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1

New methods and materials for solid phase extraction and high performance liquid chromatography  

SciTech Connect (OSTI)

This paper describes methods for solid phase extraction and high performance liquid chromatography (HPLC). The following are described: Effects of Resin Sulfonation on the Retention of Polar Organic Compounds in Solid Phase Extraction; Ion-Chromatographic Separation of Alkali Metals In Non-Aqueous Solvents; Cation-Exchange Chromatography in Non-Aqueous Solvents; and Silicalite As a Stationary Phase For HPLC.

Dumont, P.J.

1996-04-23T23:59:59.000Z

2

High Pressure Liquid Chromatography of Fatty Acids and Lipids  

Science Journals Connector (OSTI)

......column; am- bient temperature; 395-400 psig...acetone; column temperature, 45 . (Reprinted...reasonable to speculate that development of new deriva- tives...exciting area for future developments in HPLC is liquid chromatography...3.1.1.4) of snake venom. The resulting......

M. J. Cooper; M. W. Anders

1975-09-01T23:59:59.000Z

3

Determination of 5-Hydroxymethylfurfural Using Derivatization Combined with Polymer Monolith Microextraction by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

Determination of 5-Hydroxymethylfurfural Using Derivatization Combined with Polymer Monolith Microextraction by High-Performance Liquid Chromatography ... A simple and sensitive method for the determination of 5-hydroxymethylfurfural (HMF) in coffee, honey, beer, Coke, and urine by high-performance liquid chromatography (HPLC) is presented. ... Polymer monolith microextraction; high-performance liquid chromatography; 5-hydroxymethylfurfural; 2,4-dinitrophenylhydrazine ...

Jian-Yuan Wu; Zhi-Guo Shi; Yu-Qi Feng

2009-04-27T23:59:59.000Z

4

Analysis of Isocyanates by Gas Liquid Chromatography  

Science Journals Connector (OSTI)

......Liquid Chromatography Gary W. Ruth Marathon Oil Company, Denver Research Center...Chromatography by Gary W. Ruth, Marathon Oil Company, Denver Research Center...at the Denver Research Center, Marathon Oil Company, Littleton, Colorado......

Gary W. Ruth

1968-10-01T23:59:59.000Z

5

Rapid analysis of cyanuric acid in swimming pool waters by high performance liquid chromatography using porous graphitic carbon  

Science Journals Connector (OSTI)

An approach is presented for reducing analysis times of cyanuric acid in swimming pool waters by high performance liquid chromatography (HPLC ... ) to fully resolve cyanuric acid from other pool interferences wit...

R. Cantú; O. Evans; M. L. Magnuson

2001-04-01T23:59:59.000Z

6

Laboratory solvent reuse -- Liquid chromatography  

SciTech Connect (OSTI)

The objective of this work was to develop a method for reduction of waste solvent in the Process Engineering Chemistry Laboratory. The liquid chromatographs are the largest generators of explosive-contaminated waste in the laboratory. We developed a successful process for the reuse of solvents from the liquid chromatographs and demonstrated the utility of the process in the assay of hexanitrostilbene.

Quinlin, W.T.; Schaffer, C.L.

1992-11-01T23:59:59.000Z

7

Polarity Programmed Gas-Liquid Chromatography  

Science Journals Connector (OSTI)

......component on the carrier gas, is investigated...component of the carrier gas. Introduction One...strength, i.e., the solubility of the solute in...temperature programming in gas-liquid chromatography...of carrier gas for nitrogen, helium, methane...of other solutes. Water vapor or steam are......

Jon F. Parcher; Theodore N. Westlake

1976-07-01T23:59:59.000Z

8

Combining Laser Ablation/Liquid Phase Collection Surface Sampling and High-Performance Liquid Chromatography Electrospray Ionization Mass Spectrometry  

SciTech Connect (OSTI)

This paper describes the coupling of ambient pressure transmission geometry laser ablation with a liquid phase sample collection method for surface sampling and ionization with subsequent mass spectral analysis. A commercially available autosampler was adapted to produce a liquid droplet at the end of the syringe injection needle while in close proximity to the surface to collect the sample plume produced by laser ablation. The sample collection was followed by either flow injection or a high performance liquid chromatography (HPLC) separation of the extracted components and detection with electrospray ionization mass spectrometry (ESI-MS). To illustrate the analytical utility of this coupling, thin films of a commercial ink sample containing rhodamine 6G and of mixed isobaric rhodamine B and 6G dyes on glass microscope slides were analyzed. The flow injection and HPLC/ESI-MS analysis revealed successful laser ablation, capture and, with HPLC, the separation of the two compounds. The ablated circular area was about 70 m in diameter for these experiments. The spatial sampling resolution afforded by the laser ablation, as well as the ability to use sample processing methods like HPLC between the sample collection and ionization steps, makes this combined surface sampling/ionization technique a highly versatile analytical tool.

Ovchinnikova, Olga S [ORNL; Kertesz, Vilmos [ORNL; Van Berkel, Gary J [ORNL

2011-01-01T23:59:59.000Z

9

Liquid Chromatography—Past and Future  

Science Journals Connector (OSTI)

......Apparently, he did not like life in Russia very much and had...1906). 4. Purneli, H., "Gas Chromatography," Wiley, New...automa- tion. I will devote the remaining space to some con- 15. Palmer...mounted on the spindle of an air turbine and was spinning inside a Teflon-covered......

Erich Heftmann

1973-06-01T23:59:59.000Z

10

Column Design in High Pressure Liquid Chromatography  

Science Journals Connector (OSTI)

......consideration, and the high inlet pressure is the price to be paid for the short analysis time...silicious support impregnated with paraffin oil in reversed phase chromatography. As op...in the above described manner following heating of the product at 450 C. With relatively......

Csaba Horvath; S. R. Lipsky

1969-02-01T23:59:59.000Z

11

Column Design in High Pressure Liquid Chromatography  

Science Journals Connector (OSTI)

......School of Medicine, New Haven, Connecticut Presented at the Fit th International...high inlet pressure is the price to be paid for the short analysis...support impregnated with paraffin oil in reversed phase chromatography...described manner following heating of the product at 450 C. With......

Csaba Horvath; S. R. Lipsky

1969-02-01T23:59:59.000Z

12

Liquid Chromatography—Past and Future  

Science Journals Connector (OSTI)

......method. While much progress has been made in...Reed, published a report on the separation...11), and by his reports read before the First...Purneli, H., "Gas Chromatography...force behind the progress in chro- matography...spindle of an air turbine and was spinning......

Erich Heftmann

1973-06-01T23:59:59.000Z

13

A Quantitative Method for the Determination of Cyclopropenoid Fatty Acids in Cottonseed, Cottonseed Meal, and Cottonseed Oil (Gossypium hirsutum) by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, and Covance Laboratories Inc., 3301 Kinsman Boulevard, Madison, Wisconsin 53704 ... There are methods for determining the total CPFA content in oils (9) and methods that provide levels of specific CPFAs based on gas chromatography of methyl esters (10), parallel gas?liquid chromatography/high-performance liquid chromatography (HPLC) methodology (11), or HPLC following phenacyl derivatization (12). ... Crude cottonseed oil, refined cottonseed oil, and a mixt. of corn oil and Sterculia foetida seed oil caused deposition of increased levels of stearic acid in eggs laid by hens fed the oils, but these oils, heated at temps of 100-250° for 1-4 hrs. ...

Janet C. Obert; Donald Hughes; Wendy R. Sorenson; Melinda McCann; William P. Ridley

2007-02-27T23:59:59.000Z

14

Application of Ionic Liquids in Liquid Chromatography and Electrodriven Separation  

Science Journals Connector (OSTI)

......processing (5), solvent extraction (6, 7), electrolytes in batteries (8), metal deposition (9, 10) and gas treatment (11...Polymerized ionic liquid sorbents for CO2 separation. Energy and Fuels (2010) 24:5797-5804. 13 Ho T.D. , Canestraro A......

Yi Huang; Shun Yao; Hang Song

2013-08-01T23:59:59.000Z

15

An Analysis of the Wood Sugar Assay Using HPLC: A Comparison with Paper Chromatography  

Science Journals Connector (OSTI)

......and M. Desrochers. Simplified analysis of wood sugars. Tappi 65(7): 103-06 (1982). 3. J.F.. Saeman, W.E...of pulp constituents by quantitative paper chromatography. Tappi 37(8): 336-43 (1954). 4. W.J. Youden. Statistical......

Roger C. Pettersen; Virgil H. Schwandt; Marilyn J. Effland

1984-11-01T23:59:59.000Z

16

Towards Chip Scale Liquid Chromatography and High Throughput Immunosensing  

SciTech Connect (OSTI)

This work describes several research projects aimed towards developing new instruments and novel methods for high throughput chemical and biological analysis. Approaches are taken in two directions. The first direction takes advantage of well-established semiconductor fabrication techniques and applies them to miniaturize instruments that are workhorses in analytical laboratories. Specifically, the first part of this work focused on the development of micropumps and microvalves for controlled fluid delivery. The mechanism of these micropumps and microvalves relies on the electrochemically-induced surface tension change at a mercury/electrolyte interface. A miniaturized flow injection analysis device was integrated and flow injection analyses were demonstrated. In the second part of this work, microfluidic chips were also designed, fabricated, and tested. Separations of two fluorescent dyes were demonstrated in microfabricated channels, based on an open-tubular liquid chromatography (OT LC) or an electrochemically-modulated liquid chromatography (EMLC) format. A reduction in instrument size can potentially increase analysis speed, and allow exceedingly small amounts of sample to be analyzed under diverse separation conditions. The second direction explores the surface enhanced Raman spectroscopy (SERS) as a signal transduction method for immunoassay analysis. It takes advantage of the improved detection sensitivity as a result of surface enhancement on colloidal gold, the narrow width of Raman band, and the stability of Raman scattering signals to distinguish several different species simultaneously without exploiting spatially-separated addresses on a biochip. By labeling gold nanoparticles with different Raman reporters in conjunction with different detection antibodies, a simultaneous detection of a dual-analyte immunoassay was demonstrated. Using this scheme for quantitative analysis was also studied and preliminary dose-response curves from an immunoassay of a mo del antigen were obtained. Simultaneous detection of several analytes at the same address can potentially increase the analysis speed, and can further expand the analysis capability of a microarray chip.

Ni, J.

2000-09-21T23:59:59.000Z

17

Graphite Furnance Atomic Absorption as a detector for High Performance Liquid Chromatography  

E-Print Network [OSTI]

GRAPHITE FURNACE ATOMIC ABSORPTION AS A DETECTOR FOR HIGH PERFORMANCE LIQUID CHROMATOGRAPHy A Thesis by HUSTON EDWARD HOWELL, JR. Submitted to the Graduate College oi' Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1980 Major Subject: Chemistry GRAPHITE FURNACE ATOMIC ABSORPTION AS A DETECTOR FOR HIGH PERFORMANCE LIQUID CHROMATOGRAPHY A Thesis by HUSTON EDWARD HOWELL, JR. Approved as to style and content by: (Chairman...

Howell, Huston Edward

1980-01-01T23:59:59.000Z

18

Liquid Microjunction Surface Sampling Coupled with High-Pressure Liquid Chromatography-Electrospray Ionization-Mass Spectrometry for Analysis of Drugs and Metabolites in Whole-Body Thin Tissue Sections  

SciTech Connect (OSTI)

In this work, a commercially available autosampler was adapted to perform direct liquid microjunction (LMJ) surface sampling followed by a high-pressure liquid chromatography (HPLC) separation of the extract components and detection with electrospray ionization mass spectrometry (ESI-MS). To illustrate the utility of coupling a separation with this direct liquid extraction based surface sampling approach, four different organs (brain, lung, kidney, and liver) from whole-body thin tissue sections of propranolol dosed and control mice were examined. The parent drug was observed in the chromatograms of the surface sampling extracts from all the organs of the dosed mouse examined. In addition, two isomeric phase II metabolites of propranolol (an aliphatic and an aromatic hydroxypropranolol glucuronide) were observed in the chromatograms of the extracts from lung, kidney, and liver. Confirming the presence of one or the other or both of these glucuronides in the extract from the various organs was not possible without the separation. These drug and metabolite data obtained using the LMJ surface sampling/HPLC-MS method and the results achieved by analyzing similar samples by conventional extraction of the tissues and subsequent HPLC-MS analysis were consistent.

Kertesz, Vilmos [ORNL; Van Berkel, Gary J [ORNL

2010-01-01T23:59:59.000Z

19

Review of Liquid Phases in Gas Chromatography, Part II: Applications  

Science Journals Connector (OSTI)

......in the carrier gas; this sharpens...oxygen) and water (20,22,23...in the carrier gas, from leaks in...tochromic (12) and solubility parameter (36...Eon. Expanded solubility param eter treatment...for capillary gas chromatography...capillaries and a nitrogen selective detector......

J.A. Yancey

1994-09-01T23:59:59.000Z

20

Determination of triclosan and triclocarban in environmental water samples with ionic liquid/ionic liquid dispersive liquid-liquid microextraction prior to HPLC-ESI-MS/MS  

Science Journals Connector (OSTI)

A hydrophobic ionic liquid was finely dispersed in aqueous solution along with a hydrophilic ionic liquid. Following centrifugation, the two phases aggregate to form relatively large droplets. Based on this pheno...

Ru-Song Zhao; Xia Wang; Jing Sun; Cong Hu; Xi-Kui Wang

2011-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

An Enantiomer-Selective Liquid Chromatography-Tandem Mass Spectrometry Method for Methadone and EDDP Validated for Use in Human Plasma, Urine, and Liver Microsomes  

Science Journals Connector (OSTI)

......of Obstetrics and Gynecology, University of Texas Medical Branch, Galveston, Texas 77555 A liquid chromatography-electrospray...Gynecology,Universityof TexasMedical Branch,Galveston,Texas77555 Abstract I A liquid chromatography-electrospray......

David E. Moody; Shen-Nan Lin; Yan Chang; Lolita Lamm; Mark K. Greenwald; Mahmoud S. Ahmed

2008-04-01T23:59:59.000Z

22

Position sensitive radioactivity detection for gas and liquid chromatography  

DOE Patents [OSTI]

A method and apparatus are provided for the position sensitive detection of radioactivity in a fluid stream, particularly in the effluent fluid stream from a gas or liquid chromatographic instrument. The invention represents a significant advance in efficiency and cost reduction compared with current efforts.

Cochran, Joseph L. (Knoxville, TN); McCarthy, John F. (Loudon, TN); Palumbo, Anthony V. (Oak Ridge, TN); Phelps, Tommy J. (Knoxville, TN)

2001-01-01T23:59:59.000Z

23

A high selective and sensitive liquid chromatography–tandem mass spectrometry method for quantization of BPA urinary levels in children  

Science Journals Connector (OSTI)

A selective and highly sensitive liquid chromatography–tandem mass spectrometry method has been developed and validated for determination of Bisphenol A (BPA) in human urine using labeled d6-BPA as internal stand...

Carla Nicolucci; Sergio Rossi; Ciro Menale…

2013-11-01T23:59:59.000Z

24

Exploring Liquid Sequential Injection Chromatography To Teach Fundamentals of Separation Methods: A Very Fast Analytical Chemistry Experiment  

Science Journals Connector (OSTI)

Exploring Liquid Sequential Injection Chromatography To Teach Fundamentals of Separation Methods: A Very Fast Analytical Chemistry Experiment ... Design of experiments (DOE) was used to find the suitable condition for optimal separation in short chromatographic runs. ...

Jose? C. Penteado; Jorge Ce?sar Masini

2010-12-09T23:59:59.000Z

25

Continuous Flow Liquid Microjunction Surface Sampling Probe Connected On-line with HPLC/MS for Spatially Resolved Analysis of Small Molecules and Proteins  

SciTech Connect (OSTI)

RATIONALE: A continuous flow liquid microjunction surface sampling probe extracts soluble material from surfaces for direct ionization and detection by MS. Demonstrated here is the on-line coupling of such a probe with HPLC/MS enabling extraction, separation and detection of small molecules and proteins from surfaces in a spatially resolved (~0.5 mm diameter spots) manner. Methods: A continuous flow liquid microjunction surface sampling probe was connected to a 6-port, 2-position valve for extract collection and injection to an HPLC column. A QTRAP 5500 hybrid triple quadrupole linear ion trap equipped with a Turbo V ion source operated in positive ESI mode was used for all experiments. System operation was tested with extraction, separation and detection of propranolol and associated metabolites from drug dosed tissues and proteins from dried sheep blood spots on paper. Results: Confirmed in the tissue were the parent drug and two different hydroxypropranolol glucuronides. The mass spectrometric response for these compounds from different locations in the liver showed an increase with increasing extraction time (5, 20 and 40 s extractions). For on-line separation and detection/identification of extracted proteins from dried sheep blood spots, two major protein peaks dominated the chromatogram and could be correlated with the expected masses for the hemoglobin and chains. Conclusions: Spatially resolved sampling, separation, and detection of small molecules and proteins from surfaces can be accomplished using a continuous flow liquid microjunction surface sampling probe coupled on-line with HPLC/MS detection.

Van Berkel, Gary J [ORNL; Kertesz, Vilmos [ORNL

2013-01-01T23:59:59.000Z

26

Improving liquid chromatography-mass spectrometry sensitivity using a subambient pressure ionization with nanoelectrospray (SPIN) interface  

SciTech Connect (OSTI)

In this work the Subambient Pressure Ionization with Nanoelectrospray (SPIN) ion source and interface which operates at ~15-30 Torr is demonstrated to be compatible with gradient reversed-phase liquid chromatography-MS applications, exemplified here with the analysis of complex samples (a protein tryptic digest and a whole cell lysate). A low liquid chromatographic flow rate (100-400 nL/min) allowed stable electrospray to be established while avoiding electrical breakdown. Efforts to increase the operating pressure of the SPIN source relative to previously reported designs prevented solvent freezing and enhanced charged cluster/droplet desolvation. A 5-12-fold improvement in sensitivity relative to a conventional atmospheric pressure nanoelectrospray ionization (ESI) source was obtained for detected peptides.

Tang, Keqi; Page, Jason S.; Marginean, Ioan; Kelly, Ryan T.; Smith, Richard D.

2011-04-22T23:59:59.000Z

27

A Validated Liquid Chromatography-Atmospheric Pressure Chemical Ionization-Tandem Mass Spectrometry Method for Quantitation of Cocaine and Benzoylecgonine in Human Plasma  

Science Journals Connector (OSTI)

......Chromatography-Atmospheric Pressure Chemical...Benzoylecgonine in Human Plasma Shen-Nan Lin 1...chromatography-atmospheric pressure chemical...benzoylecgonine in human plasma. | In order to...ValidatedLiquidChromatography-Atmospheric PressureChemicalIonization...benzoylecgonine in human plasma.Cocaine-dsand......

Shen-Nan Lin; David E. Moody; George E. Bigelow; Rodger L. Foltz

2001-10-01T23:59:59.000Z

28

Improved resins and novel materials and methods for solid phase extraction and high performance liquid chromatography  

SciTech Connect (OSTI)

Solid-phase extraction (SPE) has grown to be one of the most widely used methods for isolation and preconcentration of a vast range of compounds from aqueous solutions. By modifying polymeric SPE resins with chelating functional groups, the selective uptake of metals was accomplished. The resin, along with adsorbed metals, was vaporized in the ICP and detection of the metals was then possible using either mass or emission spectroscopy. Drug analyses in biological fluids have received heightened attention as drug testing is on the increase both in sports and in the work environment. By using a direct-injection technique, biological fluids can be injected directly into the liquid chromatographic system with no pretreatment. A new surfactant, a sulfonated form of Brij-30 (Brij-S) is shown to prevent the uptake of serum proteins on commercial HPLC columns by forming a thin coating on the silica C18 surface. Excellent separations of eight or more drugs with a wide range of retention times were obtained. The separations had sharper peaks and lower retention times than similar separations performed with the surfactant sodium dodecylsulfate (SDS). Quantitative recovery of a number of drugs with limits of detection near 1 ppm with a 5 {micro}l injection volume were obtained. Finally, a method for solid-phase extraction in a syringe is introduced. The system greatly reduced the volume of solvent required to elute adsorbed analytes from the SPE bed while providing a semi-automated setup. SPE in a syringe consists of a very small bed of resin-loaded membrane packed into a GC or HPLC syringe. After extraction, elution was performed with just a few {micro}l of solvent. This small elution volume allowed injection of the eluent directly from the syringe into the chromatographic system, eliminating the handling problems associated with such small volumes.

Freeze, R.

1997-10-08T23:59:59.000Z

29

Purification of fire derived markers for lg scale isotope analysis C) using high performance liquid chromatography (HPLC)  

E-Print Network [OSTI]

Purification of fire derived markers for lg scale isotope analysis (d13 C, D14 C) using high successfully analyzed the 14 C content of individual benzene polycarboxy- lic acids with a sample size as small the expansion of isotopic BC studies to samples that have either been too small or strongly affected by non

Gilli, Adrian

30

Determination of polynuclear aromatic hydrocarbons in seafood by liquid chromatography with fluorescence detection  

SciTech Connect (OSTI)

Modification of a previously published method for determination of polynuclear aromatic hydrocarbons (PAHs) produces very clean seafood extracts in less than half the time. After alkaline digestion of the seafood, PAHs were partitioned into 1,2,3-trichlorotrifluoroethane. The resulting extract was cleaned up by solid-phase extraction on alumina, silica, and C{sub 18} adsorbents and then analyzed by gradient reversed-phase liquid chromatography with programmable fluorescence detection. Average recoveries of 12 PAHs [acenaphthene, anthracene, fluoranthene, pyrene, benz(a)anthracene, chrysene, benzo(b)fluoranthene, benzo(k)-fluoranthene, benzo(k)-fluoranthene, benzo(a)pyrene, dibenz(a,h)anthracene, benzo(ghi)perylene, and indeno(1,2,3-cd)pyrene] from 5 different matrixes (mussels, oysters, clams, crabmeat, and salmon)spiked at low parts-per-billion levels ranged from 76 to 94%. Estimated limits of quantitation ranged from 0.01 to 0.6 ppb PAHs in extracts that were free of matrix interferences. Results of analyses of a mussels standard reference material obtained from the National Institute of Standards and Technology were in good agreement with the certified values. 16 refs., 3 figs., 4 tabs.

Perfetti, G.A.; Nyman, P.J.; Fisher, S.; Joe, F.L. Jr.; Diachenko, G.W. [Food and Drug Administration, Washington, DC (United States)

1992-09-01T23:59:59.000Z

31

Refractive index and absorption detector for liquid chromatography based on Fabry-Perot interferometry  

DOE Patents [OSTI]

A refractive index and absorption detector are disclosed for liquid chromatography. It is based in part on a Fabry-Perot interferometer and is used for the improved detection of refractive index and absorption. It includes a Fabry-Perot interferometer having a normally fixed first partially reflecting mirror and a movable second partially reflecting mirror. A chromatographic flow-cell is positioned between the mirrors along the optical axis of a monochromatic laser beam passing through the interferometer. A means for deriving information about the interference fringes coming out of the interferometer is used with a mini-computer to compute the refractive index of the specimen injected into the flow cell. The minicomputer continuously scans the interferometer for continuous refractive index readings and outputs the continuous results of the scans on a chart recorder. The absorption of the specimen can concurrently be scanned by including a second optical path for an excitation laser which will not interfere with the first laser, but will affect the specimen so that absorption properties can be detected. By first scanning for the refractive index of the specimen, and then immediately adding the excitation laser and subsequently scanning for the refractive index again, the absorption of the specimen can be computed and recorded. 10 figs.

Yeung, E.S.; Woodruff, S.D.

1984-06-19T23:59:59.000Z

32

The Use of Stable Isotope Labeling and Liquid Chromatography—Tandem Mass Spectrometry Techniques To Simultaneously Determine the Oral and Ophthalmic Bioavailability of Timolol in Dogs  

Science Journals Connector (OSTI)

......liquid chromatography with atmospheric-pressure chemical-ionization...Phillipsburg, NJ). Water (deionized) was generated using a Barnstead generator (Dubuque, IA). Dosing...solution of its maleate salt in water at a concentration of 0......

J.D. Gilbert; T.V. Olah; M.J. Morris; A. Bortnick; J. Brunner

1998-04-01T23:59:59.000Z

33

Determination of Selected Herbicides and Phenols in Water and Soils by Solid-Phase Extraction and High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......1987). 6. G.E. Batley. Applications of liquid chromatography with electro- chemical detection to the analysis of oil shale process waters. J. Chromatogr. 382: 409416 (1987). 7. H. Farber, K. Nick, and H.F. Scoeler. Determination......

Irena Baranowska; Celina Pieszko

2000-05-01T23:59:59.000Z

34

Simultaneous Quantitation of 2-Acetyl-4-tetrahydroxybutylimidazole, 2- and 4-Methylimidazoles, and 5-Hydroxymethylfurfural in Beverages by Ultrahigh-Performance Liquid Chromatography–Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

Simultaneous Quantitation of 2-Acetyl-4-tetrahydroxybutylimidazole, 2- and 4-Methylimidazoles, and 5-Hydroxymethylfurfural in Beverages by Ultrahigh-Performance Liquid Chromatography–Tandem Mass Spectrometry ... An ultrahigh-performance liquid chromatography (UHPLC) tandem mass spectrometric (MS/MS) method was developed for the simultaneous quantification of 2-acetyl-4-tetrahydroxybutylimidazole (THI), 2- and 4-methylimidazoles (2-MI and 4-MI), and 5-hydroxymethylfurfural (HMF) in beverage samples. ... 2-acetyl-4-tetrahydroxybutylimidazole; methylimidazole; 5-hydroxymethylfurfural; carcinogen; beverage; UHPLC; mass spectrometry ...

Jinyuan Wang; William C. Schnute

2011-12-30T23:59:59.000Z

35

Trace determination of triclosan and triclocarban in environmental water samples with ionic liquid dispersive liquid-phase microextraction prior to HPLC–ESI-MS–MS  

Science Journals Connector (OSTI)

A novel and environmentally friendly microextraction method, termed ionic liquid dispersive liquid-phase microextraction (IL-DLPME), has been developed for rapid enrichment of triclosan and triclocarban before an...

Ru-Song Zhao; Xia Wang; Jing Sun; Shan-Shan Wang…

2010-06-01T23:59:59.000Z

36

A High-Speed Counter-Current Chromatography— HPLC—DAD Method for Preparative Isolation and Purification of Two Polymethoxylated Flavones From Taraxacum mongolicum  

Science Journals Connector (OSTI)

......Huang, and L.S. Shi. Chemical con- stituents from...Pharmacopoeia of PR China. Chemical Industry Press: Beijing...Cai, and Y. Xiao. Chemical constituents of Taraxacum...the preparation of 5-HMF, neomangiferin and mangiferin...chromatography/ mass spectrometer platform for the preparative purification......

Shuyun Shi; Zhou Honghao; Yuping Zhang; Yu Zhao; Huang Kelong; Suqin Liu

37

High pressure/high temperature vapor liquid equilibrium study of light gases in hydrogen-coal liquid model compound systems using perturbation chromatography  

SciTech Connect (OSTI)

Perturbation chromatography or gas-liquid partition chromatography (GLPC) provides a powerful tool for making physicochemical measurements. In this investigation GLPC was applied to study the vapor-liquid equilibrium behavior of light gases in nonvolatile coal liquid model compound solvents at high temperatures and high pressures. Improvements made in existing GLPC techniques include: the use of a high pressure tandem proportioning pump to give precise control of the carrier gas flow rate and low pressure drops; a high pressure ionization chamber to detect the injection of very dilute radioactive sample gases; and the use of a microcomputer to provide instantaneous integration and very precise retention times of the chromatographic peaks. Infinite dilution K-values for methane, ethane, propane, n-butane, carbon dioxide, and hydrogen sulfide in hydrogen-dibenzofuran systems were obtained at 100 and 125 C and up to 800 psia. Infinite dilution K-values for the same light gases in hydrogen-9-methylanthracene systems were obtained at 100, 125, 150, 175, and 200 C and up to 3000 psia. Henry's constants were determined for the light gases in 9-methylanthracene. Second cross virial coefficients and vapor phase infinite dilution fugacity coefficients were calculated for methane, ethane, propane, and n-butane in hydrogen. These results were combined with the experimental K-value measurements to obtain Henry's constants in hydrogen-9-methylanthracene mixtures of fixed liquid compositions. Infinite dilution heats of solution of the solute gases in the mixtures were calculated.

Kragas, T.K.

1983-01-01T23:59:59.000Z

38

Analysis of synthetic cannabinoids in herbal blends by means of nano-liquid chromatography  

Science Journals Connector (OSTI)

In this study, a rapid and simultaneous separation of 12 synthetic cannabinoids and ?9-tetrahydrocannabinol (?9-THC) in herbal blends was obtained by means of nano-liquid chromatography (nano-LC). The nano-LC experiments were performed in a 100 ?m i.d. capillary column packed with Cogent® bidentate C18 silica particles for 25.0 cm. All compounds were resolved using an isocratic elution mode in less than 30 min. A mobile phase containing ACN/MeOH/H2O/formic acid 69/5/25/1 (v/v/v/v) was employed for the chromatographic separation. The developed analytical method was validated in terms of precision, linearity, sensitivity and accuracy. Under optimal nano-LC–UV conditions, the resulting RSD percentages for intra-day and inter-day repeatability, related to retention time and peak area, were below 2.98 and 6.40%, respectively. Limits of detection and quantification were 0.2 and 0.5 ?g/mL, respectively, for all the studied compounds. Linearity was assessed in the concentration range of interest for all analytes with determination coefficients r2 ? 0.9975. The method was then applied to the determination of synthetic cannabinoids in herbal blends. Quantitative analyses of the cannabimimetic compounds in six products showed that there was a wide difference in the concentration of the studied compounds among different products. Further, the nano-LC system was coupled with a mass spectrometer measuring the MS and MS–MS spectra to unequivocally identify the cannabinoids present in smoking mixtures.

Gustavo Merola; Zeineb Aturki; Giovanni D’Orazio; Rossella Gottardo; Teodora Macchia; Franco Tagliaro; Salvatore Fanali

2012-01-01T23:59:59.000Z

39

Coupling Temperature Control with Electrochemically Modulated Liquid Chromatography: Fundamental Aspects and Applications  

SciTech Connect (OSTI)

The primary focus of the doctoral research presented herein has been the integration of temperature control into electrochemically modulated liquid chromatography (EMLC). The combination of temperature control and the tunable characteristics of carbonaceous EMLC stationary phases have been invaluable in deciphering the subtleties of the retention mechanism. The effects of temperature and E{sub app} on the retention of several naphthalene disulfonates were therefore examined by the van' Hoff relationship. The results indicate that while the retention of both compounds is exothermic at levels comparable to that in many reversed-phase separations, the potential dependence of the separation is actually entropically affected in a manner paralleling that of several classical ion exchange systems. Furthermore, the retention of small inorganic anions at constant temperature also showed evidence of an ion exchange type of mechanism. While a more complete mechanistic description will come from examining the thermodynamics of retention for a wider variety of analytes, this research has laid the groundwork for full exploitation of temperature as a tool to develop retention rules for EMLC. Operating EMLC at elevated temperature and flow conditions has decreased analysis time and has enabled the separation of analytes not normally achievable on a carbon stationary phase. The separation of several aromatic sulfonates was achieved in less than 1 min, a reduction of analysis time by more than a factor of 20 as compared to room temperature separations. The use of higher operating temperatures also facilitated the separation of this mixture with an entirely aqueous mobile phase in less than 2 min. This methodology was extended to the difficult separation of polycyclic aromatic hydrocarbons on PGC. This study also brought to light the mechanistic implications of the unique retention behavior of these analytes through variations of the mobile phase composition.

Lisa M. Ponton

2004-12-19T23:59:59.000Z

40

Silica, Hybrid Silica, Hydride Silica and Non-Silica Stationary Phases for Liquid Chromatography  

Science Journals Connector (OSTI)

......Marcon G., Tolon-Becerra A. Inputs of heavy metals due to agrochemical use in tobacco fields in Brazil's Southern Region. Environmental...chromatography influence of sorbent character, mobile phase composition, and pH on retention of basic compounds. Journal of Chromatography......

Endler M. Borges

2014-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Silica, Hybrid Silica, Hydride Silica and Non-Silica Stationary Phases for Liquid Chromatography  

Science Journals Connector (OSTI)

......microm was named HPLC. The price one had to pay was a high pressure...Ascentis Express C18, Acquity Ethylene Bridged Hybrid (BEH). and...the shape of their peaks on ethylene hybrid stationary phase under...contrast to what is observed for ethylene hybrid stationary phases in......

Endler M. Borges

2014-09-01T23:59:59.000Z

42

Sorptive extraction using polydimethylsiloxane/metal–organic framework coated stir bars coupled with high performance liquid chromatography-fluorescence detection for the determination of polycyclic aromatic hydrocarbons in environmental water samples  

Science Journals Connector (OSTI)

Abstract In this work, metal–organic frameworks (MOFs, Al-MIL-53-NH2) were synthesized via the hydrothermal method, and novel polydimethylsiloxane/metal–organic framework (PDMS/MOFs, PDMS/Al-MIL-53-NH2)-coated stir bars were prepared by the sol–gel technique. The preparation reproducibility of the PDMS/MOFs-coated stir bar was good, with relative standard deviations (RSDs) ranging from 4.8% to 14.9% (n = 7) within one batch and from 6.2% to 16.9% (n = 6) among different batches. Based on this fact, a new method of PDMS/MOFs-coated stir bar sorptive extraction (SBSE) and ultrasonic-assisted liquid desorption (UALD) coupled with high performance liquid chromatography-fluorescence detection (HPLC-FLD) was developed for the determination of polycyclic aromatic hydrocarbons (PAHs) in environmental water samples. To obtain the best extraction performance for PAHs, several parameters affecting SBSE, such as extraction time, stirring rate, and extraction temperature, were investigated. Under optimal experimental conditions, wide linear ranges and good \\{RSDs\\} (n = 7) were obtained. With enrichment factors (EFs) of 16.1- to 88.9-fold (theoretical EF, 142-fold), the limits of detection (LODs, S/N = 3) of the developed method for the target \\{PAHs\\} were found to be in the range of 0.05–2.94 ng/L. The developed method was successfully applied to the analysis of \\{PAHs\\} in Yangtze River and East Lake water samples.

Cong Hu; Man He; Beibei Chen; Cheng Zhong; Bin Hu

2014-01-01T23:59:59.000Z

43

E-Print Network 3.0 - agent combining hplc Sample Search Results  

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

Sci. Technol. 1988, 22, 651-658 Physical-Chemical Properties of Chlorinated Dibenzo-p-dioxins Summary: purification. Methanol high-performanceliquid chromatography (HPLC) grade...

44

The Separation, Identification, and Quantitation of Cannabinoids and Their t-Butyldimethylsilyl, Trimethylsilylacetate, and Diethylphosphate Derivatives Using High-Pressure Liquid Chromatography, Gas-Liquid Chromatography, and Mass Spectrometry  

Science Journals Connector (OSTI)

......The neces- sity for internal standards; the sensitivity of the HPLC...80-100 mesh) acid washed and DMSC treated at 200 , with a He...The selection of an internal standard for quantitative HPLC 3 See...necessary to choose an internal standard which can be readily separated......

E.E. Knaus; R.T. Coutts; C.W. Kazakoff

1976-11-01T23:59:59.000Z

45

High performance liquid chromatography method for the determination of patulin and 5-hydroxymethylfurfural in fruit juices marketed in Malaysia  

Science Journals Connector (OSTI)

Abstract A rapid, simple, improved method for the simultaneous determination of patulin (PAT) and 5-hydroxymethylfurfural (5-HMF) in fruit juices is described. The target compounds were extracted with ethyl acetate using vortex followed by high performance liquid chromatographic separation. PAT and 5-HMF were separated within 4 min using Poroshell C18 column with acetonitrile:water (1:9, v/v) as the mobile phase. Under the optimized conditions, the detection limits of PAT and 5-HMF were 0.25 and 0.46 ng mL?1, respectively while the quantification limits were 0.76 and 1.40 ng mL?1, respectively. The recoveries of PAT and 5-HMF at 50, 750 and 5000 ng g?1 ranged from 92.8 to 108%. The proposed method was applied to fivety-six fruit juices (apple, mango, pineapple, guava, lychee, tamarind, soursop and mixed fruit) and PAT was found in three samples ranging from 13.1–33.7 ug L?1. 5-HMF was found in all the samples ranging from 0.08 to 91.5 mg L?1. Liquid chromatography-tandem mass spectrometry with triple quadrupole analyzer was used to confirm the presence of 5-HMF and PAT in some of the contaminated samples.

Tien Ping Lee; Ronnie Sakai; Normaliza Abdul Manaf; Ainolsyakira Mohd Rodhi; Bahruddin Saad

2014-01-01T23:59:59.000Z

46

Component-Type Analysis of Shale Oil by Liquid and Thin-Layer Chromatography  

Science Journals Connector (OSTI)

......on Analytical Chemistry and Applied Spec...of bitumen and coal liquids (11-13...an automated combustion method, sulfur...to incomplete combustion in the FID flame...virtually complete combustion during the first...Selucky of the Coal Depart ment...in Analytical Chemistry in the Petroleum......

B.J. Fuhr; L.R. Holloway; C. Reichert; S.K. Barua

1988-02-01T23:59:59.000Z

47

Qualitative and quantitative analysis of low molecular weight phenols by high pressure liquid chromatography  

E-Print Network [OSTI]

. A. , Bethany College Chairman of Advisory Comnittee: Dr. Lloyd W. Rooney A high performance liquid chromatographic (HPI C) method was de- veloped for the separation and identification of substituted benzoic and cinnamic acids (phenolic acids...). The 8 commonly occurring phenolic acids chosen as standards were: gallic, protocatechuic, p-hydroxyben- zoic, vanillic, caffeic, p-coumaric, feruli c and ci nnami c acids. Separation was on a nonpolar C18 substituted, silica based column with elution...

Hahn, David Henry

2012-06-07T23:59:59.000Z

48

Quantification by Gas Chromatography of N,N?-Di-(2-chloroethyl)-phosphorodiamidic Acid in the Plasma of Patients Receiving Isophosphamide  

Science Journals Connector (OSTI)

...Analysis of Phenanthrols in Human Urine by Gas Chromatography-Mass Spectrometry: Potential...phenanthrols were silylated and analyzed by gas chromatography-positive ion chemical ionization-mass...chromatography [(HPLC); refs. 29 -34], gas chromatography [GC; refs. 35, 36...

Bruce M. Bryant; Michael Jarman; Michael H. Baker; Ian E. Smith; John F. Smyth

1980-12-01T23:59:59.000Z

49

Solvent viscosity mismatch between the solute plug and the mobile phase: Considerations in the applications of two-dimensional HPLC  

SciTech Connect (OSTI)

Understanding the nature of viscosity contrast induced flow instabilities is an important aspect in the design of two-dimensional HPLC separations. When the viscosity contrast between the sample plug and the mobile phase is sufficiently large, the phenomenon known as viscous fingering can be induced. Viscous fingering is a flow instability phenomenon that occurs at the interface between two fluids with different viscosities. In liquid chromatography, viscous fingering results in the solute band undergoing a change in form as it enters into the chromatography column. Moreover, even in the absence of viscous fingering, band shapes change shape at low viscosity contrasts. These changes can result in a noticeable change in separation performance, with the result depending on whether the solvent pushing the solute plug has a higher or lower viscosity than the solute plug. These viscosity induced changes become more important as the solute injection volume increases and hence understanding the process becomes critical in the implementation of multidimensional HPLC techniques, since in these techniques the sample injection plug into the second dimension is an order of magnitude greater than in one-dimensional HPLC. This review article assesses the current understanding of the viscosity contrast induced processes as they relate to liquid chromatographic separation behaviour.

Shalliker, R. Andrew [University of Western Sydney, Australia; Guiochon, Georges A [ORNL

2010-01-01T23:59:59.000Z

50

Analysis of liquified coal for nitrogenous bases; separation by high performance liquid chromatography and identification by probe microdistillation/mass spectrometry  

E-Print Network [OSTI]

ANALYSIS OF LIQUIFIED COAL FOR NITROGENOUS BASES; SEPARATION BY HIGH PERFORMANCE LIQUID CHROMATOGRAPHY AND IDENTIFICATION BY PROBE MICRODISTILLATION/MASS SPECTROMETRY A Thesis by LEONARD ROYCE SCHRONK Submitted to the Graduate College... AND IDENTIFICATION BY PROBE MICRODISTILLATION/MASS SPECTROMETRY A Thesis by LEONARD ROYCE SCHRONK Approved as to style and content by: Co-Charrman o Commlxtte ) (Co-Chazrman o Committee Me er Hea of Department December 1978 ABSTRACT Analysis of Liquified...

Schronk, Leonard Royce

1978-01-01T23:59:59.000Z

51

Periostin, discovered by nano-flow liquid chromatography and mass spectrometry, is a novel marker of diabetic retinopathy  

SciTech Connect (OSTI)

Research highlights: {yields} In proliferative membrane and epiretinal membrane specimens, the numbers of proteins are 225 and 154, respectively, and 123 proteins are common to both. {yields} Periostin and thrombospondin-1 proteins are unique to the proliferative membrane specimens. {yields} The expression of periostin is significantly up-regulated in proliferative membrane specimens. -- Abstract: Diabetes can lead to serious microvascular complications including proliferative diabetic retinopathy (PDR), the leading cause of blindness in adults. Recent studies using gene array technology have attempted to apply a hypothesis-generating approach to elucidate the pathogenesis of PDR, but these studies rely on mRNA differences, which may or may not be related to significant biological processes. To better understand the basic mechanisms of PDR and to identify potential new biomarkers, we performed shotgun liquid chromatography (LC)/tandem mass spectrometry (MS/MS) analysis on pooled protein extracts from neovascular membranes obtained from PDR specimens and compared the results with those from non-vascular epiretinal membrane (ERM) specimens. We detected 226 distinct proteins in neovascular membranes and 154 in ERM. Among these proteins, 102 were specific to neovascular membranes and 30 were specific to ERM. We identified a candidate marker, periostin, as well as several known PDR markers such as pigment epithelium-derived factor (PEDF). We then performed RT-PCR using these markers. The expression of periostin was significantly up-regulated in proliferative membrane specimens. Periostin induces cell attachment and spreading and plays a role in cell adhesion. Proteomic analysis by LC/MS/MS, which permits accurate quantitative comparison, was useful in identifying new candidates such as periostin potentially involved in the pathogenesis of PDR.

Takada, Michiya [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan)] [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan); Ban, Yoshiyuki, E-mail: yshyban@yahoo.co.jp [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan)] [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan); Yamamoto, Gou [Department of Oral Pathology and Diagnosis, School of Dentistry, Showa University, Tokyo (Japan)] [Department of Oral Pathology and Diagnosis, School of Dentistry, Showa University, Tokyo (Japan); Ueda, Toshihiko; Saito, Yuta; Nishimura, Eiichi; Fujisawa, Kunimi; Koide, Ryohei [Department of Ophthalmology, Showa University School of Medicine, Tokyo (Japan)] [Department of Ophthalmology, Showa University School of Medicine, Tokyo (Japan); Mizutani, Masakazu; Kozawa, Tadahiko; Shiraishi, Yuji [Kozawa Eye Hospital and Diabetes Center, Ibaraki-ken (Japan)] [Kozawa Eye Hospital and Diabetes Center, Ibaraki-ken (Japan); Bando, Yasuhiko [Biosys Technologies, Inc., Meguro, Tokyo (Japan)] [Biosys Technologies, Inc., Meguro, Tokyo (Japan); Tachikawa, Tetsuhiko [Department of Oral Pathology and Diagnosis, School of Dentistry, Showa University, Tokyo (Japan)] [Department of Oral Pathology and Diagnosis, School of Dentistry, Showa University, Tokyo (Japan); Hirano, Tsutomu [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan)] [Division of Diabetes, Metabolism and Endocrinology, Department of Internal Medicine, Showa University School of Medicine, Tokyo (Japan)

2010-08-20T23:59:59.000Z

52

Quantification of Nimesulide in Human Plasma by High-Performance Liquid Chromatography with Ultraviolet Detector (HPLC-UV): Application to Pharmacokinetic Studies in 28 Healthy Korean Subjects  

Science Journals Connector (OSTI)

......their ideal weight, were recruited by Internet advertisement and participated in this...cardiovascular system or alcohol and drug abuse were excluded. Subjects were selected after...Sulfonamides administration & dosage blood Young Adult...

Mi-Sun Kim; Yoo-Sin Park; Shin-Hee Kim; Sang-Yeon Kim; Min-Ho Lee; Youn-Hee Kim; Do-Wan Kim; Seok-Chul Yang; Ju-Seop Kang

2012-05-01T23:59:59.000Z

53

The Separation, Identification, and Quantitation of Cannabinoids and Their t-Butyldimethylsilyl, Trimethylsilylacetate, and Diethylphosphate Derivatives Using High-Pressure Liquid Chromatography, Gas-Liquid Chromatography, and Mass Spectrometry  

Science Journals Connector (OSTI)

......separated on a 1/4-inch x 6-ft glass column packed with 1/2% OV-101 on Chrom 750(80-100 mesh) acid washed and DMSC treated at 200 , with a He flow rate of 60 ml/min. HPLC analyses were effected using a Water's Associates ALC/GPC-204......

E.E. Knaus; R.T. Coutts; C.W. Kazakoff

1976-11-01T23:59:59.000Z

54

Rapid Determination of Bile Acids in Bile from Various Mammals by Reversed-Phase Ultra-Fast Liquid Chromatography  

Science Journals Connector (OSTI)

......Sultana N. , Arayne M.S., Khan M.M., Saleem D.M., Mirza A.Z. Determination of tryptophan in raw materials, rat brain and human plasma by RP-HPLC technique. Journal of Chromatographic Science (2012) 50:531-537. 24 Hofmann A.F......

Gu Leng Ri Si; Peng Yao; Luwen Shi

2014-12-01T23:59:59.000Z

55

Preparative isolation and purification of chemical constituents from the root of Adenophora tetraphlla by high-speed counter-current chromatography with evaporative light scattering detection  

Science Journals Connector (OSTI)

Preparative high-speed counter-current chromatography (HSCCC), as a continuous liquid–liquid partition chromatography with no solid support matrix, combined with evaporative light scattering detection (ELSD) was employed for systematic separation and purification of non-chromophoric chemical components from Chinese medicinal herb Adenophora tetraphlla (Thunb.), Fisch. Nine compounds, including ?-spinasterol, ?-sitosterol, nonacosan-10-ol, 24-methylene cycloartanol, lupenone, 3-O-palmitoyl-?-sitosterol, 3-O-?-d-glucose-?-sitosterol, eicosanoic acid and an unknown compound, were obtained. The compounds were all above 95% determined by high-performance liquid chromatography (HPLC)–ELSD, and their structures were identified by 1H NMR and chemical ionization mass spectroscopy (CI-MS). The results demonstrate that HSCCC coupled with ELSD is a feasible and efficient technique for systematic isolation of non-chromophoric components from traditional medicinal herbs.

Shun Yao; Renming Liu; Xuefeng Huang; Lingyi Kong

2007-01-01T23:59:59.000Z

56

Size-exclusion chromatography system for macromolecular interaction analysis  

DOE Patents [OSTI]

A low pressure, microcomputer controlled system employing high performance liquid chromatography (HPLC) allows for precise analysis of the interaction of two reversibly associating macromolecules such as proteins. Since a macromolecular complex migrates faster than its components during size-exclusion chromatography, the difference between the elution profile of a mixture of two macromolecules and the summation of the elution profiles of the two components provides a quantifiable indication of the degree of molecular interaction. This delta profile is used to qualitatively reveal the presence or absence of significant interaction or to rank the relative degree of interaction in comparing samples and, in combination with a computer simulation, is further used to quantify the magnitude of the interaction in an arrangement wherein a microcomputer is coupled to analytical instrumentation in a novel manner.

Stevens, Fred J. (Downers Grove, IL)

1988-01-01T23:59:59.000Z

57

Temperature-controlled ionic liquid dispersive liquid phase microextraction combined with ultra-high-pressure liquid chromatography for the rapid determination of triclosan, triclocarban and methyl-triclosan in aqueous samples  

Science Journals Connector (OSTI)

As extraction solvents, ionic liquids have green characteristics. In this study, an environmentally benign analytical method termed temperature-controlled ionic liquid dispersive liquid phase microextraction (TIL...

JieHong Guo; XingHong Li; XueLi Cao; Lei Qu; DeKun Hou…

2010-12-01T23:59:59.000Z

58

Identification and Quantification of Several Contaminated Compounds in Replacement Liquids of Electronic Cigarettes by Gas Chromatography–Mass Spectrometry  

Science Journals Connector (OSTI)

......sodium sulfate as a water scavenger were added...0 mL of Milli-Q water containing ascorbic...finally dried in a nitrogen stream. The residue...injected into the gas chromatography...are miscible with water, acetone, diethyl...to the high water solubility of TEG, TeED, PEG......

Jin-Aa Oh; Ho-Sang Shin

2014-11-01T23:59:59.000Z

59

Comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry of coal liquids produced during a coal liquefaction process  

SciTech Connect (OSTI)

Comprehensive two-dimensional gas chromatography (GC) coupled to time-of-flight mass spectrometry (MS) has been applied to the analysis of coal-derived liquids from the former British Coal Point-of-Ayr coal liquefaction plant. The feed to the hydrocracker and the resulting product were analyzed. The results refer almost exclusively to the plant-derived recycle solvent, known as the liquefaction solvent; the molecular mass range of the GC does not exceed that of the solvent. The method allows for the resolution of the numerous structural isomers of tetralin and methyl indan, one pair of hydrogen-donor (necessary for the dissolution of coal) and isomeric nondonor (that reduce the hydrogen donors) components of the recycle solvent. In addition, the n-alkanes that concentrate in the recycle solvent are easily observed in comparison with the results from one-dimensional GC-MS. 24 refs., 6 figs., 1 tab.

Jacqui F. Hamilton; Alistair. C. Lewis; Marcos Millan; Keith D. Bartle; Alan A. Herod; Rafael Kandiyoti [University of York, York (United Kingdom). Department of Chemistry

2007-01-15T23:59:59.000Z

60

Size exclusion chromatography for the unambiguous detection of aliphatics in fractions from petroleum vacuum residues, coal liquids, and standard materials, in the presence of aromatics  

SciTech Connect (OSTI)

A method has been developed using size exclusion chromatography (SEC) in heptane eluent that can detect aliphatics unambiguously without fractionation to remove aromatics. Spherical molecules such as colloidal silicas elute at the exclusion limit, while alkanes up to C{sub 50} elute through the porosity of the column. Detection of aliphatics was defined by use of an evaporative light scattering (ELS) detector with the simultaneous absence of UV absorbance at 300 nm. Alkanes smaller than C{sub 12} were not detected because the conditions of operation of the ELS caused their evaporation. All aromatics eluted after the permeation limit of about 25 min and were not detected until well after 45 min by their UV absorbance. The SEC method was applied to petroleum vacuum residues and coal liquids, and their fractions were soluble in pentane or heptane. High-temperature (HT) GC-MS confirmed the presence of alkanes in the pentane- and heptane-soluble fractions of petroleum vacuum residues, but did not elute any of the aromatics known to be present from SEC. Alkanes were examined in pentane-soluble fractions of a coal digest and a low-temperature coal tar; alkanes up to C{sub 40} were detected in the low-temperature tar and, although present in the digest, were masked by aromatics. No alkanes were detected by either SEC or HT GC-MS in fractions from a coal tar pitch. Aromatics in coal liquids and one petroleum residue were also examined by SEC using NMP as eluent and by UV fluorescence spectroscopy. The SEC method will find application to pentane- and heptane-soluble fractions of petroleum liquids and coal liquids where the alkanes are concentrated relative to the more abundant aromatics. 43 refs., 10 figs., 2 tabs.

Eiman M. Al-Muhareb; Fatma Karaca; Trevor J. Morgan; Alan A. Herod; Ian D. Bull; Rafael Kandiyoti [Imperial College, London (United Kingdom). Department of Chemical Engineering

2006-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Recycling Foam Countercurrent Chromatography  

Science Journals Connector (OSTI)

A new sample injection method for foam countercurrent chromatography (CCC), named the “recycle injection system”, has been developed. ... In this recycling foam CCC system, the effluent from the liquid outlet is directly returned into the column through the sample feed line so that the sample solution is continuously recycled. ...

Hisao Oka; Masato Iwaya; Ken-ichi Harada; Makoto Suzuki; Yoichiro Ito

2000-02-26T23:59:59.000Z

62

Hydrophilic interaction liquid chromatography with tandem mass spectrometric detection applied for analysis of pteridines in two Graphosoma species (Insecta: Heteroptera)  

Science Journals Connector (OSTI)

Abstract A new separation method involving hydrophilic interaction chromatography with tandem mass spectrometric detection has been developed for the analysis of pteridines, namely biopterin, isoxanthopterin, leucopterin, neopterin, xanthopterin and erythropterin in the cuticle of heteropteran insect species. Two columns, Atlantis HILIC Silica and ZIC®-HILIC were tested for the separation of these pteridines. The effect of organic modifier content, buffer type, concentration and pH in mobile phase on retention and separation behavior of the selected pteridines was studied and the separation mechanism was also investigated. The optimized conditions for the separation of pteridines consisted of ZIC®-HILIC column, mobile phase composed of acetonitrile/5 mM ammonium acetate, pH 6.80, 85/15 (v/v), flow rate 0.5 mL/min and column temperature 30 °C. Detection was performed by tandem mass spectrometry operating in electrospray ionization with Agilent Jet Stream technology using the selected reaction monitoring mode. The optimized method provided a linearity range from 0.3 to 5000 ng/mL (r > 0.9975) and repeatability with relative standard deviation < 8.09% for all the studied pteridines. The method was applied to the analysis of pteridines in the cuticle of larvae and three adult color forms of Graphosoma lineatum and one form of Graphosoma semipunctatum (Insecta: Hemiptera: Heteroptera: Pentatomidae). The analysis shows that different forms of Graphosoma species can be characterized by different distribution of individual pteridines, which affects the coloration of various forms. Only isoxanthopterin was found in all the five forms tested.

Petr Kozlík; Jan Krají?ek; Kv?ta Kalíková; Eva Tesa?ová; Radomír ?abala; Alice Exnerová; Pavel Štys; Zuzana Bosáková

2013-01-01T23:59:59.000Z

63

Selective detection of primary aromatic amines in complex mixtures by liquid chromatography with electrochemical detection using a short reversed-phase column  

SciTech Connect (OSTI)

Selective detection of primary aromatic amines (PAAs) in the presence of phenols by liquid chromatography with electrochemical detection was investigated. PAAs were resolved from other aromatic compounds, using three mobile phases, at various electrode potentials and flow rates. The phases used a combination of pH and organic modifiers (tetrahydrofuran, acetonitrile, or n-propanol) to optimize the degree of separation. As the pH of the mobile phase was increased, the signals for two- and three-ring PAAs decreased and became independent of pH at values between 4 and 8, while the signals from aniline and phenols increased. Selective detection of PAAs is feasible at pH 2.2 at potentials of 0.7 to 0.85 V vs Ag/AgCl. The best result was obtained with a 35 vol % tetrahydrofuran/water mobile phase, which yielded the highest signal for aniline and the lowest signal for phenol at pH 2.2 with satisfactory retention times. Electrochemical detectors are about one thousand times more sensitive to PAAs and phenols than ultraviolet detectors. The results obtained will permit design and construction of a portable PAA monitor with an appropriate sample concentrator, pump, and injection system. 20 refs., 11 figs., 2 tabs.

Otagawa, T.; Zaromb, S.; Stetter, J.R.

1985-01-01T23:59:59.000Z

64

Extraction of Three Bioactive Diterpenoids from Andrographis paniculata: Effect of the Extraction Techniques on Extract Composition and Quantification of Three Andrographolides Using High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......high-pressure pumps (P-50A, P-200A), a recycler and a chiller (Accel 500 LC, Thermo scientific, USA) units. The HPLC...and 16.67 min for AP1, AP2 and AP3, respectively, when absorption was measured at 210 nm (Table-I). At this wavelength......

Satyanshu Kumar; Tushar Dhanani; Sonal Shah

2014-10-01T23:59:59.000Z

65

Extraction of Three Bioactive Diterpenoids from Andrographis paniculata: Effect of the Extraction Techniques on Extract Composition and Quantification of Three Andrographolides Using High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......Considering the effect of temperature on the solubility of...observed with a rise in temperature from 60 to 80C. The...selected for the method development. Under the optimized...G.S. HPLC method development and characterization...Andrographis paniculata on snake venom induced death......

Satyanshu Kumar; Tushar Dhanani; Sonal Shah

2014-10-01T23:59:59.000Z

66

The Gels for Liquid Chromatography  

Science Journals Connector (OSTI)

......vicinity of 1-20 are practical, and values in the vicinity of 2 are preferred. Since ion exchange D values may easily ex- ceed 106, it is necessary to involve mechanisms for removal of such excess chemical affinity. This can be approached through the......

David H. Freeman

1973-04-01T23:59:59.000Z

67

Polymeric Columns for Liquid Chromatography  

Science Journals Connector (OSTI)

......with the polymer in the lithium ionic form. Elution...with the polymer in the lithium form. As will be seen...improvements in polymer synthesis techniques coupled with...Determination of glycerol, acetate, and ethanol in the...that this will require synthesis of entirely new polymers......

James R. Benson; Dexter J. Woo

1984-09-01T23:59:59.000Z

68

Polymeric Columns for Liquid Chromatography  

Science Journals Connector (OSTI)

......2285. 64. 33. B.Z. Ginzburg and D. Cohen. Trans. Faraday Soc. 60: 185 (1964). 34. V.F. Felicetta et al. Tappi 42: 496-502 (1959). 35. J.K.N. Jones and R.A. Wall. Can. J. Chem. 38:2290-294 (1960). S.J. Angyal......

James R. Benson; Dexter J. Woo

1984-09-01T23:59:59.000Z

69

Inductively Coupled Plasma Mass Spectrometry and Atomic Emission Spectrometry Coupled to High-Performance Liquid Chromatography for Speciation and Detection of Organotin Compounds  

Science Journals Connector (OSTI)

......graphite furnace atomic absorption ( G F A A ) , flame atomic...fluent is monitored by atomic absorption (20-22). In this study...8 C with a re frigerated chiller (Neslab Instrument, Inc...gas chromatography atomic absorption spectrometry. Anal. Chem......

Hamzar Suyani; John Creed; Tim Davidson; Joseph Caruso

1989-03-01T23:59:59.000Z

70

Determination of Zofenopril and Its Active Metabolite in Human Plasma Using High-Performance Liquid Chromatography Combined With a Triple-Quadruple Tandem Mass Spectrometer  

Science Journals Connector (OSTI)

......Chromatography Combined With a Triple-Quadruple Tandem Mass Spectrometer Yuan Tian 1 Jing Cao 1 Lifang Luo 1 Zunjian Zhang 1 2 * Pengcheng Ma 3 * Author to whom correspondence should be addressed. Email: zunjianzhangcpu@hotmail.com 1 Key Laboratory of Drug......

Yuan Tian; Jing Cao; Lifang Luo; Zunjian Zhang; Pengcheng Ma

2014-06-01T23:59:59.000Z

71

Measurement of elemental speciation by liquid chromatography -- inductively coupled plasma mass spectrometry (LC-ICP-MS) with the direct injection nebulizer (DIN)  

SciTech Connect (OSTI)

This thesis is divided into 4 parts: elemental speciation, speciation of mercury and lead compounds by microbore column LC-ICP-MS with direct injection nebulization, spatially resolved measurements of size and velocity distributions of aerosol droplets from a direct injection nebulizer, and elemental speciation by anion exchange and size exclusion chromatography with detection by ICP-MS with direct injection nebulization. Tabs, figs, refs.

Shum, S.

1993-05-01T23:59:59.000Z

72

Formation of iron complexs from trifluoroacetic acid based liquid...  

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

of iron complexs from trifluoroacetic acid based liquid chromatography mobile phases as interference ions in liquid Formation of iron complexs from trifluoroacetic acid based...

73

Solid-Phase Extraction Combined with High-Performance Liquid Chromatography?Atmospheric Pressure Chemical Ionization?Mass Spectrometry Analysis of Pesticides in Water:? Method Performance and Application in a Reconnaissance Survey of Residues in Drinking Water in Greater Cairo, Egypt  

Science Journals Connector (OSTI)

Solid-Phase Extraction Combined with High-Performance Liquid Chromatography?Atmospheric Pressure Chemical Ionization?Mass Spectrometry Analysis of Pesticides in Water:? Method Performance and Application in a Reconnaissance Survey of Residues in Drinking Water in Greater Cairo, Egypt ... Each shipment, which included 24 cartridges, weighed <454 g and cost approximately 200 Egyptian pounds ($40 U.S.). ...

Thomas L. Potter; Mahmoud A. Mohamed; Hannah Ali

2006-12-22T23:59:59.000Z

74

Gas Chromatography  

Science Journals Connector (OSTI)

Researchers from the University of Missouri and ICx Nomadics have reported on the use of a optofluidic ring resonator (OFRR) sensor for on-column detection ?. ... Although substantial differences were noted between fresh and aged (or oxidized) oils, many of the compounds in the oxidized oil went unidentified due to lack of library mass spectral data. ... A high resolution MEMS based gas chromatography column for the analysis of benzene and toluene gaseous mixtures ...

Frank L. Dorman; Joshua J. Whiting; Jack W. Cochran; Jorge Gardea-Torresdey

2010-05-26T23:59:59.000Z

75

Liquid adsorption chromatography of chelates. The phenomenon of dissociation of chelates in the stationary phase and its influence on chromatographic behavior  

SciTech Connect (OSTI)

The conclusions derived from a mathematical model for the chromatographic behavior of chelates and the influence of the total amounts of the reagent and metal on their chromatographic mobility have been confirmed experimentally in the thin-layer chromatography of iron acetylacetonate in the presence of acetylacetone. The distribution and content of iron on the chromatogram was monitored radiochemically with the iron 56 radionuclide. Within the framework of the validated model it is shown that with increasing adsorption capacity of the solvent a suppression of the dissociation of chelates occurs. Predictions are given for zinc, lead, nickel, cadmium, and copper complexes as well.

Timerbaev, A.R.; Salov, V.V.; Petrukhin, O.M.; Zolotov, Yu.A.

1987-08-01T23:59:59.000Z

76

INTERNATIONAL CHROMATOGRAPHY GUIDE:  

Science Journals Connector (OSTI)

......A. Advances in Chromatography (9 Volumes) Gudzinowicz, Benjamin J. Gas Chromatographic Analysis of Drugs and Pesticides...Four-Language Technical Dictionary of Chromatography 1970 Jeffery, P. G. and Kipping, P. J. Gas Analysis by Gas Chromatography......

Part 6 Publishers' Directory

1974-02-01T23:59:59.000Z

77

Rapid, potentially automatable, method extract biomarkers for HPLC/ESI/MS/MS to detect and identify BW agents  

SciTech Connect (OSTI)

The program proposes to concentrate on the rapid recovery of signature biomarkers based on automated high-pressure, high-temperature solvent extraction (ASE) and/or supercritical fluid extraction (SFE) to produce lipids, nucleic acids and proteins sequentially concentrated and purified in minutes with yields especially from microeukaryotes, Gram-positive bacteria and spores. Lipids are extracted in higher proportions greater than classical one-phase, room temperature solvent extraction without major changes in lipid composition. High performance liquid chromatography (HPLC) with or without derivatization, electrospray ionization (ESI) and highly specific detection by mass spectrometry (MS) particularly with (MS){sup n} provides the detection, identification and because the signature lipid biomarkers are both phenotypic as well as genotypic biomarkers, insights into potential infectivity of BW agents. Feasibility has been demonstrated with detection, identification, and determination of infectious potential of Cryptosporidium parvum at the sensitivity of a single oocyst (which is unculturable in vitro) and accurate identification and prediction, pathogenicity, and drug-resistance of Mycobacteria spp.

White, D.C. [Univ. of Tennessee, Knoxville, TN (United States). Center for Environmental Biotechnology]|[Oak Ridge National Lab., TN (United States). Environmental Science Div.; Burkhalter, R.S.; Smith, C. [Univ. of Tennessee, Knoxville, TN (United States). Center for Environmental Biotechnology; Whitaker, K.W. [Microbial Insights, Inc., Rockford, TN (United States)

1997-12-31T23:59:59.000Z

78

Analysis of Thiodiglycol: Validation of Semi-Volatile Analysis by HPLC-MS/MS by EPA Method MS777  

SciTech Connect (OSTI)

The Environmental Protection Agency's (EPA) Region 5 Chicago Regional Laboratory (CRL) developed a method for the analysis of thiodiglycol, the breakdown product of the sulfur mustard HD, in water by high performance liquid chromatography tandem mass spectrometry (HPLC-MS/MS), titled Method EPA MS777 (hereafter referred to as EPA CRL SOP MS777). This draft standard operating procedure (SOP) was distributed to multiple EPA laboratories and to Lawrence Livermore National Laboratory, which was tasked to serve as a reference laboratory for EPA's Environmental Reference Laboratory Network (ERLN) and to develop and validate analytical procedures. The primary objective of this study was to verify the analytical procedures described in MS777 for analysis of thiodiglycol in aqueous samples. The gathered data from this study will be used to: (1) demonstrate analytical method performance; (2) generate quality control acceptance criteria; and (3) revise the SOP to provide a validated method that would be available for use during a homeland security event. The data contained in this report will be compiled, by EPA CRL, with data generated by other EPA Regional laboratories so that performance metrics of Method EPA MS777 can be determined.

Owens, J; Koester, C

2008-07-24T23:59:59.000Z

79

Analyses of tissues of marine species for dioxin-like and total PCBs by HPLC/PDA  

SciTech Connect (OSTI)

During 1993--1994, eight commercially important seafood species were collected from various coastal regions of the contiguous US. Whole body of blue mussels, fish muscle and crustacean muscle and hepatopancreas were analyzed (n - 700 samples) for dioxin-like chlorobiphenyls (CBs) and other widespread and persistent chlorinated hydrocarbons (e.g., other selected CBs, DDTS) using a rapid high-performance liquid chromatography photodiode array detection (HPLC/PDA) method. Total CB concentrations and toxic equivalents (TEQs) of dioxin-like CBs were also determined. Although the nonplanar congeners were the most abundant congeners measured in the seafood tissues (concentrations ranging from 0. 1 to 1,500 ng/g, wet weight), several dioxin-like CBs (e.g., 77, 105, 118, 126) were also measured in these tissues in concentrations ranging from 0.1 to 680 ng/g, wet weight. Similar to previous studies, most seafood tissues analyzed contained total CB concentrations and TEQs of dioxin-like CBs that were well below the US FDA and Canadian action levels. However, several crustacean hepatopancreas samples from urban areas (e.g., Dungeness crab from Elliott Bay in Puget Sound, northern lobster from Deer Island in Boston Harbor) did contain total PCB and TEQ concentrations that exceeded these action limits. Dioxin-like CB congeners 105, 118, 126 and 156 were the largest contributors to the TEQs of the crab and lobster hepatopancreas samples that exceeded action limits.

Ylitalg, G.M.; Buzitis, J.; Chan, S.L.; Krahn, M.M. [NOAA/NMFS, Seattle, WA (United States). Environmental Conservation Division

1995-12-31T23:59:59.000Z

80

HPLC analysis of tonka bean extracts  

Science Journals Connector (OSTI)

Based on the results of GC-MS analysis, an HPLC procedure was developed for the determination of coumarin, dihydrocoumarin, melilotic acid (o...-dihyd-rocoumaric acid), methyl melilotate, ethyl melilotate, 5-hydroxymethylfurfural

Dorothea Ehlers; Michael Pfister…

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Charakterisierung von Grapefruitöl und -saft durch HPLC  

Science Journals Connector (OSTI)

Es wird eine schnelle und zuverlässige HPLC-Methode zur Charakterisierung von Grapefruitöl und -saft vorgestellt. Der individuelle Gehalt an Nootkaton,...1H- und13C-NMR-Spektroskopie identifiziert. Eine der ident...

Hartwig Schulz; Gerd Albroscheit…

1992-09-01T23:59:59.000Z

82

Gas Chromatography -Mass Spectrometry  

E-Print Network [OSTI]

GCMS - 1 Gas Chromatography - Mass Spectrometry GC-MS ANALYSIS OF ETHANOL AND BENZENE IN GASOLINE Last updated: June 17, 2014 #12;GCMS - 2 Gas Chromatography - Mass Spectrometry GC-MS ANALYSIS). The goal of this experiment is to separate the components in a sample of gasoline using Gas Chromatography

Nizkorodov, Sergey

83

Development of a high-throughput fermentation assay using colorimetric measurement of gas production.  

E-Print Network [OSTI]

??Typical methods for determining ethanol production from biomass feedstocks involve the use of High Performance Liquid Chromatography (HPLC) or Gas Chromatography (GC). Such methods require… (more)

Bly, Steven

2008-01-01T23:59:59.000Z

84

Monolithic Silica Stationary Phases in Liquid Chromatography  

Science Journals Connector (OSTI)

......second peak), trypsin inhibitor (third peak) (60). A...modified subsequently by chitosan and 2,6-sialyllactose...Different ratio of phosphate 97 inhibitors rofecoxib buffer & acetonitrile...determination of cyclooxygenase II inhibitors in human plasma. J. Chromatogr......

Imran Ali; Vinay D. Gaitonde; Hassan Y. Aboul-Enein

2009-07-01T23:59:59.000Z

85

Improving liquid chromatography-mass spectrometry sensitivity...  

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

sensitivity using a subambient pressure ionization with nanoelectrospray (SPIN Abstract: In this work the Subambient Pressure Ionization with Nanoelectrospray (SPIN) ion...

86

Determination of 5-Hydroxymethylfurfural in Vinegar Samples by HPLC  

Science Journals Connector (OSTI)

Determination of 5-Hydroxymethylfurfural in Vinegar Samples by HPLC ... The aim of this study was to establish an overview of the HMF (5-hydroxymethylfurfural) content of different vinegar samples. ... Keywords: 5-Hydroxymethylfurfural (HMF); vinegar; balsamic vinegar; HPLC ...

Anne Theobald; Anne Müller; Elke Anklam

1998-04-03T23:59:59.000Z

87

Application of Ionic Liquids in Liquid Chromatography and Electrodriven Separation  

Science Journals Connector (OSTI)

......miscibility with water and organic solvents...responsible for condensation and pollution of...electron spray or atmospheric pressure ionization...changes in analyte recovery or column backpressure...precision, accuracy and recovery. Figure 4. Synthesis...both methanol-water and acetonitrile-water......

Yi Huang; Shun Yao; Hang Song

2013-08-01T23:59:59.000Z

88

Interface for liquid chromatograph-mass spectrometer  

DOE Patents [OSTI]

A moving belt interface for real-time, high-performance liquid chromatograph (HPLC)/mass spectrometer (MS) analysis which strips away the HPLC solvent as it emerges from the end of the HPLC column and leaves a residue suitable for mass-spectral analysis. The interface includes a portable, stand-alone apparatus having a plural stage vacuum station, a continuous ribbon or belt, a drive train magnetically coupled to an external drive motor, a calibrated HPLC delivery system, a heated probe tip and means located adjacent the probe tip for direct ionization of the residue on the belt. The interface is also capable of being readily adapted to fit any mass spectrometer.

Andresen, Brian D. (Pleasanton, CA); Fought, Eric R. (Livermore, CA)

1989-01-01T23:59:59.000Z

89

Interface for liquid chromatograph-mass spectrometer  

DOE Patents [OSTI]

A moving belt interface is described for real-time, high-performance liquid chromatograph (HPLC)/mass spectrometer (MS) analysis which strips away the HPLC solvent as it emerges from the end of the HPLC column and leaves a residue suitable for mass-spectral analysis. The interface includes a portable, stand-alone apparatus having a plural stage vacuum station, a continuous ribbon or belt, a drive train magnetically coupled to an external drive motor, a calibrated HPLC delivery system, a heated probe tip and means located adjacent the probe tip for direct ionization of the residue on the belt. The interface is also capable of being readily adapted to fit any mass spectrometer. 8 figs.

Andresen, B.D.; Fought, E.R.

1989-09-19T23:59:59.000Z

90

Systematic Optimization of Long Gradient Chromatography Mass Spectrometry for Deep Analysis of Brain Proteome  

Science Journals Connector (OSTI)

The development of high-resolution liquid chromatography (LC) is essential for improving the sensitivity and throughput of mass spectrometry (MS)-based proteomics. Here we present systematic optimization of a long gradient LC–MS/MS platform to enhance ...

Hong Wang; Yanling Yang; Yuxin Li; Bing Bai; Xusheng Wang; Haiyan Tan; Tao Liu; Thomas G. Beach; Junmin Peng; Zhiping Wu

2014-12-02T23:59:59.000Z

91

HPLC of Anthraquinone in Wood Pulps  

Science Journals Connector (OSTI)

......anthraquinone content: Analysis of pulp and paper-type materials and pulping liquors by gas chromatography/mass spectrometry. Tappi 62(8): 73-76 (1979). 2. J.O. Broenstad, K.H. Schroeder, and H.D. Friestad. Determina- tion of trace amounts......

K.H. Nelson; D. Schram

1983-05-01T23:59:59.000Z

92

Chromatography 50 Chem 355 Jasperse Chromatography  

E-Print Network [OSTI]

technique for the separation and purification of both solids and liquids on relatively small scale (ideally quantities of material (as little as 10-9 g). This is one of the four major purification techniques surface binds polar organics · Biochemistry o Size exclusion: surface pores can fit small molecules

Jasperse, Craig P.

93

Understanding the importance of the viscosity contrast between the sample solvent plug and the mobile phase and its potential consequences in two-dimensional high-performance liquid chromatography  

SciTech Connect (OSTI)

The effect of solvent viscosity mismatch on elution performance in reversed-phase HPLC was studied using moment analysis. Two conditions were tested: (1) the mobile phase viscosity was less than the injection plug viscosity, and (2) the mobile phase viscosity was greater than the injection plug viscosity. Under the first condition, retention time and elution performance decreased as the viscosity contrast between the mobile phase and injection plug increased. The effect on performance was more marked as the injection volume increased. A decrease in performance of 12% for compounds with retention factors up to 2.8 was apparent even when the viscosity contrast was only 0.165 cP. In the second set of conditions, elution performance was actually observed to increase, by as much as 25% for a 40 {micro}L injection, as the viscosity contrast between the mobile phase and the solute plug increased. No change in the retention factor was observed. This behaviour was attributed to the shape of an injection plug as it enters into the column, whereby a low viscosity plug permeates away from the wall when the column contains a higher viscosity mobile phase, and vice a versa for a high viscosity plug entering a low viscosity mobile phase. At no stage was either a band splitting or shoulders observed with viscosity contrasts up to 1.283 cP, as could have been expected.

Shalliker, R. Andrew [University of Western Sydney, Australia; Guiochon, Georges A [ORNL

2009-01-01T23:59:59.000Z

94

A Novel Stationary Phase: Capillary-Channeled Polymer (C-CP) Fibers for HPLC Separations of Proteins  

Science Journals Connector (OSTI)

......Chromatogr. 21: 617 (1998). 14. W.A. Haile and B.M. Phillips. Deep grooved polyester fiber for wet lay applications. Tappi J. 78: 13942 (1995). 15. F.E. Regnier. High-performance liquid chromatography of biopoly- mers. Science 222......

Dwella K. Nelson; R. Kenneth Marcus

2003-10-01T23:59:59.000Z

95

Automated gas chromatography  

DOE Patents [OSTI]

An apparatus and process for the continuous, near real-time monitoring of low-level concentrations of organic compounds in a liquid, and, more particularly, a water stream. A small liquid volume of flow from a liquid process stream containing organic compounds is diverted by an automated process to a heated vaporization capillary where the liquid volume is vaporized to a gas that flows to an automated gas chromatograph separation column to chromatographically separate the organic compounds. Organic compounds are detected and the information transmitted to a control system for use in process control. Concentrations of organic compounds less than one part per million are detected in less than one minute. 7 figs.

Mowry, C.D.; Blair, D.S.; Rodacy, P.J.; Reber, S.D.

1999-07-13T23:59:59.000Z

96

E-Print Network 3.0 - amino acid n-acetylaspartate Sample Search...  

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

by lyophilization. High Pressure Liquid Chromatography (HPLC) Amino acids... , Palo Alto, CA, USA). The amino ... Source: Ecole Polytechnique, Centre de mathmatiques...

97

MagLab - Acronyms  

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

High BT Program HPLC high-performance liquid chromatography ICR Instruments & Tools HTS high temperature superconductor Grain Boundaries I ICP-MS Inductively Coupled Plasma Mass...

98

Dielectrokinetic chromatography devices  

DOE Patents [OSTI]

Disclosed herein are methods and devices for dielectrokinetic chromatography. As disclosed, the devices comprise microchannels having at least one perturber which produces a non-uniformity in a field spanning the width of the microchannel. The interaction of the field non-uniformity with a perturber produces a secondary flow which competes with a primary flow. By decreasing the size of the perturber the secondary flow becomes significant for particles/analytes in the nanometer-size range. Depending on the nature of a particle/analyte present in the fluid and its interaction with the primary flow and the secondary flow, the analyte may be retained or redirected. The composition of the primary flow can be varied to affect the magnitude of primary and/or secondary flows on the particles/analytes and thereby separate and concentrate it from other particles/analytes.

Chirica, Gabriela S; Fiechtner, Gregory J; Singh, Anup K

2014-12-16T23:59:59.000Z

99

Determination of Pentachlorophenol Residue in Meat and Fish by Gas Chromatography–Electron Capture Detection and Gas Chromatography–Mass Spectrometry with Accelerated Solvent Extraction  

Science Journals Connector (OSTI)

......soil (3-4), water (5-7), fish...determined by gas-liquid chromatography...the increasing solubility of analytes at...chromatographically pure grade. Water used in all experiments...methanol (3 mL) and water (3 mL). All...under a stream of nitrogen at 45C. Derivatization...Shimadzu-2010 gas chromatograph......

Dongmei Zhao

2014-01-01T23:59:59.000Z

100

Bibliography and Index of the Literature on Gas Chromatography—1964 November 1, 1963 to November 1, 1964  

Science Journals Connector (OSTI)

......CHROMATOG- RAPHY AND GAS-LIQUID CHROMATOGRA...Meyer, A. S., AEC Report ORNL-3619 for period...May 1964) 215 GAS-LIQUID CHROMATOGRAPHIC...6-DI-tert-BUTYL- p-CRESOL IN TURBINE OILS, Braithwaite...July 1964) 757 GAS CHROMATOGRAPHY OF...Sweeley, C. C., Progress in the Chemistry......

Mignon Gill; Seaton T. Preston; Jr.

1964-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Determination of Memantine in Plasma and Vitreous Humour by HPLC with Precolumn Derivatization and Fluorescence Detection  

Science Journals Connector (OSTI)

......research-article Articles Determination of Memantine in Plasma and Vitreous Humour by HPLC...the internal standard for determining memantine, a candidate agent for the treatment...availability studies. Determination of memantine in plasma and vitreous humour by HPLC......

Belen Puente; Maria Angeles Garcia; Esther Hernandez; Miguel Angel Bregante; Susana Perez; Luis Pablo; Esther Prieto

2011-01-01T23:59:59.000Z

102

Determination of Aromatics in Jet and Diesel Fuels by Supercritical Fluid Chromatography with Flame Ionization Detection (SFC—FID): A Quantitative Study  

Science Journals Connector (OSTI)

......fuels (2). However, these techniques are not generally used in routine analysis because of the high initial capital expenditure and the require ment of highly skilled operators. Liquid chromatography ( L C ) has been used extensively in the......

F.P. Di Sanzo; R.E. Yoder

1991-01-01T23:59:59.000Z

103

High-Performance Liquid Chromatography of Industrial Polyurethane Polyols  

Science Journals Connector (OSTI)

......D.L. Hendrix, R.E. Lee, Jr., J.G. Baust...McFadden and D.R. Scheuing. Determination...L.L. Merritt, Jr., J.A. Dean...Callis, and L.R. Field. Fourier transform...1983). 16. M.E. McNally and L.B. Rogers......

D. Noël; P. VanGheluwe

1987-06-01T23:59:59.000Z

104

A Universal Detector for Liquid Chromatography: The Flame Aerosol Detector  

Science Journals Connector (OSTI)

......a turbu- lent air-hydrogen flame into which the...application of calibration methods similar to those often...of the flame as one method of production of charged droplets...case. In the air-hydrogen flame of a conventional......

Stephen A. Wise; Richard A. Mowery; Jr; Richard S. Juvet; Jr

1979-11-01T23:59:59.000Z

105

Chiral Separations by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......different orientation relative to the silica surface, leads to a quite different selectivity...such as amylose (29), chitosin, xylan, curdlan, dextran, and inulin. The...chiral analytes on chiral chromatographic surfaces, J. Am. Chem. Soc. 110: 334652......

David R. Taylor; Kevin Maher

1992-03-01T23:59:59.000Z

106

Chiral Separations by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......selectors involves their derivatization by treatment with either (+/--)-or (S)-propyle...such as amylose (29), chitosin, xylan, curdlan, dextran, and inulin. The...chiral analytes on chiral chromatographic surfaces, J. Am. Chem. Soc. 110: 334652......

David R. Taylor; Kevin Maher

1992-03-01T23:59:59.000Z

107

Review of Liquid Phases in Gas Chromatography, Part II: Applications  

Science Journals Connector (OSTI)

......reported by Jones (19). B. Poly(ethylene glycol) or PEG PEG is the second most...PEG degrades to form acetaldehyde and ethylene oxide (20,22), and the acetaldehyde...J. Laub, B.H. Luh- mann, A. Price, W . L Roberts, T.J. Shaw, and C......

J.A. Yancey

1994-09-01T23:59:59.000Z

108

A Nitrogen-Selective Detector for Liquid Chromatography  

Science Journals Connector (OSTI)

......Biological Chemistry and Genetics, University of Texas Medical Branch, Galveston, Texas 77550; and ***Moody College of Marine Sciences, Texas A & M University, Galveston, Texas 77550 Abstract Cultured Gymnodinium breve cells......

K.R. Hill; H.L. Crist

1979-07-01T23:59:59.000Z

109

Chiral Separations by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......epoxides 76 Scheme 5. Synthesis of oxazolidone CSP...microcrystalline cellulose tri acetate (CTA) can be used...sparteine-n- butyl lithium catalyst. This led...in stere oselective synthesis coupled with ingenious...methods, Asymmetric Synthesis, 1: 87224 (1983......

David R. Taylor; Kevin Maher

1992-03-01T23:59:59.000Z

110

Detection of Phenolic Carboxylic Acids by Gas-Liquid Chromatography  

Science Journals Connector (OSTI)

......28: 1547 (1964). 2. Greene, G., and Steelink, C., J. Org. Chem., 27: 170 (1962). 3. Hrutfiord, B. F., Tappi, 48: 48 (1965). 4. Ishikawa, Schubert, W. J., and Nord, FE., Arch. Biochem. Biophys., 100: 131 (1963......

J. Mendez; F. J. Stevenson

1966-12-01T23:59:59.000Z

111

Bibliography and Index to the Literature on Gas Chromatography: January 1, 1963 to November 1, 1963  

Science Journals Connector (OSTI)

......405 RETENTION DATA: ANALYSIS OF...CONCENTRATIONS OF HYDROCARBONS, Feldstein...PART I. SLOW COMBUSTION OF ETHYL ACETATE...NAPHTHALENES IN CRUDE HYDROCARBONS BY GAS-LIQUID...ESTERS FROM HEAT-BODIED LINSEED...German) 953 HYDROCARBONS IN THE LOS ANGELES...PEROXIDE BY COMBUSTION-GAS CHROMATOGRAPHY......

Seaton T. Preston; Jr.; Geneva Hyder; Mignon Gill

1963-12-01T23:59:59.000Z

112

Determination of Volatile Compounds in Cider Spirits by Gas Chromatography with Direct Injection  

Science Journals Connector (OSTI)

......described for cider and wine distillates (4,5...used were of analytical quality, of at least 97% purity...liquid chromatography quality) was purchased from...levels of above 1 g/L) increases. Moreover, the life...repercussion on the aromatic quality. Sci. Aliments 22......

Roberto Rodríguez Madrera; Belén Suárez Valles

2007-08-01T23:59:59.000Z

113

Bibliography and Index to the Literature on Gas Chromatography: January 1, 1963 to November 1, 1963  

Science Journals Connector (OSTI)

......1963) 233 INFLUENCE OF HAIR GROWTH CYCLE ON THE TRIGLYCERIDE FATTY ACID COM- POSITION...751 SIMULTANEOUS DETERMINATION OF KREBS CYCLE ACIDS BY GAS-LIQUID CHROMATOGRAPHY...OF HYDROGEN SULPHIDE AROMA IN WINES, Rankine, B. C., J. Sci. Food Agr. 14......

Seaton T. Preston; Jr.; Geneva Hyder; Mignon Gill

1963-12-01T23:59:59.000Z

114

Liquid fossil fuel technology  

SciTech Connect (OSTI)

Progress reports are presented under the following headings: (1) extraction (technology assessment, oil research, gas research); (2) liquid processing (characterization, thermodynamics, processing technology); (3) utilization (energy conservation); and (4) project integration and technology transfer. BETC publications are also listed. Some of the highlights for this period are: the Bartlesville Energy Technology Center was converted into NIPER, the National Institute for Petroleum and Energy Research on October 1, 1983; modelling of enthalpies, heat capacities and volumes of aqueous surfactant solutions began using a mass action model; a series of experiments were run on upgrading by hydrogenation SRC-II coal liquid at different degrees of severity and the products have been analyzed; heavy crude oil extracts were separated into fraction with high performance liquid chromatography by Lawrence Berkeley Laboratory and the mass spectra and electron spin resonance were determin ed; and particulates from exhaust gases of diesel engines using fire fuel types are being collected and will be analyzed by chemical methods and results will be compared with those obtained by biological assay. (ATT)

Not Available

1983-01-01T23:59:59.000Z

115

1980/81 INTERNATIONAL CHROMATOGRAPHY GUIDE:  

Science Journals Connector (OSTI)

......layer chromatography G43 SAMPLE HEATING TABLES G43 SAMPLE INJECTION...Ltd. constant temperature, oil Ace Scientific Supply Company...but with sensitivity and price comparable to a fixed wavelength...Xpectrix International SA SAMPLE HEATING TABLES Jones Chromatography......

1980/81 International Chromatography Guide

1980-02-01T23:59:59.000Z

116

Ethylene Glycol Analysis by Gas Chromatography  

Science Journals Connector (OSTI)

......March-April 1980 research-article Articles Ethylene Glycol Analysis by Gas Chromatography...specific gas chromatographic assay for ethylene glycol was developed. It requires a...accuracy, and precision data are reported. Ethylene glycol analysis by gas chromatography......

Robert O. Bost; I. Sunshine

1980-01-01T23:59:59.000Z

117

EMSL - liquids  

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

liquids en Iodine Solubility in Low-Activity Waste Borosilicate Glass at 1000 °C. http:www.emsl.pnl.govemslwebpublicationsiodine-solubility-low-activity-waste-borosilicate...

118

Trends in Supercritical Fluid Chromatography: 1997  

Science Journals Connector (OSTI)

......chromatographic data for HPLC and...disposal is combustion in large scale...produce less heat (less than 3000 Btu/lb) upon combustion, the resulting...polyaromatic hydrocarbons (PAHs) decreased...column. These combustion products then......

Larry T. Taylor

1997-08-01T23:59:59.000Z

119

High pressure liquid chromatographic method for CP amide analysis  

SciTech Connect (OSTI)

A method has been developed for the analysis of the 5-carboxamidotetrazolatopentaamminecobalt(III) perchlorate contaminant of the explosive CP (2-(5-cyanotetrazolato)-pentaamminecobalt(III) perchlorate). The analysis utilizes a Zn/Hg reduction of the cobalt (III) complexes to allow a high pressure liquid chromatographic (HPLC) analysis of the reaction products; the product analysis is directly related to the weight percent of impurity present in the explosive. The technique is described and shortcomings pointed out.

Loyola, V. M.; Womelsduff, J. E.

1981-02-01T23:59:59.000Z

120

Titanium-Coated Silica Spheres Prepared by Self-Assembly Technique for Use as HPLC Packing  

Science Journals Connector (OSTI)

......for Use as HPLC Packing Jin Ge 1 2 Liang Zhao 1 Li-Ren Chen 1 Yan-Ping Shi 1 * * Author to whom...for Use as HPLC Packing Jin Ge1,2, Liang Zhao1, Li-Ren Chen1, and Yan-Ping Shi1,* 1Key Laboratory...dodecyl sulfate (SDS) from Xi'an Chemical Reagent Co......

Jin Ge; Liang Zhao; Li-Ren Chen; Yan-Ping Shi

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

LNG liquid-liquid immiscibility  

SciTech Connect (OSTI)

Although natural gas species rarely exhibit liquid-liquid immiscibility in binary systems, the presence of additional components can extend the domain of immiscibility in those few binary systems where it already exists or produce immiscibility in binary systems where it had not existed. If the solute has the proper molecular relation to the solvent mixture background, liquid-liquid-vapor (LLV) behavior will occur; such phenomena greatly complicate the design of LNG processing equipment. To aid LNG engineers, researchers mapped the thermodynamic behavior of four ternary LLV systems and examined the effects of the second solvents - ethane, propane, n-butane, and CO/sub 2/ - on the binary methane + n-octane system.

Luks, K.D.; Kohn, J.P.

1981-09-01T23:59:59.000Z

122

Quantitation of Organophosphorus Nerve Agent Metabolites in Human Urine Using Isotope Dilution Gas Chromatography-Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......IL). To use the generator, 132 mg of N-methyl-N...inside tube with 0.5 mL water, and 0.75 mL of ether...ionization efficiency using atmospheric pressure ionization...liquid chromatography-atmospheric pressurechemical ionisation...liter levelsin ground- water.J. Chromatogr.A......

W. Jack Driskell; Ming Shih; Larry L. Needham; Dana B. Barr

2002-01-01T23:59:59.000Z

123

Determination of Organophosphorus Pesticides in Soil by Dispersive Liquid–Liquid Microextraction and Gas Chromatography  

Science Journals Connector (OSTI)

......and 60 mL/min of nitrogen (99.999%) as the auxiliary gas. Nitrogen was used as the carrier gas at a flow rate of 1...aliquot of deionized water was placed into a 10-mL...density than water, a low solubility in water, a high extraction......

Zhonghua Yang; Yu Liu; Donghui Liu; Zhiqiang Zhou

2012-01-01T23:59:59.000Z

124

Innovations in High-Pressure Liquid Injection Technique for Gas Chromatography: Pressurized Liquid Injection System  

Science Journals Connector (OSTI)

......1 min and at the end of the run. Counts Time (min) Figure...Figure 13 shows a chromatogram of straight chain alkanes in hexane ranging...Retention time (min) of compounds Run/compound 1 2 3 4 5 6 7 8 9...obtained for all compounds. Gasoline and diesel in hexane. Heavier......

Jim Luong; Gras Ronda; Richard Tymko

125

Uncertainty in Quantitative Thin-Layer Chromatography  

Science Journals Connector (OSTI)

......and cross-border issues force analysts not only to standardize...uncertainty is developed for fundamental metrological research and is...New York, NY, 1987. 7. Handbook of Thin-Layer Chromatography...New York, NY, 1994. 9. Handbook of Thin-Layer Chromatography......

Mirko Prosek; Alenka Golc-Wondra; Irena Vovk

126

ABSTRACTS OF THE CHROMATOGRAPHY LITERATURE:  

Science Journals Connector (OSTI)

......Ratio Determination of Coal Compounds D. Antenucci...produced during underground coal gasification. and to...understanding the kinetics of the chemistry involved in HDS. The...Analysis of PAC in Fuels, Combustion Emissions and Atmospheric...samples, as diverse as coal liquids, petroleum fuels......

Abstracts of the Chromatography Literature

1999-01-01T23:59:59.000Z

127

Liquid Phases Used in Packed Gas Chromatographic Columns. Part II. Use of Liquid Phases Which Are Not Polysiloxanes  

Science Journals Connector (OSTI)

......as well as trace water, be removed from the carrier gas by using suitable...in the carrier gas lines. There is...bottles out with nitrogen and seal the filled...liquid phases in gas chromatography...Superoxes show low solubility in the common organic......

Joel A. Yancey

1985-08-01T23:59:59.000Z

128

Composition of liquids from coals of different rank  

SciTech Connect (OSTI)

Eight coal liquids prepared from six coals of widely differing rank were compared with respect to their suitability as potential feedstocks for production of refined fuels. The compositions of the liquids were determined by methods adapted from those developed for characterization of petroleum crudes. The coal liquids were prepared and upgraded by hydrogenation in a batch autoclave. The reaction conditions employed were selected to minimize hydrocarbon ring-opening reactions and, at the same time, to produce most of the hydrocarbon liquids potentially available from the coals. The degree of hydrogenation of the raw coal liquids was varied as required to decrease the nitrogen content to about the same level and to provide a predominantly hydrocarbon liquid for analysis. Distilled fractions of the upgraded coal liquids boiling up to 540/sup 0/C were characterized by a combination of separation and analytical techniques including adsorption chromatography; gel permeation chromatography; separations of acids, bases, and asphaltenes; and high- and low-resolution mass spectrometry. In general, the results show that liquids of comparable suitability as feedstocks for production of refined fuels can be produced from coals of different rank.

Sturm, G.P. Jr.; Thomson, J.S.; Woodward, P.W.; Vogh, J.W.

1980-09-01T23:59:59.000Z

129

Freeze chromatography method and apparatus  

DOE Patents [OSTI]

A freeze chromatography method and apparatus are provided which enable separation of the solutes contained in a sample. The apparatus includes an annular column construction comprising cylindrical inner and outer surfaces defining an annular passage therebetween. One of the surfaces is heated and the other cooled while passing an eluent through the annular passageway so that the eluent in contact with the cooled surface freezes and forms a frozen eluent layer thereon. A mixture of solutes dissolved in eluent is passed through the annular passageway in contact with the frozen layer so that the sample solutes in the mixture will tend to migrate either toward or away the frozen layer. The rate at which the mixture flows through the annular passageway is controlled so that the distribution of the sample solutes approaches that at equilibrium and thus a separation between the sample solutes occurs. 3 figs.

Scott, C.D.

1987-04-16T23:59:59.000Z

130

Development and Validation of a Novel RP-HPLC Method for the Analysis of Reduced Glutathione  

Science Journals Connector (OSTI)

......restoring molecules via hydrogen donation, maintaining...N-L-gamma-glutamyl-L-cysteinyl) glycine. Many methods exist for the quantification...Thermostable luciferrases and methods of production. Promega Corporation...Validated reverse phase HPLC method for the determination......

Vijaykumar Sutariya; Daniel Wehrung; Werner J. Geldenhuys

2012-03-01T23:59:59.000Z

131

E-Print Network 3.0 - array fluorescence hplc Sample Search Results  

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

Polypeptides at Amino-Terminal Cysteine Residues Using Cy5-benzyl Thioester Summary: photodiode array absorbance detector. Preparative HPLC was run on a Vydac C4 column (214TP1022,...

132

Validated HPLC Method and Temperature Stabilities for Oil-Soluble Organosulfur Compounds in Garlic Macerated Oil  

Science Journals Connector (OSTI)

......HPLC Method and Temperature Stabilities for Oil-Soluble Organosulfur Compounds in Garlic Macerated Oil Miyoung Yoo Sunyoung Kim Sanghee Lee Dongbin...enhance the utilization of garlic macerated oil as functional foods, oil-soluble organosulfur......

Miyoung Yoo; Sunyoung Kim; Sanghee Lee; Dongbin Shin

2013-11-01T23:59:59.000Z

133

Determination of 5-hydroxymethylfurfural after Winkler and by the HPLC method for authentication of honey  

Science Journals Connector (OSTI)

The quality and authenticity of commercially available honey from Slovak market and the development of HPLC method for determination of hydroxymethylfurfural (HMF) content of honey with fine separation efficie...

K. Kukurova; J. Karovi?ová; G. Greif; Z. Kohajdová; J. Lehkoživová

2006-06-01T23:59:59.000Z

134

Quantification of Underivatized Fatty Acids From Vegetable Oils by HPLC with UV Detection  

Science Journals Connector (OSTI)

......harvest time, extraction processes from fruits or seeds, etc...oils by triacylglyc- erols evaluation of profile using HPLC/ELSD...large-scale manufacturing processes. IIE Transactions 34: 881890...fatty acid methyl esters in biodiesel produced from yellow horn......

V. Guarrasi; M.R. Mangione; V. Sanfratello; V. Martorana; D. Bulone

2010-09-01T23:59:59.000Z

135

Green Solvents in Thin-Layer Chromatography  

Science Journals Connector (OSTI)

In this chapter green solvents used in thin-layer chromatography (TLC) are discussed in detail. These green solvents eradicate or minimize the use of volatile organic solvents and protect the environment from fur...

Ali Mohammad; Inamuddin; Asma Siddiq; Mu. Naushad; Gaber E. El-Desoky

2012-01-01T23:59:59.000Z

136

Antibody Chromatography on an Immunologically Specific Adsorbent  

Science Journals Connector (OSTI)

... in the separation of closely related proteins as of low molecular weight substances, chromatography on adsorbents which bind only to the specific reactive sites of biologically active proteins may help to ...

L. S. LERMAN

1953-10-03T23:59:59.000Z

137

1981/82 INTERNATIONAL CHROMATOGRAPHY GUIDE:  

Science Journals Connector (OSTI)

......spectrophotometry, fluorometry, atomic absorption spectrometry, thin-layer chromatography...control? PolyScience line of Refrigerated Chillers and Constant Temperature Circulators offers this and more Chillers designed for temperatures from below......

1981/82 International Chromatography Guide

1981-02-01T23:59:59.000Z

138

Liquid electrode  

DOE Patents [OSTI]

A dropping electrolyte electrode is described for use in electrochemical analysis of non-polar sample solutions, such as benzene or cyclohexane. The liquid electrode, preferably an aqueous salt solution immiscible in the sample solution, is introduced into the solution in dropwise fashion from a capillary. The electrolyte is introduced at a known rate, thus, the droplets each have the same volume and surface area. The electrode is used in making standard electrochemical measurements in order to determine properties of non-polar sample solutions. 2 figures.

Ekechukwu, A.A.

1994-07-05T23:59:59.000Z

139

Simultaneous analysis method for polar and non-polar ginsenosides in red ginseng by reversed-phase HPLC-PAD  

Science Journals Connector (OSTI)

The paper describes the development of a simultaneous determination method for polar and non-polar ginsenosides in red ginseng with a reversed-phase high-performance liquid chromatography-pulsed amperometric detection method. This method could be applied directly without any pretreatment steps and enabled the performance of highly sensitive analysis within 1 h. The detection (S/N = 3) and quantification (S/N = 10) limits for the ginsenosides ranged 0.02–0.10 ng and 0.1–0.3 ng, respectively. The linear regression coefficients ranged 0.9975–0.9998. Intra- and inter-day precisions were <9.91%. The mean recoveries ranged 98.08–103.06%. The total amount of ginsenosides in the hairy root of red ginseng was higher than that in the main root.

Sa-Im Lee; Ha-Jeong Kwon; Yong-Moon Lee; Je-Hyun Lee; Seon-Pyo Hong

2012-01-01T23:59:59.000Z

140

Production Systems and Processing Effect on Phytochemicals in Citrus Fruits and Their Analytical and Isolation Methods  

E-Print Network [OSTI]

performance liquid chromatography (HPLC) method for the rapid analysis of amines and organic acids was developed. The simultaneous extraction and analysis of samples provides an economical method for analyzing a large number of samples. In the second study...

Uckoo, Ram 1980-

2012-12-13T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Pharmacology and Toxicity of a Potent “Nonclassical” 2,4-Diamino Quinazoline Folate Antagonist, Trimetrexate, in Normal Dogs  

Science Journals Connector (OSTI)

...Trimetrexate and Metabolites Instruments. A modular liquid Chromatograph was constructed...stability of trimetrexate in urine under refrigerator storage con ditions was examined. To...Exclusion Chromatography. Using the modular HPLC system which included 2 UV detectors...

Eleanor C. Weir; Arlene R. Cashmore; Robert N. Dreyer; Michael L. Graham; Nina Hsiao; Barbara A. Moroson; Wendy L. Sawicki; and Joseph R. Bertino

1982-05-01T23:59:59.000Z

142

Ceramide Generation in Response to Photodynamic Treatment of L5178Y Mouse Lymphoma Cells  

Science Journals Connector (OSTI)

...PDT, photodynamic therapy; MB, methylene blue; TB, toluidine blue; IAA, indole-3-acetic acid; LED, light-emitting diode; MOI, 3-methylene-2-oxindole; HPLC, high-performance liquid chromatography. Fig. 1. Pathways involved...

Duska Separovic; Jin He; Nancy L. Oleinick

1997-05-01T23:59:59.000Z

143

Enhancing the Efficacy of Photodynamic Cancer Therapy by Radicals from Plant Auxin (Indole-3-Acetic Acid)  

Science Journals Connector (OSTI)

...PDT, photodynamic therapy; MB, methylene blue; TB, toluidine blue; IAA, indole-3-acetic acid; LED, light-emitting diode; MOI, 3-methylene-2-oxindole; HPLC, high-performance liquid chromatography. Fig. 1. Pathways involved...

Lisa K. Folkes and Peter Wardman

2003-02-15T23:59:59.000Z

144

NEW LITERATURE:  

Science Journals Connector (OSTI)

......Chromatographic News #29" covers HPLC...Instrument Development 81 Gas-Chrom Newsletter...Bio-Rad Laboratories 84 Natural Gas Liquids Analysis Technical...Chromatography Product News Brochure features...ASSOCIATES202 CAMPUS DRIVE ARLINGTON HEIGHTS......

New Literature

1979-06-01T23:59:59.000Z

145

Guidance Document Cryogenic Liquids  

E-Print Network [OSTI]

Guidance Document Cryogenic Liquids [This is a brief and general summary. Read the full MSDS for more details before handling.] Introduction: All cryogenic liquids are gases at normal temperature liquefies them. Cryogenic liquids are kept in the liquid state at very low temperatures. Cryogenic liquids

146

A liquid film motor  

Science Journals Connector (OSTI)

It is well known that electro-hydrodynamical effects in freely suspended liquid films can force liquids to flow. Here, we report a purely electrically driven rotation in water and some other liquid suspended film...

A. Amjadi; R. Shirsavar; N. Hamedani Radja…

2009-05-01T23:59:59.000Z

147

Quantification of Fuel Oxygenate Ethers in Human Blood using Solid-Phase Microextraction Coupled with Gas Chromatography-High-Resolution Mass Spectrometry  

Science Journals Connector (OSTI)

......Because ofwater solubility, fuel oxygenate...toluene. When water supplies are contaminated...followed by gas chromatography-high-resolution...helium-sparged distilled water (26) to produce...blanks,and water standardsfor daily...column carrier gas for all analyses...using liquid nitrogen from Air Liq......

Lalith K. Silva; Clayton R. Wilburn; Michael A. Bonin; Mitchell M. Smith; Katherine A. Reese; David L. Ashley; Benjamin C. Blount

2008-05-01T23:59:59.000Z

148

Rapid Direct Analysis of Acrylamide Residue in Polyacrylamide Thickening Agents by HPLC  

Science Journals Connector (OSTI)

......Laboratories, 905 Sheehy Drive, Horsham, PA, 19044...figures. Chem. Eng. News, June 20, 1988, p...using electron-capture gas chromatography. Analyst...acrylamide monomer in natural and polluted aqueous environ...by electron-capture gas chromatography. J. Chromatogr......

Eldon A. Smith; Frederick W. Oehme

1993-05-01T23:59:59.000Z

149

Oil-Spill Identification by Gas Chromatography-Mass Spectrometry  

Science Journals Connector (OSTI)

...May-June research-article Articles Oil-Spill Identification by Gas Chromatography-Mass Spectrometry...the identification of a contaminant caused by the spilling of oil or oil products in water. A capillary gas chromatography (CGC......

A. Pavlova; D. Papazova

150

Separation of Phenylurea Herbicides by Packed Column Supercritical Fluid Chromatography  

Science Journals Connector (OSTI)

......effects of pressure, mobile phase composition, temperature, and flow rate were...and R. Moulder. Trace analysis of agrochemicals by supercritical fluid chromatography...vented injection in the analysis of agrochemicals by capillary supercritical fluid chromatography......

Terry A. Berger

1994-01-01T23:59:59.000Z

151

Frostbite Theater - Liquid Oxygen vs. Liquid Nitrogen - Liquid Oxygen and  

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

Cells vs. Liquid Nitrogen! Cells vs. Liquid Nitrogen! Previous Video (Cells vs. Liquid Nitrogen!) Frostbite Theater Main Index Next Video (Paramagnetism) Paramagnetism Liquid Oxygen and Fire! What happens when nitrogen and oxygen are exposed to fire? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a test tube of liquid nitrogen! Steve: And this is a test tube of liquid oxygen! Joanna: Let's see what happens when nitrogen and oxygen are exposed to fire. Steve: Fire?! Joanna: Yeah! Steve: Really?! Joanna: Why not! Steve: Okay! Joanna: As nitrogen boils, it changes into nitrogen gas. Because it's so cold, it's denser than the air in the room. The test tube fills up with

152

1981/82 INTERNATIONAL CHROMATOGRAPHY GUIDE:  

Science Journals Connector (OSTI)

......chromatography G41 SAMPLE HEATING TUBES G41 SAMPLE INJECTION...constant temperature, oil Ace Scientific Supply...postage and handling. Prices are in U.S. dollars...other features all at a price comparable to many fixed...International SA SAMPLE HEATING TUBES 890 Chemical Data......

1981/82 International Chromatography Guide

1981-02-01T23:59:59.000Z

153

Plant Drug Analysis by Planar Chromatography  

Science Journals Connector (OSTI)

......during the time required to obtain a start of the elution process. Upon observing that migration was linear with time, it...Planar chromatography has become a modern technique with the commercialization of a large choice of adsorbents and the arrival of automated......

Nicole Galand; Jacques Pothier; Claude Viel

154

Safetygram #9- Liquid Hydrogen  

Broader source: Energy.gov [DOE]

Hydrogen is colorless as a liquid. Its vapors are colorless, odorless, tasteless, and highly flammable.

155

The determination of some anions using ion chromatography and ion chromatography-graphite furnace atomic absorption spectrometry  

E-Print Network [OSTI]

THE DETERMINATION OF SOME ANIONS USING ION CHROMATOGRAPHY AND ION CHROMATOGRAPHY-GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY A Thesis by DANIEL C. J. HILLMAN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1981 Major Subject: Chemistry THE DETERMINATION OF SOME ANIONS USING ION CHROMATOGRAPHY AND ION CHROMATOGRAPHY-GRAPHITE FURNACE ATOMIC ABSORPTION SPECTROMETRY A Thesis by DANIEL C. J. HILLMAN...

Hillman, Daniel C

1981-01-01T23:59:59.000Z

156

Application of a Fluorescent Derivatization Reagent 9-Chloromethyl Anthracene on Determination of Carboxylic Acids by HPLC  

Science Journals Connector (OSTI)

......mL detected on HPLC. Quality control (QC) solutions...indicated a remarkable increase in detection response...intensity and separation quality was achieved by using...liking of bread. Food Quality and Preference (2007...acids in grape juices and wines. Food Research International......

Zhenming Xie; Lin Yu; Huijuan Yu; Qinying Deng

2012-07-01T23:59:59.000Z

157

Liquid level detector  

DOE Patents [OSTI]

A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, Albert P. (Vernon, CT)

1986-01-01T23:59:59.000Z

158

Liquid level detector  

DOE Patents [OSTI]

A liquid level detector for low pressure boilers. A boiler tank, from which vapor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

Grasso, A.P.

1984-02-21T23:59:59.000Z

159

Viscosity, specific (for liquids)  

Science Journals Connector (OSTI)

n. The ratio between the viscosity of a liquid and the viscosity of water at the same temperature. Specific viscosity is sometimes used interchangeably with relative viscosity for liquids.

2007-01-01T23:59:59.000Z

160

Liquid Piston Stirling Engines  

Science Journals Connector (OSTI)

The Fluidyne liquid piston engine is a simple free-piston Stirling engine that can be made from nothing more...

Graham Walker Ph. D.; J. R. Senft Ph.D.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Screening for planar chlorobiphenyl congeners in marine biota by HPLC/PDA  

SciTech Connect (OSTI)

A rapid method has been developed to screen for the dioxin-like planar chlorobiphenyl (CB) congeners, as well as certain other CBs and DDTs, in tissue samples from marine biota. Following extraction, the analytes were separated from interfering compounds on a gravity-flow column packed with acidic, basic and neutral silica gel. Subsequently, the planar CB congeners were resolved from the DDTs and other CBs by HPLC on Cosmosil PYE analytical columns cooled to 9 C and were measured by an ultraviolet (UV) photodiode array (PDA) detector. Individual analytes were identified by comparing their UV spectra and retention to those of reference standards and analyte purity was established by comparing spectra within a peak to the apex spectrum. The HPLC/PDA method was tested with tissue samples from fish, shellfish and marine mammals. Concentrations of the planar CB congeners, as well as certain other CBs and DDTs, in samples determined by screening compared favorably with those in the same samples analyzed by a comprehensive method. The screening method required about 20% of the time needed for the comprehensive analyses. The authors demonstrated the utility of the HPLC/PDA method by determining CBs and DDTs in edible tissue from a variety of seafood species; preliminary results from this survey will be presented.

Krahn, M.M.; Ylitalo, G.M.; Buzitis, J.; Sloan, C.A.; Boyd, D.T.; Chan, S.L.; Varanasi, U. [NOAA/NMFS, Seattle, WA (United States)

1994-12-31T23:59:59.000Z

162

Analysis of Phosphonic Acids: Validation of Semi-Volatile Analysis by HPLC-MS/MS by EPA Method MS999  

SciTech Connect (OSTI)

The Environmental Protection Agency's (EPA) Region 5 Chicago Regional Laboratory (CRL) developed a method titled Analysis of Diisopropyl Methylphosphonate, Ethyl Hydrogen Dimethylamidophosphate, Isopropyl Methylphosphonic Acid, Methylphosphonic Acid, and Pinacolyl Methylphosphonic Acid in Water by Multiple Reaction Monitoring Liquid Chromatography/Tandem Mass Spectrometry: EPA Version MS999. This draft standard operating procedure (SOP) was distributed to multiple EPA laboratories and to Lawrence Livermore National Laboratory, which was tasked to serve as a reference laboratory for EPA's Environmental Reference Laboratory Network (ERLN) and to develop and validate analytical procedures. The primary objective of this study was to validate and verify the analytical procedures described in EPA Method MS999 for analysis of the listed phosphonic acids and surrogates in aqueous samples. The gathered data from this validation study will be used to: (1) demonstrate analytical method performance; (2) generate quality control acceptance criteria; and (3) revise the SOP to provide a validated method that would be available for use during a homeland security event. The data contained in this report will be compiled, by EPA CRL, with data generated by other EPA Regional laboratories so that performance metrics of EPA Method MS999 can be determined.

Owens, J; Vu, A; Koester, C

2008-10-31T23:59:59.000Z

163

Analysis of Ethanolamines: Validation of Semi-Volatile Analysis by HPLC-MS/MS by EPA Method MS888  

SciTech Connect (OSTI)

The Environmental Protection Agency's (EPA) Region 5 Chicago Regional Laboratory (CRL) developed a method titled 'Analysis of Diethanolamine, Triethanolamine, n-Methyldiethanolamine, and n-Ethyldiethanolamine in Water by Single Reaction Monitoring Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS): EPA Method MS888'. This draft standard operating procedure (SOP) was distributed to multiple EPA laboratories and to Lawrence Livermore National Laboratory, which was tasked to serve as a reference laboratory for EPA's Environmental Reference Laboratory Network (ERLN) and to develop and validate analytical procedures. The primary objective of this study was to validate and verify the analytical procedures described in 'EPA Method MS888' for analysis of the listed ethanolamines in aqueous samples. The gathered data from this validation study will be used to: (1) demonstrate analytical method performance; (2) generate quality control acceptance criteria; and (3) revise the SOP to provide a validated method that would be available for use during a homeland security event. The data contained in this report will be compiled, by EPA CRL, with data generated by other EPA Regional laboratories so that performance metrics of 'EPA Method MS888' can be determined.

Owens, J; Vu, A; Koester, C

2008-10-08T23:59:59.000Z

164

Liquid Wall Chambers  

SciTech Connect (OSTI)

The key feature of liquid wall chambers is the use of a renewable liquid layer to protect chamber structures from target emissions. Two primary options have been proposed and studied: wetted wall chambers and thick liquid wall (TLW) chambers. With wetted wall designs, a thin layer of liquid shields the structural first wall from short ranged target emissions (x-rays, ions and debris) but not neutrons. Various schemes have been proposed to establish and renew the liquid layer between shots including flow-guiding porous fabrics (e.g., Osiris, HIBALL), porous rigid structures (Prometheus) and thin film flows (KOYO). The thin liquid layer can be the tritium breeding material (e.g., flibe, PbLi, or Li) or another liquid metal such as Pb. TLWs use liquid jets injected by stationary or oscillating nozzles to form a neutronically thick layer (typically with an effective thickness of {approx}50 cm) of liquid between the target and first structural wall. In addition to absorbing short ranged emissions, the thick liquid layer degrades the neutron flux and energy reaching the first wall, typically by {approx}10 x x, so that steel walls can survive for the life of the plant ({approx}30-60 yrs). The thick liquid serves as the primary coolant and tritium breeding material (most recent designs use flibe, but the earliest concepts used Li). In essence, the TLW places the fusion blanket inside the first wall instead of behind the first wall.

Meier, W R

2011-02-24T23:59:59.000Z

165

Sliding Luttinger liquid phases  

Science Journals Connector (OSTI)

We study systems of coupled spin-gapped and gapless Luttinger liquids. First, we establish the existence of a sliding Luttinger liquid phase for a system of weakly coupled parallel quantum wires, with and without disorder. It is shown that the coupling can stabilize a Luttinger liquid phase in the presence of disorder. We then extend our analysis to a system of crossed Luttinger liquids and establish the stability of a non-Fermi-liquid state: the crossed sliding Luttinger liquid phase. In this phase the system exhibits a finite-temperature, long-wavelength, isotropic electric conductivity that diverges as a power law in temperature T as T?0. This two-dimensional system has many properties of a true isotropic Luttinger liquid, though at zero temperature it becomes anisotropic. An extension of this model to a three-dimensional stack exhibits a much higher in-plane conductivity than the conductivity in a perpendicular direction.

Ranjan Mukhopadhyay; C. L. Kane; T. C. Lubensky

2001-07-09T23:59:59.000Z

166

Exploring the in vitro formation of trimethylarsine sulfide from dimethylthioarsinic acid in anaerobic microflora of mouse cecum using HPLC-ICP-MS and HPLC-ESI-MS  

SciTech Connect (OSTI)

Although metabolism of arsenicals to form methylated oxoarsenical species has been extensively studied, less is known about the formation of thiolated arsenical species that have recently been detected as urinary metabolites. Indeed, their presence suggests that the metabolism of ingested arsenic is more complex than previously thought. Recent reports have shown that thiolated arsenicals can be produced by the anaerobic microflora of the mouse cecum, suggesting that metabolism prior to systemic absorption may be a significant determinant of the pattern and extent of exposure to various arsenic-containing species. Here, we examined the metabolism of {sup 34}S labeled dimethylthioarsinic acid ({sup 34}S-DMTA{sup V}) by the anaerobic microflora of the mouse cecum using HPLC-ICP-MS and HPLC-ESI-MS/MS to monitor for the presence of various oxo- and thioarsenicals. The use of isotopically enriched {sup 34}S-DMTA{sup V} made it possible to differentiate among potential metabolic pathways for production of the trimethylarsine sulfide (TMAS{sup V}). Upon in vitro incubation in an assay containing anaerobic microflora of mouse cecum, {sup 34}S-DMTA{sup V} underwent several transformations. Labile {sup 34}S was exchanged with more abundant {sup 32}S to produce {sup 32}S-DMTA{sup V}, a thiol group was added to yield DMDTA{sup V}, and a methyl group was added to yield {sup 34}S-TMAS{sup V}. Because incubation of {sup 34}S-DMTA{sup V} resulted in the formation of {sup 34}S-TMAS{sup V}, the pathway for its formation must preserve the arsenic-sulfur bond. The alternative metabolic pathway postulated for formation of TMAS{sup V} from dimethylarsinic acid (DMA{sup V}) would proceed via a dimethylarsinous acid (DMA{sup III}) intermediate and would necessitate the loss of {sup 34}S label. Structural confirmation of the metabolic product was achieved using HPLC-ESI-MS/MS. The data presented support the direct methylation of DMTA{sup V} to TMAS{sup V}. Additionally, the detection of isotopically pure {sup 34}S-TMAS{sup V} raises questions about the sulfur exchange properties of TMAS{sup V} in the cecum material. Therefore, {sup 34}S-TMAS{sup V} was incubated and the exchange was monitored with respect to time. The data suggest that the As-S bond associated with TMAS{sup V} is less labile than the As-S bond associated with DMTA{sup V}.

Kubachka, Kevin M. [US EPA, ORD, NERL, Microbiological and Chemical Exposure, Assessment Research Division, Cincinnati, OH 45268 (United States); Kohan, Michael C. [US EPA, ORD, NHEERL, Environmental Carcinogenesis Division, Research Triangle Park, NC 27711 (United States); Herbin-Davis, Karen [US EPA, ORD, NHEERL, Experimental Toxicology Division, Research Triangle Park, NC 27711 (United States); Creed, John T. [US EPA, ORD, NERL, Microbiological and Chemical Exposure, Assessment Research Division, Cincinnati, OH 45268 (United States)], E-mail: creed.jack@epa.gov; Thomas, David J. [US EPA, ORD, NHEERL, Experimental Toxicology Division, Research Triangle Park, NC 27711 (United States)

2009-09-01T23:59:59.000Z

167

Purification of lipoteichoic acid by chromatography in water-organic solvent systems.  

Science Journals Connector (OSTI)

...Research Article Purification of lipoteichoic...chromatography in water-organic solvent...of acyl groups. Purification of lipoteichoic...chromatography in water-organic solvent...for Microbiology Purification of Lipoteichoic...Chromatography in Water-Organic Solvent...

S L Josephson; M W Stinson; S J Millar; R E Cohen

1986-02-01T23:59:59.000Z

168

Size-Exclusion Chromatography in Structural Analysis of Intrinsically Disordered Proteins  

Science Journals Connector (OSTI)

Gel-filtration chromatography, also known as size-exclusion chromatography (SEC) or gel-permeation chromatography, is a useful tool for structural and conformational analyses of intrinsically disordered proteins ...

Vladimir N. Uversky

2012-01-01T23:59:59.000Z

169

The History of Ion Chromatography: The Engineering Perspective  

Science Journals Connector (OSTI)

The History of Ion Chromatography: The Engineering Perspective ... Nonetheless, the engineering community must often remind these highly dedicated researchers that the original invention is frequently only the tip of the iceberg on the road from origin to commercialization. ... This article traces the history of the engineering development related to the several generations of ion chromatography instruments, columns, suppressers, and software. ...

Barton Evans

2004-09-01T23:59:59.000Z

170

Current Status of High Resolution Column Technology for Gas Chromatography  

Science Journals Connector (OSTI)

......work in high-resolution gas-solid chromatography...developments in high- resolution gas chromatographic column...illary or high-resolution gas chromatography. Of these...column material is its high cost compared to glass columns...re sulting from column production, and requires deactivation......

Mary A. Kaiser; Matthew S. Klee

1986-09-01T23:59:59.000Z

171

Analysis of Carbamate Pesticides by Packed Column Supercritical Fluid Chromatography  

Science Journals Connector (OSTI)

......oxamyl. 1 8 2 Figure 5. The effect of composition (% methanol in carbon dioxide) on...and R. Moulder. Trace anal ysis of agrochemicals by supercritical fluid chromatography...vented injection in the analysis of agrochemicals by capillary supercritical fluid chromatography......

Terry A. Berger; William H. Wilson; Jerome F. Deye

1994-05-01T23:59:59.000Z

172

Liquid level detector  

DOE Patents [OSTI]

A liquid level detector for conductive liquids for vertical installation in a tank, the detector having a probe positioned within a sheath and insulated therefrom by a seal so that the tip of the probe extends proximate to but not below the lower end of the sheath, the lower end terminating in a rim that is provided with notches, said lower end being tapered, the taper and notches preventing debris collection and bubble formation, said lower end when contacting liquid as it rises will form an airtight cavity defined by the liquid, the interior sheath wall, and the seal, the compression of air in the cavity preventing liquid from further entry into the sheath and contact with the seal. As a result, the liquid cannot deposit a film to form an electrical bridge across the seal.

Tshishiku, Eugene M. (Augusta, GA)

2011-08-09T23:59:59.000Z

173

Ultrasonic liquid level detector  

DOE Patents [OSTI]

An ultrasonic liquid level detector for use within a shielded container, the detector being tubular in shape with a chamber at its lower end into which liquid from in the container may enter and exit, the chamber having an ultrasonic transmitter and receiver in its top wall and a reflector plate or target as its bottom wall whereby when liquid fills the chamber a complete medium is then present through which an ultrasonic wave may be transmitted and reflected from the target thus signaling that the liquid is at chamber level.

Kotz, Dennis M. (North Augusta, SC); Hinz, William R. (Augusta, GA)

2010-09-28T23:59:59.000Z

174

Hand portable thin-layer chromatography system  

DOE Patents [OSTI]

A hand portable, field-deployable thin-layer chromatography (TLC) unit and a hand portable, battery-operated unit for development, illumination, and data acquisition of the TLC plates contain many miniaturized features that permit a large number of samples to be processed efficiently. The TLC unit includes a solvent tank, a holder for TLC plates, and a variety of tool chambers for storing TLC plates, solvent, and pipettes. After processing in the TLC unit, a TLC plate is positioned in a collapsible illumination box, where the box and a CCD camera are optically aligned for optimal pixel resolution of the CCD images of the TLC plate. The TLC system includes an improved development chamber for chemical development of TLC plates that prevents solvent overflow.

Haas, Jeffrey S. (San Ramon, CA); Kelly, Fredrick R. (Modesto, CA); Bushman, John F. (Oakley, CA); Wiefel, Michael H. (La Honda, CA); Jensen, Wayne A. (Livermore, CA)

2000-01-01T23:59:59.000Z

175

Method to study fracture fluid polymer degradation using size exclusion chromatography. [Size exclusion chromatography  

SciTech Connect (OSTI)

A Size Exclusion Chromatography system is described which can be used to study conditions affecting the degradation of fracturing fluid polymers. In general, the effects of breaker type and concentration, temperature, and other additives to the fracturing fluid system can be monitored using this technique. Identification of effective conditions for polymer degradation may result in better design of fracturing fluids in order to minimize fracture and formation damage. 18 references, 20 figures, 6 tables.

Gall, B.L.; Raible, C.J.

1984-02-01T23:59:59.000Z

176

Reversed-Phase HPLC from pH 1 to 13  

Science Journals Connector (OSTI)

......columns, or the addition of ionic surfactants...advan- tages of ion suppression...measured before addition of the organic...method is by ion exclusion chromatography...using a cation exchange resin and dilute acid...therefore, this demonstration of area ratioing......

Dan Peter Lee

1982-05-01T23:59:59.000Z

177

Liquid heat capacity lasers  

DOE Patents [OSTI]

The heat capacity laser concept is extended to systems in which the heat capacity lasing media is a liquid. The laser active liquid is circulated from a reservoir (where the bulk of the media and hence waste heat resides) through a channel so configured for both optical pumping of the media for gain and for light amplification from the resulting gain.

Comaskey, Brian J. (Walnut Creek, CA); Scheibner, Karl F. (Tracy, CA); Ault, Earl R. (Livermore, CA)

2007-05-01T23:59:59.000Z

178

Carbon monoxide absorbing liquid  

SciTech Connect (OSTI)

The present disclosure is directed to a carbon monoxide absorbing liquid containing a cuprous ion, hydrochloric acid and titanum trichloride. Titanium trichloride is effective in increasing the carbon monoxide absorption quantity. Furthermore, titanium trichloride remarkably increases the oxygen resistance. Therefore, this absorbing liquid can be used continuously and for a long time.

Arikawa, Y.; Horigome, S.; Kanehori, K.; Katsumoto, M.

1981-07-07T23:59:59.000Z

179

Precision liquid level sensor  

DOE Patents [OSTI]

A precision liquid level sensor utilizes a balanced R. F. bridge, each arm including an air dielectric line. Changes in liquid level along one air dielectric line imbalance the bridge and create a voltage which is directly measurable across the bridge.

Field, Michael E. (Albuquerque, NM); Sullivan, William H. (Albuquerque, NM)

1985-01-01T23:59:59.000Z

180

Liquid Fuels Market Module  

U.S. Energy Information Administration (EIA) Indexed Site

Liquid Fuels Market Module Liquid Fuels Market Module This page inTenTionally lefT blank 145 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook 2013 Liquid Fuels Market Module The NEMS Liquid Fuels Market Module (LFMM) projects petroleum product prices and sources of supply for meeting petroleum product demand. The sources of supply include crude oil (both domestic and imported), petroleum product imports, unfinished oil imports, other refinery inputs (including alcohols, ethers, esters, corn, biomass, and coal), natural gas plant liquids production, and refinery processing gain. In addition, the LFMM projects capacity expansion and fuel consumption at domestic refineries. The LFMM contains a linear programming (LP) representation of U.S. petroleum refining

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Reading Comprehension - Liquid Nitrogen  

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

Liquid Nitrogen Liquid Nitrogen Nitrogen is the most common substance in Earth's _________ crust oceans atmosphere trees . In the Earth's atmosphere, nitrogen is a gas. The particles of a gas move very quickly. They run around and bounce into everyone and everything. The hotter a gas is, the _________ slower faster hotter colder the particles move. When a gas is _________ cooled warmed heated compressed , its particles slow down. If a gas is cooled enough, it can change from a gas to a liquid. For nitrogen, this happens at a very _________ strange warm low high temperature. If you want to change nitrogen from a gas to a liquid, you have to bring its temperature down to 77 Kelvin. That's 321 degrees below zero _________ Kelvin Celsius Centigrade Fahrenheit ! Liquid nitrogen looks like water, but it acts very differently. It

182

Development of Dual-Electrode Amperometric Detectors for Liquid Chromatography and Capillary Electrophoresis  

E-Print Network [OSTI]

be operated in either a redox cycling mode or dual–potential mode, where either chemical reversibility or voltammetry could be used as a means to confirm migration based peak identification, respectively. The same design was then applied for a dual Au/Hg...

Dorris, Megan

2013-05-31T23:59:59.000Z

183

Direct Screening of Urine for MDMA and MDA by Liquid Chromatography-Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......Anglim, and C.J.Least,Jr. Improved determination...Rittner, F. Pragst, W.-R. Bork, and J. Neumann...1995). 16. H. Zhao, R. Brenneisen,A. Scholer, A.J.McNally, M.A. ElSohly, T.R Murphy, and S.J.Salamone......

Helena K. Nordgren; Olof Beck

184

E-Print Network 3.0 - anion-exchange liquid chromatography Sample...  

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

Macro-Prep Q supports or Econo-Pac Q cartridges Serum proteins Affi-Gel blue gel... removal Antibody purification Bio-Gel P-6DG gel Dilute protein CM Bio-Gel A gel Weak ......

185

An ASTM Standard Practice for Testing Fixed-Wavelength Photometric Detectors Used in Liquid Chromatography  

Science Journals Connector (OSTI)

......Gas Chromatographic Analysis of Carbendazim from a Flash-Heater Reaction with Trimethylanilinium Hydroxide -- Leonard Ogierman...Chromatographic Determination of Indoles in Human Mouth Saliva Using a Flameless Alkali Sensitized Detector (Nitrogen Phosphorus-Specific......

Thomas Wolf; Georgia T. Fritz; Louis R. Palmer

1981-08-01T23:59:59.000Z

186

Component-Type Analysis of Shale Oil by Liquid and Thin-Layer Chromatography  

Science Journals Connector (OSTI)

......shale oil produced from New Brunswick oil shale in a pilot scale retort is initially...shale oil produced from New Brunswick oil shale in a pilot scale retort is initially...study was produced from New Brunswick oil shale by the New Brunswick Research & Produc......

B.J. Fuhr; L.R. Holloway; C. Reichert; S.K. Barua

1988-02-01T23:59:59.000Z

187

Separation of Aza-Arenes by High-Pressure Liquid Chromatography  

Science Journals Connector (OSTI)

......distillates. Anal. Chem., 48: 891-898 (1976). 11. P.C. Uden and S. Siggia. Composition and analysis of oil shale and shale oil. Presented at Centennial ACS Meeting, New York City, April 7, 1976. (Abstr. Anal. 57) 12. K......

Michael Dong; David C. Locke; Dietrich Hoffmann

1977-01-01T23:59:59.000Z

188

Selectivity Enhancement for Petroleum Hydrocarbons Using a Smectic Liquid Crystalline Stationary Phase in Supercritical Fluid Chromatography  

Science Journals Connector (OSTI)

......Lee* Department of Chemistry, Brigham Young University...Bartle. Analytical Chemistry of Polycyclic Aromatic...Physical and Biological Chemistry. M. Cooke, A.J...hydrocarbon isomers in coal tars and combustion products. Environ......

H-C.K. Chang; K.E. Markides; J.S. Bradshaw; M.L. Lee

1988-06-01T23:59:59.000Z

189

Virulence prediction of Yersinia enterocolitica by pyrolysis gas-liquid chromatography.  

Science Journals Connector (OSTI)

...A2635 invading HeLa cells. This strain was recovered from a carton of the chocolate milk implicated in the 1976, Oneida County, New York, out- break. The dark bacterial rods of Y. enterocolit- ica were unequivocally evident within the inte...

N J Stern; A W Kotula; M D Pierson

1980-09-01T23:59:59.000Z

190

Isolation and Purification of Glycoconjugates from Complex Biological Sources by Recycling High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

Louis, MO) provided 2?,4?,6?-trihydroxyacetophenone monohydrate (THAP), ammonium acetate, ?-mercaptoethanol (?ME), 4-aminobenzamide (4-AB), sodium cyanoborohydride, 4-(2-aminoethyl)aniline, ribonuclease B, ?1-acid glycoprotein (AGP), and bovine fetuin. ... N-Glycanase F (PNGase F) was purchased from Northstar Bioproducts (East Falmouth, MA). ... On the basis of the MS data, the estimated purity for each isomer was greater than 99%. ...

William R. Alley, Jr.; Benjamin F. Mann; Vlastimil Hruska; Milos V. Novotny

2013-09-26T23:59:59.000Z

191

On-Line Process Liquid Exclusion Chromatography Applied to the Production of Styrene-Butadiene Copolymers  

Science Journals Connector (OSTI)

......microparticle silica packing materials for LEC columns (4-8...the older polymer gel materials they appear to be more...addition, the silica materials have the added advantage...development of sample handling and preparation techniques...Experimental A block diagram of the PLEC system is......

E.N. Fuller; G.T. Porter; L.B. Roof

1979-12-01T23:59:59.000Z

192

Determination of Steam-Volatile Organic Acids in Fermentation Media by Gas-Liquid Chromatography  

Science Journals Connector (OSTI)

...research-article Articles Determination of Steam-Volatile Organic Acids in Fermentation...utility in the separation and quantitation of steam-volatile organic acids commonly produced...column of Carbowax 20 M + H3PO4 separated steam-volatile organic acids completely. The...

L. V. Packett; R. W. McCune

1965-01-01T23:59:59.000Z

193

Improvement of Recovery and Repeatability in Liquid Chromatography?Mass Spectrometry Analysis of Peptides  

Science Journals Connector (OSTI)

Pharmaceutical Analysis & Analytical Biochemistry, University Centre for Pharmacy, University of Groningen, A. Deusinglaan 1, 9713 AV Groningen, The Netherlands ...

Paul M. van Midwoud; Laurent Rieux; Rainer Bischoff; Elisabeth Verpoorte; Harm? A. G. Niederländer

2007-01-11T23:59:59.000Z

194

The suitability of semi-continuous liquid chromatography for renal function replacement  

E-Print Network [OSTI]

hemodialysis-HD), has long been the accepted method for managing human metabolic waste levels for those with partial or complete kidney (renal) function loss. So well established is this modality, that it has become routine in hospitals and clinical set..., these results reveal Cl droppino slightly with bicarbonate- buffered HD and remaininc fairly constant wi. th acetate. Noradrena- line levels stayed. Dearly unchanged. Intercompartmental fluid ois? tribution was the factor studied by Schuenerann et -l. (1D...

Blackwell, Gregory Allen

2012-06-07T23:59:59.000Z

195

Pharmacokinetics of Quercetin and Other Flavonols Studied by Liquid Chromatography and LC-MS (a Review)  

Science Journals Connector (OSTI)

Modern analytical methods used to study the pharmacokinetics of quercetin and other flavonols, i.e., biologically active compounds that exhibit various therapeutic properties, were reviewed. The preparation of...

E. B. Guglya

2014-11-01T23:59:59.000Z

196

Determination of Gentian Violet in Animal Feed, Human Urine, and Wastewater by High Pressure Liquid Chromatography  

Science Journals Connector (OSTI)

......conditions) and long-term (storage) stability...equivalents of waste- water) was...analysis of waste- water was...after the spiked waste- water was...short-term and long-term studies. The...17 weeks in storage; whereas......

Larry G. Rushing; Malcolm C. Bowman

1980-05-01T23:59:59.000Z

197

SPECIES DETERMINATION OF ORGANOMETALLIC COMPOUNDS USING ZEEMAN ATOMIC ABSORPTION SPECTROSCOPY WITH LIQUID CHROMATOGRAPHY  

E-Print Network [OSTI]

Compounds Using Zeeman Atomic Absorption Spectroscopy WithCompounds Using Zeeman ,Atomic Absorption Spectroscopy withcapabilities of Zeeman atomic absorption spectroscopy (ZAA)

Koizumi, H.

2011-01-01T23:59:59.000Z

198

Determination of N 1-Methylnicotinamide in Urine by High-Pressure Liquid Chromatography  

Science Journals Connector (OSTI)

......inhibition of carbohydrate metabolism in ascites- tumor cells by ethylene imines. Biochem. J. 63: 300-7 (1956). 10. H. Holzer...1958). 13. V.M. Vivian, M.S. Reynolds, and J.M. Price. Use of ion-exchange resins for the determination of Nl-methylnicotinamide......

Badaruddin Shaikh; Norbert J. Pontzer; Shing-kwan S. Huang; Walter L. Zielinski; Jr.

1977-06-01T23:59:59.000Z

199

On-line Coupling of Solid-Phase Extraction to Liquid Chromatography—A Review  

Science Journals Connector (OSTI)

......of RAM sorbent is extremely long. The price of RAM columns is usually high and frequently exceeds the price of a common ana- lytical column. However...immobilizing BPA anti- bodies on the poly (ethylene dimethacrylate-glycidyl methacry- late......

Ligang Chen; Hui Wang; Qinglei Zeng; Yang Xu; Lei Sun; Haoyan Xu; Lan Ding

2009-09-01T23:59:59.000Z

200

Fundamental Procedures for Determining Ergosterol Content of Decaying Plant Material by Liquid Chromatography  

Science Journals Connector (OSTI)

...University of Georgia Marine Institute. for Spartina...after injection. The detection limit for ergos- terol...photosynthetically available radiation (Li-Cor LI-188B...The biology of marine fungi. Cambridge University...King. 1987. Relation- ship of harvest date and host...

S. Y. Newell; T. L. Arsuffi; R. D. Fallon

1988-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Simultaneous Determination of Thiamine and Riboflavin in Edible Marine Seaweeds by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......which are also involved in energy metabolism (2). The extraction...use by the food industry and consumption by the gen- eral public is...35 for riboflavin, for an average of 18 injections) fell in...Nutrient Data Laboratory Home Page. http://www.nal......

D.I. Sánchez-Machado; J. López-Cervantes; J. López-Hernández; P. Paseiro-Losada

2004-03-01T23:59:59.000Z

202

Characterization and Liquid Chromatography-MS/MS Based Quantification of Hydroxylated Fullerenes  

Science Journals Connector (OSTI)

†School of Sustainable Engineering and The Built Environment, ‡Department of Chemistry and Biochemistry, and §Center for Environmental Biotechnology, The Biodesign Institute at Arizona State University, Arizona State University, Tempe, Arizona 85287, United States ... (1) One particular vision is to engineer nanomaterials that can carry a payload of drugs and other clinically relevant compounds to a target delivery site, e.g., to cancer cells. ... The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIEHS or the National Institutes of Health. ...

Tzu-Chiao Chao; Guixue Song; Nicole Hansmeier; Paul Westerhoff; Pierre Herckes; Rolf U. Halden

2011-02-04T23:59:59.000Z

203

Headspace profiles of modified atmosphere packaged fresh red snapper (Lutjanus campechanus) by gas liquid chromatography  

E-Print Network [OSTI]

activity. Typical components found in the headspace were, butanal, ethanol, hexanal, dimethylamine and trimethylamine. During storage at 4 C, the microbial population within the packages containing C02 tended to shift from an initial gram negative... dioxide (CO2) enriched atmospheres and vacuum packaging have become important new technologies that will improve the quality and shelf-life of fresh seafood products. This type of packaging not only extends the shelf-life of seafoods, it also makes...

Scorah, Craig Darrell Allen

1988-01-01T23:59:59.000Z

204

Palytoxin in seafood by liquid chromatography tandem mass spectrometry: investigation of extraction efficiency and matrix effect  

Science Journals Connector (OSTI)

Blooms of Ostreopsis spp. have been recently reported along the Mediterranean coasts of Spain, France, Italy, and Greece posing serious risks to human health. Occurrence of Ostreopsis...spp. may result in palytox...

Patrizia Ciminiello; Carmela Dell’Aversano…

2011-08-01T23:59:59.000Z

205

Thirtieth anniversary of the retention index according to Kováts in gas-liquid chromatography  

Science Journals Connector (OSTI)

GC retention data measured in various laboratories are given in many different forms and therefore their usefulness is limited. The retention index system according to Kováts solves the problem of the uniform expression of retention data. In this review, the main theoretical and practical results relating to retention index systems published in the past 5 years are summarized.

G. Tarján; Sz. Nyiredy; M. Györ; E.R. Lombosi; T.S. Lombosi; M.V. Budahegyi; S.Y. Mészáros; J.M. Takács

1989-01-01T23:59:59.000Z

206

Improved method of analysis of biomass sugars using high-performance liquid chromatography  

Science Journals Connector (OSTI)

The precise quantitative analysis of biomass derived sugars is a very important step in the conversion of biomass feedstocks to fuels and chemicals. However, the...

F.A. Agblevor; A. Murden; B.R. Hames

2004-08-01T23:59:59.000Z

207

A Commercially Available Dielectric Constant Detector for Liquid Chromatography and Its Applications  

Science Journals Connector (OSTI)

......of trace contaminants. In general, the detector's oscillation...separa- tions that require a general purpose detector, since neither...CHART tPFFn 100 SEC/INCH CYCLE TIME 1500 SECONDS, (25 MINUTES...of polyisobutylene. SAHP1F DIESEL OIL SAMPLE SIZE lOul r.ni......

L.V. Benningfield; Jr.; R.A. Mowery; Jr.

1981-03-01T23:59:59.000Z

208

Drug Screening of Whole Blood by Ultra-Performance Liquid Chromatography-Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......carbonate from BDH Laboratory Supplies (Poole, U.K.). Buffer 1000 media were purchased from MML Diagnostic Packaging (Troutdale, OR), and ChemElute 1-mL supported liquidliquid extraction columns were from Varian. Polypropylene tubes (5 mL) were......

Elisabeth Leere Øiestad; Unni Johansen; Åse Marit Leere Øiestad; Asbjørg Solberg Christophersen

2011-06-01T23:59:59.000Z

209

Peak-Shift Technique in Gas-Liquid Chromatography : Trimethylsilyl Ether Derivatives of Alcohols  

Science Journals Connector (OSTI)

... in Mass Spectrometry. Proc. Joint Conf. by Inst. Petroleum Hydrocarbon Res. Group and ASTM Comm. E-14, edit. by Waldron, J. (Pergamon Press, London 1959) ...

STANLEY H. LANGER; PETER PANTAGES

1961-07-08T23:59:59.000Z

210

Feasibility of Detecting Prostate Cancer by Ultraperformance Liquid Chromatography–Mass Spectrometry Serum Metabolomics  

Science Journals Connector (OSTI)

Alterations in fatty acid metabolism through an enhanced ?-oxidation pathway have been suggested to provide bioenergy for abnormal cell proliferation. ... Centro de Investigaciones en Bionanociencias (CIBION), Consejo Nacional de Investigaciones Cient??ficas y Técnicas (CONICET), Godoy Cruz 2390, C1425FQD, Ciudad de Buenos Aires, Argentina. ...

Xiaoling Zang; Christina M. Jones; Tran Q. Long; María Eugenia Monge; Manshui Zhou; L. DeEtte Walker; Roman Mezencev; Alexander Gray; John F. McDonald; Facundo M. Fernández

2014-06-12T23:59:59.000Z

211

E-Print Network 3.0 - adsorption liquid chromatography Sample...  

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

the recent progress achieved in the understanding... of the adsorption mechanism of fluids in highly ordered mesoporous materials with simple pore ... Source: Greenaway, Alan...

212

Determination of Caffeine and Sympathomimetic Alkaloids in Weight Loss Supplements by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......phases used here without UV absorbing composition. By increasing the concentration of...of organic to aqueous mobile phase compositions. Compared to conventional C18 columns...Handbook of Residue Analytical Methods for Agrochemicals, Volumes 1-2, P.W. Lee, Ed......

Ronald L. Evans; Paul H. Siitonen

2008-01-01T23:59:59.000Z

213

Distillation of liquid fuels by thermogravimetry  

SciTech Connect (OSTI)

In this paper, design and operation of a custom-built thermogravimetric apparatus for the distillation of liquid fuels are reported. Using a sensitive balance with scale of 0.001 g and ASTM distillation glassware, several petroleum and petroleum-derived samples have been analyzed by the thermogravimetric distillation method. When the ASTM distillation glassware is replaced by a micro-scale unit, sample size could be reduced from 100 g to 5-10 g. A computer program has been developed to transfer the data into a distillation plot, e.g. Weight Percent Distilled vs. Boiling Point. It also generates a report on the characteristic distillation parameters, such as, IBP (Initial Boiling Point), FBP (Final Boiling Point), and boiling point at 50 wt% distilled. Comparison of the boiling point distributions determined by TG (thermogravimetry) with those by SimDis GC (Simulated-Distillation Gas Chromatography) on two liquid fuel samples (i.e. a decanted oil and a filtered crude oil) are also discussed in this paper.

Huang, He; Wang, Keyu; Wang, Shaojie; Klein, M.T.; Calkins, W.H.

1996-12-31T23:59:59.000Z

214

Air Liquide - Biogas & Fuel Cells  

Broader source: Energy.gov (indexed) [DOE]

Liquide - Biogas & Fuel Cells Hydrogen Energy Biogas Upgrading Technology 12 June 2012 Charlie.Anderson@airliquide.com 2 Air Liquide, world leader in gases for industry,...

215

Sandia National Laboratories: ionic liquid  

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

liquid Biofuels Blend Right In: Researchers Show Ionic Liquids Effective for Pretreating Mixed Blends of Biofuel Feedstocks On February 26, 2013, in Biofuels, Biomass, Energy,...

216

Liquid sampling system  

DOE Patents [OSTI]

A conduit extends from a reservoir through a sampling station and back to the reservoir in a closed loop. A jet ejector in the conduit establishes suction for withdrawing liquid from the reservoir. The conduit has a self-healing septum therein upstream of the jet ejector for receiving one end of a double-ended cannula, the other end of which is received in a serum bottle for sample collection. Gas is introduced into the conduit at a gas bleed between the sample collection bottle and the reservoir. The jet ejector evacuates gas from the conduit and the bottle and aspirates a column of liquid from the reservoir at a high rate. When the withdrawn liquid reaches the jet ejector the rate of flow therethrough reduces substantially and the gas bleed increases the pressure in the conduit for driving liquid into the sample bottle, the gas bleed forming a column of gas behind the withdrawn liquid column and interrupting the withdrawal of liquid from the reservoir. In the case of hazardous and toxic liquids, the sample bottle and the jet ejector may be isolated from the reservoir and may be further isolated from a control station containing remote manipulation means for the sample bottle and control valves for the jet ejector and gas bleed. 5 figs.

Larson, L.L.

1984-09-17T23:59:59.000Z

217

Liquid sampling system  

DOE Patents [OSTI]

A conduit extends from a reservoir through a sampling station and back to the reservoir in a closed loop. A jet ejector in the conduit establishes suction for withdrawing liquid from the reservoir. The conduit has a self-healing septum therein upstream of the jet ejector for receiving one end of a double-ended cannula, the other end of which is received in a serum bottle for sample collection. Gas is introduced into the conduit at a gas bleed between the sample collection bottle and the reservoir. The jet ejector evacuates gas from the conduit and the bottle and aspirates a column of liquid from the reservoir at a high rate. When the withdrawn liquid reaches the jet ejector the rate of flow therethrough reduces substantially and the gas bleed increases the pressure in the conduit for driving liquid into the sample bottle, the gas bleed forming a column of gas behind the withdrawn liquid column and interrupting the withdrawal of liquid from the reservoir. In the case of hazardous and toxic liquids, the sample bottle and the jet ejector may be isolated from the reservoir and may be further isolated from a control station containing remote manipulation means for the sample bottle and control valves for the jet ejector and gas bleed.

Larson, Loren L. (Idaho Falls, ID)

1987-01-01T23:59:59.000Z

218

Simultaneous HPLC Determination of Tocopherols, Carotenoids, and Chlorophylls for Monitoring Their Effect on Virgin Olive Oil Oxidation  

Science Journals Connector (OSTI)

Although many papers exist on the HPLC analysis of each category of components separately or of carotenoids in the presence of either tocopherols or chlorophylls in edible oils (Fraser et al., 1985; Zonta and Stancher, 1987; Stancher et al., 1987; Rahmani and Csallany, 1991; Endo et al., 1992; Mínguez-Mosquera et al., 1992; Gandul-Rojas et al., 1996), no reference was found for their parallel monitoring in olive oil or in other edible oils. ... The solvent delivery system consisted of two Marathon IV Series HPLC pumps (Rigas Labs, Thessaloniki, Greece) and a Rheodyne injection valve (model 7125) with a 20 ?L fixed loop (Rheodyne, Cotati, CA). ...

Eleni Psomiadou; Maria Tsimidou

1998-11-06T23:59:59.000Z

219

Liquid-level detector  

DOE Patents [OSTI]

Aliquid level sensor is described which has a pair of upright conductors spaced by an insulator defining a first high resistance path between the conductors. An electrically conductive path is interposed between the upright conductors at a discrete location at which liquid level is to be measured. It includes a liquid accessible gap of a dimension such that the electrical resistance across the conductor when the gap is filled with the liquid is detectably less than when the gap is emptied. The conductor might also be physically altered by temperature changes to serve also as an indicator of elevated temperature.

Not Available

1981-01-29T23:59:59.000Z

220

Liquid metal electric pump  

DOE Patents [OSTI]

An electrical pump for pumping liquid metals to high pressures in high temperature environments without the use of magnets or moving mechanical parts. The pump employs a non-porous solid electrolyte membrane, typically ceramic, specific to the liquid metal to be pumped. A DC voltage is applied across the thickness of the membrane causing ions to form and enter the membrane on the electrically positive surface, with the ions being neutralized on the opposite surface. This action provides pumping of the liquid metal from one side of the non-porous solid electrolyte membrane to the other. 3 figs.

Abbin, J.P.; Andraka, C.E.; Lukens, L.L.; Moreno, J.B.

1992-01-14T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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.


221

Determination of O6-Butylguanine in DNA by Immunoaffinity Extraction/Gas Chromatography-Mass Spectrometry  

Science Journals Connector (OSTI)

...high resolution gas chromatography...chromatography; GC. gas chromatography...30 min under a dry nitrogen atmosphere. After...10 ml of distilled water, which was pooled...possible concentration. gas chromatography...their very low buffer solubility, O6MeG, guanosine...

Marina Bonfanti; Cinzia Magagnotti; Alessandra Galli; Renzo Bagnati; Massimo Moret; Pierluigi Gariboldi; Roberto Fanelli; and Luisa Airoldi

1990-11-01T23:59:59.000Z

222

Ethylene Feedstock Characterization by Microscale Pyrolysis/Gas Chromatography  

Science Journals Connector (OSTI)

......January 1978 research-article Articles Ethylene Feedstock Characterization by Microscale...for evaluating naphtha feedstocks for ethylene production and for predicting yields...chromatography and commercial crackers ethylene yields. Ethylene Feedstock Characterization......

M. Greco

1978-01-01T23:59:59.000Z

223

American Instrument Companies and the Early Development of Gas Chromatography  

Science Journals Connector (OSTI)

......continued to be active in gas chromatography and in the...by also building low-cost gas chromatographs. Hamilton...the standard tools of a gas chromatographic laboratory...ultimate in high-precision production: it utilizes the bore......

L.S. Ettre

1977-03-01T23:59:59.000Z

224

Fast quantitation of 5-hydroxymethylfurfural in honey using planar chromatography  

Science Journals Connector (OSTI)

An approach for rapid quantitation of 5-hydroxymethylfurfural (HMF) in honey using planar chromatography...r, of???0.9997 for peak areas and???0.9996 for peak heights. Repeatability in the matrix confirmed the su...

Elena S. Chernetsova; Igor A. Revelsky…

2011-07-01T23:59:59.000Z

225

Thin layer chromatography residue applicator sampler  

DOE Patents [OSTI]

A thin layer chromatograph residue applicator sampler. The residue applicator sampler provides for rapid analysis of samples containing high explosives, chemical warfare, and other analyses of interest under field conditions. This satisfied the need for a field-deployable, small, hand-held, all-in-one device for efficient sampling, sample dissolution, and sample application to an analytical technique. The residue applicator sampler includes a sampling sponge that is resistant to most chemicals and is fastened via a plastic handle in a hermetically sealed tube containing a known amount of solvent. Upon use, the wetted sponge is removed from the sealed tube and used as a swiping device across an environmental sample. The sponge is then replaced in the hermetically sealed tube where the sample remains contained and dissolved in the solvent. A small pipette tip is removably contained in the hermetically sealed tube. The sponge is removed and placed into the pipette tip where a squeezing-out of the dissolved sample from the sponge into the pipette tip results in a droplet captured in a vial for later instrumental analysis, or applied directly to a thin layer chromatography plate for immediate analysis.

Nunes, Peter J. (Danville, CA); Kelly, Fredrick R. (Modesto, CA); Haas, Jeffrey S. (San Ramon, CA); Andresen, Brian D. (Livermore, CA)

2007-07-24T23:59:59.000Z

226

Renewable Liquid Fuels Reforming  

Broader source: Energy.gov [DOE]

The Program anticipates that distributed reforming of biomass-derived liquid fuels could be commercial during the transition to hydrogen and used in the mid- and long-term time frames.

227

Frostbite Theater - Liquid Nitrogen Experiments - Dry Ice vs. Liquid  

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

Egg + Liquid Nitrogen + Time-lapse! Egg + Liquid Nitrogen + Time-lapse! Previous Video (Egg + Liquid Nitrogen + Time-lapse!) Frostbite Theater Main Index Next Video (Liquid Nitrogen Cooled Dry Ice in Water!) Liquid Nitrogen Cooled Dry Ice in Water! Dry Ice vs. Liquid Nitrogen! Dry ice is cold. Liquid nitrogen is cold, too. What happens when the two are mixed together? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Have you ever wondered what happens when you mix dry ice and liquid nitrogen? Steve: Well, we just happen to have a chunk of dry ice left over from when we filmed 'How to Make a Cloud Chamber,' and here at Jefferson Lab, liquid nitrogen flows like water, so we're going to find out!

228

A High-Performance Liquid Chromatographic-Atmospheric Pressure Chemical Ionization-Tandem Mass Spectrometric Method for Determination of Risperidone and 9-Hydroxyrisperidone in Human Plasma  

Science Journals Connector (OSTI)

......Chromatographic-Atmospheric Pressure Chemical...9-Hydroxyrisperidone in Human Plasma David E. Moody...spec- trometry and atmospheric pressure chemical...or polar drugs in plasma. Ther. Drug Monit...their metabolites in plasma by liquid chromatography...spectrometry with atmospheric pres- sure chemical......

David E. Moody; John D. Laycock; Wei Huang; Rodger L. Foltz

2004-09-01T23:59:59.000Z

229

Liquid Scintillator Purification  

SciTech Connect (OSTI)

The KamLAND collaboration has studied background requirements and purification methods needed to observe the 7Be neutrino from the sun. First we will discuss the present background situation in KamLAND where it is found that the main background components are 210Pb and 85Kr. It is then described how to purify the liquid scintillator. The present status and results on how to remove 210Pb from the liquid scintillator are discussed. Specifically, the detailed analysis of the effects of distillation and adsorption techniques are presented.

Kishimoto, Y. [Research Center for Neutrino Science, Tohoku University (Japan)

2005-09-08T23:59:59.000Z

230

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen in a  

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

Freeze Liquid Nitrogen! Freeze Liquid Nitrogen! Previous Video (Let's Freeze Liquid Nitrogen!) Frostbite Theater Main Index Next Video (Freeze the Rainbow!) Freeze the Rainbow! Liquid Nitrogen in a Microwave! What happens when the world's most beloved cryogenic liquid meets one of the most common household appliances? Find out when we try to microwave liquid nitrogen! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: A little while ago we received an email from Star of the Sea Catholic School in Virginia Beach, Virginia, asking what happens when you place liquid nitrogen in a microwave. Well, I just happen to have some liquid nitrogen! Steve: And I just happen to have a microwave!

231

Lyophilic liquid porosimetry and a new liquid autoporosimeter  

SciTech Connect (OSTI)

Lyophilic liquid porosimetry determines the volumes of different size pores by measuring the amount of liquid in these pores, thus, providing pore volume distribution (PVD) data for porous structures. Any liquid that wets the sample may be used. This opens unique opportunities for porous structure evaluation. It provides realistic PVD analysis when the liquid of interest changes the porous structure. It determines uptake/drainage hysteresis of real liquids. It allows direct measurements of uptake and retention capillary pressures with different amounts of liquid in a sample. Lyophilic liquid porosimetry determines liquid/solid contact angles of different size pores within the sample. It can also be used for PVD analysis of both soft, brittle materials and porous metal materials.

Tyomkin, I. [TRI/Princeton, NJ (United States)

1998-12-31T23:59:59.000Z

232

Viscosity of Liquids  

Science Journals Connector (OSTI)

6 November 1952 research-article Viscosity of Liquids E. N. da C. Andrade The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. www.jstor.org

1952-01-01T23:59:59.000Z

233

The Viscosity of Liquids  

Science Journals Connector (OSTI)

... of momentum between them. In the case of a gas, Maxwell showed how the viscosity can be derived by considering this momentum as being communicated by molecules transferring themselves bodily ... fulfilment of the conditions postulated in Maxwell's treatment, and the fact that while gas viscosity goes up with temperature liquid ...

E. N. DA C. ANDRADE

1930-04-12T23:59:59.000Z

234

Detonation in Liquid Explosives  

Science Journals Connector (OSTI)

... Laboratory, on the initiative of Dr. A. H. Davis, into the process of detonation in explosives, the programme including a photographic study of the ... in explosives, the programme including a photographic study of the detonation Waves in transparent liquid explosives—the sensitivity of some of which can be varied by ...

D. CRONEY

1948-09-25T23:59:59.000Z

235

Liquid Natural Gas  

Science Journals Connector (OSTI)

Liquid Natural Gas ... IN A new technique for storing natural gas at the East Ohio Gas Co. plant, Cleveland, Ohio, the gas is liquefied before passing to the gas holders. ... Natural gas contains moisture and carbon dioxide, both of which liquefy before the natural gas and are somewhat of a nuisance because upon solidification they clog the pipes. ...

W. F. SCHAPHORST

1941-04-25T23:59:59.000Z

236

Air Liquide- Biogas & Fuel Cells  

Broader source: Energy.gov [DOE]

Presentation about Air Liquide's biogas technologies and integration with fuel cells. Presented by Charlie Anderson, Air Liquide, at the NREL/DOE Biogas and Fuel Cells Workshop held June 11-13, 2012, in Golden, Colorado.

237

Liquid metal thermal electric converter  

DOE Patents [OSTI]

A liquid metal thermal electric converter which converts heat energy to electrical energy. The design of the liquid metal thermal electric converter incorporates a unique configuration which directs the metal fluid pressure to the outside of the tube which results in the structural loads in the tube to be compressive. A liquid metal thermal electric converter refluxing boiler with series connection of tubes and a multiple cell liquid metal thermal electric converter are also provided.

Abbin, Joseph P. (Albuquerque, NM); Andraka, Charles E. (Albuquerque, NM); Lukens, Laurance L. (Albuquerque, NM); Moreno, James B. (Albuquerque, NM)

1989-01-01T23:59:59.000Z

238

High temperature liquid level sensor  

DOE Patents [OSTI]

A length of metal sheathed metal oxide cable is perforated to permit liquid access to the insulation about a pair of conductors spaced close to one another. Changes in resistance across the conductors will be a function of liquid level, since the wetted insulation will have greater electrical conductivity than that of the dry insulation above the liquid elevation.

Tokarz, Richard D. (West Richland, WA)

1983-01-01T23:59:59.000Z

239

E-Print Network 3.0 - anion-exchange column chromatography Sample...  

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

chromatography Page: << < 1 2 3 4 5 > >> 1 Merck KGaA Life Science Products Darmstadt Germany 11 processing@merck.de www.merck.de Summary: of chromatography Weak anion exchange...

240

Ion Distributions Near a Liquid-Liquid Interface  

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

Ion Distributions Near a Liquid-Liquid Interface Ion Distributions Near a Liquid-Liquid Interface Researchers from the University of Illinois at Chicago; Northern Illinois University; the University of California, Santa Cruz; and ChemMatCARS (sector 15 at the APS) used x-ray reflectivity from ion distributions at the liquid-liquid interface to provide strong evidence that the interfacial structure of a liquid alters the ion distributions near a charged interface, contrary to earlier theories about ions at charged surfaces. Coulomb's Law describes the interaction between two, otherwise isolated, point charges. If many charges are present in the region between these two charges, the net interaction between them is modified. This is commonly found in real systems, such as a plasma gas of electrons and ionized

Note: This page contains sample records for the topic "liquid chromatography hplc" 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.


241

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen and  

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

Freeze the Rainbow! Freeze the Rainbow! Previous Video (Freeze the Rainbow!) Frostbite Theater Main Index Next Video (Liquid Nitrogen and Fire!) Liquid Nitrogen and Fire! Liquid Nitrogen and Antifreeze! What happens when the freezing power of liquid nitrogen meets the antifreezing power of ethylene glycol? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: What happens when the freezing power of liquid nitrogen... Steve: ...meets the antifreezing power of ethylene glycol! Joanna: While a mix of 70 percent ethylene glycol and 30 percent water doesn't freeze until 60 degrees below zero, it's still no match for liquid nitrogen. At 321 degrees below zero, liquid nitrogen easily freezes

242

Frostbite Theater - Liquid Nitrogen Experiments - Let's Freeze Liquid  

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

Shattering Pennies! Shattering Pennies! Previous Video (Shattering Pennies!) Frostbite Theater Main Index Next Video (Liquid Nitrogen in a Microwave!) Liquid Nitrogen in a Microwave! Let's Freeze Liquid Nitrogen! By removing the hottest molecules, we're able to freeze liquid nitrogen! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Today, we're going to freeze liquid nitrogen! Joanna and Steve: Yeah! Joanna: The obvious way to do this is to put the liquid nitrogen into something colder. Something that we have lots of around here! Something like... liquid helium! Steve: Yes! Joanna: Yeah, but we're not going to do that. Instead, we're going to freeze the nitrogen by removing the hottest molecules!

243

A New Method for the Preparation of Adsorbents for Chromatography  

Science Journals Connector (OSTI)

... THE technique of chromatography, as used at present, is limited to a few adsorbents and usually to non-aqueous systems, due to the difficulty of elution of the ... the difficulty of elution of the adsorbate. However, aqueous systems could be used if adsorbents were available which permitted adsorption and desorption to be controlled by pH. adjustment. This ...

D. E. WEISS

1948-09-04T23:59:59.000Z

244

Determination of Phenolic Constituents of Cigarette Smoke by Gas Chromatography  

Science Journals Connector (OSTI)

......one week under these atmospheric conditions. Preparation...created when 35 ml of water drains from a buret...Low- temperature condensation effec- tively removed...condensables, in- cluding water. Provided reasonable...of gas chromatography recoveries found for the other......

Richard H. Crouse; John W. Garner; Hugh J. O'Neill

1963-02-01T23:59:59.000Z

245

Cryogenic Chiral Chromatography for Rapid Resolution of Drug Candidates  

Science Journals Connector (OSTI)

Cryogenic Chiral Chromatography for Rapid Resolution of Drug Candidates ... The chromatographic resolution of three racemates is presented at temperature areas extending to the cryogenic area, down to ?25 °C. ... Although none of the studied compounds could be completely separated at room temperature, a baseline separation was achieved at cryogenic temperatures. ...

Martti Alkio; Olli Aaltonen; Harri Setälä

2005-09-13T23:59:59.000Z

246

Discovery and Early Development of Non-Suppressed Ion Chromatography  

Science Journals Connector (OSTI)

......charge on cation-exchange materials caused a mixture of the resins...Then the chloromethylated materials were converted into ion exchangers...few months later that year, Bill Rich, the Vice President of...stress corrosion cracking of turbine blades. Ion chromatography......

James S. Fritz; Douglas T. Gjerde

2010-08-01T23:59:59.000Z

247

Determinants of Hospital's Financial Liquidity  

Science Journals Connector (OSTI)

Abstract The purpose of the articles is to identify key factors that may affect the level of hospital's liquidity ratio. We’ve posed four research hypotheses, assuming that, the level of financial liquidity in hospitals depends on several factors (number of beds, annual income per bed, profitability ratios, debt ratio). We’ve found that: 1) there is a positive relationship between debt ratio and liquidity and profitability ratio and liquidity 2) the relationship between the size of the hospital and the financial liquidity is not statistically significant. In the study we’ve use statistical tools: Pearson's correlation coefficient, T-Student's test with Cohran-Cox's correction.

Agnieszka Bem; Katarzyna Pr?dkiewicz; Pawe? Pr?dkiewicz; Paulina Ucieklak-Je?

2014-01-01T23:59:59.000Z

248

Automation of Solid-Phase Microextraction-Gas Chromatography-Mass Spectrometry Extraction of Eucalyptus Volatiles  

Science Journals Connector (OSTI)

......Eucalyptus metabolism Gas Chromatography-Mass...SPME) coupled with gas chromatography (GC...processes involved in the production, emission, and effects...Solid-Phase Microextraction Gas ChromatographyMass Spectrometry...significant savings in time and cost could be realized. In......

Cláudia A. Zini; III; Heather Lord; Eva Christensen; Teotônio F. de Assis; Elina B. Caramão; Janusz Pawliszyn

2002-03-01T23:59:59.000Z

249

Trace Analysis of Diethylstilbestrol [DES] in Animal Chow by Parallel High-Speed Liquid Chromatography, Electron-Capture Gas Chromatography, and Radioassays  

Science Journals Connector (OSTI)

......helium carrier gas flowed at 100...directly into the gas chromatograph...using a 60 C water bath and water...injected for HSLC. Solubility, p-Values...9). The solubility of DES in water at that temperature...stream of dry nitrogen and assaying......

Jimmie R. King; Charles R. Nony; Malcolm C. Bowman

1977-01-01T23:59:59.000Z

250

Trenbolone Acetate and Trenbolone: Trace Analysis in Animal Chow, Wastewater and Human Urine by High Pressure Liquid Chromatography and Electron Capture Gas Chromatography  

Science Journals Connector (OSTI)

......amount of compounds. Gas Chromatographic...containing 5% OV-101 on Gas-Chrom Q (80...the dc mode with a nitrogen carrier gas flow of 160 ml...gas chromatograph. Solubility, p-Values, and...5 ml of distilled water in the manner described......

Claude L. Holder; William M. Blakemore; Malcolm C. Bowman

1979-02-01T23:59:59.000Z

251

Quantal Ising Liquid  

Science Journals Connector (OSTI)

An example is presented of a model of an amorphous quantum mechanical system, a liquid of quantal Ising spins, which can be solved exactly within certain many-body theories. Analytical solutions of the model in mean-field theory are shown to reveal a decrease in the extent of the ferromagnetic region (compared to an equivalent classical system) and the occurrence of some degree of quantum localization. Both phenomena are analyzed as a competition between quantum mechanics and the condensed phase.

Richard M. Stratt

1984-10-01T23:59:59.000Z

252

RHIC The Perfect Liquid  

ScienceCinema (OSTI)

Evidence to date suggests that gold-gold collisions the Relativistic Heavy Ion Collider at Brookhaven are indeed creating a new state of hot, dense matter, but one quite different and even more remarkable than had been predicted. Instead of behaving like a gas of free quarks and gluons, as was expected, the matter created in RHIC's heavy ion collisions appears to be more like a "perfect" liquid.

BNL

2009-09-01T23:59:59.000Z

253

Theory of fermion liquids  

Science Journals Connector (OSTI)

We develop a general theory of fermion liquids in spatial dimensions greater than 1. The principal method, bosonization, is applied to the cases of short- and long-range longitudinal interactions and to transverse gauge interactions. All the correlation funtions of the system may be obtained with the use of a generating functional. Short-range and Coulomb interactions do not destroy the Landau-Fermi fixed point. Non-Fermi liquid fixed points are found, however, in the cases of a super-long-range longitudinal interaction in two dimensions and transverse gauge interactions in two and three spatial dimensions. We consider in some detail the (2+1)-dimensional problem of a Chern-Simons gauge action combined with a longitudinal two-body interaction V(q)??q?y-1, which controls the density, and hence gauge, fluctuations. For y0 the interaction is relevant and the fixed point cannot be accessed by bosonization. Of special importance is the case y=0 (Coulomb interaction), which describes the Halperin-Lee-Read theory of the half-filled Landau level. We obtain the full quasiparticle propagator, which is of a marginal Fermi-liquid form. Using Ward identities, we show that neither the inclusion of nonlinear terms in the fermion dispersion nor vertex corrections alters our results: the fixed point is accessible by bosonization. As the two-point fermion Green’s function is not gauge invariant, we also invetigate the gauge-invariant density response function. Near momentum Q=2kF, in addition to the Kohn anomaly we find other nonanalytic behavior. In the appendies we present a numerical calculation of the spectral function for a Fermi liquid with Landau parameter f0?0. We also show how Kohn’s theorem is satisfied within the bosonization framework.

H.-J. Kwon; A. Houghton; J. B. Marston

1995-09-15T23:59:59.000Z

254

What constitutes a simple liquid?  

E-Print Network [OSTI]

Simple liquids are traditionally defined as many-body systems of classical particles interacting via radially symmetric pair potentials. We suggest that a simple liquid should be defined instead by the property of having strong correlation between virial and potential energy equilibrium fluctuations in the NVT ensemble. There is considerable overlap between the two definitions, but also some notable differences. For instance, in the new definition simplicity is not a property of the intermolecular potential only because a liquid is usually only strongly correlating in part of its phase diagram. Moreover, according to the new definition not all simple liquids are atomic (i.e., with radially symmetric pair potentials) and not all atomic liquids are simple. The main part of the paper motivates the new definition of liquid simplicity by presenting evidence that a liquid is strongly correlating if and only if its intermolecular interactions may be ignored beyond the first coordination shell (FCS). This is demonstrated by NVT simulations of structure and dynamics of 15 atomic and molecular model liquids with a shifted-forces cutoff placed at the first minimum of the radial distribution function. No proof is given that the chemical characterization follows from the strong correlation property, but it is shown to be consistent with the existence of isomorphs in strongly correlating liquids' phase diagram. Finally, we note that the FCS characterization of simple liquids calls into question the basis for standard perturbation theory, according to which the repulsive and attractive forces play fundamentally different roles for the physics of liquids.

Trond S. Ingebrigtsen; Thomas B. Schrøder; Jeppe C. Dyre

2011-11-15T23:59:59.000Z

255

Using comprehensive two-dimensional gas chromatography to explore the geochemistry of the Santa Barbara oil seeps  

SciTech Connect (OSTI)

The development of comprehensive two-dimensional gas chromatography (GC x GC) has expanded the analytical window for studying complex mixtures like oil. Compared to traditional gas chromatography, this technology separates and resolves at least an order of magnitude more compounds, has a much larger signal to noise ratio, and sorts compounds based on their chemical class; hence, providing highly refined inventories of petroleum hydrocarbons in geochemical samples that was previously unattainable. In addition to the increased resolution afforded by GC x GC, the resulting chromatograms have been used to estimate the liquid vapor pressures, aqueous solubilities, octanol-water partition coefficients, and vaporization enthalpies of petroleum hydrocarbons. With these relationships, powerful and incisive analyses of phase-transfer processes affecting petroleum hydrocarbon mixtures in the environment are available. For example, GC x GC retention data has been used to quantitatively deconvolve the effects of phase transfer processes such as water washing and evaporation. In short, the positive attributes of GC x GC-analysis have led to a methodology that has revolutionized the analysis of petroleum hydrocarbons. Overall, this research has opened numerous fields of study on the biogeochemical "?genetics" (referred to as petroleomics) of petroleum samples in both subsurface and surface environments. Furthermore, these new findings have already been applied to the behavior of oil at other seeps as well, for petroleum exploration and oil spill studies.

Reddy, Christopher; Nelson, Robert

2013-03-27T23:59:59.000Z

256

Frostbite Theater - Liquid Nitrogen Experiments - Let's Pour Liquid  

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

Shattering Flowers! Shattering Flowers! Previous Video (Shattering Flowers!) Frostbite Theater Main Index Next Video (Giant Koosh Ball!) Giant Koosh Ball! Let's Pour Liquid Nitrogen on the Floor! Liquid nitrogen?! On the floor?! Who's going to clean that mess up?! See what really happens when one of the world's most beloved cryogenic liquids comes into contact with a room temperature floor. [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: From time to time, we spill a little liquid nitrogen! The reaction we sometimes get is.... Shannon: Did they just pour LIQUID NITROGEN on the FLOOR?!?! Joanna: Yes. Yes we did. Steve: One thing people seem to have a problem with is the mess that liquid

257

Radiation Chemistry of Ionic Liquids  

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

Liquids Liquids James F. Wishart, Alison M. Funston, and Tomasz Szreder in "Molten Salts XIV" Mantz, R. A., et al., Eds.; The Electrochemical Society, Pennington, NJ, (2006) pp. 802-813. [Information about the volume (look just above this link)] Abstract: Ionic liquids have potentially important applications in nuclear fuel and waste processing, energy production, improving the efficiency and safety of industrial chemical processes, and pollution prevention. Successful use of ionic liquids in radiation-filled environments will require an understanding of ionic liquid radiation chemistry. For example, characterizing the primary steps of ionic liquid radiolysis will reveal radiolytic degradation pathways and suggest ways to prevent them or mitigate their effects on the properties of the material

258

Enrichment and Determination of Trace Estradiol in Environmental Water Samples by Hollow-Fiber Liquid-Phase Microextraction Prior to HPLC  

Science Journals Connector (OSTI)

......samples were sur- face water collected from the...immersed in the aqueous water. The extraction...dryness at 90 C under nitrogen gas for about 20 min...were performed in water at an estradiol concentration...should have a low solubility in water and non-volatile......

Haixia Li; Ye Jiang; Yan Liu

2011-10-01T23:59:59.000Z

259

HD gas analysis with Gas Chromatography and Quadrupole Mass Spectrometer  

E-Print Network [OSTI]

A gas analyzer system has been developed to analyze Hydrogen-Deuteride (HD) gas for producing frozen-spin polarized HD targets, which are used for hadron photoproduction experiments at SPring-8. Small amounts of ortho-H$_{2}$ and para-D$_{2}$ gas mixtures ($\\sim$0.01%) in the purified HD gas are a key to realize a frozen-spin polarized target. In order to obtain reliable concentrations of these gas mixtures in the HD gas, we produced a new gas analyzer system combining two independent measurements with the gas chromatography and the QMS. The para-H$_{2}$, ortho-H$_{2}$, HD, and D$_{2}$ are separated using the retention time of the gas chromatography and the mass/charge. It is found that the new gas analyzer system can measure small concentrations of $\\sim$0.01% for the otho-H$_2$ and D$_2$ with good S/N ratios.

T. Ohta; S. Bouchigny; J. -P. Didelez; M. Fujiwara; K. Fukuda; H. Kohri; T. Kunimatsu; C. Morisaki; S. Ono; G. Rouille; M. Tanaka; K. Ueda; M. Uraki; M. Utsuro; S. Y. Wang; M. Yosoi

2011-01-28T23:59:59.000Z

260

The identification of mycoplasma species by gas chromatography  

E-Print Network [OSTI]

( Mem r May 1969 ABSTRACT The Identification of Mycoplasma Species by Gas Chromatography (May 1969) Milton Donald Shult, Jr . , B, S. , Texas Lutheran College Directed by: Dr. R. J. Hidalgo A study was undertaken to characterize the fatty acid... which were isolated from avian, human and bovine sources, respectively . The organisms were propagated in a growth medium pre- pared from identical control lots of commercially avaiable dehydrated broth. The fatty acids of the organisms were assayed...

Shult, Milton Donald

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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.


261

Process for preparing liquid wastes  

DOE Patents [OSTI]

A process for preparing radioactive and other hazardous liquid wastes for treatment by the method of vitrification or melting is provided for.

Oden, Laurance L. (Albany, OR); Turner, Paul C. (Albany, OR); O'Connor, William K. (Lebanon, OR); Hansen, Jeffrey S. (Corvallis, OR)

1997-01-01T23:59:59.000Z

262

FLARE, Fermilab Liquid Argon Experiments  

E-Print Network [OSTI]

Mature technology of Liquid Argon Time Projection Chambers in conjunction with intense neutrino beams constructed at Fermilab offer a broad program of neutrino physics for the next decade.

L. Bartoszek

2004-08-24T23:59:59.000Z

263

Characterization of liquids derived from laboratory coking of decant oil and co-coking of Pittsburgh seam bituminous coal with decant oil  

SciTech Connect (OSTI)

In this study, decant oil and a blend of Pittsburgh seam bituminous coal with decant oil were subjected to coking and co-coking in a laboratory-scale delayed coker. Higher yields of coke and gas were obtained from co-coking than from coking. Coal addition into the feedstock resulted in lighter overhead liquid. GC/MS analyses of gasoline, jet fuel, and diesel show that co-coking of coal/decant oil gave higher quantity aromatic components than that of coking of decant oil alone. Simulated distillation gas chromatography analyses of overhead liquids and GC/MS analyses of vacuum fractions show that when coal was reacted with a decant oil, the coal constituents contributed to the distillable liquids. To address the reproducibility of the liquid products, overhead liquid samples collected at the first, third, and fifth hours of experiments of 6 h duration were evaluated using simulated distillation gas chromatography and {sup 1}H and {sup 13}C NMR. NMR analyses of the liquid products showed that, even though there were slight changes in the {sup 1}H and {sup 13}C spectra, the standard deviation was low for the time-dependent samples. Simulated distillation gas chromatography showed that the yields of refinery boiling range materials (i.e., gasoline, jet fuel, diesel, and fuel oil cuts) were reproducible between runs. Fractionation of the overhead liquids into refinery boiling range materials (gasoline, jet fuel, diesel, fuel oil fractions) showed that the boiling range materials and chemical compositions of fractions were found to be reproducible. 54 refs., 17 tabs.

Omer Gul; Caroline Clifford; Leslie R. Rudnick; Harold H. Schobert [Pennsylvania State University, University Park, PA (United States)

2009-05-15T23:59:59.000Z

264

Colchicine Poisoning: Report of a Fatal Case and Presentation of an HPLC Procedure for Body Fluid and Tissue Analyses  

Science Journals Connector (OSTI)

......France. | Case Reports Journal Article | 0 Gout Suppressants 64-86-8 Colchicine | Adult...Gas Chromatography-Mass Spectrometry Gout Suppressants blood pharmacokinetics poisoning...excreted unchanged by the kidney.Cancer and gout patients eliminate about 4% as unchanged......

Pascal Kintz; Carole Jamey; Antoine Tracqui; Patrice Mangin

1997-01-01T23:59:59.000Z

265

Development and Optimization of a HPLC-DAD Method for the Determination of Diverse Pharmaceuticals in Estuarine Surface Waters  

Science Journals Connector (OSTI)

......3). The wastewater treatment plants (WWTP...raphytandem mass spectrometry...Hydrophilic-Lipophilic Balance) (500 mg...chromatography-tandem mass spectrometry...water and wastewater. TrAC Trends...German sewage treatment plants and rivers...agents) in wastewater and surface...in sewage treatment plant. Talanta...ionisation tandem mass spectrometry......

Tânia Vieira Madureira; Maria João Rocha; Quezia Bezerra Cass; Maria Elizabeth Tiritan

2010-03-01T23:59:59.000Z

266

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen and Fire!  

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

Antifreeze! Antifreeze! Previous Video (Liquid Nitrogen and Antifreeze!) Frostbite Theater Main Index Next Video (Liquid Nitrogen and the Tea Kettle Mystery!) Liquid Nitrogen and the Tea Kettle Mystery! Liquid Nitrogen and Fire! A burning candle is placed in a container of liquid nitrogen! Filmed in front of a live studio audience. Well, they were live when we started... [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Steve: Now, then. I'm a little bit afraid to ask this next question because I think I already know the answer, but is anyone in here feeling a little... dangerous? You're willing to take a chance? Because I am willing to do an experiment they haven't let me do since 'The Incident.' Now, because of the danger, I cannot have a volunteer. I must do this on my

267

A new Diffractometer for Studies of Liquid-Liquid Interfaces  

SciTech Connect (OSTI)

We have designed a novel, dedicated diffractometer for surface x-ray scattering studies of liquid-liquid and liquid-gas interfaces for the PETRA III High Resolution Diffraction Beamline. Using a double crystal beam-tilter in Bragg geometry this new instrument enables reflectivity and grazing incidence diffraction investigations without moving the sample, which is mechanically decoupled from the rest of the diffractometer. This design minimizes external excitation of surface vibrations, a key prerequisite for studies of liquid interfaces. The instrument operates over the energy range 6.4 keV to 30 keV, the higher energy range being optimal for penetration through liquid sample environments. Vertical momentum transfer up to q{sub z} 2.5 A{sup -1} and lateral q{sub ||} up to 4 A{sup -1}will be available.

Murphy, B. M.; Greve, M.; Runge, B.; Koops, C. T.; Elsen, A.; Stettner, J.; Magnussen, O. M. [IEAP, Christian-Albrechts-Universitaet zu Kiel, D-24098 Kiel (Germany); Seeck, O. H. [PETRA III at DESY, Notkestr. 85, D-22603 Hamburg (Germany)

2010-06-23T23:59:59.000Z

268

Frostbite Theater - Liquid Nitrogen Experiments - Cells vs. Liquid  

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

Superconductors! Superconductors! Previous Video (Superconductors!) Frostbite Theater Main Index Next Video (Liquid Oxygen and Fire!) Liquid Oxygen and Fire! Cells vs. Liquid Nitrogen! Let's say you've carelessly dunked your hand into a vat of liquid nitrogen and let it freeze solid. Every movie you've seen where this happens tells you that your hand will shatter like fine china should you bump it into something. If you're extremely careful, will your hand be okay once it thaws out? We'll explore this issue, using flower and onion cells rather than our hands! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: By now, we all know what happens when you place a flower in liquid

269

Chemically authentic surrogate mixture model for the thermophysical properties of a coal-derived liquid fuel  

SciTech Connect (OSTI)

We developed a surrogate mixture model to represent the physical properties of a coal-derived liquid fuel using only information obtained from a gas chromatography-mass spectrometry analysis of the fuel and a recently developed 'advanced distillation curve'. We then predicted the density, speed of sound, and viscosity of the fuel and compared them to limited experimental data. The surrogate contains five components (n-propylcyclohexane, trans-decalin, {alpha}-methyldecalin, bicyclohexane, and n-hexadecane), yet comparisons to limited experimental data demonstrate that the model is able to represent the density, sound speed, and viscosity to within 1, 4, and 5%, respectively. 102 refs., 2 figs., 5 tabs.

M.L. Huber; E.W. Lemmon; V. Diky; B.L. Smith; T.J. Bruno [National Institute of Standards and Technology (NIST), Boulder, CO (United States). Physical and Chemical Properties Division

2008-09-15T23:59:59.000Z

270

Metodologia analítica para determinação de triclosan e clorofenois por cromatografia a líquido de alta eficiência (HPLC) e cromatografia por injeção seqüencial (SIC) com uso de coluna monolítica e empacotada.  

E-Print Network [OSTI]

??Foram desenvolvidas metodologias de cromatografia a líquido de fase reversa baseadas em injeção sequencial (SIC) e em cromatografia a líquido de alta eficiência (HPLC) para… (more)

Ausberta Jesús Cabezas Garcia

2011-01-01T23:59:59.000Z

271

Methods Development for On-Line Gas Chromatography  

Science Journals Connector (OSTI)

......contractual specifications. Used to determine value and sale price of product. Monitors liquid or gas effluent wastes for loss...vinyl chloride on dioctylsebacate and Car- bowax 550. (A) ethylene, (B) propane, (C) propylene, (D) isobutane, (E......

Richard Villalobos

1990-07-01T23:59:59.000Z

272

Enhanced liquid hydrocarbon recovery process  

SciTech Connect (OSTI)

This patent describes a process for recovering liquid hydrocarbons. It comprises: injecting into a fractured subterranean formation a polymer enhanced foam comprising a polymer selected from a synthetic polymer or a biopolymer, a surfactant, an aqueous solvent and a gas, recovering liquid hydrocarbons from the formation.

Sydansk, R.D.

1992-07-14T23:59:59.000Z

273

Orifice mixing of immiscible liquids  

E-Print Network [OSTI]

measured with an Ostwald Viscosimeter relative to tap water also, All of these physical measurements were made at 83c F, the average tempera- ture noted during the runs. The liquid upon which these measurements were made were samples of the liquids...

McDonough, Joseph Aloysius

1960-01-01T23:59:59.000Z

274

Liquid-permeable electrode  

DOE Patents [OSTI]

Electrodes for use in an electrolytic cell, which are liquid-permeable and have low electrical resistance and high internal surface area are provided of a rigid, porous, carbonaceous matrix having activated carbon uniformly embedded throughout. The activated carbon may be catalyzed with platinum for improved electron transfer between electrode and electrolyte. Activated carbon is mixed with a powdered thermosetting phenolic resin and compacted to the desired shape in a heated mold to melt the resin and form the green electrode. The compact is then heated to a pyrolyzing temperature to carbonize and volatilize the resin, forming a rigid, porous structure. The permeable structure and high internal surface area are useful in electrolytic cells where it is necessary to continuously remove the products of the electrochemical reaction.

Folser, George R. (Lower Burrell, PA)

1980-01-01T23:59:59.000Z

275

Magnetically focused liquid drop radiator  

DOE Patents [OSTI]

A magnetically focused liquid drop radiator for application in rejecting energy from a spacecraft, characterized by a magnetizable liquid or slurry disposed in operative relationship within the liquid droplet generator and its fluid delivery system, in combination with magnetic means disposed in operative relationship around a liquid droplet collector of the LDR. The magnetic means are effective to focus streams of droplets directed from the generator toward the collector, thereby to assure that essentially all of the droplets are directed into the collector, even though some of the streams may be misdirected as they leave the generator. The magnetic focusing means is also effective to suppress splashing of liquid when the droplets impinge on the collector.

Botts, T.E.; Powell, J.R.; Lenard, R.

1984-12-10T23:59:59.000Z

276

Freezing of a Liquid Marble  

E-Print Network [OSTI]

In this study, we present for the first time the observations of a freezing liquid marble. In the experiment, liquid marbles are gently placed on the cold side of a Thermo-Electric Cooler (TEC) and the morphological changes are recorded and characterized thereafter. These liquid marbles are noticed to undergo a shape transition from a spherical to a flying-saucer shaped morphology. The freezing dynamics of liquid marbles is observed to be very different from that of a freezing water droplet on a superhydrophobic surface. For example, the pointy tip appearing on a frozen water drop could not be observed for a frozen liquid marble. In the end, we highlight a possible explanation for the observed morphology.

Ali Hashmi; Adam Strauss; Jie Xu

2012-07-03T23:59:59.000Z

277

Method of measuring a liquid pool volume  

DOE Patents [OSTI]

A method of measuring a molten metal liquid pool volume and in particular molten titanium liquid pools, including the steps of (a) generating an ultrasonic wave at the surface of the molten metal liquid pool, (b) shining a light on the surface of a molten metal liquid pool, (c) detecting a change in the frequency of light, (d) detecting an ultrasonic wave echo at the surface of the molten metal liquid pool, and (e) computing the volume of the molten metal liquid.

Garcia, Gabe V. (Las Cruces, NM); Carlson, Nancy M. (Idaho Falls, ID); Donaldson, Alan D. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

278

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen...  

Broader source: Energy.gov (indexed) [DOE]

Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Liquid Hydrogen Delivery - Strategic Directions for Hydrogen Delivery Workshop Targets, barriers and...

279

Delivery of Tea Polyphenols to the Oral Cavity by Green Tea Leaves and Black Tea Extract  

Science Journals Connector (OSTI)

...studies on the effectiveness of green and black tea in the prevention...Chemical Co. (St. Louis, MO). Green tea leaves and black tea solids...liquid chromatography (HPLC) solvents were of the highest grade commercially...volunteers gently chewed 2 g of green tea leaves in the mouth for...

Mao-Jung Lee; Joshua D. Lambert; Saileta Prabhu; Xiaofeng Meng; Hong Lu; Pius Maliakal; Chi-Tang Ho; and Chung S. Yang

2004-01-01T23:59:59.000Z

280

Disruption of Androgen and Estrogen Receptor Activity in Prostate Cancer by a Novel Dietary Diterpene Carnosol: Implications for Chemoprevention  

Science Journals Connector (OSTI)

...quantitatively determined with a thermal energy analyzer. The smoke was trapped...liquid chromatography-thermal energy ana lyzer methodology (sensitivity...nitrosoanatabine; TEA, ther mal energy analyzer; HPLC, high-performance...cigars were purchased on the open market in 1977 and 1978. Experimental...

Jeremy J. Johnson; Deeba N. Syed; Yewseok Suh; Chenelle R. Heren; Mohammad Saleem; Imtiaz A. Siddiqui; and Hasan Mukhtar

2010-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Figure 2. Phase-contrast (A) and corresponding fluorescence (B) micrographs of Astrammina pseudopodia that were first labeled with fluorescein-tagged goat IgG, and then washed free of unbound IgG and fixed. (Arrows denote sites of newly secreted adhesive.  

E-Print Network [OSTI]

G and fixed. (Arrows denote sites of newly secreted adhesive. Bar = 20 micrometers.) (C) High-voltage electron carbon, and particulate organic nitrogen levels. In addition, 15 distinct algal pigments were determined by high-performance liquid chromatography (HPLC),and the algal pigments were classi- fied into groups

Moline, Mark

282

Applications of Extraction Chromatography in the Development of Radionuclide Generator Systems for Nuclear Medicine  

Science Journals Connector (OSTI)

Applications of Extraction Chromatography in the Development of Radionuclide Generator Systems for Nuclear Medicine ... Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439 ...

Mark L. Dietz; E. Philip Horwitz

2000-08-12T23:59:59.000Z

283

E-Print Network 3.0 - anion-exchange chromatography prior Sample...  

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

temperature. 2 12;Table 2. Buffers for Anion-Exchange... and biochemistry and their removal from biological samples. Chromatography Pre-Runs Prior to loading the sample......

284

Methods of analysis modified size exchange chromatography method for analysis of heavy oil residues  

Science Journals Connector (OSTI)

A modified size exchange chromatography method is used to obtain molecular weight distributions, average molecular weight, and other characteristics of heavy oil residues: coal asphalt, petroleum asphalt, vacu...

Changming Zhang; Adnan Alhajji…

2012-09-01T23:59:59.000Z

285

Solvent-vented injection in the analysis of agrochemicals by capillary supercritical fluid chromatography  

Science Journals Connector (OSTI)

Capillary supercritical fluid chromatography was performed with solvent-vented injection. Dilute samples of agrochemical mixtures were chromatographed and a study of detector response vs. quantity injected made.

S. Ashraf; K. D. Bartle; A. A. Clifford; I. L. Davies; R. Moulder

1990-12-01T23:59:59.000Z

286

A Preliminary Study of Oxidation of Lignin from Rubber Wood to Vanillin in Ionic Liquid Medium  

E-Print Network [OSTI]

In this study, lignin was oxidised to vanillin by means of oxygen in ionic liquid (1,3-dimethylimidazolium methylsulphate) medium. The parameters of the oxidation reaction that have been investigated were the following: concentration of oxygen (5, 10, 15 and 20 ft3 h-1), reaction time (2, 4, 6, 8 and 10 h) and reaction temperature (25, 40, 60, 80 and 100{\\deg}C). The Fourier transform infrared spectroscopy, high performance liquid chromatography and ultraviolet-visible analyses were used to characterise the product. The results revealed vanillin as the product obtained via the oxidation reaction. The optimum parameters of vanillin production were 20 ft3 h-1 of oxygen for 10 h at 100{\\deg}C. In conclusion, 1,3-dimethylimidazolium methylsulphate could be used as an oxidation reaction medium for the production of vanillin from rubber wood lignin.

Shamsuri, A A

2013-01-01T23:59:59.000Z

287

Frostbite Theater - Liquid Nitrogen Experiments - Instant Liquid Nitrogen  

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

Freezing Balloons! Freezing Balloons! Previous Video (Freezing Balloons!) Frostbite Theater Main Index Next Video (Shattering Flowers!) Shattering Flowers! Instant Liquid Nitrogen Balloon Party! Need a bunch of balloons blown-up quickly? Liquid nitrogen to the rescue! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: We've been making videos for a while now and we've learned that people like balloons and liquid nitrogen! Steve: So... Here you go! Balloon: Crackling... Balloon: Pop! Joanna: Ooh! Balloon: Pop! Balloon: Pop! Steve: If you'd like to know the science of what's going on behind this, please one of our first videos, "Liquid Nitrogen Experiments: The Balloon."

288

Haze Formation and Behavior in Liquid-Liquid Extraction Processes  

SciTech Connect (OSTI)

Aqueous haze formation and behavior was studied in the liquid-liquid system tri-n-butyl phosphate in odorless kerosene and 3M nitric acid with uranyl nitrate and cesium nitrate representing the major solute and an impurity, respectively. A pulsed column, mixer-settler and centrifugal contactor were chosen to investigate the effect of different turbulence characteristics on the manifestation of haze since these contactors exhibit distinct mixing phenomena. The dispersive processes of drop coalescence and breakage, and water precipitation in the organic phase were observed to lead to the formation of haze drops of {approx}1 um in diameter. The interaction between the haze and primary drops of the dispersion was critical to the separation efficiency of the liquid-liquid extraction equipment. Conditions of high power input and spatially homogeneous mixing enabled the haze drops to become rapidly assimilated within the dispersion to maximize the scrub performance and separation efficiency of the equipment.

Arm, Stuart T.; Jenkins, J. A.

2006-07-31T23:59:59.000Z

289

Molecular Simulation of Henry's Constant at Vapor-Liquid and Liquid-Liquid Phase Richard J. Sadus  

E-Print Network [OSTI]

coexistence. 1. Introduction Henry's constant is a well-known measure of a solute's solubility in a particularMolecular Simulation of Henry's Constant at Vapor-Liquid and Liquid-Liquid Phase Boundaries Richard to determine Henry's constant from the residual chemical potential at infinite dilution at the vapor-liquid

290

The Viscosity of Liquid Helium  

Science Journals Connector (OSTI)

2 September 1935 research-article The Viscosity of Liquid Helium J. O. Wilhelm A. D. Misener A. R. Clark The Royal Society is collaborating with JSTOR to digitize, preserve...

1935-01-01T23:59:59.000Z

291

Liquid Oxygen and its Uses  

Science Journals Connector (OSTI)

... of the liquid. At present, however, there is no known method of rendering them flameless, and their use in the majority of coal-mines is therefore inadmissible. If this ...

HENRY BRIGGS

1924-02-02T23:59:59.000Z

292

Gaseous and Liquid Hydrogen Storage  

Broader source: Energy.gov [DOE]

Today's state of the art for hydrogen storage includes 5,000- and 10,000-psi compressed gas tanks and cryogenic liquid hydrogen tanks for on-board hydrogen storage.

293

Liquid helium cryo TEM | EMSL  

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

cryo TEM Liquid helium cryo TEM The JEOL JEM-3000SFF was designed for high-resolution cryogenic transmission electron microscopy (cryo-EM) of biological samples and expands EMSL...

294

Essays on liquidity and information  

E-Print Network [OSTI]

This dissertation studies the interaction of liquidity and incomplete or asymmetric information. In Chapter 1, I study a dynamic economy with illiquidity due to adverse selection in financial markets. Investment is undertaken ...

Kurlat, Pablo (Pablo Daniel)

2010-01-01T23:59:59.000Z

295

Physical Chemistry of Ionic Liquids  

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

Ionic liquids are experiencing explosive growth in many areas of research Ionic liquids are experiencing explosive growth in many areas of research and practical applications. They present a wide range of complex physical and chemical behaviors, including ambient vapor pressures ranging from UHV to weakly volatile, a substantial variety of distinct condensed phases, including multiple crystal isomorphs, glasses, amorphous plastic and liquid crystal phases, deep supercooling, and interesting dynamical and transport phenomena. Experiments and simulations have shown that their intrinsic self-organization at the nanoscale is responsible for several of these properties. The symposium will assemble an international array of speakers to discuss ionic liquids in the context of their heterogeneous environments, solvation, dynamics and transport, interfacial properties,

296

Ion chromatography in the manufacture of multilayer circuit boards  

SciTech Connect (OSTI)

Ion chromatography (IC) has proven useful in analyzing chemical solutions used in the manufacture of multilayer circuit boards. Unlike other chemical quantification techniques, IC provides results on ions not expected in the production solutions. Thus, solution contamination and break-down products can be monitored in every phase of the circuit board manufacturing. During the first phase, epoxy laminates experience an etchback, first in chromic acid, which can be analyzed for trace chloride and sulfate, then in ammonium bifluoride/HCl, which can be analyzed for fluoride and chloride. Following a wet-blasting to roughen up the surface, 20 microinches of copper are deposited using an electroless bath. Again, IC is applicable for monitoring formate, tartarate, and sulfate levels. Next, an acid copper bath is used to electroplate the through holes with 0.001 inches of ductile copper. This bath is analyzed for trace chloride. Photoimaging is then performed, and the organic solvents used can be assayed for trace ionic chloride. Finally, a fluoroboric acid-based tin-lead bath is used to deposit a solderable alloy. This bath is analyzed for fluoroborate, tin, and lead. In addition, mobile phase ion chromatography (MPIC) is used to monitor the nonionic organic brighteners in the baths. 11 refs., 7 figs.

Smith, R.E.

1990-01-01T23:59:59.000Z

297

Ion chromatography in the manufacture of multilayer circuit boards  

SciTech Connect (OSTI)

Ion chromatography (IC) has proven useful in analyzing chemical solutions used in the manufacture of multilayer circuit boards. IC provides results on ions not expected in the production solutions. Thus solution contamination, and breakdown products can be monitored in every phase of the circuit board manufacturing. During the first phase, epoxy laminates experience an etchback, first in chromic acid, which can be analyzed for trace chloride and sulfate, then in ammonium bifluoride/HCl, which can be analyzed for fluoride and chloride. Following a wet blasting to roughen up the surface, 20 ..mu..in. of copper are deposited using an electroless bath. Again, IC is applicable for monitoring formate, tartarate, and sulfate levels. Next, an acid copper bath is used to electroplate the through holes with 0.001 in. of ductile copper. This bath is analyzed for trace chloride. Photoimaging is then performed, and the organic solvents used can be assayed for trace ionic chloride. Finally, a fluoroboric acid-based tin-lead bath is used to deposit a solderable alloy. This bath is analyzed for total fluoroborate, tin, and lead. In addition, mobile phase ion chromatography (MPIC) is used to monitor the nonionic organic brighteners in the baths. 11 refs., 3 figs.

Smith, R.E.

1987-10-01T23:59:59.000Z

298

Ultratrace detector for hand-held gas chromatography  

DOE Patents [OSTI]

An ultratrace detector system for hand-held gas chromatography having high sensitivity, for example, to emissions generated during production of weapons, biological compounds, drugs, etc. The detector system is insensitive to water, air, helium, argon, oxygen, and C0.sub.2. The detector system is basically composed of a hand-held capillary gas chromatography (GC), an insulated heated redox-chamber, a detection chamber, and a vapor trap. For example, the detector system may use gas phase redox reactions and spectral absorption of mercury vapor. The gas chromatograph initially separates compounds that percolate through a bed of heated mercuric oxide (HgO) in a silica--or other metal--aerogel material which acts as an insulator. Compounds easily oxidized by HgO liberate atomic mercury that subsequently pass through a detection chamber which includes a detector cell, such as quartz, that is illuminated with a 254 nm ultra-violet (UV) mercury discharge lamp which generates the exact mercury absorption bands that are used to detect the liberated mercury atoms. Atomic mercury strongly absorbs 254 nm energy is therefore a specific signal for reducing compounds eluting from the capillary GC, whereafter the atomic mercury is trapped for example, in a silicon-aerogel trap.

Andresen, Brian D. (Livermore, CA); Miller, Fred S. (Bethal Island, CA)

1999-01-01T23:59:59.000Z

299

High-Speed Radiochemical Separations by Liquid-Liquid Chromatography Using a CSP Support. II. Separation of Metal Ions Using Tricaprylmethylammonium Chloride on Zipax  

Science Journals Connector (OSTI)

......were prepared by packing in a vacuum with the stationary phase frozen...performed on the products from accelerator- bombarded targets. The isolation...indicate that a region of enhanced nuclear stability may lie in the atomic...Conclusions The 3- and 5-cm vacuum packed columns contain- ing......

E. P. Horwitz; C. A. A. Bloomquist

1974-04-01T23:59:59.000Z

300

SRS - Programs - Liquid Waste Disposition  

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

Liquid Waste Disposition Liquid Waste Disposition This includes both the solidification of highly radioactive liquid wastes stored in SRS's tank farms and disposal of liquid low-level waste generated as a by-product of the separations process and tank farm operations. This low-level waste is treated in the Effluent Treatment Facility. High-activity liquid waste is generated at SRS as by-products from the processing of nuclear materials for national defense, research and medical programs. The waste, totaling about 36 million gallons, is currently stored in 49 underground carbon-steel waste tanks grouped into two "tank farms" at SRS. While the waste is stored in the tanks, it separates into two parts: a sludge that settles on the bottom of the tank, and a liquid supernate that resides on top of the sludge. The waste is reduced to about 30 percent of its original volume by evaporation. The condensed evaporator "overheads" are transferred to the Effluent Treatment Project for final cleanup prior to release to the environment. As the concentrate cools a portion of it crystallizes forming solid saltcake. The concentrated supernate and saltcake are less mobile and therefore less likely to escape to the environment in the event of a tank crack or leak.

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

PHASE CHANGE LIQUIDS  

SciTech Connect (OSTI)

Work is being performed to develop a new shipping system for frozen environmental samples (or other materials) that uses an optimal phase change liquid (PCL) formulation and an insulated shipping container with an on-board digital temperature data logger to provide a history of the temperature profile within the container during shipment. In previous work, several PCL formulations with temperatures of fusion ranging from approximately -14 to -20 C were prepared and evaluated. Both temperature of fusion and heat of fusion of the formulations were measured, and an optimal PCL formulation was selected. The PCL was frozen in plastic bags and tested for its temperature profile in a cooler using a digital temperature data logger. This testing showed that the PCL formulation can maintain freezer temperatures (< -7 to -20 C) for an extended period, such as the time for shipping samples by overnight courier. The results of the experiments described in this report provide significant information for use in developing an integrated freezer system that uses a PCL formulation to maintain freezer temperatures in coolers for shipping environmental samples to the laboratory. Experimental results show the importance of the type of cooler used in the system and that use of an insulating material within the cooler improves the performance of the freezer system. A new optimal PCL formulation for use in the system has been determined. The new formulation has been shown to maintain temperatures at < -7 to -20 C for 47 hours in an insulated cooler system containing soil samples. These results are very promising for developing the new technology.

Susan S. Sorini; John F. Schabron

2006-03-01T23:59:59.000Z

302

Determination of interaction second virial coefficients for the CO?-H?O system using gas-liquid chromatography  

E-Print Network [OSTI]

, D. H. , Goldup, A. , Lockhurst, G. R. , Swanton, W. T. , "The Effect of Carrier Gas and Column Pressure on Solute Retention, " Gas Chromato ra h 1962, Butterworths (London , 7 19 2 Everett, D. H. , Stoddard, C. T. H. , Trans. Far . Soc. , 57, 754... variables. APPENDIX B (continued) Table BI (continued) Sample Size: 15 pl Air/2 to 3 pl H20 Detector Current: 55 mA Detector Temperature: 65 0 Regulator Pressure: 80 psig Attenuation: 1 Infector Temperature; 100 C P, T Trial in. Hg F t air min...

Rogers, Keith Nolan

1979-01-01T23:59:59.000Z

303

Rapid and Sensitive Analysis of 3,4-Methylenedioxypyrovalerone in Equine Plasma Using Liquid Chromatography–Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......properties and potential for abuse and drug dependency. MDPV was...designer drug often sold on the internet. It was first synthesized in...A new trend in drug-of-abuse; The 2C-series of phenethylamine...Rintatalo J. New desinger drug of abuse: 3,4-Methylenedioxypyrovalerone......

Caroline C. Wang; Petra Hartmann-Fischbach; Tim R. Krueger; Terry L. Wells; Amy R. Feineman; Joanne C. Compton

2012-06-01T23:59:59.000Z

304

Folate Profiling in Potato (Solanum tuberosum) Tubers by Ultrahigh-Performance Liquid Chromatography–Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

Comparison of genuine replicates within a tuber and corresponding segments of different potatoes were used for evaluating the variability within a certain potato variety. ... The median variability (%RSD, Figure 3d) of genuine replicates within a single potato was 12%, increasing to 30% when considering corresponding segments of different potatoes. ... This resulted in a moderate decrease in median variability (to 11% and 26% within and between the individual potatoes, respectively), demonstrating that folate concentrations in potato tubers may be expressed as FW as well as their DW equivalent. ...

Jeroen Van Daele; Dieter Blancquaert; Filip Kiekens; Dominique Van Der Straeten; Willy E. Lambert; Christophe P. Stove

2014-03-22T23:59:59.000Z

305

Determination of aspartame, caffeine, saccharin, and benzoic acid in beverages by high performance liquid chromatography: An undergraduate analytical chemistry experiment  

Science Journals Connector (OSTI)

Separations can be applied to the analysis of soft drinks, artificial sweeteners, fruit juices, and coffee.

Michael F. Delaney; Kathleen M. Pasko; David M. Mauro; Diane S. Gsell; Philip C. Korologos; John Morawski; Linda J. Krolikowski; F. Vincent Warren Jr.

1985-01-01T23:59:59.000Z

306

Methyl mercaptan and dimethyl disulfide production from methionine by Proteus species detected by head-space gas-liquid chromatography.  

Science Journals Connector (OSTI)

...spectra with a reference library file (8). This identification...neither pure sam- ple nor library spectrum was available...comparison of head- space sampling with direct...Shigella Centre, Central Public Health Laboratory, London...chromatographic analysis of head-space gas of dilute aqueous...

N J Hayward; T H Jeavons; A J Nicholson; A G Thornton

1977-09-01T23:59:59.000Z

307

Determination of 11 Low-Molecular-Weight Carbonyl Compounds in Marine Algae by High-Performance Liquid Chromatography  

Science Journals Connector (OSTI)

......4-heptenal via a water-mediated retro-aldol condensation. For the specific...The percent recovery of volatile carbonyl...4.5 ppb in water). Hexanal levels...ysis method for atmospheric formaldehyde...acetaldehyde in drinking water and alcoholic......

Vilma Mota da Silva; Márcia Cristina da Cunha Veloso; Eliane Teixeira Sousa; Gislaine Vieira Santos; Miguel C. Accioly; Pedro Afonso de P. Pereira; Jailson B. de Andrade

308

Simultaneous Determination of Sulfonamides, Penicillins and Coccidiostats in Pork by High-Performance Liquid Chromatography–Tandem Mass Spectrometry  

Science Journals Connector (OSTI)

......technique such as atmospheric pressure ionization...employed: one with water and a one with solid-phase...Spain). Ultrapure water was made in-house with a Milli-Q water system (Millipore...in-house nitrogen generator from Peak Scientific......

C. Nebot; P. Regal; J. Miranda; A. Cepeda; C. Fente

2012-05-01T23:59:59.000Z

309

A 3-(p-Acetylphenoxy)propylsilane Bonded Phase for Liquid Chromatography of Basic Amines and Other Nitrogen Compounds  

Science Journals Connector (OSTI)

......grade (Fisher) and were filtered through 0.20-m membrane filters. The Shale Oil sample was a Tosco (II) ore (Oil Shale Corporation). Infrared spectral quality potas sium bromide (Baker) was dried in an oven at 120 C for 24 hr. Figure1......

Daniel Y. Pharr; Peter C. Uden; Sidney Siggia

1985-09-01T23:59:59.000Z

310

Determination of Polycyclic Aromatic Hydrocarbons in Fresh Milk by Hollow Fiber Liquid-Phase Microextraction–Gas Chromatography Mass Spectrometry  

Science Journals Connector (OSTI)

......my 1 Department of Chemistry, Faculty of Science...Pharmaceutical and Medicinal Chemistry, National Research...products of the incomplete combustion of carbon-containing material, such as coal, oil or municipal waste...aromatic hydrocarbons: Chemistry and analysis. (2000......

Mohd Marsin Sanagi; Saw Hong Loh; Wan Aini Wan Ibrahim; Mohamed Noor Hasan; Hassan Y. Aboul Enein

2013-02-01T23:59:59.000Z

311

Noise Reduction in Flame lonization Type Liquid Chromatography Monitors: Development of An Improved Method for Sample Transport  

Science Journals Connector (OSTI)

......immediately apparent are: (1) a defective link, e.g., one that is collapsed...progressive buildup of the material on the car- rier. For buffers that do not...linear func- tion of chain speed, a defective link does not cause a significant......

R. H. Stevens

1968-07-01T23:59:59.000Z

312

Multiplex Liquid Chromatography-Tandem Mass Spectrometry Assay for Simultaneous Therapeutic Drug Monitoring of Ribavirin, Boceprevir, and Telaprevir  

Science Journals Connector (OSTI)

...simplicity make it ideal for routine implementation in clinical laboratory settings. The...Reindollar, V Rustgi, F McPhee, M Wind-Rotolo, A Persson, K Zhu, DI Dimitrova...bioanalytical methods validation and implementation: best practices for chromatographic...

Manel Aouri; Darius Moradpour; Matthias Cavassini; Thomas Mercier; Thierry Buclin; Chantal Csajka; Amalio Telenti; Andri Rauch; Laurent A. Decosterd

2013-04-29T23:59:59.000Z

313

Analysis of Zolpidem in Postmortem Fluids and Tissues Using Ultra-Performance Liquid Chromatography–Mass Spectrometry  

Science Journals Connector (OSTI)

......insomnia by slowing the activity in the brain. It is prescribed as a short-term treatment...kidney, spleen, muscle, heart and brain. This report describes the analysis and...kidney, spleen, muscle, heart and brain). The blood from the cases was stored......

Kristi S. Thompson; Russell J. Lewis; Roxane M. Ritter

2014-10-01T23:59:59.000Z

314

Quantitative Determination and Pharmacokinetic Study of Aurantio-Obtusin in Rat Plasma by Liquid Chromatography-Mass Spectrometry  

Science Journals Connector (OSTI)

......including antioxidant (5), antiglycation (6), antimutagenic (7), antigenotoxic (8) and neuroprotective effects in brain disease models (9). Several formulations containing C. semen are available in Chinese markets for use in preventing hyperlipidemia......

Nan Zhang; Ning Dong; Li Pang; Hong Xu; Honglei Ji

2014-10-01T23:59:59.000Z

315

Rapid Analysis of Lewisite Metabolites in Urine by High-Performance Liquid Chromatography-Inductively Coupled Plasma-Mass Spectrometry  

Science Journals Connector (OSTI)

......six-week period to demonstrate the long-term previ- sion and accuracy of the...chemical weapon becomes hazardous waste. Chem. Eng. Prog. 101: 64...C. Le. Sample preparation and storage can change arsenic spe- ciation......

Rayman D. Stanelle; William J. McShane; Elena N. Dodova; R. Steven Pappas; Robert J. Kobelski

2010-04-01T23:59:59.000Z

316

Analysis of Zolpidem in Postmortem Fluids and Tissues Using Ultra-Performance Liquid Chromatography–Mass Spectrometry  

Science Journals Connector (OSTI)

......concentrations average 0.06 mg/L...or accidental consumption (6, 8, 9...obtained from Country Home Meat Co. (Country Home Meat Co.; Edmond...voltages, collision energies and ionization...time 5% of the average calibrator retention......

Kristi S. Thompson; Russell J. Lewis; Roxane M. Ritter

2014-10-01T23:59:59.000Z

317

Determination of Polycyclic Aromatic Hydrocarbons in Fresh Milk by Hollow Fiber Liquid-Phase Microextraction–Gas Chromatography Mass Spectrometry  

Science Journals Connector (OSTI)

......Polycyclic Aromatic Hydrocarbons in Fresh Milk by...polycyclic aromatic hydrocarbons (PAHs) in fresh...more volatile and heat sensitive. The...Polycyclic aromatic hydrocarbons (PAHs) are compounds...the incomplete combustion of carbon-containing...respectively. Data were collected......

Mohd Marsin Sanagi; Saw Hong Loh; Wan Aini Wan Ibrahim; Mohamed Noor Hasan; Hassan Y. Aboul Enein

2013-02-01T23:59:59.000Z

318

Confirmatory analysis of ethylglucuronide in urine by liquid-chromatography/electrospray ionization/tandem mass spectrometry according to forensic guidelines  

Science Journals Connector (OSTI)

?-D-ethylglucuronide (EtG) is a stable Phase II metabolite of ethanol which can be detected in urine samples several days after elimination of ethanol. It is a useful diagnostic parameter for monitoring abstinence of alcoholics in alcohol withdrawal treatment. For this purpose, determination in urine is mainly performed by LC-MS, LC-MS/MS, or by GC-MS. For the mass spectrometric identification and detection of controlled substances in more sensitive fields such as forensic toxicology, workplace drug testing, doping analysis, and veterinary organic residue control, official guidelines have been released requiring a chromatographic separation and a minimum of two mass spectrometric transitions of the analyte. However, for detection of EtG none of the published LC-MS/MS methods could fulfill the minimum requirements of any of these guidelines. Therefore, an existing LC-MS/MS method has been modified by monitoring further MS/MS transitions instead of only one (deprotonated molecule [M ? H]?/product ions: m/z 75, 85, 113, and 159 optional) with the aim of withstanding administrative or court scrutiny in forensic or workplace drug testing cases. Full method validation has been performed in accordance to guidelines of the German Society of Toxicology and Forensic Chemistry (GTFCh) and requirements of ISO 17025. One application field in the United States is a workplace monitoring program to detect surreptitious alcohol use among recovering health professionals, who by contract had agreed on total abstinence after drug and alcohol withdrawal therapy.

Wolfgang Weinmann; Patrick Schaefer; Annette Thierauf; André Schreiber; Friedrich Martin Wurst

2004-01-01T23:59:59.000Z

319

Determination of Acepromazine, Ketamine, Medetomidine, and Xylazine in Serum: Multi-Residue Screening by Liquid Chromatography-Mass Spectrometry  

Science Journals Connector (OSTI)

......APCI) and selective ion monitoring mode (SIM)of MS. Analysis...obtained in a full- scan monitoring mode with positive APCI...dataobtained in a full-scan monitoring modefor individual 100 ng...animals antemortem following surreptitious or illegal use at therapeutic......

Irina Rudik Miksa; Margaret R. Cummings; Robert H. Poppenga

2005-09-01T23:59:59.000Z

320

A Simultaneous Determination of Principal Compounds in Tokishakuyakusan by High-Performance Liquid Chromatography with Diode Array Detector  

Science Journals Connector (OSTI)

......1% phosphoric acid-acetonitrile gradient...natural resources and markets is in progress and...compounds: ferulic acid from Cnidium rhizome...Thus, it is worth trying to include...water-acetonitrile, formic acid 0.1%-acetonitrile......

Megumi Sumino; Yuko Saito; Fumio Ikegami; Takao Namiki

2014-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Separation of actinides from Low Level Liquid Wastes (LLLW) by extraction chromatography using novel DMDOHEMA and TODGA impregnated resins  

Science Journals Connector (OSTI)

The uptake of several actinides [U(VI), Th(IV), Am(III), Cm(III)] and fission products was investigated from nitric acid solutions by two novel extraction chromatographic sorbents containing 2-(2-hexyloxy-ethy...

K. Van Hecke; G. Modolo

2004-08-01T23:59:59.000Z

322

Review: Recent Application of Chiral Liquid Chromatography–Tandem Mass Spectrometric Methods for Enantiomeric Pharmaceutical and Biomedical Determinations  

Science Journals Connector (OSTI)

......CSPs. This mobile phase composition has the advantages of reversed-phase...development of pharmaceuticals, agrochemicals, food additives, fragrances...other industries such as agrochemical, food and environmental...Liu R.H. Enantiomeric composition of abused amine drugs: chromatographic......

Yanfang Nie; Xiumei Liu; Xinmei Yang; Zhongxi Zhao

2013-09-01T23:59:59.000Z

323

Characterization of Volatile Components in Dry Chrysanthemum Flowers Using Headspace—Liquid-Phase Microextraction—Gas Chromatography  

Science Journals Connector (OSTI)

......components to organic phase increases, the convection process intensifies...of the extraction efficiency increase was indistinctive. Therefore...7-methanoazulene * Retention time. Quality of the PBM search. Semiquantitative...of oak wood used for aging wines by headspace SPME-GCMS......

Guoqing Wang; Chunhong Dong; Yu-an Sun; Kui Xie; Haiyu Zheng

2008-02-01T23:59:59.000Z

324

Determination of Furanic Compounds in Traditional Balsamic Vinegars by Ion-Exclusion Liquid Chromatography and Diode-Array Detection  

Science Journals Connector (OSTI)

......led to an acidity increase that reached a final...unknown compound in wine and beer reported...to be an efficient quality marker for TBV...furans in fortified wines. Food Chem. 64...fluorescent light on the quality of orange juices...in barrel-aged wines. J. Agric. Food......

Fabio Chinnici; Francesca Masino; Andrea Antonelli

2003-07-01T23:59:59.000Z

325

Extremely Correlated Fermi Liquids B. Sriram Shastry  

E-Print Network [OSTI]

Extremely Correlated Fermi Liquids B. Sriram Shastry Physics Department, University of California the theory of an extremely correlated Fermi liquid with U ! 1. This liquid has an underlying auxiliary Fermi liquid Green's function that is further caparisoned by extreme correlations. The theory leads to two

California at Santa Cruz, University of

326

Commercialization of Coal-to-Liquids Technology  

SciTech Connect (OSTI)

The report provides an overview of the current status of coal-to-liquids (CTL) commercialization efforts, including an analysis of efforts to develop and implement large-scale, commercial coal-to-liquids projects to create transportation fuels. Topics covered include: an overview of the history of coal usage and the current market for coal; a detailed description of what coal-to-liquids technology is; the history of coal-to-liquids development and commercial application; an analysis of the key business factors that are driving the increased interest in coal-to-liquids; an analysis of the issues and challenges that are hindering the commercialization of coal-to-liquids technology; a review of available coal-to-liquids technology; a discussion of the economic drivers of coal-to-liquids project success; profiles of key coal-to-liquids developers; and profiles of key coal-to-liquids projects under development.

NONE

2007-08-15T23:59:59.000Z

327

Dense-Gas Chromatography of Nonvolatile Substances of High Molecular Weight  

Science Journals Connector (OSTI)

...and CO(2) carrier gases at temperatures of 140...either defied separation by gas chromatography or had...analysis Chromatography, Gas Phthalic Acids Silicones...it is probable that the remaining 12 JANUARY 1968 calcium...K. V. Thimann, The Life of Bacteria (Mac-millan...

Lilian McLaren; Marcus N. Myers; J. Calvin Giddings

1968-01-12T23:59:59.000Z

328

Analysis of Biodiesel/Petroleum Diesel Blends with Comprehensive Two-Dimensional Gas Chromatography  

Science Journals Connector (OSTI)

......Comprehensive two-dimensional gas chromatography (GC GC...assembled from a conventional gas chromatograph fitted with...bined with the high cost of crude oil, has sparked...interest in biodiesel production and distribution. Biodiesel...methods use single column gas chromatography (GC......

John V. Seeley; Stacy K. Seeley; Elise K. Libby; James D. McCurry

329

Application of High-Temperature High-Resolution Gas Chromatography to the Analysis of ?-Cyclodextrin Derivatives  

Science Journals Connector (OSTI)

......tures such as a lower cost and higher reso lution...using enantioselective gas chromatog raphy with mass...ature high resolution gas chromatography to paraffinic deposits in petroleum production pipelines. J. High Res...Injection in Capillary Gas Chromatography; with......

Alberto dos Santos Pereira; Edson Ferreira da Silva; Francisco Radler de Aquino Neto

1998-02-01T23:59:59.000Z

330

An Evaluation of Microextraction/Capillary Column Gas Chromatography for Monitoring Industrial Outfalls  

Science Journals Connector (OSTI)

......Microextraction/Capillary Column Gas Chromatography for Monitoring...for environmental and production analyses. Gary Olsen...both environmental and production lab activities. Daniel...and capillary-column gas chromatography techniques...because of its lower cost and more desirable maintenance......

Daniel R. Thielen; Gary Olsen; Abram Davis; Edward Bajor; John Stefanovski; John Chodkowski

1987-01-01T23:59:59.000Z

331

Screening of Pesticides via Solid-Phase Extraction and Gas Chromatography  

Science Journals Connector (OSTI)

......concentration is carried out with gas chromatography. Two columns...in the agricultural production of the province of Tucum...Bellefonte, PA). An HP 5890 gas chromatograph equipped...important for safety and cost in this kind of analysis...capil- lary-column gas chromatography/mass......

Atilio Sosa; Argelia Lenardón; Maria Liliana Mattassini

2003-02-01T23:59:59.000Z

332

Core-softened Fluids, Water-like Anomalies and the Liquid-Liquid Critical Points  

E-Print Network [OSTI]

. INTRODUCTION Water is characterized by well-known thermodynamic and kinetic liquid-state anomalies; for examplePREPRINT Core-softened Fluids, Water-like Anomalies and the Liquid-Liquid Critical Points Evy simulations are used to examine the relationship between water-like anoma- lies and the liquid-liquid critical

Barbosa, Marcia C. B.

333

Bibliography and Index to the Literature on Gas Chromatography—1965 November 1, 1964 to November 1, 1965  

Science Journals Connector (OSTI)

......DETERMINATION OF THE SOLUBILITY OF NITROUS OXIDE IN WATER BY GAS CHROMATOGRAPHY...OXYGEN, AND NITROGEN ON MODIFIED...English) 813 GAS CHROMATOGRAPHY...DETERMINATION OF THE SOLUBILITY OF NITROGEN IN WATER AND EXTRACTED...Kenneth G., J. Gas Chromatog......

Seaton T. Preston; Jr.; Mignon Gill

1965-12-01T23:59:59.000Z

334

Quantitation by Gas Chromatography-Chemical Ionization-Mass Spectrometry of Phenylalanine Mustard in Plasma of Patients  

Science Journals Connector (OSTI)

...1980 research-article Quantification by Gas Chromatography of N,N-Di-(2-chloroethyl...addressed. A sensitive method, based on gas chromatography using a phosphorus-specific...derivatization process has been elucidated using gas chromatography-electron impact mass spectrometry...

Sharon L. Pallante; Catherine Fenselau; Robert G. Mennel; Robert B. Brundrett; Mark Appler; Neil B. Rosenshein; Michael Colvin

1980-07-01T23:59:59.000Z

335

Forensic Discrimination of Automotive Paint Samples Using Pyrolysis-Gas Chromatography–Mass Spectrometry with Multivariate Statistics  

Science Journals Connector (OSTI)

......Analytical pyrolysis-gas chromatography (Py-GC...Analytical pyrolysis-gas chromatography (Py-GC...development, pyrolysis-gas chromatography (Py...considerations, such as lower cost, can lead one to change...does not vary between production sites, subtle differences......

Brian K. Kochanowski; Stephen L. Morgan

2000-03-01T23:59:59.000Z

336

Simultaneous Determination of 16 Pyrethroid Residues in Tea Samples Using Gas Chromatography and Ion Trap Mass Spectrometry  

Science Journals Connector (OSTI)

......67-64-1 Acetone | Acetone Gas Chromatography-Mass...are widely used in tea production, and pesticide residues...Analysis was performed by gas chromatography with ion...chroma- tography (LC), gas chromatography (GC...sensitive, and low- cost detection for pyrethroids......

Kuang Hua; Miao Hong; Hou Xiaolin; Zhao Yunfeng; Wu Yongning; Xu Chuanlai

2010-10-01T23:59:59.000Z

337

Physical Properties of Ionic Liquids  

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

Physical Properties of Ionic Liquids Consisting of the Physical Properties of Ionic Liquids Consisting of the 1-Butyl-3-Methylimidazolium Cation with Various Anions and the Bis(trifluoromethylsulfonyl)imide Anion with Various Cations Hui Jin, Bernie O'Hare, Jing Dong, Sergei Arzhantsev, Gary A. Baker, James F. Wishart, Alan J. Benesi, and Mark Maroncelli J. Phys. Chem. B 112, 81-92 (2008). [Find paper at ACS Publications] Abstract: Physical properties of 4 room-temperature ionic liquids consisting of the 1-butyl-3-methylimidazolium cation with various perfluorinated anions and the bis(trifluoromethylsulfonyl)imide (Tf2N-) anion with 12 pyrrolidinium-, ammonium-, and hydroxyl-containing cations are reported. Electronic structure methods are used to calculate properties related to the size, shape, and dipole moment of individual ions. Experimental measurements of

338

Liquid soap film generates electricity  

E-Print Network [OSTI]

We have observed that a rotating liquid soap film generates electricity when placed between two non-contact electrodes with a sufficiently large potential difference. In our experiments suspended liquid film (water + soap film) is formed on the surface of a circular frame, which is forced to rotate in the $x-y$ horizontal plane by a motor. This system is located at the center of two capacitor-like vertical plates to apply an external electric voltage difference in the $x-$direction. The produced electric current is collected from the liquid film using two conducting electrodes that are separated in the $y-$direction. We previously reported that a liquid film in an external electric field rotates when an electric current passes through it, naming it the liquid film motor (LFM). In this paper we report a novel technique, in which a similar device can be used as an electric generator, converting the rotating mechanical energy to electrical energy. The liquid film electric generator (LFEG) is in stark contrast to the LFM, both of which could be designed similarly in very small scales like micro scales with different applications. Although the device is comparable to commercial electric motors or electric generators, there is a significant difference in their working principles. Usually in an electric motor or generator the magnetic field causes the driving force, while in a LFM or LFEG the Coulomb force is the driving force. This fact is also interesting from the Bio-science point of view and brings a similarity to bio motors. Here we have investigated the electrical characteristics of such a generator for the first time experimentally and modelled the phenomenon with electroconvection governing equations. A numerical simulation is performed using the local approximation for the charge-potential relation and results are in qualitative agreement with experiments.

Ahmad Amjadi; Sadegh Feiz; Reza Montazeri Namin

2014-04-24T23:59:59.000Z

339

Method of measuring a liquid pool volume  

DOE Patents [OSTI]

A method of measuring a molten metal liquid pool volume and in particular molten titanium liquid pools is disclosed, including the steps of (a) generating an ultrasonic wave at the surface of the molten metal liquid pool, (b) shining a light on the surface of a molten metal liquid pool, (c) detecting a change in the frequency of light, (d) detecting an ultrasonic wave echo at the surface of the molten metal liquid pool, and (e) computing the volume of the molten metal liquid. 3 figures.

Garcia, G.V.; Carlson, N.M.; Donaldson, A.D.

1991-03-19T23:59:59.000Z

340

Use of Cold On-Column Injection for the Analysis of Putrescine and Cadaverine by Gas Chromatography  

Science Journals Connector (OSTI)

......indicators of fish quality (2). Furthermore, their presence increases the toxicity of his...by a temperature increase at a rate of 50 C...biogenic amines in wines by HPLC. Chromatographia...Karmas. Chemical quality index of canned tuna......

Marisa Bonilla; Leopoldo G. Enriquez; Harold M. McNair

1997-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Stiffening solids with liquid inclusions  

E-Print Network [OSTI]

From bone and wood to concrete and carbon fibre, composites are ubiquitous natural and engineering materials. Eshelby's inclusion theory describes how macroscopic stress fields couple to isolated microscopic inclusions, allowing prediction of a composite's bulk mechanical properties from a knowledge of its microstructure. It has been extended to describe a wide variety of phenomena from solid fracture to cell adhesion. Here, we show experimentally and theoretically that Eshelby's theory breaks down for small liquid inclusions in a soft solid. In this limit, an isolated droplet's deformation is strongly size-dependent with the smallest droplets mimicking the behaviour of solid inclusions. Furthermore, in opposition to the predictions of conventional composite theory, we find that finite concentrations of small liquid inclusions enhance the stiffness of soft solids. A straight-forward extension of Eshelby's theory, accounting for the surface tension of the solid-liquid interface, explains our experimental observations. The counterintuitive effect of liquid-stiffening of solids is expected whenever droplet radii are smaller than an elastocapillary length, given by the ratio of the surface tension to Young's modulus of the solid matrix.

Robert W. Style; Rostislav Boltyanskiy; Benjamin Allen; Katharine E. Jensen; Henry P. Foote; John S. Wettlaufer; Eric R. Dufresne

2014-07-24T23:59:59.000Z

342

Physical Chemistry of Ionic Liquids Symposium Schedule  

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

(Tentative Schedule, locations and times to be determined) (Tentative Schedule, locations and times to be determined) Sunday Morning Structure and Heterogeneity of Ionic Liquids I. James Wishart and Edward Castner Introductory Remarks Andre Pinkert Hydroxyamine ionic liquids and their properties Thomas Strassner TAAILs - Tunable Aryl-Alkyl Ionic Liquids: A new generation of ionic liquids Laura Sprunger Grubbs Thermodynamic Properties of New Generation Ionic Liquids Christopher Hardacre Prediction methods for physical properties of ionic liquids BREAK Patricia Hunt What happens when you functionalise an ionic liquid with a "silicone" side chain? Edward L Quitevis Effect of cation symmetry and nanoscale segregation on the morphology, physical properties, and low-frequency vibrational dynamics of 1,3-dialkylimidazolium cation ionic liquids

343

Nanopatterned anchoring layers for liquid crystals  

E-Print Network [OSTI]

This thesis describes the theory and fabrication of inhomogeneous Liquid Crystal anchoring layers. While chemical anchoring techniques have proved useful for many applications, especially Liquid Crystal Displays, they have ...

Gear, Christopher S. (Christopher Stanwood)

2014-01-01T23:59:59.000Z

344

Nanoparticle enhanced ionic liquid heat transfer fluids  

DOE Patents [OSTI]

A heat transfer fluid created from nanoparticles that are dispersed into an ionic liquid is provided. Small volumes of nanoparticles are created from e.g., metals or metal oxides and/or alloys of such materials are dispersed into ionic liquids to create a heat transfer fluid. The nanoparticles can be dispersed directly into the ionic liquid during nanoparticle formation or the nanoparticles can be formed and then, in a subsequent step, dispersed into the ionic liquid using e.g., agitation.

Fox, Elise B.; Visser, Ann E.; Bridges, Nicholas J.; Gray, Joshua R.; Garcia-Diaz, Brenda L.

2014-08-12T23:59:59.000Z

345

Ionic Liquids for Utilization of Geothermal Energy  

Broader source: Energy.gov [DOE]

DOE Geothermal Program Peer Review 2010 - Presentation. Project objective: to develop ionic liquids for two geothermal energy related applications.

346

Liquid Propane Injection Applications | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Liquid propane injection technology meets manufacturingassembly guidelines, maintenancerepair strategy, and regulations, with same functionality, horsepower, and torque as...

347

Heterophase liquid states: Thermodynamics, structure, dynamics  

E-Print Network [OSTI]

An overview of theoretical results and experimental data on the thermodynamics, structure and dynamics of the heterophase glass-forming liquids is presented. The theoretical approach is based on the mesoscopic heterophase fluctuations model (HPFM) developed within the framework of the bounded partition function approach. The Fischer cluster phenomenon, glass transition, liquid-liquid transformations, parametric phase diagram, cooperative dynamics and fragility of the glass-forming liquids is considered.

A. S. Bakai

2015-01-12T23:59:59.000Z

348

Deep liquid-chromatographic purification of uranium extract from technetium  

SciTech Connect (OSTI)

The recycling of uranium in the nuclear fuel cycle requires the removal of a number of radioactive and stable impurities like {sup 99}Tc from spent fuels. In order to improve the grade of uranium extract purification from technetium the method of liquid chromatography and the apparatus for its performance have been developed. Process of technetium extraction and concentrating in aqueous solution containing reducing agent has been studied on simulated solutions (U-Tc-HNO{sub 3}-30% TBP-isoparM). The dynamic tests of the method have been carried out on the laboratory unit. Solution of diformyl-hydrazine in nitric acid was used as a stationary phase. Silica gel with specific surface of 186 m{sup 2}/g was used as a carrier of the stationary phase. It is shown that the volume of purified extract increases as the solution temperature increases, concentration of reducing agent increases and extract flow rate decreases. It is established that the technetium content in uranium by this method could achieve a value below 0.3 ppm. Some variants of overload and composition of the stationary phase containing the extracted technetium have been offered and tested. It is defined that the method provides reduction of processing medium-active wastes by more than 10 times during finish refining process. (authors)

Volk, V.; Dvoeglazov, K; Podrezova, L.; Vidanov, V.; Pavlyukevich, E. [OAO State Research Center - VNIINM, Rogov str., bld. 5, Moscow (Russian Federation)

2013-07-01T23:59:59.000Z

349

Remarks on Liquid Wall Research Mohamed Abdou  

E-Print Network [OSTI]

Wall Research Advances the Science and Energy Goals of Fusion in a Perfect Fit · If we can make liquidRemarks on Liquid Wall Research Mohamed Abdou Professor Mechanical and Aerospace Engineering UCLA Note For recent presentations and papers on liquid wall research by the APEX team see website: http

Abdou, Mohamed

350

Commercialization of coal to liquids technology  

SciTech Connect (OSTI)

After an overview of the coal market, technologies for producing liquids from coal are outlined. Commercialisation of coal-to-liquid fuels, the economics of coal-to-liquids development and the role of the government are discussed. Profiles of 8 key players and the profiles of 14 projects are finally given. 17 figs., 8 tabs.

NONE

2007-07-01T23:59:59.000Z

351

Frostbite Theater - Liquid Nitrogen Experiments - Liquid Nitrogen Show!  

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

Insulators! Insulators! Previous Video (Insulators!) Frostbite Theater Main Index Next Video (Superconductors!) Superconductors! Liquid Nitrogen Show! All of your favorite liquid nitrogen experiments all in one place! Flowers! Balloons! Racquetballs! Nothing is safe! Just sit back, relax, and enjoy the show! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: Usually, every couple years, Jefferson Lab hosts an Open House. This is the one time the public and come and tour our accelerator and end stations. Steve: During the 2010 Open House, our cameraman snuck into one of the ongoing cryo shows that are held throughout the day. He missed half of it. So if you want to see the entire thing, check our website to see when the

352

Bibliography and Index to the Literature on Gas Chromatography: January 1, 1963 to November 1, 1963  

Science Journals Connector (OSTI)

......CHROMATOGRAPHY WITH ULTRAVIOLET DETECTOR, Merritt, Jack, Comendant, Frederick, Abrams...OF THE RAT, Morin, Robert J., Ber- nick, Sol, Mead, James F., and Alfin-Slater...Wharton, D. R. A., Black, E. D., Merritt, C., Jr., Wharton, Martha L......

Seaton T. Preston; Jr.; Geneva Hyder; Mignon Gill

1963-12-01T23:59:59.000Z

353

Gas Chromatography—Microwave-Induced Plasma for the Determination of Halogenated Hydrocarbons  

Science Journals Connector (OSTI)

......Spectroscopic Microwave generator: Applied Research...helium and argon at atmospheric pressures. Spec...plasma in helium at atmospheric pressure as an element-selective...organic compounds in water by gas chromatography (atmospheric pres sure helium......

M.M. Abdillahi

1990-12-01T23:59:59.000Z

354

E-Print Network 3.0 - anion exchange chromatography Sample Search...  

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

chromatography Page: << < 1 2 3 4 5 > >> 1 Merck KGaA Life Science Products Darmstadt Germany 11 processing@merck.de www.merck-lsp.de Summary: .merck-lsp.de 1.10316 Fractogel...

355

E-Print Network 3.0 - analyse par chromatographie Sample Search...  

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

search results for: analyse par chromatographie Page: << < 1 2 3 4 5 > >> 1 Nicholas ARMSTRONG 2 Jardins de Saint Jouanne Summary: changeuses d'ions. Analyses des ions par...

356

Pyrolysis/Gas Chromatography: Application in the Study of Biomass Pyrolysis  

Science Journals Connector (OSTI)

The analytical chemistry technique of pyrolysis/gas chromatography has been applied to the study of biomass pyrolysis. Very small samples of biomass feedstocks were pyrolyzed in a controlled, reproducible manner....

John C. Franklin; James L. Kuester

1988-01-01T23:59:59.000Z

357

Radiochemical analysis of the polar agrochemicals validamycin and the metabolite melamine by ion-exchange chromatography  

Science Journals Connector (OSTI)

Suitable analytical methods to determine the radiochemical purity of validamycin and melamine are not described in the literature. High performance ion-exchange chromatography for the detection of underivatize...

A. Fredenhagen

2004-08-01T23:59:59.000Z

358

Bubbles in Insulating Liquids: Stability in an Electric Field  

Science Journals Connector (OSTI)

...July 1964 research-article Bubbles in Insulating Liquids: Stability in an Electric Field C. G...Krasucki It is shown that a bubble of gas or liquid, immersed...of incompressible (liquid) bubbles immersed in an insulating liquid...

1964-01-01T23:59:59.000Z

359

Liquid Propane Injection Technology Conductive to Today's North...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Technology Conductive to Today's North American Specification Liquid Propane Injection Technology Conductive to Today's North American Specification Liquid propane injection...

360

Viscosity of liquid Fe at high pressure  

Science Journals Connector (OSTI)

Synchrotron x-ray radiography has been used to measure the viscosity of pure liquid Fe at high pressure and temperature in a large volume press. A probe sphere rising through liquid Fe at high pressure and temperature is imaged, in situ, allowing for the derivation of sample viscosity through a modified form of Stokes’ equation. The effect of pressure on viscosity is fit by the semi empirical framework for transport coefficients in liquid metals, providing experimental verification of constant viscosity at the pressure-dependent melting temperature of liquid Fe where no change in liquid structure occurs.

Michael D. Rutter; Richard A. Secco; Hongjian Liu; Takeyuki Uchida; Mark L. Rivers; Stephen R. Sutton; Yanbin Wang

2002-08-14T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

TETRAALKYLPHOSPHONIUM POLYOXOMETALATES AS NOVEL IONIC LIQUIDS.  

SciTech Connect (OSTI)

The pairing of a Lindqvist or Keggin polyoxometalate (POM) anion with an appropriate tetraalkylphosphonium cation, [R{sub 3}R{prime}P]{sup +}, has been shown to yield an original family of ionic liquids (POM-ILs), among them salts liquid at or near ambient temperature. The physicochemical properties of several such 'inorganic liquids', in particular their thermal properties, suggests the possible application of these compounds as robust, thermally-stable solvents for liquid-liquid extraction. A preliminary evaluation of the potential of POM-ILs in this application is presented.

DIETZ,M.L.; RICKERT, P.G.; ANTONIO, M.R.; FIRESTONE, M.A.; WISHART, J.F.; SZREDER, T.

2007-11-30T23:59:59.000Z

362

Catalyst for hydrotreating carbonaceous liquids  

DOE Patents [OSTI]

A catalyst for denitrogenating and desulfurating carbonaceous liquid such as solvent refined coal includes catalytic metal oxides impregnated within a porous base of mostly alumina with relatively large pore diameters, surface area and pore volume. The base material includes pore volumes of 0.7-0.85 ml/g, surface areas of 200-350 m.sup.2 /g and pore diameters of 85-200 Angstroms. The catalytic metals impregnated into these base materials include the oxides of Group VI metals, molybdenum and tungsten, and the oxides of Group VIII metals, nickel and cobalt, in various combinations. These catalysts and bases in combination have effectively promoted the removal of chemically combined sulfur and nitrogen within a continuous flowing mixture of carbonaceous liquid and hydrogen gas.

Berg, Lloyd (Bozeman, MT); McCandless, Frank P. (Bozeman, MT); Ramer, Ronald J. (Idaho Falls, ID)

1982-01-01T23:59:59.000Z

363

Alien liquid detector and control  

SciTech Connect (OSTI)

An alien liquid detector employs a monitoring element and an energizing circuit for maintaining the temperature of the monitoring element substantially above ambient temperature. For this purpose an electronic circit controls a flow of heating current to the monitoring element. The presence of an alien liquid is detected by sensing a predetermined change in heating current flow to the monitoring element, e.g., to distinguish between water and oil. In preferred embodiments the monitoring element is a thermistor whose resistance is compared with a reference resistance and heating current through the thermistor is controlled in accordance with the difference. In one embodiment a bridge circuit senses the resistance difference; the difference may be sensed by an operational amplifier arrangement. Features of the invention include positioning the monitoring element at the surface of water, slightly immersed, so that the power required to maintain the thermistor temperature substantially above ambient temperature serves to detect presence of oil pollution at the surface.

Potter, B.M.

1980-09-02T23:59:59.000Z

364

Membrane Separations of Liquid Mixtures  

E-Print Network [OSTI]

MEMBRANE SEPARATIONS OF LIQUID MIXTURES Douglas R. Lloyd Separations Research Program Department of Chemical Engineering The University of Texas at Austin Austin, Texas In recent years considerable attention has been given to the need... for reduced energy costs in the chemical processing industry. A major portion of the energy consumed in this industry is associated with the separation and recovery of chemicals. Membrane processes offer energy-efficient, cost effective methods...

Lloyd, D. R.

365

Vapor–liquid equilibrium for binary system of tetrahydrothiophene + 2,2,4-trimethylpentane and tetrahydrothiophene + 2,4,4-trimethyl-1-pentene at 358.15 and 368.15 K  

Science Journals Connector (OSTI)

Isothermal vapor–liquid equilibrium (VLE) for tetrahydrothiophene + 2,2,4-trimethylpentane and tetrahydrothiophene + 2,4,4-trimethyl-1-pentene at 358.15 and 368.15 K were measured with a circulation still. All systems studied exhibit positive deviation from Raoult's law. No azeotropic behavior was found in all systems at the measured temperatures. The experimental results were correlated with the Wilson model and compared to COSMO-SAC predictive model. Analyses of liquid and vapor phase composition were determined with gas chromatography. All VLE measurements passed the three thermodynamic consistency tests used. The activity coefficients at infinite dilution are also presented.

Erlin Sapei; Petri Uusi-Kyyny; Kari I. Keskinen; Juha-Pekka Pokki; Ville Alopaeus

2010-01-01T23:59:59.000Z

366

EIA - International Energy Outlook 2008-Liquid Fuels  

Gasoline and Diesel Fuel Update (EIA)

Liquid Fuels Liquid Fuels International Energy Outlook 2008 Chapter 2 - Liquid Fuels World liquids consumption increases from 84 million barrels per day in 2005 to 99 million barrels per day in 2030 in the IEO2008 high price case. In the reference case, which reflects a price path that departs significantly from prices prevailing in the first 8 months of 2008, liquids use rises to 113 million barrels per day in 2030. Figure 26. World Liquids Production in the Reference Case, 1990-2030 (Million Barrels Oil Equivalent per Day). Need help, contact the National Energy Information Center at 202-586-8800. Figure Data Figure 27. World Production of Unconventional Liquid Fuels, 2005-2030 (Million Barrels Oil Equivalent per Day). Need help, contact the National Energy Information Center at 202-586-8800.

367

Characterization of the liquid phase obtained by copyrolysis of Mustafa Kemal Pasa (M.K.P.) Lignite (Turkey) with low density polyethylene  

SciTech Connect (OSTI)

This study describes the detailed hydrocarbon type characterization of the tar (liquid phase) obtained by copyrolysis of Mustafa Kemal Paa (M.K.P.) lignite (Turkey) and low density polyethylene (LDPE) and by pyrolysis of coal and LDPE individually. Various spectroscopic techniques (gas chromatography-mass spectroscopy (GC-MS), nuclear magnetic resonance spectroscopy ({sup 1}H NMR), Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC)) are used for characterization, and the effect of the experimental conditions (temperature, lignite:low density polyethylene (LDPE) ratio, and catalyst) on the hydrocarbon distributions is discussed. The results show that the tars obtained by copyrolysis have similar properties with commercial gasoline (especially in the presence of Red mud). Red mud and bentonite used as catalysts make a positive effect on the production of olefins instead aromatics. Polyethylene acts as a hydrogenation medium for the coal product as revealed by FTIR results. 18 refs., 9 figs., 5 tabs.

Ali Sinag; Melike Sungur; Mustafa Gullu; Muammer Canel [Ankara University, Beevler-Ankara (Turkey). Department of Chemistry, Science Faculty

2006-10-15T23:59:59.000Z

368

Transient-Liquid-Phase and Liquid-Film-Assisted Joining ofCeramics  

SciTech Connect (OSTI)

Two joining methods, transient-liquid-phase (TLP) joining and liquid-film-assisted joining (LFAJ), have been used to bond alumina ceramics. Both methods rely on multilayer metallic interlayers designed to form thin liquid films at reduced temperatures. The liquid films either disappear by interdiffusion (TLP) or promote ceramic/metal interface formation and concurrent dewetting of the liquid film (LFAJ). Progress on extending the TLP method to lower temperatures by combining low-melting-point (<450 C) liquids and commercial reactive-metal brazes is described. Recent LFAJ work on joining alumina to niobium using copper films is presented.

Sugar, Joshua D.; McKeown, Joseph T.; Akashi, Takaya; Hong, SungM.; Nakashima, Kunihiko; Glaeser, Andreas M.

2005-02-09T23:59:59.000Z

369

Partial-filling micellar electrokinetic chromatography and non-aqueous capillary electrophoresis for the analysis of selected agrochemicals  

Science Journals Connector (OSTI)

Selected agrochemicals (s-triazines and phenoxy acids) have been investigated with partial-filling micellar electrokinetic chromatography (PFMEKC) and non-aqueous capillary electrophoresis (NACE). Because these ...

F. Menzinger; Ph. Schmitt-Kopplin…

2001-09-01T23:59:59.000Z

370

Closed cycle liquid helium refrigerators  

Science Journals Connector (OSTI)

We have developed closed cycle liquid helium refrigerators using a Joule Thomson circuit precooled by commercially available two staged Gifford Mac Mahon cryocoolers. The Joule Thomson counterflow heat exchangers are modular and have been thermo-hydraulically characterized. Fully automatic cool down and operation are achieved by two pneumatically driven by pass and expansion valves. Several apparatus have been built or are under assembly with cooling power ranging from 100 mW up to 5 Watt, for temperature ranging from 2.8 K up to 4.5 K. A trouble free operation with several warm up and cool down cycles has been proven over 7000 hours.

G. Claudet; R. Lagnier; A. Ravex

1992-01-01T23:59:59.000Z

371

Flowing Liquid Crystal Simulating the Schwarzschild Metric  

E-Print Network [OSTI]

We show how to simulate the equatorial section of the Schwarzschild metric through a flowing liquid crystal in its nematic phase. Inside a liquid crystal in the nematic phase, a traveling light ray feels an effective metric, whose properties are linked to perpendicular and parallel refractive indexes, $n_o$ e $n_e$ respectively, of the rod-like molecule of the liquid crystal. As these indexes depend on the scalar order parameter of the liquid crystal, the Beris-Edwards hydrodynamic theory is used to connect the order parameter with the velocity of a liquid crystal flow at each point. This way we calculate a radial velocity profile that simulates the equatorial section of the Schwarzschild metric, in the region outside of Schwarzschild's radius, in the nematic phase of the liquid crystal. In our model, the higher flow velocity can be of the order of some meters per second.

Erms R. Pereira; Fernando Moraes

2010-11-21T23:59:59.000Z

372

Study of Liquid Dynamics by Neutron Scattering  

Science Journals Connector (OSTI)

This paper reviews the information about the collective motions of atoms in liquids which can be obtained from neutron scattering experiments with particular attention to the rare gases and liquid metals. The current status of the theoretical interpretation is examined. Coherent neutron scattering from a monatomic liquid gives directly the spectrum of the correlation function for density fluctuations in the system for wavelengths in the range 1–10 Å. The results have a dual interpretation. On the one hand they may be understood in terms of a viscoelastic theory which takes into account the microscopic structure of the liquid; on the other hand fluctuations at these wavelengths may be interpreted in terms of vibrational modes as in an amorphous solid. The paper attempts to reconcile these two points of view. Qualitative differences between liquidargon and the liquid metals are discussed with reference to the connection between the neutron results and the microscopic properties of these liquids.

P. Schofield

1969-01-01T23:59:59.000Z

373

Mechanism of constitution liquid film migration  

SciTech Connect (OSTI)

Liquid film migration (LFM) in liquid phase sintering classically involves a large metastable liquid volume adjacent to solid, and migration occurs at an isolated solid-liquid (S-L) interface. Constitutional liquid film migration (CLFM), discovered in alloy 718, has major characteristics similar to those of LFM, except that the metastable liquid is from the constitutional liquation of precipitates on the grain boundary. The similarity between LFM and CLFM has led to the theory that coherency lattice strain responsible for LFM is also responsible for CLFM. The coherency strain hypothesis was tested in this study by evaluating whether the Hillert model of LFM would also apply for CLFM. Experimental results of CLFM in alloy 718 showed that migration velocity followed the trend predicted by the Hillert model. This indicates that the coherency strain hypothesis of LFM also applies for CLFM and that the coherency lattice strain responsible for LFM is also the driving force for CLFM.

NONE

1999-06-01T23:59:59.000Z

374

Solubility of Carbohydrates in Ionic Liquids  

Science Journals Connector (OSTI)

‡ Laboratório Nacional de Energia e Geologia, I.P., Unit of Bioenergy, Estrada do Paço do Lumiar 22, 1649-038, Lisboa, Portugal ... The aim of this Review is to assess the current state of knowledge regarding the solubility of carbohydrates in ionic liquids but not on modifications of carbohydrates in ionic liquids. ... We herein collect all of the available literature data about the solubility of various carbohydrates in ionic liquids and highlight their interactions with carbohydrates. ...

Ma?gorzata Ewa Zakrzewska; Ewa Bogel-?ukasik; Rafa? Bogel-?ukasik

2010-01-07T23:59:59.000Z

375

Tokamak with liquid metal toroidal field coil  

DOE Patents [OSTI]

Tokamak apparatus includes a pressure vessel for defining a reservoir and confining liquid therein. A toroidal liner disposed within the pressure vessel defines a toroidal space within the liner. Liquid metal fills the reservoir outside said liner. Electric current is passed through the liquid metal over a conductive path linking the toroidal space to produce a toroidal magnetic field within the toroidal space about the major axis thereof. Toroidal plasma is developed within the toroidal space about the major axis thereof.

Ohkawa, Tihiro (La Jolla, CA); Schaffer, Michael J. (San Diego, CA)

1981-01-01T23:59:59.000Z

376

Liquid metal cooled nuclear reactor plant system  

DOE Patents [OSTI]

A liquid metal cooled nuclear reactor having a passive cooling system for removing residual heat resulting for fuel decay during reactor shutdown, or heat produced during a mishap. The reactor system is enhanced with sealing means for excluding external air from contact with the liquid metal coolant leaking from the reactor vessel during an accident. The invention also includes a silo structure which resists attack by leaking liquid metal coolant, and an added unique cooling means.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1993-01-01T23:59:59.000Z

377

Gas well operation with liquid production  

SciTech Connect (OSTI)

Prediction of liquid loading in gas wells is discussed in terms of intersecting tubing or system performance curves with IPR curves and by using a more simplified critical velocity relationship. Different methods of liquid removal are discussed including such methods as intermittent lift, plunger lift, use of foam, gas lift, and rod, jet, and electric submersible pumps. Advantages, disadvantages, and techniques for design and application of the methods of liquid removal are discussed.

Lea, J.F.; Tighe, R.E.

1983-02-01T23:59:59.000Z

378

Liquid metal Flow Meter - Final Report  

SciTech Connect (OSTI)

Measuring the flow of liquid metal presents serious challenges. Current commercially-available flow meters use ultrasonic, electromagnetic, and other technologies to measure flow, but are inadequate for liquid metal flow measurement because of the high temperatures required by most liquid metals. As a result of the reactivity and high temperatures of most liquid metals, corrosion and leakage become very serious safety concerns. The purpose of this project is to develop a flow meter for Lockheed Martin that measures the flow rate of molten metal in a conduit.

Andersen C, Hoogendoom S, Hudson B, Prince J, Teichert K, Wood J, Chase K

2007-01-30T23:59:59.000Z

379

Exciplex Fluorescence Thermometry of Liquid Fuel  

Science Journals Connector (OSTI)

An experimental program is described that investigates the application of exciplex fluorescence to the internal thermometry of flowing liquid decane in the temperature range 24-91°C....

Stufflebeam, John H

1989-01-01T23:59:59.000Z

380

,"Natural Gas Plant Liquids Proved Reserves"  

U.S. Energy Information Administration (EIA) Indexed Site

,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Natural Gas Plant Liquids Proved Reserves",49,"Annual",2012,"6301979" ,"Release...

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Viscosity of Liquid Sodium and Potassium  

Science Journals Connector (OSTI)

2 November 1936 research-article Viscosity of Liquid Sodium and Potassium Y. S. Chiong The Royal Society is collaborating with JSTOR to digitize, preserve, and extend...

1936-01-01T23:59:59.000Z

382

,"Natural Gas Plant Liquids Proved Reserves"  

U.S. Energy Information Administration (EIA) Indexed Site

,"Worksheet Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","Natural Gas Plant Liquids Proved Reserves",49,"Annual",2013,"6301979" ,"Release...

383

Closed-field capacitive liquid level sensor  

DOE Patents [OSTI]

A liquid level sensor based on a closed field circuit comprises a ring oscillator using a symmetrical array of plate units that creates a displacement current. The displacement current varies as a function of the proximity of a liquid to the plate units. The ring oscillator circuit produces an output signal with a frequency inversely proportional to the presence of a liquid. A continuous liquid level sensing device and a two point sensing device are both proposed sensing arrangements. A second set of plates may be located inside of the probe housing relative to the sensing plate units. The second set of plates prevent any interference between the sensing plate units.

Kronberg, J.W.

1995-01-01T23:59:59.000Z

384

Seeing clearly through a liquid | EMSL  

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

Influencing Quantitative Liquid (Scanning) Transmission Electron Microscopy." 2014. Chemical Communications 50(8):4873-4880. DOI: 10.1039c3cc48479c Related Staff: James Evans...

385

Coal and Coal-Biomass to Liquids  

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

and Coal-Biomass to Liquids News Gasifipedia Coal-Biomass Feed Advanced Fuels Synthesis Systems Analyses International Activity Project Information Project Portfolio Publications...

386

Cryocompressed Hydrogen Storage and Liquid Delivery  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Cryocompressed Hydrogen Storage & Liquid Delivery Jacob Leachman, Ph.D. Assistant Professor DOE H 2 Transmission & Delivery Workshop 2262014 H Y P E R H drogen roperties for...

387

Onsite Wastewater Treatment Systems: Liquid Chlorination  

E-Print Network [OSTI]

This publication explains the process, components, legal requirements, factors affecting performance, and maintenance needs of liquid chlorination systems for onsite wastewater treatment....

Weaver, Richard; Lesikar, Bruce J.; Richter, Amanda; O'Neill, Courtney

2008-10-23T23:59:59.000Z

388

Hazardous Liquid Pipelines and Storage Facilities (Iowa)  

Broader source: Energy.gov [DOE]

This statute regulates the permitting, construction, monitoring, and operation of pipelines transporting hazardous liquids, including petroleum products and coal slurries. The definition used in...

389

The response of a point source in a liquid layer overlying a liquid half space  

E-Print Network [OSTI]

The response to a harmonic point source in a liquid layer overlying a liquid half space is computed as a function of frequency. Included are the contributions form all normal modes that occur, and the branch-line integral ...

Greenfield, Roy

1962-01-01T23:59:59.000Z

390

Behavior of hydrophobic ionic liquids as liquid membranes on phenol removal: Experimental study and optimization  

E-Print Network [OSTI]

Room temperature ionic liquids show potential as an alternative to conventional organic membrane solvents mainly due to their properties of low vapor pressure, low volatility and they are often stable. In the present work, the technical feasibilities of room temperature ionic liquids as bulk liquid membranes for phenol removal were investigated experimentally. Three ionic liquids with high hydrophobicity were used and their phenol removal efficiency, membrane stability and membrane loss were studied. Besides that, the effects of several parameters, namely feed phase pH, feed concentration, NaOH concentration and stirring speeds on the performance of best ionic liquid membrane were also evaluated. Lastly, an optimization study on bulk ionic liquid membrane was conducted and the maximum phenol removal efficiency was compared with the organic liquid membranes. The preliminary study shows that high phenol extraction and stripping efficiencies of 96.21% and 98.10%, respectively can be achieved by ionic liquid memb...

Ng, Y S; Hashim, M A

2014-01-01T23:59:59.000Z

391

Liquid composition having ammonia borane and decomposing to form hydrogen and liquid reaction product  

DOE Patents [OSTI]

Liquid compositions of ammonia borane and a suitably chosen amine borane material were prepared and subjected to conditions suitable for their thermal decomposition in a closed system that resulted in hydrogen and a liquid reaction product.

Davis, Benjamin L; Rekken, Brian D

2014-04-01T23:59:59.000Z

392

Determination of Six Phthalic Acid Esters in Orange Juice Packaged by PVC Bottle Using SPE and HPLC-UV: Application to the Migration Study  

Science Journals Connector (OSTI)

......Y. Kang, W. Den, H. Bai, and F. Ko. Direct quantitative analysis of phthalate esters as micro-contaminants in cleanroom air and wafer surfaces by auto-thermal desorption-gas chromatography-mass spectrometry. J. Chromatogr. A 1070: 137145......

Zhiyong Guo; Danyi Wei; Meili Wang; Sui Wang

2010-10-01T23:59:59.000Z

393

Spiers Memorial Lecture Recent experimental advances in studies of liquid/liquid  

E-Print Network [OSTI]

complicated processes such as molecular transport across cell membranes. A variety of techniques have been on the interaction of a hydrophobic surface with water, and ion and solute transport across these and other liquid/hydrophilic properties of liquid/ liquid interfaces. In biological systems, protein folding and membrane formation rely

Richmond, Geraldine L.

394

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources for  

E-Print Network [OSTI]

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources) microchannel waveguides with liquid cores containing fluorescent dyes, excited by incident light from an external halogen bulb. Simultaneous use of multiple fluorophores in a common solution, in a single L2 light

Prentiss, Mara

395

Communications Counterion Effects in Liquid Crystal  

E-Print Network [OSTI]

of nanostructured CdS templated directly with ion-doped liquid crystals.13,14 In both cases the mesoporous solidCommunications Counterion Effects in Liquid Crystal Templating of Nanostructured CdS V. Tohver, P system, nanostructured particles consisting of alternat- ing sheets of CdS and oligomeric vinyl alcohol

Braun, Paul

396

Fiber-optic liquid level sensor  

DOE Patents [OSTI]

A fiber-optic liquid level sensor measures the height of a column of liquid through the hydrostatic pressure it produces. The sensor employs a fiber-optic displacement sensor to detect the pressure-induced displacement of the center of a corrugated diaphragm.

Weiss, Jonathan D. (Albuquerque, NM)

1991-01-01T23:59:59.000Z

397

Liquid Biofuels Strategies and Policies in selected  

E-Print Network [OSTI]

June 2011 Liquid Biofuels Strategies and Policies in selected African Countries A review of some of the challenges, activities and policy options for liquid biofuels Prepared for PISCES by Practical Action Biofuels Strategies and Policies in selected African Countries Although this research is funded by DFID

398

Cholesteric Pitch of Lyotropic Polymer Liquid Crystals  

Science Journals Connector (OSTI)

Cholesteric Pitch of Lyotropic Polymer Liquid Crystals ... The cholesteric pitch P of semiflexible helical polymer solutions was formulated using a threaded equivalent freely jointed chain model. ... The structure of cholesteric liquid crystals is characterized by the cholesteric pitch P or the cholesteric wavenumber qc (?2?/P). ...

Takahiro Sato; Jun Nakamura; Akio Teramoto; Mark M. Green

1998-02-03T23:59:59.000Z

399

Dynamic nuclear polarization of liquid 3He  

Science Journals Connector (OSTI)

...March 1998 research-article Dynamic nuclear polarization of liquid 3He B. Bleaney...3PU, UK Methods of producing dynamic nuclear polarization of liquid 3He by the solid...method have been proposed using enhanced nuclear paramagnetic resonance in Van Vleck compounds...

1998-01-01T23:59:59.000Z

400

Remarks on Liquid Wall Research Mohamed Abdou  

E-Print Network [OSTI]

Remarks on Liquid Wall Research Mohamed Abdou Professor Mechanical and Aerospace Engineering UCLA physicists and engineering scientists · Enhances synergism between IFE and MFE · Provides excellent disciplines. #12;Several "Ideas" Have Been Proposed for Liquid Walls Fluids 1) High-conductivity, low Pr

California at Los Angeles, University of

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Taylor Instability of Incompressible Liquids  

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

\ UNCLASSIFIED ' ;c ,. ' UNCLASSIFIED AECU-29'79 Subject Category: PHYSICS UNITED STATES ATOMIC ENERGY COMMISSION TAYLOR INSTABILITY OF INCOMPRESSIBLE LIQUIDS BY Enrico Fermi John von Neumann , _ November 1955 [ TIS Issuance D.a&?] Los Alamos Scientific Labqratqry Los Alamos, New Mexico Technical Information Service, Ooic Ridge, Tennessee DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available document. original I , The date for Part 1 is September 4, 1951. The date for Part 2 is August 19, 1953. Work performed under Contract PTo. W-7405-Eng-36. The Atomic Energy Commission makes no representation or warranty as to the accuracy or usefulness of the lnformatlon or statements contained

402

Enhanced liquid hydrocarbon recovery process  

SciTech Connect (OSTI)

This patent describes a process for the recovery of liquid hydrocarbons from a subterranean hydrocarbon-bearing formation. It comprises injecting natural gas into the formation via a well in fluid communication with the formation, the natural gas being at a temperature which is insufficient to significantly mobilize light density oil in the formation and at a pressure such that the natural gas is immiscible with the light density oil in the formation, the natural gas being injected in a volume sufficient to contact light density oil in the formation within a radius from the well of about 50 meters; shutting in the well for a period of time of about 1 to about 100 days which is sufficient to render the contacted light density oil mobile; and producing the light density oil which has been mobilized by solution of the natural gas from the well.

Haines, H.K.; Monger, T.G.; Kenyon, D.E.; Galvin, L.J.

1991-06-25T23:59:59.000Z

403

Viscosity of Liquid He II  

Science Journals Connector (OSTI)

The viscosity of liquid He4 has been measured between 1.10°K and the lambda point. A new type of viscometer was used, based on the damping of the transverse vibrations of a fine wire stretched between two rigid supports. The simplicity of the hydrodynamic problem and the low nuisance damping of the wire make this technique particularly appropriate for the measurement of small viscosities. The smoothed data are presented and found to be in good agreement with the latest rotating cylinder viscometer results. In different experimental runs the vibration frequency was varied by a factor of seven and the wire diameter by a factor of three. There was no evidence of systematic trend due to mean free-path effects or geometrical corrections.

J. T. Tough; W. D. McCormick; J. G. Dash

1963-12-15T23:59:59.000Z

404

Application of a Rapid Scanning Plasma Emission Detector and Gas Chromatography for Multi-Element Quantification of Halogenated Hydrocarbons  

Science Journals Connector (OSTI)

......Emission Detector and Gas Chromatography for...element-selective detector for gas chromatography...their insolubility in water, they accumulate...usually quantified by gas chromatographic separation...carbon, oxygen, and nitrogen. This element selective...because of the moderate solubility of this compound......

Mantay Zerezghi; K.J. Mulligan; J.A. Caruso

1984-08-01T23:59:59.000Z

405

Method Validation for the Simultaneous Determination of Fecal Sterols in Surface Waters by Gas Chromatography-Mass Spectrometry  

Science Journals Connector (OSTI)

......waters is estimated by gas chromatographic (GC...steroids and endogenous CHL production and metabolism, the sterol...Sterols in Surface Waters by Gas ChromatographyMass Spectrometry...ally quantitated by gas chromatography (GC...characterized. Because cost and time effectiveness......

Sándor Szucs; Attila Sárváry; Terry Cain; Róza Ádány

2006-02-01T23:59:59.000Z

406

Air Liquide - Biogas & Fuel Cells  

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

Liquide - Biogas & Fuel Cells Liquide - Biogas & Fuel Cells ■ Hydrogen Energy ■ Biogas Upgrading Technology 12 June 2012 Charlie.Anderson@airliquide.com 2 Air Liquide, world leader in gases for industry, health and the environment Renewable H 2 to Fuel Cell, Integrated Concept Purified Biogas 3 Air Liquide, world leader in gases for industry, health and the environment Renewable H 2 to Fuel Cell, Non-Integrated Concept Landfill WWTP digester Biogas membrane Pipeline quality methane CH4 Pipeline Hydrogen Production To Fuel Cell Vehicles Stationary Fuel Cells With H2 purification Stationary Fuel Cells Direct Conversion Directed Biomethane 4 Air Liquide, world leader in gases for industry, health and the environment Biogas Sources in the US ■ Landfill gas dominates (~4,000 Nm3/h typical)

407

Frostbite Theater - Liquid Nitrogen Experiments - Insulators!  

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

Popping Film Canisters! Popping Film Canisters! Previous Video (Popping Film Canisters!) Frostbite Theater Main Index Next Video (Liquid Nitrogen Show!) Liquid Nitrogen Show! Insulators! Cups full of water are placed into bowls of liquid nitrogen! Which cup will insulate the best? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a container of liquid nitrogen! Steve: And these are two plastic cups! Joanna: Let's see which cup is the better insulator! Steve: Okay! So, um, how do we do that? Joanna: Well, we'll pour water into each of the cups and then we'll pour the liquid nitrogen into each of the bowls. If we then place the cup in the bowl, the heat from the water will try to pass through the cup into the

408

Frostbite Theater - Liquid Nitrogen Experiments - Freezing Balloons!  

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

Season Two Bloopers Season Two Bloopers Previous Video (Season Two Bloopers) Frostbite Theater Main Index Next Video (Instant Liquid Nitrogen Balloon Party!) Instant Liquid Nitrogen Balloon Party! Freezing Balloons! What happens when a balloon full of air is plunged into a container full of liquid nitrogen? Play the video to find out! [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is a container of liquid nitrogen! Steve: And this is a really big balloon! Joanna: Let's see what happens when we place the balloon in the liquid nitrogen! Steve: Okay! Wait! Wait! Wait! Wait! Wait! Isn't the balloon going to pop? Joanna: We'll see! Steve: Aw, man... Huh. Okay, so the balloon didn't pop. But, there's

409

Sewage sludge dewatering using flowing liquid metals  

DOE Patents [OSTI]

A method and apparatus for reducing the moisture content of a moist sewage sludge having a moisture content of about 50% to 80% and formed of small cellular micro-organism bodies having internally confined water is provided. A hot liquid metal is circulated in a circulation loop and the moist sewage sludge is injected in the circulation loop under conditions of temperature and pressure such that the confined water vaporizes and ruptures the cellular bodies. The vapor produced, the dried sludge, and the liquid metal are then separated. Preferably, the moist sewage sludge is injected into the hot liquid metal adjacent the upstream side of a venturi which serves to thoroughly mix the hot liquid metal and the moist sewage sludge. The venturi and the drying zone after the venturi are preferably vertically oriented. The dried sewage sludge recovered is available as a fuel and is preferably used for heating the hot liquid metal.

Carlson, Larry W. (Oswego, IL)

1986-01-01T23:59:59.000Z

410

A Liquid Layer Solution for the Grid | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

A Liquid Layer Solution for the Grid A Liquid Layer Solution for the Grid A Liquid Layer Solution for the Grid September 15, 2011 - 2:47pm Addthis The Liquid Metal Battery is comprised of liquid metal electrodes and a liquid electrolyte of differing densities, which allows the liquids to separate and stratify without the need for any solid separator. The Liquid Metal Battery is comprised of liquid metal electrodes and a liquid electrolyte of differing densities, which allows the liquids to separate and stratify without the need for any solid separator. Kristina Pflanz Writer & Contractor, Advanced Research Projects Agency - Energy What does this mean for me? With its all-liquid design, this battery is much more efficient than today's rechargeable batteries, which use 80-90% of the space to hold

411

Neutron Scattering from Liquid Helium at Large Momentum Transfer  

Science Journals Connector (OSTI)

......letter Letters to the Editor Neutron Scattering from Liquid Helium at Large...Vol. 46 (1971), No. 1 Neutron Scattering from Liquid Helium at Large...Feynman diagram for the elastic scattering of a neutron from liquid helium, where......

Sigenobu Sunakawa; Kazuo Okajima; Kiyohisa Matsuda

1971-07-01T23:59:59.000Z

412

Infinite dilution activity coefficient and vapour liquid equilibrium measurements for dimethylsulphide and tetrahydrothiophene with hydrocarbons  

Science Journals Connector (OSTI)

The activity coefficients at infinite dilution (??) of dimethylsulphide (DMS) in four hydrocarbon solvents were measured using the dilutor technique at temperatures between 288 K and 303 K. The four hydrocarbons were hexane, 1-hexene, 2,2,4-trimethylpentane and 2,4,4-trimethyl-1-pentene. The dilutor technique is based on the stripping of the highly diluted solute, i.e. DMS, by a constant flow of inert gas. The gas composition was analysed by gas chromatography and the rate of solute removal was calculated from the area of the peaks. In addition, a static total pressure apparatus was used to measure the vapour–liquid equilibrium of the binary systems of propane + DMS and propane + tetrahydrothiophene at 293 K and 313 K. In the static total pressure method, the analysis of the constituent phases is avoided. The systems’ components were injected to the equilibrium cell in known amounts. The composition of the liquid and vapour phase was calculated from the measured temperature and total pressure. The parameters for the Wilson activity coefficient model were regressed. When possible, a comparison between our experimental results and data found in the literature was performed.

Piia Haimi; Petri Uusi-Kyyny; Juha-Pekka Pokki; Ville Alopaeus

2010-01-01T23:59:59.000Z

413

Sublimation enthalpies at 298.15 K using correlation gas chromatography and differential scanning calorimetry measurements  

E-Print Network [OSTI]

Sublimation enthalpies at 298.15 K using correlation gas chromatography and differential scanning of Chemistry, University of Missouri-St. Louis, St. Louis, MO 63121, USA Received 20 June 1997; received in revised form 10 November 1997; accepted 11 November 1997 Abstract The sublimation enthalpies of 17

Chickos, James S.

414

Vapor Pressures and Vaporization Enthalpies of a Series of Dialkyl Phthalates by Correlation Gas Chromatography  

E-Print Network [OSTI]

Chromatography Chase Gobble and James Chickos* Department of Chemistry and Biochemistry University of Missouri-St. Louis, St. Louis Missouri 63121, United States Sergey P. Verevkin Department of Physical Chemistry: Experimental vapor pressures, vaporization, fusion and sublimation enthalpies of a number of dialkyl

Chickos, James S.

415

Bibliography and Index to the Literature on Gas Chromatography: January 1, 1963 to November 1, 1963  

Science Journals Connector (OSTI)

......OF HYDROGEN ISOTOPES BY GAS-SOLID...BLOOD OXYGEN DETERMINATIONS BY GAS CHROMATOGRAPHY...OF BUTENES BY BORON FLUORIDE- ACETIC...ONDARY KINETIC ISOTOPE EFFECT, Fal...1963) 395 DETERMINATION OF DISSOLVED...KETONES WITH BORON TRI- FLUORIDE...QUANTITATIVE DETERMINATION OF FORMIC......

Seaton T. Preston; Jr.; Geneva Hyder; Mignon Gill

1963-12-01T23:59:59.000Z

416

Multiresidue Analysis of Pesticides in Wool Wax and Lanolin Using Gel Permeation and Gas Chromatography  

Science Journals Connector (OSTI)

Multiresidue Analysis of Pesticides in Wool Wax and Lanolin Using Gel Permeation and Gas Chromatography ... This is a result of both the blending of different lots of raw wool before scouring and the subsequent blending of wool wax from a variety of sources to make up commercial shipments. ...

F. William Jones

1996-10-17T23:59:59.000Z

417

Journal of Chromatography A, 1154 (2007) 444453 Characterization and performance of injection molded  

E-Print Network [OSTI]

Journal of Chromatography A, 1154 (2007) 444­453 Characterization and performance of injection March 2007; accepted 30 March 2007 Available online 6 April 2007 Abstract Injection molded poly thermal/electrical properties as indicated by measurement of the current versus applied voltage (I

Cincinnati, University of

418

Fast Temperature-Programmed Gas Chromatography—Mass Spectrometry for Food Analysis  

Science Journals Connector (OSTI)

......lard, beef, and mutton tallow and palm oil) were analyzed in order to study linearity...per run. This ben- efit comes at the price of decreased resolution. The calculated...programming in gas chromatography using resistive heating. J. High Resol. Chromatogr. 22(8......

Steven W. Lloyd; Casey C. Grimm

2002-07-01T23:59:59.000Z

419

Bibliography and Index to the Literature on Gas Chromatography: January 1, 1963 to November 1, 1963  

Science Journals Connector (OSTI)

......169 QUANTITATIVE STUDY OF THE INTER...K. W., and Foster, A. B., J...IN-STREAM CONVERSION SYSTEMS FOR MEASURING...H. P., and Wheeler, Ralph J...418 PRELIMINARY STUDIES OF MOVING- BED...LITERATURE RETRIE- VAL SYSTEM FOR GAS CHROMATOGRAPHY...TRITIATED WATER, Foster, Daniel W......

Seaton T. Preston; Jr.; Geneva Hyder; Mignon Gill

1963-12-01T23:59:59.000Z

420

Carbon and Hydrogen Analyses of the Components of a Mixture Utilizing Separation-Combustion Gas Chromatography  

Science Journals Connector (OSTI)

......Utilizing Separation-Combustion Gas Chromatography...temperature copper oxide combustion tube which feeds...solution of brominated hydrocarbons (1% v/v) in...was passed into a combustion tube. Following...Wisconsin) was used to heat the combustion tube...indi- cated by the data of Table II. The......

Sam N. Pennington; Harry D. Brown

1968-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Cell Wall Chemotyping for Functional Applications of PyrolysisGas Chromatography / Mass  

E-Print Network [OSTI]

Cell Wall Chemotyping for Functional Genomics Applications of Pyrolysis­Gas Chromatography / Mass, Umeå 2012 #12;Cell Wall Chemotyping for Functional Genomics Applications of Pyrolysis.4.1 The Basic Tool-set 27 1.5 Wood Formation and Functional Genomics 31 2 Objectives 33 3 Methodological

422

Marketability and Feasibility of Chair-Side Gas Chromatography Mass Spectrometer for Dental Application  

E-Print Network [OSTI]

, the likelihood of dentists using the product aforementioned, cost structures of production and marketing, and keyMarketability and Feasibility of Chair-Side Gas Chromatography Mass Spectrometer for Dental metabolite signals when compared to caries-free sites. These signal profiles were determined using Gas

Zhou, Yaoqi

423

Theoretical and Practical Aspects of Fast Gas Chromatography and Method Translation  

Science Journals Connector (OSTI)

......by the desire to reduce cost per analysis (i.e...utilization of high-cost equipment, and fewer...increasing chemical production yields or quality, reducing fixed and variable costs associated with the business...The interest in fast gas chromatography (GC......

Matthew S. Klee; Leonid M. Blumberg

424

The Resolution of Mixtures of Carbon Dioxide and Nitrous Oxide by Gas Solid Chromatography  

Science Journals Connector (OSTI)

......1106. R. P. DeGrazio The Dow Chemical Company, Rocky Flats Division, Golden, Colorado The Resolution of Mixtures...Chromatography* by R. P. DeGrazio, The Dow Chemical Company, Rocky Flats Division, Golden, Colorado A simple and unique chromato......

R. P. DeGrazio

1965-06-01T23:59:59.000Z

425

Formation of Supercooled Liquid Solutions from Nanoscale Amorphous...  

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

Supercooled Liquid Solutions from Nanoscale Amorphous Solid Films of Methanol and Ethanol. Formation of Supercooled Liquid Solutions from Nanoscale Amorphous Solid Films of...

426

Mixing it up - Measuring diffusion in supercooled liquid solutions...  

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

Mixing it up - Measuring diffusion in supercooled liquid solutions of methanol and ethanol at temperatures near the glass Mixing it up - Measuring diffusion in supercooled liquid...

427

Ionic Liquid-Enhanced Solid State Electrolyte Interface (SEI...  

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

Liquid-Enhanced Solid State Electrolyte Interface (SEI) for Lithium Sulfur Batteries. Ionic Liquid-Enhanced Solid State Electrolyte Interface (SEI) for Lithium Sulfur Batteries....

428

Case Study: Evaluating Liquid versus Air Cooling in the Maui...  

Broader source: Energy.gov (indexed) [DOE]

Case Study: Evaluating Liquid versus Air Cooling in the Maui High Performance Computing Center Case Study: Evaluating Liquid versus Air Cooling in the Maui High Performance...

429

Creating Liquidity for Energy Efficiency Loans in Secondary Markets...  

Broader source: Energy.gov (indexed) [DOE]

Creating Liquidity for Energy Efficiency Loans in Secondary Markets Creating Liquidity for Energy Efficiency Loans in Secondary Markets Provides information on secondary markets in...

430

DOE Selects Savannah River Remediation, LLC for Liquid Waste...  

Energy Savers [EERE]

objective of the Liquid Waste contract is to achieve closure of the SRS liquid waste tanks in compliance with the Federal Facilities Agreement, utilizing the Defense Waste...

431

Oklahoma Natural Gas Plant Liquids, Expected Future Production...  

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

Plant Liquids, Expected Future Production (Million Barrels) Oklahoma Natural Gas Plant Liquids, Expected Future Production (Million Barrels) Decade Year-0 Year-1 Year-2 Year-3...

432

Computer Simulations Indicate Calcium Carbonate Has a Dense Liquid...  

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

Computer Simulations Indicate Calcium Carbonate Has a Dense Liquid Phase Computer Simulations Indicate Calcium Carbonate Has a Dense Liquid Phase Berkeley Lab research could help...

433

Elucidating graphene - Ionic Liquid interfacial region: a combined...  

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

graphene - Ionic Liquid interfacial region: a combined experimental and computational study. Elucidating graphene - Ionic Liquid interfacial region: a combined experimental and...

434

New lithium-based ionic liquid electrolytes that resist salt...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

New lithium-based ionic liquid electrolytes that resist salt concentration polarization New lithium-based ionic liquid electrolytes that resist salt concentration polarization...

435

Experimental and Modeling Studies of the Characteristics of Liquid...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

and Modeling Studies of the Characteristics of Liquid Biofuels for Enhanced Combustion Experimental and Modeling Studies of the Characteristics of Liquid Biofuels for Enhanced...

436

Ionic Liquid Pretreatment Process for Biomass Is Successfully...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Ionic Liquid Pretreatment Process for Biomass Is Successfully Implemented at Larger Scale Ionic Liquid Pretreatment Process for Biomass Is Successfully Implemented at Larger Scale...

437

Low-Emissions Burner Technology using Biomass-Derived Liquid...  

Broader source: Energy.gov (indexed) [DOE]

Emissions Burner Technology using Biomass-Derived Liquid Fuels Low-Emissions Burner Technology using Biomass-Derived Liquid Fuels This factsheet describes a project that developed...

438

Enabling Small-Scale Biomass Gasification for Liquid Fuel Production...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Enabling Small-Scale Biomass Gasification for Liquid Fuel Production Enabling Small-Scale Biomass Gasification for Liquid Fuel Production Breakout Session 2A-Conversion...

439

California Federal Offshore Natural Gas Plant Liquids, Proved...  

Gasoline and Diesel Fuel Update (EIA)

Gas Plant Liquids, Proved Reserves (Million Barrels) California Federal Offshore Natural Gas Plant Liquids, Proved Reserves (Million Barrels) Decade Year-0 Year-1 Year-2 Year-3...

440

California--State Offshore Natural Gas Plant Liquids, Expected...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Plant Liquids, Expected Future Production (Million Barrels) California--State Offshore Natural Gas Plant Liquids, Expected Future Production (Million Barrels) Decade Year-0 Year-1...

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

Louisiana Offshore Natural Gas Plant Liquids Production Extracted...  

U.S. Energy Information Administration (EIA) Indexed Site

Offshore Natural Gas Plant Liquids Production Extracted in Louisiana (Million Cubic Feet) Louisiana Offshore Natural Gas Plant Liquids Production Extracted in Louisiana (Million...

442

Federal Offshore--California Natural Gas Liquids Lease Condensate...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Liquids Lease Condensate, Proved Reserves (Million Barrels) Federal Offshore--California Natural Gas Liquids Lease Condensate, Proved Reserves (Million Barrels) Decade Year-0...

443

Lower 48 Federal Offshore Natural Gas Liquids Lease Condensate...  

U.S. Energy Information Administration (EIA) Indexed Site

Liquids Lease Condensate, Proved Reserves (Million Barrels) Lower 48 Federal Offshore Natural Gas Liquids Lease Condensate, Proved Reserves (Million Barrels) Decade Year-0 Year-1...

444

Federal Offshore--Louisiana and Alabama Natural Gas Liquids Lease...  

U.S. Energy Information Administration (EIA) Indexed Site

Liquids Lease Condensate, Proved Reserves (Million Barrels) Federal Offshore--Louisiana and Alabama Natural Gas Liquids Lease Condensate, Proved Reserves (Million Barrels) Decade...

445

California State Offshore Natural Gas Plant Liquids, Proved Reserves...  

Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

Gas Plant Liquids, Proved Reserves (Million Barrels) California State Offshore Natural Gas Plant Liquids, Proved Reserves (Million Barrels) Decade Year-0 Year-1 Year-2 Year-3...

446

California--State Offshore Natural Gas Liquids Lease Condensate...  

U.S. Energy Information Administration (EIA) Indexed Site

Liquids Lease Condensate, Proved Reserves (Million Barrels) California--State Offshore Natural Gas Liquids Lease Condensate, Proved Reserves (Million Barrels) Decade Year-0 Year-1...

447

Alabama Offshore Natural Gas Plant Liquids Production Extracted...  

Gasoline and Diesel Fuel Update (EIA)

Plant Liquids Production Extracted in Alabama (Million Cubic Feet) Alabama Offshore Natural Gas Plant Liquids Production Extracted in Alabama (Million Cubic Feet) Decade Year-0...

448

California Onshore Natural Gas Plant Liquids Production Extracted...  

U.S. Energy Information Administration (EIA) Indexed Site

Plant Liquids Production Extracted in California (Million Cubic Feet) California Onshore Natural Gas Plant Liquids Production Extracted in California (Million Cubic Feet) Decade...

449

California Onshore Natural Gas Total Liquids Extracted in California...  

U.S. Energy Information Administration (EIA) Indexed Site

Total Liquids Extracted in California (Thousand Barrels) California Onshore Natural Gas Total Liquids Extracted in California (Thousand Barrels) Decade Year-0 Year-1 Year-2 Year-3...

450

Energetics of Hydrogen Bond Network Rearrangements in Liquid...  

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

Energetics of Hydrogen Bond Network Rearrangements in Liquid Water Energetics of Hydrogen Bond Network Rearrangements in Liquid Water Print Wednesday, 25 May 2005 00:00 The unique...

451

Technical Assessment of Organic Liquid Carrier Hydrogen Storage...  

Broader source: Energy.gov (indexed) [DOE]

Technical Assessment of Organic Liquid Carrier Hydrogen Storage Systems for Automotive Applications Technical Assessment of Organic Liquid Carrier Hydrogen Storage Systems for...

452

Lower 48 Federal Offshore Natural Gas Plant Liquids, Expected...  

U.S. Energy Information Administration (EIA) Indexed Site

Plant Liquids, Expected Future Production (Million Barrels) Lower 48 Federal Offshore Natural Gas Plant Liquids, Expected Future Production (Million Barrels) Decade Year-0 Year-1...

453

Alabama (with State Offshore) Natural Gas Plant Liquids, Expected...  

U.S. Energy Information Administration (EIA) Indexed Site

Plant Liquids, Expected Future Production (Million Barrels) Alabama (with State Offshore) Natural Gas Plant Liquids, Expected Future Production (Million Barrels) Decade Year-0...

454

California (with State Offshore) Natural Gas Plant Liquids, Expected...  

U.S. Energy Information Administration (EIA) Indexed Site

Plant Liquids, Expected Future Production (Million Barrels) California (with State Offshore) Natural Gas Plant Liquids, Expected Future Production (Million Barrels) Decade Year-0...

455

Thermal bubble behaviour in liquid nitrogen under electric fields.  

E-Print Network [OSTI]

??This thesis describes thermally induced bubble behaviour changes in liquid nitrogen (LN2) under electric fields. Cryogenic liquids such as LN2 have been used not only… (more)

Wang, Ping

2008-01-01T23:59:59.000Z

456

Performance Characteristics of Coal-to-Liquids (CTL) Diesel in...  

Broader source: Energy.gov (indexed) [DOE]

Performance Characteristics of Coal-to-Liquids (CTL) Diesel in a 50-State Emissions Compliant Passenger Car Performance Characteristics of Coal-to-Liquids (CTL) Diesel in a...

457

Dielectric liquid ionization chambers for detecting fast neutrons  

E-Print Network [OSTI]

Three ionization chambers with different geometries have been constructed and filled with dielectric liquids for detection of fast neutrons. The three dielectric liquids studied were Tetramethylsilane (TMS), Tetramethylpentane ...

Boyd, Erin M

2008-01-01T23:59:59.000Z

458

Probing the Mobility of Supercooled Liquid 3-Methylpentane at...  

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

Mobility of Supercooled Liquid 3-Methylpentane at Temperatures Near the Glass Transition Using Rare Gas Permeation. Probing the Mobility of Supercooled Liquid 3-Methylpentane at...

459

Mobility of Supercooled liquid Toluene, Ethylbenzene, and Benzene...  

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

Mobility of Supercooled liquid Toluene, Ethylbenzene, and Benzene near their Glass Transition Temperatures Investigated using Mobility of Supercooled liquid Toluene, Ethylbenzene,...

460

High intensity x-ray source using liquid gallium target  

DOE Patents [OSTI]

A high intensity x-ray source that uses a flowing stream of liquid gallium as a target with the electron beam impinging directly on the liquid metal.

Smither, Robert K. (Hinsdale, IL); Knapp, Gordon S. (Cupertino, CA); Westbrook, Edwin M. (Chicago, IL); Forster, George A. (Westmont, IL)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "liquid chromatography hplc" 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

E-Print Network 3.0 - analytical chromatography methods Sample...  

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

inductively coupled plasma-mass spectrometry (IC-ICP-MS), liquid ... Source: Missouri-Rolla, University of - Laboratory for Information Technology Evaluation Collection:...

462

Vapor–liquid equilibrium for the binary systems tetrahydrothiophene + toluene and tetrahydrothiophene + o-xylene at 368.15 K and 383.15 K  

Science Journals Connector (OSTI)

Isothermal vapor–liquid equilibrium (VLE) for tetrahydrothiophene + toluene and tetrahydrothiophene + o-xylene at 368.15 K and 383.15 K was measured with a recirculation still. Liquid- and vapor-phase compositions were determined with gas chromatography. All systems exhibit a small positive deviation from Raoult's law and show nearly ideal behavior. All VLE measurements passed the point test used. The experimental results were correlated with the Wilson model and compared with COSMO-SAC predictive models. COSMO-SAC predictions show a slight negative deviation from Raoult's law for all systems measured. Raoult's law can be used to describe all systems studied. The activity coefficients at infinite dilution are presented.

Erlin Sapei; Petri Uusi-Kyyny; Kari I. Keskinen; Juha-Pekka Pokki; Ville Alopaeus

2010-01-01T23:59:59.000Z

463

Viscosity of a nanoconfined liquid during compression  

Science Journals Connector (OSTI)

The viscous behavior of liquids under nanoconfinement is not well understood. Using a small-amplitude atomic force microscope we found bulk-like viscosity in a nanoconfined weakly interacting liquid. A further decrease in viscosity was observed at confinement sizes of a just few molecular layers. Overlaid over the continuum viscous behavior we measured non-continuum stiffness and damping oscillations. The average stiffness of the confined liquid was found to scale linearly with the size of the confining tip while the damping scales with the radius of curvature of the tip end.

Edward L. Kramkowski; Peter J. Ochs; David M. Wilson

2014-01-01T23:59:59.000Z

464

Fermi liquid theory for high temperature superconductors  

SciTech Connect (OSTI)

In this article the Fermi liquid theory of metals is discussed starting from Luttinger's theorem. The content of Luttinger's Theorem and its implications for microscopic theories of high temperature superconductors are discussed. A simple quasi-2d Fermi liquid theory is introduced and some of its properties are calculated. It is argued that a number of experiments on YBa/sub 2/Cu/sub 3/O/sub 6+x/, x > 0.5, strongly suggest the existence of a Fermi surface and thereby a Fermi liquid normal state. 25 refs., 1 fig.

Bedell, K.S.

1988-01-01T23:59:59.000Z

465

Neutron Scattering by Liquid Neon  

Science Journals Connector (OSTI)

A theory for neutron scattering by a semiclassical system, which is appropriate for liquid neon, is described. The theory is based on a generalized mean-field approximation involving the polarization potential and the screened response function, similarly to what has been done previously for argon and helium. The screened response function is assumed to be a sum of Gaussian functions weighted by the momentum-distribution function. The polarization potential and the width of the Gaussians are determined by the zeroth and third moments of the scattering law. The momentum distribution has the Maxwell—Boltzmann form, but includes quantum corrections to order ?2. The quantum-mechanical zero-point energy is found to increase the kinetic energy per particle to a value of about 30% greater than the classical equipartition value. Calculations have been done for wave-vector transfers in the range 0.75-5.5 times the wave vector at the principal maximum in the static-structure factor, and the theoretical line shapes have been folded with the resolution function for the experiments of Buyers et al. Comparison of the position of the maximum, full width at half-maximum, and line shapes with the experimental results gives good agreement.

W. C. Kerr and K. S. Singwi

1973-03-01T23:59:59.000Z

466

Natural Gas Total Liquids Extracted  

U.S. Energy Information Administration (EIA) Indexed Site

Thousand Barrels) Thousand Barrels) Data Series: Natural Gas Processed Total Liquids Extracted NGPL Production, Gaseous Equivalent Period: Annual Download Series History Download Series History Definitions, Sources & Notes Definitions, Sources & Notes Show Data By: Data Series Area 2007 2008 2009 2010 2011 2012 View History U.S. 658,291 673,677 720,612 749,095 792,481 873,563 1983-2012 Alabama 13,381 11,753 11,667 13,065 1983-2010 Alaska 22,419 20,779 19,542 17,798 18,314 18,339 1983-2012 Arkansas 126 103 125 160 212 336 1983-2012 California 11,388 11,179 11,042 10,400 9,831 9,923 1983-2012 Colorado 27,447 37,804 47,705 57,924 1983-2010 Florida 103 16 1983-2008 Illinois 38 33 24 231 705 0 1983-2012

467

Liquid and liquid–gas flows at all speeds  

SciTech Connect (OSTI)

All speed flows and in particular low Mach number flow algorithms are addressed for the numerical approximation of the Kapila et al. [1] multiphase flow model. This model is valid for fluid mixtures evolving in mechanical equilibrium but out of temperature equilibrium and is efficient for material interfaces computation separating miscible and non-miscible fluids. In this context, the interface is considered as a numerically diffused zone, captured as well as all present waves (shocks, expansion waves). The same flow model can be used to solve cavitating and boiling flows [2]. Many applications occurring with liquid–gas interfaces and cavitating flows involve a very wide range of Mach number, from 10{sup ?3} to supersonic (and even hypersonic) conditions with respect to the mixture sound speed. It is thus important to address numerical methods free of restrictions regarding the Mach number. To do this, a preconditioned Riemann solver is built and embedded into the Godunov explicit scheme. It is shown that this method converges to exact solutions but needs too small time steps to be efficient. An implicit version is then derived, first in one dimension and second in the frame of 2D unstructured meshes. Two-phase flow preconditioning is then addressed in the frame of the Saurel et al. [3] algorithm. Modifications of the preconditioned Riemann solver are needed and detailed. Convergence of both single phase and two-phase numerical solutions are demonstrated with the help of single phase and two-phase steady nozzle flow solutions. Last, the method is illustrated by the computation of real cavitating flows in Venturi nozzles. Vapour pocket size and instability frequencies are reproduced by the model and method without using any adjustable parameter.

LeMartelot, S., E-mail: sebastien.lemartelot@polytech.univ-mrs.fr [Polytech'Marseille, Aix-Marseille University, UMR CNRS 7343 IUSTI, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France); Nkonga, B., E-mail: boniface.nkonga@unice.fr [RS2N, Bastidon de la Caou, 13360 Roquevaire (France); University of Nice, LJAD UMR CNRS 7351, Parc Valrose, 06108 Nice Cedex (France); Saurel, R., E-mail: richard.saurel@polytech.univ-mrs.fr [Polytech'Marseille, Aix-Marseille University, UMR CNRS 7343 IUSTI, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France); RS2N, Bastidon de la Caou, 13360 Roquevaire (France); University Institute of France, 5 rue E. Fermi, 13453 Marseille Cedex 13 (France)

2013-12-15T23:59:59.000Z

468

Studies on Uptake of Thiamin Analogs by a Thiamin Deficient E. coli Mutant Strain  

E-Print Network [OSTI]

-binding cassette AcOH Acetic acid ATP Adenosine triphosphate Calcd Calculated BtuCD Transport proteins of vitamin B12 ESI-MS Electrospray ionization mass spectrometry HBr Hydrobromic acid HMP Hydroxymethyl pyrimidine HPLC High pressure liquid chromatography... kDa Kilodalton MHz Megahertz NBD Nucleotide binding domain NMR Nuclear magnetic resonance TbpA Thiamin binding protein TDP Thiamin diphosphate ThiB Periplasmic binding protein of S. typhiurium ThiE Thiamin phosphate synthase TMD Transmembrane...

Olivard, Sarah

2012-11-28T23:59:59.000Z

469

Determination of Tramadol by Dispersive Liquid–Liquid Microextraction Combined with GC–MS  

Science Journals Connector (OSTI)

......method using nitrogen-phosphorus detection for the measurement of tramadol and its O-desmethyl metabolite in plasma and brain tissue of mice and rats. Journal of Chromatography B (2001) 763:165-171. 13 Ho S.T. , Wang J.J., Liaw W.J......

Saeed Habibollahi; Nahid Tavakkoli; Vahid Nasirian; Hossein Khani

2014-11-01T23:59:59.000Z

470

Definition: Liquid natural gas | Open Energy Information  

Open Energy Info (EERE)

Liquid natural gas Liquid natural gas Jump to: navigation, search Dictionary.png Liquid natural gas Natural gas (primarily methane) that has been liquefied by reducing its temperature to -260 degrees Fahrenheit at atmospheric pressure.[1] View on Wikipedia Wikipedia Definition Liquefied natural gas or LNG is natural gas that has been converted to liquid form for ease of storage or transport. Liquefied natural gas takes up about 1/600th the volume of natural gas in the gaseous state. It is odorless, colorless, non-toxic and non-corrosive. Hazards include flammability after vaporization into a gaseous state, freezing and asphyxia. The liquefaction process involves removal of certain components, such as dust, acid gases, helium, water, and heavy hydrocarbons, which could cause difficulty downstream. The natural gas is then condensed into a

471

LiquidMaize LLC | Open Energy Information  

Open Energy Info (EERE)

LiquidMaize LLC LiquidMaize LLC Jump to: navigation, search Name LiquidMaize, LLC Place Denver, Colorado Zip 80237 Product LiquidMaize is an ethanol development and management company that builds, owns, and operates ethanol plants within existing cattle feed-yards and dairy operations. Coordinates 39.74001°, -104.992259° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.74001,"lon":-104.992259,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

472

Phosphonium-based ionic liquids and uses  

DOE Patents [OSTI]

Phosphonium-based room temperature ionic liquids ("RTILs") were prepared. They were used as matrices for Matrix-Assisted Laser Desorption Ionization (MALDI) mass spectrometry and also for preparing samples of dyes for analysis.

Del Sesto, Rico E; Koppisch, Andrew T; Lovejoy, Katherine S; Purdy, Geraldine M

2014-12-30T23:59:59.000Z

473

Viscosity of Liquids and Colloidal Solutions  

Science Journals Connector (OSTI)

... conference it was decided to hold a further conference, in the following year, on "Viscosity of Liquids and Colloidal Solutions". This took place just before the German invasion and ...

G. W. SCOTT BLAIR

1945-08-04T23:59:59.000Z

474

Removal of arsenic compounds from petroliferous liquids  

DOE Patents [OSTI]

Described is a process for removing arsenic from petroliferous derived liquids by contacting said liquid at an elevated temperature with a divinylbenzene-crosslinked polystyrene having catechol ligands anchored thereon. Also, described is a process for regenerating spent catecholated polystyrene by removal of the arsenic bound to it from contacting petroliferous liquid as described above and involves: a. treating said spent catecholated polystyrene, at a temperature in the range of about 20.degree. to 100.degree. C. with an aqueous solution of at least one carbonate and/or bicarbonate of ammonium, alkali and alkaline earth metals, said solution having a pH between about 8 and 10 and, b. separating the solids and liquids from each other. Preferably the regeneration treatment is in two steps wherein step (a) is carried out with an aqueous alcoholic carbonate solution containing lower alkyl alcohol, and, steps (a) and (b) are repeated using a bicarbonate.

Fish, Richard H. (Berkeley, CA)

1985-01-01T23:59:59.000Z

475

Analyzing Biomass Conversion into Liquid Hydrocarbons  

Science Journals Connector (OSTI)

Variants of the Fischer–Tropsch producer-gas conversion into liquid hydrocarbons are analyzed under the ... is attained in the reactions occurring in the biomass gasification. When the raw material is wood ... th...

V. D. Meshcheryakov; V. A. Kirillov

2002-09-01T23:59:59.000Z

476

Liquid metal cooled divertor for ARIES  

SciTech Connect (OSTI)

A liquid metal, Ga-cooled divertor design was completed for the double null ARIES-II divertor design. The design analysis indicated a surface heat flux removal capability of up to 15 MW/m{sup 2}, and its relative easy maintenance. Design issues of configuration, thermal hydraulics, thermal stresses, liquid metal loop and safety effects were evaluated. For coolant flow control, it was found that it is necessary to use some part of the blanket cooling ducts for the draining of liquid metal from the top divertor. In order to minimize the inventory of Ga, it was recommended that the liquid metal loop equipment should be located as close to the torus as possible. More detailed analysis of transient conditions especially under accident conditions was identified as an issue that will need to be addressed.

Muraviev, E. [Gosudarstvennyj Komitet po Ispol`zovaniyu Atomnoj Ehnergii SSSR, Moscow (Russian Federation). Inst. Atomnoj Ehnergii

1995-01-01T23:59:59.000Z

477

Liquid Fuels from Biomass | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuels from Biomass Liquid Fuels from Biomass Presentation given at DEER 2006, August 20-24, 2006, Detroit, Michigan. Sponsored by the U.S. DOE's EERE FreedomCar and Fuel...

478

AEO 2013 Liquid Fuels Markets Working Group  

Gasoline and Diesel Fuel Update (EIA)

last year but will be this year It is a cap and trade system for Green House Gas (GHG) It is anticipated to affect prices, production and more than just liquid fuels Carbon...

479

Photo-responsive liquid crystal block copolymers/  

E-Print Network [OSTI]

Photo-responsive liquid crystal polymers (LCP) which contain azobenzene moieties have gained interest for their ability to change properties by merely irradiating them with the correct wavelength of light in the appropriate ...

Petr, Michael Thomas

2012-01-01T23:59:59.000Z

480

SRS Liquid Waste Program Partnering Agreement  

Broader source: Energy.gov [DOE]

We the members of the  SRS Liquid Waste Partnering Team do hereby mutually agree to work in a collaborative and cooperative manner through open communication and coordination with team members, and...

Note: This page contains sample records for the topic "liquid chromatography hplc" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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481

Alternative Liquid Fuels (ALF) | Open Energy Information  

Open Energy Info (EERE)

Fuels (ALF) Jump to: navigation, search Name: Alternative Liquid Fuels (ALF) Address: P.O. Box 76 Place: McArthur, Ohio Zip: 45651 Sector: Biofuels, Renewable Energy, Services...

482

Accelerated Animation of Liquid Splash Roman Durikovic  

E-Print Network [OSTI]

step and viscosity. The final liquid surface is obtained from the velocity field by rough estimation small fluid objects such as splash and spray. Our final goal is to develop a real-time system

Durikovic, Roman

483

Doppler effect in light scattering in liquids  

Science Journals Connector (OSTI)

The present work deals with the study of the state of polarisation of the three components observed in the spectrum of monochromatic light scattered by liquid formic and acetic acids, when examined with a Fabr...

B. V. Raghavendra Rao

1936-06-01T23:59:59.000Z

484

Goethite liquid crystals and magnetic field effects.  

E-Print Network [OSTI]

??In this thesis the liquid crystal phase behavior of colloidal, boardlike, goethite (alpha-FeOOH) particles is described. Apart from the nematic phase, a smectic A phase… (more)

Pol, E. van den

2010-01-01T23:59:59.000Z

485

Magnetism in Heavy-Electron Liquids  

Science Journals Connector (OSTI)

......Theoretical Physics February 1992 research-article Articles Magnetism in Heavy-Electron Liquids Fusayoshi J. Ohkawa Department...d expansion to paramagnons, metamagnetism, tiny-moment magnetism, and other topics are presented. Citing Article(s......

Fusayoshi J. Ohkawa

1992-02-01T23:59:59.000Z

486

Hydrogen from Bio-Derived Liquids (Presentation)  

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

From Bio-Derived Liquids From Bio-Derived Liquids Hydrogen From Bio Hydrogen From Bio - - Derived Liquids Derived Liquids Dave King, Yong Wang, PNNL BILIWIG Meeting Laurel, Maryland November 6, 2007 Innovation / Overview Innovation / Overview Innovation / Overview Project comprises two components z Ethanol steam reforming z Aqueous phase reforming (APR) Importance to small scale hydrogen production for distributed reforming for hydrogen production ‹ Ethanol is rapidly becoming an infrastructure fuel and is a logical feedstock ‹ APR provides vehicle for facile reforming of a variety of bio-derived feedstocks available in the biorefinery that are not conducive to conventional vapor phase reforming Distinctive technology approach/innovation z We are investigating single step ethanol reforming with emphasis on lower

487

Optical constants of liquid and solid methane  

Science Journals Connector (OSTI)

The optical constants nr + ini of liquid methane and phase I solid methane were determined over the entire spectral range by the use of various data sources published in the...

Martonchik, John V; Orton, Glenn S

1994-01-01T23:59:59.000Z

488

Liquid--liquid equilibria by use of UNIFAC for gasohol extraction systems  

SciTech Connect (OSTI)

A synthetic naphtha cut composed of a mixture of paraffinic, aromatic, and naphthenic hydrocarbons has been studied as a solvent to directly produce gasohol. The equilibria in these highly nonideal liquid mixtures has been estimated by the UNIFAC group contribution method. The process would appear to be simple and direct to produce gasohol by liquid--liquid extraction with this naphtha and could compete with existing azeotropic distillation processes.

Furzer, I.A.

1984-04-01T23:59:59.000Z

489

Bubble departure in the direct-contact boiling field with a continuous liquid-liquid interface  

SciTech Connect (OSTI)

Behavior of vapor bubbles was experimentally investigated in the boiling field where a volatile liquid layer of per-fluorocarbon PF5050 (boiling point 306K) was directly in contact with an immiscible hot liquid layer of water above it. Heat was supplied to the continuous liquid-liquid interface by the impingement of the downward hot water jet. Vapor bubbles were generated not only from this continuous interface but from a large number of PF5050 droplets floating on it. According to precise observation, incipience of boiling did not occur at the liquid-liquid interface but in the PF5050 liquid close to the interface in both cases of continuous and dispersed interfaces. As a result, the bubbles broke up the thin PF5050 liquid film above them and rose up into the water layer. This bubble departure phenomenon, which does not occur in the ordinary pool boiling field on the solid heating wall, is very important to evaluate the heat transfer performance in the present direct-contact boiling system. For modeling this behavior, sizes of the bubbles were measured at the moment just after they were released into the water pool. Volumes of the bubbles were larger in the case of departing from the continuous liquid-liquid interface than from the droplets. This tendency could be explained by taking into account the buoyancy force acting on unit area of the thin PF5050 liquid film above the bubble before departure, which was one of the most important parameters for the liquid film breakdown. (author)

Kadoguchi, Katsuhiko [Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 16-1 Onogawa, Tsukuba, Ibaraki 305-8569 (Japan)

2007-01-15T23:59:59.000Z

490

Superbase-derived protic ionic liquids  

DOE Patents [OSTI]

Protic ionic liquids having a composition of formula (A.sup.-)(BH.sup.+) wherein A.sup.- is a conjugate base of an acid HA, and BH.sup.+ is a conjugate acid of a superbase B. In particular embodiments, BH.sup.+ is selected from phosphazenium species and guanidinium species encompassed, respectively, by the general formulas: ##STR00001## The invention is also directed to films and membranes containing these protic ionic liquids, with particular application as proton exchange membranes for fuel cells.

Dai, Sheng; Luo, Huimin; Baker, Gary A.

2013-09-03T23:59:59.000Z

491

The absorption of ultrasonic waves in liquids  

E-Print Network [OSTI]

Vee ~ ~ ~ ~ a ~ ~ ~ ~ ~ ~ a ~ e ~ ~ ~ ~ a ~ ~ ea ~ ~ ~ eee ~ ~ ~ ~ ~ ~ ea ~ ~ ~ ~ 2 ~ ?easursasnt of ths Prop-:. ties of:asss and Liquids by Ultrasonicseae ~ ~ ~ ~ ~ e ~ ~ ~ ~ ~ ~ ~ ~ e ~ ~ dies Borne erscsnt Theories ConcsrrrinS the Oisorsparrcy 3e tween... ~ ~ ~ ~ ~ ~ ~ o 3Q VI, Plot of' Los A /A vs~ Sound Path Length Ital ZthoI' 1Mox' Ppoalul'oe ~ ~ a ~ y ~ ~ s ~ ~ ~ ~ ~ ~ e ~ ~ ~ e s ~ ~ ~ ~ e ~ ~ a ~ ~ 3) xxeasuraaents oa the absorption of high frequency souad. waves ia liquids axe useful ia studying...

Hudson, Paul A

2012-06-07T23:59:59.000Z

492

Elimination of liquid discharge to the environment from the TA-50 Radioactive Liquid Waste Treatment Facility  

SciTech Connect (OSTI)

Alternatives were evaluated for management of treated radioactive liquid waste from the radioactive liquid waste treatment facility (RLWTF) at Los Alamos National Laboratory. The alternatives included continued discharge into Mortandad Canyon, diversion to the sanitary wastewater treatment facility and discharge of its effluent to Sandia Canyon or Canada del Buey, and zero liquid discharge. Implementation of a zero liquid discharge system is recommended in addition to two phases of upgrades currently under way. Three additional phases of upgrades to the present radioactive liquid waste system are proposed to accomplish zero liquid discharge. The first phase involves minimization of liquid waste generation, along with improved characterization and monitoring of the remaining liquid waste. The second phase removes dissolved salts from the reverse osmosis concentrate stream to yield a higher effluent quality. In the final phase, the high-quality effluent is reused for industrial purposes within the Laboratory or evaporated. Completion of these three phases will result in zero discharge of treated radioactive liquid wastewater from the RLWTF.

Moss, D.; Williams, N.; Hall, D.; Hargis, K.; Saladen, M.; Sanders, M.; Voit, S.; Worland, P.; Yarbro, S.

1998-06-01T23:59:59.000Z

493

Hydrotreating of coal-derived liquids  

SciTech Connect (OSTI)

The objective of Sandia`s refining of coal-derived liquids project is to determine the relationship between hydrotreating conditions and Product characteristics. The coal-derived liquids used in this work were produced In HTI`s first proof-of-concept run using Illinois No. 8 coal. Samples of the whole coal liquid product, distillate fractions of this liquid, and Criterion HDN-60 catalyst were obtained from Southwest Research Inc. Hydrotreating experiments were performed using a continuous operation, unattended, microflow reactor system. A factorial experimental design with three variables (temperature, (310{degrees}C to 388{degrees}C), liquid hourly space velocity (1 to 3 g/h/cm{sup 3}(cat)), pressure (500 to 1000 psig H{sub 2}) is being used in this project. Sulfur and nitrogen contents of the hydrotreated products were monitored during the hydrotreating experiments to ensure that activity was lined out at each set of reaction conditions. Results of hydrotreating the whole coal liquid showed that nitrogen values in the products ranged from 549 ppM at 320{degrees}C, 3 g/h/cm{sup 3}(cat), 500 psig H{sub 2} to <15 ppM at 400{degrees}C, 1 g/h/ cm{sup 3}(cat), 1000 psig H{sub 2}.

Stohl, F.V.; Lott, S.E.; Diegert, K.V.; Goodnow, D.C.; Oelfke, J.B.

1995-06-01T23:59:59.000Z

494

Process for stabilization of coal liquid fractions  

DOE Patents [OSTI]

Coal liquid fractions to be used as fuels are stabilized against gum formation and viscosity increases during storage, permitting the fuel to be burned as is, without further expensive treatments to remove gums or gum-forming materials. Stabilization is accomplished by addition of cyclohexanol or other simple inexpensive secondary and tertiary alcohols, secondary and tertiary amines, and ketones to such coal liquids at levels of 5-25% by weight with respect to the coal liquid being treated. Cyclohexanol is a particularly effective and cost-efficient stabilizer. Other stabilizers are isopropanol, diphenylmethanol, tertiary butanol, dipropylamine, triethylamine, diphenylamine, ethylmethylketone, cyclohexanone, methylphenylketone, and benzophenone. Experimental data indicate that stabilization is achieved by breaking hydrogen bonds between phenols in the coal liquid, thereby preventing or retarding oxidative coupling. In addition, it has been found that coal liquid fractions stabilized according to the invention can be mixed with petroleum-derived liquid fuels to produce mixtures in which gum deposition is prevented or reduced relative to similar mixtures not containing stabilizer.

Davies, Geoffrey (Boston, MA); El-Toukhy, Ahmed (Alexandria, EG)

1987-01-01T23:59:59.000Z

495

SEAPORT LIQUID NATURAL GAS STUDY  

SciTech Connect (OSTI)

The Seaport Liquid Natural Gas Study has attempted to evaluate the potential for using LNG in a variety of heavy-duty vehicle and equipment applications at the Ports of Los Angeles and Oakland. Specifically, this analysis has focused on the handling and transport of containerized cargo to, from and within these two facilities. In terms of containerized cargo throughput, Los Angeles and Oakland are the second and sixth busiest ports in the US, respectively, and together handle nearly 4.5 million TEUs per year. At present, the landside handling and transportation of containerized cargo is heavily dependent on diesel-powered, heavy-duty vehicles and equipment, the utilization of which contributes significantly to the overall emissions impact of port-related activities. Emissions from diesel units have been the subject of increasing scrutiny and regulatory action, particularly in California. In the past two years alone, particulate matter from diesel exhaust has been listed as a toxic air contaminant by CAM, and major lawsuits have been filed against several of California's largest supermarket chains, alleging violation of Proposition 65 statutes in connection with diesel emissions from their distribution facilities. CARE3 has also indicated that it may take further regulatory action relating to the TAC listing. In spite of these developments and the very large diesel emissions associated with port operations, there has been little AFV penetration in these applications. Nearly all port operators interviewed by CALSTART expressed an awareness of the issues surrounding diesel use; however, none appeared to be taking proactive steps to address them. Furthermore, while a less controversial issue than emissions, the dominance of diesel fuel use in heavy-duty vehicles contributes to a continued reliance on imported fuels. The increasing concern regarding diesel use, and the concurrent lack of alternative fuel use and vigorous emissions reduction activity at the Ports provide both the backdrop and the impetus for this study.

COOK,Z.

1999-02-01T23:59:59.000Z

496

Ion Transport in Nanostructured Block Copolymer/Ionic Liquid Membranes  

E-Print Network [OSTI]

E. Ionic Liquids as Green Solvents: Progress and Prospectsthem attention as “green” solvents for synthesis and

Hoarfrost, Megan Lane

2012-01-01T23:59:59.000Z

497

Solvent-Resistant Photocurable "Liquid Teflon" for Microfluidic Device Fabrication  

E-Print Network [OSTI]

with photocurable perfluoropolyethers (PFPEs). PFPEs are a unique class of fluoropolymers that are liquids at room

Quake, Stephen R.

498

Comparison of performance characteristics of liquid biofuels and petroleum fuels  

Science Journals Connector (OSTI)

The performance properties of different types of liquid biofuels (bioalcohols, biodiesel, etc.) are examined...

K. E. Pankin; Yu. V. Ivanova; R. I. Kuz’mina…

2011-05-01T23:59:59.000Z

499

ccsd00001732, Development behavior of liquid plasma produced by  

E-Print Network [OSTI]

water with a melted NaCl is used as a test liquid. The liquid plasma is produced by the fundamental waveccsd­00001732, version 2 ­ 7 Nov 2004 Development behavior of liquid plasma produced by YAG laser the hazardous material called the environment material. Then, the plasma produced in liquid by the laser light

500

Essays on Bank Optimal Portfolio Choice under Liquidity Constraint  

E-Print Network [OSTI]

that the bank securities business produces a chasm between a real liquidity of economy and market liquidity. Banks can have more liquidity by selling their securitized loans, and as our model already pointed out, a good liquidity condition makes the bank have...

Kim, Eul Jin

2012-10-19T23:59:59.000Z