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We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

Cation Geothermometers | Open Energy Information  

Open Energy Info (EERE)

Cation Geothermometers Cation Geothermometers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Cation Geothermometers Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Liquid Geothermometry Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Used to estimate reservoir temperatures. Dictionary.png Cation Geothermometers: No definition has been provided for this term. Add a Definition Introduction Some experts have stated that the factor that changes the risk assessment of a geothermal prospect the fastest is obtaining attractive chemical confirmation (geothermometry, gas analyses) that a thermal resource exists

2

Multicomponent Geothermometers | Open Energy Information  

Open Energy Info (EERE)

Multicomponent Geothermometers Multicomponent Geothermometers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Multicomponent Geothermometers Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Liquid Geothermometry Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Multicomponent Geothermometers: The multicomponent geothermometry method consists of using full chemical analyses of water samples to compute the saturation indices (log(Q/K)) of reservoir minerals over a range of temperatures. The saturation indices are graphed as a function of temperature, and the clustering of log(Q/K) curves

3

Silica Geothermometers | Open Energy Information  

Open Energy Info (EERE)

Silica Geothermometers Silica Geothermometers Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Silica Geothermometers Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Liquid Geothermometry Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Used to estimate reservoir temperatures. Dictionary.png Silica Geothermometers: No definition has been provided for this term. Add a Definition Introduction Some experts have stated that the factor that changes the risk assessment of a geothermal prospect the fastest is obtaining attractive chemical confirmation (geothermometry, gas analyses) that a thermal resource exists

4

Geothermometry At Lassen Volcanic National Park Area (Janik & Mclaren,  

Open Energy Info (EERE)

Geothermometry At Lassen Volcanic National Park Area (Janik & Mclaren, Geothermometry At Lassen Volcanic National Park Area (Janik & Mclaren, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Lassen Volcanic National Park Area (Janik & Mclaren, 2010) Exploration Activity Details Location Lassen Volcanic National Park Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Analyses of eight well samples taken consecutively during the flow test showed an inverse correlation between NH3 and Cl_ concentrations. The last sample taken had a pH of 8.35 and contained 2100 ppm Cl_ and 0.55 ppm NH3. Ratios of Na+/K+ and Na+/Cl_ remained nearly constant throughout the flow test. Cation geothermometers (with inherent uncertainties of at least

5

Geothermometry At Coso Geothermal Area (1980) | Open Energy Information  

Open Energy Info (EERE)

Geothermometry At Coso Geothermal Area (1980) Geothermometry At Coso Geothermal Area (1980) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Geothermometry Activity Date 1980 Usefulness useful DOE-funding Unknown Exploration Basis Fluid temperature of feed water Notes Cation and sulfate isotope geothermometers indicate that the reservoir feeding water to the Coso Hot Spring well has a temperature of about 240 -250 C, and the reservoir feeding the CGEH well has a temperature of about 205 C. The variation in the chemical composition of water from the two wells suggests a model in which water-rock chemical equilibrium is maintained as a convecting solution cools from about 245-205 C by conductive heat loss. References Fournier, R.O.; Thompson, J.M.; Austin, C.F. (10 May 1980)

6

Multicomponent Equilibrium Models for Testing Geothermometry Approaches  

SciTech Connect (OSTI)

Geothermometry is an important tool for estimating deep reservoir temperature from the geochemical composition of shallower and cooler waters. The underlying assumption of geothermometry is that the waters collected from shallow wells and seeps maintain a chemical signature that reflects equilibrium in the deeper reservoir. Many of the geothermometers used in practice are based on correlation between water temperatures and composition or using thermodynamic calculations based a subset (typically silica, cations or cation ratios) of the dissolved constituents. An alternative approach is to use complete water compositions and equilibrium geochemical modeling to calculate the degree of disequilibrium (saturation index) for large number of potential reservoir minerals as a function of temperature. We have constructed several “forward” geochemical models using The Geochemist’s Workbench to simulate the change in chemical composition of reservoir fluids as they migrate toward the surface. These models explicitly account for the formation (mass and composition) of a steam phase and equilibrium partitioning of volatile components (e.g., CO2, H2S, and H2) into the steam as a result of pressure decreases associated with upward fluid migration from depth. We use the synthetic data generated from these simulations to determine the advantages and limitations of various geothermometry and optimization approaches for estimating the likely conditions (e.g., temperature, pCO2) to which the water was exposed in the deep subsurface. We demonstrate the magnitude of errors that can result from boiling, loss of volatiles, and analytical error from sampling and instrumental analysis. The estimated reservoir temperatures for these scenarios are also compared to conventional geothermometers. These results can help improve estimation of geothermal resource temperature during exploration and early development.

Cooper, D. Craig; Carl D. Palmer; Robert W. Smith; Travis L. McLing

2013-02-01T23:59:59.000Z

7

Definition: Multicomponent Geothermometers | Open Energy Information  

Open Energy Info (EERE)

Multicomponent Geothermometers Multicomponent Geothermometers Jump to: navigation, search Dictionary.png Multicomponent Geothermometers The multicomponent geothermometry method consists of using full chemical analyses of water samples to compute the saturation indices (log(Q/K)) of reservoir minerals over a range of temperatures. The saturation indices are graphed as a function of temperature, and the clustering of log(Q/K) curves near zero at any specific temperature (for a group of certain reservoir minerals) is used to infer the reservoir temperature.[1] References ↑ Berkeley Lab Earth Sciences Division Website: GeoT: A Computer Program for Multicomponent Geothermometry and Geochemical Speciation Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like. rieved from

8

Definition: Geothermometry | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Geothermometry Jump to: navigation, search Dictionary.png Geothermometry Chemical geothermometers are used to estimate reservoir temperatures for most of the systems. The geothermometers are based on temperature- dependent, water-rock reactions which control the chemical and isotopic composition of the thermal water. This method is applicable only to hot-water systems because the common chemical constituents of thermal water (SiO2, Na, K, Ca, Mg, Cl, HCO3, and CO3) are soluble in liquid water but lack significant solubility in steam.[1] View on Wikipedia Wikipedia Definition Geothermobarometry is the science of measuring the previous pressure and temperature history of a metamorphic or intrusive igneous rocks.

9

Geothermometry At Long Valley Caldera Area (Sorey, Et Al., 1991) | Open  

Open Energy Info (EERE)

Long Valley Caldera Area (Sorey, Et Long Valley Caldera Area (Sorey, Et Al., 1991) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Geothermometry Activity Date Usefulness could be useful with more improvements DOE-funding Unknown Notes Silica-geothermometer temperature estimates for the Casa Diablo and RDO-8 well samples ( 196-202 degrees C) are lower than the corresponding cation-geothermometer temperature estimates, indicating loss of silica with declining reservoir temperature or dilution with low-silica waters. At shallow depths in the caldera References Michael L. Sorey, Gene A. Suemnicht, Neil C. Sturchio, Gregg A. Nordquist (1991) New Evidence On The Hydrothermal System In Long Valley Caldera, California, From Wells, Fluid Sampling, Electrical Geophysics, And

10

Geothermometry At Central Nevada Seismic Zone Region (Shevenell & De  

Open Energy Info (EERE)

Region (Shevenell & De Region (Shevenell & De Rocher, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Central Nevada Seismic Zone Region (Shevenell & De Rocher, 2005) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown References Lisa Shevenell, Ted De Rocher (2005) Evaluation Of Chemical Geothermometers For Calculating Reservoir Temperatures At Nevada Geothermal Power Plants Retrieved from "http://en.openei.org/w/index.php?title=Geothermometry_At_Central_Nevada_Seismic_Zone_Region_(Shevenell_%26_De_Rocher,_2005)&oldid=401374" Category: Exploration Activities What links here

11

Geothermometry At Raft River Geothermal Area (1980) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Raft River Geothermal Area (1980) Geothermometry At Raft River Geothermal Area (1980) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Geothermometry Activity Date 1980 Usefulness not indicated DOE-funding Unknown Notes Geothermometer temperatures of shallow samples suggest significant re-equilibration at temperatures below those found in the deep wells. Silica geothermometer temperatures of water samples from the deep wells are in reasonable agreement with measured temperatures, whereas Na-K-Ca temperatures are significantly higher than measured temperatures. The chemical characteristics of the water, as indicated by chloride concentration, are extremely variable in shallow and deep samples. Chloride concentrations of the deep samples range from 580 to 2200 mg/kg.

12

Geothermometry At Akutan Fumaroles Area (Kolker, Et Al., 2010) | Open  

Open Energy Info (EERE)

Akutan Fumaroles Area (Kolker, Et Al., 2010) Akutan Fumaroles Area (Kolker, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Akutan Fumaroles Area (Kolker, Et Al., 2010) Exploration Activity Details Location Akutan Fumaroles Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes The chemistry of the hot springs strongly suggests the existence of a neutral chloride reservoir with economically developable temperature. The fluid geothermometry tells a consistent story, with cation geothermometry detecting a >210degrees C reservoir temperature, probably near the fumarole, and silica geothermometry and presence of sinter suggesting that 160 to 180degrees C exists close to hot spring B. References

13

Geothermometry At Lassen Volcanic National Park Area (Janik ...  

Open Energy Info (EERE)

but are within the 220-240 degrees C range calculated using cation, sulfate-water isotope, and mixing model geothermometers (Muffler et al., 1982). References (Unknown)...

14

Isotope Geothermometry | Open Energy Information  

Open Energy Info (EERE)

Isotope Geothermometry Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Isotope Geothermometry Details Activities (0) Areas (0) Regions (0)...

15

Geothermometry At Walker-Lane Transitional Zone Region (Shevenell & De  

Open Energy Info (EERE)

Shevenell & De Shevenell & De Rocher, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Walker-Lane Transitional Zone Region (Shevenell & De Rocher, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown References Lisa Shevenell, Ted De Rocher (2005) Evaluation Of Chemical Geothermometers For Calculating Reservoir Temperatures At Nevada Geothermal Power Plants Retrieved from "http://en.openei.org/w/index.php?title=Geothermometry_At_Walker-Lane_Transitional_Zone_Region_(Shevenell_%26_De_Rocher,_2005)&oldid=399607" Category: Exploration Activities What links here Related changes

16

Category:Geothermometry | Open Energy Information  

Open Energy Info (EERE)

following 2 subcategories, out of 2 total. G Gas Geothermometry 1 pages I Isotope Geothermometry 1 pages Pages in category "Geothermometry" The following 4 pages...

17

Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) |  

Open Energy Info (EERE)

Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Upper Hot Creek Ranch Area (Benoit & Blackwell, 2006) Exploration Activity Details Location Upper Hot Creek Ranch Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Ten water samples were collected for chemical analysis and interpretation. Analyses of three samples of the UHCR thermal give predicted subsurface temperatures ranging from 317 to 334 oF from the Na-K-Ca, silica (quartz), and Na-Li geothermometers. The fact that all three thermometers closely agree gives the predictions added credibility. References Dick Benoit, David Blackwell (2006) Exploration Of The Upper Hot

18

Geothermometry At Northern Basin & Range Region (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Northern Basin & Range Region (Laney, 2005) Geothermometry At Northern Basin & Range Region (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Northern Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of

19

Geothermometry | Open Energy Information  

Open Energy Info (EERE)

Geothermometry Geothermometry Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geothermometry Details Activities (65) Areas (48) Regions (5) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: Geochemical Data Analysis Parent Exploration Technique: Geochemical Data Analysis Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: used to estimate reservoir temperatures Cost Information Low-End Estimate (USD): 30.003,000 centUSD 0.03 kUSD 3.0e-5 MUSD 3.0e-8 TUSD / sample Median Estimate (USD): 30.003,000 centUSD 0.03 kUSD 3.0e-5 MUSD 3.0e-8 TUSD / sample High-End Estimate (USD): 30.003,000 centUSD 0.03 kUSD 3.0e-5 MUSD 3.0e-8 TUSD / sample Dictionary.png Geothermometry:

20

Geothermometry At Buffalo Valley Hot Springs Area (Laney, 2005) | Open  

Open Energy Info (EERE)

Buffalo Valley Hot Springs Area (Laney, 2005) Buffalo Valley Hot Springs Area (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Buffalo Valley Hot Springs Area (Laney, 2005) Exploration Activity Details Location Buffalo Valley Hot Springs Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Geothermometry At Desert Queen Area (Garchar & Arehart, 2008) | Open Energy  

Open Energy Info (EERE)

Queen Area (Garchar & Arehart, 2008) Queen Area (Garchar & Arehart, 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Desert Queen Area (Garchar & Arehart, 2008) Exploration Activity Details Location Desert Queen Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Temperatures of the reservoir at depth are estimated to be between 92-141 degrees C and were calculated using the δ18O(SO4-H2O) geothermometer. It is unclear whether these temperatures reflect waters from the outflow zone of the Desert Peak geothermal system, or waters from a different reservoir at Desert Queen. Quartz, chalcedony, amorphous silica, Na-K-Ca, and δ18O(SO4-H2O) geothermometer calculations were performed.

22

An experimental investigation into the effects of fluid composition on certain geothermometry methods  

E-Print Network [OSTI]

at the lower temperatures, and 5) thermal waters do not mix with shallower, cooler ground water. Silica geothermometer The dissolved silica content of geothermal water is used in geothermometry because silica is present in most geologic settings... This presents a real problem in evaluation of the geo- thermal potential of the area; one method gives reservoir temperatures high enough for potential geothermal energy use but another gives temperatures that are too low. The waters studied by Henry can...

Pope, Leslie Anne

2012-06-07T23:59:59.000Z

23

Geothermometry At Nw Basin & Range Region (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Nw Basin & Range Region (Laney, Geothermometry At Nw Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

24

Geothermometry At Nevada Test And Training Range Area (Sabin, Et Al., 2004)  

Open Energy Info (EERE)

2004) 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Nevada Test And Training Range Area (Sabin, Et Al., 2004) Exploration Activity Details Location Nevada Test And Training Range Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Groundwater data are limited to a portion of NAFR; data are more plentiful beyond the range boundaries. Geothermometry yields calculated groundwater temperatures generally ranging from 30 to 105degrees C, with a rough correlation between the SiO2-chalcedony and the Na-K-Na (Mg-corrected) geothermometers. References A. E. Sabin, J. D. Walker, J. Unruh, F. C. Monastero (2004) Toward The Development Of Occurrence Models For Geothermal Resources In The

25

Category:Gas Geothermometry | Open Energy Information  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Gas Geothermometry page? For detailed information on Gas Geothermometry as exploration...

26

Gas Geothermometry | Open Energy Information  

Open Energy Info (EERE)

Gas Geothermometry Details Activities (0) Areas (0) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group:...

27

Geothermometry At Columbus Salt Marsh Area (Shevenell, Et Al., 2008) | Open  

Open Energy Info (EERE)

Geothermometry At Columbus Salt Marsh Area (Shevenell, Et Al., 2008) Geothermometry At Columbus Salt Marsh Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Columbus Salt Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Columbus Salt Marsh Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1). Subsequent field verification and chemical analyses of well, spring and groundwater samples indicated the presence of hidden subsurface geothermal reservoirs. Cation and quartz geothermometry indicate subsurface reservoir temperatures between 118°C and 162°C at all three

28

Evaluation Of Chemical Geothermometers For Calculating Reservoir...  

Open Energy Info (EERE)

Geothermometers For Calculating Reservoir Temperatures At Nevada Geothermal Power Plants Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper:...

29

Geothermometry At Central Nevada Seismic Zone Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Region Region (Laney, 2005) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

30

Geothermometry At Walker-Lane Transitional Zone Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being

31

Geothermometry At Clear Lake Area (Thompson, Et Al., 1992) | Open Energy  

Open Energy Info (EERE)

Clear Lake Area (Thompson, Et Al., 1992) Clear Lake Area (Thompson, Et Al., 1992) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Clear Lake Area (Thompson, Et Al., 1992) Exploration Activity Details Location Clear Lake Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Based on the above discussion, we favor a model in which thermal water rises somewhere between Howard and Seigler Springs. At Howard Springs we see evidence for the most representative deep thermal water because the C1 is elevated (highest measured C1 concentrations occur at Howard Springs). Moreover, the Na-Li, Na-K and Na-K-Ca geothermometers suggest temperatures greater than 240 degrees C. References J. M. Thompson, R. H. Mariner, L. D. White, T. S. Presser, W. C.

32

Optimized multicomponent vs. classical geothermometry: Insights from modeling studies at the Dixie Valley geothermal area  

Science Journals Connector (OSTI)

Abstract A new geothermometry approach is explored, incorporating multicomponent geothermometry coupled with numerical optimization to provide more confident estimates of geothermal reservoir temperatures when results of classical geothermometers are inconsistent. This approach is applied to geothermal well and spring waters from the Dixie Valley geothermal area (Nevada), to evaluate the influence of salt brines mixing and dilution of geothermal fluids on calculated temperatures. The main advantage of the optimized multicomponent method over classical geothermometers is its ability to quantify the extent of dilution and gas loss experienced by a geothermal fluid, and to optimize other poorly constrained or unknown parameters (such as Al and Mg concentrations), allowing the reconstruction of the deep reservoir fluid composition and therefore gaining confidence in reservoir temperatures estimations. Because the chemical evolution of deep geothermal fluids is a combination of multiple time-dependent processes that take place when these fluids ascend to the surface, reactive transport modeling is used to assess constraints on the application of solute geothermometers. Simulation results reveal that Al and Mg concentrations of ascending fluids are sensitive to mineral precipitation–dissolution affecting reservoir temperatures inferred with multicomponent geothermometry. In contrast, simulations show that the concentrations of major elements such as Na, K, and SiO2 are less sensitive to re-equilibration. Geothermometers based on these elements give reasonable reservoir temperatures in many cases, except when dilution or mixing with saline waters has taken place. Optimized multicomponent geothermometry yields more representative temperatures for such cases. Taking into account differences in estimated temperatures, and chemical compositions of the Dixie Valley thermal waters, a conceptual model of two main geothermal reservoirs is proposed. The first reservoir is located along the Stillwater range normal fault system and has an estimated temperature of 240–260 °C. It covers the area corresponding to the geothermal field but could extend towards the south-west where deep temperatures of 200–225 °C are estimated. The second reservoir has an estimated temperature of 175–190 °C and extends from well 62-21 to northeastern Hyder, Lower Ranch, Fault Line, and Jersey springs.

L. Peiffer; C. Wanner; N. Spycher; E.L. Sonnenthal; B.M. Kennedy; J. Iovenitti

2014-01-01T23:59:59.000Z

33

Geothermometry At Rhodes Marsh Area (Shevenell, Et Al., 2008) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Rhodes Marsh Area (Shevenell, Et Geothermometry At Rhodes Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Rhodes Marsh Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1). Subsequent field verification and chemical analyses of well, spring and groundwater samples indicated the presence of hidden subsurface geothermal reservoirs. Cation and quartz geothermometry indicate subsurface reservoir temperatures between 118°C and 162°C at all three areas based on results from waters sampled proximal to borate crusts. References Lisa Shevenell, Mark Coolbaugh, Chris Sladek, Rick Zehner, Chris

34

Geothermometry At Nevada Test And Training Range Area (Sabin...  

Open Energy Info (EERE)

Geothermometry At Nevada Test And Training Range Area (Sabin, Et Al., 2004) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At...

35

Geothermometry At Blackfoot Reservoir Area (Hutsinpiller & Parry...  

Open Energy Info (EERE)

Activity Date Usefulness useful DOE-funding Unknown References Amy Hutsinpiller, W. T. Parry (1985) Geochemistry And Geothermometry Of Spring Water From The Blackfoot...

36

Colorado thermal spring water geothermometry (public dataset...  

Open Energy Info (EERE)

dataset) Jump to: navigation, search OpenEI Reference LibraryAdd to library General: Colorado thermal spring water geothermometry (public dataset) Abstract The zipped Excel file...

37

Category:Isotope Geothermometry | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Category Edit History Facebook icon Twitter icon Category:Isotope Geothermometry Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home...

38

Geothermometry At Teels Marsh Area (Shevenell, Et Al., 2008) | Open Energy  

Open Energy Info (EERE)

Shevenell, Et Al., 2008) Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Teels Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Teels Marsh Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Borate crusts that were partially mined during the 1800s were identified and mapped at Rhodes, Teels, and Columbus Marshes (playas), all in western Nevada (Figure 1). Subsequent field verification and chemical analyses of well, spring and groundwater samples indicated the presence of hidden subsurface geothermal reservoirs. Cation and quartz geothermometry indicate subsurface reservoir temperatures between 118°C and 162°C at all three areas based on results from waters sampled proximal to borate crusts.

39

Chemical Geothermometers And Mixing Models For Geothermal Systems | Open  

Open Energy Info (EERE)

Geothermometers And Mixing Models For Geothermal Systems Geothermometers And Mixing Models For Geothermal Systems Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Chemical Geothermometers And Mixing Models For Geothermal Systems Details Activities (1) Areas (1) Regions (0) Abstract: Qualitative chemical geothermometers utilize anomalous concentrations of various "indicator" elements in groundwaters, streams, soils, and soil gases to outline favorable places to explore for geothermal energy. Some of the qualitative methods, such as the delineation of mercury and helium anomalies in soil gases, do not require the presence of hot springs or fumaroles. However, these techniques may also outline fossil thermal areas that are now cold. Quantitative chemical geothermometers and mixing models can provide information about present probable minimum

40

Geothermometry At Honokowai Area (Thomas, 1986) | Open Energy Information  

Open Energy Info (EERE)

Geothermometry At Honokowai Area (Thomas, 1986) Geothermometry At Honokowai Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Honokowai Area (Thomas, 1986) Exploration Activity Details Location Honokowai Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Temperature and groundwater chemistry analyses were performed on three wells along the alluvial fan above Honokowai. Water temperatures were approximately 20degrees C and normal basal aquifer water chemistry was observed (Table 4). References Donald M. Thomas (1 January 1986) Geothermal Resources Assessment In Hawaii Retrieved from "http://en.openei.org/w/index.php?title=Geothermometry_At_Honokowai_Area_(Thomas,_1986)&oldid=387033"

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Cation Geothermometers At Lightning Dock Geothermal Area (Witcher...  

Open Energy Info (EERE)

Number DE-FC07-00AL66977 Notes This project deepened a well and took 4 samples from wells around the Lightning Docks KGRA and performed extensive chamical and isotope analysis...

42

Geochemical Techniques | Open Energy Information  

Open Energy Info (EERE)

Geochemical Techniques Geochemical Techniques Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Geochemical Techniques Details Activities (0) Areas (0) Regions (0) NEPA(1) Exploration Technique Information Exploration Group: Geochemical Techniques Exploration Sub Group: None Parent Exploration Technique: Exploration Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Thermal: Dictionary.png Geochemical Techniques: No definition has been provided for this term. Add a Definition Related Techniques Geochemical Techniques Geochemical Data Analysis Geothermometry Gas Geothermometry Isotope Geothermometry Liquid Geothermometry Cation Geothermometers Multicomponent Geothermometers Silica Geothermometers Thermal Ion Dispersion

43

Geothermometry At Fish Lake Valley Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Fish Lake Valley Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Fish Lake Valley Area (DOE GTP) Exploration...

44

Geothermometry At Gabbs Alkali Flat Area (Kratt, Et Al., 2008...  

Open Energy Info (EERE)

Alkali Flat Area (Kratt, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Gabbs Alkali Flat Area (Kratt, Et Al.,...

45

Geothermometry At Teels Marsh Area (Coolbaugh, Et Al., 2006)...  

Open Energy Info (EERE)

Coolbaugh, Et Al., 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Teels Marsh Area (Coolbaugh, Et Al., 2006) Exploration...

46

Geothermometry At Rhodes Marsh Area (Coolbaugh, Et Al., 2006...  

Open Energy Info (EERE)

Coolbaugh, Et Al., 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Rhodes Marsh Area (Coolbaugh, Et Al., 2006)...

47

Geothermometry At Fort Bliss Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Fort Bliss Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Fort Bliss Area (DOE GTP) Exploration Activity...

48

Geothermometry At Coso Geothermal Area (1978) | Open Energy Information  

Open Energy Info (EERE)

Geothermometry At Coso Geothermal Area (1978) Geothermometry At Coso Geothermal Area (1978) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Coso Geothermal Area (1978) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Geothermometry Activity Date 1978 Usefulness useful DOE-funding Unknown Exploration Basis Determine fluid origin in two exploratory wells Notes Collected water from original coso hot springs well (1967) and CGEH No. 1. and completed chemical analysis to determine fluid origin. The surface expression of fumarole and acid sulfate pools and shallow steam wells gives a false indication of an extensive vapor dominated system because upward convecting, boiling alkaline-chloride waters do not reach the surface.

49

Geothermometry At Haleakala Volcano Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Haleakala Volcano Area (Thomas, 1986) Geothermometry At Haleakala Volcano Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Haleakala Volcano Area (Thomas, 1986) Exploration Activity Details Location Haleakala Volcano Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes The field survey program on the northwest rift zone consisted of soil mercury and radon emanometry surveys, groundwater temperature and chemistry studies, Schlumberger resistivity soundings and self-potential profiles. Geophysical and geochemical surveys along this rift (southwest) were limited by difficult field conditions and access limitations. The geophysical program consisted of one Schlumberger sounding, one

50

Geothermometry At Socorro Mountain Area (Armstrong, Et Al., 1995) | Open  

Open Energy Info (EERE)

Geothermometry At Socorro Mountain Area (Armstrong, Et Al., 1995) Geothermometry At Socorro Mountain Area (Armstrong, Et Al., 1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Socorro Mountain Area (Armstrong, Et Al., 1995) Exploration Activity Details Location Socorro Mountain Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Corresponding Socorro caldera Carboniferous rocks were studied in the field in 1988-1992-Renault later completed geochemistry and silica-crystallite geothermometry, Armstrong petrographic analysis and cathodoluminescence, Oscarson SEM studies, and John Repetski (USGS, Reston, Virgina) conodont stratigraphy and color and textural alteration as guides to the carbonate rocks' thermal history. The carbonate-rock classification used in this

51

Geothermometry At Kawaihae Area (Thomas, 1986) | Open Energy Information  

Open Energy Info (EERE)

Geothermometry At Kawaihae Area (Thomas, 1986) Geothermometry At Kawaihae Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Kawaihae Area (Thomas, 1986) Exploration Activity Details Location Kawaihae Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Groundwater chemical data are limited due to the small number of wells near Kawaihae; however, the data that are available strongly substantiate the presence of a thermal resource. A measured water temperature of 31 degrees C in one well is clearly above normal ambient temperatures, and the chloride/magnesium ion ratio in the same well is elevated substantially above the normal range (Table 8). Both of these data provide strong evidence that at least a low-level thermal anomaly is present in the area.

52

Geothermometry At Mauna Loa Northeast Rift Area (Thomas, 1986) | Open  

Open Energy Info (EERE)

Geothermometry At Mauna Loa Northeast Rift Area (Thomas, 1986) Geothermometry At Mauna Loa Northeast Rift Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Mauna Loa Northeast Rift Area (Thomas, 1986) Exploration Activity Details Location Mauna Loa Northeast Rift Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes A reexamination of all groundwater sources in the Keaau area was undertaken in an effort to confirm the chemical and temperature anomalies that formed the primary basis on which the Keaau area was identified during the preliminary assessment survey. The data generated by this survey (Table 9) determined that all of the anomalous data present in the earlier data base were spurious and that the groundwater chemistry and temperatures in this

53

Geothermometry At Lualualei Valley Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Lualualei Valley Area (Thomas, 1986) Geothermometry At Lualualei Valley Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Lualualei Valley Area (Thomas, 1986) Exploration Activity Details Location Lualualei Valley Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Yhe extensive set of groundwater chemical data compiled for the wells in the valley (Table 1) showed that two of the primary indicators that have been commonly used in Hawaii for identifying geothermal potential (i.e. silica concentration and chloride to magnesium ion ratios) were anomalous in the groundwater of this survey area (Cox and Thomas, 1979). Several wells located on the caldera boundaries were found to have both

54

Application Of An Artificial Neural Network Model To A Na-K Geothermometer  

Open Energy Info (EERE)

Application Of An Artificial Neural Network Model To A Na-K Geothermometer Application Of An Artificial Neural Network Model To A Na-K Geothermometer Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Application Of An Artificial Neural Network Model To A Na-K Geothermometer Details Activities (3) Areas (2) Regions (0) Abstract: A new geothermometer model is proposed by applying data obtained from a known Na-K geothermometer to an artificial neural network. In this model, Na and K values were implemented as input signals and geothermometers as the output signal. Multi-layer perceptrons and back propagation were used as training algorithms for the artificial neural network. Reservoir temperatures of some geothermal fields in Turkey determined by this method are in accord with those determined from other methods.

55

Geochemistry And Geothermometry Of Spring Water From The Blackfoot  

Open Energy Info (EERE)

Geothermometry Of Spring Water From The Blackfoot Geothermometry Of Spring Water From The Blackfoot Reservoir Region, Southeastern Idaho Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Geochemistry And Geothermometry Of Spring Water From The Blackfoot Reservoir Region, Southeastern Idaho Details Activities (3) Areas (1) Regions (0) Abstract: The Blackfoot Reservoir region in southeastern Idaho is recognized as a potential geothermal area because of the presence of several young rhyolite domes (50,000 years old), Quaternary basalt flows, and warm springs. North- to northwest-trending high-angle normal faults of Tertiary to Holocene age appear to be the dominant structural control of spring activity. Surface spring-water temperatures average 14°C except for a group of springs west of the Reservoir Mountains which average 33°C.

56

Geothermometry At Lahaina-Kaanapali Area (Thomas, 1986) | Open Energy  

Open Energy Info (EERE)

Lahaina-Kaanapali Area (Thomas, 1986) Lahaina-Kaanapali Area (Thomas, 1986) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Lahaina-Kaanapali Area (Thomas, 1986) Exploration Activity Details Location Lahaina-Kaanapali Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Groundwater temperature and chemistry surveys were similarly unable to identify any detectable thermal influence on the basal groundwaters. Silica concentrations and water temperatures (Table 4) were within the normal range expected for basal groundwaters receiving a limited amount of irrigation return water; chloride/magnesium ratios ranged downward from normal seawater values. References Donald M. Thomas (1 January 1986) Geothermal Resources Assessment In

57

A New Improved Na-K Geothermometer By Artificial Neural Networks | Open  

Open Energy Info (EERE)

Improved Na-K Geothermometer By Artificial Neural Networks Improved Na-K Geothermometer By Artificial Neural Networks Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: A New Improved Na-K Geothermometer By Artificial Neural Networks Details Activities (0) Areas (0) Regions (0) Abstract: A new Na/K geothermometer equation has been developed. The temperature function is:Concentrations are in mg/kg. The new improved geothermometer equation was developed by artificial neural networks. The normalized mean square error (NMSE) used in the new improved Na/K equation for temperatures ranging from 94 to 345°C is 0.179, which is lower than the corresponding NMSE 0.226, 0.598, 0.656, 0.268, 0.328 and 0.225 for the equations of Arnorsson et al. (1983; Geochim. Cosmochim. Acta 47, 567-577), Truesdell (1975; Proc. 2nd UN Symposium), Tonani (1980; Proc. Adv. Eur.

58

Improved Geothermometry Through Multivariate Reaction Path Modeling and Evaluation of Geomicrobiological Influences on Geochemical Temperature Indicators  

Broader source: Energy.gov [DOE]

Improved Geothermometry Through Multivariate Reaction Path Modeling and Evaluation of Geomicrobiological Influences on Geochemical Temperature Indicators presentation at the April 2013 peer review meeting held in Denver, Colorado.

59

New Improved Equations For Na-K, Na-Li And Sio2 Geothermometers By Outlier  

Open Energy Info (EERE)

Improved Equations For Na-K, Na-Li And Sio2 Geothermometers By Outlier Improved Equations For Na-K, Na-Li And Sio2 Geothermometers By Outlier Detection And Rejection Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: New Improved Equations For Na-K, Na-Li And Sio2 Geothermometers By Outlier Detection And Rejection Details Activities (1) Areas (1) Regions (0) Abstract: We present new improved equations for three still widely used Na/K, Na/Li and SiO2 geothermometers (obtained by statistical treatment of the data and application of outlier detection and rejection as well as theory of error propagation) and compare them with those by Fournier and others. New equations are also developed for estimating errors associated with the use of these new geothermometric equations and comparing them with the performance of the original equations. The errors in the use of the new

60

Geothermometry At Hot Springs Ranch Area (Szybinski, 2006) | Open Energy  

Open Energy Info (EERE)

Hot Springs Ranch Area (Szybinski, 2006) Hot Springs Ranch Area (Szybinski, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Hot Springs Ranch Area (Szybinski, 2006) Exploration Activity Details Location Hot Springs Ranch Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes The brine from the drill holes, hot springs, seepages, and irrigation wells was sampled, as well as water from two nearby creeks, (total of 13 samples) and sent for analysis to Thermochem Inc. For sample locations refer to Figure 35; the geochemical data are presented in Appendix C. Geochemical results indicate the presence of two distinct waters in this group of samples (Tom Powell of Thermochem Inc., personal communication, 2005).

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Geothermometry At Socorro Mountain Area (Owens, Et Al., 2005) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Socorro Mountain Area (Owens, Et Al., 2005) Geothermometry At Socorro Mountain Area (Owens, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Socorro Mountain Area (Owens, Et Al., 2005) Exploration Activity Details Location Socorro Mountain Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Pre-existing evidence includes heat gradients of upwards of 490mW/m2 from thermal-gradient wells, tepid spring waters (32oC) and silica geochemistry indicating thermal waters with a minimum of 82oC at depth References Lara Owens, Richard Baars, David Norman, Harold Tobin (2005) New Methods In Exploration At The Socorro Peak Kgra- A Gred Iii Project Retrieved from "http://en.openei.org/w/index.php?title=Geothermometry_At_Socorro_Mountain_Area_(Owens,_Et_Al.,_2005)&oldid=389518

62

An Empirical Na-K-Ca Geothermometer For Natural Waters | Open Energy  

Open Energy Info (EERE)

Empirical Na-K-Ca Geothermometer For Natural Waters Empirical Na-K-Ca Geothermometer For Natural Waters Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Empirical Na-K-Ca Geothermometer For Natural Waters Details Activities (0) Areas (0) Regions (0) Abstract: An empirical method of estimating the last temperature of water-rock interaction has been devised. It is based upon molar Na, K and Ca concentrations in natural waters from temperature environments ranging from 4 to 340°C. The data for most geothermal waters cluster near a straight line when plotted as the function vs reciprocal of absolute temperature, where Β is either or depending upon whether the water equilibrated above or below 100°C. For most waters tested, the method gives better results than the methods suggested by other workers. The ratio

63

Geothermometry At Salt Wells Area (Henkle, Et Al., 2005) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Salt Wells Area (Henkle, Et Al., 2005) Geothermometry At Salt Wells Area (Henkle, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Salt Wells Area (Henkle, Et Al., 2005) Exploration Activity Details Location Salt Wells Geothermal Area Exploration Technique Geothermometry Activity Date 2004 - 2005 Usefulness useful DOE-funding Unknown Exploration Basis Adsorbed mercury soil geochemical surveys and radiometric geophysical surveys were carried out in conjunction with geologic mapping to test the application of these ground-based techniques to geothermal exploration at three prospects in Nevada by Henkle Jr. et al. in 2005. Mercury soil vapor surveys were not widely used in geothermal exploration in the western US at the time, although the association of mercury vapors with geothermal

64

Geothermometry At U.S. Midwest Region (Vugrinovich, 1987) | Open Energy  

Open Energy Info (EERE)

Geothermometry At U.S. Midwest Region (Vugrinovich, 1987) Geothermometry At U.S. Midwest Region (Vugrinovich, 1987) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At U.S. Midwest Region (Vugrinovich, 1987) Exploration Activity Details Location U.S. Midwest Region Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes Michigan "The silica heat flow estimator does provide estimates of surface heat flow which appear to be in good agreement with conventional estimates, but which are not entirely free from disturbances caused by groundwater movements. The technique should be more widely applied to areas where conventional heat flow measurements are lacking." References Raymond Vugrinovich (1987) Regional Heat Flow Variations In The

65

Geothermometry At Reese River Area (Henkle & Ronne, 2008) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Reese River Area (Henkle & Ronne, 2008) Geothermometry At Reese River Area (Henkle & Ronne, 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Reese River Area (Henkle & Ronne, 2008) Exploration Activity Details Location Reese River Area Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Four formation water samples were collected from well 56-4, during an airlift test which took place between November 11 and November 14, 2007. One sample was taken from the Steiner Well which was the source for drilling water for the drilling of 56-4 and for the short injection test. The samples were analyzed by Thermochem for chemical constituents and by Rafter Lab at GNS for isotope analysis. References

66

Geothermometry At Fish Lake Valley Area (Deymonaz, Et Al., 2008) | Open  

Open Energy Info (EERE)

Geothermometry At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Geothermometry At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Fish Lake Valley Area (Deymonaz, Et Al., 2008) Exploration Activity Details Location Fish Lake Valley Area Exploration Technique Geothermometry Activity Date Usefulness useful DOE-funding Unknown Notes There are no thermal springs within the Emigrant prospect area, but unambiguously indigenous hotwater samples were collected from boreholes 211 (see above) and 112 (Fig. 3). These samples were analyzed for major and selected minor chemical components (Table 1; Pilkington, 1984). Hot water at 96degrees C from borehole 211 was collected by airlifting from a depth of 123 m (water level) at a rate of 240 liters per minute. The

67

Geothermometry At Salt Wells Area (Edmiston & Benoit, 1984) | Open Energy  

Open Energy Info (EERE)

Geothermometry At Salt Wells Area (Edmiston & Benoit, Geothermometry At Salt Wells Area (Edmiston & Benoit, 1984) Exploration Activity Details Location Salt Wells Geothermal Area Exploration Technique Geothermometry Activity Date 1980 - 1984 Usefulness useful DOE-funding Unknown Exploration Basis The blind Salt Wells geothermal system was first identified when Anadarko Petroleum Corporation drilled slim hole and geothermal exploration wells at the site in 1980. Two reports detail the results of this drilling activity. This paper seeks to (1) describe several moderate-temperature (150-200°C) geothermal systems discovered and drilled during the early 1980's that had not been documented previously in the literature, (2) summarize and compare chemical and temperature data from known moderate- to high-temperature (>200°C) in the region, and (3) to comment on the

68

Geothermometry At Salt Wells Area (Coolbaugh, Et Al., 2006) | Open Energy  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Geothermometry At Salt Wells Area (Coolbaugh, Et Al., 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermometry At Salt Wells Area (Coolbaugh, Et Al., 2006) Exploration Activity Details Location Salt Wells Geothermal Area Exploration Technique Geothermometry Activity Date 2005 - 2005 Usefulness useful DOE-funding Unknown Exploration Basis Geochemical water sampling, mineral distribution mapping, and shallow (30 cm) temperature probe measurements were conducted to expand on a previous field mapping study of surface geothermal features at Salt Wells, in order

69

Geothermometry At Northern Basin & Range Region (Cole, 1983) | Open Energy  

Open Energy Info (EERE)

Northern Basin & Range Region Northern Basin & Range Region (Cole, 1983) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Geothermometry Activity Date Usefulness not indicated DOE-funding Unknown Notes Wstern Utah hot springs: Antelope, Fish (Deadman), Fish (Wilson), Twin Peak, Cudahy, Laverkin, Grantsville, Crystal Prison, Arrowhead, Red Hill, Monroe, Joseph, Castilla, Saratoga, Thermo, Crater, Wasatch, Beck, Deseret, Big Spring, Blue Warm, Crystal Madsen, Udy, Cutler, Garland, Utah, Ogden, Hooper, Newcastle Area References David R. Cole (1983) Chemical And Isotopic Investigation Of Warm Springs Associated With Normal Faults In Utah Retrieved from "http://en.openei.org/w/index.php?title=Geothermometry_At_Northern_Basin_%26_Range_Region_(Cole,_1983)&oldid=4014

70

Actinide cation-cation complexes  

SciTech Connect (OSTI)

The +5 oxidation state of U, Np, Pu, and Am is a linear dioxo cation (AnO{sub 2}{sup +}) with a formal charge of +1. These cations form complexes with a variety of other cations, including actinide cations. Other oxidation states of actinides do not form these cation-cation complexes with any cation other than AnO{sub 2}{sup +}; therefore, cation-cation complexes indicate something unique about AnO{sub 2}{sup +} cations compared to actinide cations in general. The first cation-cation complex, NpO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, was reported by Sullivan, Hindman, and Zielen in 1961. Of the four actinides that form AnO{sub 2}{sup +} species, the cation-cation complexes of NpO{sub 2}{sup +} have been studied most extensively while the other actinides have not. The only PuO{sub 2}{sup +} cation-cation complexes that have been studied are with Fe{sup 3+} and Cr{sup 3+} and neither one has had its equilibrium constant measured. Actinides have small molar absorptivities and cation-cation complexes have small equilibrium constants; therefore, to overcome these obstacles a sensitive technique is required. Spectroscopic techniques are used most often to study cation-cation complexes. Laser-Induced Photacoustic Spectroscopy equilibrium constants for the complexes NpO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, NpO{sub 2}{sup +}{center_dot}Th{sup 4+}, PuO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, and PuO{sub 2}{sup +}{center_dot}Th{sup 4+} at an ionic strength of 6 M using LIPAS are 2.4 {plus_minus} 0.2, 1.8 {plus_minus} 0.9, 2.2 {plus_minus} 1.5, and {approx}0.8 M{sup {minus}1}.

Stoyer, N.J. [Lawrence Berkeley Lab., CA (United States); Seaborg, G.T. [Lawrence Livermore National Lab., CA (United States)

1994-12-01T23:59:59.000Z

71

EMSL - cation migration  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cation-migration en Diffusional Motion of Redox Centers in Carbonate Electrolytes . http:www.emsl.pnl.govemslwebpublicationsdiffusional-motion-redox-centers-carbonate-electrol...

72

Cation Uptake and Allocation by Red Pine Seedlings under Cation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Uptake and Allocation by Red Pine Seedlings under Cation-Nutrient Stress in a Column Growth Experiment. Cation Uptake and Allocation by Red Pine Seedlings under Cation-Nutrient...

73

Property:StratInfo | Open Energy Information  

Open Energy Info (EERE)

StratInfo StratInfo Jump to: navigation, search Property Name StratInfo Property Type Text Subproperties This property has the following 82 subproperties: 2 2-M Probe Survey A Active Seismic Methods Airborne Electromagnetic Survey Analytical Modeling C Caliper Log Cation Geothermometers Cement Bond Log Chemical Logging Compound and Elemental Analysis Conceptual Model Controlled Source Frequency-Domain Magnetics Cuttings Analysis D Data Acquisition-Manipulation Data Techniques Data and Modeling Techniques Drilling Methods E Earth Tidal Analysis Electric Micro Imager Log Electromagnetic Sounding Methods Elemental Analysis with Fluid Inclusion F FLIR Flow Test Fluid Inclusion Analysis Fluid Lab Analysis Formation Testing Techniques Frequency-Domain Electromagnetic Survey G Gas Geothermometry

74

Property:HydroInfo | Open Energy Information  

Open Energy Info (EERE)

HydroInfo HydroInfo Jump to: navigation, search Property Name HydroInfo Property Type Text Subproperties This property has the following 77 subproperties: 2 2-M Probe Survey A Acoustic Logs Active Seismic Methods Aeromagnetic Survey Analytical Modeling C Caliper Log Cation Geothermometers Cement Bond Log Conceptual Model Core Analysis Core Holes Cuttings Analysis D Data Acquisition-Manipulation Data Techniques Data and Modeling Techniques Drilling Methods E Electric Micro Imager Log Electromagnetic Sounding Methods Elemental Analysis with Fluid Inclusion F FLIR Formation Testing Techniques Frequency-Domain Electromagnetic Survey G Gamma Log Gas Flux Sampling Gas Geothermometry Geochemical Data Analysis G cont. Geochemical Techniques Geodetic Survey Geophysical Methods Geothermal Literature Review

75

Cationic electrodepositable coating composition comprising lignin  

DOE Patents [OSTI]

A cationic electrodepositable coating composition is disclosed. The present invention in directed to a cationic electrodepositable coating composition comprising a lignin-containing cationic salt resin, that comprises (A) the reaction product of: lignin, an amine, and a carbonyl compound; (B) the reaction product of lignin, epichlorohydrin, and an amine; or (C) combinations thereof.

Fenn, David; Bowman, Mark P; Zawacky, Steven R; Van Buskirk, Ellor J; Kamarchik, Peter

2013-07-30T23:59:59.000Z

76

Role of Cation-Water Disorder during Cation Exchange in Small-Pore Zeolite  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Role of Cation-Water Disorder during Cation Exchange in Small-Pore Zeolite Role of Cation-Water Disorder during Cation Exchange in Small-Pore Zeolite Sodium Natrolite Thursday, October 31, 2013 Structural changes leading to disordering of the cation-water arrangement within the pores of zeolite natrolite while exchanging sodium (Na+) with potassium (K+) have been investigated using x-ray diffraction (XRD) and oxygen K-edge x-ray absorption spectroscopy (XAS). cation in zeolite sodium natrolite fig1 Figure 1) Artistic representation of the natrolite channel, which opens progressively as a function of the exchanging cation's size. The small golf ball represents ordered sodium cations in a closed elliptical channel, whereas the large baseball represents a disordered cesium cation in an open circular channel. The most fundamental chemical property of zeolites is ion exchange. A

77

Hybrid Automata: An Algorithmic Approach to the Speci cation and Veri cation of  

E-Print Network [OSTI]

Hybrid Automata: An Algorithmic Approach to the Speci cation and Veri cation of Hybrid Systems1 of hybrid automata as a model and speci cation language for hybrid systems. Hybrid automatacan be viewed erential equations. We show that many of the examples considered in the workshop can be de ned by hybrid

Henzinger, Thomas A.

78

Automatically generating information from a Z speci cation to support the Classi cation Tree  

E-Print Network [OSTI]

Automatically generating information from a Z speci#12;cation to support the Classi#12;cation Tree, Brunel University, Uxbridge, Middlesex, UB8 3PH, UK 2 DaimlerChrysler AG, Research Information. The Classi#12;cation Tree Method provides a exible basis for systematic testing. Traditionally

Singer, Jeremy

79

Speci cation and Veri cation of a Steam-Boiler with Signal-Coq Micka l Kerb uf1  

E-Print Network [OSTI]

Speci cation and Veri cation of a Steam-Boiler with Signal-Coq Micka l Kerb uf1 , David Nowak2 assistant, Coq, for the speci cation and the veri cation of co-inductive properties of the well-known steam-boiler cation tools. Keywords: synchronous programming, theorem proving, the steam- boiler problem. 1

Boyer, Edmond

80

Cationic phospholipids: structure?transfection activity relationships  

SciTech Connect (OSTI)

Synthetic cationic lipids are presently the most widely used non-viral gene carriers. Examined here is a particularly attractive cationic lipid class, triester phosphatidylcholines (PCs) exhibiting low toxicities and good transfection efficiency. Similarly to other cationic lipids, they form stable complexes (lipoplexes) with the polyanionic nucleic acids. A summary of studies on a set of {approx}30 cationic PCs reveals the existence of a strong, systematic dependence of their transfection efficiency on the lipid hydrocarbon chain structure: transfection activity increases with increase of chain unsaturation from 0 to 2 double bonds per lipid and decreases with increase of chain length in the range {approx}30-50 total number of chain carbon atoms. Maximum transfection was observed for ethyl phosphate PCs (EPCs) with monounsaturated 14:1 chains (total of 2 double bonds and 30 chain carbon atoms). Lipid phase behavior is known to depend strongly on the chain molecular structure and the above relationships thus substantiate a view that cationic PC phase propensities are an important determinant of their activity. Indeed, X-ray structural studies show that the rate of DNA release from lipoplexes as well as transfection activity well correlate with non-lamellar phase progressions observed in cationic PC mixtures with membrane lipids. These findings appear to be of considerable interest because, according to current views, key processes in lipid-mediated transfection such as lipoplex disassembly and DNA release within the cells are believed to take place upon cationic lipid mixing with cellular lipids.

Koynova, Rumiana; Tenchov, Boris; (NWU)

2010-01-18T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Are the Radical Centers in Peptide Radical Cations Mobile? The...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the Radical Centers in Peptide Radical Cations Mobile? The Generation, Tautomerism, and Dissociation of Isomeric ? Are the Radical Centers in Peptide Radical Cations Mobile?...

82

Increased Radical Cation Yields: Arenes in DCE  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Increased Yields of Radical Cations by Arene Addition to Irradiated Increased Yields of Radical Cations by Arene Addition to Irradiated 1,2-Dichloroethane Alison M. Funston and John R. Miller Radiat. Phys. Chem., 72, 601-611 (2005). [Find paper at Elsevier Science Direct] Abstract: Pulse radiolysis in chlorinated hydrocarbon liquids such as 1,2-dichloroethane is a versatile and effective method for the generation of solute radical cations. The addition of a large concentration of toluene or benzene to solutions of 1,2-dichloroethane is found to increase the yield of solute radical cations (G = 0.68 molecules/100 eV in 1,2-dichloroethane (Wang et al., 1979) by a factor of 2.5. The increased yield is found for solutes which have a potential of ~ 1.1 V (vs SCE) or below for the S+·/S couple and is due to reaction of the chlorine

83

Cationically polymerizable monomers derived from renewable sources  

SciTech Connect (OSTI)

The objective of this project is to make use of products obtained from renewable plant sources as monomers for the direct production of polymers which can be used for a wide range of plastic applications. In this report is described progress in the synthesis and polymerization of cationically polymerizable monomers and oligomers derived from botanical oils, terpenes, natural rubber, and lignin. Nine different botanical oils were obtained from various sources, characterized and then epoxidized. Their photopolymerization was carried out using cationic photoinitiators and the mechanical properties of the resulting polymers characterized. Preliminary biodegradation studies are being conducted on the photopolymerized films from several of these oils. Limonene was cationically polymerized to give dimers and the dimers epoxidized to yield highly reactive monomers suitable for coatings, inks and adhesives. The direct phase transfer epoxidation of squalene and natural rubber was carried out. The modified rubbers undergo facile photocrosslinking in the presence of onium salts to give crosslinked elastomers. 12 refs., 3 figs., 10 tabs.

Crivello, J.V.

1991-10-01T23:59:59.000Z

84

Cationically polymerizable monomers derived from renewable sources  

SciTech Connect (OSTI)

The objectives of this project are to design and synthesize novel monomers which orginate from renewable biological sources and to carry out their rapid, efficient, pollution-free and energy efficient cationic polymerization to useful products under the influence of ultraviolet light or heat. A summary of the results of the past year's research on cationically polymerizable monomers derived from renewable sources is presented. Three major areas of investigation corresponding to the different classes of naturally occurring starting materials were investigated; epoxidized terpenes and natural rubber and vinyl ethers from alcohols and carbohydrates.

Crivello, J.V.

1992-10-01T23:59:59.000Z

85

Effect of cationic monomer on properties of cationic fluorocarbon emulsifier-free emulsion  

Science Journals Connector (OSTI)

Cationic fluorocarbon emulsifier-free emulsion (CFE) was prepared by a novel method, ... to emulsion. The stability mechanism of the CFE system was proposed. The pre-copolymer prepared ... it had disadvantages to...

Chen Wang; Xiaorui Li; Biao Du; Peizhi Li; Xiaohui Mi

2013-02-01T23:59:59.000Z

86

E-Print Network 3.0 - alkaline earth cations Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the cation (alkaline, rare earth... to the cation size. Knowing that the size of rare earth elements and alkaline cations decreases in the following... of results on tungstate...

87

Cation Exchange and A1 Mobilization in Soils  

Science Journals Connector (OSTI)

Predicting the equilibria of cations distributed between soil solutions and exchange sites is a classical soil chemistry problem. Interest in such cation distribution problems has been motivated by a need to i...

D. D. Richter; D. W. Johnson; K. H. Dai

1992-01-01T23:59:59.000Z

88

Microsoft Word - cation-in-zeolite-natrolite  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Role of Cation-Water Disorder during Cation Exchange in Small-Pore Zeolite Sodium Natrolite Structural changes leading to disordering of the cationwater arrangement within the pores of zeolite natrolite while exchanging sodium (Na + ) with potassium (K + ) have been investigated using X-ray diffraction (XRD) and oxygen K-edge X-ray absorption spectroscopy (XAS). The most fundamental chemical property of zeolites is ion exchange. A detailed understanding of why and how ion exchange occurs is of tremendous importance for many industrial processes ranging from well-known water softening to environmental cleanup such as radionuclide storage. In the case of sodium natrolite, rubidium- or cesium- containing natrolites can only be made if Na + is first

89

Alkaline earth cation extraction from acid solution  

DOE Patents [OSTI]

An extractant medium for extracting alkaline earth cations from an aqueous acidic sample solution is described as are a method and apparatus for using the same. The separation medium is free of diluent, free-flowing and particulate, and comprises a Crown ether that is a 4,4'(5')[C.sub.4 -C.sub.8 -alkylcyclohexano]18-Crown-6 dispersed on an inert substrate material.

Dietz, Mark (Elmhurst, IL); Horwitz, E. Philip (Naperville, IL)

2003-01-01T23:59:59.000Z

90

Integrated Chemical Geothermometry System for Geothermal Exploration  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. Develop practical and reliable system to predict geothermal reservoir temperatures from integrated chemical analyses of spring and well fluids.

91

Plant rhamnogalacturonan II complexation of heavy metal cations  

DOE Patents [OSTI]

The present invention provides rhamnogalacturonan-II (RG-II) and relates to its ability to complex specific multivalent heavy metal cations. In the presence of boric acid, RG-II monomers form dimers that are cross-linked by a borate ester. The yield of such borate ester cross-linked dimers of RG-II is enhanced in the presence of specific heavy metal cations. The present invention further relates to the utility of RG-II in assays for the detection of specific heavy metal contamination; as a reagent useful in the removal of specific heavy metal cations contaminating foods and liquids, for example, fish, wines, etc.; as a pharmaceutical composition useful as an antidote in specific heavy metal cation poisoning; as a treatment for the detoxification of specific heavy metal cations from blood and/or tissues; and in a method of remediation of waters and soils contaminated with specific heavy metal cations.

O'Neill, Malcolm A. (Winterville, GA); Pellerin, Patrice J. M. (Montpellier, FR); Warrenfeltz, Dennis (Athens, GA); Vidal, Stephane (Combaillaux, FR); Darvill, Alan G. (Athens, GA); Albersheim, Peter (Athens, GA)

1999-01-01T23:59:59.000Z

92

Plant rhamnogalacturonan II complexation of heavy metal cations  

DOE Patents [OSTI]

The present invention provides rhamnogalacturonan-II (RG-II) and relates to its ability to complex specific multivalent heavy metal cations. In the presence of boric acid, RG-II monomers form dimers that are cross-linked by a borate ester. The yield of such borate ester cross-linked dimers of RG-II is enhanced in the presence of specific heavy metal cations. The present invention further relates to the utility of RG-II in assays for the detection of specific heavy metal contamination; as a reagent useful in the removal of specific heavy metal cations contaminating foods and liquids, for example, fish, wines, etc.; as a pharmaceutical composition useful as an antidote in specific heavy metal cation poisoning; as a treatment for the detoxification of specific heavy metal cations from blood and/or tissues; and in a method of remediation of waters and soils contaminated with specific heavy metal cations. 15 figs.

O`Neill, M.A.; Pellerin, P.J.M.; Warrenfeltz, D.; Vidal, S.; Darvill, A.G.; Albersheim, P.

1999-03-02T23:59:59.000Z

93

The Effect of Temperature, Cations, and Number of Acyl Chains...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(i.e., number of acyl chains), cation type, and temperature influence the phase transition, aggregate structure, and endotoxic activity of Lipid-A. We have applied an...

94

Charge Density of Divalent Metal Cations Determines RNA Stability  

E-Print Network [OSTI]

determined by a combination of counterion charge and the packing efficiency of condensed cations that depends RNAs that have regions of high negative potential interact even more strongly with counterions than of the phosphate charge arises from nonspecific condensation of counterions.4,10 The ionic radius of a metal cation

Thirumalai, Devarajan

95

CSE647: Testing and Veri cation (Fall 2000) Scott Stoller  

E-Print Network [OSTI]

CSE647: Testing and Veri#12;cation (Fall 2000) Scott Stoller Exam For every problem, you must whether it is possible, based only on the given information about S, to conclude that the speci#12;ed set is persistent in the speci#12;ed state. Your answer must be yes or no, followed by a justi#12;cation. Use

Stoller, Scott

96

Classi cation of Carbide Distributions using Scale-Space Methods Classi cation of Carbide Distributions using Scale  

E-Print Network [OSTI]

Classi cation of Carbide Distributions using Scale-Space Methods #12;Classi cation of Carbide-structure of the steel, which in turn in uences the mechanical properties. Speci - cally, the distribution of carbide is essential, since cracks propagate within the carbide agglomerations. In current quality control

Lindeberg, Tony

97

Cation Defects and Conductivity in Transparent Oxides  

SciTech Connect (OSTI)

High quality doped zinc oxide and mixed transition metal spinel oxide films have been deposited by means of sputter deposition from metal and metal oxide targets, and by spin casting from aqueous or alcoholic precursor solutions. Deposition conditions and post-deposition processing are found to alter cation oxidation states and their distributions in both oxide materials resulting in marked changes to both optical transmission and electrical response. For ZnO, partial reduction of the neat or doped material by hydrogen treatment of the heated film or by electrochemical processing renders the oxide n-type conducting. Continued reduction was found to diminish conductivity. In contrast, oxidation of the infrared transparent p-type spinel conductors typified by NiCo2O4 was found to increase conductivity. The disparate behavior of these two materials is caused in part by the sign of the charge carrier and by the existence of two different charge transport mechanisms that are identified as free carrier conduction and polaron hopping. While much work has been reported concerning structure/property relationships in the free carrier conducting oxides, there is a significantly smaller body of information on transparent polaron conductors. In this paper, we identify key parameters that promote conductivity in mixed metal spinel oxides and compare their behavior with that of the free carrier TCO’s.

Exarhos, Gregory J.; Windisch, Charles F.; Ferris, Kim F.; Owings, Robert R.

2007-10-24T23:59:59.000Z

98

Radical cations of sulfides and disulfides: An ESR study  

SciTech Connect (OSTI)

Exposure of dilute solutions of dimethylsulfide, methanethiol, tetrahydrothiophene, terbutyl and diterbutyl-sulfides, dimethyl-disulfide, and diterbutyldisulfide, in freon at 77 K to /sup 60/Co ..gamma.. rays gave the corresponding cations. From the reported ESR spectra, g tensors were obtained. It was found that both sulfide and disulfide cations exhibit the same g tensor: (g/sub max/ = 2.034 +- 0.002, g/sub int/ = 2.017 +- 0.001, g/sub min/ = 2.001 +- 0.005). From this result it has been shown that the disulfide cation is planar. This finding was supported by fully optimized geometry ab initio calculations.

Bonazzola, L.; Michaut, J.P.; Roncin, J.

1985-09-15T23:59:59.000Z

99

Cation Transport in Polymer Electrolytes: A Microscopic Approach  

E-Print Network [OSTI]

A microscopic theory for cation diffusion in polymer electrolytes is presented. Based on a thorough analysis of molecular dynamics simulations on PEO with LiBF$_4$ the mechanisms of cation dynamics are characterised. Cation jumps between polymer chains can be identified as renewal processes. This allows us to obtain an explicit expression for the lithium ion diffusion constant D_{Li} by invoking polymer specific properties such as the Rouse dynamics. This extends previous phenomenological and numerical approaches. In particular, the chain length dependence of D_{Li} can be predicted and compared with experimental data. This dependence can be fully understood without referring to entanglement effects.

A. Maitra; A. Heuer

2007-05-11T23:59:59.000Z

100

Radiation Stability of Cations in Ionic Liquids. 2. Charge Delocalization  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Stability of Cations in Ionic Liquids. 2. Improved Radiation Stability of Cations in Ionic Liquids. 2. Improved Radiation Resistance Through Charge Delocalization in 1-Benzylpyridinium Ilya A. Shkrob, Timothy W. Marin, Jasmine L. Hatcher, Andrew R. Cook, Tomasz Szreder and James F. Wishart J. Phys. Chem. B 117, Just Accepted (2013). [Find paper at ACS Publications]. Abstract: Hydrophobic room-temperature ionic liquids (ILs) hold promise as replacements for molecular diluents for processing of used nuclear fuel as well as for the development of alternative separations processes, provided that the solvent can be made resistant to ionizing radiation. We demonstrate that 1-benzylpyridinium cations are uniquely suited as radiation resistant cations due to the occurrence of charge delocalization both in their reduced and oxidized form in the ILs. It is suggested that

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Synthesis of Cationic Extended Frameworks for Anion-Based Applications  

E-Print Network [OSTI]

cationic layer derives from brucite Mg(OH) 2 , with edge-layer (Figure 1.1). Unlike brucite [Mg(OH) 2 ] forming aof structures based on brucite with a general formula [M 2+

Fei, Honghan

2012-01-01T23:59:59.000Z

102

Cation and Anion Exchange Properties of Pillared Clays  

Science Journals Connector (OSTI)

Cation and anion pH dependent exchange processes on an Aluminium Pillared Clay (Al-PILC) and Zirconium Pillared Clay (Zr-PILC) were studied by titrating the PILCS with...

A. Dyer; T. Gallardo

1990-01-01T23:59:59.000Z

103

Method for the chromatographic separation of cations from aqueous samples  

DOE Patents [OSTI]

An extraction chromatographic material is described for extracting metal cations from a liquid stream. The extraction chromatographic material is prepared by adsorbing a diesterified methanediphosphonic acid on an inert particulate support. 7 figs.

Horwitz, E.P.; Chiarizia, R.; Dietz, M.L.

1997-07-29T23:59:59.000Z

104

Method for the chromatographic separation of cations from aqueous samples  

DOE Patents [OSTI]

An extraction chromatographic material is described for extracting metal cations from a liquid stream. The extraction chromatographic material is prepared by adsorbing a diesterified methane-diphosphonic acid on an inert particulate support. 7 figs.

Horwitz, E.P.; Chiarizia, R.; Dietz, M.L.

1998-12-22T23:59:59.000Z

105

Role of cation choice in the radiation tolerance of pyrochlores...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

volume swelling of the track is 4%, which suggests that it is partially amorphous. Gd vacancies and Ti interstitials along with cation exchange play a role in damage accumulation...

106

Hydroxide Degradation Pathways for Substituted Trimethylammonium Cations: A DFT Study  

SciTech Connect (OSTI)

Substituted trimethylammonium cations serve as small molecule analogues for tetherable cations in anion exchange membranes. In turn, these membranes serve as the basis for alkaline membrane fuel cells by allowing facile conduction of hydroxide. As these cations are susceptible to hydroxide attack, they degrade over time and greatly limit the lifetime of the fuel cell. In this research, we performed density functional theory calculations to investigate the degradation pathways of substituted trimethylammonium cations to probe the relative durability of cation tethering strategies in alkyl and aromatic tethers. Our results show that significant changes in calculated energy barriers occur when substitution groups change. Specifically, we have found that, when available, the Hofmann elimination pathway is the most vulnerable pathway for degradation; however, this barrier is also found to depend on the carbon chain length and number of hydrogens susceptible to Hofmann elimination. S{sub N}2 barriers were also investigated for both methyl groups and substitution groups. The reported findings give important insight into potential tethering strategies for trimethylammonium cations in anion exchange membranes.

Long, H.; Kim, K.; Pivovar, B. S.

2012-05-03T23:59:59.000Z

107

Poly(3-decylthiophene) Radical Anions and Cations in Solution  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Poly(3-decylthiophene) Radical Anions and Cations in Solution: Single and Poly(3-decylthiophene) Radical Anions and Cations in Solution: Single and Multiple Polarons and Their Delocalization Lengths in Conjugated Polymers N. Takeda and J. R. Miller J. Phys. Chem. B 116, 14715-14723 (2012). [Find paper at ACS Publications] Abstract: Optical absorption spectra of anions and cations of poly(3-decylthiophene) (P3DT) in solution were identified as single polarons. Pulse radiolysis of P3DT in THF determined the spatial extent of one negative polaron to be similar to 11.5 thiophene units by observing transient absorption of P3DT(-dot) radical ions, which are prinicpally free ions, at 850 nm with epsilon = (7.25 ± 0.47) x 104 M-1 cm-1 and bleaching of the neutral absorption band at 450 nm. P3DT(-dot) was formed in a combination of diffusive reactions and fast "step" processes. Similarly, a positive

108

Comparison of Cation Adsorption by Isostructural Rutile and Cassiterite  

SciTech Connect (OSTI)

Macroscopic net proton charging curves for powdered rutile and cassiterite specimens with the (110) Crystal face predominant, as a function of pH in RbCl and NaCl solutions, trace SrCl2 in NaCl, and trace ZnCl2 in NaCl and Na Triflate solutions, are compared to corresponding molecular-level information obtained from static DFT optimizations and classical MD simulations, as well as synchrotron X-ray methods. The similarities and differences in the macroscopic charging behavior of rutile and cassiterite largely reflect the cation binding modes observed at the molecular level. Cation adsorption is primarily inner-sphere on both isostructural (110) surfaces, despite predictions that outer-sphere binding should predominate on low bulk dielectric constant oxides such as cassiterite ( bulk 11). Inner-sphere adsorption is also significant for Rb and Na on neutral surfaces, whereas Cl- binding is predominately outer-sphere. As negative surface charge increases, relatively more Rb , Na , and especially Sr2 are bound in highly desolvated tetradentate fashion on the rutile (110) surface, largely accounting for enhanced negative charge development relative to cassiterite. Charging curves in the presence of Zn2 are very steep but similar for both oxides, reflective of Zn2 hydrolysis (and accompanying proton release) during the adsorption process, and the similar binding modes for ZnOH on both surfaces. These results suggest that differences in cation adsorption between high and low bulk dielectric constant oxides are more subtly related to the relative degree of cation desolvation accompanying inner-sphere binding (i.e., more tetradentate binding on rutile), rather than distinct inner- and outer-sphere adsorption modes. Cation desolvation may be favored at the rutile (110) surface in part because inner-sphere water molecules are bound further from and less tightly than on the cassiterite (110) surface. Hence, their removal upon inner-sphere cation binding is relatively more favorable.

Machesky, Michael L. [Illinois State Water Survey, Champaign, IL; Wesolowski, David J [ORNL; Rosenqvist, Jorgen K [ORNL; Predota, M. [University of South Bohemia, Czech Republic; Vlcek, Lukas [ORNL; Ridley, Moira K [ORNL; Kohli, V [Oak Ridge National Laboratory (ORNL); Zhang, Zhan [Argonne National Laboratory (ANL); Fenter, Paul [Argonne National Laboratory (ANL); Cummings, Peter T [ORNL; Lvov, Serguei N. [Pennsylvania State University; Fedkin, Mark V [ORNL; Rodriguez-Santiago, V [Oak Ridge National Laboratory (ORNL); Kubicki, James D. [Pennsylvania State University; Bandura, Andrei V. [St. Petersburg State University, St. Petersburg, Russia

2011-01-01T23:59:59.000Z

109

Cationically polymerizable monomers derived from renewable sources. Annual performance report  

SciTech Connect (OSTI)

The objectives of this project are to design and synthesize novel monomers which orginate from renewable biological sources and to carry out their rapid, efficient, pollution-free and energy efficient cationic polymerization to useful products under the influence of ultraviolet light or heat. A summary of the results of the past year`s research on cationically polymerizable monomers derived from renewable sources is presented. Three major areas of investigation corresponding to the different classes of naturally occurring starting materials were investigated; epoxidized terpenes and natural rubber and vinyl ethers from alcohols and carbohydrates.

Crivello, J.V.

1992-10-01T23:59:59.000Z

110

Steam boiler control speci cation problem: A TLA solution  

E-Print Network [OSTI]

Steam boiler control speci cation problem: A TLA solution Frank Le ke and Stephan Merz Institut fur of the state of the steam boiler, detect failures, and model message transmission. We give a more detailed between the physi- cal state of the steam boiler and the model maintained by the controller and discuss

111

Verifying SCR Requirements Speci cations Using State Exploration  

E-Print Network [OSTI]

Verifying SCR Requirements Speci cations Using State Exploration In Proc. First ACM SIGPLAN as the SCR Software Cost Reduction method, to specify the requirements of software systems using ta- bles. NRL has developed a formal state machine model de ning the SCR semantics and support tools for anal

112

SHORT COMMUNICATION An In Situ Silver Cationization Method  

E-Print Network [OSTI]

desorption of perflu- orinated polyethers (PFPEs), and used a second laser to ablate a plume of metal ions the forma- tion of metal ion adducts by mixing metal salts into the matrix they used to perform SIMS [5 from the sample substrate to form metal cation adducts [7]. Kahr and Wilkins used a layer of silver

de Vries, Mattanjah S.

113

ORBIT -Operating-Regime-Based Modeling and Identi cation Toolkit  

E-Print Network [OSTI]

projects. The MATLAB-based software tool is called ORBIT (Operating-Regime-Based modeling and Identi cation, Norway. ORBIT is a MATLAB-based toolkit for black-box and grey-box mod- eling of non-linear dynamic feature of ORBIT, compared for example to the MATLAB Fuzzy Logic Toolbox, is the strong focus

Foss, Bjarne A.

114

Towards an Algebraic Speci cation of the Java Virtual Machine  

E-Print Network [OSTI]

Towards an Algebraic Speci cation of the Java Virtual Machine K Stephenson Department of Computer of the architecture of an abstract and simpli ed version of the Java Virtual Machine JVM. This concentration on the implementation-independent features of the machine allows us to build a clean and easily comprehensible model

Grant, P. W.

115

Webbi cation of Network Karim El Guemhioui and Raouf Boutaba  

E-Print Network [OSTI]

Webbi cation of Network Management Karim El Guemhioui and Raouf Boutaba Computer Science Research) 840 - 1235 Ext. 5736, Fax: (514) 840 - 1244 e-mail: kelguemh@crim.ca ABSTRACT| Network management to the success of many organizations. The existing heterogeneity of platforms and the proliferation of approaches

El Guemhioui, Karim

116

Effect of Cations on Activation of Bacillus popilliae Spores  

Science Journals Connector (OSTI)

...not affected by so- dium, cesium, or lithium. Divalent cations may be required for...tors was also compared by adding an excess of either compound to suspensions of spores...Effect on the viable count ofadding excess KCI or EDTA to spores being heated in...

D. F. Splittstoesser; D. F. Farkas

1966-10-01T23:59:59.000Z

117

Diffusion in single crystals of melilite: 2. Cations  

SciTech Connect (OSTI)

Diffusion coefficients of divalent cations, Ni, Co, Fe, Mn, Ca, Sr, and Ba, in synthetic akermanite were determined by tracer-diffusion experiments. Diffusion coefficients of cation paris, Al + Al-Mg + Si, Al + Al-Co + Si, and Mg-Co in melilite solid-solution systems, were determined by coupled annealing of synthetic melilites of endmember compositions. Cobalt tracer diffuses slower along the c-crystallographic axis than along the a-axis by a factor of about three, possibly due to the anisotropic sheet-like arrangement of oxygen ions parallel to the (001) plane which is perpendicular to the c-axis in the crystal structure of melilite. In the coupled diffusion experiments, the cation pairs interdiffuse complementary, as expected for conservation of material and ionic charge balance in the substitution. The observed trend in the inter-diffusion coefficient vs. melting temperature relations is similar to those observed for alloys and consistent with an empirical rule for self-diffusion coefficient-melting temperature relation. In the diffusion coefficient vs. ionic radius diagram for divalent cation diffusion in akermanite, smooth curves were observed as in the case of olivine systems. However, the shapes of the curves were significantly different from those observed in olivine systems. The observed trend of diffusion coefficients with ionic radius can be explained on the basis of crystal structure-controlled diffusion in akermanite.

Morioka, Masana (Univ. of Tokyo Yayoi (Japan)); Nagasawa, Hiroshi (Gakushiun Univ. Mejiro, Tokyo (Japan))

1991-03-01T23:59:59.000Z

118

Compilation of quasi-destructive uni cation of type feature structures  

E-Print Network [OSTI]

on the LIGHT system concerns its extension so to achieve compilation of destructive uni#12;cation of FSs #18;a two stages. First, during uni#12;cation, modi#12;ed nodes in the two (rooted) FSs are marked so

Bennett, Brandon

119

Hydrogel with high laponite content as nanoclay: swelling and cationic dye adsorption properties  

Science Journals Connector (OSTI)

For the removal of cationic dyes, polymer hydrogels and their composites have been employed because of their unique ... Recently, some researchers used clay-filled hydrogel composites for the removal of cationic ...

Gholam Bagheri Marandi; Maryam Baharloui…

2014-09-01T23:59:59.000Z

120

Compound and Elemental Analysis At Lassen Volcanic National Park...  

Open Energy Info (EERE)

but are within the 220-240 degrees C range calculated using cation, sulfate-water isotope, and mixing model geothermometers (Muffler et al., 1982). In Table 1,we include many...

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Organo-Lewis acid as cocatalyst for cationic homogeneous Ziegler-Natta olefin polymerizations  

DOE Patents [OSTI]

A cationic metallocene complex with trisperfluorobiphenyl borate is described for use as a polymerization catalyst. 7 figs.

Marks, T.J.; Chen, Y.X.

1999-01-05T23:59:59.000Z

122

An Algebraic Speci cation of the Steam-Boiler Control System  

E-Print Network [OSTI]

An Algebraic Speci#12;cation of the Steam-Boiler Control System Michel Bidoit 1 , Claude Chevenier describe how to derive an algebraic speci#12;cation of the Steam-Boiler Control System starting from to specify the detection of the steam-boiler fail- ures. Finally we discuss validation and veri#12;cation

Bidoit, Michel

123

PHYSICAL REVIEW B 88, 174102 (2013) Positron lifetime measurements of hydrogen passivation of cation vacancies  

E-Print Network [OSTI]

of cation vacancies in yttrium aluminum oxide garnets F. A. Selim,1,* C. R. Varney,1 M. C. Tarun,1 M. C; published 4 November 2013) A charge compensation mechanism is proposed for cation vacancy defects in complex trapping was detected in samples grown in H2. This is attributed to decoration of cation vacancies

McCluskey, Matthew

124

Characterization of Selective Binding of Alkali Cations with Carboxylate  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Characterization of Selective Characterization of Selective Binding of Alkali Cations with Carboxylate Characterization of Selective Binding of Alkali Cations with Carboxylate Print Wednesday, 24 September 2008 00:00 During its lifetime, a cell spends a considerable fraction of its energy pumping sodium and calcium out and potassium in. This balancing process is similar to that found in the coils of the DNA double helix, where specific ions nestle and help stabilize this macromolecule. These are only two examples of selective ion interactions in biology; there are many others also vital to life. The existence of these interactions has been known since the early 20th century, when Franz Hofmeister observed that some salts (ionic compounds) aided the solution of proteins in egg, some caused proteins to destabilize and precipitate, and others ranged in activity between the two extremes. Hofmeister then ranked "salt-out" (destabilizing) ions versus "salt-in" (stabilizing) ions according to the magnitude of their effects (the "Hofmeister effects"). However, despite enormous effort, why certain interactions are preferred over others is not completely understood. Recently, a team of researchers from UC Berkeley used the model systems of acetate and formate (two simple carboxylic acids) with a series of cations to test predictions made in the literature for preferential interactions. Near-edge x-ray absorption fine structure (NEXAFS) spectroscopy was used as this technique is highly sensitive to the chemical environments around a molecule. Experiments at ALS Beamline 8.0.1 confirmed strengthening of the interaction between the cations and the carboxylate group in the following order: potassium, sodium, and lithium.

125

EXAFS Determination of Cation Local Order in Layered Perovskites  

SciTech Connect (OSTI)

EXAFS analysis of Bi{sub 6}Ti{sub 3}Fe{sub 2}O{sub 18} Aurivillius ceramic was performed to elucidate the local environment of Fe cations. Experiments were performed at Stanford Synchrotron Radiation Laboratory, at T = 10, 30, 50, 75, 100 and 298 K, in fluorescence regime. EXAFS spectra were processed using the ab initio multiple scattering program FEFF6. Distances among representative atomic pairs were refined. As a basic result, the previous hypothesis suggested by X-ray diffraction experiments, regarding a preference of iron atoms for the centered perovskite layer of the unit cell, was confirmed.

Montero-Cabrera, M.E.; Garcia-Guaderrama, M.; Mehta, A.; Webb, S.; Fuentes-Montero, L.; Moller, J.A.D.; Fuentes-Cobas, L.; /Autonoma U., Chihuahua /SLAC, SSRL

2009-06-05T23:59:59.000Z

126

Controlled Doping of Transition Metal Cations in Alumina Pillared Clays  

Science Journals Connector (OSTI)

First, calcined Al-PILC was dispersed into an aqueous solution of sodium or ammonium ions. ... The ion-doped Al-PILC was then exchanged with an aqueous solution of transition metal salt at a pH of ?4.5 to replace Na+ or NH4+ ions by transition metal cations. ... Analytical techniques such as atomic absorption spectroscopy, X-ray diffraction, diffuse reflectance?ultraviolet?visible spectroscopy, as well as N2 adsorption were used to characterize the PILC products with and without the loading of metal ions. ...

H. Y. Zhu; Z. H. Zhu; G. Q. Lu

2000-05-31T23:59:59.000Z

127

E-Print Network 3.0 - a-site cation deficiency Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collection: Mathematics 2 Cation non-stoichiometry in yttrium-doped barium zirconate: phase behavior, microstructure, and proton conductivity Summary: -site. The alternative...

128

E-Print Network 3.0 - abts radical cation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

abts radical cation Page: << < 1 2 3 4 5 > >> 1 2-Aminobenzothiazole degradation by free and Ca-alginate immobilized cells of Rhodococcus rhodochrous Summary: , Chisinau,...

129

Geothermometry At Long Valley Caldera Geothermal Area (Mariner...  

Open Energy Info (EERE)

California Michael L. Sorey, Gene A. Suemnicht, Neil C. Sturchio, Gregg A. Nordquist (December 1991) New Evidence On The Hydrothermal System In Long Valley Caldera, California,...

130

Geothermometry At Long Valley Caldera Geothermal Area (Farrar...  

Open Energy Info (EERE)

each water sample were measured in the field within minutes following collection. Field processing of water samples was conducted in accordance with standard USGS protocols...

131

Geothermometry At Long Valley Caldera Geothermal Area (Sorey...  

Open Energy Info (EERE)

studies, and seem to prove useful in most cases (Flexser, 1991; Goff et al., 1991; Smith and Suemnicht, 1991). Results from these studies are also summarized in Sorey et al....

132

Geothermometry At Roosevelt Hot Springs Geothermal Area (Ward...  

Open Energy Info (EERE)

Area. References S. H. Ward, W. T. Parry, W. P. Nash, W. R. Sill, K. L. Cook, R. B. Smith, D. S. Chapman, F. H. Brown, J. A. Whelan, J. R. Bowman (1978) A Summary of the...

133

Geothermometry At Lassen Volcanic National Park Area (Thompson...  

Open Energy Info (EERE)

Usefulness not indicated DOE-funding Unknown References J. Michael Thompson (1985) Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Volcanic National Park...

134

Isotope Geothermometry At Lightning Dock Geothermal Area (Witcher...  

Open Energy Info (EERE)

Number DE-FC07-00AL66977 Notes This project deepened a well and took 4 samples from wells around the Lightning Docks KGRA and performed extensive chamical and isotope analysis...

135

Geothermometry At Mt St Helens Area (Shevenell & Goff, 1995)...  

Open Energy Info (EERE)

Fraser Goff (1995) Evolution Of Hydrothermal Waters At Mount St Helens, Washington, Usa Additional References Retrieved from "http:en.openei.orgwindex.php?titleGeothermom...

136

ENERGY COMMISSION APPL.lCATION FOR SOURCE MATERIAL LICENSE  

Office of Legacy Management (LM)

COMMISSION COMMISSION APPL.lCATION FOR SOURCE MATERIAL LICENSE Pursuant to the rcgu!ations in Title 10, Code of Federal Regulations, Chapter 1, Part 40, application is hereby made for a license to receive, possess, use, transfer, deliver or import into the United Stat-, source material for the activity or activities described. 1. (check ooa) 2. NAME OF APPLICANT W. R. GRACE 6 Co. 0 (a) New Iicense 0 (b) Amendment to License No.- Davison Chemical Division STA-422 3. Q (c) Renewal of Licensr No. 0 (d) Previous License No. Pompton Plains, N. J. 4. ST,.TE THE AOORESS(ES) AT WHICH SOURCE MATERIAL WILL BE POSSESSED OR USED 868 Black Oak Ridge Road, Wayne, fi. J. a*ocY s up/'l File IF 5. BUSINESS OR OCCUPATION I 6. (a) IF APPLICANT IS AN INDIVIDUAL. STATE CITIZENSHIP

137

Lithium-cation conductivity and crystal structure of lithium diphosphate  

SciTech Connect (OSTI)

The electrical conductivity of lithium diphosphate Li{sub 4}P{sub 2}O{sub 7} has been measured and jump-like increasing of ionic conductivity at 913 K has been found. The crystal structure of Li{sub 4}P{sub 2}O{sub 7} has been refined using high temperature neutron diffraction at 300–1050 K. At 913 K low temperature triclinic form of Li{sub 4}P{sub 2}O{sub 7} transforms into high temperature monoclinic one, space group P2{sub 1}/n, a=8.8261(4) Å, b=5.2028(4) Å, c=13.3119(2) Å, ?=104.372(6)°. The migration maps of Li{sup +} cations based on experimental data implemented into program package TOPOS have been explored. It was found that lithium cations in both low- and high temperature forms of Li{sub 4}P{sub 2}O{sub 7} migrate in three dimensions. Cross sections of the migrations channels extend as the temperature rises, but at the phase transition point have a sharp growth showing a strong “crystal structure – ion conductivity” correlation. -- Graphical abstract: Crystal structure of Li{sub 4}P{sub 2}O{sub 7} at 950 K. Red balls represent oxygen atoms; black lines show Li{sup +} ion migration channels in the layers perpendicular to [001] direction. Highlights: • Structure of Li{sub 4}P{sub 2}O{sub 7} has been refined using high temperature neutron diffraction. • At 913 K triclinic form of Li{sub 4}P{sub 2}O{sub 7} transforms into high temperature monoclinic one. • The migration maps of Li{sup +} implemented into program package TOPOS have been explored. • Cross sections of the migrations channels at the phase transition have a sharp growth.

Voronin, V.I., E-mail: voronin@imp.uran.ru [Institute of Metal Physics Urals Branch RAS, S.Kovalevskoy Street 18, 620041 Ekaterinburg (Russian Federation); Sherstobitova, E.A. [Institute of Metal Physics Urals Branch RAS, S.Kovalevskoy Street 18, 620041 Ekaterinburg (Russian Federation); Blatov, V.A., E-mail: blatov@samsu.ru [Samara Center for Theoretical Materials Science (SCTMS), Samara State University, Ac.Pavlov Street 1, 443011 Samara (Russian Federation); Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589 (Saudi Arabia); Shekhtman, G.Sh., E-mail: shekhtman@ihte.uran.ru [Institute of High Temperature Electrochemistry Urals Branch RAS, Akademicheskaya 20, 620990 Ekaterinburg (Russian Federation)

2014-03-15T23:59:59.000Z

138

Geothermal Literature Review At Teels Marsh Area (Shevenell, Et Al., 2008)  

Open Energy Info (EERE)

Teels Marsh Area (Shevenell, Et Al., 2008) Teels Marsh Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Geothermal Literature Review At Teels Marsh Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Teels Marsh Area Exploration Technique Geothermal Literature Review Activity Date Usefulness useful DOE-funding Unknown Notes In conjunction with field checking of the borate crusts, existing databases were consulted and a cold spring was found in the literature at Teels Marsh that had a geochemical analysis. Geothermometry from this analysis predicted anomalous subsurface temperatures of 192degrees C (Mg-corrected Na-K-Ca geothermometer) and 118degrees C (quartz geothermometer). References Lisa Shevenell, Mark Coolbaugh, Chris Sladek, Rick Zehner, Chris

139

Re ning Abstract Machine Speci cations of the Steam Boiler Control to Well Documented  

E-Print Network [OSTI]

Re ning Abstract Machine Speci cations of the Steam Boiler Control to Well Documented Executable the steam boiler control speci cation problem to il- lustrate how the evolving algebra approach to the speci, in June 1995, to control the Karlsruhe steam boiler simulator satisfactorily. The abstract machines

Börger, Egon

140

Veri cation Techniques for LOTOS U. Martin, University of St. Andrews, Scotland, U.K.  

E-Print Network [OSTI]

to safety-critical case studies, determined the veri cation needs of real life applications, and developed of the veri cation and validation requirements which were considered in the project. Software de- velopment in safety-critical application areas in collab- oration with researchers from end user organisations

Calder, Muffy

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Gas-phase ion/ion reactions of transition metal complex cations with multiply charged oligodeoxynucleotide anions  

Science Journals Connector (OSTI)

Multiply deprotonated hexadeoxyadenylate anions, (A6?nH)n?, where n...=3–5, have been subjected to reaction with a range of divalent transition-metal complex cations in the gas phase. The cations studied included...

Christopher K. Barlow; Brittany D. M. Hodges…

2008-02-01T23:59:59.000Z

142

Logic Based Approaches to Work ow Modeling and Veri cation 1 Saikat Mukherjee, Hasan Davulcu, Michael Kifer, Pinar Senkul,  

E-Print Network [OSTI]

Contents Logic Based Approaches to Work ow Modeling and Veri#12;cation 1 Saikat Mukherjee, Hasan : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 37 #12; #12; Logic-Based Approaches to Work ow Modeling and Veri#12;cation Saikat Mukherjee, 1 Hasan

Yang, Guizhen

143

Exploratory Studies on Reactions of Cobaloxime ?-Cations with C-Nucleophiles:? Irreversible Alkene Decomplexation versus Nucleophilic Capture  

Science Journals Connector (OSTI)

(?-Hydroxyalkyl)- and (?-acetoxyalkyl)cobaloximes can undergo facile acid-catalyzed ?-heteroatom exchange with oxygen and nitrogen nucleophiles in an SN1-like mechanism via cationic metal?alkene ?-complex intermediates (cobaloxime ?-cations). The reaction ...

Jennifer L. Gage; Bruce P. Branchaud

1996-02-09T23:59:59.000Z

144

Pinning lattice: Effect of rhenium doping on the microstructural evolution from Tl-2212 to Hg-1212 films during cation exchange  

E-Print Network [OSTI]

In a cation exchange process developed recently by some of us, epitaxial HgBa2CaCu2O6 films can be obtained by diffusing volatile Tl cations out of, and simultaneously diffusing Hg cations into, the crystalline lattice of ...

Wu, Judy; Zhao, H.

2004-08-15T23:59:59.000Z

145

Cation disorder in high dose neutron irradiated spinel  

SciTech Connect (OSTI)

The crystal structures of MgAl{sub 2}O{sub 4} spinel single crystals irradiated to high neutron fluences (>5{center_dot}10{sup 26} n/m{sup 2} (E{sub n}>0.1 MeV)), were examined by neutron diffraction. Crystal structure refinement of the highest dose sample indicated that the average scattering strength of the tetrahedral crystal sites decreased by {approximately}20% while increasing by {approximately}8% on octahedral sites. Since the neutron scattering length for Mg is considerably larger than for Al, this result is consistent with site exchange between Mg{sup 2+} ions on tetrahedral sites and Al{sup 3+} ions on octahedral sites. Least squares refinements also indicated that in all irradiated samples, at least 35% of Mg{sup 2+} and Al{sup 3+} ions in the crystal experienced disordering replacements. This retained dpa on the cation sublattices is the largest retained damage ever measured in an irradiated spinel material.

Sickafus, K.E.; Larson, A.C.; Yu, N.; Nastasi, M. [Los Alamos National Lab., NM (United States); Hollenberg, G.W.; Garner, F.A. [Pacific Northwest Lab., Richland, WA (United States); Bradt, R.C. [Univ. of Nevada, Reno, NV (United States)

1994-06-01T23:59:59.000Z

146

Cation disorder in high-dose, neutron-irradiated spinel  

SciTech Connect (OSTI)

The objective of this effort is to determine whether MgAl{sub 2}O{sub 4} spinel is a suitable ceramic for fusion applications. Here, the crystal structures of MgAl{sub 2}O{sub 4} spinel single crystals irradiated to high neutron fluences [>5{center_dot}10{sup 26} n/m{sup 2} (E{sub n} > 0.1 MeV)] were examined by neutron diffraction. Crystal structure refinement of the highest dose sample indicated that the average scattering strength of the tetrahedral crystal sites decreased by {approximately} 20% while increasing by {approximately} 8% on octahedral sites. Since the neutron scattering length for Mg is considerably larger than for Al, this results is consistent with site exchange between Mg{sup 2+} ions on tetrahedral sites and Al{sup 3+} ions on octahedral sites. Least-squares refinements also indicated that, in all irradiated samples, at least 35% of Mg{sup 2+} and Al{sup 3+} ions in the crystal experienced disordering replacements. This retained dpa on the cation sublattices is the largest retained damage ever measured in an irradiated spinel material.

Sickafus, K.E.; Larson, A.C.; Yu, N.; Nastasi, M. [Los Alamos National Lab., NM (United States); Hollenberg, G.W.; Garner, F.A. [Pacific Northwest Lab., Richland, WA (United States); Bradt, R.C. [Univ. of Nevada, Reno, NV (United States)

1994-08-01T23:59:59.000Z

147

Adsorption of Ethylene on Neutral, Anionic and Cationic Gold Clusters  

E-Print Network [OSTI]

The adsorption of ethylene molecule on neutral, anionic and cationic gold clusters consisting of up to 10 atoms has been investigated using density-functional theory. It is demonstrated that C2H4 can be adsorbed on small gold clusters in two different configurations, corresponding to the pi- and di-sigma-bonded species. Adsorption in the pi-bonded mode dominates over the di-sigma mode over all considered cluster sizes n, with the exception of the neutral C2H4-Au5 system. A striking difference is found in the size-dependence of the adsorption energy of C2H4 bonded to the neutral gold clusters in the pi and di-sigma configurations. The important role of the electronic shell effects in the di-sigma mode of ethylene adsorption on neutral gold clusters is demonstrated. It is shown that the interaction of C2H4 with small gold clusters strongly depends on their charge. The typical shift in the vibrational frequencies of C2H4 adsorbed in the pi- and the di-sigma configurations gives a guidance to experimentally disti...

Lyalin, Andrey

2009-01-01T23:59:59.000Z

148

Factors Affecting the Fragmentation of Peptide Ions: Metal Cationization and Fragmentation Timescale  

E-Print Network [OSTI]

The factors affecting peptide fragmentation have been extensively studied in the literature in order to better predict the fragment ion spectra of peptides and proteins. While there are countless influences to consider, metal cation binding...

Kmiec, Kevin

2012-10-19T23:59:59.000Z

149

Synthesis and Evaluation of a New Cationic Surfactant for Oil-Well Drilling Fluid  

Science Journals Connector (OSTI)

A new additive cationic surfactant for drilling fluid was synthesized by alkylation of coal ... results when utilized in the formulation of both oil-based mud and synthetic-based mud as...

Soad A. Mahmoud; Mona M. Dardir

2011-01-01T23:59:59.000Z

150

Synthesis and Properties of Novel Cationic, Temperature-Sensitive Block-Copolymers  

E-Print Network [OSTI]

Facile, one-step synthesis of self-assembling, cationic block copolymers of poly(2-N-(dimethylaminoethyl) methacrylate) (pDMAEMA) and PEO-PPO-PEO (Pluronic®) is developed. The copolymers are obtained via free-radical ...

Deshmukh, Smeet

151

The effect of trivalent cations on the major lower mantle silicates  

E-Print Network [OSTI]

I have investigated the effect of composition, especially ferric iron and aluminum, on the equations of state and phase stability of perovskite and post-perovskite. The presence of trivalent cations decreases the bulk ...

Catalli, Krystle Carina

2011-01-01T23:59:59.000Z

152

Cation exchange at the secondary building units of metal–organic frameworks  

E-Print Network [OSTI]

Cation exchange is an emerging synthetic route for modifying the secondary building units (SBUs) of metal–organic frameworks (MOFs). This technique has been used extensively to enhance the properties of nanocrystals and ...

Brozek, Carl Kavanaugh

153

A Reduction for Automated Veri cation of Authentication Scott D. Stoller  

E-Print Network [OSTI]

A Reduction for Automated Veri cation of Authentication Protocols Scott D. Stoller Computer Science of those case studies were not rigorously justi ed. Reduction theorems are needed, which show

Stoller, Scott

154

Adsorption and viscoelastic properties of cationic xylan on cellulose film using QCM-D  

Science Journals Connector (OSTI)

The adsorption and viscoelastic properties of cationic xylan layers adsorbed from an aqueous electrolyte solution ... 10, 100 mM) on a cellulose model surface were studied using quartz crystal microbalance with ....

Sang Hoon Lee; Hak Lae Lee; Hye Jung Youn

2014-06-01T23:59:59.000Z

155

Mucoadhesive Sustained Drug Delivery System Based on Cationic Polymer and Anionic Cyclodextrin/Triclosan Complex  

Science Journals Connector (OSTI)

In this study the interactions between a cationic polymer and an anionic cyclodextrin were investigated. The system has the potential for use in a sustained release dosage forms for use on mucous membranes. As mu...

Hakon H. Sigurdsson; Elin Knudsen…

2002-12-01T23:59:59.000Z

156

Determining the Mechanisms of Cationic Contamination Affecting PEMFCs Using a Strip Cell Configuration  

SciTech Connect (OSTI)

Cationic contamination of polymer electrolyte fuel cells has been shown to cause serious performance degradation but the exact mechanisms of this degradation are not fully understood. A strip cell configuration was devised to study the mechanisms of performance degradation due to cationic contamination by changing the time and length scales of traditional fuel cells while providing a suitable reference electrode. This 'strip cell' configuration utilizes traditional Nafion{reg_sign} membranes in an in-plane configuration with electrodes painted on each end. Using this cell it was determined that cationic contaminants collect near the cathode of the fuel cell under load and that this profile leads to increased losses primarily in the cathode region. These results can be directly related to performance losses in a typical PEMFC contaminated by foreign cations.

Kienitz, B. L.; Zawodzinski, T. A.; Pivovar, B. S.; Garzon, F. H.

2008-01-01T23:59:59.000Z

157

Relationships between Structure and Alkaline Stability of Imidazolium Cations for Fuel Cell Membrane Applications  

Science Journals Connector (OSTI)

Relationships between Structure and Alkaline Stability of Imidazolium Cations for Fuel Cell Membrane Applications ... Samuel C. Price *, Kristen S. Williams , and Frederick L. Beyer ... membranes (fueled with H or MeOH) and also to identify candidate alk. ...

Samuel C. Price; Kristen S. Williams; Frederick L. Beyer

2014-01-16T23:59:59.000Z

158

NMR Studies of Heat-Induced Transitions in Structure and Cation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in Structure and Cation Binding Environments of a Strontium-Saturated Swelling Mica. Abstract: In this work we combined Al, Si, F, and Na magic-angle spinning (MAS) nuclear...

159

Effect of cosolvent NMP on properties of cationic fluorocarbon emulsifier-free emulsion  

Science Journals Connector (OSTI)

In order to supplement the general way of preparing CFE, this paper was dedicated to a novel ... method—the cationic fluorocarbon emulsifier-free emulsion (CFE)—an organic cosolvent method, which is...12]. Genera...

Chen Wang; Xiaorui Li; Peizhi Li

2013-05-01T23:59:59.000Z

160

The temperature dependence of diffusion for several electroactive cations in nafion films at electrode surfaces  

E-Print Network [OSTI]

that the ratio n+ (n-1)+ D /D can be used to indicate the types of interactions app app occuring between the electroactive cation and the Nafion matrix (hydrophobic or hydrophilic interactions). +3 + 2 Activation Parameters for Charge Transfer of Ruf... that the ratio n+ (n-1)+ D /D can be used to indicate the types of interactions app app occuring between the electroactive cation and the Nafion matrix (hydrophobic or hydrophilic interactions). +3 + 2 Activation Parameters for Charge Transfer of Ruf...

Dollard, Kathleen

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Interactions between acidic polysaccharides and trivalent cations: their effect on intestinal dietary cholesterol absorption  

E-Print Network [OSTI]

INTERACTIONS BETHEL? ACIDIC POLYSACCHARIDES AND TRIVALPKT CATIONS) THEIR EFFECT ON INTVSTINAL DIETARY CHOLESTEROL ABSORPTION A Thesis Elizabeth Louise Bradbury Submitted to the Graduate College of' Texas AAM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1978 Eager Subgeotz Biochemistry &TERACTIONS BETWEEN ACIDIC POLYSACCHARIDES AND TRIVALENT CATIONS t THEIR EFFECT ON INTESTINAL DIETARY CHOLESTEROL kM~ORPTION A Thesis Elisabeth louise Bradbury...

Bradbury, Elizabeth Louise

2012-06-07T23:59:59.000Z

162

Colloid Facilitated Transport of Radioactive Cations in the Vadose Zone: Field Experiments Oak Ridge  

SciTech Connect (OSTI)

The overarching goal of this study was to improve understanding of colloid-facilitated transport of radioactive cations through unsaturated soils and sediments. We conducted a suite of laboratory experiments and field experiments on the vadose-zone transport of colloids, organic matter, and associated contaminants of interest to the U.S. Department of Energy (DOE). The laboratory and field experiments, together with transport modeling, were designed to accomplish the following detailed objectives: 1. Evaluation of the relative importance of inorganic colloids and organic matter to the facilitation of radioactive cation transport in the vadose zone; 2. Assessment of the role of adsorption and desorption kinetics in the facilitated transport of radioactive cations in the vadose zone; 3. Examination of the effects of rainfall and infiltration dynamics and in the facilitated transport of radioactive cations through the vadose zone; 4. Exploration of the role of soil heterogeneity and preferential flow paths (e.g., macropores) on the facilitated transport of radioactive cations in the vadose zone; 5. Development of a mathematical model of facilitated transport of contaminants in the vadose zone that accurately incorporates pore-scale and column-scale processes with the practicality of predicting transport with readily available parameters.

James E. Saiers

2012-09-20T23:59:59.000Z

163

Equilibrium Model for Ion Exchange Between Multivalent Cations and Zeolite-A in a Molten Salt  

SciTech Connect (OSTI)

A two-site equilibrium model that previously only accommodated monovalent cations has been extended to include divalent and trivalent cations for ion exchange between zeolite-A and molten chloride salts, a process being considered for concentrating nuclear fission products into high level waste forms. Equilibrium constants were determined by fitting the model to equilibrium data sets for ion exchange between zeolite-A and Cs ternary salt (CsCl-LiCl-KCl), Rb ternary salt (RbCl-LiCl-KCl), Na ternary salt (NaCl-LiCl-KCl), Sr ternary salt (SrCl2-LiCl-KCl), and U ternary salt (UCl3-LiCl-KCl). The results reveal a good fit between the experimental data sets and the model. The two ion exchange sites, framework sites and occluded sites, demonstrate different relative selectivities for the cations. It was found that Sr2_ is the preferred cation in the ion exchange site, and Cs_ is the preferred cation in the occlusion site. Meanwhile, Li_ has the highest combined selectivity when both ion exchange and occlusion sites are considered. Interestingly, divalent and trivalent species are more preferred in the ion exchange site than the monovalent species with the exception of Li_.

Supathorn Phongikaroon; Michael Simpson

2005-10-01T23:59:59.000Z

164

One Water Molecule Stabilizes the Cationized Arginine Matthew F. Bush, James S. Prell, Richard J. Saykally, and Evan R. Williams*  

E-Print Network [OSTI]

One Water Molecule Stabilizes the Cationized Arginine Zwitterion Matthew F. Bush, James S. Prell, Richard J. Saykally, and Evan R. Williams* Contribution from the Department of Chemistry, Uni

Cohen, Ronald C.

165

Mathematical Modeling of Cation Contamination in a Proton-exchange Membrane  

SciTech Connect (OSTI)

Transport phenomena in an ion-exchange membrane containing both H+ and K+ are described using multicomponent diffusion equations (Stefan-Maxwell). A model is developed for transport through a Nafion 112 membrane in a hydrogen-pump setup. The model results are analyzed to quantify the impact of cation contamination on cell potential. It is shown that limiting current densities can result due to a decrease in proton concentration caused by the build-up of contaminant ions. An average cation concentration of 30 to 40 percent is required for appreciable effects to be noticed under typical steady-state operating conditions.

Weber, Adam; Delacourt, Charles

2008-09-11T23:59:59.000Z

166

Cationic and Thiol–Ene Photopolymerization upon Red Lights Using Anthraquinone Derivatives as Photoinitiators  

Science Journals Connector (OSTI)

One of them (Oil Blue N) that is particularly efficient for cationic, IPN, and thiol–ene polymerization upon red lights (laser diode at 635 nm or household red LED bulb at 630 nm) belongs to the very few systems available at this long wavelength in such experimental conditions (low light intensity in the 10–100 mW/cm2 range). ... The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, and electron spin resonance spin trapping techniques. ... Copper Complexes in Radical Photoinitiating Systems: Applications to Free Radical and Cationic Polymerization upon Visible LEDs ...

Pu Xiao; Frédéric Dumur; Bernadette Graff; Jean Pierre Fouassier; Didier Gigmes; Jacques Lalevée

2013-08-22T23:59:59.000Z

167

Radiation induced redox reactions and fragmentation of constituent ions in ionic liquids II. Imidazolium cations.  

SciTech Connect (OSTI)

In part 1 of this study, radiolytic degradation of constituent anions in ionic liquids (ILs) was examined. The present study continues the themes addressed in part 1 and examines the radiation chemistry of 1,3-dialkyl substituted imidazolium cations, which currently comprise the most practically important and versatile class of ionic liquid cations. For comparison, we also examined 1,3-dimethoxy- and 2-methyl-substituted imidazolium and 1-butyl-4-methylpyridinium cations. In addition to identification of radicals using electron paramagnetic resonance spectroscopy (EPR) and selective deuterium substitution, we analyzed stable radiolytic products using {sup 1}H and {sup 13}C nuclear magnetic resonance (NMR) and tandem electrospray ionization mass spectrometry (ESMS). Our EPR studies reveal rich chemistry initiated through 'ionization of the ions': oxidation and the formation of radical dications in the aliphatic arms of the parent cations (leading to deprotonation and the formation of alkyl radicals in these arms) and reduction of the parent cation, yielding 2-imidazolyl radicals. The subsequent reactions of these radicals depend on the nature of the IL. If the cation is 2-substituted, the resulting 2-imidazolyl radical is relatively stable. If there is no substitution at C(2), the radical then either is protonated or reacts with the parent cation forming a C(2)-C(2) {sigma}{sigma}*-bound dimer radical cation. In addition to these reactions, when methoxy or C{sub {alpha}}-substituted alkyl groups occupy the N(1,3) positions, their elimination is observed. The elimination of methyl groups from N(1,3) was not observed. Product analyses of imidazolium liquids irradiated in the very-high-dose regime (6.7 MGy) reveal several detrimental processes, including volatilization, acidification, and oligomerization. The latter yields a polymer with m/z of 650 {+-} 300 whose radiolytic yield increases with dose (0.23 monomer units per 100 eV for 1-methyl-3-butylimidazolium trifluorosulfonate). Gradual generation of this polymer accounts for the steady increase in the viscosity of the ILs upon irradiation. Previous studies at lower dose have missed this species due to its wide mass distribution (stretching out to m/z 1600) and broad NMR lines, which make it harder to detect at lower concentrations. Among other observed changes is the formation of water immiscible fractions in hydrophilic ILs and water miscible fractions in hydrophobic ILs. The latter is due to anion fragmentation. The import of these observations for use of ILs as extraction solvents in nuclear cycle separations is discussed.

Shkrob, I. A.; Marin, T. W.; Chemerisov, S. D.; Hatcher, J.; Wishart, J. (Chemical Sciences and Engineering Division); (BNL)

2011-04-14T23:59:59.000Z

168

Cation sorption on the muscovite (001) surface in chloride solutions using high-resolution X-ray reflectivity  

E-Print Network [OSTI]

Cation sorption on the muscovite (001) surface in chloride solutions using high-resolution X of cation sorption at the (001) muscovite-water interface were investigated in 0.01 and 0.5 m KCl, Cs negative charge arising from structural heteroionic substitutions. This charge is balanced by the sorption

Jacobsen, Steven D.

169

Criteria for Generating Speci cation-based Tests A. Je erson O utt and Yiwei Xiong Shaoying Liu  

E-Print Network [OSTI]

- ria o er testers ways to decide what test inputs to use during testing, making it more likely presents a model for developing test in- puts from state-based speci cations, and formal crite- riaCriteria for Generating Speci cation-based Tests A. Je erson O utt and Yiwei Xiong Shaoying Liu

Offutt, Jeff

170

Evaluation of cation-exchanged zeolite adsorbents for post-combustion carbon dioxide capture  

E-Print Network [OSTI]

Evaluation of cation-exchanged zeolite adsorbents for post-combustion carbon dioxide capture Tae anthro- pogenic sources.1 Carbon capture and sequestration (CCS) has been proposed as a means of limiting evaluated for potential application in post-combustion CO2 capture using a new high-throughput gas

171

Non-Leaky Vesicle Fusion and Enhanced Cell Transfection Using a Cationic Facial Amphiphile  

E-Print Network [OSTI]

the interpreta- tion of results. In addition, there is the potential of discovering new types of fusion promotersNon-Leaky Vesicle Fusion and Enhanced Cell Transfection Using a Cationic Facial Amphiphile Yvonne R Dublin 2, Ireland ReceiVed December 23, 1999 Membrane fusion is an essential feature in many cellular

Smith, Bradley D.

172

Ionomer-Like Structures and ?-Cation Interactions in Argonne Premium Coals  

Science Journals Connector (OSTI)

Ionomer-Like Structures and ?-Cation Interactions in Argonne Premium Coals ... The increase in the amount of pyridine-soluble material obtained from Argonne Premium coals after acid treatment is examined. ... Accordingly, here we present results obtained from studies of the Argonne Premium coals before and after acid treatment. ...

Pakorn Opaprakasit; Alan W. Scaroni; Paul C. Painter

2002-02-28T23:59:59.000Z

173

Intermediate-range order and collective dynamics in an aqueous solution of trivalent cations  

Science Journals Connector (OSTI)

Molecular dynamics (MD) simulations of a concentrated aqueous solution of high-valence cations M3+ demonstrate the occurrence of intermediate-range order (IRO) by a pronounced prepeak at k?1.0Å?1 in the static structure factor. The IRO effect on the high-frequency collective dynamics of acoustic modes is investigated in a model system which mimics a 2.8M EuCl3 aqueous solution. A single branch in the dispersion relation of longitudinal acoustic (LA) modes in solution is obtained up to k?0.5Å?1, and then it splits into two branches for higher wave vectors. The low-frequency branch of LA modes in solution is not the well-known transverselike branch seen in MD simulation of pure water. It is assigned instead to a subsystem of M3+ cations plus water molecules belonging to the cations’ first hydration shell. The excitation energy of the low-frequency branch reaches a maximum in a k range half of the prepeak value, so that IRO plays the role of a pseudo–Brillouin zone for the cation subsystem. The high-frequency branch of the LA modes in solution follows the corresponding one in pure water, and in fact a subsystem of “bulk” water molecules is identified in solution showing high-frequency short-range structural relaxation similar to that of pure water.

Mauro C. C. Ribeiro

2006-01-10T23:59:59.000Z

174

Applying Practical Formal Methods to the Speci cation and Analysis of Security Properties  

E-Print Network [OSTI]

: chacs.nrl.navy.mil SCR Abstract. The SCR Software Cost Reduction toolset contains tools for specifying tabular notation for writing speci cations. Part of the SCR Software Cost Reduction requirements method system 7 , the shutdown system for the Darlington nuclear power plant 21 , and the ight program

175

Modelling and Veri cation of Automated Transit Systems, using Timed Automata, Invariants and  

E-Print Network [OSTI]

Modelling and Veri cation of Automated Transit Systems, using Timed Automata, Invariants in automated transit systems. The problems we consider are in- spired by design work in the Personal Rapid and Simulations Nancy Lynch ? Laboratory for Computer Science, Massachusetts Institute of Technology, Cambridge

Lynch, Nancy

176

UVA-visible photo-excitation of guanine radical cations produces sugar radicals in DNA and  

E-Print Network [OSTI]

UVA-visible photo-excitation of guanine radical cations produces sugar radicals in DNA and model, 2005; Revised and Accepted September 6, 2005 ABSTRACT This work presents evidence that photo- nucleosides and deoxyribonucleotides. In dsDNA at low temperatures, formation of C10 is observed from photo

Simons, Jack

177

CO adsorption-desorption properties of cation-exchanged NaX zeolite and supported ruthenium  

SciTech Connect (OSTI)

The binding states of carbon monoxide over cation-exchanged NaX zeolites and over corresponding Ru-containing samples have been investigated using thermal desorption spectroscopy. Exchange of sodium with cations such as Li{sup +}, Ca{sup 2+}, Mg{sup 2+}, and La{sup 3+} gave rise to additional CO adsorption states, a higher isosteric heat of CO adsorption, an increased density of acid sites, and an increased amount of adsorbed CO, depending on the nature and ionic radius of the charge-balancing cation. The charge-balancing cations at the zeolite surface (e.g., Ca{sub 2+}, La{sup 3+}) function as additional CO adsorption sites in conjunction with surface acid centers (e.g., the Al{sup 3+} center) and metal sites. In addition to surface sites, CO is also found to be held in structural cavities and macropores of the zeolite matrix. The programmed heating of both the metal-free and Ru-containing zeolites subsequent to room temperature CO adsorption gave desorption peaks due to release of CO at temperatures less than {approximately}500 K while the higher temperature peaks were constituted mainly of CO{sub 2}. Electron spectroscopy results have revealed that the exposure of these samples to CO and subsequent thermal treatment resulted in the formation of surface carbonaceous species. The nature of CO adsorption states giving rise to CO{sub 2} formation is discussed.

Gupta, N.M.; Kamble, V.S.; Rao, K.A.; Iyer, R.M. (Bhabha Atomic Research Centre, Bombay (India))

1989-12-01T23:59:59.000Z

178

The effect of paramagnetic manganese cations on 1 H MR spectroscopy of the brain  

E-Print Network [OSTI]

The effect of paramagnetic manganese cations on 1 H MR spectroscopy of the brain K. S. Madsen1 has investigated the effect of Mn on 1 H MR spectroscopy using an in vivo Mn-enhanced optic tract into a stereotactic device. Images and 1 H MR spectra were acquired using a Varian 4.7T animal scanner together

179

Methane-to-Methanol Conversion by Gas-Phase Transition Metal Oxide Cations: Experiment and Theory  

E-Print Network [OSTI]

Methane-to-Methanol Conversion by Gas-Phase Transition Metal Oxide Cations: Experiment and Theory Ricardo B. Metz Department of Chemistry, University of Massachusetts, Amherst, MA 01003 USA Abstract Gas such as methanol has attracted great experimental and theoretical interest due to its importance as an industrial

Metz, Ricardo B.

180

Correlation among electronegativity, cation polarizability, optical basicity and single bond strength of simple oxides  

SciTech Connect (OSTI)

A suitable relationship between free-cation polarizability and electronegativity of elements in different valence states and with the most common coordination numbers has been searched on the basis of the similarity in physical nature of both quantities. In general, the cation polarizability increases with decreasing element electronegativity. A systematic periodic change in the polarizability against the electronegativity has been observed in the isoelectronic series. It has been found that generally the optical basicity increases and the single bond strength of simple oxides decreases with decreasing the electronegativity. The observed trends have been discussed on the basis of electron donation ability of the oxide ions and type of chemical bonding in simple oxides. - Graphical abstract: This figure shows the single bond strength of simple oxides as a function of element electronegativity. A remarkable correlation exists between these independently obtained quantities. High values of electronegativity correspond to high values of single bond strength and vice versa. It is obvious that the observed trend in this figure is closely related to the type of chemical bonding in corresponding oxide. Highlights: Black-Right-Pointing-Pointer A suitable relationship between free-cation polarizability and electronegativity of elements was searched. Black-Right-Pointing-Pointer The cation polarizability increases with decreasing element electronegativity. Black-Right-Pointing-Pointer The single bond strength of simple oxides decreases with decreasing the electronegativity. Black-Right-Pointing-Pointer The observed trends were discussed on the basis of type of chemical bonding in simple oxides.

Dimitrov, Vesselin, E-mail: vesselin@uctm.edu [Department of Silicate Technology, University of Chemical Technology and Metallurgy, 8, Kl. Ohridski Blvd., Sofia 1756 (Bulgaria)] [Department of Silicate Technology, University of Chemical Technology and Metallurgy, 8, Kl. Ohridski Blvd., Sofia 1756 (Bulgaria); Komatsu, Takayuki, E-mail: komatsu@mst.nagaokaut.ac.jp [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)] [Department of Materials Science and Technology, Nagaoka University of Technology, 1603-1 Kamitomioka-cho, Nagaoka 940-2188 (Japan)

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Calcium and Strontium Hexaluminates: NMR Evidence that "Pentacoordinate" Cation Sites Are Four-Coordinated  

E-Print Network [OSTI]

LETTERS Calcium and Strontium Hexaluminates: NMR Evidence that "Pentacoordinate" Cation Sites, strontium hexaluminate (SrAl12O19, "SA6") and calcium hexaluminate (CaAl12O19, "CA6," synthetic hibonite, not dynamical, disorder among these sites. Introduction Calcium and strontium hexaluminates (CaAl12O19, "CA6

Puglisi, Joseph

182

High energy electron beam curing of epoxy resin systems incorporating cationic photoinitiators  

DOE Patents [OSTI]

A mixture of epoxy resins such as a semi-solid triglycidyl ether of tris (hydroxyphenyl) methane and a low viscosity bisphenol A glycidyl ether and a cationic photoinitiator such as a diaryliodonium salt is cured by irradiating with a dosage of electron beams from about 50 to about 150 kGy, forming a cross-linked epoxy resin polymer.

Janke, Christopher J. (Powell, TN); Lopata, Vincent J. (Manitoba, CA); Havens, Stephen J. (Knoxville, TN); Dorsey, George F. (Farragut, TN); Moulton, Richard J. (Lafayette, CA)

1999-01-01T23:59:59.000Z

183

The subsurface temperature assessment by means of an indirect electromagnetic geothermometer  

Science Journals Connector (OSTI)

...new challenges for geothermal energy, Volterra, Italy, Extended...New challenges for geothermal energy, Volterra, Italy, Extended...2001, Three-dimensional geothermic model of the Karskii shelf...exploitation of geothermal energy resources in South America...

Viacheslav Spichak; Olga Zakharova

184

New Improved Equations For Na-K, Na-Li And Sio2 Geothermometers...  

Open Energy Info (EERE)

errors (2-3%) than for the original equation (5-29%). Authors Surendra P. Verma and Edgar Santoyo Published Journal Journal of Volcanology and Geothermal Research, 1997 DOI Not...

185

Electrophoresis of DNA Adsorbed to a Cationic Supported David J. Olson, Joseph M. Johnson, Prateek D. Patel, Eric S. G. Shaqfeh,  

E-Print Network [OSTI]

Electrophoresis of DNA Adsorbed to a Cationic Supported Bilayer David J. Olson, Joseph M. Johnson of individual DNA molecules electrostatically adsorbed to a cationic supported lipid bilayer. Obstacles,22 in their recent work on DNA electrostatically adsorbed to a fluid cationic lipid bilayer, found that the chains

Shaqfeh, Eric

186

Semantics of Architectural Speci cations in CASL Lutz Schroder 1 , Till Mossakowski 1 , Andrzej Tarlecki 2;3 , Bartek Klin 4 , and  

E-Print Network [OSTI]

at various levels in an institution-independent fashion. Introduction A common feature of present-day algebraic speci#12;cation languages (see e.g. [Wir86,EM85,GHG + 93,CoFI96,SW99]) is the provision;cations at various levels. We use a simple subset of Casl architectural speci#12;cations, which

Schröder, Lutz

187

Communication: CO oxidation by silver and gold cluster cations: Identification of different active oxygen species  

SciTech Connect (OSTI)

The oxidation of carbon monoxide with nitrous oxide on mass-selected Au{sub 3}{sup +} and Ag{sub 3}{sup +} clusters has been investigated under multicollision conditions in an octopole ion trap experiment. The comparative study reveals that for both gold and silver cations carbon dioxide is formed on the clusters. However, whereas in the case of Au{sub 3}{sup +} the cluster itself acts as reactive species that facilitates the formation of CO{sub 2} from N{sub 2}O and CO, for silver the oxidized clusters Ag{sub 3}O{sub x}{sup +} (n= 1-3) are identified as active in the CO oxidation reaction. Thus, in the case of the silver cluster cations N{sub 2}O is dissociated and one oxygen atom is suggested to directly react with CO, whereas a second kind of oxygen strongly bound to silver is acting as a substrate for the reaction.

Popolan, Denisia M.; Bernhardt, Thorsten M. [Institute of Surface Chemistry and Catalysis, University of Ulm, Albert-Einstein-Allee 47, 89069 Ulm (Germany)

2011-03-07T23:59:59.000Z

188

Multicolor Photoinitiators for Radical and Cationic Polymerization: Monofunctional vs Polyfunctional Thiophene Derivatives  

Science Journals Connector (OSTI)

Their abilities to initiate, when combined with an iodonium salt (and optionally N-vinylcarbazole), a ring-opening cationic photopolymerization of epoxides and radical photopolymerization of acrylates under various different irradiation sources (i.e., very soft halogen lamp irradiation, laser diode at 405, 457, 473, 532, and 635 nm and blue LED bulb at 462 nm) have been investigated. ... They are also particularly efficient for the cationic and radical photopolymerization of an epoxide/acrylate blend in a one-step hybrid cure and lead to the formation of an interpenetrated polymer network IPN (30 s for getting tack-free coatings). ... The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping, and laser flash photolysis techniques. ...

Pu Xiao; Frédéric Dumur; Damien Thirion; Sébastien Fagour; Antoine Vacher; Xavier Sallenave; Fabrice Morlet-Savary; Bernadette Graff; Jean Pierre Fouassier; Didier Gigmes; Jacques Lalevée

2013-08-20T23:59:59.000Z

189

Oxygen isotope fractionation effects in soil water via interaction with cations (Mg, Ca, K, Na) adsorbed to phyllosilicate clay minerals  

E-Print Network [OSTI]

) adsorbed to phyllosilicate clay minerals Erik Oerter a, , Kari Finstad a , Justin Schaefer b , Gregory R approaches to the measurement of the d18 O value of soil water. The adsorbed cation isotope effect may bear

Goldsmith, Greg

190

An Ounce of Prevention is Worth a Pound of Cure Towards Physically-Correct Speci cations of  

E-Print Network [OSTI]

ed reliability and timeliness requirements { is a crucial, highly desirable property of responsive. Examplesinclude commandand con- trol systems, nuclear reactors, process-control plants, robotics, avionics, formalveri cation, fault-tolerance, safety analysis, programming languages, development tools, scheduling

191

Compound and Elemental Analysis At Akutan Fumaroles Area (Kolker, Et Al.,  

Open Energy Info (EERE)

Akutan Fumaroles Area (Kolker, Et Al., Akutan Fumaroles Area (Kolker, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Akutan Fumaroles Area (Kolker, Et Al., 2010) Exploration Activity Details Location Akutan Fumaroles Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness useful DOE-funding Unknown Notes The chemistry of the hot springs strongly suggests the existence of a neutral chloride reservoir with economically developable temperature. The fluid geothermometry tells a consistent story, with cation geothermometry detecting a >210degrees C reservoir temperature, probably near the fumarole, and silica geothermometry and presence of sinter suggesting that 160 to 180degrees C exists close to hot spring B.

192

Modeling the Interaction between Integrin-Binding Peptide (RGD) and Rutile Surface: The Effect of Cation Mediation on Asp Adsorption  

SciTech Connect (OSTI)

The binding of a negatively charged residue, aspartic acid (Asp) in tripeptide arginine-glycine-aspartic acid, onto a negatively charged hydroxylated rutile (110) surface in aqueous solution, containing divalent (Mg{sup 2+}, Ca{sup 2+}, or Sr{sup 2+}) or monovalent (Na{sup +}, K{sup +}, or Rb{sup +}) cations, was studied by molecular dynamics (MD) simulations. The results indicate that ionic radii and charges will significantly affect the hydration, adsorption geometry, and distance of cations from the rutile surface, thereby regulating the Asp/rutile binding mode. The adsorption strength of monovalent cations on the rutile surface in the order Na{sup +} > K{sup +} > Rb{sup +} shows a 'reverse' lyotropic trend, while the divalent cations on the same surface exhibit a 'regular' lyotropic behavior with decreasing crystallographic radii (the adsorption strength of divalent cations: Sr{sup 2+} > Ca{sup 2+} > Mg{sup 2+}). The Asp side chain in NaCl, KCl, and RbCl solutions remains stably H-bonded to the surface hydroxyls and the inner-sphere adsorbed compensating monovalent cations act as a bridge between the COO{sup -} group and the rutile, helping to 'trap' the negatively charged Asp side chain on the negatively charged surface. In contrast, the mediating divalent cations actively participate in linking the COO{sup -} group to the rutile surface; thus the Asp side chain can remain stably on the rutile (110) surface, even if it is not involved in any hydrogen bonds with the surface hydroxyls. Inner- and outer-sphere geometries are all possible mediation modes for divalent cations in bridging the peptide to the rutile surface.

Wu, Chunya [Harbin Institute of Technology; Skelton, Adam [Vanderbilt University; Chen, Mingjun [Harbin Institute of Technology; Vlcek, Lukas [ORNL; Cummings, Peter T [ORNL

2012-01-01T23:59:59.000Z

193

Layered inorganic/organic mercaptopropyl pendant chain hybrid for chelating heavy cations  

SciTech Connect (OSTI)

Graphical abstract: Crystalline lamellar silicate RUB-18 was immobilized with mercaptopropyl groups at the surface and then used as support for cadmium and lead removal from aqueous solutions. Highlights: Black-Right-Pointing-Pointer Synthetic methodology requires intercalation. Black-Right-Pointing-Pointer Organofunctionalized ilerite compound as sorbent. Black-Right-Pointing-Pointer Active mercaptopropyl groups remove cations. Black-Right-Pointing-Pointer High maximum sorption capacity for cadmium. -- Abstract: Heavy metal sorbents with uptake capacities for divalent cadmium and lead cation removal from aqueous solutions have been synthesized by grafting mercaptopropyltrimethoxysilane onto the surface of two different precursors obtained from lamellar ilerite, its acidic and the cetyltrimethylammonium exchanged forms. The organofunctionalization was carried out by two different procedures: reflux and solvent evaporation methodologies. Elemental analysis data based on carbon content gave 1.37 and 3.53 mmol of organic pendant groups per gram of hybrid by the reflux method, when starting from acidic ilerite and the surfactant form. X-ray diffraction corroborated the maintenance of the original crystallinity. Infrared spectroscopy and nuclear magnetic resonance for {sup 29}Si and {sup 13}C nuclei are in agreement with the success of the proposed method. The sulfur basic centers attached to the lamellar structure are used to coordinate both cations at the solid/liquid interface. The isotherms were obtained through the batchwise process and the experimental data were adjusted to the Freundlich model. The maximum sorption capacities of 5.55 and 5.12 mmol g{sup -1} for lead and 6.10 and 7.10 mmol g{sup -1} for cadmium were obtained for organofunctionalized ilerite and its surfactant form, synthesized by reflux methodology. This behavior suggested that these hybrids could be employed as promising sorbents with a polluted system.

Macedo, Thais R. [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)] [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil); Petrucelli, Giovanni C. [Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil)] [Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil); Pinto, Alane A. [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil) [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil); Institute of Chemistry, Federal University of Goias, Jatai, P.O. Box 03, 75805-190 Jatai, GO (Brazil); Airoldi, Claudio, E-mail: airoldi@iqm.unicamp.br [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)] [Institute of Chemistry, University of Campinas, UNICAMP, P.O. Box 6154, 13084-71 Campinas, SP (Brazil)

2011-12-15T23:59:59.000Z

194

Cation-Bonding and Protonation of the Fe[subscript 4]-Square Cluster  

SciTech Connect (OSTI)

The synthesis and characterization of discrete, molecular iron-oxo clusters is pursued in the interest of molecular magnets, bioinspired materials and models for the geochemical aqueous-mineral interface. Iron-oxo clusters are challenging to synthesize in water, due to the extremely acidic and reactive nature of dissolved iron species, and thus require chelating ligands to passivate and neutralize the cluster surface. The 2-hydroxy-1,3-N,N,N',N'-diamino-propanetetraacetic acid (HPDTA) ligand has been used to isolate several Al and Fe cluster geometries, including the square clusters Fe{sub 4}(HPDTA){sub 2} and Al{sub 4}(HPDTA){sub 2}. While prior reports on the Fe{sub 4}(HPDTA){sub 2} cluster have focused on the magnetic properties, no solution characterization has been carried out. Using electrospray ionization mass-spectrometry (ESI-MS) we show this anionic Fe{sub 4}(HPDTA){sub 2} cluster can be dissolved intact in water, and recrystallized with virtually any metal as a countercation. The bonding of the metal cation to the square face of the cluster trends with ionic radii of the cations, as shown by structural characterization of Fe{sub 4}(HPDTA){sub 2} with Li{sup +}, Na{sup +}, Cs{sup +}, Mg{sup 2+}, Ba{sup 2+}, La{sup 3+}, Eu{sup 3+}, and Zn{sup 2+}. This trend is similar to that observed for association of cations on metal oxide surfaces in the environment. Furthermore, protonation of the bridging oxo ligands of this series of Fe{sub 4}(HPDTA){sub 2} clusters is variable (0, 1, or 2 protons), and structures as a function of protonation is discussed. This paper, largely structural in nature, sets the foundation for future aqueous phase studies of iron-oxo molecular clusters as models for the oxide-water interface in the natural aqueous environment.

Hou, Yu; Rodriguez, Mark A.; Nyman, May (Sandia)

2012-04-30T23:59:59.000Z

195

Cation-substituted spinel oxide and oxyfluoride cathodes for lithium ion batteries  

DOE Patents [OSTI]

The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn.sub.2-y-zLi.sub.yM.sub.zO.sub.4 oxide with NH.sub.4HF.sub.2 at low temperatures of between about 300 and 700.degree. C. for 2 to 8 hours and a .eta. of more than 0 and less than about 0.50, mixed two-phase compositions consisting of a spinel cathode and a layered oxide cathode, and coupling them with unmodified or surface modified graphite anodes in lithium ion cells.

Manthiram, Arumugam; Choi, Wongchang

2014-05-13T23:59:59.000Z

196

Investigation of gamma induced degradation of Amberlite 200 cation resin by mass spectrometer and liquid chromatograph  

E-Print Network [OSTI]

, provisions were made for collecting samples of any gas produced. The irradiated resin was exposed to total 7 8 8 accumulations of 1. 0129X10 , 1. 0215XIO , and 5. 0168X10 Rads in three separate runs. It should be noted that the same amount of demineral.... (December 1977) Albert Antonio Freitag, B. S. , Texas A&M University Chairman of Advisory Committee: Dr. James 8. Smathers Amberlite 200 cation exchange resin was irradiated by gamma 7 8 radiation to doses of 10 to 5X10 Rads. Results of the analysis...

Freitag, Albert Antonio

1977-01-01T23:59:59.000Z

197

Retention of anhydrous ammonia as influenced by clay mineral types, cations, temperature and moisture  

E-Print Network [OSTI]

to various temperature levels . . . . . ~ 20 5a 6. 70 Ammoni. a retained sxuressed as psr cent of cation-exchange capacity for olays treated with anhydrous ammonia prior to heating to various temperature levels . ~. . . . . . ~ ~ . 21 Ammonia retained... encountered in the use of anhydrous ammoni. . . REVIEW OF LITER4TURE Some of the early work with anhydx ous ammonia was done by anderson, et al. (2), and Enderson and Eattson (3). St that t1ms anhydrous ammonia as sn inorganic source of nitrogen fertiliaer...

McBee, George G

1956-01-01T23:59:59.000Z

198

Transport of copper ammines through a cation-exchange membrane during electrodialysis  

SciTech Connect (OSTI)

Extraction of copper ammine complexes from waste waters in electroplating technology and in production of cuprammonium fibers is an important problem and electrodialysis with ion-exchange membranes is the most promising method of solving it. The authors aim was to study transport of copper(II) ammines through a commercial cation-exchange membrane of the MK-40 type. The electrodialyzer consisted of five Plexiglas compartments separated in alternating order by MK-40 cation-exchange and MA-40 anion-exchange membranes. The authors studied the dependence of the transport of copper(II) ammine complexes on the current density at copper concentration 0.025 M in the desalination compartment and 0.15 M ammonia concentration. The experiments lead to the conclusion that electrodialysis of copper(II) ammine complexes is possible only at current densities below the limiting values and that the transport is accompanied by decrease of the formation function of the complexes both in the membrane and in the solution of the concentrate receiving compartment.

Kireeva, L.D.; Shaposhnik, V.A.; Sorokina, V.I.

1987-09-10T23:59:59.000Z

199

Modeling cation diffusion in compacted water-saturatedNa-bentonite at low ionic strength  

SciTech Connect (OSTI)

Sodium bentonites are used as barrier materials for the isolation of landfills and are under consideration for a similar use in the subsurface storage of high-level radioactive waste. The performance of these barriers is determined in large part by molecular diffusion in the bentonite pore space. We tested two current models of cation diffusion in bentonite against experimental data on the relative apparent diffusion coefficients of two representative cations, sodium and strontium. On the 'macropore/nanopore' model, solute molecules are divided into two categories, with unequal pore-scale diffusion coefficients, based on location: in macropores or in interlayer nanopores. On the 'surface diffusion' model, solute molecules are divided into categories based on chemical speciation: dissolved or adsorbed. The macropore/nanopore model agrees with all experimental data at partial montmorillonite dry densities ranging from 0.2 (a dilute bentonite gel) to 1.7 kg dm{sup -3} (a highly compacted bentonite with most of its pore space located in interlayer nanopores), whereas the surface diffusion model fails at partial montmorillonite dry densities greater than about 1.2 kg dm{sup -3}.

Bourg, Ian C.; Sposito, Garrison; Bourg, Alain C.M.

2007-08-28T23:59:59.000Z

200

Diffusion of cations in chromia layers grown on iron-base alloys  

SciTech Connect (OSTI)

Diffusion of the cations Cr, Fe, Mn, and Ni in Cr{sub 2}O{sub 3} has been investigated at 1,173 K. The diffusion measurements were performed on chromia layers grown on the model alloys Fe-20Cr and Fe-20Cr-12Ni in order to consider effects of small amounts of dissolved alien cations in Cr{sub 2}O{sub 3}. The samples were diffusion annealed in H{sub 2}-H{sub 2}O at an oxygen partial pressure close to the Cr{sub 2}O{sub 3}/Cr equilibrium. For all tracers the lattice-diffusion coefficients are 3-5 orders of magnitude smaller than the grain-boundary diffusion coefficients. The lattice diffusivity of Mn is about two orders of magnitude greater than the other lattice-diffusion coefficients, especially in Cr{sub 2}O{sub 3} grown on Fe-20Cr-12Ni. The values of the diffusion coefficients for Cr, Fe, and Ni are in the same range. Diffusion of the tracers in Cr{sub 2}O{sub 3} grown on different alloys did not show significant differences with the exception of Mn.

Lobnig, R.E.; Hennesen, K.; Grabke, H.J. (Max-Planck Inst. fur Eisenforschung, Duesseldorf (West Germany)); Schmidt, H.P.

1992-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Panchromatic Photopolymerizable Cationic Films Using Indoline and Squaraine Dye Based Photoinitiating Systems  

Science Journals Connector (OSTI)

The development of novel dyes usable as photoinitiators (PIs) in photoinitiating systems (PISs) of polymerization working under soft visible light irradiations (e.g., household halogen lamps or fluorescent bulbs, household LEDs, sunlight, etc.) is an ongoing challenge attracting great attention in various fields ranging from radiation curing, imaging, and optic technologies to medicine, material science, or microelectronic areas. ... Interestingly, upon very soft LED bulb exposures (?10 mW cm–2), the D102/Iod/NVC combination exhibits good photoinitiating abilities for the cationic polymerization of EPOX under air (Figure 3(a) and Table S1 in the Supporting Information SI; blue LED, FC = 53%; green LED, FC = 51%; tack free coatings), whereas the SQ02/Iod photoinitiating system efficiently initiates the cationic polymerization of DVE-3 in laminate (Figure 3(b) and Table S1 in the Supporting Information; yellow LED, FC = 57%; red LED, FC = 87%; tack free coating). ... Fluorescence quenching rate const. of >60 typical electron donor-acceptor systems, such as fluorescing compds. of 3-pyrenecarboxylic acid (electron acceptor), and naphthalene (electron donor), and quenching compds. of tetracyanoethylene (electron acceptor), and N,N,N',N'-tetramethyl-p-phenylenediamine (electron donor), were measured in MeCN, and are correlated with the free enthalpy change, ?G23, involved in the actual electron transfer process 1F* ... Q ? F.-+. .... Q± (F* is an excited mol., and Q is a non-excited mol.) in the encounter complex, and varying between +5 and -60 kcal/mole. ...

Pu Xiao; Frédéric Dumur; Thanh Tuan Bui; Fabrice Goubard; Bernadette Graff; Fabrice Morlet-Savary; Jean Pierre Fouassier; Didier Gigmes; Jacques Lalevée

2013-07-29T23:59:59.000Z

202

Humic Acid Metal Cation Interaction Studied by Spectromicroscopy Techniques in Combination with Quantum Chemical Calculations  

SciTech Connect (OSTI)

Humic acids (HA) have a high binding capacity towards traces of toxic metal cations, thus affecting their transport in aquatic systems. Eu(III)-HA aggregates are studied by synchrotron-based scanning transmission X-ray microscopy (STXM) at the carbon K-edge and laser scanning luminescence microscopy (LSLM) at the {sup 5}D{sub 0} {yields} {sup 7}F{sub 1,2} fluorescence emission lines. Both methods provide the necessary spatial resolution in the sub-micrometre range to resolve characteristic aggregate morphologies: optically dense zones embedded in a matrix of less dense material in STXM images correspond to areas with increased Eu(III) luminescence yield in the LSLM micrographs. In the C 1s-NEXAFS of metal-loaded polyacrylic acid (PAA), used as a HA model compound, a distinct complexation effect is identified. This effect is similar to trends observed in the dense fraction of HA/metal cation aggregates. The strongest complexation effect is observed for the Zr(IV)-HA/PAA system. This effect is confirmed by quantum chemical calculations performed at the ab initio level for model complexes with different metal centres and complex geometries. Without the high spatial resolution of STXM and LSLM and without the combination of molecular modelling with experimental results, the different zones indicating a 'pseudo'-phase separation into strong complexing domains and weaker complexing domains of HA would never have been identified. This type of strategy can be used to study metal interaction with other organic material.

Plaschke, M.; Rothe, J; Armbruster, M; Denecke, M; Naber, A; Geckeis, H

2010-01-01T23:59:59.000Z

203

An infrared spectroscopy study of carbon monoxide adsorption on. alpha. -chromia surfaces: Probing oxidation states of coordinatively unsaturated surface cations  

SciTech Connect (OSTI)

CO adsorption on thermoevacuated, H{sub 2}-reduced and O{sub 2}-treated {alpha}-chromia surfaces was studied by IR spectroscopy in the temperature range 77-298 K. Coordinatively unsaturated (cus) Cr{sup 3+} cation sites, probably in 3-coordinate and to a much lesser extent 5-coordinate states, are the adsorption sites on H{sub 2}-reduced {alpha}-Cr{sub 2}O{sub 3}. The surface containing excess oxygen also exposes cus Cr{sup 4+} and Cr{sup 5+} sites. An empirical procedure is described which permits the determination of oxidation state and coordination number of the cus surface sites. This procedure is based on a correlation between C-O stretching frequency and electric field strength exerted by the cation. The latter is calculated from Pauling's strength of the electrostatic bond and effective ionic radii, both of which take the cation coordination into account.

Zaki, M.I.; Knoezinger, H. (Universitaet Muenchen (West Germany))

1989-10-01T23:59:59.000Z

204

Optical and electronic properties of mixed Ag-Au tetramer cations  

SciTech Connect (OSTI)

We present experimental and theoretical studies of the optical response of mixed Ag {sub n} Au {sub 4?n}{sup +} (n=1–3) clusters in the photon energy range ?? = 1.9–3.5 eV. Absorption spectra are recorded by a newly built longitudinal molecular beam depletion spectroscopy apparatus providing lower limits to absolute photodissociation cross sections. The experimental data are compared to optical response calculations in the framework of long-range corrected time-dependent density functional theory with initial cluster geometries obtained by the unbiased Birmingham Cluster Genetic Algorithm coupled with density functional theory. Experiments and excited state calculations shed light on the structural and electronic properties of the mixed Ag-Au tetramer cations.

Shayeghi, A., E-mail: shayeghi@cluster.pc.chemie.tu-darmstadt.de; Schäfer, R. [Eduard-Zintl-Institut, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt (Germany)] [Eduard-Zintl-Institut, Technische Universität Darmstadt, Alarich-Weiss-Straße 8, 64287 Darmstadt (Germany); Heard, C. J.; Johnston, R. L. [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)] [School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

2014-02-07T23:59:59.000Z

205

Self-Assembly of Hexanuclear Clusters of 4f and 5f Elements with Cation Specificity  

SciTech Connect (OSTI)

Six hexanuclear clusters of 4f and 5f elements were synthesized by room-temperature slow concentration experiments. Cerium(IV), thorium(IV), and plutonium(IV) each form two different hexanuclear clusters, among which the cerium and plutonium clusters are isotypic, whereas the thorium clusters show more diversity. The change in ionic radii of approximately 0.08 Å between these different metal ions tunes the cavity size so that NH{sub 4}{sup +} (1.48 Å) has the right dimensions to assemble the cerium and plutonium clusters, whereas Cs{sup +} (1.69 Å) is necessary to assemble the thorium clusters. If these cations are not used in the reactions, only amorphous material is obtained.

Diwu, J.; Good, Justin J.; DiStefano, Victoria H.; Albrecht-Schmitt, Thomas E.

2011-01-01T23:59:59.000Z

206

Intense pseudotransport of a cationic drug mediated by vacuolar ATPase: Procainamide-induced autophagic cell vacuolization  

SciTech Connect (OSTI)

Cationic drugs frequently exhibit large apparent volumes of distribution, consistent with various forms of cellular sequestration. The contributions of organelles and metabolic processes that may mimic drug transport were defined in human vascular smooth muscle cells. We hypothesized that procainamide-induced vacuolar cytopathology is driven by intense pseudotransport mediated by the vacuolar (V)-ATPase and pursued the characterization of vesicular trafficking alterations in this model. Large amounts of procainamide were taken up by intact cells (maximal in 2 h, reversible upon washout, apparent K{sub M} 4.69 mM; fluorometric determination of cell-associated drug). Procainamide uptake was extensively prevented or reversed by pharmacological inhibition of the V-ATPase with bafilomycin A1 or FR 167356, decreased at low extracellular pH and preceded vacuolar cell morphology. However, the uptake of procainamide was unaffected by mitochondrial poisons that reduced the uptake of rhodamine 6G. Large vacuoles induced by millimolar procainamide were labeled with the late endosome/lysosome markers Rab7 and CD63 and the autophagy effector LC3; their osmotic formation (but not procainamide uptake) was reduced by extracellular mannitol and parallel to LC3 II formation. Procainamide-induced vacuolization is associated with defective endocytosis of fluorophore-labeled bovine serum albumin, but not with induction of the unfolded protein response. The contents of a vacuole subset slowly ({>=} 24 h) become positive for Nile red staining (phospholipidosis-like response). V-ATPase-driven ion trapping is a form of intense cation pseudotransport that concerns the uncharged form of the drugs, and is associated with a vacuolar, autophagic and evolutive cytopathology and profound effects on vesicular trafficking.

Morissette, Guillaume [Centre de recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Quebec, Quebec QC, G1V 4G2 (Canada); Centre de recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Quebec, Quebec QC, G1V 4G2 (Canada); Lodge, Robert [Centre de recherche en Infectiologie, Centre Hospitalier Universitaire de Quebec, Quebec QC, G1V 4G2 (Canada); Marceau, Francois [Centre de recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Quebec, Quebec QC, G1V 4G2 (Canada); Centre de recherche en Rhumatologie et Immunologie, Centre Hospitalier Universitaire de Quebec, Quebec QC, G1V 4G2 (Canada)], E-mail: francois.marceau@crchul.ulaval.ca

2008-05-01T23:59:59.000Z

207

Influence of relaxation transitions on radiation-initiated cationic graft polymerization. [Gamma radiation  

SciTech Connect (OSTI)

Radiation grafting of vinyl n-butyl ether (VBE) to polyvinyl chloride (PVC) over a broad temperature range was investigated. The relaxation transitions in the PVC/VBE system were also determined. Grafting of vinyl alkyl ethers proceeds entirely by a cationic mechanism in a reaction medium that has been dried to a water concentration no greater than 0.1-1.0 ppm. In this connection, the diffusion properties of water in the temperature region were studied. Commercial films of unplasticized PVC (thickness 200 M); were subjected to swelling in two systems: in a 50% solution of VBE in benzene at 25/sup 0/C, and in the pure monomer at 40/sup 0/C. The reaction mixtures were first dried over metallic sodium in a deaerated atmosphere. The specimens were irradiated in a Co gamma-radiation unit to a dose of 10 kGy at a dose rate of 3 Gy/sec. The first reaction mixture was investigated over a range of temperatures from -60/sup 0/ to +70/sup 0/C, and the second from -15/sup 0/ to +50/sup 0/C. The degree of grafting was determined from the increase in weight of the original ungrafted film. The temperature was held to within +/-1/sup 0/C. The relaxation transitions in the swollen polymer systems were determined by two methods, thermostimulated current (TSC) and thermomechanics (TM). It was found that in the region of the glass transition of a swollen PVC-VBE system, radiation-initiated cationic graft polymerization proceeds at a maximal rate, and there are changes in state of the water molecules (the agents of breaking the ion reaction chain) and in their diffusion properties within the matrix.

Kudryavtsev, V.N.; Kabanov, V.Ya.; Chalykh, A.E.; Spitsyn, V.I.

1982-05-01T23:59:59.000Z

208

To appear in Proceedings, International Symposium on Requirements Engineering, York, England, March 26-27, 1995 1 Consistency Checking of SCR-Style Requirements Speci cations  

E-Print Network [OSTI]

26-27, 1995 1 Consistency Checking of SCR-Style Requirements Speci cations Constance Heitmeyer checking that mechanically checks requirements speci cations, expressed in the SCR tab- ular notation. As background, the SCR notation for specifying requirements is reviewed. A formal re- quirements model

209

JOURNAL DE PHYSIQUE Colloque C1, suppliment au no 4, Tome 38, Avril 1977, page C1-207 KINETICS OF THE CATION REDISTRIBUTION IN MAGNESIUM FERRITES  

E-Print Network [OSTI]

OF THE CATION REDISTRIBUTION IN MAGNESIUM FERRITES V. A. M. BRABERS and J. KLERK Department of Physics distribution des ions Mg2+et Fe3+sur les sites tetrakdriques et octakdriquesde ferrites de magnesium est Ctudi properties of ferrites. The cation distribution in magnesium ferrite has been studied by various authors

Boyer, Edmond

210

Nuclear spin relaxation of sodium cations in bacteriophage Pf1 solutions D. N. Sobieski, N. R. Krueger, S. Vyas,a  

E-Print Network [OSTI]

Nuclear spin relaxation of sodium cations in bacteriophage Pf1 solutions D. N. Sobieski, N. R The nuclear magnetic resonance NMR spectra for the I=3/2 23 Na cation dissolved into filamentous bacteriophage the 23 Na nuclear quadrupole moment and the electric field gradient produced by the negatively charged Pf

Augustine, Mathew P.

211

ReproducedfromJournalofEnvironmentalQuality.PublishedbyASA,CSSA,andSSSA.Allcopyrightsreserved. Cation Bonding: A New Perspective on the Sorption of Polycyclic  

E-Print Network [OSTI]

JournalofEnvironmentalQuality.PublishedbyASA,CSSA,andSSSA.Allcopyrightsreserved. Cation­ Bonding: A New Perspective on the Sorption of Polycyclic Aromatic Hydrocarbons to Mineral potential cation­ interactions between Potential mechanisms controlling NOC sorption to donors both spectroscopic and batch sorption methods. Quadrupolar split- primarily on batch sorption

Herbert, Bruce

212

Mechanism of Cation Exchange Process for Epitaxy of Superconducting HgBa2CaCu2O6 Films and Passive Microwave Devices  

E-Print Network [OSTI]

cations into, the lattice of epitaxial Tl2Ba2CaCu2O8 (Tl-2212) or TlBa2CaCu2O7 (Tl-1212) precursor films. Aiming at the remained issues in understanding the mechanism of the cation exchange (CE) process, this thesis work has studied the reversibility of CE...

Zhao, Hua

2007-12-17T23:59:59.000Z

213

Cationic triple-chain amphiphiles facilitate vesicle fusion compared to double-chain or single-chain analogues  

E-Print Network [OSTI]

-chain analogues. Two types of vesicle fusion experiments were conducted, mixing of oppositely charged vesicles-determining step for certain cell types is endosomal escape, which can occur either by a fusion or disruptionCationic triple-chain amphiphiles facilitate vesicle fusion compared to double-chain or single

Smith, Bradley D.

214

THE DETERMINATIVE ROLE OF THE EXCHANGE CATION AND LAYER-CHARGE DENSITY OF SMECTITE ON AFLATOXIN ADSORPTION  

Science Journals Connector (OSTI)

...dioxin, and atrazine reported in the literature. Yet, the types of the exchange cations...was supplied by Texas AgriLife Research Bioenergy Initiative Program, Texas Corn Producers...aflatoxin through the use of clay: A review. Food Additives Contaminants, Part...

Youjun Deng; Lian Liu; Ana Luisa Barrientos Velázquez; Joe B. Dixon

215

THE DETERMINATIVE ROLE OF THE EXCHANGE CATION AND LAYER-CHARGE DENSITY OF SMECTITE ON AFLATOXIN ADSORPTION  

Science Journals Connector (OSTI)

...more crowded exchange cation environment may have a better size-match...and atrazine reported in the literature. Yet, the types of the exchange...by Texas AgriLife Research Bioenergy Initiative Program, Texas...through the use of clay: A review. Food Additives Contaminants...

Youjun Deng; Lian Liu; Ana Luisa Barrientos Velázquez; Joe B. Dixon

216

Heating-Induced Micelle to Vesicle Transition in the Cationic-Anionic Surfactant Systems: Comprehensive Study and Understanding  

E-Print Network [OSTI]

Heating-Induced Micelle to Vesicle Transition in the Cationic-Anionic Surfactant Systems, 2004; In Final Form: January 6, 2005 Heating-induced micelle to vesicle transition (MVT), which has classes: Class A and B. Heating-induced MVT was observed in Class A at certain total surfactant

Huang, Jianbin

217

Modulation of a membrane lipid lamellar?nonlamellar phase transition by cationic lipids: A measure for transfection efficiency  

SciTech Connect (OSTI)

Synthetic cationic lipids can be used as DNA carriers and are regarded to be the most promising non-viral gene carriers. For this investigation, six novel phosphatidylcholine (PC) cationic derivatives with various hydrophobic moieties were synthesized and their transfection efficiencies for human umbilical artery endothelial cells (HUAEC) were determined. Three compounds with relatively short, myristoleoyl or myristelaidoyl 14:1 chains exhibited very high activity, exceeding by {approx}10 times that of the reference cationic derivative dioleoyl ethylPC (EDOPC). Noteworthy, cationic lipids with 14:1 hydrocarbon chains have not been tested as DNA carriers in transfection assays previously. The other three lipids, which contained oleoyl 18:1 and longer chains, exhibited moderate to weak transfection activity. Transfection efficiency was found to correlate strongly with the effect of the cationic lipids on the lamellar-to-inverted hexagonal, L{sub {alpha}} {yields} H{sub II}, phase conversion in dipalmitoleoyl phosphatidylethanolamine dispersions (DPoPE). X-ray diffraction on binary DPoPE/cationic lipid mixtures showed that the superior transfection agents eliminated the direct L{sub {alpha}} {yields} H{sub II} phase transition and promoted formation of an inverted cubic phase between the L{sub {alpha}} and H{sub II} phases. In contrast, moderate and weak transfection agents retained the direct L{sub {alpha}} {yields} H{sub II} transition but shifted to higher temperatures than that of pure DPoPE, and induced cubic phase formation at a later stage. On the basis of current models of lipid membrane fusion, promotion of a cubic phase by the high-efficiency agents may be considered as an indication that their high transfection activity results from enhanced lipoplex fusion with cellular membranes. The distinct, well-expressed correlation established between transfection efficiency of a cationic lipid and the way it modulates nonlamellar phase formation of a membrane lipid could be useful as a criterion to assess the quality of lipid carriers and for rational design of new and superior nucleotide delivery agents.

Tenchov, Boris G.; Wang, Li; Koynova, Rumiana; MacDonald, Robert C. (NWU)

2010-01-18T23:59:59.000Z

218

Supramolecular Structure of Pigment-Protein Complexes in Relation to the Chlorophyll a Fluorescence of Chloroplasts at 25° C or at -196° C: Cation Effect, pH Effect and Trypsinolysis  

Science Journals Connector (OSTI)

The oligomeric forms of the thylakoid pigment-protein complexes (LHCP1, LHCP2 and CPIa) are dissociated to their constituents in the presence of cations (Argyroudi-Akoyunoglou, 1980). Cations have been also found...

J. H. Argyroudi-Akoyunoglou; G. Akoyunoglou

1984-01-01T23:59:59.000Z

219

Deep Geothermal Reservoir Temperatures in the Eastern Snake River Plain, Idaho using Multicomponent Geothermometry  

SciTech Connect (OSTI)

The U.S. Geological survey has estimated that there are up to 4,900 MWe of undiscovered geothermal resources and 92,000 MWe of enhanced geothermal potential within the state of Idaho. Of particular interest are the resources of the Eastern Snake River Plain (ESRP) which was formed by volcanic activity associated with the relative movement of the Yellowstone Hot Spot across the state of Idaho. This region is characterized by a high geothermal gradient and thermal springs occurring along the margins of the ESRP. Masking much of the deep thermal potential of the ESRP is a regionally extensive and productive cold-water aquifer. We have undertaken a study to infer the temperature of the geothermal system hidden beneath the cold-water aquifer of the ESRP. Our approach is to estimate reservoir temperatures from measured water compositions using an inverse modeling technique (RTEst) that calculates the temperature at which multiple minerals are simultaneously at equilibrium while explicitly accounting for the possible loss of volatile constituents (e.g., CO2), boiling and/or water mixing. In the initial stages of this study, we apply the RTEst model to water compositions measured from a limited number of wells and thermal springs to estimate the regionally extensive geothermal system in the ESRP.

Ghanashyam Neupane; Earl D. Mattson; Travis L. McLing; Carl D. Palmer; Robert W. Smith; Thomas R. Wood

2014-02-01T23:59:59.000Z

220

Geothermometry At Neal Hot Springs Geothermal Area (U.S. Geothermal...  

Open Energy Info (EERE)

of 177 C. References U.S. Geothermal Inc. (2008) U.S. Geothermal Announces Successful Completion of First Well at Neal Hot Springs Additional References Retrieved from "http:...

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221

Atomistic Studies of Cation Transport in Tetragonal ZrO2 During Zirconium Corrosion  

SciTech Connect (OSTI)

Zirconium alloys are the major fuel cladding materials in current reactors. The water-side corrosion is one of the major degradation mechanisms of these alloys. During corrosion the transport of oxidizing species in zirconium dioxide (ZrO2) determines the corrosion kinetics. Previously it has been argued that the outward diffusion of cation ions is important for forming protective oxides. In this work, the migration of Zr defects in tetragonal ZrO2 is studied with temperature accelerated dynamics and molecular dynamics simulations. The results show that Zr interstitials have anisotropic diffusion and migrate preferentially along the [001] or c direction in tetragonal ZrO2. The compressive stresses can increase the Zr interstitial migration barrier significantly. The migration barriers of some defect clusters can be much lower than those of point defects. The migration of Zr interstitials at some special grain boundaries is much slower than in a bulk oxide. The implications of these atomistic simulation results in the Zr corrosion are discussed.

Xian-Ming Bai; Yongfeng Zhang; Michael R. Tonks

2013-10-01T23:59:59.000Z

222

Synthesis and chemistry of cationic d sup 0 metal alkyl complexes  

SciTech Connect (OSTI)

The objective of this project is to develop new types of electrophilic metal alkyl complexes for catalytic C-H activation and olefin polymerization chemistry, and associated fundamental mechanistic studies. We have focused our efforts on four classes of early metal alkyl complexes: (1) cationic group 4 Cp{sub 2}M(R){sup +} complexes (1) which are active species in Cp{sub 2}MX{sub 2}-based Ziegler-Natta olefin polymerization catalyst systems and which catalyze productive C-H activation reactions of heterocycles, (2) neutral (dicarbollide)(Cp*)M(R) complexes (2) which are structurally are electronically very similar to 1, (3) half-sandwich complexes CpM(R){sub 2}(L){sub n}{sup +} which are highly coordinatively and electronically unsaturated, and (4) new group 5 (dicarbollide)(Cp)MR{sub 2} and (dicarbollide){sub 2} MR complexes which are more unsaturated than group 5 Cp{sub 2}M systems due to incorporation of the dicarbollide ligand.

Jordan, R.F.

1991-01-01T23:59:59.000Z

223

A search for the sulphur hexafluoride cation with intense, few cycle laser pulses  

SciTech Connect (OSTI)

It is well established that upon ionization of sulphur hexafluoride, the SF{sub 6}{sup +} ion is never observed in mass spectra. Recent work with ultrashort intense laser pulses has offered indications that when strong optical field are used, the resulting “bond hardening” can induce changes in the potential energy surfaces of molecular cations such that molecular ions that are normally unstable may, indeed, become metastable enough to enable their detection by mass spectrometry. Do intense, ultrashort laser pulses permit formation of SF{sub 6}{sup +}? We have utilized intense pulses of 5 fs, 11 fs, and 22 fs to explore this possibility. Our results are negative: no evidence is discovered for SF{sub 6}{sup +}. However, multiply charged sulphur and fluorine ions from highly charged SF{sub 6}{sup q+} ions are observed that enable us to resolve the controversy regarding the kinetic energy release accompanying formation of F{sup +} fragment ions. Quantum chemical computations of field-distorted potential energy curves of SF{sub 6} and its molecular ion enable us to rationalize our non-observation of SF{sub 6}{sup +}. Our findings have implications for high harmonic generation from SF{sub 6} in the few-cycle regime.

Dota, Krithika; Mathur, Deepak, E-mail: atmol1@tifr.res.in [Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005 (India) [Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005 (India); Centre for Atomic and Molecular Physics, Manipal University, Manipal 576 104 (India); Dharmadhikari, Aditya K. [Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005 (India)] [Tata Institute of Fundamental Research, 1 Homi Bhabha Road, Mumbai 400 005 (India); Dharmadhikari, Jayashree A. [Centre for Atomic and Molecular Physics, Manipal University, Manipal 576 104 (India)] [Centre for Atomic and Molecular Physics, Manipal University, Manipal 576 104 (India); Patra, Kaustuv; Tiwari, Ashwani K. [Indian Institute of Science Education and Research - Kolkata, Mohanpur 741 252 (India)] [Indian Institute of Science Education and Research - Kolkata, Mohanpur 741 252 (India)

2013-11-21T23:59:59.000Z

224

Silica Polyamine Composites: New Supramolecular Materials for Cation and Anion Recovery and Remediation  

SciTech Connect (OSTI)

The surface coverage of amorphous silica gels used in the synthesis of silica polyamine composites has been investigated by 29Si NMR. By diluting the polyamine anchor silane, chloropropyl trichlorosilane, with methyl trichlorosilane it was found that surface coverage could be markedly improved for a range of amine polymers after grafting to the silica surface. The commensurate decrease in the number of anchor points and increase in the number of free amines results in an increase in metal capacity and/or an improvement in capture kinetics. Solid state CPMAS-13C NMR has been employed to investigate the structure and metal ion binding of a series of these composite materials. It is reported that the highly branched polymer, poly(ethyleneimine) (PEI) exhibits much broader 13C NMR resonances than the linear polymers poly(allylamine) (PAA) and poly(vinylamine) (PVA). These results are understood in terms of the low energy conformations calculated from molecular modeling studies. Three new applications of the technology are also presented: (1) separation of lanthanides as a group from ferric ion and all other divalent ions; (2) a multi step process for recovering and concentrating the valuable metals in acid mine drainage; (3) a process for removing low level arsenic and selenium in the presence of sulfate using immobilized cations on the composite materials.

Hughes, Mark; Miranda, Paul; Nielsen, Daniel J.; Rosenberg, Edward; Gobetto, Roberto; Viale, Alessandra; Burton, Sarah D.

2006-03-01T23:59:59.000Z

225

Continuous biodiesel production from acidic oil using a combination of cation- and anion-exchange resins  

Science Journals Connector (OSTI)

Abstract A continuous process was developed to produce biodiesel from acidic oil containing soybean oil and oleic acid, which combined esterification by cation-exchange resin NKC-9, online separation and transesterification by anion-exchange resin D261. The esterification was carried out with soybean oil/oleic acid weight ratio of 5/5, methanol to oleic acid weight ratio of 1.5/1, reaction temperature of 338 K and residence time of 126.6 min. After the reaction, the mixture was settled to online separate into two layers, and the methanol–water–oleic acid mixture at the top layer was reclaimed. The bottom layer, mainly containing soybean oil and methyl oleate, was transesterified under methanol/soybean oil weight ratio of 1/3 and n-hexane/soybean oil weight ratio of 1/2 at 323 K for the residence time of 112.0 min. The high conversions of oleic acid (above 98%) and soybean oil (92.3%) were achieved. The yield of biodiesel in this process reached up to 95.1%. The main parameters of the product met the Chinese Standard of biodiesel.

Benqiao He; Yixuan Shao; Yanbiao Ren; Jianxin Li; Yu Cheng

2015-01-01T23:59:59.000Z

226

Modelling Mixed Bed Ion Exchange Kinetics for Removal of Trace Levels of Divalent Cations in Ultrapure Water  

SciTech Connect (OSTI)

Ion exchanger resin fluid film mass transfer coefficients and the ionic diffusivities from which they are derived are often measured by use of ion exchange resin columns. Such tests, usually run dynamically using short resin beds, are often performed using relatively high (ppm) concentrations of ions to accurately measure output concentrations as a function of flow rate. The testing described herein was performed to determine fluid film ionic diffusivities for cationic concentrations typical of ultrapure water ({le}ppb levels) containing ppm levels of ammonia. Effective ionic diffusivities at these low ionic concentrations and high pHs were needed to complete a computer model (SIMIX) to be used in ion exchange simulations. SIMIX is a generalized multicomponent ion exchange model designed to simulate the removal of divalent cations from ultrapure water.

B. Widman

2003-01-01T23:59:59.000Z

227

Role of the Li+ node in the Li-BH4 substructure of double-cation tetrahydroborates  

Science Journals Connector (OSTI)

The phase diagram of combined alkaline light-metal and heavy-metal borohydrides is explored and revealed to be surprisingly rich. The Li cation is revealed to be a versatile node, allowing for three- and fourfold connectivity in the same structure. Topologies of the Li-BH4 substructure range from isolated chains to three-dimensional frameworks as a function of Li content.

Schouwink, P.

2014-10-01T23:59:59.000Z

228

G en eralisation de th eor emes inductifs pour la v eri cation d'architectures r eguli eres  

E-Print Network [OSTI]

G#19;en#19;eralisation de th#19;eor#18;emes inductifs pour la v#19;eri#12;cation d'architectures r, preuve qui n#19;e- cessite fr#19;equemment une phase de g#19;en#19;eralisation de th#19;eor#18;emes. Nous proposons une m#19;ethode de g#19;en#19;eralisation qui permet de produire le th#19;eor#18;eme g#19;en#19

Pierre, Laurence

229

Interaction of the cesium cation with calix[4]arene-bis(t-octylbenzo-18-crown-6): Extraction and DFT study  

Science Journals Connector (OSTI)

From extraction experiments and ?-activity measurements, the extraction constant corresponding to the equilibrium Cs+ (aq) + I? (aq) + 1 (org) ? 1?Cs+ (org) + I? (org) taking place in the two-phase water-phenyltrifluoromethyl sulfone (abbrev. FS 13) system (1 = calix[4]arene-bis(t-octylbenzo-18-crown-6); aq = aqueous phase, org = FS 13 phase) was evaluated as log Kex (1?Cs+, I?) = 2.1 ± 0.1. Further, the stability constant of the 1?Cs+ complex in FS 13 saturated with water was calculated for a temperature of 25 °C: log ?org (1?Cs+) = 9.9 ± 0.1. Finally, by using quantum mechanical DFT calculations, the most probable structure of the cationic complex species 1?Cs+ was derived. In the resulting 1?Cs+ complex, the “central” cation Cs+ is bound by eight bond interactions to six oxygen atoms of the respective 18-crown-6 moiety and to two carbons of the corresponding two benzene rings of the parent ligand 1 via cation–? interaction.

Emanuel Makrlík; Petr Toman; Petr Va?ura; Bruce A. Moyer

2013-01-01T23:59:59.000Z

230

Rovibronically selected and resolved two-color laser photoionization and photoelectron study of nickel carbide cation  

SciTech Connect (OSTI)

We have performed a two-color laser photoionization and photoelectron study of nickel carbide (NiC) and its cation (NiC{sup +}). By preparing NiC in a single rovibronic level of an intermediate vibronic state via visible laser excitation prior to ultraviolet laser photoionization, we have measured the photoionization efficiency spectrum of NiC near its ionization threshold, covering the formation of NiC{sup +}(X {sup 2}{Sigma}{sup +};v{sup +}=0-3). We have also obtained well-resolved rotational transitions for the v{sup +}=0 and 1 vibrational bands of the NiC{sup +}(X {sup 2}{Sigma}{sup +}) ground state. The assignment of rotational transitions observed between the neutral NiC intermediate state and the NiC{sup +} ion ground state has allowed the direct determination of a highly precise value for the ionization energy of NiC, IE(NiC)=67 525.1{+-}0.5 cm{sup -1} (8.372 05{+-}0.000 06 eV). This experiment also provides reliable values for the vibrational spacing [{Delta}G(1/2)=859.5{+-}0.5 cm{sup -1}], rotational constants (B{sub e}{sup +}=0.6395{+-}0.0018 cm{sup -1} and {alpha}{sub e}{sup +}=0.0097{+-}0.0009 cm{sup -1}), and equilibrium bond distance (r{sub e}{sup +}=1.628 A) for the NiC{sup +}(X {sup 2}{Sigma}{sup +}) ground state. The experimental results presented here are valuable for benchmarking the development of more reliable ab initio quantum computation procedures for energetic and spectroscopic calculations of transition metal-containing molecules.

Chang, Yih Chung [Department of Chemistry, University of California, Davis, Davis, California 95616 (United States); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 106, Taiwan (China); Shi Xiaoyu; Ng, C. Y. [Department of Chemistry, University of California, Davis, Davis, California 95616 (United States); Lau, Kai-Chung [Department of Biology and Chemistry, City University of Hong Kong, Kowloon (Hong Kong); Yin Qingzhu [Department of Geology, University of California, Davis, Davis, California 95616 (United States); Liou, H. T. [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 106, Taiwan (China)

2010-08-07T23:59:59.000Z

231

Zeolitized tuffs in pedotechniques to improve soil resilience against the impact of treatment by municipal sewage: balance of nutrient and noxious cations  

Science Journals Connector (OSTI)

...sample; (2) the natural cationic composition of these exchangers; (3) the concentration...depending on the variability of DSW composition, with peaks at the third, seventh...Gavalova Z. (2004) Agricultural and agrochemical uses of natural zeolite of the clinoptilolite...

G. F. Capra; A. Buondonno; E. Coppola; M. G. Duras; S. Vacca; C. Colella

232

Intramolecular cationic [5 + 2] cycloaddition reactions promoted by trimethylsilyl triflate in 3.0 M lithium perchlorate-ethyl acetate: Application to a formal total synthesis of (±)-isocomene  

Science Journals Connector (OSTI)

Trimethylsilyl triflate is an effective reagent in 3.0 M lithium perchlorate-ethyl acetate for promoting intramolecular cationic [5 + 2] cycloaddition reactions. A formal total synthesis of the angular triquinane isocomene (10) is detailed. Cationic [5 + 2] cycloaddition of quinone monoketal 40 gives rise to tricyclic diketone 35 which is subsequently converted into the known tricyclic ketone 33. Addition of methyl lithium followed by acid-catalyzed rearrangement employing the Pirrung protocol affords (±)-isocomene (10).

Paul A. Grieco; John K. Walker

1997-01-01T23:59:59.000Z

233

New iodocuprates(I) with N-heterocyclic molecules as the cations  

SciTech Connect (OSTI)

Under the hydrothermal conditions, the reactions between CuI, KI and bp/bpp (bp=4,4?-bipiperidine, bpp=1,3-bis(4-piperidyl)propane) in an acidic alcohol solution produced three new organically templated iodocuprates(I) as [H{sub 2}bp]{sub 2}[Cu{sub 2}I{sub 6}] 1, [tmbp][Cu{sub 2}I{sub 4}] 2 and [tmbpp] 2 [Cu{sub 4}I{sub 8}]·2H{sub 2}O 3 (tmbp{sup 2+}=N,N,N?,N?-tetramethyl-4,4?-bipiperidinium; tmbpp{sup 2+}=N,N,N?,N?-tetramethyl-1,3-bis(4-piperidyl)propane dication). X-ray analysis revealed that (i) tmbp{sup 2+} and tmbpp{sup 2+} in compounds 2 and 3 originated from the complete N-alklation of bp/bpp with CH{sub 3}OH; (ii) templated by H{sub 2}bp{sup 2+}, the inorganic anion [Cu{sub 2}I{sub 6}]{sup 2?} of 1 possesses a dinuclear structure, whereas templated by tmbp{sup 2+}, the inorganic anion [Cu{sub 2}I{sub 4}]{sup 2?} of 2 exhibits a one-dimensional (1D) chain structure; (iii) templated by tmbpp{sup 2+}, the inorganic anion [Cu{sub 4}I{sub 8}]{sup 4?} of 3 shows a cubane-like structure modified by four terminal I{sup ?} ions. The photoluminescence analysis indicates that compounds 1 and 2 emit blue light, while compound 3 emits green light. - Graphical abstract: By employing hydrothermal in situ N-alkylation of bp/bpp with CH{sub 3}OH, three new organically templated iodocuprates(I) were obtained. Display Omitted - Highlights: • Three new organically templated iodocuprates(I) were reported. • Cations tmbp{sup 2+} and tmbpp{sup 2+} originated from in situ alkylation of bp/bpp with CH{sub 3}OH. • H{sup +} and I{sup ?} play a key role in alkylation of bp/bpp with CH{sub 3}OH. • Photoluminescence emission for iodocuprates(I) is related to Cu···Cu interaction.

Zhao, Jin-Jing [College of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin 130023 (China); Zhang, Xiao [State Key Lab of Urban Water Resource and Environment (SKLUWRE) and Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin, Heilongjiang 150080 (China); Wang, Yan-Ning; Jia, Hong-Li [College of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin 130023 (China); Yu, Jie-Hui, E-mail: jhyu@jlu.edu.cn [College of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin 130023 (China); Xu, Ji-Qing, E-mail: xjq@mail.jlu.edu.cn [College of Chemistry and State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun, Jilin 130023 (China)

2013-11-15T23:59:59.000Z

234

Synthesis, structural characterization and ferrimagnetic property of MnPS{sub 3} intercalated with nickel(II) cyclopolyamine complex cations  

SciTech Connect (OSTI)

Two new intercalation compounds were prepared by the reactions of Ni(II) cyclopolyamine complex cations with a preintercalate Mn{sub 1-x}PS{sub 3}K{sub 2x}(H{sub 2}O){sub y}, respectively, through 'ion exchange' process. Their structures were characterized by elemental analysis, X-ray powder diffraction and infrared spectroscopy. The lattice spacing increased 0.567 and 1.093nm with respect to the pristine MnPS{sub 3}. Ferrimagnetism of the intercalates was confirmed by SQUID experiment with T{sub c} at 40 and 33K, respectively.

Yang Kai [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China); Su Xu [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China); Zhang Xuan [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China); Chen Xingguo [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China); Fu Enqin [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China)]. E-mail: fueq@chem.whu.edu.cn; Qin Jingui [Department of Chemistry, Wuhan University, Luojia Hill, Wuhan City, Hubei Province 430072 (China); Inokuchi, Makoto [Faculty of Science and Engineering, Department of Materials Science and Environmental Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigaku-dori, Onoda, Yamaguchi 756-0884 (Japan)]. E-mail: inokuchi@ed.yama.tus.ac.jp; Kinoshita, Minoru [Faculty of Science and Engineering, Department of Materials Science and Environmental Engineering, Tokyo University of Science, Yamaguchi 1-1-1 Daigaku-dori, Onoda, Yamaguchi 756-0884 (Japan)

2004-11-01T23:59:59.000Z

235

Gram-scale separation of curium from americium using alpha-hydroxyisobutyric acid in high-pressure cation columns  

SciTech Connect (OSTI)

Quantities of heavy element (americium and curium) up to 2.3 g have been successfully separated by chromatographic elution from cation resin using alpha-hydroxyisobutyrate in equipment originally designed for decigram-scale separations of /sup 252/Cf and heavier elements. The high-pressure ion exchange process was reliable and relatively easy to operate. Overall curium recoveries of 80 to 90% were readily achieved with decontamination from americium by factors of 400 to 500. The product and waste streams are both in forms readily coupled to further processing steps.

Bigelow, J.E.; Benker, D.E.; Chattin, F.R.; King, L.J.; Knauer, J.B.; Ross, R.G.; Stacy, R.G.; Wiggins, J.T.

1984-01-01T23:59:59.000Z

236

18F-Labeled Magnetic-Upconversion Nanophosphors via Rare-Earth Cation-Assisted Ligand Assembly  

Science Journals Connector (OSTI)

18F-Labeled Magnetic-Upconversion Nanophosphors via Rare-Earth Cation-Assisted Ligand Assembly ... The inset of Figure S7 shows the bright-field photo of AA-Gd-UCNPs dispersed in PBS for 0 and 48 h. ... To determine whether UCNPs coated with folic acid and aminocaproic acid (FA-AA-Gd-UCNPs, FA:AA = 1:9) could be used for cellular targeted imaging, we performed in vitro cellular studies using FR-positive [FR(+)] KB cell lines and FR-negative [FR(?)] MCF-7 cell lines. ...

Qian Liu; Yun Sun; Chenguang Li; Jing Zhou; Chunyan Li; Tianshe Yang; Xianzhong Zhang; Tao Yi; Dongmei Wu; Fuyou Li

2011-03-08T23:59:59.000Z

237

Influence of Heteroanion and Ammonium Cation Size on the Composition and Gas-Phase Fragmentation of Polyoxovanadates  

SciTech Connect (OSTI)

This paper describes the results of a systematic experimental investigation of the influence of different size cationic ammonium ligands and heteroanions on the composition, ionic charge state and gas-phase fragmentation pathways of anionic polyoxovanadates synthesized in solution. Four separate solutions of olyoxometalates (POMs) were prepared using all possible combinations of the tetraethylammonium [(C2H5)4N+] ligand, chloride (Cl-) heteroanion, tetrabutylammonium [(C4H9)4N+] ligand and acetate (CH3CO2-) heteroanion. Employing electrospray ionization combined with high-resolution mass spectrometry (ESI-MS) we demonstrate that POM solutions synthesized using the small [(C2H5)4N+] ligand and Cl-heteroanion are composed predominately of large doubly and triply charged chlorine containing clusters with a size distribution centered at fourteen vanadium atoms. POM solutions prepared using the Cl- anion and [(C4H9)4N+] ligand are shown to contain slightly larger clusters with fifteen and sixteen vanadium atoms, thereby indicating that the size of the cationic ammonium ligand exerts only a weak influence on the polymerization of polyoxovanadates. POM solutions prepared using (C2H5)4NCl and (C4H9)4NCl also produced peaks consistent with the attachment of one and two ammonium cations to the larger clusters. Solutions prepared using the large CH3CO2 - heteroanion, in contrast, are demonstrated to contain much smaller singly and doubly *Manuscript Click here to view linked References 2 charged clusters with a size distribution centered at six vanadium atoms. In addition, while incorporation of one and two ammonium ligands into the smaller clusters was observed, no POMs containing the CH3CO2 - heteroanion were identified. The gas-phase fragmentation pathways of representative POMs containing one and two ammonium ligands were examined using collision induced dissociation (CID) and mass spectrometry. Similar primary fragmentation pathways involving partial loss of a ligand -[(CxHy)3N+ x = 2,4; y = 5,9] were observed for clusters containing both one and two ligands largely independent of the size, composition and charge state of the precursor ion. The [(C4H9)4N+] ligand was found to exhibit stronger interactions with the core of the POMs resulting in higher abundances of fragment ions containing (C4H9) units compared to (C2H5) units from [(C2H5)4N+]. These results provide fundamental insight into the interactions between anionic metal oxide clusters, heteroanions and cationic ammonium ligands that are responsible for the size and composition controlled synthesis of POMs in solution.

Johnson, Grant E.; Al Hasan, Naila M.; Laskin, Julia

2013-11-15T23:59:59.000Z

238

Self-Assembly of Nanostructured, Complex, Multi-cation Films via Spontaneous Phase Separation and Strain-driven Ordering  

SciTech Connect (OSTI)

Spontaneous self-assembly of a multi-cation nanophase in another multi-cation matrix phase is a promising bottom-up approach to fabricate novel, nanocomposite structures for a range of applications. In an effort to understand the mechanisms for such self-assembly, we report on complimentary experimental and theoretical studies to first understand and then control or guide the self-assembly of insulating BaZrO3 (BZO) nanodots within REBa2Cu3O7- (RE=rare earth elements including Y, REBCO) superconducting films. It was determined that the strain field developed around BZO nanodots embedded in REBCO matrix is a key driving force dictating the self-assembly of BZO nanodots along REBCO c-axis. The size selection and spatial ordering of BZO self-assembly were simulated using thermodynamic and kinetic models. The BZO self-assembly was controllable by tuning the interphase strain field. REBCO superconducting films with BZO defects arrays self-assembled to align in both vertical (REBCO c-axis) and horizontal (REBCO ab-planes) directions, resulted in the maximized pinning and Jc performance for all field angles with smaller angular Jc anisotropy. The work has broad implications for fabrication of controlled self-assembled nanostructures for a range of applications via strain-tuning.

Goyal, Amit [ORNL; Wee, Sung Hun [ORNL; Stocks, George Malcolm [ORNL; Zuev, Yuri L [ORNL; More, Karren Leslie [ORNL; Meng, Jianyong [ORNL; Zhong, Jianxin [ORNL

2013-01-01T23:59:59.000Z

239

On the possibility for Rb- and Eu-cation ordering in type-I clathrates: synthesis and homogeneity range of the novel compounds Rb8-xEux(In,Ge)46 (0.6 x 1.8)  

Science Journals Connector (OSTI)

Clathrates with the type-I structure are reported in the quaternary Rb-Eu-In-Ge system. Possible cation ordering is suggested.

Sch?fer, M.C.

2013-11-13T23:59:59.000Z

240

Cationic surfactant-enhanced sorption and nonionic surfactant-enhanced solubilization of hydrophobic organic contaminants in groundwater. Final report, October 1993--April 1997  

SciTech Connect (OSTI)

This study was conducted to assess the feasibility of using surfactants to immobilize and recover contaminants from groundwater. Before such a remediation method can be employed in the field, a understanding of the complex transport, partitioning behavior, and interactions of the surfactants and in a dynamic groundwater system is required. Batch, column and box aquifer model experiments conducted to investigate the proposed remediation strategy. Also, numerical modeling tools were developed to predict the coupled cationic/nonionic/HOC transport behavior within a dynamic groundwater. Experimental results show that it is feasible to create a stationary cationic surfactant-enhanced in situ within an aquifer. The main criteria for sorbent zone development are a relatively high exchange capacity, a low carbon content, and a relatively homogeneous and permeable aquifer. Numerical simulation results indicate that mass-transfer limiting desorption of the cationic surfactant will likely occur within an enhanced sorbent zone.

Hayworth, J.S.; Burris, D.R.

1997-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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241

UV-vis spectra of singlet state cationic polycyclic aromatic hydrocarbons: Time-dependent density functional theory study  

SciTech Connect (OSTI)

A theoretical study of singlet state cations of polycyclic aromatic hydrocarbons is performed. Appropriate symmetry suitable for further calculations is chosen for each of the systems studied. The excitation states of such species are obtained by the time dependent density functional theory (TD-DFT) method. The computations are performed using both Pople and electronic response properties basis sets. The results obtained with the use of different basis sets are compared. The electronic transitions are described and the relationships for the lowest-lying transitions states of different species are found. The properties of in-plane and out-of-plane transitions are also delineated. The TD-DFT results are compared with the experimental data available.

Dominikowska, Justyna, E-mail: justyna@uni.lodz.pl; Domagala, Malgorzata; Palusiak, Marcin [Department of Theoretical and Structural Chemistry, University of ?ód?, Pomorska 163/165, 90-236 ?ód? (Poland)] [Department of Theoretical and Structural Chemistry, University of ?ód?, Pomorska 163/165, 90-236 ?ód? (Poland)

2014-01-28T23:59:59.000Z

242

Recreation of Brønsted acid sites in phosphorus-modified HZSM-5(Ga) by modification with various metal cations  

Science Journals Connector (OSTI)

Abstract To investigate the recreation of Brønsted acid sites in phosphorus-modified HZSM-5(Ga) zeolites by modification with various metal cations, we prepared several HZSM-5(Ga) zeolites co-modified with Mg, Ca, La or Zr and P (M/P/HZSM-5(Ga)). From FT-IR, 31P MAS NMR, and NH3-TPD measurements, it was found that the introduced metal cations (M) of Mg, Ca, La, and Zr react with the pre-introduced phosphorus to generate phosphorus species such as Mx(PO4)y, resulting in the recreation of some native Brønsted acid sites (Si(OH)Ga). The degree of recreation of the Brønsted acid sites was strongly dependent on the M/Ga ratio and doped metal valence. Modification with La and Zr that have higher valences more effectively recreated the Brønsted acid sites compared to Mg and Ca, which have di-valence. The conversion of ethanol to propylene was carried out over the M/P/HZSM-5(Ga). The propylene yield increased with increasing M/Ga ratio and reached maximum values of ca. 26 C-% for Zr/P/HZSM-5(Ga) with a Zr/Ga ratio of 0.25 and ca. 29 C-% for La/P/HZSM-5(Ga) with a La/Ga ratio of 0.4. The propylene yield hardly changed for the co-modified HZSM-5(Ga) zeolites during the 24 h of reaction time, indicating the suppression of both carbonaceous deposition and the release of gallium from the zeolite framework.

Nao Tsunoji; Takushi Sonoda; Yoshiyasu Furumoto; Masahiro Sadakane; Tsuneji Sano

2014-01-01T23:59:59.000Z

243

A bifunctional adsorbent with high surface area and cation exchange property for synergistic removal of tetracycline and Cu2+  

Science Journals Connector (OSTI)

Abstract A novel bifunctional adsorbent with high surface area and cation exchange character (HAR-2) was prepared via copolymerization and hydrolysis reactions for the coremoval of tetracycline and Cu2+. HAR-2 possessed large specific surface area of 394 m2/g and high weak cation exchange capacity of 1.06 meq/g. The adsorption kinetics of TC or Cu2+ fitted both pseudo-first-order and pseudo-second order equations in single-substrate solution, whereas the adsorption kinetics were better described by pseudo-second order model in binary solutions. The adsorption of TC was an exothermic process, while the Cu2+ adsorption process was endothermic. The adsorption isotherms of TC and Cu2+ fitted the Langmuir model, suggesting a monolayer adsorption process. The adsorbed amount of TC was pronouncedly enhanced in the presence of Cu2+ due to the formation of tertiary surface complex HAR–Cu2+–TC. Likewise, the adsorption of Cu2+ was significantly improved by forming HAR–TC–Cu2+ complex in the presence of TC. The uptake of Cu2+ increased as pH increased, while the adsorbed amount of TC increased as pH rose from 2 to 3 but decreased when pH was further elevated from 3 to 6. The presence of NaCl exerted no significant influence on the adsorption of TC and negatively affected the adsorption of Cu2+. HAR-2 exhibited high stability over 5 repeated uses, only losing 6.3% and 18.4% of the initial adsorption capacity for TC and Cu2+, respectively.

Yan Ma; Qing Zhou; Sicong Zhou; Wei Wang; Jing Jin; Jiawen Xie; Aimin Li; Chendong Shuang

2014-01-01T23:59:59.000Z

244

Mechanistic Examination of C?–C? Bond Cleavages of Tryptophan Residues during Dissociations of Molecular Peptide Radical Cations  

SciTech Connect (OSTI)

In this study, we used collision-induced dissociation (CID) to examine the gas-phase fragmentations of [GnW]•+ (n = 2-4) and [GXW]•+ (X = C, S, L, F, Y, Q) species. The C?–C? bond cleavage of a C-terminal decarboxylated tryptophan residue ([M - CO2]•+) can generate [M - CO2 - 116]+, [M - CO2 - 117]•+, and [1H-indole]•+ (m/z 117) species as possible product ions. Competition between the formation of [M - CO2 - 116]+ and [1H-indole]•+ systems implies the existence of a proton-bound dimer formed between the indole ring and peptide backbone. Formation of such a proton-bound dimer is facile via a protonation of the tryptophan ?-carbon atom as suggested by density functional theory (DFT) calculations. DFT calculations also suggested the initially formed ion 2--the decarboxylated species that is active against C?–C? bond cleavage -can efficiently isomerize to form a more-stable -radical isomer (ion 9) as supported by Rice-Ramsperger-Kassel-Marcus (RRKM) modeling. The C?–C? bond cleavage of a tryptophan residue also can occur directly from peptide radical cations containing a basic residue. CID of [WGnR]•+ (n = 1-3) radical cations consistently resulted in predominant formation of [M-116]+ product ions. It appears that the basic arginine residue tightly sequesters the proton and allows the charge-remote C?–C? bond cleavage to prevail over the charge-directed one. DFT calculations predicted the barrier for the former is 6.2 kcal mol -1 lower than that of the latter. Furthermore, the pathway involving a salt-bridge intermediate also was accessible during such a bond cleavage event.

Song, Tao; Ma, Ching-Yung; Chu, Ivan K.; Siu, Chi-Kit; Laskin, Julia

2013-02-14T23:59:59.000Z

245

Proc. of: 6th IEEE Intern. Symp. on High Assurance Systems Engineering (HASE), 22-24 October 2001, Boca Raton, Florida, USA Integrating Automatic Veri cation of Safety Requirements  

E-Print Network [OSTI]

) that ensures the safe operation of the devices in a Railway Station. Of course a RIS is a Safety Critical in a given indus- try RIS design ow. The main obstructions to be overcome in our work are: selecting;cation in the preex- istent design ow nor retraining of personnel. We run veri#12;cation experiments

Tronci, Enrico

246

KINETICS AND MECHANISMS OF METAL CATION SORPTION AT THE MINERAL/WATER INTERFACE. 058. D. L. Sparks, A. M. Scheidegger, D. G. Strawn, and K. G. Scheckel, Plant and  

E-Print Network [OSTI]

KINETICS AND MECHANISMS OF METAL CATION SORPTION AT THE MINERAL/WATER INTERFACE. 058. D. L. Sparks of Delaware, Newark, DE 19717-1303. Metal cation sorption/release on natural materials is often biphasic for days and months. The mechanism for the slow reaction has been ascribed to diffusion phenomena, sorption

Sparks, Donald L.

247

Water Structure at the Air-Aqueous Interface of Divalent Cation and Nitrate Solutions Man Xu, Rick Spinney, and Heather C. Allen*  

E-Print Network [OSTI]

Water Structure at the Air-Aqueous Interface of Divalent Cation and Nitrate Solutions Man Xu, Rick, Columbus, Ohio 43210 ReceiVed: July 24, 2008; ReVised Manuscript ReceiVed: December 4, 2008 The water surface structure of aqueous magnesium, calcium, and strontium nitrate solutions with six to seven water

248

Influence of Cationic Precursors on CdS Quantum-Dot-Sensitized Solar Cell Prepared by Successive Ionic Layer Adsorption and  

E-Print Network [OSTI]

solar cells has grown significantly, and the technology has been considered as one of the most costInfluence of Cationic Precursors on CdS Quantum-Dot-Sensitized Solar Cell Prepared by Successive (QDs) onto porous oxide films for quantum-dot-sensitized solar cell (QDSC) applications. In this work

Cao, Guozhong

249

Temperature and magnetic field dependent optical spectral weight in the cation-deficient colossal-magnetoresistance material La0.936Mn0.982O3  

E-Print Network [OSTI]

with the general arguments, a broad peak has been observed in 1 various Mn-based CMR materials by several groupsTemperature and magnetic field dependent optical spectral weight in the cation-deficient colossal on single-crystal samples as a function of temperature and at zero and 0.5 T magnetic fields

Homes, Christopher C.

250

Coverage Dependent Charge Reduction of Cationic Gold Clusters on Surfaces Prepared Using Soft Landing of Mass-selected Ions  

SciTech Connect (OSTI)

The ionic charge state of monodisperse cationic gold clusters on surfaces may be controlled by selecting the coverage of mass-selected ions soft landed onto a substrate. Polydisperse diphosphine-capped gold clusters were synthesized in solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine in the presence of 1,3-bis(diphenylphosphino)propane. The polydisperse gold clusters were introduced into the gas phase by electrospray ionization and mass selection was employed to select a multiply charged cationic cluster species (Au11L53+, m/z = 1409, L = 1,3-bis(diphenylphosphino)propane) which was delivered to the surfaces of four different self-assembled monolayers on gold (SAMs) at coverages of 1011 and 1012 clusters/mm2. Employing the spatial profiling capabilities of in-situ time-of-flight secondary ion mass spectrometry (TOF-SIMS) it is shown that, in addition to the chemical functionality of the monolayer (as demonstrated previously: ACS Nano, 2012, 6, 573) the coverage of cationic gold clusters on the surface may be used to control the distribution of ionic charge states of the soft-landed multiply charged clusters. In the case of a 1H,1H,2H,2H-perfluorodecanethiol SAM (FSAM) almost complete retention of charge by the deposited Au11L53+ clusters was observed at a lower coverage of 1011 clusters/mm2. In contrast, at a higher coverage of 1012 clusters/mm2, pronounced reduction of charge to Au11L52+ and Au11L5+ was observed on the FSAM. When soft landed onto 16- and 11-mercaptohexadecanoic acid surfaces on gold (16,11-COOH-SAMs), the mass-selected Au11L53+ clusters exhibited partial reduction of charge to Au11L52+ at lower coverage and additional reduction of charge to both Au11L52+ and Au11L5+ at higher coverage. The reduction of charge was found to be more pronounced on the surface of the shorter (thinner) C11 than the longer (thicker) C16-COOH-SAM. On the surface of the 1-dodecanethiol (HSAM) monolayer, the most abundant charge state was found to be Au11L52+ at lower coverage and Au11L5+ at higher coverage, respectively. A coverage-dependent electron tunneling mechanism is proposed to account for the observed reduction of charge of mass-selected multiply charged gold clusters soft landed on SAMs. The results demonstrate that one of the critical parameters that influence the chemical and physical properties of supported metal clusters, ionic charge state, may be controlled by selecting the coverage of charged species soft landed onto surfaces.

Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

2012-11-29T23:59:59.000Z

251

Cationic Lipid-Nucleic Acid Complexes for Gene Delivery And Silencing: Pathways And Mechanisms for Plasmid Dna And Sirna  

SciTech Connect (OSTI)

Motivated by the promises of gene therapy, there is great interest in developing non-viral lipid-based vectors for therapeutic applications due to their low immunogenicity, low toxicity, ease of production, and the potential of transferring large pieces of DNA into cells. In fact, cationic liposome (CL) based vectors are among the prevalent synthetic carriers of nucleic acids (NAs) currently used in gene therapy clinical trials worldwide. These vectors are studied both for gene delivery with CL-DNA complexes and gene silencing with CL-siRNA (short interfering RNA) complexes. However, their transfection efficiencies and silencing efficiencies remain low compared to those of engineered viral vectors. This reflects the currently poor understanding of transfection-related mechanisms at the molecular and self-assembled levels, including a lack of knowledge about interactions between membranes and double stranded NAs and between CL-NA complexes and cellular components. In this review we describe our recent efforts to improve the mechanistic understanding of transfection by CL-NA complexes, which will help to design optimal lipid-based carriers of DNA and siRNA for therapeutic gene delivery and gene silencing.

Ewert, K.K.; Zidovska, A.; Ahmad, A.; Bouxsein, N.F.; Evans, H.M.; McAllister, C.S.; Samuel, C.E.; Safinya, C.R.; /SLAC

2012-07-17T23:59:59.000Z

252

Synthesis and chemistry of cationic d{sup 0} metal alkyl complexes. Progress report, July 1988--May 1991  

SciTech Connect (OSTI)

The objective of this project is to develop new types of electrophilic metal alkyl complexes for catalytic C-H activation and olefin polymerization chemistry, and associated fundamental mechanistic studies. We have focused our efforts on four classes of early metal alkyl complexes: (1) cationic group 4 Cp{sub 2}M(R){sup +} complexes (1) which are active species in Cp{sub 2}MX{sub 2}-based Ziegler-Natta olefin polymerization catalyst systems and which catalyze productive C-H activation reactions of heterocycles, (2) neutral (dicarbollide)(Cp*)M(R) complexes (2) which are structurally are electronically very similar to 1, (3) half-sandwich complexes CpM(R){sub 2}(L){sub n}{sup +} which are highly coordinatively and electronically unsaturated, and (4) new group 5 (dicarbollide)(Cp)MR{sub 2} and (dicarbollide){sub 2} MR complexes which are more unsaturated than group 5 Cp{sub 2}M systems due to incorporation of the dicarbollide ligand.

Jordan, R.F.

1991-12-31T23:59:59.000Z

253

Location and valence state of strontium cations on the framework of a carbon dioxide selective porous silicoaluminophosphate  

SciTech Connect (OSTI)

A Sr{sup 2+}-SAPO-34 material that displays superior CO2 adsorption selectivity and capacity was characterized via XPS and UV-vis spectroscopy to elucidate the valence state of strontium cations and framework silicon environment. Most importantly, the location of the strontium has been estimated from a Rietveld refinement analysis of synchrotron diffraction data. The XPS analysis indicated that the apparent valence state of the strontium is less than 2, an indication of its interaction with the large anionic framework. Furthermore, UV-vis tests pointed to changes in the silicon environment, plausibly related to this valence state or framework faulting. For the refinement, the analysis found that strontium occupied two unique sites: a site Sr1 slightly displaced from six-membered rings and a site Sr2 positioned at the top or bottom of the eight-membered rings. The latter position favors the interaction of the alkaline earth metal with CO{sub 2}, probably resulting in an enhanced electric field-quadrupole moment interaction.

Zhang, Li; Rivera-Ramos, Milton E.; Hernández-Maldonado, Arturo J. (Puerto Rico) [Puerto Rico

2014-05-28T23:59:59.000Z

254

Combined Utilization of Cation Exchanger and Neutral Receptor to Volume Reduction of Alkaline Tank Waste by Separation of Sodium Salts  

SciTech Connect (OSTI)

In this report, novel approaches to the selective liquid-liquid extraction separation of sodium hydroxide and sodium nitrate from high-level alkaline tank waste will be discussed. Sodium hydroxide can be successfully separated from alkaline tank-waste supernatants by weakly acidic lipophilic hydroxy compounds via a cation-exchange mechanism referred to as pseudo hydroxide extraction. In a multi-cycle process, as sodium hydroxide in the aqueous phase becomes depleted, it is helpful to have a neutral sodium receptor in the extraction system to exploit the high nitrate concentration in the waste solution to promote sodium removal by an ion-pair extraction process. Simultaneous utilization of an ionizable organic hydroxy compound and a neutral extractant (crown ether) in an organic phase results in the synergistic enhancement of ion exchange and improved separation selectivity due to the receptor's strong and selective sodium binding. Moreover, combination of the hydroxy compound and the crown ether provides for mutually increased solubility, even in a non-polar organic solvent. Accordingly, application of Isopar{reg_sign} L, a kerosene-like alkane solvent, becomes feasible. This investigation involves examination of such dual-mechanism extraction phases for sodium extraction from simulated and actual salt cake waste solutions. Sodium salts can be regenerated upon the contact of the loaded extraction phases with water. Finally, conditions of potential extraction/strip cycling will be discussed.

Levitskaia, Tatiana G.; Lumetta, Gregg J.; Moyer, Bruce A.

2004-03-29T23:59:59.000Z

255

Adsorption and desorption kinetics of cesium in an organic matter-rich soil saturated with different cations  

SciTech Connect (OSTI)

The fallout from nuclear weapons tests conducted on Bikini Atoll Island in 1954 resulted in contamination of soil with Cesium 137. To develop effective regimes for decontaminating the Bikini Atoll soil, the exchange of Cs for K, Na, and other cations on the soil must be understood. Samples of soils made homoionic with K, Na, or Ca were reacted with solutions containing Cs ions, and the quantities of Cs sorbed and the rates of exchange were measured. The samples were then reacted with solutions containing K, Na, or Ca, and the quantities of Cs desorbed and the rates of exchange were again measured. Samples made homoionic with Na had a greater ion exchange capacity than samples made homoionic with K, and, in both cases, the ion exchange capacity increased with the organic matter content of the soil. For samples pretreated with Ca, the ion exchange capacity is not related in a simple way to the organic matter content. The kinetics were assessed by plotting the rate of exchange vs. the time and vs. the quantity exchanged. A first-order equation was obeyed during most of the run in Cs desorption experiments and during a limited part of the run in Cs adsorption experiments. An increase in the rate of Cs exchange was observed at the beginning of the experiments especially for Cs adsorption. This increase is presumably due to an increase of the ionic strength of the liquid phase during the exchange process. 33 refs., 9 figs., 2 tabs.

Aharoni, C. (Technion-Israel Inst. of Technology, Haifa (Israel)); Pasricha, N.S. (Punjab Agricultural Univ., Ludihana (India)); Sparks, D.L. (Univ. of Delaware, Newark, DE (United States))

1993-10-01T23:59:59.000Z

256

Synthesis of cationic cerium compounds [Cp*2Ce(L)2][BPh4] (L = tetrahydrofuran or tetrahydrothiophene) and the crystal structure of the tetrahydrothiophene derivative  

Science Journals Connector (OSTI)

Protolysis of the cerium alkyl Cp*2CeCH(SiMe3)2 (1) by triethylammoniumtetraphenylborate provides a useful route to cationic cerium compounds [Cp*2Ce(L)2][BPh4] (2, L = tetrahydrofuran; 3, L= tetrahydrothiophene). The crystal structure of the tetrahydrothiophene derivative was determined by X-ray diffraction, which showed it to consist of discrete [Cp*2Ce(THT)2]+ and \\{BPh4ovbar\\} ions. The Cp* ring-centroids (cent) and the sulphur atoms in the cation form a distorted tetrahedron with a Cent-Ce- Cent angle of 134.57(6)° and Ce-S distances of 3.058(1) and 3.072(1)A?.

H.J. Heeres; A. Meetsma; J.H. Teuben

1991-01-01T23:59:59.000Z

257

A comparative study of optical absorption and photocatalytic properties of nanocrystalline single-phase anatase and rutile TiO{sub 2} doped with transition metal cations  

SciTech Connect (OSTI)

The effect of nanocrystalline TiO{sub 2} doping with transition metal cations (Cu{sup 2+}, Fe{sup 3+}, Co{sup 2+}, Cr{sup 3+}) on their optical absorption and photocatalytic properties was investigated. The obtained metal-doped TiO{sub 2} samples were characterized by X-ray diffraction, scanning electron microscopy, and UV-vis absorption spectroscopy. It is shown that doping effect on anatase (A) and rutile (R) properties is quite different, being much stronger and complicated on A than on R. Contrary to doped R, doped A revealed a significant red shift of the absorption edge along with the band gap narrowing. Photocatalytic activity of anatase increases upon doping in the order: AR/Co>R/Cu>R/Fe>R/Cr, indicating the inhibitory effect of impurity cations. This fact correlates with the decrease in the UV absorption of the doped rutile in the region of the Hg-lamp irradiation at 4.88 eV. - Graphical abstract: A red shift of the absorption edge of nanocrystalline single-phase anatase after doping with transition metal cations. Highlights: Black-Right-Pointing-Pointer Single-phase anatase and rutile powders surface-doped with transition metal cations. Black-Right-Pointing-Pointer Absorption edge and band gap of rutile do not change with surface doping. Black-Right-Pointing-Pointer Band gap of surface-doped anatase reduces being the lowest for A/Fe. Black-Right-Pointing-Pointer The surface-doping improves photocatalytic activity of anatase. Black-Right-Pointing-Pointer The surface-doping inhibits photocatalytic activity of rutile.

Kernazhitsky, L., E-mail: kern@iop.kiev.ua [Department of Photoactivity, Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev 03650 (Ukraine); Shymanovska, V.; Gavrilko, T.; Naumov, V. [Department of Photoactivity, Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev 03650 (Ukraine)] [Department of Photoactivity, Institute of Physics, National Academy of Sciences of Ukraine, Prospect Nauki 46, Kiev 03650 (Ukraine); Kshnyakin, V. [Department of Physics, Sumy State University, Rymsky-Korsakov Str. 2, Sumy 40007 (Ukraine)] [Department of Physics, Sumy State University, Rymsky-Korsakov Str. 2, Sumy 40007 (Ukraine); Khalyavka, T. [Laboratory of Photochemistry of Disperse Materials, Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Gen. Naumov Str. 13, Kiev 03164 (Ukraine)] [Laboratory of Photochemistry of Disperse Materials, Institute for Sorption and Problems of Endoecology, National Academy of Sciences of Ukraine, Gen. Naumov Str. 13, Kiev 03164 (Ukraine)

2013-02-15T23:59:59.000Z

258

The Effect of Temperature, Cations, and Number of Acyl Chains on the Lamellar to Non-Lamellar Transition in Lipid-A Membranes: A Microscopic View  

SciTech Connect (OSTI)

Lipopolysaccharides (LPS) are the main constituent of the outer bacterial membrane of Gram-negative bacteria. Lipid-A is the structural region of LPS that interacts with the innate immune system and induces inflammatory responses. It is formed by a phosphorylated ?-d-glucosaminyl-(1?6)-?-N-glucosamine disaccharide backbone containing ester-linked and amide-linked long-chain fatty acids, which may vary in length and number depending on the bacterial strains and the environment. Phenotypical variation (i.e., number of acyl chains), cation type, and temperature influence the phase transition, aggregate structure, and endotoxic activity of Lipid-A. We have applied an extension of the GROMOS force field 45a4 carbohydrate parameter set to investigate the behavior of hexa- and pentaacylated Lipid-A of Pseudomonas aeruginosa at two temperatures (300 and 328 K) and in the presence of mono- and divalent cations (represented by Ca2+ and Na+, respectively) through molecular dynamics simulations. The distinct phase of Lipid-A aggregates was characterized by structural properties, deuterium order parameters, the molecular shape of the lipid units (conical versus cylindrical), and molecular packing. Our results show that Na+ ions induce a transition from the lamellar to nonlamellar phase. In contrast, the bilayer integrity is maintained in the presence of Ca2+ ions. Through these findings, we present microscopic insights on the influence of different cations on the molecular behavior of Lipid-A associated with the lamellar to nonlamellar transition.

Pontes, Frederico J.; Rusu, Victor H.; Soares, Thereza A.; Lins, Roberto D.

2012-05-24T23:59:59.000Z

259

GeoT User's Guide: A Computer Program for Multicomponent Geothermometry and Geochemical Speciation, Version 1.4  

E-Print Network [OSTI]

Variable: Format: NAME_S ICON TRIAL_C A I F INPUT_C F NAME_+ and H 2 O), in any order ICON: flag to specify the meaningactual species. For pH, use ICON=3 and input 10 –pH . The

Sonnenthal, N. Spycher, N., L. Peiffer, and E.

2014-01-01T23:59:59.000Z

260

Unraveling the voltage fade mechanism in layer Li-Mn-rich electrode: formation of the tetrahedral cations for spinel conversion  

SciTech Connect (OSTI)

Discovery of high-voltage layered lithium-and manganese-rich (LMR) composite oxide electrode has dramatically enhanced the energy density of current Li-ion energy storage systems. However, practical usage of these materials is currently not viable because of their inability to maintain a consistent voltage profile (voltage fading) during subsequent charge-discharge cycles. This report rationalizes the cause of this voltage fade by providing the evidence of layer to spinel-like (LSL) structural evolution pathways in the host Li1.2Mn0.55Ni0.15Co0.1O2 LMR composite oxide. By employing neutron powder diffraction, and temperature dependent magnetic susceptibility, we show that LSL structural rearrangement in LMR oxide occurs through a tetrahedral cation intermediate via: i) diffusion of lithium atoms from octahedral to tetrahedral sites of the lithium layer [(LiLioct LiLitet] which is followed by the dispersal of the lithium ions from the adjacent octahedral site of the metal layer to the tetrahedral sites of lithium layer [LiTM oct LiLitet]; and ii) migration of Mn from the octahedral sites of the transition metal layer to the permanent octahedral site of lithium layer via tetrahedral site of lithium layer [MnTMoct MnLitet MnLioct)]. The findings opens the door to the potential routes to mitigate this atomic restructuring in the high-voltage LMR composite oxide cathodes by manipulating the composition/structure for practical use in high-energy-density lithium-ion batteries.

Mohanty, Debasish [ORNL; Li, Jianlin [ORNL; Abraham, Daniel P [Argonne National Laboratory (ANL); Huq, Ashfia [ORNL; Payzant, E Andrew [ORNL; Wood III, David L [ORNL; Daniel, Claus [ORNL

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
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261

cation migration | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

leads are available at this time. Iodine Solubility in Low-Activity Waste Borosilicate Glass at 1000 °C. Abstract: The purpose of this study was to determine the solubility of...

262

Structure of gramicidin D-RbCl complex at atomic resolution from low-temperature synchrotron data: interactions of double-stranded gramicidin channel contents and cations with channel wall  

SciTech Connect (OSTI)

Gramicidin D (gD) is a naturally occurring ionophoric antibiotic that forms membrane channels specific for monovalent cations. The crystal structure of the RbCl complex of gD has been determined at 1.14 {angstrom} resolution from low-temperature (100 K) synchrotron-radiation data with a final R of 16%. The structure was refined with anisotropic temperature factors for all non-H atoms and with partial occupancies for many of them. The asymmetric unit in the crystal contains four crystallographically independent molecules that form two right-handed antiparallel double-stranded dimers. There are seven distinct rubidium-binding sites in each dimeric channel. The occupancy factors of Rb cations are between 0.11 and 0.35 and the total ion contents of the two crystallographically independent channels are 1.59 and 1.22 ions, respectively. Although each channel is 'chemically symmetrical', the side-chain conformations, the distributions of rubidium cations and their binding sites in the two independent channels are not. Cations are 'coordinated' by delocalized {pi}-electrons of three to five carbonyl groups that together with peptide backbone chains form the gramicidin channel walls. The water:cation ratio in the channel interior is four or five:one, and five or six waters separate Rb cations during their passage through the channel.

Glówka, M.L.; Olczak, A.; Bojarska, J.; Szczesio, M.; Duax, W.L.; Burkhart, B.M.; Pangborn, W.A.; Langs, D.A.; Wawrzak, Z. (Poland); (NWU); (Hauptman)

2010-03-05T23:59:59.000Z

263

Selectivity Control in Synergistic Liquid-Liquid Anion Exchange of Univalent Anions via Structure-Specific Cooperativity between Quaternary Ammonium Cations and Anion Receptors  

SciTech Connect (OSTI)

Two anion receptors enhance liquid-liquid anion exchange when added to quaternary alkylammonium chloride anion exchangers, but with a striking dependence upon the structure of the alkylammonium cation. Two anion receptors were investigated, meso-octamethylcalix[4]pyrrole (C4P) and the bisthiourea tweezer 1,1'-(propane-1,3-diyl)bis(3-(4-sec-butylphenyl)thiourea (BTU). C4P has the unique ability in its cone anion-binding conformation to accept an appropriately sized electropositive species in the resulting cup formed by its four electron-rich pyrrole groups, while BTU is not expected to be predisposed for a specific host-guest interaction with the quaternary ammonium cations. It was therefore hypothesized that synergism between C4P and methyltri(C8,10)alkylammonium chloride (Aliquat 336) would be uniquely pronounced owing to insertion of the methyl group of the Aliquat cation into the C4P cup, and we present herein data supporting this expectation. While synergism is comparatively weak for both exchangers with the BTU receptor, synergism between C4P and Aliquat 336 is indeed so strong that anion exchange prefers chloride over more extractable nitrate and trifluoroacetate, effectively overcoming the ubiquitous Hofmeister bias. A thermochemical analysis of synergistic anion exchange has been provided for the first time, unraveling the observed selectivity behavior and resulting in the estimation of binding constants for C4P with the ion pairs of A336+ with Cl , Br , OAcF3 , NO3 , and I . The uniquely strong positive cooperativity between A336 and C4P underscores the advantage of a supramolecular approach in the design of synergistic anion exchange systems.

Borman, Christopher J [ORNL; Bonnesen, Peter V [ORNL; Moyer, Bruce A [ORNL

2012-01-01T23:59:59.000Z

264

Water-Soluble Complexes from Random Copolymer and Oppositely Charged Surfactant. 2. Complexes of Poly(ethylene glycol)-Based Cationic Random Copolymer and Bile Salts  

Science Journals Connector (OSTI)

Water-Soluble Complexes from Random Copolymer and Oppositely Charged Surfactant. 2. Complexes of Poly(ethylene glycol)-Based Cationic Random Copolymer and Bile Salts ... Measurements of light scattering intensity were performed at room temperature (22 °C) on a multiangle light scattering detector (DAWN EOS fitted with a Wyatt QELS correlator (Wyatt Technology Corp.)), having a 30 mW (GaAs, gallium arsenide) laser emitting vertically polarized light at wavelength ? = 690 nm. ... Turbidimetric titration was used to determine the solubility of the polymer?surfactant complexes of various compositions. ...

C. K. Nisha; Sunkara V. Manorama; Jayachandran N. Kizhakkedathu; Souvik Maiti

2004-08-28T23:59:59.000Z

265

Water-Soluble Complexes from Random Copolymer and Oppositely Charged Surfactant. 1. Complexes of Poly(ethylene glycol)-Based Cationic Random Copolymer and Sodium Dodecyl Sulfate  

Science Journals Connector (OSTI)

Water-Soluble Complexes from Random Copolymer and Oppositely Charged Surfactant. 1. Complexes of Poly(ethylene glycol)-Based Cationic Random Copolymer and Sodium Dodecyl Sulfate ... Preliminary studies on the solubility of the complexes by turbidity measurements with one of the most studied anionic surfactants, sodium dodecyl sulfate (SDS), demonstrate that complexes of the polymer with 68 mol % PEG content are insoluble in water. ... (angles are measured with respect to the direction of the laser beam) equipped with a 30 mW (GaAs, gallium arsenide) laser emitting vertically polarized light at wavelength ? = 690 nm. ...

C. K. Nisha; Pratyay Basak; Sunkara V. Manorama; Souvik Maiti; Kizhakkedathu N. Jayachandran

2003-02-26T23:59:59.000Z

266

Zircon-scale insights into the history of a Supervolcano, Bishop Tuff, Long Valley, California, with implications for the Ti-in-zircon geothermometer  

Science Journals Connector (OSTI)

Rapid evacuation of magma from the chamber responsible for the Bishop Tuff of Long Valley caldera, eastern California (over ~ 6...1; Wilson and Hildreth 1997), provides a nearly instantaneous glimpse into a volum...

Mary R. Reid; Jorge A. Vazquez…

2011-02-01T23:59:59.000Z

267

Reaction of Cp*(CO)2ReRe(CO)2Cp* with Alkynes Produces Dimetallacyclopentenones Cp*(CO)2Re(?-?1,?3-CRCR‘CO)Re(CO)Cp* Which React with Acid To Form Cationic Bridging Vinyl Complexes  

Science Journals Connector (OSTI)

Reaction of Cp*(CO)2ReRe(CO)2Cp* with Alkynes Produces Dimetallacyclopentenones Cp*(CO)2Re(?-?1,?3-CRCR‘CO)Re(CO)Cp* Which React with Acid To Form Cationic Bridging Vinyl Complexes ... Cp*(CO)2ReRe(CO)2Cp* reacted with terminal alkynes HC?CR to produce dimetallacyclopentenones Cp*(CO)2Re(?-?1,?3-CHCRCO)Re(CO)Cp*. ... Protonation of the dimetallacyclopentenones with CF3CO2H produced (?-vinyl)dirhenium cations [Cp*(CO)2Re(?-?1,?2-CHCHR)Re(CO)2Cp*]+. ...

Charles P. Casey; Ronald S. Cariño; Hiroyuki Sakaba

1997-02-04T23:59:59.000Z

268

Novel chemically stable Ba3Ca1.18Nb1.82-xYxO9- proton conductor: improved proton conductivity through tailored cation ordering  

SciTech Connect (OSTI)

Simple perovskite-structured proton conductors encounter significant challenges to simultaneously achieving excellent chemical stability and proton conductivity that are desirable for many important applications in energy conversion and storage. This work demonstrates that Y-doped complex-perovskite-structured Ba3Ca1.18Nb1.82 xYxO9 materials possess both improved proton conductivity and exceptional chemical stability. Neutron powder diffraction refinement revealed a Fm3 m perovskite-structure and increased oxygen vacancy concentration due to the Y doping. High-resolution TEM analysis confirmed the perturbation of the B site cation ordering in the structure for the Ba3Ca1.18Nb1.82 xYxO9 materials. Such combined effects led to improved proton conductivity with a value of 5.3 10 3 S cm 1 at 600 C for Ba3Ca1.18Nb1.52Y0.3O9 (BCNY0.3), a value 2.4 times higher compared with that of the undoped Ba3Ca1.18Nb1.82O9 . The Ba3Ca1.18Nb1.82 xYxO9 materials showed remarkable chemical stability toward water and demonstrated no observable reactions to CO2 exposure. Ionic transport number studies showed that BCNY0.3 had predominantly proton conduction below 600 C. Solid oxide fuel cells using BCNY0.3 as an electrolyte demonstrated cell power output of 103 mW cm 2 at 750 C. These results suggest that a doping strategy that tailors the cation ordering in complex perovskites provides a new direction in the search for novel proton conducting ceramics.

Wang, Siwei [University of South Carolina, Columbia] [University of South Carolina, Columbia; Chen, Yan [ORNL] [ORNL; Fang, Shumin [University of South Carolina, Columbia] [University of South Carolina, Columbia; Zhang, Lingling [University of South Carolina, Columbia] [University of South Carolina, Columbia; Tang, Ming [Los Alamos National Laboratory (LANL)] [Los Alamos National Laboratory (LANL); An, Ke [ORNL] [ORNL; Brinkman, Dr. Kyle S. [Savannah River National Laboratory (SRNL), Aiken, S.C.] [Savannah River National Laboratory (SRNL), Aiken, S.C.; Chen, Fanglin [University of South Carolina, Columbia] [University of South Carolina, Columbia

2014-01-01T23:59:59.000Z

269

Appearedin Proc. ACM Software Testing Analysis and Veri cation Symp. TAV3-SIGSOFT89, pp. 179-186, Dec. 1989. 1 Estimating the Number of Test Cases Required to Satisfy the All-du-paths  

E-Print Network [OSTI]

discriminating structural testing crite- ria are based on data ow analysis. Rapps and Weyuker de ne a familyAppearedin Proc. ACM Software Testing Analysis and Veri cation Symp. TAV3-SIGSOFT89, pp. 179-186, Dec. 1989. 1 Estimating the Number of Test Cases Required to Satisfy the All-du-paths Testing

Bieman, James M.

270

Property:ThermalInfo | Open Energy Information  

Open Energy Info (EERE)

Property Property Edit with form History Facebook icon Twitter icon » Property:ThermalInfo Jump to: navigation, search Property Name ThermalInfo Property Type Text Subproperties This property has the following 93 subproperties: A Acoustic Logs Active Seismic Methods Active Sensors Aeromagnetic Survey Airborne Electromagnetic Survey Analytical Modeling C Caliper Log Cation Geothermometers Cement Bond Log Conceptual Model Controlled Source Frequency-Domain Magnetics Cross-Dipole Acoustic Log Cuttings Analysis D Data Acquisition-Manipulation Data Collection and Mapping Data Techniques Data and Modeling Techniques Density Log Direct-Current Resistivity Survey Drilling Methods E Earth Tidal Analysis Electric Micro Imager Log Electromagnetic Sounding Methods Elemental Analysis with Fluid Inclusion

271

Propane ammoxidation over the Mo-V-Te-Nb-O M1 phase: Reactivity of surface cations in hydrogen abstraction steps  

SciTech Connect (OSTI)

Density functional theory calculations (GGA-PBE) have been performed to investigate the adsorption of C3 (propane, isopropyl, propene, and allyl) and H species on the proposed active center present in the surface ab planes of the bulk Mo-V-Te-Nb-O M1 phase in order to better understand the roles of the different surface cations in propane ammoxidation. Modified cluster models were employed to isolate the closely spaced V=O and Te=O from each other and to vary the oxidation state of the V cation. While propane and propene adsorb with nearly zero adsorption energy, the isopropyl and allyl radicals bind strongly to V=O and Te=O with adsorption energies, {Delta}E, being {le} -1.75 eV, but appreciably more weakly on other sites, such as Mo=O, bridging oxygen (Mo-O-V and Mo-O-Mo), and empty metal apical sites ({Delta}E > -1 eV). Atomic H binds more strongly to Te = O ({Delta}E {le} -3 eV) than to all the other sites, including V = O ({Delta}E = -2.59 eV). The reduction of surface oxo groups by dissociated H and their removal as water are thermodynamically favorable except when both H atoms are bonded to the same Te=O. Consistent with the strong binding of H, Te=O is markedly more active at abstracting the methylene H from propane (E{sub a} {le} 1.01 eV) than V = O (E{sub a} = 1.70 eV on V{sup 5+} = O and 2.13 eV on V{sup 4+} = O). The higher-than-observed activity and the loose binding of Te = O moieties to the mixed metal oxide lattice of M1 raise the question of whether active Te = O groups are in fact present in the surface ab planes of the M1 phase under propane ammoxidation conditions.

Muthukumar, Kaliappan [University of Cincinnati; Yu, Junjun [University of Cincinnati; Xu, Ye [ORNL; Guliants, Vadim V. [University of Cincinnati

2011-01-01T23:59:59.000Z

272

Preparation of water-soluble ?-cyclodextrin/poly(acrylic acid)/graphene oxide nanocomposites as new adsorbents to remove cationic dyes from aqueous solutions  

Science Journals Connector (OSTI)

Abstract Novel nanocomposites of ?-cyclodextrin/poly(acrylic acid) grafted onto graphene oxide (?-CD/PAA/GO) were successfully synthesized for the first time using an esterification reaction, and they were used to remove the cationic dyes methylene blue (MB) and safranine T (ST) from aqueous solutions. The as-prepared ?-CD/PAA/GO nanocomposites were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and X-ray diffraction analysis. The ?-CD/PAA/GO nanocomposites showed excellent water dispersibility because of the hydrophilicity of the polymer. The adsorption isotherms fitted the Langmuir isotherm model. The maximum adsorption capacities were 247.99 mg g?1 for MB and 175.49 mg g?1 for ST, and these are much higher than those of other carbon-based adsorbents that have been described in the literature. This was attributed to the high concentration of functional groups in the nanocomposites. Repeated MB and ST adsorption and desorption cycles showed that the ?-CD/PAA/GO nanocomposites could be used repeatedly, and their adsorption capacities did not change significantly after five cycles. The fast and efficient adsorption of MB and ST by the ?-CD/PAA/GO nanocomposites from aqueous solutions suggested that these novel nanocomposites may be ideal candidates for removing dyes during water treatment.

Jinshui Liu; Guoning Liu; Wenxiu Liu

2014-01-01T23:59:59.000Z

273

Elucidating the mechanism behind the stabilization of multi-charged metal cations in water: A case study of the electronic states of microhydrated Mg2+, Ca2+ and Al3+”  

SciTech Connect (OSTI)

Metal atoms typically have second and higher ionization potentials (IPs) that are larger than the IP of water, resulting in the Coulombic explosion of the first few [M(H2O)n]+q (q ? 2) clusters as the M+ + (H2O)n + or MOH+ + H3O+(H2O)n energy levels are energetically more stable than the M2+ + (H2O)n ones for small n. We present a theoretical analysis of the various electronic states correlating with the above channels that are involved in the sequential hydration of the Ca2+, Mg2+ and Al3+ cations with up to six water molecules that, for the first time, quantifies their relative shift with the degree of solvation accounting for the observed stabilization of those multi-charged metal cations in an aqueous solution. *

Miliordos, Evangelos; Xantheas, Sotiris S.

2014-04-21T23:59:59.000Z

274

High affinity capture and concentration of quinacrine in polymorphonuclear neutrophils via vacuolar ATPase-mediated ion trapping: Comparison with other peripheral blood leukocytes and implications for the distribution of cationic drugs  

SciTech Connect (OSTI)

Many cationic drugs are concentrated in acidic cell compartments due to low retro-diffusion of the protonated molecule (ion trapping), with an ensuing vacuolar and autophagic cytopathology. In solid tissues, there is evidence that phagocytic cells, e.g., histiocytes, preferentially concentrate cationic drugs. We hypothesized that peripheral blood leukocytes could differentially take up a fluorescent model cation, quinacrine, depending on their phagocytic competence. Quinacrine transport parameters were determined in purified or total leukocyte suspensions at 37 °C. Purified polymorphonuclear leukocytes (PMNLs, essentially neutrophils) exhibited a quinacrine uptake velocity inferior to that of lymphocytes, but a consistently higher affinity (apparent K{sub M} 1.1 vs. 6.3 ?M, respectively). However, the vacuolar (V)-ATPase inhibitor bafilomycin A1 prevented quinacrine transport or initiated its release in either cell type. PMNLs capture most of the quinacrine added at low concentrations to fresh peripheral blood leukocytes compared with lymphocytes and monocytes (cytofluorometry). Accumulation of the autophagy marker LC3-II occurred rapidly and at low drug concentrations in quinacrine-treated PMNLs (significant at ? 2.5 ?M, ? 2 h). Lymphocytes contained more LAMP1 than PMNLs, suggesting that the mass of lysosomes and late endosomes is a determinant of quinacrine uptake V{sub max}. PMNLs, however, exhibited the highest capacity for pinocytosis (uptake of fluorescent dextran into endosomes). The selectivity of quinacrine distribution in peripheral blood leukocytes may be determined by the collaboration of a non-concentrating plasma membrane transport mechanism, tentatively identified as pinocytosis in PMNLs, with V-ATPase-mediated concentration. Intracellular reservoirs of cationic drugs are a potential source of toxicity (e.g., loss of lysosomal function in phagocytes). - Highlights: • Quinacrine is concentrated in acidic organelles via V-ATPase-mediated ion trapping. • Human peripheral blood leukocytes capture and concentrate quinacrine. • Polymorphonuclear leukocytes do so with higher apparent affinity. • Polymorphonuclear are also more competent than lymphocytes for pinocytosis.

Roy, Caroline; Gagné, Valérie; Fernandes, Maria J.G.; Marceau, François, E-mail: francois.marceau@crchul.ulaval.ca

2013-07-15T23:59:59.000Z

275

Li0.93[Li0.21Co0.28Mn0.51]O2 nanoparticles for lithium battery cathode material made by cationic exchange from K-birnessite  

E-Print Network [OSTI]

Li0.93[Li0.21Co0.28Mn0.51]O2 nanoparticles for lithium battery cathode material made by cationic arising from the Jahn­Teller active Mn3+ ion [6,7]. These cathode mate- rials transformed to a spinel in lithium concentration. The as-prepared cathode particle has plate-like hexagonal morphology with a size

Cho, Jaephil

276

Coupling of porous filtration and ion-exchange membranes in an electrodialysis stack and impact on cation selectivity: A novel approach for sea water demineralization and the production of physiological water  

Science Journals Connector (OSTI)

Conventional electrodialysis (ED) and electrodialysis with ultrafiltration (EDUF) or nanofiltration (EDNF) membrane treatments were carried-out for partial desalination of sea water and to evaluate their potential for the production of physiological water. A demineralization rate of 10.6% was obtained with the EDNF and of 40.25% with EDUF and conventional ED processes. The nanofiltration membrane, due to its high electrical resistance, slowed down the migrations of ions. Moreover, the use of an ultrafiltration membrane had no significant effect on the demineralization rate of sea water and the electrodialytic parameters in comparison with the use of conventional ED membranes. A demineralization rate between 20.5 and 30.1% was obtained for each cation analyzed following EDNF treatments and between 43.3 and 64.4% when conventional ED or EDUF was used. Moreover, the decrease in the concentration of monovalent ions was slightly larger than for divalent ions in the case of ED and EDUF while for EDNF, the higher decrease was observed for calcium ion. This means that the replacement of a cation-exchange membrane by an ultrafiltration membrane would not change the selectivity of the process for ion separation but with a nanofiltration membrane a cation-selectivity appears.

Laurent Bazinet; Marianne Moalic

2011-01-01T23:59:59.000Z

277

Nanoscale Phase Separation, Cation Ordering, and Surface Oxygen Chemistry in Pristine Li1.2Ni0.2Mn0.6O2 for Li-Ion Batteries  

SciTech Connect (OSTI)

Li-rich layered material Li1.2Ni0.2Mn0.6O2 possesses high voltage and high specific capacity, which makes it an attractive candidate for the transportation industry and sustainable energy storage systems. The rechargeable capacity of the Li-ion battery is linked largely to the structural stability of the cathode materials during the charge-discharge cycles. However, the structure and cation distribution in pristine (un-cycled) Li1.2Ni0.2Mn0.6O2 have not yet been fully characterized. Using a combination of aberration-corrected scanning/transmission electron microscopy, X-ray dispersive energy spectroscopy (XEDS), electron energy loss spectroscopy (EELS), and complementary multislice image simulation, we have probed the crystal structure, cation/anion distribution, and electronic structure of Li1.2Ni0.2Mn0.6O2 nanoparticle. We discovered that the electronic structure and valence state of transition metal ions show significant variations, which have been identified to be attributed to the oxygen deficiency near the particle surfaces. Characterization of the nanoscale phase separation and cation ordering in the pristine material are critical for understanding the capacity and voltage fading of this material for battery application.

Gu, Meng; Genc, Arda; Belharouak, Ilias; Wang, Dapeng; Amine, Khalil; Thevuthasan, Suntharampillai; Baer, Donald R.; Zhang, Jiguang; Browning, Nigel D.; Liu, Jun; Wang, Chong M.

2013-05-14T23:59:59.000Z

278

Site occupancy and cation binding states in reduced polycrystalline Sr{sub x}Ba{sub 1?x}Nb{sub 2}O{sub 6}  

SciTech Connect (OSTI)

Site occupancy and cation binding states in the proposed thermoelectric n-type oxide Sr{sub x}Ba{sub 1?x}Nb{sub 2}O{sub 6} (SBN100x) were investigated using X-ray photoelectron spectroscopy (XPS). Sr 3d XPS spectra from unreduced polycrystalline SBN100x with various compositions contained two distinct spin-orbit doublets corresponding to Sr occupying either A1 or A2 positions in the SBN lattice; the higher binding energy state was associated with Sr ions at A2 sites, presumably due to their increased coordination over Sr at A1 sites. To gain insight into optimizing the thermoelectric properties of reduced SBN, sintered SBN50 specimens were reduced in Ar/H{sub 2} or N{sub 2}/H{sub 2} ambient. A decrease in the average Nb valence was observed in Nb 3d photoemission through the growth of low-binding energy components after reduction in either environment; evidence of surface NbN formation was apparent with longer reducing times in N{sub 2}/H{sub 2}. Both the single-component Ba 3d emission and the A2 component of the Sr 3d spectra show shifting to lower binding energy as the reduction time is increased, supporting the hypothesis of preferential oxygen vacancy formation adjacent to A2 sites. X-ray diffraction patterns revealed the formation of NbO{sub 2} in both reducing environments; in the case of extended reduction in N{sub 2}/H{sub 2}, NbO{sub 2} is gradually converted to NbN phases. Given the known properties of metallic NbN and semiconducting NbO{sub 2}, the findings obtained here may be used to maximize the thermoelectric performance of SBN via the fabrication of composite structures containing both NbO{sub 2} and NbN.

Dandeneau, Christopher S., E-mail: dandec@u.washington.edu; Yang, YiHsun; Ohuchi, Fumio S. [Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States)] [Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 (United States); Krueger, Benjamin W.; Olmstead, Marjorie A. [Department of Physics, University of Washington, Seattle, Washington 98195 (United States)] [Department of Physics, University of Washington, Seattle, Washington 98195 (United States); Bordia, Rajendra K. [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States)] [Department of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634 (United States)

2014-03-10T23:59:59.000Z

279

High cation transport polymer electrolyte  

DOE Patents [OSTI]

A solid state ion conducting electrolyte and a battery incorporating same. The electrolyte includes a polymer matrix with an alkali metal salt dissolved therein, the salt having an anion with a long or branched chain having not less than 5 carbon or silicon atoms therein. The polymer is preferably a polyether and the salt anion is preferably an alkyl or silyl moiety of from 5 to about 150 carbon/silicon atoms.

Gerald, II, Rex E. (Brookfield, IL); Rathke, Jerome W. (Homer Glen, IL); Klingler, Robert J. (Westmont, IL)

2007-06-05T23:59:59.000Z

280

Structural evolution of the double perovskites Sr{sub 2}B'UO{sub 6} (B' = Mn, Fe, Co, Ni, Zn) upon reduction: Magnetic behavior of the uranium cations  

SciTech Connect (OSTI)

Highlights: {yields} Evolution of the double perovskites Sr{sub 2}B'UO{sub 6} upon reduction were studied by XRPD. {yields} Orthorhombic (Pnma) disordered perovskites SrB'{sub 0.5-x}U{sub 0.5+x}O{sub 3} were obtained at 900 {sup o}C. {yields} U{sup 5+/4+} and Zn{sup 2+} cations are distributed at random over the octahedral positions. {yields} AFM ordering for the perovskite with B' = Zn appears below 30 K. -- Abstract: We describe the preparation of five perovskite oxides obtained upon reduction of Sr{sub 2}B'UO{sub 6} (B' = Mn, Fe, Co, Ni, Zn) with H{sub 2}/N{sub 2} (5%/95%) at 900 {sup o}C during 8 h, and their structural characterization by X-ray powder diffraction (XRPD). During the reduction process there is a partial segregation of the elemental metal when B' = Co, Ni, Fe, and the corresponding B'O oxide when B' = Mn, Zn. Whereas the parent, oxygen stoichiometric double perovskites Sr{sub 2}B'UO{sub 6} are long-range ordered concerning B' and U cations. The crystal structures of the reduced phases, SrB'{sub 0.5-x}U{sub 0.5+x}O{sub 3} with 0.37 < x < 0.27, correspond to simple, disordered perovskites; they are orthorhombic, space group Pnma (No. 62), with a full cationic disorder at the B site. Magnetic measurements performed on the phase with B' = Zn, indicate uncompensated antiferromagnetic ordering of the U{sup 5+}/U{sup 4+} sublattice below 30 K.

Pinacca, R.M., E-mail: rmp@unsl.edu.ar [Area de Quimica General e Inorganica 'Dr. Gabino F. Puelles', Departamento de Quimica, Facultad de Quimica, Bioquimica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis (Argentina); Viola, M.C.; Pedregosa, J.C. [Area de Quimica General e Inorganica 'Dr. Gabino F. Puelles', Departamento de Quimica, Facultad de Quimica, Bioquimica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis (Argentina)] [Area de Quimica General e Inorganica 'Dr. Gabino F. Puelles', Departamento de Quimica, Facultad de Quimica, Bioquimica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis (Argentina); Carbonio, R.E. [INFIQC (CONICET), Departamento de Fisicoquimica, Facultad de Ciencias Quimicas, Universidad Nacional de Cordoba, Ciudad Universitaria, X5000HUA Cordoba (Argentina)] [INFIQC (CONICET), Departamento de Fisicoquimica, Facultad de Ciencias Quimicas, Universidad Nacional de Cordoba, Ciudad Universitaria, X5000HUA Cordoba (Argentina); Lope, M.J. Martinez; Alonso, J.A. [Instituto de Ciencia de Materiales de Madrid, C.S.I.C., Cantoblanco, 28049 Madrid (Spain)] [Instituto de Ciencia de Materiales de Madrid, C.S.I.C., Cantoblanco, 28049 Madrid (Spain)

2011-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Compound and Elemental Analysis At Lassen Volcanic National Park Area  

Open Energy Info (EERE)

Janik & Mclaren, 2010) Janik & Mclaren, 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Lassen Volcanic National Park Area (Janik & Mclaren, 2010) Exploration Activity Details Location Lassen Volcanic National Park Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Analyses of eight well samples taken consecutively during the flow test showed an inverse correlation between NH3 and Cl_ concentrations. The last sample taken had a pH of 8.35 and contained 2100 ppm Cl_ and 0.55 ppm NH3. Ratios of Na+/K+ and Na+/Cl_ remained nearly constant throughout the flow test. Cation geothermometers (with inherent uncertainties of at least

282

Property:ExplorationCostPerMetric | Open Energy Information  

Open Energy Info (EERE)

ExplorationCostPerMetric ExplorationCostPerMetric Jump to: navigation, search Property Name ExplorationCostPerMetric Property Type String Description the unit ratio denominator for exploration cost Allows Values 100 feet cut;30 foot core;compound;day;element;foot;hour;mile;point;process;sample;sq. mile;station;Subject;well Subproperties This property has the following 107 subproperties: A Active Seismic Methods Active Seismic Techniques Active Sensors Analytical Modeling B Borehole Seismic Techniques C Cation Geothermometers Chemical Logging Conceptual Model Core Holes Cross-Dipole Acoustic Log D DC Resistivity Survey (Dipole-Dipole Array) DC Resistivity Survey (Mise-Á-La-Masse) DC Resistivity Survey (Pole-Dipole Array) DC Resistivity Survey (Schlumberger Array) DC Resistivity Survey (Wenner Array)

283

Interpretation of chemical analyses of waters collected from two geothermal  

Open Energy Info (EERE)

Interpretation of chemical analyses of waters collected from two geothermal Interpretation of chemical analyses of waters collected from two geothermal wells at Coso, California Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Interpretation of chemical analyses of waters collected from two geothermal wells at Coso, California Details Activities (1) Areas (1) Regions (0) Abstract: Wellhead and downhole water samples were collected and analyzed from a 114.3-m well at Coso Hot Springs (Coso No. 1) and a 1477-m well (CGEH No. 1) 3.2 km to the west. The same chloride concentration is present in hot waters entering both wells (about 2350 mg/kg), indicating that a hot-water-dominated geothermal system is present. The maximum measured temperatures are 142 degrees C in the Coso No. 1 well and 195 degrees C in the CGEH No. 1 well. Cation and sulfate isotope geothermometers indicate

284

Property:ExplorationTimePerMetric | Open Energy Information  

Open Energy Info (EERE)

ExplorationTimePerMetric ExplorationTimePerMetric Jump to: navigation, search Property Name ExplorationTimePerMetric Property Type String Description the unit ratio denominator for exploration time Allows Values job;10 mile;10 stn;100 mile;sq. mile;foot Subproperties This property has the following 121 subproperties: A Active Seismic Methods Active Seismic Techniques Active Sensors Analytical Modeling B Borehole Seismic Techniques C Cation Geothermometers Chemical Logging Compound and Elemental Analysis Conceptual Model Core Holes Cross-Dipole Acoustic Log D DC Resistivity Survey (Dipole-Dipole Array) DC Resistivity Survey (Mise-Á-La-Masse) DC Resistivity Survey (Pole-Dipole Array) DC Resistivity Survey (Schlumberger Array) DC Resistivity Survey (Wenner Array) Data Collection and Mapping Data Techniques

285

Property:LithologyInfo | Open Energy Information  

Open Energy Info (EERE)

LithologyInfo LithologyInfo Jump to: navigation, search Property Name LithologyInfo Property Type Text Subproperties This property has the following 93 subproperties: 2 2-M Probe Survey A Active Seismic Methods Active Sensors Aerial Photography Aeromagnetic Survey Analytical Modeling C Caliper Log Cation Geothermometers Cement Bond Log Chemical Logging Compound and Elemental Analysis Conceptual Model Controlled Source Frequency-Domain Magnetics Cross-Dipole Acoustic Log D Data Acquisition-Manipulation Data Collection and Mapping Data Techniques Data and Modeling Techniques Drilling Methods E Electric Micro Imager Log Electromagnetic Sounding Methods Elemental Analysis with Fluid Inclusion F FLIR Fault Mapping Field Techniques Flow Test Fluid Inclusion Analysis Fluid Lab Analysis Formation Testing Techniques

286

Diffusion of Ca and Mg in Calcite  

SciTech Connect (OSTI)

The self-diffusion of Ca and the tracer diffusion of Mg in calcite have been experimentally measured using isotopic tracers of {sup 25}Mg and {sup 44}Ca. Natural single crystals of calcite were coated with a thermally-sputtered oxide thin film and then annealed in a CO{sub 2} gas at one atmosphere total pressure and temperatures from 550 to 800 C. Diffusion coefficient values were derived from the depth profiles obtained by ion microprobe analysis. The resultant activation energies for Mg tracer diffusion and Ca self-diffusion are respectively: E{sub a}(Mg) = 284 {+-} 74 kJ/mol and E{sub a}(Ca) = 271 {+-} 80 kJ/mol. For the temperature ranges in these experiments, the diffusion of Mg is faster than Ca. The results are generally consistent in magnitude with divalent cation diffusion rates obtained in previous studies and provide a means of interpreting the thermal histories of carbonate minerals, the mechanism of dolomitization, and other diffusion-controlled processes. The results indicate that cation diffusion in calcite is relatively slow and cations are the rate-limiting diffusing species for the deformation of calcite and carbonate rocks. Application of the calcite-dolomite geothermometer to metamorphic assemblages will be constrained by cation diffusion and cooling rates. The direct measurement of Mg tracer diffusion in calcite indicates that dolomitization is unlikely to be accomplished by Mg diffusion in the solid state but by a recrystallization process.

Cygan, R.T.; Fisler, D.K.

1999-02-10T23:59:59.000Z

287

Interaction of divalent cations with triethylenetetraminehexaacetic acid  

Science Journals Connector (OSTI)

Further studies of the interactions of divalent metal ions with triethylenetetraminehexaacetic acid (TTHA) have revealed that mononuclear, binuclear, and protonated mononuclear complexes are formed in solution with Zn(II), Cd(II), Hg(II) and Pb(II) iions. Equilibrium constants are reported for the various complex species formed, and possible structures for the mononuclear are reported for the various complex species formed, and possible structures for the mononuclear species are suggested. Other reports describing the nature of the complexes formed by this ligand with divalent metal ions are confirmed in that the binuclear complexes are resistant to hydrolysis in alkaline solution, and that the symmetrical binuclear complex is considered the most likely structure.

Austin Yingst; Arthur E. Martell

1971-01-01T23:59:59.000Z

288

Algebraic Process Veri cation J. F. Groote  

E-Print Network [OSTI]

systems. Subsequently, linear process operators, invariants, the cones and foci method, the composition such as operating systems, control systems or even text editors. These programs are constantly obtaining information algebra (ACP) with equational data types which adds required expressive power to describe dis- tributed

Reniers, Michel

289

Geothermal Site Assessment Using the National Geothermal Data...  

Open Energy Info (EERE)

a database user can identify Hawthorne-area thermal anomalies several ways: through spatial interpolation of database geothermometry, temperature gradient calculations, and...

290

Functional and Structural Characterization of Cation/H+ Antiporters  

E-Print Network [OSTI]

and purify CAX proteins for X-ray crystallographic analysis. In this study, I initiated crystallization of vacuolar membrane localized CAX protein from eukaryotes. Membrane proteins continue to be challenging targets for structural biology because...

Manohar, Murli

2012-07-16T23:59:59.000Z

291

Yellow Acid-Cation Complexes in Lake Water  

Science Journals Connector (OSTI)

...predominant N-terminal amino acids in fractions I to IV, the major car-riers of triglyceride in plasma. N-Ter-minal aspartic...Figure 1 B is a similarly run chromatogram of material from Panther Lake, Washington; it also shows region-ally typical results...

JOSEPH SHAPIRO

1958-03-28T23:59:59.000Z

292

Synthesis of Cationic Extended Frameworks for Anion-Based Applications  

E-Print Network [OSTI]

separation, catalysis and water purification. However, manyseparations, water purification, etc. 2-5 However,application in water purification. Indeed, this class of

Fei, Honghan

2012-01-01T23:59:59.000Z

293

Modeling Acid and Cationic Catalysis on the Reactivity of Duocarmycins  

Science Journals Connector (OSTI)

Mauro Freccero * and Remo Gandolfi ... Modica, Emilia; Zanaletti, Riccardo; Freccero, Mauro; Mella, Mariella ... Zanaletti, Riccardo; Freccero, Mauro ...

Mauro Freccero; Remo Gandolfi

2005-08-05T23:59:59.000Z

294

Organic Cation Transporters Are Determinants of Oxaliplatin Cytotoxicity  

Science Journals Connector (OSTI)

...are in the class of plasma membrane transporters...at 37C in a humidified atmosphere with 5 CO2/95 air...by inductively coupled plasma mass spectrometry (MS...acquired on a Varian 300 MHz spectrometer. Fourier...chloride-containing media, such as plasma [[Cl], 103 mmol...

Shuzhong Zhang; Katherine S. Lovejoy; James E. Shima; Leah L. Lagpacan; Yan Shu; Anna Lapuk; Ying Chen; Takafumi Komori; Joe W. Gray; Xin Chen; Stephen J. Lippard; and Kathleen M. Giacomini

2006-09-01T23:59:59.000Z

295

The University of California, Irvine The Department of Edu cation  

E-Print Network [OSTI]

is a useful tool for facilitating targeted instruction. In response to this demand for diagnostic tools Education Unhinging the Instructional Potential of a Language Test: Examining the Validity of a Large

Rose, Michael R.

296

Nanoscale Phase Separation, Cation Ordering, and Surface Oxygen...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

We discovered that the electronic structure and valence state of transition metal ions show significant variations, which have been identified to be attributed to the oxygen...

297

Synthesis of Cationic Extended Frameworks for Anion-Based Applications  

E-Print Network [OSTI]

as: E app = E meas ? E aoc where E meas is the electrodej p was measured and E aoc is the open circuit potential inat which j p was measured. E aoc = –0.6 V (vs. Ag/AgCl) for

Fei, Honghan

2012-01-01T23:59:59.000Z

298

The Impacts of Cation Stoichiometry and Substrate Surface Quality...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

dependent on our ability to controllably synthesize these materials in thin-fi lm form. Structure-property relationships are intimately tied to fi lm and interface...

299

Why Intervals? Why Fuzzy Numbers? Towards a New Justi cation  

E-Print Network [OSTI]

: a practical explanation. One of the main source of information about the physical world is measure- ments; see, e.g., [20]. Measurements are never 100% accurate. As a result, the result x of the measurement is between the measured and the actual values is usually called a measurement error. The manufacturers

Ward, Karen

300

The Multilevel Classi cation Problem and a Monotonicity Hint  

E-Print Network [OSTI]

of mild heart attack symptoms might convey quite a bit of information about the nature of severe heart attack symptoms. For example, if we know the cholesterol level of mild heart attack victims, it is reasonable to guess that the cholesterol level of severe heart attack victims should be higher. Ignoring

Magdon-Ismail, Malik

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Reactivation of 3-Dehydroquinate Synthase by Lanthanide Cations  

Science Journals Connector (OSTI)

Jonathan D. Moore ,†‡ Murray A. Skinner ,§ David R. Swatman ,† Alastair R. Hawkins ,† and Katherine A. Brown *§ ... (c) Lamb, H. K.; Wheeler, K. A.; Hawkins, A. R. In Channeling in Intermediary Metabolism; Agius, I., Sherratt, H. S. A., Eds.; Portland Press:? London, 1997; Chapter 9. ...

Jonathan D. Moore; Murray A. Skinner; David R. Swatman; Alastair R. Hawkins; Katherine A. Brown

1998-07-07T23:59:59.000Z

302

Synthesis of Cationic Extended Frameworks for Anion-Based Applications  

E-Print Network [OSTI]

to existing solar cell technology. xxii Dedication Thisto existing solar cell technology. 11.1 Introduction Since

Fei, Honghan

2012-01-01T23:59:59.000Z

303

Two different cationic positions in Cu-SSZ-13? . | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Design Instruments: Radiological XPS Tags: soil organic matter NOM SOM CO2 sequestration 2H NMR quadrupolar nuclei In situ catalysis radiological biology catalysis solids liquids...

304

Behavior of Soap Films Stabilized by a Cationic Dimeric Surfactant  

Science Journals Connector (OSTI)

A. Espert ,† R. v. Klitzing ,‡ P. Poulin ,† A. Colin ,*† R. Zana ,§ and D. Langevin † ... (47)?Poulin, P.; Bibette, J. Phys. ... Poulin, P.; Bibette, J. ...

A. Espert; R. v. Klitzing; P. Poulin; A. Colin; R. Zana; D. Langevin

1998-07-03T23:59:59.000Z

305

Stable Synthetic Cationic Bacteriochlorins as Selective Antimicrobial Photosensitizers  

Science Journals Connector (OSTI)

...was partly supported by a Massachusetts Technology Transfer Center...was initially motivated by solar-energy studies and supported...Center for Photomedicine, Massachusetts General Hospital for help...Center for Photomedicine, Massachusetts General Hospital, Boston...

Liyi Huang; Ying-Ying Huang; Pawel Mroz; George P. Tegos; Timur Zhiyentayev; Sulbha K. Sharma; Zongshun Lu; Thiagarajan Balasubramanian; Michael Krayer; Christian Ruzié; Eunkyung Yang; Hooi Ling Kee; Christine Kirmaier; James R. Diers; David F. Bocian; Dewey Holten; Jonathan S. Lindsey; Michael R. Hamblin

2010-07-12T23:59:59.000Z

306

The Cation-Interaction Stabilizing Interaction Between a  

E-Print Network [OSTI]

, 1814; Dougherty, et al. Science 1993 261, 1708. #12;The Electrostatic Model sp2 carbon is more Electrostatic Model sp2 carbon is more electronegative than hydrogen ab initio calculated electrostatic protein-coupled receptors for ACh, dopamine, epinephrine ... Cys-loop receptors bin

Stoltz, Brian M.

307

Phylogenetic Relationships within Cation Transporter Families of Arabidopsis1  

E-Print Network [OSTI]

, Michael W. Persans6 , David E. Salt6,7 *, Sun A Kim8 , and Mary Lou Guerinot8 Division of Biology, Cell

Sze, Heven

308

Characterization of an aluminum pillared montmorillonite with cation exchange properties  

Science Journals Connector (OSTI)

The methods of PIGE and XRF were used to determine the elemental composition and the structural formulae of a specially tailored PILC material during the steps of its preparation....137Cs and85Sr with typical ?-r...

D. T. Karamanis; X. A. Aslanoglou…

1999-10-01T23:59:59.000Z

309

Formal Veri cation of Communication Protocols M. A. S. Smith  

E-Print Network [OSTI]

(Belsnes, 1976) which forms the basis of the open and close phase of TCP and ISO-TP4 is formally veri ed

Lynch, Nancy

310

Coverage Dependent Charge Reduction of Cationic Gold Clusters...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

profiling capabilities of in-situ time-of-flight secondary ion mass spectrometry (TOF-SIMS) it is shown that, in addition to the chemical functionality of the monolayer (as...

311

Cation Defects and Conductivity in Transparent Oxides. | EMSL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

In this paper, we identify key parameters that promote conductivity in mixed metal spinel oxides and compare their behavior with that of the free carrier TCO’s....

312

Characterizations of Cation/H+ Antiporters from Arabidopsis and Zebrafish  

E-Print Network [OSTI]

, Pittman et al., 2004). Although deletion of VCX1 does not cause considerable Ca2+ sensitivity, the deletion of both PMC1 and VCX1 genes leads to a greater sensitivity to Ca2+ than the loss of either gene alone, (Pozos et al., 1996) and Vcx1p is required...

Mei, Hui

2010-07-14T23:59:59.000Z

313

Mixed valence of iron in minerals with cation clusters  

Science Journals Connector (OSTI)

The valence and distribution of iron in vivianite, lazulite, babingtonite, rockbridgeite, acmite, aegirine-augite, hedenbergite,...2+ and Fe3+ in neighboring sites through common edges or faces is observed in all...

Georg Amthauer; George R. Rossman

1984-06-01T23:59:59.000Z

314

Cationic Main Group Compounds as Water Compatible Small Anion Receptors  

E-Print Network [OSTI]

.................................................. 31 27. Top: Fluoride capture and release protocol using [34]+. Bottom: Examples of fluorination reactions ................................................................ 33 28. Synthesis of 37, 38, and [39...-withdrawing substituents in triarylboranes constitutes a well-established method for enhancing their Lewis acidity.11 Noteworthy applications for these fluorinated boranes include the activation of transition metal and main group species via anionic ligand abstraction...

Leamer, Lauren Anne

2013-05-06T23:59:59.000Z

315

Isolation of Two Agostic Isomers of an Organometallic Cation...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

doi:10.1002anie.201305032 Authors: der van P Yang RM Bullock Capabilities: NMR and EPR Facility: Virtual Tour Science Theme: Biosystem Dynamics & Design Terrestrial &...

316

Aromatic Cations DOI: 10.1002/anie.201008036  

E-Print Network [OSTI]

. J. Fulara,[+] I. Garkusha, Prof. J. P. Maier Departement Chemie, Universität Basel Klingelbergstrasse 80, 4056 Basel (Switzerland) Fax: (+41)61-267-3855 E-mail: j.p.maier@unibas.ch Homepage: http://www.chemi

Maier, John Paul

317

Specific Cation Effects in Biological Systems: Thermodynamic and Spectroscopic Insights  

E-Print Network [OSTI]

Very specific protein-salt interactions are involved in a multitude of biological phenomena such as protein folding/stability, enzymatic activity, and signal transduction events. In this work, we used two very simple, protein-mimic model biopolymers...

Kherb, Jaibir

2012-02-14T23:59:59.000Z

318

Characterization of Selective Binding of Alkali Cations with...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

understanding of many biological and chemical processes, including protein unfolding and bubble coalescence. A cluster used in a calculation of an acetate molecule interacting...

319

Adsorbed layer structure of cationic surfactants on quartz  

SciTech Connect (OSTI)

Recent atomic force microscopy (AFM) surface images of surfactant adsorbed at solid and solution interfaces have shown apparent micellar aggregates familiar from bulk self-assembly. This contradicts the classical picture of laterally unstructured bilayers within which neutron reflectometry (NR) measurements have previously been analyzed. Applying both techniques to surfactant adsorption on quartz, we show that film thickness and coverage parameters derived from NR results are generally consistent with those from AFM and bulk self-assembly. NR by itself allows us to distinguish between actual bilayer and probable aggregate adsorption, which will be of particular importance when a solution's rheology makes AFM imaging impractical.

Schulz, Jamie C.; Warr, Gregory G.; Butler, Paul D.; Hamilton, W. A.

2001-04-01T23:59:59.000Z

320

Stable Synthetic Cationic Bacteriochlorins as Selective Antimicrobial Photosensitizers  

Science Journals Connector (OSTI)

...rather than intrinsic electronic properties. These...the results provide fundamental information on structure-activity...high-performance ab initio electronic structure program package...rather than intrinsic electronic properties. These...the results provide fundamental information on structure-activity...

Liyi Huang; Ying-Ying Huang; Pawel Mroz; George P. Tegos; Timur Zhiyentayev; Sulbha K. Sharma; Zongshun Lu; Thiagarajan Balasubramanian; Michael Krayer; Christian Ruzié; Eunkyung Yang; Hooi Ling Kee; Christine Kirmaier; James R. Diers; David F. Bocian; Dewey Holten; Jonathan S. Lindsey; Michael R. Hamblin

2010-07-12T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Synthesis of Cationic Extended Frameworks for Anion-Based Applications  

E-Print Network [OSTI]

Tool. Utrecht, The Netherland, 2007. Darab, J. G. ; Smith,Tool. Utrecht, The Netherland, 2007. Cheetham, A. K. ; Rao,Tool. Utrecht, The Netherland, 2007. Darab, J. G. ; Smith,

Fei, Honghan

2012-01-01T23:59:59.000Z

322

Models for Solvation of Zirconocene Cations:? Synthesis, Reactivity, and Computational Studies of Phenylsilyl-Substituted Cationic and Dicationic Zirconocene Compounds  

Science Journals Connector (OSTI)

Jörg Sassmannshausen ,*† Jennifer C. Green ,‡ Franz Stelzer ,† and Judith Baumgartner § ... a?Legend:? (i) PhLi or Me2C6H4MgBr; (ii) LiCp; (iii) CpZrCl3·dme; (iv) LiMe; (v) ZrCl4(thf)2. ... To the compound ClSiMe2C6H4Me thus prepared (29.26 g, 158.9 mmol) in 100 mL of diethyl ether was slowly added a solution of sodium cyclopentadienyl, freshly prepared from NaH (6.35 g, w = 60% in mineral oil, 158.9 mmol) and freshly distilled cyclopentadiene (10.5 g, 158.9 mmol), in 300 mL of thf at 0 °C. ...

Jörg Sassmannshausen; Jennifer C. Green; Franz Stelzer; Judith Baumgartner

2006-04-22T23:59:59.000Z

323

Cationic disorder and Mn{sup 3+}/Mn{sup 4+} charge ordering in the B? and B? sites of Ca{sub 3}Mn{sub 2}NbO{sub 9} perovskite: a comparison with Ca{sub 3}Mn{sub 2}WO{sub 9}  

SciTech Connect (OSTI)

We describe the preparation, crystal structure determination, magnetic and transport properties of two novel Mn-containing perovskites, with a different electronic configuration for Mn atoms located in B site. Ca{sub 3}Mn{sup 3+}{sub 2}WO{sub 9} and Ca{sub 3}Mn{sup 3+/4+}{sub 2}NbO{sub 9} were synthesized by standard ceramic procedures; the crystallographic structure was studied from X-ray powder diffraction (XRPD) and neutron powder diffraction (NPD). Both phases exhibit a monoclinic symmetry (S.G.: P2{sub 1}/n); Ca{sub 3}Mn{sub 2}WO{sub 9} presents a long-range ordering over the B sites, whereas Ca{sub 3}Mn{sub 2}NbO{sub 9} is strongly disordered. By “in-situ” NPD, the temperature evolution of the structure study presents an interesting evolution in the octahedral size (?Mn–O?) for Ca{sub 3}Mn{sub 2}NbO{sub 9}, driven by a charge ordering effect between Mn{sup 3+} and Mn{sup 4+} atoms, related to the anomaly observed in the transport measurements at T?160 K. Both materials present a magnetic order below T{sub C}=30 K and 40 K for W and Nb materials, respectively. The magneto-transport measurements display non-negligible magnetoresistance properties in the paramagnetic regime. - Graphical abstract: Comparison between the octahedron size and the magnetic behaviour for Ca{sub 3}Mn{sub 2}NbO{sub 9} in the temperature region where the charge and magnetic order occur. Display Omitted - Highlights: • Two novel Mn-containing double perovskites were obtained by solid-state reactions. • Both double perovskites are monoclinic (P2{sub 1}/n) determined by XRPD and NPD. • Ca{sub 3}Mn{sub 2}WO{sub 9} contains Mn{sup 3+} while Ca{sub 3}Mn{sub 2}NbO{sub 9} includes mixed-valence cations Mn{sup 3+}/Mn{sup 4+}. • Ca{sub 3}Mn{sub 2}NbO{sub 9} presents a charge-ordering effect between Mn{sup 3+} and Mn{sup 4+} evidenced by NPD. • The magnetic and transport studies evidenced the charge ordering in Ca{sub 3}Mn{sub 2}NbO{sub 9}.

López, C.A., E-mail: calopez@unsl.edu.ar [INTEQUI-Área de Química General e Inorgánica “Dr. G. F. Puelles”, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis (Argentina); Centro Atómico Bariloche, Comisión Nacional de Energía Atómica and Instituto Balseiro, Universidad Nacional de Cuyo, 8400S.C. de Bariloche, Río Negro (Argentina); Saleta, M.E. [Centro Atómico Bariloche, Comisión Nacional de Energía Atómica and Instituto Balseiro, Universidad Nacional de Cuyo, 8400S.C. de Bariloche, Río Negro (Argentina); Pedregosa, J.C. [INTEQUI-Área de Química General e Inorgánica “Dr. G. F. Puelles”, Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis, Chacabuco y Pedernera, 5700 San Luis (Argentina); Sánchez, R.D. [Centro Atómico Bariloche, Comisión Nacional de Energía Atómica and Instituto Balseiro, Universidad Nacional de Cuyo, 8400S.C. de Bariloche, Río Negro (Argentina); Alonso, J.A. [Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049 Madrid (Spain); and others

2014-02-15T23:59:59.000Z

324

Synthesis and structures of new niobium cluster compounds with pyridinium cations: (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}].EtOH (Pyr: pyridine, Et: ethyl) and the cubic modification of (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}  

SciTech Connect (OSTI)

Slow crystallization of (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}] from hot ethanol solution affords triclinic (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}].EtOH. Treatment of [Nb{sub 6}Cl{sub 14}(H{sub 2}O){sub 4}].4H{sub 2}O with pyridine in a methanol solution gives the second title compound, the cubic modification of (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}]. Both structures were determined by single crystal X-ray diffraction, (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}].EtOH: P1-bar , a=9.3475(3), b=9.3957(3), c=10.8600(3) A, {alpha}=82.582(1){sup o}, {beta}=78.608(1){sup o}, and {gamma}=78.085(1){sup o}, Z=1, R{sub 1}(F)/wR{sub 2}(F{sup 2})=0.0254/0.0573, cub.-(PyrH){sub 2}[Nb{sub 6}Cl{sub 18}]: Fd3-bar m, a=19.935(2) A, Z=8, R{sub 1}(F)/wR{sub 2}(F{sup 2})=0.0557/0.1796. The cluster compounds contain isolated, molecular [Nb{sub 6}Cl{sup i}{sub 12}Cl{sup a}{sub 6}]{sup 2-} cluster anions with an octahedron of metal atoms edge bridged by chlorido ligands with additional ones on all the six exo positions. These cluster anions are separated by the pyridinium cations and ethanol solvent molecules, respectively. For the cubic modification of (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}], a structural comparison is given to the known rhombohedral modification using the group-subgroup relations as expressed by a Baernighausen tree. - Graphical abstract: The synthesis and structure of a second cubic modification of (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}] and of the new (PyrH){sub 2}[Nb{sub 6}Cl{sub 18}].EtOH are reported, both of which contain isolated niobium halide cluster anions with an octahedral core of metal atoms.

Flemming, Anke; Hoppe, Alessandra [Institut fuer Chemie, Abteilung Anorganische Chemie/Festkoerperchemie, Universitaet Rostock, Albert-Einstein-Str. 3a, Rostock D-18059 (Germany); Koeckerling, Martin [Institut fuer Chemie, Abteilung Anorganische Chemie/Festkoerperchemie, Universitaet Rostock, Albert-Einstein-Str. 3a, Rostock D-18059 (Germany)], E-mail: Martin.Koeckerling@uni-rostock.de

2008-10-15T23:59:59.000Z

325

Effect of crystal composition and growth rate on sector zoning in solid solutions grown from aqueous solutions  

Science Journals Connector (OSTI)

...959-979. Janeczek, J. and Sachanbinski, M. (1992) Babingtonite, Y-Al-rich titanite, and zoned epidote from the Strzegom...and morphological features of arsenopyrite, concerning its use as a geothermometer. Mineralogy and Petrology , 60 , 231-243...

A. G. Shtukenberg; Yu. O. Punin; O. I. Artamonova

326

Assigning Structures to Gas-Phase Peptide Cations and Cation-Radicals. An Infrared Multiphoton Dissociation, Ion Mobility, Electron Transfer, and Computational Study of a Histidine Peptide Ion  

Science Journals Connector (OSTI)

Infrared multiphoton dissociation (IRMPD) spectroscopy, using a free-electron laser, and ion mobility measurements, using both drift-cell and traveling-wave instruments, were used to investigate the structure of gas-phase peptide (AAHAL + 2H)2+ ions ...

Christopher L. Moss; Julia Chamot-Rooke; Edith Nicol; Jeffery Brown; Iain Campuzano; Keith Richardson; Jonathan P. Williams; Matthew F. Bush; Benjamin Bythell; Bela Paizs; Frantisek Turecek

2012-02-27T23:59:59.000Z

327

Cation-cation contact pairing in water: Guanidinium Orion Shih, Alice H. England, Gregory C. Dallinger, Jacob W. Smith, Kaitlin C. Duffey, Ronald C. Cohen, David  

E-Print Network [OSTI]

. Dallinger, Jacob W. Smith, Kaitlin C. Duffey, Ronald C. Cohen, David Prendergast, and Richard J. Saykally W. Smith,1 Kaitlin C. Duffey,1 Ronald C. Cohen,1 David Prendergast,3,c) and Richard J. Saykally1,2,c

Cohen, Ronald C.

328

Cationic Ruthenium Hydrido?Carbonyls Derived from Metallocene-Based Pincers: Unusual Rearrangements and H2 Evolution with Formation of Cationic Ruthenium Metallocenylidenes  

Science Journals Connector (OSTI)

Calculations were performed using the PRIRODA program(20) and PBE functional(21) with 3z (includes functions for elements up to Xe) and sbk (includes functions for elements heavier than Xe up to radon) basis sets. ... This work was partly supported by the Russian Academy of Sciences, OX-01 Program of the Branch of Chemistry and Materials Sciences, the Russian Foundation for Basic Research (Project Nos. ... 10-03-00505, 08-03-01020), and the International Science and Technology Center (ISTC, Grant G 1361). ...

Avthandil A. Koridze; Alexander V. Polezhaev; Sergey V. Safronov; Alexey M. Sheloumov; Fedor M. Dolgushin; Mariam G. Ezernitskaya; Boris V. Lokshin; Pavel V. Petrovskii; Alexander S. Peregudov

2010-09-09T23:59:59.000Z

329

Z .Chemical Geology 158 1999 189202 Bacterial effects on the mobilization of cations from a weathered  

E-Print Network [OSTI]

. The mobility of the Pb associated with these iron oxides was less than that of other heavy metals that were .matrix Wang et al., 1995 . Irreversible sorption or precipitation of heavy metals onto subsurface min toxicity of the metal remains. Metal release is likel

Dorn, Ron

330

Quantitative Structure Activity Relationship for Inhibition of Human Organic Cation/Carnitine Transporter  

Science Journals Connector (OSTI)

gratefully acknowledges Dr. Matthew D. Krasowski for his assistance in creating the SCUT 2008 database supplemented with metabolites and drugs of abuse. ... This material is available free of charge via the Internet at http://pubs.acs.org. ...

Lei Diao; Sean Ekins; James E. Polli

2010-09-10T23:59:59.000Z

331

Evaluation of the field-scale cation exchange capacity of Hanford sediments  

E-Print Network [OSTI]

Richland, WA: CH2M Hill Hanford Group, Inc. Lichtner, P.C. &A.R. 2003. Estimation of Hanford SX tank waste compositionsS. 2003. Cesium migration in Hanford sediments: a multisite

Steefel, C.I.

2003-01-01T23:59:59.000Z

332

E-Print Network 3.0 - aqueous solution cation Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

au no 4, Tome 40, Avril 1979,page C3-438 THE EFFECT OF AMPHIPHILIC LIQUID CRYSTALLINE SOLVENTS Summary: media. The organization of amphiphilic molecules in aqueous solution...

333

Antisense peptide nucleic acid-functionalized cationic nanocomplex for in vivo mRNA detection  

Science Journals Connector (OSTI)

...Department of Chemistry and Chemical Engineering, Texas...that make them an ideal platform for development of antisense...20], is an ideal platform for the development...Materials All solvents and chemicals were purchased from...were purchased from EMD Chemicals, Inc. The amphiphilic...

2013-01-01T23:59:59.000Z

334

E-Print Network 3.0 - antimonate cation exchanger Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

resembled that of arsenate with an initial linear ac- cumulation Source: Hammock, Bruce D. - Department of Entomology, University of California, Davis Collection:...

335

Depassivation of Aged Fe0 by Divalent Cations: Correlation between Contaminant Degradation and Surface Complexation Constants  

Science Journals Connector (OSTI)

behavior of such particles and, consequently, affect their applications in water and wastewater treatment and in air pollution control. ... Shell-modified NZVI particles were resistant to rapid aerial oxidn. ...

Tongxu Liu; Xiaomin Li; T. David Waite

2014-11-10T23:59:59.000Z

336

ELECTRICAL CONDUCTIVITY SPECTRA OF SMECTITES AS INFLUENCED BY SATURATING CATION AND HUMIDITY  

Science Journals Connector (OSTI)

...frequencies 500 MHz were not included...equilibrated with an atmosphere controlled at the...inductively coupled plasma-atomic emission...data above 500 MHz were not fitted because...of smectites 413 atmosphere desiccators to the...inductively coupled plasma-atomic emission...

Sally D. Logsdon; David A. Laird

337

Mechanistic Study of the Photodynamic Inactivation of Candida albicans by a Cationic Porphyrin  

Science Journals Connector (OSTI)

...face (E, inset). Fluence rate, 30 mW cm2. TABLE 1. Results...muM TriP[4]. The fluence rate was 30 mW cm2. REFERENCES 1...Handbook of chemistry and physics. CRC Press, Inc., Boca Raton...PDI-induced damage once TriP[4] passes the plasma membrane. Increasing...

S. A. G. Lambrechts; M. C. G. Aalders; J. Van Marle

2005-05-01T23:59:59.000Z

338

Characterization of plant cation/h+ antiporters and how they can impact nutrition  

E-Print Network [OSTI]

. In mice feeding regimes (n = 120), I measured 45Ca-incorporation into bones, and determined that mice required twice the serving size of control carrots to obtain the calcium found in sCAX1-carrots. Together, these two studies demonstrate how the potential...

Morris, James Larry

2009-05-15T23:59:59.000Z

339

A beta 3 integrin mutation abolishes ligand binding and alters divalent cation-dependent conformation  

Science Journals Connector (OSTI)

...Dean, L. Kincla, H. R. Sykes, A. R. Lehmann, I. A. Wise, Exp. Cell Res. 183, 473 (1989)]. 15. S. J. Baker...JOSEPH C. LOFTUS,* TIMOTHY E. O'TOOLE, EDWARD F. PLOW, ALISON GLASs, ANDREW L. FRELINGER III, MARK H. GINSBERG The ligand-binding...

JC Loftus; TE O'Toole; EF Plow; A Glass; AL Frelinger 3rd; MH Ginsberg

1990-08-24T23:59:59.000Z

340

On the classi cation of nuclear C -algebras Marius Dadarlat S ren Eilers  

E-Print Network [OSTI]

, 1991. [24] G.G. Kasparov, Hilbert C #3; -modules: Theorems of Stinespring and Voiculescu, J. Operator

Eilers, Søren

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Cation segregation and the O-H stretching vibration of the olivenite-adamite series  

Science Journals Connector (OSTI)

The behaviour of the O-H stretching infrared spectra of the synthetic olivenite-adamite series described by Brathwaite (1983) is...?1 correspond to OH groups bonded to Zn3 and CuZn2 respectively. The third band c...

J. E. Chisholm

1985-07-01T23:59:59.000Z

342

E-Print Network 3.0 - acidic cation-exchange resin Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Medicine 7 2114 J. Phys. Chem. 1989, 93, 2114-2180 FKN mechanism of the BZ reaction (expanded "Oregonator") Summary: -Zhabotinsky (BZ) reaction in which the ferroin catalyst...

343

Classi cation and Characterization of Objects from the GALEX and SDSS surveys  

E-Print Network [OSTI]

internal re- lease, matched to the SDSS catalogs in the overlapping regions, to classify objects@ipac.caltech.edu) 9 Laboratory for Astronomy and Solar Physics, NASA Goddard Space Flight Center, Greenbelt, MD 20771

Bianchi, Luciana

344

Towards automatic cell identi cation in DIC microscopy , C.A. Glasbey2y  

E-Print Network [OSTI]

1998. Journal of Microscopy, 192, 186-193. #12;a b c Figure 1: DIC microscope images: a Chlorella algal

Stone, J. V.

345

Specular neutron reflection at the mica/water interface - irreversible adsorption of a cationic dichain surfactant  

Science Journals Connector (OSTI)

A novel experimental method to exploit specular neutron reflection from the surface of mica at the solid/liquid interface is reported. The approach involves supporting a thin mica crystal on a silicon substrate. The applicability of this technique for mica is demonstrated by adsorption of a dichain surfactant to form a complete unhydrated bilayer at this interface and its partial removal by washing and ion exchange.

Browning, K.L.

2014-09-20T23:59:59.000Z

346

Infrared Spectroscopy of Cationized Arginine in the Gas Phase: Direct Evidence for the Transition from  

E-Print Network [OSTI]

, Richard J. Saykally, and Evan R. Williams* Contribution from the Department of Chemistry, Uni from Nonzwitterionic to Zwitterionic Structure Matthew F. Bush, Jeremy T. O'Brien, James S. Prell. J. Mass Spectrom. 2001, 7, 303-311. (5) Strittmatter, E. F.; Lemoff, A. S.; Williams, E. R. J. Phys.

Cohen, Ronald C.

347

Mobility of singly-charged lanthanide cations in rare gases: Theoretical assessment of the state specificity  

SciTech Connect (OSTI)

High quality, ab initio calculations are reported for the potential energy curves governing the interactions of four singly-charged lanthanide ions (Yb{sup +}, Eu{sup +}, Lu{sup +}, and Gd{sup +}) with the rare gases (RG = He–Xe). Scalar-relativistic coupled cluster calculations are used for the first three S-state ions, but for Gd{sup +}({sup 10}D°) it is necessary to take the interaction anisotropy into account with the help of the multi-reference technique. The potential energy curves are used to determine the ion mobility and other transport properties describing the motion of the ions through the dilute RG, both as functions of the temperature, T, in the low-field limit, and at fixed T as functions of the ratio of the electrostatic field strength to the gas number density, E/N. The calculated mobilities are in good agreement with the very limited experimental data that have become available recently. The calculations show a pronounced dependence of the transport properties on the electronic configuration of the ion, as well as a significant effect of the spin-orbit coupling on the transport properties of the Gd{sup +} ion, and predict that state-specific mobilities could be detectable in Gd{sup +}–RG experiments.

Buchachenko, Alexei A., E-mail: alexei@classic.chem.msu.su [Institute of Problems of Chemical Physics RAS, Chernogolovka, Moscow District 142432, Russia and Department of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119991 (Russian Federation); Viehland, Larry A., E-mail: viehland@chatham.edu [Science Department, Chatham University, Pittsburgh, Pennsylvania 15232 (United States)

2014-03-21T23:59:59.000Z

348

Quantum oscillations in the linear chain of coupled orbits: the organic metal with two cation layers  

E-Print Network [OSTI]

Ci`encia de Materials de Barcelona, CSIC, Campus de la UAB, 08193, Bel- laterra, Spain. PACS 71.18.+y- lent anion) exhibit very rich phase diagrams with ground states ranging from antiferromag- netic enabled by the 2D character of the FS. However, easy to handle analytic tools necessary to quantitatively

Boyer, Edmond

349

Probing water properties and cationic exchange in calcium-silicate-hydrate : an atomistic modeling study  

E-Print Network [OSTI]

Two problems related to the assessment of the performance of cementitious materials in the nuclear fuel cycle are investigated by means of atomistic simulations. The first is the structural and dynamic nature of water ...

Youssef, Mostafa Youssef Mahmoud

2010-01-01T23:59:59.000Z

350

AMENDMENT OF SOLICITATION/MODIFICATION OF CONTRACT 2. AMENDMEMTJMOD1F1CATION NO.  

E-Print Network [OSTI]

: The Department of Energy (DOE), Office of Science (SC), Pacific Northwest Site Office (PNSO) is modifying BY CODE U.S. Department of Energy Pacific Northwest Site Office Post Office Box 350 Richland.WA 99352 3 CHANGES (such as changes in paying office, appropriation date, etc.) SET FORTH IN ITEM 14, PURSUANT

351

Low dimensionality spectral sensing for low cost material discrimination and identi cation  

E-Print Network [OSTI]

.6 Light Emitting Diodes as Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . 32 3.7 Other

Bove Jr., V. Michael

352

Isotopic mass-dependence of metal cation diffusion coefficients in liquid water  

SciTech Connect (OSTI)

Isotope distributions in natural systems can be highly sensitive to the mass (m) dependence of solute diffusion coefficients (D) in liquid water. Isotope geochemistry studies routinely have assumed that this mass dependence either is negligible (as predicted by hydrodynamic theories) or follows a kinetic-theory-like inverse square root relationship (D {proportional_to} m{sup -0.5}). However, our recent experimental results and molecular dynamics (MD) simulations showed that the mass dependence of D is intermediate between hydrodynamic and kinetic theory predictions (D {proportional_to} m{sup -{beta}} with 0 {<=} {beta} < 0.2 for Li{sup +}, Cl{sup -}, Mg{sup 2+}, and the noble gases). In this paper, we present new MD simulations and experimental results for Na{sup +}, K{sup +}, Cs{sup +}, and Ca{sup 2+} that confirm the generality of the inverse power-law relation D {proportional_to} m{sup -{beta}}. Our new findings allow us to develop a general description of the influence of solute valence and radius on the mass dependence of D for monatomic solutes in liquid water. This mass dependence decreases with solute radius and with the magnitude of solute valence. Molecular-scale analysis of our MD simulation results reveals that these trends derive from the exponent {beta} being smallest for those solutes whose motions are most strongly coupled to solvent hydrodynamic modes.

Bourg, I.C.; Richter, F.M.; Christensen, J.N.; Sposito, G.

2009-01-11T23:59:59.000Z

353

Cation Size Mismatch and Charge Interactions Drive Dopant Segregation at the Surfaces of Manganite Perovskites  

E-Print Network [OSTI]

and stability of solid oxide fuel cell (SOFC) cathodes. A unified theory that explains the physical origins applications, including solid oxide fuel cells,1-9 oxygen permeation membranes,10,11 batteries,12 on perovskite oxide surfaces impacts tremendously the reactivity and stability of solid oxide fuel cell (SOFC

Yildiz, Bilge

354

Special Effect of -Cyclodextrin on the Aggregation Behavior of Mixed Cationic/Anionic Surfactant Systems  

E-Print Network [OSTI]

and a following micelle-to-vesicle transition, which in turn greatly influences the viscosity and absorbance can be employed to load substances into the inner pool of the vesicles or to reconstitute membrane, metal ions, or organic additives,10 they are rather system-dependent and do not follow a general rule

Huang, Jianbin

355

Membrane resistance: The effect of salinity gradients over a cation exchange membrane  

Science Journals Connector (OSTI)

Abstract Ion exchange membranes (IEMs) are used for selective transport of ions between two solutions. These solutions are often different in concentration or composition. The membrane resistance (RM) is an important parameter affecting power consumption or power production in electrodialytic processes. In contrast to real applications, often RM is determined while using a standard 0.5 M NaCl external solution. It is known that RM increases with decreasing concentration. However, the detailed effect of a salinity gradient present over an IEM on RM was not known, and is studied here using alternating and direct current. NaCl solution concentrations varied from 0.01 to 1.1 M. The results show that RM is mainly determined by the lowest external concentration. RM can be considered as two resistors in series i.e. a gel phase (concentration independent) and an ionic solution phase (concentration dependent). The membrane conductivity is limited by the conductivity of the ionic solution when the external concentration, cext<0.3 M. The membrane conductivity is limited by the conductivity of the gel phase when cext?0.3 M, then differences of RM are small. A good approximation of experimentally determined RM can be obtained. The internal ion concentration profile is a key factor in modeling RM.

A.H. Galama; D.A. Vermaas; J. Veerman; M. Saakes; H.H.M. Rijnaarts; J.W. Post; K. Nijmeijer

2014-01-01T23:59:59.000Z

356

Antisense peptide nucleic acid-functionalized cationic nanocomplex for in vivo mRNA detection  

Science Journals Connector (OSTI)

...University, , St Louis, MO 63130, USA 2 Department of Medicine, Washington University, , St Louis, MO 63110, USA 3 Department...National Institutes of Health as a Programme of Excellence in Nanotechnology (HHSN268201000046C). The Welch Foundation is gratefully...

2013-01-01T23:59:59.000Z

357

ELECTRICAL CONDUCTIVITY SPECTRA OF SMECTITES AS INFLUENCED BY SATURATING CATION AND HUMIDITY  

Science Journals Connector (OSTI)

...between 300 kHz and 3 GHz...frequencies 500 MHz were not included...equilibrated with an atmosphere controlled at...inductively coupled plasma-atomic emission...slope change (MHz) 12.2 b 8...slope change (MHz) 3.71 c 11...inductively coupled plasma-atomic emission...measurements from 100 kHz to 1 GHz. Transactions...

Sally D. Logsdon; David A. Laird

358

Speci cation and Analysis of Real-Time Systems in Statecharts  

E-Print Network [OSTI]

,hshongg@salmosa.kaist.ac.kr Abstract Increased use of software in controlling safety-critical systems pro- duced an urgent need;1 Introduction Software controlling safety-critical real-time systems has already become a part of our society on software to control the amount of radiation to deliver for cancer therapy and to monitor various vital

359

Combined Effects of Functional Cation and Anion on the Reversible Dehydrogenation of LiBH4  

Science Journals Connector (OSTI)

Catalyst doping has been widely employed as an effective method for improving the H-exchange kinetics of complex hydrides. However, a viable hydrogen storage material requires favorable properties on both kinetic and thermodynamic aspects to allow ...

Zhan-Zhao Fang; Xiang-Dong Kang; Zhu-Xian Yang; Gavin S. Walker; Ping Wang

2011-05-24T23:59:59.000Z

360

Synthetic receptors as models for alkali metal cation-? binding sites in proteins  

Science Journals Connector (OSTI)

...Chemistry, University of Missouri, 601 South College Avenue...calculations (10–12), gas phase studies (13–15...vacuo to afford a yellow oil. The oil was purified by flash column...product as a colorless oil. After 24 h under high...

Stephen L. De Wall; Eric S. Meadows; Leonard J. Barbour; George W. Gokel

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

ANION AND CATION CHANNELS IN THE THYLAKOID MEMBRANE 1.1. Pottosin & G. Schonknecht  

E-Print Network [OSTI]

. The open probability of a particular ion channel was calculated as the relative time spent in the open.5 in the bath, in the patch pipette 100 rnM KCl was substituted by 15 rnM KCl). Under these conditions the net current through a permselective ion channel at zero voltage has an amplitude different from zero. The sign

Schönknecht, Gerald

362

Allene and pentatetraene cations as models for intramolecular charge transfer: Vibronic coupling Hamiltonian and conical intersections  

E-Print Network [OSTI]

The vibrational energy level structure of various ionized and neutral molecules has been studied by valence photo of the ab initio adiabatic potential energy surfaces along all nuclear degrees of freedom, including points and use the more involved third-order algebraic diagrammatic construction method to include intersections

Markmann, Andreas

363

E-Print Network 3.0 - alkaline-earth metal cations Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

K. (2002): A novel group of alkaline earth metal amides: synthesis... ): Not just heavy "Grignards": Recent advances in the organometallic chemistry of the alkaline earth...

364

Photoinduced Electron Transfer Reactions of Highly Conjugated Thiophenes for Initiation of Cationic Polymerization and Conjugated  

E-Print Network [OSTI]

of Polymer Science and Technology, Department of Chemistry, The Center for Solar Energy Research, and microlithography due to several advantages.4 Onium salts such as iodonium,5 sulfonium,6 phosphonium,7 ammonium,8

Turro, Nicholas J.

365

AMENDMENT OF SOLlClTATlONlMODlFlCATION OF CONTRACT 1 I . CONTR...  

National Nuclear Security Administration (NNSA)

M 251.1-1A Directives System Manual O 341.1 Federal Employee Health Services (PXSO Contracting Officer Approval Memo, February 9, 2004) O 350.1 Contractor Human Resource...

366

E-Print Network 3.0 - advanced nano-composite cation-exchanger...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Journal of Modern Physics B Vol. 24, Nos. 15 & 16 (2010) 23572362 Summary: -TIC-TICDLC GRADIENT NANO-COMPOSITE FILM ON NITI ALLOY FUQIU MA, XILIANG LIU, DONG LIU and...

367

Tracking transmitter-gated P2X cation channel activation in vitro and in vivo  

E-Print Network [OSTI]

channels that show calcium fluxes. We genetically engineered rat P2X receptors to carry calcium sensors, comprising the Cys-loop, glutamate and P2X receptor families1, collectively underlie excitatory fast synaptic

Newman, Eric A.

368

From Stimuli-Responsive Polymorphic Organic Dye Crystals to Photoluminescent Cationic Open-Framework Metal Phosphate  

Science Journals Connector (OSTI)

Four photoluminescent dye crystals, TPB-n (n = 1–3) and TPCH, have been synthesized in isolation from carbon–carbon coupling of 4,4?-trimethylene-dipyridine (tmdp) in the absence of organic solvent and catalyst via in situ one-pot metal/ligand oxidative-...

Yu-Chuan Chang; Sue-Lein Wang

2012-05-03T23:59:59.000Z

369

A Breakthrough toward Long Wavelength Cationic Photopolymerization: Initiating Systems Based on Violanthrone Derivatives and Silyl Radicals  

Science Journals Connector (OSTI)

The use of very soft irradiations (household fluorescent and LED bulbs, sunlight and xenon lamp as visible light sources) is described. ... Using a fluorescence bulb irradiation and the V-78 (or V-79)/TTMSS/Ph2I+ three-component PIS under air, quite good EPOX polymerization profiles under air are observed (Figure 3A). ... Fluorescence quenching rate const. of >60 typical electron donor-acceptor systems, such as fluorescing compds. of 3-pyrenecarboxylic acid (electron acceptor), and naphthalene (electron donor), and quenching compds. of tetracyanoethylene (electron acceptor), and N,N,N',N'-tetramethyl-p-phenylenediamine (electron donor), were measured in MeCN, and are correlated with the free enthalpy change, ?G23, involved in the actual electron transfer process 1F* ... Q ? F.-+. .... Q± (F* is an excited mol., and Q is a non-excited mol.) in the encounter complex, and varying between +5 and -60 kcal/mole. ...

Mohamad-Ali Tehfe; Jacques Lalevée; Fabrice Morlet-Savary; Bernadette Graff; Jean-Pierre Fouassier

2011-10-05T23:59:59.000Z

370

Building Responsive Systems from Physically-correct Speci cations Azer Bestavros  

E-Print Network [OSTI]

to foretell that an implementation will not violate a set of speci ed reliability and timeliness requirements include command and control sys- tems, nuclear reactors, process-control plants, robotics, avionics, safety analysis, programming languages, development tools, scheduling, and operating systems. In addition

371

Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide  

Science Journals Connector (OSTI)

...which combine a battery-like redox electrode...conductors [e.g., graphene oxide or TiO 2...materials for Li ion batteries? Computational studies...by activation of graphene . Science 332 , 1537...high-performance and flexible graphene-based electrochemical...Vehicle Technologies, Batteries for Advanced Transportation...

Maria R. Lukatskaya; Olha Mashtalir; Chang E. Ren; Yohan Dall’Agnese; Patrick Rozier; Pierre Louis Taberna; Michael Naguib; Patrice Simon; Michel W. Barsoum; Yury Gogotsi

2013-09-27T23:59:59.000Z

372

E-Print Network 3.0 - aromatic hydrocarbon cations Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

... Source: Canberra, University of - Institute for Applied Ecology Collection: Environmental Sciences and Ecology 6 Dr. Shu Tao, ProfessorEnvironmental Geography and...

373

Does ionophore A23187 mediate Na transport in the absence of divalent cations?  

Science Journals Connector (OSTI)

... L. & Beaugé, L. in Transport Across Biological Membranes (eds Giebisch, G., Tosteson, D. C. & Ussing, H. H.) vol. 2 (Springer, in ...

PETER FLATMAN; VIRGILIO L. LEW

1977-12-01T23:59:59.000Z

374

Material properties of cation exchange membranes for chloralkali electrolysis, water electrolysis and fuel cells  

Science Journals Connector (OSTI)

Owing to the development of perfluorinated ion-exchange membranes, the application of the membranes in electrochemical cells has advanced greatly, especially in chloralkali electrolysis. Material properties of pe...

T. Asawa

1989-07-01T23:59:59.000Z

375

Characterization of selective binding of alkali cations with carboxylate by x-ray absorption spectroscopy  

E-Print Network [OSTI]

spectra measured for aqueous formate and acetate solutions containing lithium, sodium, and potassium simulations and other experi- ments. The carbon K-edge spectra of the acetate carbonyl feature centered near with the carboxylate groups of the model carboxylate anions formate and acetate, using liquid microjet technology

Cohen, Ronald C.

376

Mechanistic and Reactivity Studies of Cationic Cyclizations Catalyzed by Supramolecular Encapsulation  

E-Print Network [OSTI]

lithium wire ( 45.2 mmol), 2.3 mL 2-bromo-2- butene (22.6 mmol), and 1.0 g ethyl acetate-lithium wire (27.7 mmol), 1.87 g (E)-2-bromo-2-butene (13.9 mmol), and 0.680 mL ethyl acetate (

Hastings, Courtney James

2010-01-01T23:59:59.000Z

377

Z Group Ketone Chain Transfer Agents for RAFT Polymer Nanoparticle Modi cation via Hydrazone Conjugation  

E-Print Network [OSTI]

derivatives demonstrate a range of potential theranostic/biotechnological applications for this conveniently

Bong, Dennis

378

Synthesis and Characterization of Anionic and Cationic Poly(ferrocenylsilane) Polyelectrolytes  

Science Journals Connector (OSTI)

5 Thin films of such block copolymers, e.g., poly(ferrocenyldimethylsilane-block-isoprene), can serve as self-assembling templates, enabling nanometer-sized patterns to be transferred directly into silicon or silicon nitride substrates by reactive ion etching. ... Transition temperatures were calibrated using cyclohexane, gallium, and indium standards. ... (29)?The solubility of 5 in water decreases above pH 7, while 8 becomes less soluble at pH < 6. ...

Mark A. Hempenius; Fabiane F. Brito; G. Julius Vancso

2003-07-30T23:59:59.000Z

379

Accurate and Reliable Cancer Classi cation Based on Pathway-Markers and Subnetwork-Markers  

E-Print Network [OSTI]

&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Byung-Jun Yoon Committee Members, Edward R. Dougherty Ulisses Braga Neto Robert Chapkin Shuguang (Robert) Cui Head of Department...&M University in partial ful llment of the requirements for the degree of MASTER OF SCIENCE Approved by: Chair of Committee, Byung-Jun Yoon Committee Members, Edward R. Dougherty Ulisses Braga Neto Robert Chapkin Shuguang (Robert) Cui Head of Department...

Su, Junjie

2012-02-14T23:59:59.000Z

380

Synthesis, Characterization and Anion Complexation of Cationic Main Group Lewis Acids  

E-Print Network [OSTI]

the boron and phosphorus Lewis acidic sites of the receptor via chelation (lp(N)s*(P-C)). Sulfonium borane [o(Mes2B)C6H4(SMe2)] can detect up to 50 ppb of cyanide in water at pH 7 due to favorable Coulombic effects. The sulfonium moiety interacts...

Kim, Youngmin

2011-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Neutral and Cationic Main Group Lewis Acids - Synthesis, Anion Complexation and Redox Properties  

E-Print Network [OSTI]

.4 Synthesis of phosphorus containing radicals ..................................... 9 1.4.1 Introduction ............................................................................... 9 1.4.2 Objectives....1.1 Phosphorus ylids ..................................................................... 85 4.1.2 Imminium and Imidizolium phosphonium species ................. 87 4.1.3 ?-phosphoryl radicals .............................................................. 88...

Dorsey, Christopher L.

2010-07-14T23:59:59.000Z

382

Journal of Contemporary Water researCh & eduCationUCOWR Geomorphology and Restoration Ecology  

E-Print Network [OSTI]

Ecology David R. Montgomery Quaternary Research Center and Department of Earth & Space Sciences University of restoration ecology? I have struggled with this question over the past of the potential for geomorphology to contribute to restoration ecology requires conceptual and educational shifts

Montgomery, David R.

383

Electrochemical study of uranium cations in LiCl-KCl melt using a rotating disk electrode  

SciTech Connect (OSTI)

A rotating disk electrode (RDE) measurement technique was employed to investigate the electrochemical REDOX reactions of actinide (An) and lanthanide (Ln) ions in LiCl-KCl molten salt. By using RDE, it is possible to access more exact values of the diffusion coefficient, Tafel slope, and exchange current density. In this work, we constructed RDE setup and electrodes for RDE measurements in high temperature molten salt and measured the electrochemical parameters of the An and Ln ions. The RDE setup is composed of a Pine model MSRX rotator equipped with a rod type of W electrode. The active electrode area was confined to the planar part of the W rod by making meniscus at the LiCl-KCl melt surface.

Bae, Sang-Eun; Kim, Dae-Hyun; Kim, Jong-Yoon; Park, Tae-Hong; Cho, Young Hwan; Yeon, Jei-Won; Song, Kyuseok [Nuclear Chemistry Research Division, Korea Atomic Energy Research Institute,989-111 Daedeok-daero, Yuseong-gu, Daejeon, 305-353 (Korea, Republic of)

2013-07-01T23:59:59.000Z

384

Improving the Performance of Lithium Manganese Phosphate Through Divalent Cation Substitution  

E-Print Network [OSTI]

2003). J. Barker, M . Y . Saidi and T. E. Kelley, US PatentTechnology, Inc. ). M . Y . Saidi and H . Huang, US Patent

Chen, Guoying

2010-01-01T23:59:59.000Z

385

Paramagnetic Suseptibilities and Electronic Structure of Aqueous Cations of Elements 92 to 95  

E-Print Network [OSTI]

plutonium, and americium solutions was dissolution of aplu- The neptunium and americium solutions were assayed byThe neptunium and americium were available for this study

Howland, Jerome J.; Calvin, Melvin

2008-01-01T23:59:59.000Z

386

Linking bacteria-metal interactions to mineral attachment: A role for outer sphere complexation of cations?  

E-Print Network [OSTI]

, we tested whether alteration of bacterial cell wall electrical field via outer sphere complexation mineral phases, protection from predation via biofilm formation, and communalism among various microbial in groundwater systems and the role of bacteria in weathering and diagenetic proc- esses we must first quantify

Roberts, Jennifer A.

387

Stochastic analysis of transport and multicomponent competitive monovalent cation exchange in aquifers  

Science Journals Connector (OSTI)

...Application of geostatistics in processing the results of soil and agrochemical studies: Eurasian Soil Science, v. 34 p. 1219-1228. Matschonat, G., and Vogt, R., 1996, Equilibrium solution composition and exchange properties of disturbed and undisturbed soil...

388

E-Print Network 3.0 - actinide metal cations Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fluorescence image... , cwalsby@sfu.ca Anticancer Metallodrugs. A number of transition-metal containing compounds have shown high Source: Simon Fraser University, School of...

389

Inorganic Cation Transport and Energy Transduction in Enterococcus hirae and Other Streptococci  

Science Journals Connector (OSTI)

...Chemiosmotic energy coupling. Electrogenic...primary event not only for energy metabolism but also for...exposed to the outside world through a cell surface...variety of ancillary energy conversion mechanisms...does not make energy reserve polymers. Finally...

Yoshimi Kakinuma

1998-12-01T23:59:59.000Z

390

Delivery of cationic polymer-siRNA nanoparticles for gene therapies in neural regeneration  

SciTech Connect (OSTI)

Highlights: Black-Right-Pointing-Pointer Nogo receptor can inhibit growth of injured axons, thus affecting neural regeneration. Black-Right-Pointing-Pointer The delivery of siRNA is crucial to inhibit NgR expression in NSCs. Black-Right-Pointing-Pointer Non-viral vector PEG-PEI condensed siRNA targeting NgR into nanoscale particles. Black-Right-Pointing-Pointer PEG-PEI/siRNA at N/P = 15 displayed high transfection efficiency and low cytotoxicity. Black-Right-Pointing-Pointer PEG-PEI has great potential in carrying siRNA to diminish the gene expression in NSCs. -- Abstract: The therapeutic applications of neural stem cells (NSCs) have potential to promote recovery in many obstinate diseases in central nervous system. Regulation of certain gene expressions using siRNA may have significant influence on the fate of NSC. To achieve the optimum gene silencing effect of siRNA, non-viral vector polyethylene glycol-polyethyleneimine (PEG-PEI) was investigated in the delivery of siRNA to NSCs. The characteristics of PEG-PEI/siRNA polyplexes were detected by scanning electron microscopy (SEM). The effects of nanoparticles on cell viability were measured via CCK-8 assay. In addition, the transfection efficiency was evaluated by fluorescence microscope and flow cytometry, and real-time PCR and Western Blot were employed to detect the gene inhibition effect of siRNA delivered by PEG-PEI. The SEM micrographs showed that PEG-PEI could condense siRNA to form diffuse and spherical nanoparticles. The cytotoxicity of PEG-PEI/siRNA nanocomplexes (N/P = 15) was significantly lower when compared with that of Lipofectamine 2000/siRNA (P < 0.05). Moreover, the highest transfection efficiency of PEG-PEI/siRNA nanoparticles was obtained at an N/P ratio of 15, which was better than that achieved in the transfection using Lipofectamine 2000 (P < 0.05). Finally, the gene knockdown effect of PEG-PEI/siRNA nanoparticles was verified at the levels of mRNA and protein. These results suggest that PEG-PEI may potentially be used as a siRNA delivery vector for neural regeneration therapy.

Liang, Yanran [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)] [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China); Liu, Zhonglin, E-mail: zhonglinliu@126.com [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)] [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China); Shuai, Xintao; Wang, Weiwei [School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China (China)] [School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China (China); Liu, Jun [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)] [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China); Bi, Wei [Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Road, Guangzhou 510630, People's Republic of China (China)] [Department of Neurology, The First Affiliated Hospital of Jinan University, No. 613, West Huangpu Road, Guangzhou 510630, People's Republic of China (China); Wang, Chuanming; Jing, Xiuna; Liu, Yunyun [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)] [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China); Tao, Enxiang, E-mail: taoenxiang@yahoo.com.cn [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)] [Department of Neurology, Sun Yat-Sen Memorial Hospital of Sun Yat-Sen University, No. 107, West Yanjiang Road, Guangzhou 510120, People's Republic of China (China)

2012-05-18T23:59:59.000Z

391

E-Print Network 3.0 - alkaline cations complexation Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

treatment in aerobic ponds and wetlands. RAPS ... Source: Kirby, Carl S. - Department of Geology, Bucknell University Collection: Geosciences 19 Simulation of reactive transport...

392

Chemical, multi-isotopic (Li-B-Sr-U-H-O) and thermal characterization of Triassic formation waters from the Paris Basin  

E-Print Network [OSTI]

of around 45 to 50°C. The study of uranium activity ratios for these Triassic formation waters allows us, uranium isotopes, oxygen isotopes, hydrogen isotopes, geothermometry, Trias, Paris Basin 1 hal-00563924,version1-7Feb2011 Author manuscript, published in "Chemical Geology 283, 3-4 (2011) 226-241" DOI : 10

Boyer, Edmond

393

Proceedings World Geothermal Congress 2005 Antalya, Turkey, 24-29 April 2005  

E-Print Network [OSTI]

Proceedings World Geothermal Congress 2005 Antalya, Turkey, 24-29 April 2005 1 Geothermal: Martinique, geothermal exploration, thermal springs, soil gas profiles, chemical geothermometers ABSTRACT in starting again geothermal research on the Martinique island, in the Lesser Antilles. The first works, which

Paris-Sud XI, Université de

394

143 164 143 612Ma 653Ma  

E-Print Network [OSTI]

Cathelineau, M. and Nieva, D. (1985) A chlorite solid solution geothermometer, the Los Azufres (Mexico) geothermal system. Contrib. Mineral. Petrol., 91, 235-244. Charvet, J., Lapierre, H. and Yu, Y. (1994 of the Tungliang well TL-1 of the Penghu Island. Petrol. Geol. Taiwan, 5, 131-149. #12;158 Jahn, B.M., Chen, P

Chen, Wen-Shan

395

Quantitative evaluation of ammonium hydrosulfide reagent for precipitation of group II cations at 1.0 molar hydrogen ion concentration and for separation of group II and group III cations  

E-Print Network [OSTI]

, . 9 melen by~@en ion oenoen4xatien when eeyanaClen ef 1i yLtatmg a Grid XX ea4Xen, ne 4' evlfMe, e4 X. O ? CXt &44k O@KLCGXAX'8. '49. GB 8%6. l)p' pX'4IQigi484~ S 6M'gp XXX - ed%. ee @+~&9. 8e xi@@ ed, MXg ~eniermX ee1u41ea. Ree~qMee ' eX' 8k@ ~i...~es--'ljx'emefex'xe@ Co e $09 @1? Be'DexGGotp f ' -T sekima'&XameChate AzemJo, . (XXX) . Dlengaxwtee (XI) . Gep@rnexomt . , %'ice. exeemlomp yxldte, ewxyle i eea:4keaqgve@ e45h. ; . %+8 . 8@Xggi@@' Wee '48gef Q$Xg 5894?elkee8 bp' @g'gp@@S! ~N$'45' 1 @f"8" eLL~ -?OS...

Ramsey, Jerry Warren

2012-06-07T23:59:59.000Z

396

Development of Cathode Architectures Customized for H2/O2 Metal-Cation-Free Alkaline Membrane Fuel Cells  

Science Journals Connector (OSTI)

A final significant finding was that Pt-free Vulcan XC-72R?only cathodes can produce between 25% and 36% of the power obtained when Pt/C catalysts were used in SPE-AFCs (this is not the case with PEMFCs where carbon is electrokinetically inactive for the oxygen reduction reaction at the cathode); this insight highlights the necessity of recording the background currents, arising from the carbon supports, when testing different catalyst formulations in alkaline media. ... The Ag/C catalyst performed poorly for the hydrogen oxidation reaction (HOR) at the anode of a SPE-AFC and for the ORR at the cathode of a PEMFC. ... MEA E containing the E-Tek-catalyzed carbon paper electrode did not perform as well as MEA A. ...

Christelle Tamain; Simon D. Poynton; Robert C. T. Slade; Bryony Carroll; John R. Varcoe

2007-11-10T23:59:59.000Z

397

Properties of some ionic liquids based on 1-methyl-3-octylimidazolium and 4-methyl-N-butylpyridinium cations.  

E-Print Network [OSTI]

Ionic liquids as green solvents: progress and prospects.ionic liquids are “green” solvents, i.e. , environmentally

Papaiconomou, Nicolas; Yakelis, Neal; Salminen, Justin; Bergman, Robert; Prausnitz, John M.

2005-01-01T23:59:59.000Z

398

Crystallization Pathways of Multicomponent Oxide Nanocrystals: Critical Role of the Metal Cations Distribution in the Case Study of Metal Ferrites  

Science Journals Connector (OSTI)

Mauro Epifani *†, Jordi Arbiol ‡, Teresa Andreu §?, and Joan R. Morante §? ... Epifani, Mauro; Diaz, Raul; Arbiol, Jordi; Comini, Elisabetta; Sergent, Nicolas; Pagnier, Thierry; Siciliano, Pietro; Faglia, Guido; Morante, Joan R. ... Epifani, Mauro; Arbiol, Jordi; Andreu, Teresa; Morante, Joan R. ...

Mauro Epifani; Jordi Arbiol; Teresa Andreu; Joan R. Morante

2010-10-27T23:59:59.000Z

399

Anti-HER2 Cationic Immunoemulsion as a Potential Targeted Drug Delivery System for the Treatment of Prostate Cancer  

Science Journals Connector (OSTI)

...and response to treatment with a HER2-directed...single agent for the treatment of these patients...concentrations in oil/water nanoemulsions will...Germany) at 25C using water as the solvent...unconjugated mAbs by dialysis using a polyvinylidene...for transmission electron microscopy (TEM...

Danny Goldstein; Ofer Gofrit; Abraham Nyska; and Simon Benita

2007-01-01T23:59:59.000Z

400

The interrelations of mineral colloids and sodium chloride as measured by pH, conductivity, and water-soluble cations  

E-Print Network [OSTI]

?nos material, then any endothermic or exothermic re- action vill appear on the dehydratfon curve shoving the temperature differences as a function of the tenperature of the reference notarial. Page (43)x and Eendricks and Alexander {19) described equipnent... (exothermic) and a deflection in the opposite direction is noted on the gslvancmeter. Ths deflection on the galvancseter is proportional to e. m. f. created which is dependent upce the amount of heat abaca'bed or liberated in the sample being idcntif ied...

Crozier, Baalis B

1952-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Morphological stability and metabolic activity of rice (Oryza sativa L.) protoplasts in media supplemented with polyamines and divalent cations  

E-Print Network [OSTI]

-linear regression analyses. All the three levels (lmM, 10mM and 20mM) of putrescine showed earlier times for maximum uptake rate and higher maximum values, whereas, in general, all the treatments had earlier times for maximum uptake rate but lower maximum values.... The "universal" solvent, which was used also as the wash solution and for preparing different chemical treatments and simply as a control, consisted of 0. 5M mannitol as osmotic buffer (Maeda and Hagiwara, 12 1974), lmM phosphate at pH 5. 7 as pH buffer...

Adhikary, Bharat Raj

2012-06-07T23:59:59.000Z

402

A Novel, Modification-Dependent ATP-Binding Aptamer Selected from an RNA Library Incorporating a Cationic Functionality  

E-Print Network [OSTI]

A Novel, Modification-Dependent ATP-Binding Aptamer Selected from an RNA Library Incorporating this library yielded a novel receptor that binds ATP under physiological pH and salt conditions in a manner structure model for the ATP binding site were obtained by the analysis of functional sequences selected from

Heller, Eric

403

MacroCapTM SP is a cation exchanger designed for the purification of large biomolecules such as polyethylene  

E-Print Network [OSTI]

such as polyethylene glycol (PEG)-modified proteins (i.e., PEGylated proteins) that are intended for use

Lebendiker, Mario

404

A Complete Basis Set Estimate of Cation-p Bond Strengths: Na+(ethylene) and Na+(benzene)  

SciTech Connect (OSTI)

Large scale second order perturbation theory and couple cluster theory calculations were performed on the Na+(ethylene) and Na+(benzene) complexes in an effort to estimate binding enthalpies in the complete basis set limit. The resulting best estimates are DH0[Na+(ethylene)] = -13.7 ? 0.2 kcal/mol and DH0[Na+(benzene)] = -23.9 ? 0.3 kcal/mol, which include small corrections for core/valence correlation effects. The former value can be compared to a measurement of -10.3 ? 1.0 kcal/mol obtained from collision induced dissociation, while the latter value is approximately midway between the two existing experimental values which differed by 6.5 kcal/mol. For the basis sets considered in this study, the counterpoise-corrected binding energies were found to be in much worse agreement with the complete basis set limit than the raw values.

Feller, David F.

2000-06-02T23:59:59.000Z

405

Cation-Induced Collapse of Low-Molecular-Weight Polyacrylic Acid in the Dispersion of Barium Titanate  

Science Journals Connector (OSTI)

Observations on the steric layers formed by the adsorption of low-molecular-weight polyacrylic acid (PAA) were taken using the colloidal probe method in an atomic force microscope. The effects of divalent barium ions and of monovalent potassium ions at varying concentrations were observed on the repulsive interaction profiles. High ionic concentrations screened double-layer forces to small distances, whereby the acting forces were reduced to steric interactions. De Gennes scaling theory was used to model the effect of electrolyte on an aqueous barium titanate system, which was stabilized with PAA. The brush model was found to represent the force curves better than the mushroom model. The collapse of PAA layers with increasing salt approximated a grafted polymer brush in monovalent electrolyte, but the addition of barium ions caused markedly less steric collapse. It is suggested that the formation of a Ba2+–PAA complex in the adsorbed layer increases its compressibility parameter.

Nelson S. Bell; Jürgen Sindel; F. Aldinger; Wolfgang M. Sigmund

2002-01-01T23:59:59.000Z

406

Two-dimensional NMR spectroscopy reveals cation-triggered backbone degradation in polysulfone-based anion exchange membranes  

Science Journals Connector (OSTI)

...Alkaline Membrane Fuel Cell Workshop final report: Proceedings from the Alkaline Membrane Fuel Cell Workshop. Available at www1.eere.energy.gov/hydrogenandfuelcells/wkshp_alkaline_membrane.html, pp 1–28. Accessed August 7, 2012 . 6 Pletcher...

Christopher G. Arges; Vijay Ramani

2013-01-01T23:59:59.000Z

407

Effect of sodium montmorillonite nanoclay on the water absorbency and cationic dye removal of carrageenan-based nanocomposite superabsorbents  

Science Journals Connector (OSTI)

Nanocomposite superabsorbents were synthesized by simultaneously solution copolymerization of acrylamide (AAm) and sodium acrylate (Na-AA) in the presence of carrageenan biopolymer and sodium montmorillonite (Na-...

Gholam Reza Mahdavinia; Bakhshali Massoumi; Karim Jalili…

2012-08-01T23:59:59.000Z

408

Sequential Bayesian Semi-Parametric Binary Classi cation yChristophe Andrieu - Nando de Freitas -zArnaud Doucet  

E-Print Network [OSTI]

on a simple example and on the problem of fault detection of dynamical operated marine diesel engines the problem of sequential fault detection in marine diesel engines (H#28;jen-S#28;rensen, de Freitas and Fog and Electronic Engineering, University of Melbourne, Parkville, Victoria 3052, Australia. Email: doucet

de Freitas, Nando

409

Computational methods enabling genome-based protein identifi-cation from large, complex genomes using mass spectrometry  

E-Print Network [OSTI]

of sample protein(s). It has performed well in studies involving rela- tively small genomes (E. coli and S106 peptides of the E. coli genome digest with 2 missed cleavages, it will take ~83 hours to perform structure (multiple exons). The first hurdle that must be overcome to effectively apply such algorithms

Khatun, Jainab

410

Mixed cation phases in sputter deposited HfO{sub 2}-TiO{sub 2} nanolaminates  

SciTech Connect (OSTI)

Nanolaminate HfO{sub 2}-TiO{sub 2} films are grown by reactive sputter deposition on unheated fused SiO{sub 2}, sequentially annealed at 573 to 973 K, and studied by x-ray diffraction. A nanocrystalline structure of orthorhombic (o) HfTiO{sub 4} adjacent to an interface followed by monoclinic (m) Hf{sub 1-x}Ti{sub x}O{sub 2} is identified. m-Hf{sub 1-x}Ti{sub x}O{sub 2}, a metastable phase, is isomorphous with m-HfO{sub 2} and a high pressure phase, m-HfTiO{sub 4}. A Vegard's law analysis shows that the Ti atomic fraction in m-Hf{sub 1-x}Ti{sub x}O{sub 2} is much greater than Ti equilibrium solubility in m-HfO{sub 2}. A space group-subgroup argument proposes that m-Hf{sub 1-x}Ti{sub x}O{sub 2} arises from an o/m-HfTiO{sub 4} second order phase transition to accommodate the larger Hf atom.

Cisneros-Morales, M. C.; Aita, C. R. [Advanced Coatings Experimental Laboratory, College of Engineering and Applied Science, University of Wisconsin-Milwaukee, P.O. Box 784, Milwaukee, Wisconsin 53201 (United States)

2008-07-14T23:59:59.000Z

411

Gas-Phase Reactions of Doubly Charged Lanthanide Cations with Alkanes and Alkenes. Trends in Metal(2+) Reactivity  

E-Print Network [OSTI]

alkanes (methane, ethane, propane, n-butane) and alkenes (and 9, respectively). With propane and n-butane, all the Lnin the reactions of La 2+ with propane and n-butane, and the

Gibson, John K.

2010-01-01T23:59:59.000Z

412

Stabilization, Injection and Control of Quantum Cascade Lasers, and Their Appli-cation to Chemical Sensing in the Infrared  

SciTech Connect (OSTI)

Quantum cascade lasers (QCLs) are a relatively new type of semiconductor laser operating in the mid- to long-wave infrared. These monopolar multilayered quantum well structures can be fabricated to operate anywhere between 3.5 microns and 20 microns, which includes the molecular fingerprint region of the in-frared. This makes them an ideal choice for infrared chemical sensing, a topic of great interest at present. Frequency stabilization and injection locking increase the utility of QCLs. We present results of locking quantum cascade lasers to optical cavities, achieving relative linewidths down to 5.6 Hz. We report injec-tion locking of one distributed feedback grating QCL with light from a similar QCL, demonstrating capture ranges of up to ±500 MHz, and suppression of amplitude modulation by up to 49 dB. We also present various cavity-enhanced chemical sensors employing the frequency stabilization techniques developed, in-cluding the resonant sideband technique known as Nice-Ohms. Sensitivities of 9.7 x 10-11 cm-1 Hz-1/2 have been achieved in nitrous oxide.

Taubman, Matthew S.; Myers, Tanya L.; Cannon, Bret D.; Williams, Richard M.

2004-12-01T23:59:59.000Z

413

A Target Factor Analytical Model for Solute-Sorbent Interactions Using Retention Indices for Hydrocarbons on Cation-Exchange Resins  

Science Journals Connector (OSTI)

......factor analyzed data for 40 hydrocarbons on seven ionic...tests for the heat of combustion and for cyclic...chromatographic data, the latter...r s Solute* Heat of combustion Cyclic uniqueness...reproduced the data with an rms......

Darryl G. Howery; Joseph M. Soroka

1987-04-01T23:59:59.000Z

414

Double Layer Formation and Cation Pseudo-Intercalation Supercapacitor Carbon Nanotube Composite Electrodes With Enhanced Electrochemical Performances.  

E-Print Network [OSTI]

??Among electrochemical energy storage solutions, redox-free supercapacitors exhibit the highest power densities and best cycle life, easily reaching over one million cycles. Despite these attributes,… (more)

Rangom, Yverick

2015-01-01T23:59:59.000Z

415

Characterization of selective binding of alkali cations with carboxylate by x-ray absorption spectroscopy of liquid microjets  

E-Print Network [OSTI]

sodium acetate, and lithium acetate revealing distinctpotassium, and lithium with acetate and formate anions informate and acetate solutions containing lithium, sodium,

Uejio, Janel S.

2008-01-01T23:59:59.000Z

416

Water-Chemistry Evolution and Modeling of Radionuclide Sorption and Cation Exchange during Inundation of Frenchman Flat Playa  

SciTech Connect (OSTI)

Atmospheric tests and other experiments with nuclear materials were conducted on the Frenchman Flat playa at the Nevada National Security Site, Nye County, Nevada; residual radionuclides are known to exist in Frenchman Flat playa soils. Although the playa is typically dry, extended periods of winter precipitation or large single-event rainstorms can inundate the playa. When Frenchman Flat playa is inundated, residual radionuclides on the typically dry playa surface may become submerged, allowing water-soil interactions that could provide a mechanism for transport of radionuclides away from known areas of contamination. The potential for radionuclide transport by occasional inundation of the Frenchman Flat playa was examined using geographic information systems and satellite imagery to delineate the timing and areal extent of inundation; collecting water samples during inundation and analyzing them for chemical and isotopic content; characterizing suspended/precipitated materials and archived soil samples; modeling water-soil geochemical reactions; and modeling the mobility of select radionuclides under aqueous conditions. The physical transport of radionuclides by water was not evaluated in this study. Frenchman Flat playa was inundated with precipitation during two consecutive winters in 2009-2010 and 2010-2011. Inundation allowed for collection of multiple water samples through time as the areal extent of inundation changed and ultimately receded. During these two winters, precipitation records from a weather station in Frenchman Flat (Well 5b) provided information that was used in combination with geographic information systems, Landsat imagery, and image processing techniques to identify and quantify the areal extent of inundation. After inundation, water on the playa disappeared quickly, for example, between January 25, 2011 and February 10, 2011, a period of 16 days, 92 percent of the areal extent of inundation receded (2,062,800 m2). Water sampling provided valuable information about chemical processes occurring during inundation as the water disappeared. Important observations from water-chemistry analyses included: 1) total dissolved solids (TDS) and chloride ion (Cl-) concentrations were very low (TDS: < 200 mg/L and Cl-: < 3.0 mg/L, respectively) for all water samples regardless of time or areal extent; 2) all dissolved constituents were at concentrations well below what might be expected for evaporating shallow surface waters on a playa, even when 98 to 99 percent of the water had disappeared; 3) the amount of evaporation for the last water samples collected at the end of inundation, estimated with the stable isotopic ratios ?2H or ?18O, was approximately 60 percent; and 4) water samples analyzed by gamma spectroscopy did not show any man-made radioactivity; however, the short scanning time (24 hours) and relative chemical diluteness of the water samples (TDS ranged between 39 and 190 mg/L) may have contributed to none being detected. Additionally, any low-energy beta emitting radionuclides would not have been detected by gamma spectroscopy. From these observations, it was apparent that a significant portion of water on the playa did not evaporate, but rather infiltrated into the subsurface (approximately 40 percent). Consistent with this water chemistry-based conclusion is particle-size analysis of two archived Frenchman Flat playa soils samples, which showed low clay content in the near surface soil that also suggested infiltration. Infiltration of water from the playa during inundation into the subsurface does not necessarily imply that groundwater recharge is occurring, but it does provide a mechanism for moving residual radionuclides downward into the subsurface of Frenchman Flat playa. Water-mineral geochemical reactions were modeled so that changes in the water chemistry could be identified and the extent of reactions quantified. Geochemical modeling showed that evaporation; equilibrium with atmospheric carbon dioxide and calcite; dissolution of sodium chloride, gypsum, and composite volcanic g

Hershey, Ronald; Cablk, Mary; LeFebre, Karen; Fenstermaker, Lynn; Decker, David

2013-08-01T23:59:59.000Z

417

CATIONIC SHELL CROSSLINKED NANOPARTICLES AS INTRACELLULAR DELIVERY VEHICLES FOR THE DIAGNOSIS AND TREATMENT OF ACUTE LUNG INJURY  

E-Print Network [OSTI]

for refining the synthetic methods in the production of SCK nanoparticles for the treatment of ALI are described....

Florez, Stephanie

2011-08-08T23:59:59.000Z

418

Reverse-Micelle Formation in the Partitioning of Trivalent f-Element Cations by Biphasic Systems Containing a Tetraalkyldiglycolamide  

Science Journals Connector (OSTI)

The conditions for reverse-micelle formation were studied for solutions of tetra-n-octyldiglycolamide (TODGA) in alkane diluents equilibrated with aqueous solutions of nitric or hydrochloric acids in the presence and absence of Nd3+. Small-angle neutron ...

Mark P. Jensen; Tsuyoshi Yaita; Renato Chiarizia

2007-03-29T23:59:59.000Z

419

Extended Near-Infrared Resonance Raman Investigations of an Organic Mixed-Valence System: Diazatetracyclodiene Radical Cation  

E-Print Network [OSTI]

Extended Near-Infrared Resonance Raman Investigations of an Organic Mixed-Valence System near-infrared region show that six modes are coupled to the intramolecular charge-transfer transition transfer (IVCT) absorption bands in the red to near- infrared region of the spectrum, which are, at least

420

Supporting information Evolution of Hollow TiO2 Nanostructures via the Kirkendall Effect Driven by Cation  

E-Print Network [OSTI]

above except precursor supply and temperature adjustments. In the control experiments of surface temperature was maintained at 600 °C during the entire growth process. TiCl4 and H2O vapors were pulsed for characterization. (2) Control experimental details and polycrystalline film coating condition. All control

Wang, Xudong

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A Four-Coordinate Fe(III) Porphyrin Cation Ming Fang, Scott R. Wilson, and Kenneth S. Suslick*  

E-Print Network [OSTI]

porphyrin5 (5,10,15,20-tetrakis(2,6-dihydroxyphenyl)porphyrin with triisopropyl chlorosilane using imidazole synthesis of the pure complexes, which show very different chemical shifts and have different spin states

Suslick, Kenneth S.

422

Search for variation of fundamental constants: Strong enhancements in $X^2\\Pi$ cations of dihalogens and hydrogen halides  

E-Print Network [OSTI]

We propose to use diatomic molecular ions to search for strongly enhanced effects of variation of fundamental constants. The relative enhancement occurs in transitions between nearly degenerate levels of different nature. Since the trapping techniques for molecular ions have already been developed, the molecules HBr$^+$, HI$^+$, Br$^+_2$, I$^+_2$, IBr$^+$, ICl$^+$, and IF$^+$ are very promising candidates for such future studies.

Pasteka, L F; Flambaum, V V; Schwerdtfeger, P

2015-01-01T23:59:59.000Z

423

Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen  

Open Energy Info (EERE)

Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Volcanic National Park Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Chemistry Of Thermal And Nonthermal Springs In The Vicinity Of Lassen Volcanic National Park Details Activities (2) Areas (1) Regions (0) Abstract: Meaningful applications of water geothermometry to thermal springs in and around Lassen Volcanic National Park (LVNP) are limited to Growler Hot Spring and Morgan Hot Springs. Most hot springs located within LVNP are low-chloride, acid-sulfate waters associated with nearby steam vents. This type of hot-spring activity is characteristically found above vapor-dominated hydrothermal systems. These acid-sulfate waters are not generally useful for liquid chemical geothermometry, however, because their

424

Thermal extraction analysis of five Los Azufres production wells  

SciTech Connect (OSTI)

Thermal energy extraction from five wells supplying 5-MWe wellhead generators in three zones of the Los Azufres geothermal field has been examined from production and chemical data compiled over 14-years of operation. The data, as annual means, are useful in observing small-scale changes in reservoir performance with continuous production. The chemical components are chloride for quality control and the geothermometer elements for reservoir temperatures. The flowrate and fluid enthalpy data are used to calculate the thermal extraction rates. Integration of these data provides an estimate of the total energy extracted from the zone surrounding the well. The combined production and chemical geothermometer data are used to model the produced fluid as coming from just-penetrating wells for which the annual produced mass originates from a series of concentric hemispheric shells moving out into the reservoir. Estimates are made of the drawdown distance into the reservoir and the far-field conditions.

Kruger, Paul; Quijano, Luis

1995-01-26T23:59:59.000Z

425

Water-Rock interaction in the Long Valley Caldera (USA)  

Science Journals Connector (OSTI)

Water-rock interactions within the main thermal aquifer in the Long Valley Caldera are evaluated using water chemistry data from a new suite of samples. The results reflect the impact of increased geothermal production and major CO2 loss, which appears to drive calcite precipitation in the aquifer. The study provides qualitative information on the rates of mineral reactions and the response times of chemical geothermometers to declining temperatures.

W.C. Evans; S. Hurwitz; D. Bergfeld; J. Lewicki; M.A. Huebner; C.F. Williams; S.T. Brown

2013-01-01T23:59:59.000Z

426

E-Print Network 3.0 - alkaline earth lithium Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

the cation (alkaline, rare earth... to the cation size. Knowing that the size of rare earth elements and alkaline cations decreases in the following... of results on tungstate...

427

EXTENDING THE PREDICTION OF THE THERMODYNAMIC PROPERTIES OF CLAY  

E-Print Network [OSTI]

O=MZ+ (ox) (J/mol.K) Interlayer cations TOT cations + brucitic sheet Fig. 1 - Development of predictive

Paris-Sud XI, Université de

428

Phosphorylation of the synthetic octapeptide pyroGlu-ASP-ASP-SER-ASP-GLU-GLU-ASN and binding to DNA in presence of divalent cations  

Science Journals Connector (OSTI)

Small acidic peptides involved in gene expression have been isolated from prokaryotic and eukaryotic cells. Synthetic peptides, designed on the basis of native ... peptides in in vitro reconstituted systems. Thes...

Elena Cardellini; Doria Ponti; Gian Luigi Gianfranceschi

1999-12-01T23:59:59.000Z

429

Pysico-chemical properties of hydrophobic ionic liquids containing 1-octylpyridinium, 1-octyl-2-methylpyridinium or 1-octyl-4-methylpyridinium cations  

E-Print Network [OSTI]

Ionic liquids as green solvents: progress and prospects,in ionic liquid solvents. Green Chem. 2004, 6, 245-249. Xu,solvent structural variations on the mechanism of facilitated ion transfer into room-temperature ionic liquids. Green

Papaiconomou, Nicolas; Salminen, Justin; Lee, Jong-Min; Prausnitz, John M.

2006-01-01T23:59:59.000Z

430

Epitaxial V{sub 0.6}W{sub 0.4}N/MgO(001): Evidence for ordering on the cation sublattice  

SciTech Connect (OSTI)

V{sub 0.6}W{sub 0.4}N alloys are grown on MgO(001) by ultrahigh vacuum reactive magnetron sputtering from V and W targets in 10 mTorr pure-N{sub 2} atmospheres at temperatures T{sub s} ranging from 600 to 900 Degree-Sign C. Based on x-ray diffraction and transmission electron microscopy results, all films have the B1-NaCl crystal structure and grow with a cube-on-cube epitaxial relationship to the substrate, (001){sub VWN} Double-Vertical-Line (001){sub MgO} and [100]{sub VWN} Double-Vertical-Line [100]{sub MgO}. Rutherford backscattering spectrometry analyses show that the N content in V{sub 0.6}W{sub 0.4}N{sub x} alloys decreases with increasing T{sub s} from overstoichiometric with x = 1.13 at 600 Degree-Sign C, to approximately stoichiometric with x = 1.08 at 700 Degree-Sign C, to understoichiometric at 800 Degree-Sign C (x = 0.80) and 900 Degree-Sign C (x = 0.75). High-resolution scanning transmission electron microscopy, Z-contrast, and selected-area electron diffraction investigations of V{sub 0.6}W{sub 0.4}N(001) alloys grown at 600 and 700 Degree-Sign C reveal the onset of W ordering on adjacent 111 planes of the metal sublattice; no ordering is observed for understoichiometric films grown at higher temperatures.

Kindlund, H.; Lu, J.; Jensen, J.; Hultman, L. [Thin Film Physics Division, Department of Physics (IFM), Linkoeping University, SE-58183 Linkoeping (Sweden); Petrov, I.; Greene, J. E. [Thin Film Physics Division, Department of Physics (IFM), Linkoeping University, SE-58183 Linkoeping (Sweden); Department of Materials Science and the Fredrick Seitz Materials Research Laboratory, University of Illinois, 104 South Goodwin, Urbana, Illinois 61801 (United States)

2013-07-15T23:59:59.000Z

431

The Lipopolysaccharide of Brucella abortus BvrS/BvrR Mutants Contains Lipid A Modifications and Has Higher Affinity for Bactericidal Cationic Peptides  

Science Journals Connector (OSTI)

...Bruker Analytische Messtechnik) at 400 MHz. The amounts of O- and NH-polysaccharides...overnight in 96-well plates under a 7% CO2 atmosphere at 37C. Shigella flexneri serotype 5a...Yersinia, and Escherichia as seen by 252Cf plasma desorption mass spectrometry. J. Biol...

Lorea Manterola; Ignacio Moriyón; Edgardo Moreno; Alberto Sola-Landa; David S. Weiss; Michel H. J. Koch; Jörg Howe; Klaus Brandenburg; Ignacio López-Goñi

2005-08-15T23:59:59.000Z

432

Cationic Amphiphile with Shikimic Acid Headgroup Shows More Systemic Promise Than Its Mannosyl Analogue as DNA Vaccine Carrier in Dendritic Cell Based Genetic Immunization  

Science Journals Connector (OSTI)

Zhai, Y.; Yang, J. C.; Spiess, P.; Nishimura, M. I.; Overwijk, W. W.; Roberts, B.Cloning and characterization of the genes encoding the murine homologues of the human melanoma antigens MART1 and gp100 J. Immunother. ... Zhai, Yifan; Yang, James C.; Spiess, Paul; Nishimura, Michael I.; Overwijk, Willem W.; Roberts, Bruce; Restifo, Nicholas P.; Rosenberg, Steven A. ...

Ramishetti Srinivas; Priya P. Karmali; Dipankar Pramanik; Arup Garu; Yenugonda Venkata Mahidhar; Bharat K. Majeti; Sistla Ramakrishna; Gunda Srinivas; Arabinda Chaudhuri

2010-01-05T23:59:59.000Z

433

Pore with Gate: Enhancement of the Isosteric Heat of Adsorption of Dihydrogen via Postsynthetic Cation Exchange in Metal?Organic Frameworks  

Science Journals Connector (OSTI)

Three isostructural anionic frameworks {[(Hdma)(H3O)][In2(L1)2]·4DMF·5H2O}? (NOTT-206-solv), {[H2ppz][In2(L2)2]·3.5DMF·5H2O}? (NOTT-200-solv), and {[H2ppz][In2(L3)2]·4DMF·5.5H2O}? (NOTT-208-solv) (dma = dimethylamine; ppz = piperazine) each featuring ...

Sihai Yang; Gregory S. B. Martin; Jeremy J. Titman; Alexander J. Blake; David R. Allan; Neil R. Champness; Martin Schröder

2011-09-07T23:59:59.000Z

434

Syntheses and characterization of energetic compounds constructed from alkaline earth metal cations (Sr and Ba) and 1,2-bis(tetrazol-5-yl)ethane  

SciTech Connect (OSTI)

Two new energetic compounds, [M(BTE)(H{sub 2}O){sub 5}]{sub n} (M=Sr(1), Ba(2)) [H{sub 2}BTE=1,2-bis(tetrazol-5-yl)ethane], have been hydrothermally synthesized and structurally characterized. Single-crystal X-ray diffraction analyses reveal that they are isomorphous and exhibit 2D (4,4) net framework, generated by 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs linked up by two independent binding modes of H{sub 2}BTE, and the resulting 2D structure is interconnected by hydrogen-bond and strong face to face {pi}-{pi} stacking interactions between two tetrazole rings to lead to a 3D supramolecular architecture. DSC measurements show that they have significant catalytic effects on thermal decomposition of ammonium perchlorate. Moreover, the photoluminescence properties, thermogravimetric analyses, and flame colors of the as-prepared compounds are also investigated in this paper. - Graphical abstract: Two novel 2D isomorphous alkaline earth metal complexes were assembled by 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs and two independent binding modes of H{sub 2}BTE ligands, and the catalytic performances toward thermal decomposition of ammonium perchlorate and photoluminescent properties of them were investigated. Highlights: > Two novel alkaline earth energetic coordination polymers have been prepared.{yields} Both structures are layered based on 4-connected Sr{sub 2}(H{sub 2}O){sub 10}/Ba{sub 2}(H{sub 2}O){sub 10} SBUs and two distinct H{sub 2}BTE coordination modes.{yields} The dehydrated products of the compounds possess good thermostability and significant catalytic effects on thermal decomposition of AP.

Xia Zhengqiang [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Chen Sanping, E-mail: sanpingchen@126.com [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Wei Qing, E-mail: weiqq@126.com [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China); Qiao Chengfang [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an, Shaanxi 710069 (China)

2011-07-15T23:59:59.000Z

435

Neutral and Cationic Vanadium Bisimido Complexes: Their Synthesis, Characterization, and Application in the Binding, Activation, and Catalytic Functionalization of Small Molecules  

E-Print Network [OSTI]

point of comparison is the V(III) (PNP ipr )VTe(CNXyl)2 (PNP ipr = N(2-PiPr 2 -4- methylphenyl) 2 ), which possessof 2164 cm -1 , and (PNP ipr )VTe(CNXyl) 2 has stretching

La Pierre, Henry Storms

2011-01-01T23:59:59.000Z

436

Formation of anions and cations via a binary-encounter process in OH$^+$ + Ar collisions: the role of dissociative excitation and statistical aspects  

E-Print Network [OSTI]

Molecular fragmentation leading to the formation of negatively and positively charged hydrogen ions in 7-keV OH$^+$ + Ar collisions is investigated experimentally. The most striking finding is that negative and positive hydrogen ions are emitted with very similar angular dependences. Also, the kinetic energy distribution of the H$^+$ fragment shows strong similarities with that of the ejected H$^-$ ion. The kinematics of the emitted H core is found to be essentially driven by its scattering on the atomic target. However, in addition to this binary-encounter process, dissociative electronic excitation of the molecular projectile has to be invoked to explain the observed fragmentation patterns. Though the electron capture process is complex, it is shown that the relative population of the different final charge states of the outgoing fragments can be described by simple statistical laws.

Lattouf, E; Chesnel, J -Y; Kovács, S T S; Bene, E; Herczku, P; Huber, B A; Méry, A; Poully, J -C; Rangama, J; Sulik, B

2015-01-01T23:59:59.000Z

437

Direct Atomic-Scale Observation of Redox-Induced Cation Dynamics in an Oxide-Supported Monolayer Catalyst: WOx/r-Fe2O3(0001)  

E-Print Network [OSTI]

Catalyst: WOx/r-Fe2O3(0001) Zhenxing Feng, Chang-Yong Kim,§ Jeffrey W. Elam,| Qing Ma, Zhan Zhang catalysts for industrial processes.1 Typically, a catalyst exhibits greater activity as a monolayer (ML the structure of the catalyst affects chemical reactions, as, for example, in the proposed case

Mohseni, Hooman

438

Dr. Ing. /PhD / Dr.techn. Students supervised by Signe Kjelstrup 1. Torleif Holt, Transport and equilibrium properties of a cation exchange membrane (1983)  

E-Print Network [OSTI]

, (1996) 6. Magnar Ottøy, Mass and heat transfer in ion-exchange membranes (1996) 7. Belinda Flem, Peltier in the Polymer Electrolyte Membrane Fuel Cell (2007) 17. Isabella Inzoli, Coupled transports of heat and massDr. Ing. /PhD / Dr.techn. Students supervised by Signe Kjelstrup 1. Torleif Holt, Transport

Kjelstrup, Signe

439

Pt/[Fe]ZSM-5 modified by Na and Cs cations: an active and selective catalyst for dehydrogenation of n-alkanes to n-alkenes  

E-Print Network [OSTI]

-flow hydro- dynamics. Samples (0.1 g, 180­250 mm diameter pellets) were treated in 40% H2 (Praxair, 99.999%, 0.20 cm3 s21 ) in He (Praxair, 99.999%, 0.30 cm3 s21 ) at 673 K for 2 h. Reactant and product

Iglesia, Enrique

440

Arg-52 in the Melibiose Carrier ofEscherichia coli Is Important for Cation-Coupled Sugar Transport and Participates in an Intrahelical Salt Bridge  

Science Journals Connector (OSTI)

...Evidence for a salt bridge has been presented...channel (), the H ATPase of Saccharomyces...intrahelical salt bridge in UhpT, the sugar...Escherichia coli. . H. Hama T. H. Wilson...Hwang C. Hansen T. H. Wilson Possible salt bridges between transmembrane...

Peter J. Franco; T. Hastings Wilson

1999-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Phosphorylation of Thellungiella salsuginea Dehydrins TsDHN-1 and TsDHN-2 Facilitates Cation-Induced Conformational Changes and  

E-Print Network [OSTI]

as dehydrins, are intrinsically disordered proteins that are expressed in plants experiencing extreme acids.18 Most LEA proteins are intrinsically disordered proteins (IDPs).12,19,20 It is generally accepted that the intrinsically disordered and extended conformation of LEA proteins allows them

Dutcher, John

442

The Role of the Peripheral Anionic Site and Cation?? Interactions in the Ligand Penetration of the Human AChE Gorge  

Science Journals Connector (OSTI)

A.C. and M.R. acknowledge support from the University of Bologna (funds for selected research topics). ... (35)?Jorgensen, W. L.; Chandrasekhar, J.; Madura, J. D.; Impey, R. W.; Klein, M. L. J. Chem. ...

Davide Branduardi; Francesco Luigi Gervasio; Andrea Cavalli; Maurizio Recanatini; Michele Parrinello

2005-06-01T23:59:59.000Z

443

H Solid-State NMR Study of Lipid Clustering by Cationic Antimicrobial and Cell-Penetrating Peptides in Model Bacterial Membranes  

E-Print Network [OSTI]

(AMPs) of the b-hairpin family of protegrin-1 (PG-1), and two cell-penetrating peptides (CPPs), HIV TAT into the ordered phase, whereas all of the POPG remained in the disordered phase. In comparison, TAT rigidified POPE and POPG similarly in the binary membrane at ambient temperature, indicating that TAT does

Hong, Mei

444

Interaction of M3+ Lanthanide Cations with Diamide Ligands and Their Thia Analogues:? A Quantum Mechanics Study of Monodentate vs Bidentate Binding, Counterion Effects, and Ligand Protonation  

Science Journals Connector (OSTI)

(19)?Nigond, L.; Condamines, N.; Cordier, P. Y.; Livet, J.; Madic, C.; Cuillerdier, C.; Musikas, C. Sep. ... (64)?Nigond, L.; Musikas, C.; Cuillerdier, C. Solv. ...

Christian Boehme; Bernard Coupez; Georges Wipff

2002-06-17T23:59:59.000Z

445

JOURNAL DE PHYSIQUE Colloque C7, supplement au n 12, Tome 37, Decembre 1976, page C7-359 CATIONIC HEATS OF TRANSPORT AND VACANCY LIFETIMES  

E-Print Network [OSTI]

HEATS OF TRANSPORT AND VACANCY LIFETIMES IN SINGLE CRYSTALS OF SODIUM CHLORIDE AND POTASSIUM CHLORIDE A on resistance along with corresponding driving forces provides a means for estimation of vacancy lifetimes of this experimental work. Theory. -- In a material at equilibrium, vacancies are produced and annihilated at a rate

Paris-Sud XI, Université de

446

UCOWRJournal of Contemporary Water researCh & eduCation Universities CoUnCil on Water resoUrCes  

E-Print Network [OSTI]

and construction increased. Prior to 1953 dikes were built to the height of the previously known high- water level plus a margin of safety (Jonkman et al. 2004). Following the catastrophic flood of 1953, the Delta 1960). This flood also brought significant mining #12;debris, covering the land near Marysville

Pasternack, Gregory B.

447

Hydroprobe | Open Energy Information  

Open Energy Info (EERE)

Hydroprobe Hydroprobe Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Hydroprobe Details Activities (2) Areas (2) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Drilling Techniques Exploration Sub Group: Exploration Drilling Parent Exploration Technique: Exploration Drilling Information Provided by Technique Lithology: Stratigraphic/Structural: Hydrological: Collection of ground water samples for geochemistry and geothermometry Thermal: Temperature measurements down to 50 m Dictionary.png Hydroprobe: An exploratory drilling technique focused on collecting geothermal fluid samples from shallow depths at relatively inexpensive costs and low environmental impact. Other definitions:Wikipedia Reegle Introduction A hydroprobe is a relitively inexpensive and easily portable truck mounted

448

Rock Sampling At Socorro Mountain Area (Armstrong, Et Al., 1995) | Open  

Open Energy Info (EERE)

Armstrong, Et Al., 1995) Armstrong, Et Al., 1995) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Rock Sampling At Socorro Mountain Area (Armstrong, Et Al., 1995) Exploration Activity Details Location Socorro Mountain Area Exploration Technique Rock Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Corresponding Socorro caldera Carboniferous rocks were studied in the field in 1988-1992-Renault later completed geochemistry and silica-crystallite geothermometry, Armstrong petrographic analysis and cathodoluminescence, Oscarson SEM studies, and John Repetski (USGS, Reston, Virgina) conodont stratigraphy and color and textural alteration as guides to the carbonate rocks' thermal history. The carbonate-rock classification used in this

449

Exploratory energy research program of the University of Hawaii at Manoa. Progress report  

SciTech Connect (OSTI)

Progress is reported from the University of Hawaii on: UHM rooftop solar energy laboratory; solar pond cleansing techniques; combustion properties of biomass pyrolysis products; high-temperature solar concentrator absorber; biological abatement of hydrogen sulfide during geothermal energy production; geothermal systems on submarine rift zones of the Hawaiian chain; nitrogenous products of OTEC chlorination; interaction of hydrogen and deuterium with transition metals and their alloys at high pressures; shallow magma chambers and geothermal potential of Haleakala, Maui; effects of OTEC waste water on phytoplankton; sodium-lithium geothermometer; breaking wave forces on OTEC pipes; seismic and thermal properties on basalts. (PSB)

Not Available

1984-01-01T23:59:59.000Z

450

Inventories and capacity utilization in general equilibrium  

E-Print Network [OSTI]

.-Util. Speci cation. : : : : : : : : 106 VI Correlation Matrix: Sep.-Util. Speci cation. : : : : : : : : : : : : : : 106 VII Rate of Capital Utilization: Coe cients of Autocorrelation. : : : : : 106 VIII Relative Standard Deviations: CEE Speci cation.... : : : : : : : : : : : 107 IX Correlation Matrix: CEE Speci cation. : : : : : : : : : : : : : : : : : 107 X Relative Standard Deviations: General Vs Benchmark. : : : : : : : : 108 XI Correlation Matrix: General Speci cation. : : : : : : : : : : : : : : : 108 ix LIST...

Trupkin, Danilo Rogelio

2009-05-15T23:59:59.000Z

451

Forecasting Dangerous Inmate Misconduct: An Applications of Ensemble Statistical Procedures  

E-Print Network [OSTI]

of Ensemble Statistical Procedures ? Richard A. Berk Brianpopular classi?cation procedures do no better than theand employ classi?cation procedures that identify inmates

Richard A. Berk; Brian Kriegler; Jong-Ho Baek

2011-01-01T23:59:59.000Z

452

Microbial carbonates: the geological record of calcied bacterialalgal mats and biolms  

E-Print Network [OSTI]

and/or HCO3 ± by cyanobacteria, and ammoni®cation, denitri®cation and sulphate reduction by other

Riding, Robert

453

E-Print Network 3.0 - alkaline earth chlorides Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: of the alkaline earth cations, magnesium, calcium, and barium on the dissolution kinetics of quartz PATRICIAM... and alkaline earth cations in near-neutralpH solutions. We...

454

Structure, Kinetics, and Thermodynamics of the Aqueous Uranyl...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Kinetics, and Thermodynamics of the Aqueous Uranyl(VI) Cation. Structure, Kinetics, and Thermodynamics of the Aqueous Uranyl(VI) Cation. Abstract: Molecular simulation techniques...

455

Automated Strong Cation Exchange Extraction of Fatty Acid Esters of 3-(N-Phenylamino)-1,2-propanediol from Oil Samples for Routine Quantification by HPLC-APCI/MS/MS  

Science Journals Connector (OSTI)

Fatty acid esters of 3-(N-phenylamino)-1,2-propanediol are currently considered the best chemical markers of toxic oils related to the Spanish toxic oil syndrome. ... The automatic procedure was carried out using a Spark Holland Marathon automatic injector connected to a Prospekt unit provided with a solvent delivery unit for automated SPE (Figure 2). ...

Rosa E. Calaf; Juana Peña; Sonia Paytubi; Montserrat Carrascal; Manuel Posada; Emilio Gelpi; Joaquin Abian

2001-10-05T23:59:59.000Z

456

Cation Ordering in Natural and Synthetic (Cu1–xZnx)2CO3(OH)2 and (Cu1–xZnx)5(CO3)2(OH)6  

Science Journals Connector (OSTI)

In the present paper we report combined experimental and theoretical studies of the UV–vis–NIR spectra of the mineral compounds malachite, rosasite, and aurichalcite and of the precursor compounds for Cu/ZnO catalysts. ... This concept also applies for the mineral aurichalcite, but not for synthetic aurichalcite, which seems to exhibit a lower degree of metal ordering. ... The catalyst precursor was found to be a mixture of zincian malachite and a minor amount of aurichalcite. ...

Sophia Klokishner; Malte Behrens; Oleg Reu; Genka Tzolova-Müller; Frank Girgsdies; Annette Trunschke; Robert Schlögl

2011-07-20T23:59:59.000Z

457

Courses: Education: Special Education (EDSP) Page 305Sonoma State University 2014-2015 Catalog edSp 422 CoLLABorAtiVe pArtnerSHipS And SpeCiAL eduCAtion (4)  

E-Print Network [OSTI]

Credential Program or permission of the instructor. edSp 422A CASe MAnAgeMent And trAnSition pLAnning in Spe and collaboration skills necessary for effective case management and transition planning for individuals case management and transition planning for individuals with exceptional needs. Emphasis is placed

Ravikumar, B.

458

Effects of Mn and Fe Levels on Bacillus subtilis Spore Resistance and Effects of Mn2+, Other Divalent Cations, Orthophosphate, and Dipicolinic Acid on Protein Resistance to Ionizing Radiation  

Science Journals Connector (OSTI)

...exposed to ionizing radiation in vitro display...response to dose, with increasing...doses of gamma radiation increase...within a narrow range of Mn concentrations...from gamma ray doses (15 kGy...resistance to ionizing radiation, desiccation...

Amanda C. Granger; Elena K. Gaidamakova; Vera Y. Matrosova; Michael J. Daly; Peter Setlow

2010-11-05T23:59:59.000Z

459

K{sub 2}NaOsO{sub 5.5} and K{sub 3}NaOs{sub 2}O{sub 9}: The first osmium perovskites containing alkali cations at the 'A' site  

SciTech Connect (OSTI)

K{sub 2}NaOsO{sub 5.5} and K{sub 3}NaOs{sub 2}O{sub 9} were obtained from solid-state reactions of potassium superoxide, sodium peroxide and osmium metal at elevated oxygen pressures. K{sub 2}NaOsO{sub 5.5} crystallizes as an oxygen-deficient cubic double perovskite in space group Fm3{sup Macron }m with a=8.4184(5) A and contains isolated OsO{sub 6} octahedra. K{sub 3}NaOs{sub 2}O{sub 9} crystallizes hexagonally in P6{sub 3}/mmc with a=5.9998(4) A and c=14.3053(14) A. K{sub 3}NaOs{sub 2}O{sub 9} consists of face sharing Os{sub 2}O{sub 9} pairs of octahedra. According to magnetic measurements K{sub 2}NaOsO{sub 5.5} is diamagnetic, whereas K{sub 3}NaOs{sub 2}O{sub 9} displays strong antiferromagnetic coupling (T{sub N}=140 K), indicating enhanced magnetic interactions within the octahedral pair. - Graphical abstract: High oxidation states of Os, obtained by high oxygen pressure synthesis, are accommodated in double and triple perovskite matrices. K{sub 3}NaOs{sub 2}O{sub 9} displays enhanced magnetic interactions. Highlights: Black-Right-Pointing-Pointer New osmates containing highly oxidized Os were obtained by high O{sub 2} pressure synthesis. Black-Right-Pointing-Pointer High oxidation states of Os are accommodated in double and triple perovskite matrices. Black-Right-Pointing-Pointer Both compounds represent the first Os perovskites with an alkali metal at the A site. Black-Right-Pointing-Pointer K{sub 3}NaOs{sub 2}O{sub 9} displays enhanced magnetic interactions within the octahedral pair.

Mogare, Kailash M.; Klein, Wilhelm [Stuttgart, Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, 70569 Stuttgart (Germany); Jansen, Martin, E-mail: M.Jansen@fkf.mpg.de [Stuttgart, Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, 70569 Stuttgart (Germany)

2012-07-15T23:59:59.000Z

460

Use of Nonionic Poly(Ethylene glycol) p-Isooctyl-Phenyl Ether (Triton X-100) Surfactant Mobile Phases in the Thin-Layer Chromatography of Heavy-Metal Cations  

Science Journals Connector (OSTI)

......Article The analytical potential of poly(ethylene glycol) p-isooctyl-phenyl ether...40, March 2002 Use of Nonionic Poly(Ethylene glycol) p-Isooctyl-Phenyl Ether...Bidlingmeyer, S.N. Deming, W.P. Price, B. Sachok, and M. Petrusek. Retention......

Ali Mohammad; Eram Iraqi; Iftkhar Alam Khan

2002-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Partial cation-order and early-stage, phase separation in phase W, LixCo1?xO: 0.075?x?0.24?0.31  

Science Journals Connector (OSTI)

...characterization| 1. Introduction Lithium transition metal oxides are...cathode materials in rechargeable lithium batteries. The current commercial...this system and found that the lithium-rich compositions in the...area of a piece of transparent acetate film. Constant wavelength...

2009-01-01T23:59:59.000Z

462

Novel -Distonic Radical Cations [CnH2n+2S]+ (n ) 2, 3) Formed upon Decarbonylation of Ionized S-Alkyl Thioformates: A Mass Spectrometric and ab Initio Study  

E-Print Network [OSTI]

ions. Strong evidence for the distonic nature of the fragment ions derived from 2-7·+ has been obtained to intense peaks corresponding to H2S·+ and ionized olefins. Portions of the potential energy surface related explored in the gas phase by a variety of mass spectral methods.2,3 In particular, the -distonic isomer

Nguyen, Minh Tho

463

Optical amplification in disordered electrooptic Tm{sup 3+} and Ho{sup 3+} codoped lanthanum-modified lead zirconate titanate ceramics and study of spectroscopy and communication between cations  

SciTech Connect (OSTI)

Rare earth doped electro-optic (EO) ceramics of lanthanum-modified lead zirconate titanate (PLZT) are promising in building multifunctional optical devices, by taking advantage of both EO effect and optical activity. In this work, the combination of the measured spectra of absorption and photoluminescence, the fluorescent decay, the calculated Judd-Ofelt parameters, and measured single pass gain in Tm{sup 3+}, Ho{sup 3+} codoped PLZT ceramics have marked them out as promising gain media in building electrically controllable lasers/optical amplifiers and other multifunctional devices. Optical energy storage was also observed in the optical amplification dynamics.

Zhao, Hua; Zhang, Kun; Xu, Long; Sun, Fankui; Zhang, Jingwen, E-mail: jingwenz@gmail.com [Department of Physics, Harbin Institute of Technology, Harbin 150001 (China); Chen, Xuesheng [Department of Physics and Astronomy, Wheaton College, Norton Massachusetts 02766 (United States); Li, Kewen K. [Boston Applied Technologies, Inc., Woburn, Massachusetts 01801 (United States)

2014-02-21T23:59:59.000Z

464

Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al.,  

Open Energy Info (EERE)

Hot Springs Area (Shevenell, Et Al., Hot Springs Area (Shevenell, Et Al., 2008) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Spencer Hot Springs Area (Shevenell, Et Al., 2008) Exploration Activity Details Location Spencer Hot Springs Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the geothermal community. Exploration holes at Tungsten Mountain and McGuiness Hills (Spencer Hot Springs?) in 2004 and 2005 encountered hot water and steam at depths of meters with fluid geothermometry indicating reservoir temperatures of 170 to 200oC. More information can be obtained from the Nevada Bureau of Mines and Geology web

465

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) | Open  

Open Energy Info (EERE)

Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Thermal Gradient Holes At Hot Springs Ranch Area (Szybinski, 2006) Exploration Activity Details Location Hot Springs Ranch Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes In 2005, Nevada Geothermal Power Company drilled four geothermal gradient wells, PVTG-1, -2, -3, and -4, and all four encountered geothermal fluids. The holes provided valuable water geochemistry, supporting the geothermometry results obtained from the hot springs and Magma well. The temperature data gathered from all the wells clearly indicates the presence of a major plume of thermal water centered on the Pumpernickel Valley

466

A New Geothermal Resource Map Of Nicaragua | Open Energy Information  

Open Energy Info (EERE)

Map Of Nicaragua Map Of Nicaragua Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: A New Geothermal Resource Map Of Nicaragua Details Activities (0) Areas (0) Regions (0) Abstract: A recently completed Geothermal Master Plan Study of Nicaragua assesses the geothermal resource potential of the identified fields and prospects in the country. During the course of the 18-month study, existing data were compiled and evaluated and new exploration work was conducted to determine, for each of ten geothermal resource areas studied: 1) the current level of knowledge about the resource; 2) its exploration or development status; 3) a conceptual model of the geothermal system or systems (incorporating geology, volcanology, geophysics, hydrology, fluid chemistry and geothermometry); 4) estimated recoverable energy reserves; 5)

467

Category:Geochemical Data Analysis | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Category Edit History Facebook icon Twitter icon » Category:Geochemical Data Analysis Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermalpower.jpg Looking for the Geochemical Data Analysis page? For detailed information on exploration techniques, click here. Category:Geochemical Data Analysis Add.png Add a new Geochemical Data Analysis Technique Pages in category "Geochemical Data Analysis" The following 3 pages are in this category, out of 3 total. G Geothermometry T Thermal Ion Dispersion Thermochronometry Retrieved from "http://en.openei.org/w/index.php?title=Category:Geochemical_Data_Analysis&oldid=689825"

468

Deep Blue No 2- A Resource In The Making At Blue Mountain | Open Energy  

Open Energy Info (EERE)

2- A Resource In The Making At Blue Mountain 2- A Resource In The Making At Blue Mountain Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Deep Blue No 2- A Resource In The Making At Blue Mountain Details Activities (1) Areas (1) Regions (0) Abstract: This paper provides a summary of the drilling operations, flow and injection testing and downhole measurements obtained during the drilling and testing of Deep Blue No.2. This well was sited as a step out to Deep Blue No.1 which measured 145°C at a depth of 645 meters. The maximum temperature recorded in Deep Blue No.2 while drilling was 167.5°C at a depth of 585 meters. Preliminary geothermometry from the short rigon flow test conducted last April 2004 indicated a parent reservoir temperature of 240°C. The results from the November 2004 flow and

469

Investigations of low-temperature geothermal potential in New York State  

SciTech Connect (OSTI)

Temperature gradient map and published heat flow data indicate a possible potential for a geothermal resource in western and central New York State. A new analysis of bottom-hole temperature data for New York State confirms the existence of three positive gradient anomalies: the East Aurora, Cayuga, and Elmira anomalies, with gradients as high as 32/sup 0/C/km, 36/sup 0/C/km, and 36/sup 0/C/km, respectively. Ground waters from two of these anomalies are enriched in silica relative to surrounding areas. Heat flows based on silica geothermometry are 50 to 70 mWm/sup -2/ for the anomalies and 41.4 mWm/sup -2/ for bordering regional flux. A correlation between Bouguer gravity anomalies and the temperature gradient map suggests that the geothermal anomalies may occur above radioactive granites in the basement.

Hodge, D.S.; De Rito, R.; Hifiker, K.; Morgan, P.; Swanberg, C.A.

1981-09-01T23:59:59.000Z

470

Deep Blue No. 2-A Resource in the Making at Blue Mountain | Open Energy  

Open Energy Info (EERE)

Deep Blue No. 2-A Resource in the Making at Blue Mountain Deep Blue No. 2-A Resource in the Making at Blue Mountain Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Deep Blue No. 2-A Resource in the Making at Blue Mountain Abstract This paper provides a summary of the drilling operations, flow and injection testing and downhole measurements obtained during the drilling and testing of Deep Blue No.2. This well was sited as a step out to Deep Blue No.1 which measured 145°C at a depth of 645 meters. The maximum temperature recorded in Deep Blue No.2 while drilling was 167.5°C at a depth of 585 meters. Preliminary geothermometry from the short rigon flow test conducted last April 2004 indicated a parent reservoir temperature of 240°C. The results from the November 2004 flow and injection testing

471

Thermal Gradient Holes At Tungsten Mountain Area (Shevenell, Et Al., 2008)  

Open Energy Info (EERE)

Shevenell, Et Al., 2008) Shevenell, Et Al., 2008) Exploration Activity Details Location Tungsten Mountain Area Exploration Technique Thermal Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the geothermal community. Exploration holes at Tungsten Mountain and McGuiness Hills (Figure 1) in 2004 and 2005 encountered hot water and steam at depths of meters with fluid geothermometry indicating reservoir temperatures of 170 to 200oC. More information can be obtained from the Nevada Bureau of Mines and Geology web site (www.nbmg.unr.edu/geothermal/gtmap.pdf), and from a PowerPoint presentation titled 'Geothermal Exploration Short Stories' posted on the Geothermal Resources Council web site

472

Journal of Catalysis 182, 117128 (1999) Article ID jcat.1998.2312, available online at http://www.idealibrary.com on  

E-Print Network [OSTI]

dehydrogenation and naphthene dehydrogenation steps occur on the Ga cations. They suggested that all other

Iglesia, Enrique

473

Search for Supersymmetry Using Diphoton Events in Proton-Antiproton Collisions at a Center of Mass Energy of 1.96 TeV  

E-Print Network [OSTI]

. Standard Photon Identi cation Variables . . . . . . . . . . 55 B. PMT Spikes . . . . . . . . . . . . . . . . . . . . . . . . . . 61 C. Customized Electron Rejection: Phoenix Tracking . . . . . 67 D. Photon Identi cation Summary.... Standard Photon Identi cation Variables . . . . . . . . . . 55 B. PMT Spikes . . . . . . . . . . . . . . . . . . . . . . . . . . 61 C. Customized Electron Rejection: Phoenix Tracking . . . . . 67 D. Photon Identi cation Summary...

Lee, Eun Sin

2010-07-14T23:59:59.000Z

474

Local coordination of Zn in hydroxy-interlayered minerals and implications for Zn retention in soils  

E-Print Network [OSTI]

(brucitic) island-type structures depending on the composing cations (Dixon and Jackson, 1962; Rich, 1968

475

Transport Equations for Semiconductors Prof. Dr. Ansgar Jungel  

E-Print Network [OSTI]

- cations have been invented; for instance, semiconductor lasers, solar cells, light-emitting diodes (LED

Jüngel, Ansgar

476

Assessment of Potential Aquatic Herbicide Impacts to California Aquatic Ecosystems  

E-Print Network [OSTI]

association with herbicide appli- cations. Applications of acrolein, copper sulfate, chelated copper, diquat

477

Isotopic Analysis-Fluid At Raft River Geothermal Area (1977) | Open Energy  

Open Energy Info (EERE)

Isotopic Analysis-Fluid At Raft River Geothermal Area (1977) Isotopic Analysis-Fluid At Raft River Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis-Fluid At Raft River Geothermal Area (1977) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Isotopic Analysis- Fluid Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Estimate deep reservoir temperature Notes The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested. Methods are described to calculate the effects of boiling and dilution. The geothermometer, is applied to thermal systems of Yellowstone Park, Wyoming, Long Valley, California, and Raft River, Idaho to estimate deep reservoir temperatures

478

Geothermal reservoir temperatures estimated from the oxygen isotope  

Open Energy Info (EERE)

reservoir temperatures estimated from the oxygen isotope reservoir temperatures estimated from the oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Geothermal reservoir temperatures estimated from the oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes Details Activities (3) Areas (3) Regions (0) Abstract: The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested as a geothermometer in three areas of the western United States. Limited analyses of spring and borehole fluids and existing experimental rate studies suggest that dissolved sulfate and water are probably in isotopic equilibrium in all reservoirs of significant size with temperatures above

479

Compound and Elemental Analysis At Central Nevada Seismic Zone Region  

Open Energy Info (EERE)

Compound and Elemental Analysis At Central Nevada Compound and Elemental Analysis At Central Nevada Seismic Zone Region (Laney, 2005) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in

480

Water Sampling At Northern Basin & Range Region (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Water Sampling At Northern Basin & Range Region Water Sampling At Northern Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Water Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

Note: This page contains sample records for the topic "geothermometry cation geothermometers" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Exploration Of The Upper Hot Creek Ranch Geothermal Resource, Nye County,  

Open Energy Info (EERE)

Of The Upper Hot Creek Ranch Geothermal Resource, Nye County, Of The Upper Hot Creek Ranch Geothermal Resource, Nye County, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Exploration Of The Upper Hot Creek Ranch Geothermal Resource, Nye County, Nevada Details Activities (2) Areas (1) Regions (0) Abstract: The Upper Hot Creek Ranch (UHCR) geothermal system had seen no significant exploration activity prior to initiation of this GRED III project. Geochemical geothermometers calculated from previously available but questionable quality analyses of the UHCR hot spring waters indicated possible subsurface temperatures of +320 oF. A complex Quaternary and Holocene faulting pattern associated with a six mile step over of the Hot Creek Range near the UHCR also indicated that this area was worthy of some

482

Isotopic Analysis At Nw Basin & Range Region (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Isotopic Analysis At Nw Basin & Range Region (Laney, 2005) Isotopic Analysis At Nw Basin & Range Region (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Fluid At Nw Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Isotopic Analysis- Fluid Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of

483

Origin And Characterization Of Geothermal Waters At Desert Queen, Nevada |  

Open Energy Info (EERE)

Origin And Characterization Of Geothermal Waters At Desert Queen, Nevada Origin And Characterization Of Geothermal Waters At Desert Queen, Nevada Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Origin And Characterization Of Geothermal Waters At Desert Queen, Nevada Details Activities (1) Areas (1) Regions (0) Abstract: The Desert Queen geothermal system, which is in close proximity to two locations where geothermal energy is currently being harnessed, may host an additional reservoir. A _18O vs _D plot indicates that Desert Queen waters likely originate from the Humboldt River, and reflects Humboldt River water that is clearly evaporated. Temperatures of the reservoir at depth are estimated to be between 92-141°C and were calculated using the _18O(SO4-H2O) geothermometer. It is unclear whether these temperatures

484

Compound and Elemental Analysis At Buffalo Valley Hot Springs Area (Laney,  

Open Energy Info (EERE)

Compound and Elemental Analysis At Buffalo Valley Hot Compound and Elemental Analysis At Buffalo Valley Hot Springs Area (Laney, 2005) Exploration Activity Details Location Buffalo Valley Hot Springs Area Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in

485

Compound and Elemental Analysis At Northern Basin & Range Region (Laney,  

Open Energy Info (EERE)

Laney, Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Compound and Elemental Analysis At Northern Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being

486

Hydrothermal Heat Discharge In The Cascade Range, Northwestern United  

Open Energy Info (EERE)

Page Page Edit History Facebook icon Twitter icon » Hydrothermal Heat Discharge In The Cascade Range, Northwestern United States Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Hydrothermal Heat Discharge In The Cascade Range, Northwestern United States Details Activities (3) Areas (1) Regions (0) Abstract: Hydrothermal heat discharge in the Cascade Range includes the heat discharged by thermal springs, by "slightly thermal" springs that are only a few degrees warmer than ambient temperature, and by fumaroles. Thermal-spring heat discharge is calculated on the basis of chloride-flux measurements and geothermometer temperatures and totals ~ 240 MW in the U.S. part of the Cascade Range, excluding the transient post-1980 discharge

487

Isotopic Analysis At Walker-Lane Transitional Zone Region (Laney, 2005) |  

Open Energy Info (EERE)

Isotopic Analysis- Fluid At Walker-Lane Transitional Isotopic Analysis- Fluid At Walker-Lane Transitional Zone Region (Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Isotopic Analysis- Fluid Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in

488

Isotopic Analysis At Central Nevada Seismic Zone Region (Laney, 2005) |  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis- Fluid At Central Nevada Seismic Zone Region (Laney, 2005) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Isotopic Analysis- Fluid Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being

489

Compound and Elemental Analysis At Nw Basin & Range Region (Laney, 2005) |  

Open Energy Info (EERE)

Nw Basin & Range Nw Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northwest Basin and Range Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

490

Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A  

Open Energy Info (EERE)

Waters Along The Konocti Bay Fault Zone, Lake County, California- A Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Thermal Waters Along The Konocti Bay Fault Zone, Lake County, California- A Re-Evaluation Details Activities (3) Areas (1) Regions (0) Abstract: The Konocti Bay fault zone (KBFZ), initially regarded by some as a promising target for liquid-dominated geothermal systems, has been a disappointment. At least five exploratory wells were drilled in the vicinity of the KBFZ, but none were successful. Although the Na-K-Ca and Na-Li geothermometers indicate that the thermal waters discharging in the vicinity of Howard and Seigler Springs may have equilibrated at temperatures greater than 200°C, the spring temperatures and fluid

491

Isotopic Analysis At Northern Basin & Range Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Isotopic Analysis- Fluid At Northern Basin & Range Isotopic Analysis- Fluid At Northern Basin & Range Region (Laney, 2005) Exploration Activity Details Location Northern Basin and Range Geothermal Region Exploration Technique Isotopic Analysis- Fluid Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in

492

Water Sampling At Central Nevada Seismic Zone Region (Laney, 2005) | Open  

Open Energy Info (EERE)

Central Nevada Seismic Zone Region Central Nevada Seismic Zone Region (Laney, 2005) Exploration Activity Details Location Central Nevada Seismic Zone Geothermal Region Exploration Technique Water Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

493

Water Sampling At Teels Marsh Area (Coolbaugh, Et Al., 2006) | Open Energy  

Open Energy Info (EERE)

Teels Marsh Area (Coolbaugh, Et Al., 2006) Teels Marsh Area (Coolbaugh, Et Al., 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Teels Marsh Area (Coolbaugh, Et Al., 2006) Exploration Activity Details Location Teels Marsh Area Exploration Technique Water Sampling Activity Date Usefulness useful DOE-funding Unknown Notes Follow up (to ASTER satellite imaging) analysis of spring and well waters yielded geothermometer reservoir estimates up to 192°C References Mark F. Coolbaugh, Chris Kraft, Chris Sladek, Richard E. Zehner, Lisa Shevenell (2006) Quaternary Borate Deposits As A Geothermal Exploration Tool In The Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Water_Sampling_At_Teels_Marsh_Area_(Coolbaugh,_Et_Al.,_2006)&oldid=388168

494

Isotopic Analysis-Fluid At Yellowstone Caldera Geothermal Region (1977) |  

Open Energy Info (EERE)

Isotopic Analysis-Fluid At Yellowstone Caldera Geothermal Region (1977) Isotopic Analysis-Fluid At Yellowstone Caldera Geothermal Region (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis-Fluid At Yellowstone Caldera Geothermal Region (1977) Exploration Activity Details Location Yellowstone Caldera Geothermal Region Exploration Technique Isotopic Analysis-Fluid Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Estimate deep reservoir temperature Notes The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested. Methods are described to calculate the effects of boiling and dilution. The geothermometer, is applied to thermal systems of Yellowstone Park, Wyoming, Long Valley, California, and Raft River, Idaho to estimate deep reservoir temperatures

495

Compound and Elemental Analysis At Walker-Lane Transitional Zone Region  

Open Energy Info (EERE)

Laney, 2005) Laney, 2005) Exploration Activity Details Location Walker-Lane Transition Zone Geothermal Region Exploration Technique Compound and Elemental Analysis Activity Date Usefulness not indicated DOE-funding Unknown Notes Geochemical Sampling of Thermal and Non-thermal Waters in Nevada, Shevenell and Garside. The objective of this project is to obtain geochemical data from springs (and some wells) for which data are not publicly available, or for which the analyses are incomplete, poor, or nonexistent. With these data, geothermometers are being calculated and a preliminary assessment of the geothermal potential and ranking of the sampled areas is being conducted using the new geochemical data. Objectives changed slightly in 2004. Samples are now being collected at sites identified by other

496

Isotopic Analysis-Fluid At Long Valley Caldera Geothermal Area (1977) |  

Open Energy Info (EERE)

Fluid At Long Valley Caldera Geothermal Area (1977) Fluid At Long Valley Caldera Geothermal Area (1977) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Isotopic Analysis-Fluid At Long Valley Caldera Geothermal Area (1977) Exploration Activity Details Location Long Valley Caldera Geothermal Area Exploration Technique Isotopic Analysis-Fluid Activity Date 1977 Usefulness not indicated DOE-funding Unknown Exploration Basis Estimate deep reservoir temperature Notes The oxygen isotope compositions of dissolved sulfate and water from hot springs and shallow drillholes have been tested. Methods are described to calculate the effects of boiling and dilution. The geothermometer, is applied to thermal systems of Yellowstone Park, Wyoming, Long Valley, California, and Raft River, Idaho to estimate deep reservoir temperatures

497

Geochemistry of the Wendel-Amedee Geothermal System-California | Open  

Open Energy Info (EERE)

Geochemistry of the Wendel-Amedee Geothermal System-California Geochemistry of the Wendel-Amedee Geothermal System-California Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Geochemistry of the Wendel-Amedee Geothermal System-California Abstract The fluid chemistry of the geothermal system that feed Amedee and Wendel Hot Springs in eastern California is complex. Two thermal fluids have been identified based on the concentrations of the conservative elements C1 and B, fluid enthalpies, and the application of chemical geothermometers. One is characterized by temperatures above 120°C and a TDS content of 1300 ppm, and will be used by GeoProducts Corporation to produce electricity. The second did lower in temperature, 75°C, and has a TDS content of 650 ppm. This fluid may be used fore direct heat application at the Susanville

498

Water Sampling At Rhodes Marsh Area (Coolbaugh, Et Al., 2006) | Open Energy  

Open Energy Info (EERE)

Rhodes Marsh Area (Coolbaugh, Et Al., 2006) Rhodes Marsh Area (Coolbaugh, Et Al., 2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Water Sampling At Rhodes Marsh Area (Coolbaugh, Et Al., 2006) Exploration Activity Details Location Rhodes Marsh Area Exploration Technique Water Sampling Activity Date Usefulness useful DOE-funding Unknown Notes Follow up (to ASTER satellite imaging) analysis of spring and well waters yielded geothermometer reservoir estimates up to 162°C References Mark F. Coolbaugh, Chris Kraft, Chris Sladek, Richard E. Zehner, Lisa Shevenell (2006) Quaternary Borate Deposits As A Geothermal Exploration Tool In The Great Basin Retrieved from "http://en.openei.org/w/index.php?title=Water_Sampling_At_Rhodes_Marsh_Area_(Coolbaugh,_Et_Al.,_2006)&oldid=387552"

499

Lithium In Tufas Of The Great Basin- Exploration Implications For  

Open Energy Info (EERE)

In Tufas Of The Great Basin- Exploration Implications For In Tufas Of The Great Basin- Exploration Implications For Geothermal Energy And Lithium Resources Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Lithium In Tufas Of The Great Basin- Exploration Implications For Geothermal Energy And Lithium Resources Details Activities (8) Areas (4) Regions (0) Abstract: Lithium/magnesium, lithium/sodium, and to a lesser extent, potassium/magnesium ratios in calcium carbonate tufa columns provide a fingerprint for distinguishing tufa columns formed from thermal spring waters versus those formed from non-thermal spring waters. These ratios form the basis of the Mg/Li, Na/Li, and K/Mg fluid geothermometers commonly used in geothermal exploration, which are based on the fact that at elevated temperatures, due to mineral-fluid equilibria, lithium

500

An evaluation of the geothermal potential of the Tecuamburro Volcano area of Guatemala  

SciTech Connect (OSTI)

Radiometric ages indicate that the Tecuamburro Volcano and three adjacent lava domes grew during the last 38,300 years, and that a 360-m-wide phreatic crater, Laguna Ixpaco, was formed near the base of these domes about 2900 years ago. Laguna Ixpaco is located within the Chupadero crater, from which pyroxene pumice deposits were erupted 38,300 years ago. Thus, the likelihood is great for a partly molten or solid-but-still-hot near-surface intrusion beneath the area. Fumaroles and hot springs issue locally from the Tecuamburro volcanic complex and near Laguna Ixpaco. Analyses of gas and fluid samples from these and other nearby thermal manifestations yield chemical-geothermometer temperatures of about 150{degree} to 300{degree}C, with the highest temperatures at Ixpaco. The existence of a commercial-grade geothermal reservoir beneath the Ixpaco area seems likely. 84 refs., 70 figs., 12 tabs.

Heiken, G.; Duffield, W. (eds.)

1990-09-01T23:59:59.000Z