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Note: This page contains sample records for the topic "tracer prep blanks" 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.


1

Prep plant population rebounds  

SciTech Connect (OSTI)

Demand and higher prices allows more operators to build and upgrade plants. The 2005 US Prep Plant Census found that the number of coal preparation plants has grown from 212 to 265 in five years - a 53 plant gain or a 20% increase over that reported by Coal Age in 2000. The number of bituminous coal washing facilities grew by 43 to 250. The article discusses the survey and the companies involved and presents a table giving key details of plants arranged by state. 6 tabs.

Fiscor, S.

2005-10-01T23:59:59.000Z

2

THIS PAGE INTENTIONALLY LEFT BLANK  

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

THIS PAGE INTENTIONALLY LEFT BLANK THIS PAGE INTENTIONALLY LEFT BLANK i U.S. DEPARTMENT OF ENERGY CRITICAL MATERIALS STRATEGY DECEMBER 2011 ii THIS PAGE INTENTIONALLY LEFT BLANK iii TABLE OF CONTENTS FOREWORD ........................................................................................................................................................... 1 ACKNOWLEDGEMENTS .......................................................................................................................................... 2 EXECUTIVE SUMMARY ........................................................................................................................................... 3 CHAPTER 1. INTRODUCTION .................................................................................................................................. 8

3

WWF-Climate Prep | Open Energy Information  

Open Energy Info (EERE)

Prep Prep Jump to: navigation, search Name WWF-Climate Prep Agency/Company /Organization World Wildlife Fund Sector Climate Topics Background analysis, Low emission development planning Resource Type Case studies/examples, Lessons learned/best practices, Training materials Website http://www.climateprep.org/abo References WWF-Climate Prep[1] Abstract ClimatePrep.org aims to define climate change adaptation through illustrations of on-the-ground adaptation projects, explorations of adaptation concepts, and sharing lessons learned from work around the world. WWF-Climate Prep Screenshot "ClimatePrep.org aims to define climate change adaptation through illustrations of on-the-ground adaptation projects, explorations of adaptation concepts, and sharing lessons learned from work around the

4

Safety System Oversight Staffing Analysis (Instructions, Blank...  

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

Safety System Oversight Staffing Analysis (Instructions, Blank Sheet and Example Sheet) Safety System Oversight Staffing Analysis (Instructions, Blank Sheet and Example Sheet) This...

5

MSU Faculty Advisor's Checklist Prepping for Advising  

E-Print Network [OSTI]

MSU Faculty Advisor's Checklist Prepping for Advising Ã? Read the Advising chapter in the New Faculty Handbook and "Reminders for Advisors" flyer. Ã? Get to know the Advisor's Toolkit. Ã? Look over semester (in Advisor's Toolkit). Ã? Become familiar with Advisor Dashboard (MyInfo>Secure Area

Dyer, Bill

6

TAMU Online ESL Certification Prep Course  

E-Print Network [OSTI]

SSI) and Title III funds through the Texas Education Agency. Department of Educational Psychology College of Education & Human Development Texas A&M University Presentation Overview ? Online ESL Certification Course?Overview ? Course... ESL Certification Prep Course Department of Educational Psychology College of Education & Human Development Texas A&M University Funding Source This training is made possible by the Limited English Proficient, Student Success Initiative (LEP...

Lara-Alecio, Rafael; Treviño, Polly; Tong, Fuhui

2010-10-22T23:59:59.000Z

7

Tracers and Tracer Interpretation | Open Energy Information  

Open Energy Info (EERE)

Tracers and Tracer Interpretation Tracers and Tracer Interpretation Jump to: navigation, search Contents 1 Geothermal Lab Call Projects for Tracers and Tracer Interpretation 2 Geothermal ARRA Funded Projects for Tracers and Tracer Interpretation Geothermal Lab Call Projects for Tracers and Tracer Interpretation Loading map... {"format":"googlemaps3","type":"ROADMAP","types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"limit":200,"offset":0,"link":"all","sort":[""],"order":[],"headers":"show","mainlabel":"","intro":"","outro":"","searchlabel":"\u2026

8

Recreation Strategic Plan Page left intentionally blank  

E-Print Network [OSTI]

Recreation Strategic Plan April 2011 #12;Page left intentionally blank #12;CECW-CO DEPARTMENT AND DISTRICTS SUBJECT: U.S. Army Corps ofEngineers National Recreation Program Strategic Plan 1. The enclosed USACE National Recreation Program Strategic Plan provides long-term guidance for our recreation program

US Army Corps of Engineers

9

Prepping Power Engineers for the Smart Grid | Department of Energy  

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

Prepping Power Engineers for the Smart Grid Prepping Power Engineers for the Smart Grid Prepping Power Engineers for the Smart Grid June 19, 2012 - 4:01pm Addthis This video examines electrostatic induction, a phenomenon that means a conductive object in the vicinity of a power line may have energy coupled to it even if it's not connected to the line. Check out the other videos created by the partnership Bonneville Power Administration, Washington State University and the Northwest Workforce Training Center for Electric Power Engineering on their Smart Grid YouTube playlist. Joel Scruggs Public Affairs Specialist, Bonneville Power Administration BPA's High Voltage Lab: Ever wonder why electricity makes power lines sag? This video explains why. Check out the Smart Grid Workforce playlist for other videos from

10

Prep mode rack kits for Frac-950 Instructions  

E-Print Network [OSTI]

Prep mode rack kits for Frac-950 Instructions Edition AB 56-3153-30 Installing the rack Assembling the rack Make sure that the guide pin fits! Place the guide pin legs at the side with the bulge! 1 2 3

Pawlowski, Wojtek

11

RDS and Recycling Waste Diversion in Food Prep  

E-Print Network [OSTI]

RDS and Recycling Waste Diversion in Food Prep Setting #12;Why Recycle? Recycling saves resources Recycling one ton of paper saves 17 trees! Recycling saves energy Recycling one aluminum can saves enough energy to power a television for 3 hours! Recycling is easy There are 4 waste categories here at UM

Awtar, Shorya

12

Tracers and Exploration Technologies  

Broader source: Energy.gov [DOE]

Below are the project presentations and respective peer review results for Tracers and Exploration Technologies.

13

) Leave Blank (NARA Use Only) I  

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

for Records Disposition Authority 1 for Records Disposition Authority 1 ) Leave Blank (NARA Use Only) I (See lnstruct~ons on reverse) To: National Archives and Records Administration (NIR) Washington, DC 20408 1 From (Agency or establishment) Department of Energy 2. Major Subdivision Idaho Operations Office 3. Minor Subdivis~on I 4 Name of Person with whom to confer / 5 Tele~hone (include area code) l ~ o b Number N / - '13v-08-/ Date Rece~ved /J /07 I Notification to Agency In accordance with the provisions of 44 U.S.C. 3303a, the disposition request. in- cluding amendments, is approved except for items that may be marked "disposition not approved" or "withdrawn" in column 10. 1 ~ a t e / Archivist of the United States I I hereby certify that I am authorized to act for this agency in matters pertaining to the disposition of its records and that the records proposed

14

Blank fire configuration for automatic pistol  

DOE Patents [OSTI]

A pistol configured to fire blank cartridges includes a modified barrel with a breech portion connected to an aligned inner sleeve. Around the inner sleeve, there is disposed an outer sleeve having a vent therein through which the cartridge discharges. The breech portion is connected to a barrel anchor to move backward in a slight arc when the pistol is fired. A spring retention rod projects from the barrel anchor and receives a shortened recoil spring therearound which recoil spring has one end abutting a stop on the barrel anchor and the other end in abutment with the end of a spring retaining cup. The spring retaining cup is engaged by a flange projecting from a slide so that when the pistol is fired, the slide moves rearwardly against the compression of the spring to eject the spent cartridge and then moves forwardly under the urging of the spring to load a fresh cartridge into the breech portion. The spring then returns all of the slidable elements to their initial position so that the pistol may again be fired.

Teague, Tommy L. (Albuquerque, NM)

1990-01-01T23:59:59.000Z

15

Category:Tracer Testing | Open Energy Information  

Open Energy Info (EERE)

Tracer Testing page? For detailed information on Tracer Testing, click here. Category:Tracer Testing Add.png Add a new Tracer Testing Technique Pages in category "Tracer Testing"...

16

Blank optimization in sheet metal forming using finite element simulation  

E-Print Network [OSTI]

The present study aims to determine the optimum blank shape design for the deep drawing of arbitrary shaped cups with a uniform trimming allowance at the flange i.e. cups without ears. This earing defect is caused by planar anisotropy in the sheet...

Goel, Amit

2006-04-12T23:59:59.000Z

17

(This page intentionally left blank.) Corrective Action Plan  

E-Print Network [OSTI]

: Radiation Protection....................................................................34 Finding C4#12;(This page intentionally left blank.) #12;#12;#12;Corrective Action Plan to the Independent line from "Develop plan to communicate action D1-3" to "Develop plan to communicate action D1-2" 4

18

Tracer Testing | Open Energy Information  

Open Energy Info (EERE)

Tracer Testing Tracer Testing Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Technique: Tracer Testing Details Activities (9) Areas (5) Regions (0) NEPA(0) Exploration Technique Information Exploration Group: Downhole Techniques Exploration Sub Group: Well Testing Techniques Parent Exploration Technique: Well Testing Techniques Information Provided by Technique Lithology: Stratigraphic/Structural: Fracture zones and formation permeability Hydrological: Flow rates, flow direction, hydrologic connections, storativity Thermal: Dictionary.png Tracer Testing: A method based on injecting chemical tracers into the reservoir and monitoring how long it takes and where those tracers travel. The purpose is to model subsurface hydrothermal flow characteristics.

19

Ready, Set . . . Get Prepped for Monday's Launch of the 'America's Next  

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

Ready, Set . . . Get Prepped for Monday's Launch of the Ready, Set . . . Get Prepped for Monday's Launch of the 'America's Next Top Energy Innovator' Challenge Ready, Set . . . Get Prepped for Monday's Launch of the 'America's Next Top Energy Innovator' Challenge April 29, 2011 - 10:35am Addthis Ginny Simmons Ginny Simmons Former Managing Editor for Energy.gov, Office of Public Affairs The 'America's Next Top Energy Innovator' Challenge will begin on May 2. That means that starting on Monday, and continuing through December 15, entrepreneurs and start-up companies will be able to apply for any of the Department of Energy's 15,000 unlicensed patents at a greatly reduced cost and with much less paperwork. Since Secretary Chu announced the challenge at the end of March our phones have been ringing and our email inboxes have been piling up with questions

20

Design and analysis of recycled content sign blanks  

E-Print Network [OSTI]

/3. 66 m length Uniform gray ASTM D638 ASTM D638 ASTM D790 ASTM D790 ASTM D695 ASTM D695 ASTM D732 ASTM D256 ASTM D648 ASTM D3841 ASTM D696 ASTM D3841 2. 4 REVIEW OF RESEARCH ON RECYCLED SIGN BLANK SUBSTRATES 2. 4. 1 Aluminum... Properties Physical Specific Gravity Testing Standard (2) ASTM D 792-91 0. 7 Minimum Test Performance (3) Comments (4) Sofiening Point Flash Ignition Flame Spread Oassification Smoke Developed Classincation Decay Resistance Termite Resisimce...

Harrison, Ben Frank

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Black Bear Prep plant replaces high-frequency screens with fine wire sieves  

SciTech Connect (OSTI)

At the Black Bear prep plant (near Wharncliffe, WV, USA) the clean coal from the spirals traditionally reported to high-frequency screens, which removed high-ash clay fines. Screens have inherent inefficiencies that allow clean coal to report to the screen underflow. The goal of this project was to capture the maximum amount of spiral clean coal while still removing the high-ash clay material found in the spiral product. The reduction of the circulating load and plant downtime for unscheduled maintenance were projected as additional benefits. After the plant upgrade, the maintenance related to the high frequency screens was eliminated and an additional 2.27 tons per hour (tph) of fine coal was recovered, which resulted in a payback period of less than one year. The article was adapted from a paper presented at Coal Prep 2007 in April 2007, Lexington, KY, USA. 1 ref., 1 fig., 1 tab.

Barbee, C.J.; Nottingham, J.

2007-12-15T23:59:59.000Z

22

BNL | Tracer Technology Group | BNL  

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

Tracer Technology Group Tracer Technology Group Tracer Technology Image The Tracer Technology Group (TTG) developed the use of perfluorocarbon tracers (PFTs) as tools for studying long range atmospheric transport and dispersion in the early 1980s.We are world leaders in the use of PFTs for solving diverse research and engineering problems in the atmospheric sciences, the energy production and utility industries, and building characterization. The unique capabilities of the TTG are derived from our analytical expertise, infrastructure, and experience. We have developed PFT analytical methods that have detection limits at the femtogram level. We can measure global background levels of PFTS at the parts per quadrillion levels. Our scientists and technical staff have extensive experience in

23

A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene  

Open Energy Info (EERE)

Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Sulfonate as a Liquid-Phase Tracer at the Coso Geothermal Field Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Sulfonate as a Liquid-Phase Tracer at the Coso Geothermal Field Details Activities (1) Areas (1) Regions (0) Abstract: A tracer test was conducted at the Coso geothermal field in order to characterize the flow patterns of fluid injected into well 68-20RD. A conservative liquid phase tracer, 2-naphthalene sulfonate, and a two-phase tracer, ethanol, were injected into well 68-20RD. Surrounding production wells were sampled over the subsequent 125 days and analyzed for the two tracers. The liquid-phase tracer showed negligible returns, whereas the

24

This page intentionally left blank. California Solar Initiative, CPUC Staff Progress Report, April 2008 2  

E-Print Network [OSTI]

.15 California Solar Initiative Supported Strong Statewide Grid-Installed Capacity Progress in 2007#12;This page intentionally left blank. California Solar Initiative, CPUC Staff Progress Report................................................................................................................ 5 2. Go Solar California! Overview

25

How to Make a Poster Using PowerPoint Start PowerPoint: Make a New presentation a blank one. When asked for a Layout, choose a blank  

E-Print Network [OSTI]

How to Make a Poster Using PowerPoint Start PowerPoint: Make a New presentation ­ a blank one. When poster: Go to File> Page Setup. A Page Setup screen will appear. In the Slides sized for option, choose Custom. Put the actual size of poster for the Height and the Width. (If printing at the TLTC, no larger

Zhang, Yuanlin

26

A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene...  

Open Energy Info (EERE)

navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: A Tracer Test Using Ethanol as a Two-Phase Tracer and 2-Naphthalene Sulfonate as a Liquid-Phase...

27

Rauchfuss Group Prep of Fe2S2(CO)6 Large Scale Synthesis of Fe2S2(CO)6.  

E-Print Network [OSTI]

Rauchfuss Group Prep of Fe2S2(CO)6 Large Scale Synthesis of Fe2S2(CO)6. A three neck, 5-liter round was filtered though a small plug of Celite to remove elemental sulfur. Solvent was removed, and the solid and reduced pressure. We do not recommend sublimation as a method of purification. IR (pentanes): 2084 (s

Rauchfuss, Thomas B.

28

Tracer Methods for Characterizing Fracture Stimulation in Engineered...  

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

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS) Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal...

29

Hydrological Tracers Using Nanobiotechnology: Proof of Concept  

Science Journals Connector (OSTI)

This new tracer is composed of polylactic acid (PLA) microspheres into which short strands of synthetic DNA and paramagnetic iron oxide nanoparticles are incorporated. ... The synthetic DNA serves as the “label” or “tag” in our tracers that allow us to distinguish one tracer from another, and paramagnetic iron oxide nanoparticles are included in the tracer to facilitate magnetic concentration of the tracers in potentially dilute water samples. ... Mahler et al.(30) attached synthetic DNA strands to silica and montmorillonite clay and measured the DNA concentration on the particles and in the supernatant over a three week period. ...

Asha N. Sharma; Dan Luo; M. Todd Walter

2012-07-25T23:59:59.000Z

30

Mogens Blanke Adjunct Professor at Centre for Ships and Ocean Structures, NTNU, Norway  

E-Print Network [OSTI]

Mogens Blanke Adjunct Professor at Centre for Ships and Ocean Structures, NTNU, Norway Professor;DTU, Denmark & CeSOS, NTNU, Norway Position Mooring ­ essential in offshore Mooring lines provide energy-free positioning They are anchored to the bottom (200-1500 m) Buoys are attached along mooring

Nørvåg, Kjetil

31

Radiological Habits Survey: Torness, 2006 This page has been intentionally left blank  

E-Print Network [OSTI]

intentionally left blank #12;3 SUMMARY 5 1. INTRODUCTION 6 1.1 Regulation of radioactive waste discharges 6 1 vegetables in the Torness area (kg/y) Table 20. Adults' consumption rates of potato in the Torness area (kg

32

Creating a poster using Powerpoint: Psych 330 [ Once you open Powerpoint, you want to work with a blank slide.  

E-Print Network [OSTI]

Creating a poster using Powerpoint: Psych 330 [ Once you open Powerpoint, you want to work with a blank slide. FORMAT: Slide Layout: Blank [ You poster will consist of just this one slide. Before adding content to the slide, set the poster size by clicking FILE: Page Setup: size: custom width: 24 height: 20

33

Microseismic Tracer Particles for Hydraulic Fracturing  

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

Microseismic Tracer Particles for Hydraulic Fracturing Microseismic Tracer Particles for Hydraulic Fracturing Microseismic Tracer Particles for Hydraulic Fracturing Scientists at Los Alamos National Laboratory have developed a method by which microseismic events can be discriminated/detected that correspond to only the portion of the hydraulic fracture that contains the proppant material and can be expected to be conductive to the flow of oil and gas. July 3, 2013 Microseismic Tracer Particles for Hydraulic Fracturing Figure 1: A graph of ionic conductivity as a function of temperature for the anti-perovskite Li3OCl. Available for thumbnail of Feynman Center (505) 665-9090 Email Microseismic Tracer Particles for Hydraulic Fracturing Applications: Oil and gas production Geophysical exploration Benefits: Tracks the disposition of material in a hydraulic fracturing

34

Tracer Methods for Characterizing Fracture Creation in Enhanced...  

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

Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems; 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing Fracture...

35

Tracer Methods for Characterizing Fracture Stimulation in Enhanced...  

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

Tracer Methods for Characterizing Fracture Stimulation in Enhanced Geothermal Systems (EGS); 2010 Geothermal Technology Program Peer Review Report Tracer Methods for Characterizing...

36

Validation of Geothermal Tracer Methods in Highly Constrained...  

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

of Research Hypothesis: Smart tracers can measure potential heat exchange between fracture and rock mass Hypothesis Test: A tracer test proving ground System must be simple...

37

Quantum Dot Tracers for Use in Engineered Geothermal | Department...  

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

tracerspeer2013.pdf More Documents & Publications Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS) Quantum Dot Tracers for Use in...

38

Blank Portrait  

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

would enable storage projects to obtain long term contracts as it did for the wind and solar industry. In California, where the PUC has mandated utilities to procure 1.3 GWs of...

39

Microsoft Word - S04040_tracer.doc  

Office of Legacy Management (LM)

Dispersivity Testing of Zero-Valent Iron Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah November 2005 Through February 2008 April 2008 DOE LM/1587 2008 - - ESL RPT 2008 02 - - - Work Performed nder DOE Contract No. for the U.S. Department of Energy Office of Legacy Management. by the S.M. Stoller Corporation u DE AM01 07LM00060 - - Approved for public release; distribution is unlimited. This page intentionally left blank DOE-LM/1587-2007 ESL-RPT-2008-02 Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah, November 2005 Through February 2008 April 2008 Work Performed by S.M. Stoller Corporation under DOE Contract No. DE-AM01-07LM00060 for the U.S. Department of Energy Office of Legacy Management, Grand Junction, Colorado This page intentionally left blank

40

Microsoft Word - S04040_tracer.doc  

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

Dispersivity Testing of Zero-Valent Iron Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah November 2005 Through February 2008 April 2008 DOE LM/1587 2008 - - ESL RPT 2008 02 - - - Work Performed nder DOE Contract No. for the U.S. Department of Energy Office of Legacy Management. by the S.M. Stoller Corporation u DE AM01 07LM00060 - - Approved for public release; distribution is unlimited. This page intentionally left blank DOE-LM/1587-2007 ESL-RPT-2008-02 Dispersivity Testing of Zero-Valent Iron Treatment Cells: Monticello, Utah, November 2005 Through February 2008 April 2008 Work Performed by S.M. Stoller Corporation under DOE Contract No. DE-AM01-07LM00060 for the U.S. Department of Energy Office of Legacy Management, Grand Junction, Colorado This page intentionally left blank

Note: This page contains sample records for the topic "tracer prep blanks" 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

Chelated Indium Activable Tracers for Geothermal Reservoirs  

E-Print Network [OSTI]

SGP-TR-99 Chelated Indium Activable Tracers for Geothermal Reservoirs Constantinos V. Chrysikopoulos Paul Kruger June 1986 Financial support was provided through the Stanford Geothermal Program under University Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD

Stanford University

42

Saturday: Lasagna and potato wedges prep time: 30mins Cooking time: 1 hr Items: 1 ice-cream container and 1 yoghurt container of white sauce  

E-Print Network [OSTI]

Saturday: Lasagna and potato wedges prep time: 30mins Cooking time: 1 hr Items: 1 ice of bean mixture (vegetarian option) 1 supermarket bag of potato wedges, pre-seasoned and cooked 3 boxes! If you want it to cook in time, DON"T OPEN THE OVEN!) The potato wedges are already cooked, so spread

Sainudiin, Raazesh

43

Protein Expression and Purification 23, 311318 (2001) doi:10.1006/prep.2001.1508, available online at http://www.idealibrary.com on  

E-Print Network [OSTI]

Protein Expression and Purification 23, 311­318 (2001) doi:10.1006/prep.2001.1508, available online aggregation but is not pyranoside. Insertion of a small oligopeptide (13 amino required for biological. the highest levels (20­22% of total proteins) with the E. coli has been the workhorse for the large-scale

44

Thermal Stability of Chelated Indium Activable Tracers  

SciTech Connect (OSTI)

The thermal stability of indium tracer chelated with organic ligands ethylenediaminetetraacetic acid (EDTA) and nitrilotriacetic acid (NTA) was measured for reservoir temperatures of 150, 200, and 240 C. Measurements of the soluble indium concentration was made as a function of time by neutron activation analysis. From the data, approximate thermal decomposition rates were estimated. At 150 C, both chelated tracers were stable over the experimental period of 20 days. At 200 C, the InEDTA concentration remained constant for 16 days, after which the thermal decomposition occurred at a measured rate constant of k = 0.09 d{sup -1}. The thermal decomposition of InNTA at 200 C showed a first order reaction with a measured rate constant of k = 0.16 d{sup -1}. At 240 C, both indium chelated tracers showed rapid decomposition with rate constants greater than 1.8 d{sup -1}. The data indicate that for geothermal reservoir with temperatures up to about 200 C, indium chelated tracers can be used effectively for transit times of at least 20 days. These experiments were run without reservoir rock media, and do not account for concomitant loss of indium tracer by adsorption processes.

Chrysikopoulos, Costas; Kruger, Paul

1986-01-21T23:59:59.000Z

45

Geologic flow characterization using tracer techniques  

SciTech Connect (OSTI)

A new tracer flow-test system has been developed for in situ characterization of geologic formations. This report describes two sets of test equipment: one portable and one for testing in deep formations. Equations are derived for in situ detector calibration, raw data reduction, and flow logging. Data analysis techniques are presented for computing porosity and permeability in unconfined isotropic media, and porosity, permeability and fracture characteristics in media with confined or unconfined two-dimensional flow. The effects of tracer pulse spreading due to divergence, dispersion, and porous formations are also included.

Klett, R. D.; Tyner, C. E.; Hertel, Jr., E. S.

1981-04-01T23:59:59.000Z

46

Method of dispersing particulate aerosol tracer  

DOE Patents [OSTI]

A particulate aerosol tracer which comprises a particulate carrier of sheet silicate composition having a particle size up to one micron, and a cationic dopant chemically absorbed in solid solution in the carrier. The carrier is preferably selected from the group consisting of natural mineral clays such as bentonite, and the dopant is selected from the group consisting of rare earth elements and transition elements. The tracers are dispersed by forming an aqueous salt solution with the dopant present as cations, dispersing the carriers in the solution, and then atomizing the solution under heat sufficient to superheat the solution droplets at a level sufficient to prevent reagglomeration of the carrier particles.

O'Holleran, Thomas P. (Belleville, MI)

1988-01-01T23:59:59.000Z

47

Tracer Testing At Coso Geothermal Area (2006) | Open Energy Information  

Open Energy Info (EERE)

Tracer Testing At Coso Geothermal Area (2006) Tracer Testing At Coso Geothermal Area (2006) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At Coso Geothermal Area (2006) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Tracer Testing Activity Date 2006 Usefulness useful DOE-funding Unknown Exploration Basis To characterize the flow patterns of fluid injected into well 68-20RD. Notes A conservative liquid phase tracer, 2-naphthalene sulfonate, and a two-phase tracer, ethanol, were injected into well 68-20RD. Surrounding production wells were sampled over the subsequent 125 days and analyzed for the two tracers. The results demonstrate the efficacy of the simultaneous use of liquid-phase and two-phase tracers in fluid-depleted geothermal

48

Validation of Geothermal Tracer Methods in Highly Constrained Field Experiments  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Project Summary. This project will test smartdiffusive tracers for measuring heat exchange.

49

Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino  

Open Energy Info (EERE)

Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino G, and Fluorescein Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino G, and Fluorescein Abstract A series of four tracer tests was recently conducted at the Dixie Valley, Nevada, geothermal reservoir in order to determine fluid-flow processes and to evaluate candidate tracers for use in hydrothermal systems. These tests have resulted in the first successful use of the compounds amino G and pyrenetetrasulfonate as tracers in a geothermal reservoir. The tracer candidates were subjected to simulated hydrothermal conditions in laboratory reactors at temperatures as high as 300°C in order to determine

50

Passive Tracer Gas Methods to Measure  

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

Experiments to Evaluate and Implement Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes Melissa Lunden, David Faulkner, Elizabeth Heredia, Sebastian Cohn, Darryl Dickerhoff, Federico Noris, Jennifer Logue, Toshifumi Hotchi, Brett Singer and Max H. Sherman Environmental Energy Technologies Division October 2012 LBNL-5984E 2 Disclaimer: This document was prepared as an account of work sponsored by the United States

51

Tracer Testing At Coso Geothermal Area (1993) | Open Energy Information  

Open Energy Info (EERE)

Tracer Testing At Coso Geothermal Area (1993) Tracer Testing At Coso Geothermal Area (1993) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At Coso Geothermal Area (1993) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Tracer Testing Activity Date 1993 Usefulness useful DOE-funding Unknown Exploration Basis To determine the steam and water mass flow rate Notes The method involves precisely metered injection of liquid and vapor phase tracers into the two-phase production pipeline and concurrent sampling of each phase downstream of the injection point. Subsequent chemical analysis of the steam and water samples for tracer content enables the calculation of mass flowrate for each phase given the known mass injection rates of

52

Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave |  

Open Energy Info (EERE)

Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave Author Andreas Kucha Published Publisher Not Provided, 2012 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave Citation Andreas Kucha. Hydrogeology of the Blautopf spring - Tracer tests in Blauhohle cave [Internet]. 2012. [cited 2013/10/17]. Available from: http://www.agw.kit.edu/english/blauhoele_cave.php Retrieved from "http://en.openei.org/w/index.php?title=Hydrogeology_of_the_Blautopf_spring_-_Tracer_tests_in_Blauhohle_cave&oldid=688895"

53

Tracer Testing At East Mesa Geothermal Area (1984) | Open Energy...  

Open Energy Info (EERE)

to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At East Mesa Geothermal Area (1984) Exploration Activity Details Location East Mesa...

54

Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate...  

Open Energy Info (EERE)

to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Tracer Testing at Dixie Valley, Nevada, Using Pyrene Tetrasulfonate Amino G, and Fluorescein...

55

Tracer Testing At Fenton Hill HDR Geothermal Area (Callahan,...  

Open Energy Info (EERE)

to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At Fenton Hill HDR Geothermal Area (Callahan, 1996) Exploration Activity Details...

56

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Using Thermally-Degrading,...

57

Integrated Approach to Use Natural Chemical and Isotopic Tracers...  

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

Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems Integrated Approach to Use Natural Chemical and...

58

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Track Name May 19, 2010 This...

59

Use of Tracers to Characterize Fractures in Engineered Geothermal...  

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

Fractures in Engineered Geothermal Systems Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface...

60

Tracer Methods for Characterizing Fracture Creation in Enhanced...  

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

75 4.6.6 Tracer Methods for Characterizing Fracture Creation in Enhanced Geothermal Systems Presentation Number: 033 Investigator: Rose, Peter (University of Utah) Objectives: To...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Quantum Dot Tracers for Use in Engineered Geothermal  

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

tracers, colloidal quantum dots, that offer great promise for use in characterizing fracture networks in EGS reservoirs. Since the wavelength of fluorescence (color) of these...

62

Verification of Geothermal Tracer Methods in Highly Constrained...  

Open Energy Info (EERE)

tracers of varying rates of molecular diffusion. Exchange of heat energy between fracture and bulk rock (matrix) behaves in the same manner as the exchange of dissolved mass....

63

Tracer Methods for Characterizing Fracture Stimulation in Enhanced...  

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

80 4.6.7 Tracer Methods for Characterizing Fracture Stimulation in Enhanced Geothermal Systems (EGS) Presentation Number: 034 Investigator: Pruess, Karsten (Lawrence Berkeley...

64

Integrated Approach to Use Natural Chemical and Isotopic Tracers...  

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

Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems B. Mack Kennedy (Presenter) and H. H. Liu Lawrence Berkeley...

65

Tracer Methods for Characterizing Fracture Stimulation in Engineered...  

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

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS) Karsten Pruess Lawrence Berkeley National Lab. May 19, 2010 This presentation does not...

66

Tracer Testing At Dixie Valley Geothermal Area (Reed, 2007) ...  

Open Energy Info (EERE)

Nevada, Using Pyrene Tetrasulfonate Amino G, and Fluorescein Peter E. Rose, Stuart D. Johnson, Phaedra Kilbourn (2001) Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene...

67

Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics  

Broader source: Energy.gov [DOE]

Novel Multidimensional Tracers for Geothermal Inter-Well Diagnostics presentation at the April 2013 peer review meeting held in Denver, Colorado.

68

The ATLAS DDM Tracer monitoring framework  

E-Print Network [OSTI]

The DDM Tracer Service is aimed to trace and monitor the atlas file operations on the Worldwide LHC Computing Grid. The volume of traces has increased significantly since the service started in 2009. Now there are about ~5 million trace messages every day and peaks of greater than 250Hz, with peak rates continuing to climb, which gives the current service structure a big challenge. Analysis of large datasets based on on-demand queries to the relational database management system (RDBMS), i.e. Oracle, can be problematic, and have a significant effect on the database's performance. Consequently, We have investigated some new high availability technologies like messaging infrastructure, specifically ActiveMQ, and key-value stores. The advantages of key value store technology are that they are distributed and have high scalability; also their write performances are usually much better than RDBMS, all of which are very useful for the Tracer service. Indexes and distributed counters have been also tested to improve...

ZANG, D; The ATLAS collaboration; BARISITS, M; LASSNIG, M; Andrew STEWART, G; MOLFETAS, A; BEERMANN, T

2012-01-01T23:59:59.000Z

69

Preliminary Investigation of Tracer Gas Reaeration Method for Shallow Bays  

E-Print Network [OSTI]

was used with propane for the tracer gas and Rhodamine-WT, a fluorescent dye, for the "conservative" tracer. The propane was injected through porous tile diffusers, and the dye was released simultaneously. The propane acts as a model for the surface...

Baker, Sarah H.; Holley, Edward R.

70

Use of Tracers to Characterize Fractures in Engineered Geothermal Systems  

Broader source: Energy.gov [DOE]

Project Objectives: Measure interwell fracture surface area and fracture spacing using sorbing tracers; measure fracture surface areas adjacent to a single geothermal well using tracers and injection/backflow techniques; design, fabricate and test a downhole instrument for measuring fracture flow following a hydraulic stimulation experiment.

71

Parallel Finite Element Simulation of Tracer Injection in Oil Reservoirs  

E-Print Network [OSTI]

Parallel Finite Element Simulation of Tracer Injection in Oil Reservoirs Alvaro L.G.A. Coutinho In this work, parallel finite element techniques for the simulation of tracer injection in oil reservoirs. Supercomputers have made it possible to consider global reservoir effects which can not be represented using

Coutinho, Alvaro L. G. A.

72

MIPAS observations of organic tracers for biomass burning and intercontinental transport  

E-Print Network [OSTI]

MIPAS observations of organic tracers for biomass burning and intercontinental transport observations of organic tracers for biomass burning and intercontinental transport Introduction Suite - Oxford - September 2009 #12;MIPAS observations of organic tracers for biomass burning

73

Methods and systems using encapsulated tracers and chemicals for reservoir interrogation and manipulation  

DOE Patents [OSTI]

An apparatus, method, and system of reservoir interrogation. A tracer is encapsulating in a receptacle. The receptacle containing the tracer is injected into the reservoir. The tracer is analyzed for reservoir interrogation.

Roberts, Jeffery; Aines, Roger D; Duoss, Eric B; Spadaccini, Christopher M

2014-11-04T23:59:59.000Z

74

Tracer Testing At East Mesa Geothermal Area (1983) | Open Energy  

Open Energy Info (EERE)

Tracer Testing At East Mesa Geothermal Area (1983) Tracer Testing At East Mesa Geothermal Area (1983) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At East Mesa Geothermal Area (1983) Exploration Activity Details Location East Mesa Geothermal Area Exploration Technique Tracer Testing Activity Date 1983 Usefulness not indicated DOE-funding Unknown Notes Two field experiments were conducted to develop chemical tracer procedures for use with injection-backflow testing, one on the fracture-permeability Raft River reservoir and the other on the matrix-permeability East Mesa reservoir. Results from tests conducted with incremental increases in the injection volume at both East Mesa and Raft River suggests that, for both reservoirs, permeability remained uniform with increasing distance from the

75

Novel Multi-dimensional Tracers for Geothermal Inter-wall Diagnostics...  

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

Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and FractureHeat Transfer Surface Area in Geothermal Reservoirs Use of Tracers to Characterize...

76

Design study of the geometry of the blanking tool to predict the burr formation of Zircaloy-4 sheet  

SciTech Connect (OSTI)

In this work, we investigated factors that influence burr formation for zircaloy-4 sheet used for spacer grids of nuclear fuel roads. Factors we considered are geometric factors of punch. We changed clearance and velocity in order to consider the failure parameters, and we changed shearing angle and corner radius of L-shaped punch in order to consider geometric factors of punch. First, we carried out blanking test with failure parameter of GTN model using L-shaped punch. The tendency of failure parameters and geometric factors that affect burr formation by analyzing sheared edges is investigated. Consequently, geometric factor's influencing on the burr formation is also high as failure parameters. Then, the sheared edges and burr formation with failure parameters and geometric factors is investigated using FE analysis model. As a result of analyzing sheared edges with the variables, we checked geometric factors more affect burr formation than failure parameters. To check the reliability of the FE model, the blanking force and the sheared edges obtained from experiments are compared with the computations considering heat transfer.

Ha, Jisun, E-mail: nskim@sogang.ac.kr; Lee, Hyungyil, E-mail: nskim@sogang.ac.kr; Kim, Dongchul, E-mail: nskim@sogang.ac.kr; Kim, Naksoo, E-mail: nskim@sogang.ac.kr [Sogang University, Department of Mechanical Engineering, Seoul, 121-742 (Korea, Republic of)

2013-12-16T23:59:59.000Z

77

The effects of composition, temperature and sample size on the sintering of chem-prep high field varistors.  

SciTech Connect (OSTI)

The sintering behavior of Sandia chem-prep high field varistor materials was studied using techniques including in situ shrinkage measurements, optical and scanning electron microscopy and x-ray diffraction. A thorough literature review of phase behavior, sintering and microstructure in Bi{sub 2}O{sub 3}-ZnO varistor systems is included. The effects of Bi{sub 2}O{sub 3} content (from 0.25 to 0.56 mol%) and of sodium doping level (0 to 600 ppm) on the isothermal densification kinetics was determined between 650 and 825 C. At {ge} 750 C samples with {ge}0.41 mol% Bi{sub 2}O{sub 3} have very similar densification kinetics, whereas samples with {le}0.33 mol% begin to densify only after a period of hours at low temperatures. The effect of the sodium content was greatest at {approx}700 C for standard 0.56 mol% Bi{sub 2}O{sub 3} and was greater in samples with 0.30 mol% Bi{sub 2}O{sub 3} than for those with 0.56 mol%. Sintering experiments on samples of differing size and shape found that densification decreases and mass loss increases with increasing surface area to volume ratio. However, these two effects have different causes: the enhancement in densification as samples increase in size appears to be caused by a low oxygen internal atmosphere that develops whereas the mass loss is due to the evaporation of bismuth oxide. In situ XRD experiments showed that the bismuth is initially present as an oxycarbonate that transforms to metastable {beta}-Bi{sub 2}O{sub 3} by 400 C. At {approx}650 C, coincident with the onset of densification, the cubic binary phase, Bi{sub 38}ZnO{sub 58} forms and remains stable to >800 C, indicating that a eutectic liquid does not form during normal varistor sintering ({approx}730 C). Finally, the formation and morphology of bismuth oxide phase regions that form on the varistors surfaces during slow cooling were studied.

Garino, Terry J.

2007-09-01T23:59:59.000Z

78

Tracer Gas Transport under Mixed Convection Conditions in an Experimental  

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

Tracer Gas Transport under Mixed Convection Conditions in an Experimental Tracer Gas Transport under Mixed Convection Conditions in an Experimental Atrium: Comparison Between Experiments and CFD Predictions Title Tracer Gas Transport under Mixed Convection Conditions in an Experimental Atrium: Comparison Between Experiments and CFD Predictions Publication Type Journal Article Year of Publication 2006 Authors Jayaraman, Buvaneswari, Elizabeth U. Finlayson, Michael D. Sohn, Tracy L. Thatcher, Phillip N. Price, Emily E. Wood, Richard G. Sextro, and Ashok J. Gadgil Journal Atmospheric Environment Volume 40 Start Page Chapter Pagination 5236-5250 Keywords airflow and pollutant transport group, atria, indoor airflow and pollutant transport, indoor environment department, indoor pollutant dispersion, mixed convection, turbulence model

79

Primordial black holes as biased tracers  

E-Print Network [OSTI]

Primordial black holes (PBHs) are theoretical black holes which may be formed during the radiation dominant era and, basically, caused by the gravitational collapse of radiational overdensities. It has been well known that in the context of the structure formation in our Universe such collapsed objects, e.g., halos/galaxies, could be considered as bias tracers of underlying matter fluctuations and the halo/galaxy bias has been studied well. Employing a peak-background split picture which is known to be a useful tool to discuss the halo bias, we consider the large scale clustering behavior of the PBH and propose an almost mass-independent constraint to the scenario that dark matters (DMs) consist of PBHs. We consider the case where the statistics of the primordial curvature perturbations is almost Gaussian, but with small local-type non-Gaussianity. If PBHs account for the DM abundance, such a large scale clustering of PBHs behaves as nothing but the matter isocurvature perturbation and constrained strictly by...

Tada, Yuichiro

2015-01-01T23:59:59.000Z

80

Tracer Testing At Raft River Geothermal Area (1984) | Open Energy...  

Open Energy Info (EERE)

84 Usefulness not indicated DOE-funding Unknown Notes Tracer testing was undertaken at Raft River geothermal area. References Kroneman, R. L.; Yorgason, K. R.; Moore, J. N. (1...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Tracer stirring around a meddy: The formation of layering  

Science Journals Connector (OSTI)

The dynamics of the formation of layering surrounding meddy-like vortex lenses is investigated using Primitive Equation (PE), Quasi Geostrophic (QG) and tracer advection models. Recent in situ data inside a meddy confirmed the formation of highly ...

Thomas Meunier; Claire Ménesguen; Richard Schopp; Sylvie Le Gentil

82

Tracer method in numerical simulation of combustion processes  

Science Journals Connector (OSTI)

Fuel-rich laminar flat hydrogen-methane-air flames are studied numerically using the tracer method. It is found that, in the near-limit mixture, hydrogen has an advantage in the oxidation by oxygen. As the sto...

V. A. Bunev; A. V. Baklanov; I. G. Namyatov…

2007-11-01T23:59:59.000Z

83

Geographic Information Systems- Tools For Geotherm Exploration, Tracers  

Open Energy Info (EERE)

Systems- Tools For Geotherm Exploration, Tracers Systems- Tools For Geotherm Exploration, Tracers Data Analysis, And Enhanced Data Distribution, Visualization, And Management Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Geographic Information Systems- Tools For Geotherm Exploration, Tracers Data Analysis, And Enhanced Data Distribution, Visualization, And Management Details Activities (4) Areas (3) Regions (0) Abstract: Geographic information systems (GIS) are an underused resource that can help the geothermal industry in exploration, tracer analysis, infrastructure management, and the general distribution and use of data. GIS systems are highly customizable to specific user needs and can use entire corporate data sets through a visual interface. This paper briefly documents the use of GIS in specific examples of geothermal research at the

84

Preferred methods of analysis for chemical tracers in moderate- and  

Open Energy Info (EERE)

Preferred methods of analysis for chemical tracers in moderate- and Preferred methods of analysis for chemical tracers in moderate- and high-temperature geothermal environments Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Preferred methods of analysis for chemical tracers in moderate- and high-temperature geothermal environments Details Activities (2) Areas (2) Regions (0) Abstract: This report describes the sampling and analytical techniques used for tracer analysis in the Raft River and East Mesa field tests. The collection procedures and sample preservation techniques, analytical methods and possible sources of contamination or error are discussed in detail. Author(s): Kroneman, R. L.; Yorgason, K. R.; Moore, J. N. Published: DOE Information Bridge, 12/1/1984 Document Number: Unavailable DOI: 10.2172/5121460

85

Quantitative interpretation of tracer test data | Open Energy Information  

Open Energy Info (EERE)

Quantitative interpretation of tracer test data Quantitative interpretation of tracer test data Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Quantitative interpretation of tracer test data Abstract Geothermal reinjection is an important part of sustainable management of geothermal resources. Reinjection started out as a method of waste-water disposal, but is now also being used to counteract pressure draw-down and to extract more thermal energy from reservoir rocks. The possible cooling of production wells, or thermal breakthrough, is one of the main disadvantages associated with injection. To minimize this danger while maintaining the benefit from reinjection requires careful testing and research. Tracer testing, which is used to study flow-paths and quantify fluid-flow in hydrological systems, is probably the most important tool for

86

Resuspension rates from aged inert-tracer sources  

SciTech Connect (OSTI)

Wind-caused particle resuspension rates were investigated with molybdenum tracers at two circular resuspension sites in the Hanford area. The tracer particles were calcium molybdate. The radii of each circular tracer-source area were 22.9 m and 29.9 m respectively for tracer deposited on 2 October 1973 and 29 May 1979. Resuspension rates were investigated by sampling resuspended tracer with air sampling equipment mounted as a function of height on a centrally located sampling tower at each site. Sampling equipment was operated as a function of wind speed increments in order to investigate resuspension rates, wind speed dependencies of resuspension rates, and for subsequent comparisons of resuspension rate changes as a function of time for constant wind speed ranges. Experimental results are reported for measurements over several years. Resuspension rates ranged from about 10/sup -13/ to 10/sup -6/ fraction of the tracer source resuspended per second. Resuspension rates tended to increase with increasing wind speed. At one investigation site, resuspension rates were nearly constant, except for seasonal variations, for a four-year time period. Resuspension rates appear higher in the autumn than in the spring and summer.

Sehmel, G.A.

1982-11-01T23:59:59.000Z

87

HYDROGEL TRACER BEADS: THE DEVELOPMENT, MODIFICATION, AND TESTING OF AN INNOVATIVE TRACER FOR BETTER UNDERSTANDING LNAPL TRANSPORT IN KARST AQUIFERS  

SciTech Connect (OSTI)

The goal of this specific research task is to develop proxy tracers that mimic contaminant movement to better understand and predict contaminant fate and transport in karst aquifers. Hydrogel tracer beads are transported as a separate phase than water and can used as a proxy tracer to mimic the transport of non-aqueous phase liquids (NAPL). They can be constructed with different densities, sizes & chemical attributes. This poster describes the creation and optimization of the beads and the field testing of buoyant beads, including sampling, tracer analysis, and quantitative analysis. The buoyant beads are transported ahead of the dissolved solutes, suggesting that light NAPL (LNAPL) transport in karst may occur faster than predicted from traditional tracing techniques. The hydrogel beads were successful in illustrating this enhanced transport.

Amanda Laskoskie, Harry M. Edenborn, and Dorothy J. Vesper

2012-01-01T23:59:59.000Z

88

11/23/11 10:55 AMQualtrics Survey Software Page 1 of 11https://dc-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank  

E-Print Network [OSTI]

ControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank Male Female African American/ Black American-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank WRE - MARCHhttps://dc-viawest.qualtrics.com/WRQualtricsControlPanel/PopUp.php

de Lijser, Peter

89

Effects of Post-Weld Heat Treatment on the Mechanical Properties of Similar- and Dissimilar-Alloy Friction Stir Welded Blanks  

SciTech Connect (OSTI)

Friction stir welding is a solid state joining process with relatively low welding temperatures. Nevertheless, the mechanical properties of friction stir welded blanks are degraded after welding. Indeed, both strength and ductility of the welds are decreased after welding. Often, the resulting friction stir welded blanks need to be formed to their final structural shape. Therefore, the formability of friction stir welded blanks is of primary importance in the manufacturing of structural parts. This paper studies how the mechanical properties and particularly formability of friction stir welded blanks can be improved by applying a post weld heat treatment. Two aluminum alloys from 2000 and 7000 series, namely 2024-T3 and 7075-T6, are selected for the study. The sheet thickness of both materials is 2,0 mm. The selected alloys are welded in three configurations: 2024-T3 and 2024-T3, 7075-T6 and 7075-T6, and 2024-T3 and 7075-T6. The resulting welds are naturally aged for a few months. Three sets of standard dog bone shape tensile test specimens are then machined from the welds. The first set of the specimens is tested without any heat treatment. The second set of the specimens is solution heat treated and quenched before testing. The third set of the specimens is solution heat treated, quenched, and naturally aged for a week before testing. The mechanical properties of the three different sets of specimens are compared with each other. It is shown that careful selection of post weld heat-treatment can greatly improve the formability of friction stir welded blanks.

Zadpoor, Amir Abbas [Materials Innovation Institute (M2i), Mekelweg 2, Delft 2628CD (Netherlands); Faculty of Aerospace Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2629HS (Netherlands); Sinke, Jos [Faculty of Aerospace Engineering, Delft University of Technology (TU Delft), Mekelweg 2, Delft 2629HS (Netherlands)

2011-01-17T23:59:59.000Z

90

New particle transport diagnostics with tracer-encapsulated solid pellet  

Science Journals Connector (OSTI)

A new diagnostic method for local particle transport, which is based on injection of the tracer-encapsulated solid pellet (TESPEL), was applied for the first time in experiments on the CHS device. Such a configuration of the pellet allows the lithium hydride tracer to reach the core plasma region and be deposited within a few centimetres in the radial direction, which was confirmed by measurements with photomultipliers and CCD imaging. The radial diffusion of the fully ionized tracer is observed by means of charge exchange recombination spectroscopy with the heating neutral beam as a source. The local tracer deposition and complete ionization of the tracer greatly simplify the transport analysis and allow the use of analytic expressions for deriving the diffusion coefficient, D. With this procedure, the diffusion coefficient was determined for various plasma conditions and was found to be larger for discharges with higher electron temperature. An impurity transport code was also applied to the experimental data, which allowed more precise calculation of the transport coefficients including the pinch velocity, V. It is expected that a higher accuracy will be achieved for the case of TESPEL injection into a larger-scale plasma.

K Khlopenkov; S Sudo

2001-01-01T23:59:59.000Z

91

Tracer Testing At Raft River Geothermal Area (1983) | Open Energy  

Open Energy Info (EERE)

3) 3) Exploration Activity Details Location Raft River Geothermal Area Exploration Technique Tracer Testing Activity Date 1983 Usefulness not indicated DOE-funding Unknown Exploration Basis To develop chemical tracing procedures for geothermal areas. Notes Two field experiments were conducted to develop chemical tracer procedures for use with injection-backflow testing, one on the fracture-permeability Raft River reservoir and the other on the matrix-permeability East Mesa reservoir. Results from tests conducted with incremental increases in the injection volume at both East Mesa and Raft River suggests that, for both reservoirs, permeability remained uniform with increasing distance from the well bore. Increased mixing during quiescent periods, between injection and

92

Preliminary assessment of halogenated alkanes as vapor-phase tracers  

SciTech Connect (OSTI)

New tracers are needed to evaluate the efficiency of injection strategies in vapor-dominated environments. One group of compounds that seems to meet the requirements for vapor-phase tracing are the halogenated alkanes (HCFCs). HCFCs are generally nontoxic, and extrapolation of tabulated thermodynamic data indicate that they will be thermally stable and nonreactive in a geothermal environment. The solubilities and stabilities of these compounds, which form several homologous series, vary according to the substituent ratios of fluorine, chlorine, and hydrogen. Laboratory and field tests that will further define the suitability of HCFCs as vapor-phase tracers are under way.

Adams, Michael C.; Moore, Joseph N.; Hirtz, Paul

1991-01-01T23:59:59.000Z

93

Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2-  

Open Energy Info (EERE)

Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2- Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2- and Water-Based Geothermal Reservoirs Geothermal Lab Call Project Jump to: navigation, search Last modified on July 22, 2011. Project Title Advancing Reactive Tracer Methods for Measuring Thermal Evolution in CO2- and Water-Based Geothermal Reservoirs Project Type / Topic 1 Laboratory Call for Submission of Applications for Research, Development and Analysis of Geothermal Technologies Project Type / Topic 2 Tracers and Tracer Interpretation Project Description The concepts and theory behind the use of heat-sensitive tracers to study the thermal evolution of geothermal reservoirs was developed in the late 1980's under the Hot Dry Rock Project. Those studies described-conceptually and mathematically-the application of reactive tracers to tracking thermal fronts and to reservoir sizing. Later mathematical treatments focused on application of a single reactive tracer test to recover the temperature profile of a single streamtube. Previous tracer work has mainly focused on identifying conservative tracers. In these studies, chemicals that degraded at reservoir temperatures were discarded. Benzoic acids and dicarboxylic acids, which were found by Adams to degrade, may be useful as reactive tracers. Organic esters and amide tracers that undergo hydrolysis have been investigated and their use as reactive tracers appears feasible over a temperature range of 100ºC to 275ºC. However their reaction rates are pH dependent and sorption reactions have not been evaluated. While reactive tracer parameters have been measured in the lab, reactive tracers have not been extensively tested in the field. Thus, while reactive tracers appear to be a promising means of monitoring the thermal evolution of a geothermal reservoir, the concept has yet to be tested at the scale necessary for successful implementation, and tools for analyzing results of such tracer tests under the non-ideal conditions of an actual geothermal system have yet to be developed.

94

ANALYSIS OF TRACER AND THERMAL TRANSIENTS DURING REINJECTION  

E-Print Network [OSTI]

and developed a new technique which combines the results from in- terwell tracer tests and thermal injection variables of the injection and backflow periods. Finally we suggested thermal injection-backflow tests for interpreting thermal injection-backflow tests. In fact, the MD model was first developed by Lauwerier to study

Stanford University

95

RADIOGENIC ISOTOPES: TRACERS OF PAST OCEAN CIRCULATION AND EROSIONAL INPUT  

E-Print Network [OSTI]

in the ocean has varied as a function of changes in paleocircu- lation, source provenances, style and intensity-established paleoceano- graphic tracers such as carbon isotopes. INDEX TERMS: 1040 Geochemistry: Isotopic composition Atlantic Deep Water (NADW) according to latest estimates based on results of the World Ocean Circulation

Jellinek, Mark

96

DIVISION S-3-NOTES HYDROLOGIC TRACER EFFECTS ON SOIL  

E-Print Network [OSTI]

and denitrification (the conversion of NOf to N gas)can be important to the fate of NOf and organic pollutants on microbial activity. These effects could be important whentracers areused instudies of the fate and transport of pollutants in the environment. In such studies, it is important to determine if tracer compounds affect

Gold, Art

97

Calibration of hydraulic and tracer tests in fractured media  

E-Print Network [OSTI]

Calibration of hydraulic and tracer tests in fractured media represented by a DFN Model L. D. Donado, X. Sanchez-Vila, E. Ruiz* & F. J. Elorza** * Enviros Spain S.L. ** UPM #12;Fractured Media Water flows through fractures (matrix basically impervious ­ though relevant to transport) Fractures at all

Politècnica de Catalunya, Universitat

98

Partitioning and Interfacial Tracers for Differentiating NAPL Entrapment Configuration:? Column-Scale Investigation  

Science Journals Connector (OSTI)

Partitioning and Interfacial Tracers for Differentiating NAPL Entrapment Configuration:? Column-Scale Investigation ... In field investigations, such as partitioning interwell tracer tests (PITTs), tracers are deployed before and after cleanup implementation to assess remedial performance (13, 26?28). ... The use of 222Rn, a naturally occurring radioactive isotope, was investigated as a partitioning tracer to detect and quantify the amt. of non-aq.-phase ...

Dongping Dai; Frank T. Barranco Jr.; Tissa H. Illangasekare

2001-11-17T23:59:59.000Z

99

Page intentionally blank. ACKNOWLEDGMENTS  

E-Print Network [OSTI]

partners: Bonneville Power Administration, Bureau of Reclamation (which also serves as representative Authority, U.S. Army Corps of Engineers, U.S. Coast Guard, Western Power Administration, and State dam sector comprise the SCC: Allegheny Energy, Ameren Services Company, American Electric Power, Association

Kemner, Ken

100

Blank Starting Slide  

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

Rewind Generator Rewind Denison Powerhouse Denison Rewind Rewind Contract - Awarded to Alstom May 2004 - 4.56 million - 526 calendar days Denison Rewind Original Schedule - Start...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain Site Characterization Study; Progress report, June 1--December 31, 1990  

SciTech Connect (OSTI)

Ground water tracers are solutes dissolved in or carried by ground water to delineate flow pathways. Tracers provide information on direction and speed of water movement and that of contaminants that might be conveyed by the water. Tracers can also be used to measure effective porosity, hydraulic conductivity, dispersivity and solute distribution coefficients. For most applications tracers should be conservative, that is, move at the same rate as the water and not sorb to aquifer materials. Tracers must have a number of properties to be functional. Regardless of the desired properties, the chemical and physical behavior of a tracer in ground water and the porous medium under study must be understood. Good estimates of tracer behavior can be obtained from laboratory studies. Studies in this proposal will address tracer properties with analytical method development, static sorption and degradation studies and column transport studies, Mutagenicity tests will be performed on promising candidates. The tracers that will be used for these experiments are fluorinated organic acids and other organic compounds that have the chemical and biological stability necessary to be effective in the Yucca Mountain environment. Special emphasis will be placed on compounds that fluoresce or have very large ultraviolet absorption coefficients for very high analytical sensitivity.

Stetzenbach, K.J.

1990-12-31T23:59:59.000Z

102

An investigation of radial tracer flow in naturally fractured reservoirs  

SciTech Connect (OSTI)

This study presents a general solution for the radial flow of tracers in naturally fractured reservoirs. Continuous and finite step injection of chemical and radioactive tracers are considered. The reservoir is treated as being composed of two regions: a mobile region where longitudinal dispersion and convection take place and a stagnant region where only diffusion and adsorption are allowed. Radioactive decay is considered in both regions. The model of this study is thoroughly compared to those previously presented in literature by Moench and Ogata, Tang et al., Chen et al., and Hsieh et al. The solution is numerically inverted by means of the Crump algorithm. A detailed validation of the model with respect to solutions previously presented and/or simplified physical conditions solutions (i.e., homogeneous case) or limit solutions (i.e., for short times) was carried out. The influence of various dimensionless parameters that enter into the solution was investigated. A discussion of results obtained through the Crump and Stehfest algorithm is presented, concluding that the Crump method provides more reliable tracer concentrations.

Jetzabeth, Ramirez-Sabag; Fernando, Samaniego V.; Jesus, Rivera R.; Fernando Rodriguez

1991-01-01T23:59:59.000Z

103

Conductivity tracer studies for a fluidized-bed bioreactor  

SciTech Connect (OSTI)

An automated conductivity tracer test was developed to measure the residence time distribution (RTD) of a cometabolic fluidized-bed bioreactor (FBBR). The FBBR contained sand-core bioparticles grown with phenol and it provided high (70% to 80%) removal of trichloroethene (TCE) at short (3 minute) detention times. The tracer test apparatus was constructed with off-the-shelf components controlled with a PC-based data acquisition system. Non-disruptive hydrodynamic testing was obtained during normal operation of the FBBR. The conductivity of injected brine pulses was monitored at the reactor inlet and outlet. Dispersion numbers and detention times were computed by fitting the advection-dispersion model to the tracer curves. Typical dispersion numbers attributed to the fluidized-bed of bioparticles ranged from 0.07 to 0.11. In simplified modeling of the FBBR, dispersion was found to have little effect on TCE removal. Based on the dispersion of brine pulses, it was determined that phenol feed pulses injected at inhibitory concentrations over 2 g/L would be rapidly dispersed in the biological bed to non-inhibitory concentrations.

Leung, S.Y.; Segar, R.L. Jr. [Univ. of Missouri, Columbia, MO (United States). Dept. of Civil Engineering

1997-12-31T23:59:59.000Z

104

Tracer-encapsulated cryogenic pellet production for particle transport diagnostics  

Science Journals Connector (OSTI)

A device for producing a tracer-encapsulated cryogenic pellet is constructed for an accurate transport diagnostic system to measure particle transport both parallel and perpendicular to the magnetic-field lines in magnetic confinementdevices. As for the typical configuration of the tracer-encapsulated pellet it is proposed that a 50–250 ?m diam tracer made of a light atom such as lithium carbon etc. is encapsulated in the center of a 1–3 mm diam cylindrical pellet of hydrogen. For demonstration of the device operation a 240 ?m diam carbon sphere is encapsulated in the center of a 3 mm diam cylindrical pellet of hydrogen and accelerated by a light gas gun to velocities of 400–800 m/s in a test chamber. The pellet has been photographed simultaneously from two directions and the two two-dimensional images are reconstructed to a three-dimensional image. Thus the proof of principle of the device operation has been demonstrated.

S. Sudo; H. Itoh; K. Khlopenkov

1997-01-01T23:59:59.000Z

105

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. ???, XXXX, DOI:10.1029/, What is the skill of ocean tracers in reducing uncertainties  

E-Print Network [OSTI]

in current Earth system models and (ii) imperfect knowledge of model parameters. Ocean tracers observa- tions

Haran, Murali

106

Microsoft PowerPoint - Tracer plume detection-LANL(Fessenden).ppt  

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

Tracer Testing of Plume Movement Tracer Testing of Plume Movement Julianna Fessenden and Paul Reimus, Los Alamos National Laboratory Plume modeling (atmosphere, reservoir, groundwater) Purpose of Tracing Plumes Monitor species of interest within reservoir Monitor species of interest outside reservoir Monitor Flow paths Capture zones Monitor Breaches Extent of movement Desirable Tracer Characteristics (1) Inexpensive (measurement, analytical) (2) Low detection limits, no analytical interferences (3) Quick, easy to sample and measure (4) Non toxic, readily permitted (5) Both sorbing/non-sorbing tracer use Perflorocarbon Tracer deployment NETL facilities Classes of Tracers (1) Gas Phase (2) Liquid Phase (3) Organic, inorganic, aqueous (4) Conservative/nonreacting (5) Reactive with mineral surfaces or soluble in non-carrier phase

107

Tracer Recovery and Mixing from Two Geothermal Injection-Backflow Studies |  

Open Energy Info (EERE)

Tracer Recovery and Mixing from Two Geothermal Injection-Backflow Studies Tracer Recovery and Mixing from Two Geothermal Injection-Backflow Studies Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Tracer Recovery and Mixing from Two Geothermal Injection-Backflow Studies Details Activities (2) Areas (2) Regions (0) Abstract: Injection-backflow tracer testing on a single well is not a commonly used procedure for geothermal reservoir evaluation, and, consequently, there is little published information on the character or interpretation of tracer recovery curves. Two field experiments were conducted to develop chemical tracer procedures for use with injection-backflow testing, one on the fracture-permeability Raft River reservoir and the other on the matrix-permeability East Mesa reservoir. Results from tests conducted with incremental increases in the injection

108

Characterization of four potential laser-induced fluorescence tracers for diesel engine applications  

Science Journals Connector (OSTI)

Four potential laser-induced fluorescence (LIF) tracers, 1-phenyloctane, 1-phenyldecane, 1-methylnaphthalene, and 2-methylnaphthalene, are characterized for diesel engine applications....

Trost, Johannes; Zigan, Lars; Leipertz, Alfred; Sahoo, Dipankar; Miles, Paul C

2013-01-01T23:59:59.000Z

109

Novel Multi-dimensional Tracers for Geothermal Inter-wall Diagnostics  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. The objective of this project is to develop a matrix of the smart geothermal tracer and its interpretation tools.

110

Using Seismic Reflection to Locate a Tracer Testing Complex South of Yucca Mountain, Nye County, Nevada.  

E-Print Network [OSTI]

??Tracer testing in the fractured volcanic aquifer near Yucca Mountain, and in the alluvial aquifer south of Yucca Mountain, Nevada has been conducted in the… (more)

Kryder, Levi

2014-01-01T23:59:59.000Z

111

Determination of Water Saturation in Relatively Dry Porous Media Using Gas-phase Tracer Tests  

SciTech Connect (OSTI)

Soil desiccation (drying), involving water evaporation induced by dry air injection and extraction, is a potentially robust remediation process to slow migration of inorganic or radionuclide contaminants through the vadose zone. The application of gas-phase partitioning tracer tests has been proposed as a means to estimate initial water volumes and to monitor the progress of the desiccation process at pilot-test and field sites. In this paper, tracer tests have been conducted in porous medium columns with various water saturations using sulfur hexafluoride as the conservative tracer and tricholorofluoromethane and difluoromethane as the water-partitioning tracers. For porous media with minimal silt and/or organic matter fractions, tracer tests provided reasonable saturation estimates for saturations close to zero. However, for sediments with significant silt and/or organic matter fractions, tracer tests only provided satisfactory results when the water saturation was at least 0.1 - 0.2. For dryer conditions, the apparent tracer retardation increases due to air – soil sorption, which is not included in traditional retardation coefficients derived from advection-dispersion equations accounting only for air – water partitioning and water – soil sorption. Based on these results, gas-phase partitioning tracer tests may be used to determine initial water volumes in sediments, provided the initial water saturations are sufficiently large. However, tracer tests are not suitable for quantifying moisture content in desiccated sediments.

Oostrom, Martinus; Tartakovsky, Guzel D.; Wietsma, Thomas W.; Truex, Michael J.; Dane, Jacob H.

2011-04-15T23:59:59.000Z

112

Calcium translocation and whole plant transpiration: spatial and temporal measurements using radio-Strontium as tracer  

E-Print Network [OSTI]

comparison with zinc, strontium and rubidium. Annals of783- Wasserman RH. 1998. Strontium as a tracer for calciumor inapplicable. As Strontium (Sr) was found to behave in

Seligmann, Ron; Wengrowicz, Udi; Tirosh, Danny; Yermiyahu, Uri; Bar-Tal, Asher; Schwartz, Amnon

2009-01-01T23:59:59.000Z

113

E-Print Network 3.0 - atmospheric tracer experiments Sample Search...  

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

of Summary: for incorporating Lagrangian tracer positions into a model of flows (such as ocean currents). Such models... are important in understanding the behaviour of...

114

Tracer Testing At Neal Hot Springs Geothermal Area (U.S. Geothermal...  

Open Energy Info (EERE)

to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Tracer Testing At Neal Hot Springs Geothermal Area (U.S. Geothermal Inc., 2012) Exploration Activity...

115

E-Print Network 3.0 - activity optimal tracers Sample Search...  

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

AND AMOC Abstract Current projections of the oceanic response... in current Earth system models and (ii) imperfect knowledge of model parameters. Ocean tracers observa- tions...

116

Estimation of tracer diffusion coefficients of ions in aqueous solution  

SciTech Connect (OSTI)

Equations are given for estimating tracer diffusion coefficients D/sub i//sup 0/ of ions at infinite dilution in terms of limiting ionic conductances ..lambda../sub i//sup 0/. Also given are generalized Nernst-Hartley equations for binary and multicomponent diffusion coefficients D/sup 0/ and D/sub ij//sup 0/, respectively, at infinite dilution. Data, estimates, and correlations for ..lambda../sub i//sup 0/ at 25/sup 0/C and other temperatures are discussed. Estimated values of ..lambda../sub i//sup 0/ are tabulated from 0-300/sup 0/C for ions of waste isolation interest and for ions of economic interest in geothermal brines. Estimates of their tracer diffusion coefficients at infinite dilution are tabulated. A rule of thumb, good to a factor of 2, is presented. Very limited data (available only at 25/sup 0/C) indicate that D/sub i//D/sub i//sup 0/ generally declines as the concentration of salt or supporting electrolyte increases. 6 figures, 2 tables.

Miller, D.G.

1982-09-07T23:59:59.000Z

117

Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain Site Characterization Study; Progress report, January 1, 1991--June 30, 1991  

SciTech Connect (OSTI)

Studies continue on the use of organic acids as tracers in hydrology studies of Yucca Mountain. Work performed during this time period has been concentrated in three main areas: the familiarization with, and optimization of, the LC-MS hardware and data system; the initial development of soil column test procedures, which are used for evaluation of both the columns themselves and the tracer compounds; and continuation of the batch sorption and degradation studies for the potential tracers. All three of these tasks will continue, as the addition of new tracer compounds, analytical information, and equipment will necessitate further evaluation of existing methods and procedures. Also included in this report is the final report on an information system.

Stetzenbach, K.J.

1991-12-31T23:59:59.000Z

118

SAND TRACER MOVEMENT MEASURED IN A STRONG RIP CURRENT Nicholas C. Kraus  

E-Print Network [OSTI]

exceeding 50 cm/sec in areas where instruments could be placed. Three colors of sand tracer were injected the diver's signal, a float tied to the diver's wrist was released and allowed to flow with the current because of the cold water, placed instruments, injected the tracer, and sampled the bottom with ropes tied

US Army Corps of Engineers

119

IAEA-CN-80/66 ISOTOPE TRACERS IN GLOBAL WATER AND CLIMATE STUDIES  

E-Print Network [OSTI]

comprehensive source of data for evaluating the modern global isotope field generated by atmospheric generalIAEA-CN-80/66 ISOTOPE TRACERS IN GLOBAL WATER AND CLIMATE STUDIES OF THE PAST AND PRESENT T Agency, Wagramer Strasse 5, P.O. Box 100, A-1400 Vienna, AUSTRIA Abstract ISOTOPE TRACERS IN GLOBAL WATER

Edwards, Thomas W.D.

120

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period  

E-Print Network [OSTI]

Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period R (2006), Globally synchronous ice core volcanic tracers and abrupt cooling during the last glacial period histories from ice coring of Greenland and Antarctica over the period 2 to 45 ka, using SO4 anomalies

Price, P. Buford

Note: This page contains sample records for the topic "tracer prep blanks" 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

First Tracer Test After Circulation in Desert Peak 27-15  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

Peter Rose

122

Stochastic inversion of tracer test and electrical geophysical data to estimate hydraulic conductivities  

E-Print Network [OSTI]

MonteCarlo (McMC) methodology to jointly invert the dynamic resistivity data, together with borehole tracer heterogeneity with respect to wellbore separation, where flow and transport are largely controlled by highly of drill cores and/or the results of tracer and pumping experiments; however, these techniques are often

Singha, Kamini

123

Tracer Methods for Characterizing Fracture Stimulation in Engineered Geothermal Systems (EGS)  

Broader source: Energy.gov [DOE]

Project objectives: identify tracers with sorption properties favorable for EGS applications; apply reversibly sorbing tracers to determine the fracture-matrix interface area available for heat transfer; and; explore the feasibility of obtaining fracture-matrix interface area from non-isothermal; single-well injection-withdrawal (SWIW) tests.

124

Heat as a tracer to determine streambed water exchanges Jim Constantz1  

E-Print Network [OSTI]

Heat as a tracer to determine streambed water exchanges Jim Constantz1 Received 13 March 2008 of heat as a tracer of shallow groundwater movement and describes current temperature-based approaches relying on traditional observation wells, and remote sensing and other large-scale advanced temperature

125

First Tracer Test After Circulation in Desert Peak 27-15  

SciTech Connect (OSTI)

Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

Rose, Peter

2013-11-16T23:59:59.000Z

126

Saline tracer visualized with three-dimensional electrical resistivity tomography: Field-scale spatial moment analysis  

E-Print Network [OSTI]

Saline tracer visualized with three-dimensional electrical resistivity tomography: Field; accepted 14 February 2005; published 24 May 2005. [1] Cross-well electrical resistivity tomography (ERT., and S. M. Gorelick (2005), Saline tracer visualized with three-dimensional electrical resistivity

Singha, Kamini

127

Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene Sulfonate and  

Open Energy Info (EERE)

Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene Sulfonate and Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene Sulfonate and 2,7-Naphthalene Disulfonate Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Tracer Testing at Dixie Valley, Nevada, Using 2-Naphthalene Sulfonate and 2,7-Naphthalene Disulfonate Abstract The decay kinetics of the candidate tracers 2-naphthalene sulfonate and 2,7-naphthalenedisulfonate was studied under laboratory conditionsthat simulate a hydrothermal environment, withneither compound exhibiting any decay after oneweek at 330�C. These data indicate that thesecompounds are more thermally stable than any of thepreviously studied polyaromatic sulfonates. Both ofthe tracer candidates were successfully tested in afield study at the Dixie Valley, Nevada, geothermalreservoir. In addition to

128

US prep plant census 2008  

SciTech Connect (OSTI)

Each year Coal Age conducts a fairly comprehensive survey of the industry to produce the US coal preparation plant survey. This year's survey shows how many mergers and acquisitions have given coal operators more coal washing capacity. The plants are tabulated by state, giving basic details including company owner, plant name, raw feed, product ash %, quality, type of plant builder and year built. 1 tab., 1 photo.

Fiscor, S.

2008-10-15T23:59:59.000Z

129

Tracer Testing At Coso Geothermal Area (2004) | Open Energy Information  

Open Energy Info (EERE)

Coso Geothermal Area (2004) Coso Geothermal Area (2004) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Tracer Testing Activity Date 2004 Usefulness not indicated DOE-funding Unknown Exploration Basis To determine the EGS potential of the Coso Geothermal Field Notes A dramatic decrease in the ratio of chloride to boron was observed in the liquid discharge of a well proposed for EGS development. The decrease appears to be related to the transformation of some feed zones in the well from liquid-dominated to vapor-dominated. High concentrations of boron are transported to the wellbore in the steam, where it fractionates to the liquid phase flowing in from liquid-dominated feed zones. The high-boron steam is created when the reservoir liquid in some of the feed zones boils

130

Predictions of PuO{sub 2} and tracer compound release from ISV melts  

SciTech Connect (OSTI)

Two field tests were conducted at the Idaho National Engineering Laboratory (INEL) to assess in situ vitrification (ISV) suitability for long-term stabilization of buried radioactive waste. Both tests contained rare-earth oxide tracers (DY{sub 2}O{sub 3}, Yb{sub 2}O{sub 3}, and Tb{sub 4}O{sub 7}) to simulate the presence of plutonium in the form of PuO{sub 2}. In the first test, Intermediate Field Test (IFT)-l, approximately 4-% release of tracer material occurred during soil melting and associated off-gassing, while essentially nil release was observed for the second experiment (IFT-2) for which off-gassing was much reduced. This report presents an evaluation of the IFT test data in terms of governing release processes. Prediction of tracer release during ISV melting centered on an assessment of three potential transport mechanisms, (a) tracer diffusion through stagnant pool, (b) tracer transport by convective currents, and (c) tracer carry-off by escaping gas bubbles. Analysis indicates that tracer release by escaping gas is the dominant release mechanism, which is consistent with video records of gas bubble escape from the ISV melt surface. Quantitative mass transport predictions were also made for the IFT-I test conditions, indicating similarity between the 4-% release data and calculational results at viscosities of {approx} poise and tracer diffusivities of {approx}10{sub {minus}6} CM{sup 2}/s. Since PuO{sub 2} has similar chemical and transport (diffusivity) properties as the rare-earth tracers used in the rare earth tracers used in the IFT experiments, release of PuO{sub 2} is predicted for similar off-gassing conditions. Reduced off-gassing during ISV would thus be expected to improve the overall retention of heavy-oxides within vitrified soil.

Cronenberg, A.W. [Engineering Science and Analysis, Albuquerque, NM (United States); Callow, R.A. [EG and G Idaho, Inc., Idaho Falls, ID (United States)

1992-04-01T23:59:59.000Z

131

Predictions of PuO sub 2 and tracer compound release from ISV melts  

SciTech Connect (OSTI)

Two field tests were conducted at the Idaho National Engineering Laboratory (INEL) to assess in situ vitrification (ISV) suitability for long-term stabilization of buried radioactive waste. Both tests contained rare-earth oxide tracers (DY{sub 2}O{sub 3}, Yb{sub 2}O{sub 3}, and Tb{sub 4}O{sub 7}) to simulate the presence of plutonium in the form of PuO{sub 2}. In the first test, Intermediate Field Test (IFT)-l, approximately 4-% release of tracer material occurred during soil melting and associated off-gassing, while essentially nil release was observed for the second experiment (IFT-2) for which off-gassing was much reduced. This report presents an evaluation of the IFT test data in terms of governing release processes. Prediction of tracer release during ISV melting centered on an assessment of three potential transport mechanisms, (a) tracer diffusion through stagnant pool, (b) tracer transport by convective currents, and (c) tracer carry-off by escaping gas bubbles. Analysis indicates that tracer release by escaping gas is the dominant release mechanism, which is consistent with video records of gas bubble escape from the ISV melt surface. Quantitative mass transport predictions were also made for the IFT-I test conditions, indicating similarity between the 4-% release data and calculational results at viscosities of {approx} poise and tracer diffusivities of {approx}10{sub {minus}6} CM{sup 2}/s. Since PuO{sub 2} has similar chemical and transport (diffusivity) properties as the rare-earth tracers used in the rare earth tracers used in the IFT experiments, release of PuO{sub 2} is predicted for similar off-gassing conditions. Reduced off-gassing during ISV would thus be expected to improve the overall retention of heavy-oxides within vitrified soil.

Cronenberg, A.W. (Engineering Science and Analysis, Albuquerque, NM (United States)); Callow, R.A. (EG and G Idaho, Inc., Idaho Falls, ID (United States))

1992-04-01T23:59:59.000Z

132

Mon. Not. R. Astron. Soc. 427, 679687 (2012) doi:10.1111/j.1365-2966.2012.21883.x Deep blank-field catalogue for medium-and large-sized telescopes  

E-Print Network [OSTI]

Mon. Not. R. Astron. Soc. 427, 679­687 (2012) doi:10.1111/j.1365-2966.2012.21883.x Deep blankInstituto de Astrof´isica de Canarias, E-38205 La Laguna, Tenerife, Spain 5GTC Project, E-38205 La Laguna that are devoid of stars down to a given threshold magnitude, constitutes one of the most relevant calibration

133

Effect of room air recirculation delay on the decay rate of tracer gas  

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

Effect of room air recirculation delay on the decay rate of tracer gas Effect of room air recirculation delay on the decay rate of tracer gas concentration Title Effect of room air recirculation delay on the decay rate of tracer gas concentration Publication Type Journal Article Year of Publication 2007 Authors Lorenzetti, David M., Astrid H. Kristoffersen, and Ashok J. Gadgil Journal Indoor Air Pagination 7 Keywords recirculating ventilation, tracer decay rate Abstract Tracer gas measurements are used to estimate the flow rate of fresh air into a room or building. These methods commonly account for the decay of tracer gas concentration as the result of ventilation air supply and infiltration, using a well-mixed model of the space. Some researchers also have considered the effect of leakage in the ventilation ductwork. This paper considers the effect of recirculation through ventilation ducts on the calculated fresh air supply rate. Transport delay in the ducts can significantly alter the time evolution of tracer concentration, and hence alter the estimated air change rate.

134

Effect of room air recirculation delay on the decay rate of tracer gas  

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

Effect of room air recirculation delay on the decay rate of tracer gas Effect of room air recirculation delay on the decay rate of tracer gas Title Effect of room air recirculation delay on the decay rate of tracer gas Publication Type Conference Proceedings Year of Publication 2004 Authors Kristoffersen, Astrid H., Ashok J. Gadgil, and David M. Lorenzetti Conference Name 9th International Conference on Air Distribution in Rooms - RoomVent 2004, Pagination pp 6 Date Published September 5-8, 2 Conference Location Coimbra, Portugal Abstract Tracer gas measurements are commonly used to estimate the fresh air exchange rate in a room or building. Published tracer decay methods account for fresh air supply, infiltration, and leaks in ductwork. However, the time delay associated with a ventilation system recirculating tracer back to the room also affects the decay rate. We present an analytical study of tracer gas decay in a well-mixed, mechanically-ventilated room with recirculation. The analysis shows that failing to account for delays can lead to under- or over-estimates of the fresh air supply, depending on whether the decay rate calculation includes the duct volume

135

Predictions of tracer transport in interwell tracer tests at the C-Hole complex. Yucca Mountain site characterization project report milestone 4077  

SciTech Connect (OSTI)

This report presents predictions of tracer transport in interwell tracer tests that are to be conducted at the C-Hole complex at the Nevada Test Site on behalf of the Yucca Mountain Site Characterization Project. The predictions are used to make specific recommendations about the manner in which the tracer test should be conducted to best satisfy the needs of the Project. The objective of he tracer tests is to study flow and species transport under saturated conditions in the fractured tuffs near Yucca Mountain, Nevada, the site of a potential high-level nuclear waste repository. The potential repository will be located in the unsaturated zone within Yucca Mountain. The saturated zone beneath and around the mountain represents the final barrier to transport to the accessible environment that radionuclides will encounter if they breach the engineered barriers within the repository and the barriers to flow and transport provided by the unsaturated zone. Background information on the C-Holes is provided in Section 1.1, and the planned tracer testing program is discussed in Section 1.2.

Reimus, P.W.

1996-09-01T23:59:59.000Z

136

Tracers for monitoring the activity of sodium/glucose cotransporters in health and disease  

DOE Patents [OSTI]

Radiolabeled tracers for sodium/glucose cotransporters (SGLTs), their synthesis, and their use are provided. The tracers are methyl or ethyl pyranosides having an equatorial hydroxyl group at carbon-2 and a C 1 preferred conformation, radiolabeled with .sup.18F, .sup.123I, or .sup.124I, or free hexoses radiolabeled with .sup.18F, .sup.123I, or .sup.124. Also provided are in vivo and in vitro techniques for using these and other tracers as analytical and diagnostic tools to study glucose transport, in health and disease, and to evaluate therapeutic interventions.

Wright, Ernest M; Barrio, Jorge R; Hirayama, Bruce A; Kepe, Vladimir

2014-09-30T23:59:59.000Z

137

Project definition study for the National Biomedical Tracer Facility  

SciTech Connect (OSTI)

The University of Alabama at Birmingham (UAB) has conducted a study of the proposed National Biomedical Tracer Facility (NBTF). In collaboration with General Atomics, RUST International, Coleman Research Corporation (CRC), IsoMed, Ernst and Young and the advisory committees, they have examined the issues relevant to the NBTF in terms of facility design, operating philosophy, and a business plan. They have utilized resources within UAB, CRC and Chem-Nuclear to develop recommendations on environmental, safety and health issues. The Institute of Medicine Panel`s Report on Isotopes for Medicine and the Life Sciences took the results of prior workshops further in developing recommendations for the mission of the NBTF. The IOM panel recommends that the NBTF accelerator have the capacity to accelerate protons to 80 MeV and a minimum of 750 microamperes of current. The panel declined to recommend a cyclotron or a linac. They emphasized a clear focus on research and development for isotope production including target design, separation chemistry and generator development. The facility needs to emphasize education and training in its mission. The facility must focus on radionuclide production for the research and clinical communities. The formation of a public-private partnership resembling the TRIUMF-Nordion model was encouraged. An advisory panel should assist with the NBTF operations and prioritization.

Roozen, K.

1995-02-15T23:59:59.000Z

138

Tracer diffusion in compacted, water-saturated bentonite  

SciTech Connect (OSTI)

Compacted Na-bentonite clay barriers, widely used in theisolation of solid-waste landfills and other contaminated sites, havebeen proposed for a similar use in the disposal of high-level radioactivewaste. Molecular diffusion through the pore space in these barriers playsa key role in their performance, thus motivating recent measurements ofthe apparent diffusion coefficient tensor of water tracers in compacted,water-saturated Na-bentonites. In the present study, we introduce aconceptual model in which the pore space of water-saturated bentonite isdivided into 'macropore' and 'interlayer nanopore' compartments. Withthis model we determine quantitatively the relative contributions ofpore-network geometry (expressed as a geometric factor) and of thediffusive behavior of water molecules near montmorillonite basal surfaces(expressed as a contristivity factor) to the apparent diffusioncoefficient tensor. Our model predicts, in agreement with experiment,that the mean principal value of the apparent diffusion coefficienttensor follows a single relationship when plotted against the partialmontmorillonite dry density (mass of montmorillonite per combined volumeof montmorillonite and pore space). Using a single fitted parameter, themean principal geometric factor, our model successfully describes thisrelationship for a broad range of bentonite-water system, from dilute gelto highly-compacted bentonite with 80 percent of its pore water ininterlayer nanopores.

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

2005-08-04T23:59:59.000Z

139

Simulation of single well tracer tests for surfactant–polymer flooding  

Science Journals Connector (OSTI)

A single well tracer test (SWTT) is a method to investigate the residual oil saturation near the wellbore. It presents an important tool to evaluate enhanced oil recovery (EOR) processes. For EOR evaluation, ...

Peter X. Bu; Abdulkareem M. AlSofi; Jim Liu…

2014-10-01T23:59:59.000Z

140

Wintertime Dispersion in a Mountainous Basin at Roanoke, Virginia: Tracer Study  

Science Journals Connector (OSTI)

During January 1989, five nighttime SF6 tracer experiments were conducted in Roanoke, Virginia. The experiments were designed to help identify and understand the dispersion characteristics of a basin atmosphere during winter stagnation ...

K. Jerry Allwine; Brian K. Lamb; Robert Eskridge

1992-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Glass mixing theory and tracer study results from the SF-10 run  

SciTech Connect (OSTI)

A general, partial differential equation governing glass mixing in the Slurry Fed Ceramic Melter (SFCM) was derived and a solution obtained based upon certain simplifying assumptions. Tracer studies were then conducted in the SFCM during the SF-10 run to test the theory and characterize glass mixing in this melter. Analysis of the tracer data shows that glass mixing in the SFCM can be explained by use of a model of two, well-mixed tanks in series.

Bowman, B.W.; Routt, K.R.

1988-08-01T23:59:59.000Z

142

Utility of Bromide and Heat Tracers for Aquifer Characterization Affected by Highly Transient Flow Conditions  

SciTech Connect (OSTI)

A tracer test using both bromide and heat tracers conducted at the Integrated Field Research Challenge site in Hanford 300 Area (300A), Washington, provided an instrument for evaluating the utility of bromide and heat tracers for aquifer characterization. The bromide tracer data were critical to improving the calibration of the flow model complicated by the highly dynamic nature of the flow field. However, most bromide concentrations were obtained from fully screened observation wells, lacking depth-specific resolution for vertical characterization. On the other hand, depth-specific temperature data were relatively simple and inexpensive to acquire. However, temperature-driven fluid density effects influenced heat plume movement. Moreover, the temperature data contained “noise” caused by heating during fluid injection and sampling events. Using the hydraulic conductivity distribution obtained from the calibration of the bromide transport model, the temperature depth profiles and arrival times of temperature peaks simulated by the heat transport model were in reasonable agreement with observations. This suggested that heat can be used as a cost-effective proxy for solute tracers for calibration of the hydraulic conductivity distribution, especially in the vertical direction. However, a heat tracer test must be carefully designed and executed to minimize fluid density effects and sources of noise in temperature data. A sensitivity analysis also revealed that heat transport was most sensitive to hydraulic conductivity and porosity, less sensitive to thermal distribution factor, and least sensitive to thermal dispersion and heat conduction. This indicated that the hydraulic conductivity remains the primary calibration parameter for heat transport.

Ma, Rui; Zheng, Chunmiao; Zachara, John M.; Tonkin, Matthew J.

2012-08-29T23:59:59.000Z

143

Laboratory testing and modeling to evaluate perfluorocarbon compounds as tracers in geothermal systems  

SciTech Connect (OSTI)

The thermal stability and adsorption characteristics of three perfluorinated hydrocarbon compounds were evaluated under geothermal conditions to determine the potential to use these compounds as conservative or thermally-degrading tracers in Engineered (or Enhanced) Geothermal Systems (EGS). The three compounds tested were perfluorodimethyl-cyclobutane (PDCB), perfluoromethylcyclohexane (PMCH), and perfluorotrimethylcyclohexane (PTCH), which are collectively referred to as perfluorinated tracers, or PFTs. Two sets of duplicate tests were conducted in batch mode in gold-bag reactors, with one pair of reactors charged with a synthetic geothermal brine containing the PFTs and a second pair was charged with the brine-PFT mixture plus a mineral assemblage chosen to be representative of activated fractures in an EGS reservoir. A fifth reactor was charged with deionized water containing the three PFTs. The experiments were conducted at {approx}100 bar, with temperatures ranging from 230 C to 300 C. Semi-analytical and numerical modeling was also conducted to show how the PFTs could be used in conjunction with other tracers to interrogate surface area to volume ratios and temperature profiles in EGS reservoirs. Both single-well and cross-hole tracer tests are simulated to illustrate how different suites of tracers could be used to accomplish these objectives. The single-well tests are especially attractive for EGS applications because they allow the effectiveness of a stimulation to be evaluated without drilling a second well.

Reimus, Paul W [Los Alamos National Laboratory

2011-01-21T23:59:59.000Z

144

Production and acceleration of tracer encapsulated solid pellets for particle transport diagnostics  

Science Journals Connector (OSTI)

A new method for producing a tracer-encapsulated solid pellet (TESPEL) has been developed for a local deposition of the tracer ions in the core plasma and an accurate measurement of the particle transport. The method allows manufacturing of TESPELs in the form of polystyrene shells containing lithium hydride inside as a tracer. The TESPEL acceleration has been successfully performed and photos of the pellets in flight confirmed the TESPEL integrity. For the pellets with diameter 300–400 ? m and wall thickness 40–50 ? m the pellet fragility becomes insignificant. Calculation of the TESPEL ablation rate has showed that the achieved pellet velocities and sizes are appropriate for the injection into a medium size plasma. It was proposed to fractionate the tracer contents in order to provide better localization of the deposited tracer ions in the plasma. The data obtained in these experiments have proved that injection of the TESPEL made from the plastic shells can be a promising tool for the particle transport diagnostics.

K. V. Khlopenkov; S. Sudo

1998-01-01T23:59:59.000Z

145

Advancing reactive tracer methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. This project aims to develop reactive tracer method for monitoring thermal drawdown in enhanced geothermal systems.

146

iBlank Portrait Template  

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

Suite 600, 1901 North Moore Street Suite 600, 1901 North Moore Street Arlington, VA 22209-1728 Phone: (703) 522-0086 | Fax: (703) 522-0548 Email: hpbamail@hpba.org Web Site: www.hpba.org HPBA Comments NOPR on Energy Conservation Standards for Direct Heating Equipment Docket No. EERE-2011-BT-STD-0047 RIN 1904-AC56 October 14, 2011 The Hearth, Patio & Barbecue Association (HPBA) provides these comments in response to the Department of Energy (DOE) Notice of Proposed Rulemaking entitled "Energy Conservation Program: Energy Conservation Standards for Direct Heating Equipment," published at 76 Fed. Reg. 43941 (July 22, 2011) (the NOPR). HPBA is the North American industry association for 2500 member manufacturers, retailers, and distributors of hearth products. The vast majority of these entities are small businesses

147

Blank copy of Exam 2  

E-Print Network [OSTI]

The sports car costs $21,500 and has estimated operating costs of $1,800 per year. The. SUV costs $19,800, but operating costs are estimated to be $2,300 per

Math Dept

2006-04-17T23:59:59.000Z

148

USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE  

Open Energy Info (EERE)

NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE COSO EGS PROJECT Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: USE OF NATURALLY-OCCURRING TRACERS TO MONITOR TWO-PHASE CONDITIONS IN THE COSO EGS PROJECT Details Activities (1) Areas (1) Regions (0) Abstract: A dramatic decrease in the ratio of chloride to boron was observed in the liquid discharge of a well proposed for EGS development in the Coso geothermal field. The decrease appears to be related to the transformation of some feed zones in the well from liquid-dominated to vapor-dominated. High concentrations of boron are transported to the wellbore in the steam, where it fractionates to the liquid phase flowing in from liquid-dominated feed zones. The high-boron steam is created when the

149

Enthalpy and mass flowrate measurements for two-phase geothermal production by Tracer dilution techniques  

SciTech Connect (OSTI)

A new technique has been developed for the measurement of steam mass flowrate, water mass flowrate and total enthalpy of two-phase fluids produced from geothermal wells. The method involves precisely metered injection of liquid and vapor phase tracers into the two-phase production pipeline and concurrent sampling of each phase downstream of the injection point. Subsequent chemical analysis of the steam and water samples for tracer content enables the calculation of mass flowrate for each phase given the known mass injection rates of tracer. This technique has now been used extensively at the Coso geothermal project, owned and operated by California Energy Company. Initial validation of the method was performed at the Roosevelt Hot Springs geothermal project on wells producing to individual production separators equipped with orificeplate flowmeters for each phase.

Hirtz, Paul; Lovekin, Jim; Copp, John; Buck, Cliff; Adams, Mike

1993-01-28T23:59:59.000Z

150

A comprehensive study of the analysis and economic benefits of radioactive tracer engineered simulation procedures  

SciTech Connect (OSTI)

Hydraulic Fracturing is an important technology to enhance production from tight gas reservoirs. Several techniques have been utilized to attempt to evaluate the effectiveness of hydraulic fracturing treatments. One technique, radioactive tracers, is currently used on over 15 % of the stimulation treatments performed in the U.S. With proper materials, design, and execution, tracers can be used to locate the presence and concentration of proppant at the wellbore in order to evaluate vertical and radial proppant distribution. A comprehensive study of over 100 fracture treatments has been completed in which radioactive tracers were used along with production logs, stress logs, post-fracturing completion reports, and production history to analyze completion effectiveness in four different reservoirs. Additionally, an economic benefit model was constructed to evaluate the benefit/cost ratio of applying the technology.

Fisher, K.; Robinson, B.M.; Voneiff, G.W.

1995-12-31T23:59:59.000Z

151

The Elemental Composition of High-Energy Cosmic Rays: Measurements with TRACER  

E-Print Network [OSTI]

TRACER ('Transition Radiation Array for Cosmic Energetic Radiation') is a balloon borne instrument that has been developed to directly measure the composition and energy spectra of individual heavy elements up to 10^15 eV per particle. TRACER achieves a large geometric factor (5 m^2 sr) through the use of a Transition Radiation Detector utilizing arrays of single wire proportional tubes. TRACER has measured the energy spectra of the elements O, Ne, Mg, Si, S, Ar, Ca, and Fe. The energy spectra reach energies in excess of 10^14 eV per particle and exhibit nearly the same spectral index (2.65 +/- 0.05) for all elements.

P. J. Boyle

2008-10-16T23:59:59.000Z

152

Interpretations of Tracer Tests Performed in the Culebra Dolomite at the Waste Isolation Pilot Plant Site  

SciTech Connect (OSTI)

This report provides (1) an overview of all tracer testing conducted in the Culebra Dolomite Member of the Rustler Formation at the Waste Isolation Pilot Plant (WPP) site, (2) a detailed description of the important information about the 1995-96 tracer tests and the current interpretations of the data, and (3) a summary of the knowledge gained to date through tracer testing in the Culebra. Tracer tests have been used to identify transport processes occurring within the Culebra and quantify relevant parameters for use in performance assessment of the WIPP. The data, especially those from the tests performed in 1995-96, provide valuable insight into transport processes within the Culebra. Interpretations of the tracer tests in combination with geologic information, hydraulic-test information, and laboratory studies have resulted in a greatly improved conceptual model of transport processes within the Culebra. At locations where the transmissivity of the Culebra is low (< 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a single-porosity medium in which advection occurs largely through the primary porosity of the dolomite matrix. At locations where the transmissivity of the Culebra is high (> 4 x 10{sup -6} m{sup 2}/s), we conceptualize the Culebra as a heterogeneous, layered, fractured medium in which advection occurs largely through fractures and solutes diffuse between fractures and matrix at multiple rates. The variations in diffusion rate can be attributed to both variations in fracture spacing (or the spacing of advective pathways) and matrix heterogeneity. Flow and transport appear to be concentrated in the lower Culebra. At all locations, diffusion is the dominant transport process in the portions of the matrix that tracer does not access by flow.

MEIGS,LUCY C.; BEAUHEIM,RICHARD L.; JONES,TOYA L.

2000-08-01T23:59:59.000Z

153

Using Thermally-Degrading, Partitioning, and Nonreactive Tracers to Determine Temperature Distribution and Fracture/Heat Transfer Surface Area in Geothermal Reservoirs  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Project Summary. The goal of this project is to provide integrated tracer and tracer interpretation tools to facilitate quantitative characterization of temperature distributions and surface area available for heat transfer in EGS.

154

ADVANCES IN ATMOSPHERIC SCIENCES, VOL. 25, NO. 5, 2008, 805814 Diagnosing Ocean Tracer Transport from Sellafield  

E-Print Network [OSTI]

DRANGE1,2,3,4 , and Eric DELEERSNIJDER5 1 Nansen Environmental and Remote Sensing Center, Bergen, Norway applications thereof, idealized releases of passive tracers from the nuclear fuel reprocessing plants­814, doi: 10.1007/s00376-008-0805-y. 1. Introduction Estimating the integrated effect of processes acting

Drange, Helge

155

Project EARTH-14-SHELLDP1: Developing Metal Isotope Tracers for Understanding Sediment Depositional Environments  

E-Print Network [OSTI]

Project EARTH-14-SHELLDP1: Developing Metal Isotope Tracers for Understanding Sediment Depositional and the mechanisms behind temporal and spatial variations in organic matter quantity and quality. The project work will involve becoming proficient in clean room procedures, chemical separation techniques

Henderson, Gideon

156

Lignin biomarkers as tracers of mercury sources in lakes water column  

E-Print Network [OSTI]

Lignin biomarkers as tracers of mercury sources in lakes water column Jean-Franc¸ois Ouellet � Marc the autochthonous from the allochthonous organic matter (OM), lignin derived biomarker signa- tures [Lambda, S/V, C/V, P/(V ? S), 3,5-Bd/V and (Ad/Al)v] were used. Since lignin is exclusively produced by terrigenous

Long, Bernard

157

USING LIDAR TO MEASURE PERFLUOROCARBON TRACERS FOR THE VERIFICATION AND MONITORING  

E-Print Network [OSTI]

USING LIDAR TO MEASURE PERFLUOROCARBON TRACERS FOR THE VERIFICATION AND MONITORING OF CAP AND COVER to detect PMCH (perfluoromethylcyclohexane, one of a group of PFTs used at BNL). Laboratory measurements then measured down to 1 ppb-m. These results are very promising and show great potential for monitoring

158

New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas Operations  

E-Print Network [OSTI]

New Tracers Identify Hydraulic Fracturing Fluids and Accidental Releases from Oil and Gas fingerprints of fluids that return to the surface after high volume hydraulic fracturing of unconventional oil the hydraulic fracturing process, resulting in the relative enrichment of boron and lithium in HFFF

Jackson, Robert B.

159

Physical causes and modeling challenges of anomalous diffusion of sediment tracers  

E-Print Network [OSTI]

Physical causes and modeling challenges of anomalous diffusion of sediment tracers Douglas Jerolmack Earth & Environmental Science, UPenn [sediment@sas.upenn.edu] "Bridging the Gap", Princeton U., 2" describable by: 1. Particle volume, v [L3 ]. 2.Average velocity, us , of bed load sediment [L/T]. 3. Surface

160

Ca and 87/86 Sr isotopes as tracers of silicate weathering in small  

E-Print Network [OSTI]

44/40 Ca and 87/86 Sr isotopes as tracers of silicate weathering in small catchments of the Massif, Laboratory Division, Orléans, France 2 U.S. Geological Survey, Water Resources Division, Menlo Park, CA 94025).Measurements of 44/40 Ca isotope ratios (44/40 Ca measured by the double spike method on TIMS and normalized

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "tracer prep blanks" 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

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations during ETEX 2  

E-Print Network [OSTI]

Evaluating the ability of a numerical weather prediction model to forecast tracer concentrations an operational numerical weather prediction model to forecast air quality are also investigated. These potential a numerical weather prediction (NWP) model independently of the CTM. The NWP output is typically archived

Dacre, Helen

162

Dynamic Reservoir Characterization Of Naturally Fractured Reservoirs From An Inter-Well Tracer Test  

E-Print Network [OSTI]

-spot pattern and breakthrough time of the injected tracer. Once the model became capable of matching historical field production, a 1-year prediction run was conducted for optimization. Cumulative oil production was increased by 8,000 bbl by allocating more...

Kilicaslan, Ufuk

2013-12-03T23:59:59.000Z

163

An Improved Gas Chromatographic Method for the Determination of Perfluorocarbon Tracers in the Atmosphere  

Science Journals Connector (OSTI)

......U.S. Department of Energy, New York, New York...U.S. Department of Energy, New York, New York...quantity, hence the cost, of the tracer required...experiments in the geysers geothermal area. RH. Gudiksen...U. S. Department of Energy, New York, NY(1991......

Raymond J. Lagomarsino

1996-09-01T23:59:59.000Z

164

Seasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements  

E-Print Network [OSTI]

of indoor air pollution sources. Concurrently, great efforts are made to make buildings energy efficient 1970s, while less attention has been paid to IAQ. Insufficient venting of indoor air pollutantsSeasonal Variation in Monthly Average Air Change Rates Using Passive Tracer Gas Measurements Marie

Hansen, René Rydhof

165

Analysis of tracer responses in the BULLION Forced-Gradient Experiment at Pahute Mesa, Nevada  

SciTech Connect (OSTI)

This report presents an analysis of the tracer data from the BULLION forced-gradient experiment (FGE) conducted on Pahute Mesa at the Nevada Test Site from June 2, 1997 through August 28, 1997, for the Underground Test Area (UGTA) Program. It also serves to document the polystyrene microsphere data from the FGE. The FGE involved the injection of solute and colloid tracers into wells ER-20-6 No. 1 and ER-20-6 No. 2 while ER-20-6 No. 3 was pumped at approximately 116 gallons per minute (gpm). The experimental configuration and test design are described briefly in this report; more details are provided elsewhere (IT, 1996, 1997, 1998). The tracer responses in the various wells yielded valuable information about transport processes such as longitudinal dispersion, matrix diffusion and colloid transport in the hydrogeologic system in the vicinity of the BULLION nuclear test cavity. Parameter values describing these processes are derived from the semi-analytical model interpretations presented in this report. A companion report (IT, 1998) presents more detailed numerical modeling interpretations of the solute tracer responses.

Paul W. Reimus; Marc J. Haga

1999-10-01T23:59:59.000Z

166

Supporting BioMedical Information Retrieval: The BioTracer Approach  

E-Print Network [OSTI]

Supporting BioMedical Information Retrieval: The BioTracer Approach Heri Ramampiaro1 and Chen Li2 1 biomedical in- formation has put a high demand on existing search systems. Such a tool should be able the relevant ones the highest rank- ing. Focusing on biomedical information, this work investigates how

Li, Chen

167

Advancing Reactive Tracer Methods for Measurement of Thermal Evolution in Geothermal Reservoirs: Final Report  

SciTech Connect (OSTI)

The injection of cold fluids into engineered geothermal system (EGS) and conventional geothermal reservoirs may be done to help extract heat from the subsurface or to maintain pressures within the reservoir (e.g., Rose et al., 2001). As these injected fluids move along fractures, they acquire heat from the rock matrix and remove it from the reservoir as they are extracted to the surface. A consequence of such injection is the migration of a cold-fluid front through the reservoir (Figure 1) that could eventually reach the production well and result in the lowering of the temperature of the produced fluids (thermal breakthrough). Efficient operation of an EGS as well as conventional geothermal systems involving cold-fluid injection requires accurate and timely information about thermal depletion of the reservoir in response to operation. In particular, accurate predictions of the time to thermal breakthrough and subsequent rate of thermal drawdown are necessary for reservoir management, design of fracture stimulation and well drilling programs, and forecasting of economic return. A potential method for estimating migration of a cold front between an injection well and a production well is through application of reactive tracer tests, using chemical whose rate of degradation is dependent on the reservoir temperature between the two wells (e.g., Robinson 1985). With repeated tests, the rate of migration of the thermal front can be determined, and the time to thermal breakthrough calculated. While the basic theory behind the concept of thermal tracers has been understood for some time, effective application of the method has yet to be demonstrated. This report describes results of a study that used several methods to investigate application of reactive tracers to monitoring the thermal evolution of a geothermal reservoir. These methods included (1) mathematical investigation of the sensitivity of known and hypothetical reactive tracers, (2) laboratory testing of novel tracers that would improve method sensitivity, (3) development of a software tool for design and interpretation of reactive tracer tests and (4) field testing of the reactive tracer temperature monitoring concept.

Mitchell A. Plummer; Carl D. Palmer; Earl D. Mattson; Laurence C. Hull; George D. Redden

2011-07-01T23:59:59.000Z

168

Evidence of Multi-Process Matrix Diffusion in a Single Fracturefrom a Field Tracer Test  

SciTech Connect (OSTI)

Compared to values inferred from laboratory tests on matrix cores, many field tracer tests in fractured rock have shown enhanced matrix diffusion coefficient values (obtained using a single-process matrix-diffusion model with a homogeneous matrix diffusion coefficient). To investigate this phenomenon, a conceptual model of multi-process matrix diffusion in a single-fracture system was developed. In this model, three matrix diffusion processes of different diffusion rates were assumed to coexist: (1) diffusion into stagnant water and infilling materials within fractures, (2) diffusion into a degraded matrix zone, and (3) further diffusion into an intact matrix zone. The validity of the conceptual model was then demonstrated by analyzing a unique tracer test conducted using a long-time constant-concentration injection. The tracer-test analysis was conducted using a numerical model capable of tracking the multiple matrix-diffusion processes. The analysis showed that in the degraded zone, a diffusion process with an enhanced diffusion rate controlled the steep rising limb and decay-like falling limb in the observed breakthrough curve, whereas in the intact matrix zone, a process involving a lower diffusion rate affected the long-term middle platform of slowly increasing tracer concentration. The different matrix-diffusion-coefficient values revealed from the field tracer test are consistent with the variability of matrix diffusion coefficient measured for rock cores with different degrees of fracture coating at the same site. By comparing to the matrix diffusion coefficient calibrated using single-process matrix diffusion, we demonstrated that this multi-process matrix diffusion may contribute to the enhanced matrix-diffusion-coefficient values for single-fracture systems at the field scale.

Zhou, Quanlin; Liu, Hui-Hai; Bodvarsson, Gudmundur; Molz, Fred J.

2005-06-11T23:59:59.000Z

169

Overview of SIMS-Based Experimental Studies of Tracer Diffusion in Solids and Application to Mg Self-Diffusion  

SciTech Connect (OSTI)

Tracer diffusivities provide the most fundamental information on diffusion in materials and are the foundation of robust diffusion databases. Compared to traditional radiotracer techniques that utilize radioactive isotopes, the secondary ion mass spectrometry (SIMS) based thin-film technique for tracer diffusion is based on the use of enriched stable isotopes that can be accurately profiled using SIMS. Experimental procedures & techniques that are utilized for the measurement of tracer diffusion coefficients are presented for pure magnesium, which presents some unique challenges due to the ease of oxidation. The development of a modified Shewmon-Rhines diffusion capsule for annealing Mg and an ultra-high vacuum (UHV) system for sputter deposition of Mg isotopes are discussed. Optimized conditions for accurate SIMS depth profiling in polycrystalline Mg are provided. An automated procedure for the correction of heat-up and cool-down times during tracer diffusion annealing is discussed. The non-linear fitting of a SIMS depth profile data using the thin film Gaussian solution to obtain the tracer diffusivity along with the background tracer concentration and tracer film thickness is discussed. An Arrhenius fit of the Mg self-diffusion data obtained using the low-temperature SIMS measurements from this study and the high-temperature radiotracer measurements of Shewmon and Rhines (1954) was found to be a good representation of both types of diffusion data that cover a broad range of temperatures between 250 - 627 C (523 900 K).

Kulkarni, Nagraj S [ORNL; Warmack, Robert J Bruce [ORNL; Radhakrishnan, Balasubramaniam [ORNL; HunterJr., Jerry [Virginia Polytechnic Institute and State University; Sohn, Yong Ho [University of Central Florida; Coffey, Kevin [University of Central Florida; Murch, Prof. Graeme [University of Newcastle, NSW, Australia; Belova, Irina [University of Newcastle, NSW, Australia

2014-01-01T23:59:59.000Z

170

Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain site characterization project: Quality Assurance Project Plan, Revision 1; Quarterly progress report, October 1, 1993--December 31, 1993  

SciTech Connect (OSTI)

The purpose of this work is to identify and characterize candidate conservative organic tracers for use as hydrologic tracers for experiments to be conducted at the Yucca Mountain C-well complex. During this quarter the main effort was directed towards rewriting the quality assurance program in preparation for a review and audit by the USGS. However, due to budget constraints the review and audit were not carried out. The tracer QA plan and standard operating procedures (SOPs) were revised and copies are included in the report. Instrumental problems were encountered and corrected with the addition of new integration and sample control software. In the sampling, there was an unexplained peak in the chromatograms of the tracers being tested in the light tuff. This was not correctable and these experiments will be repeated in the next quarter.

Stetzenbach, K.J.

1993-12-13T23:59:59.000Z

171

TRACER DETECTION TECHNOLOGY CORP. PRODUCTS AND SERVICES FOR CORPORATE AND GOVERNMENT SECURITY  

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

TRACER DETECTION TECHNOLOGY CORP. TRACER DETECTION TECHNOLOGY CORP. PRODUCTS AND SERVICES FOR CORPORATE AND GOVERNMENT SECURITY 3463 MAGIC DRIVE, SUITE T-19 SAN ANTONIO, TX 78229 March 29, 2009 Office of the Assistant General Counsel for Technology Transfer and Intellectual Property U.S. Department of Energy 1000 Independence Ave., SW. Washington, DC 20585. GC-62@hq.doe.gov ATTN: TECHNOLOGY TRANSFER QUESTIONS. Response to Request for Information - Federal Register "The Costs and Benefits of Dealing with Federal Laboratories" This "white paper" is intended to deal constructively with issues relating to technology transfer and interaction of small businesses with federal laboratories, and should be considered a response to #6 (other). As a small businessman and entrepreneur engaged in the

172

TRACER DETECTION TECHNOLOGY CORP. PRODUCTS AND SERVICES FOR CORPORATE AND GOVERNMENT SECURITY  

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

TRACER DETECTION TECHNOLOGY CORP. TRACER DETECTION TECHNOLOGY CORP. PRODUCTS AND SERVICES FOR CORPORATE AND GOVERNMENT SECURITY 3463 MAGIC DRIVE, SUITE T-19 SAN ANTONIO, TX 78229 March 29, 2009 Office of the Assistant General Counsel for Technology Transfer and Intellectual Property U.S. Department of Energy 1000 Independence Ave., SW. Washington, DC 20585. GC-62@hq.doe.gov ATTN: TECHNOLOGY TRANSFER QUESTIONS. Response to Request for Information - Federal Register "The Costs and Benefits of Dealing with Federal Laboratories" This "white paper" is intended to deal constructively with issues relating to technology transfer and interaction of small businesses with federal laboratories, and should be considered a response to #6 (other). As a small businessman and entrepreneur engaged in the

173

Evaluation of Tracers for Use in the International Field Experiment on CO2 Ocean Sequestration  

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

Tracers for Use in the International Field Experiment Tracers for Use in the International Field Experiment on CO 2 Ocean Sequestration E. Eric Adams (eeadams@mit.edu; 617-253-6595) Dept. of Civil and Environmental Engineering Massachusetts Institute of Technology Cambridge, MA 02139 USA Introduction An international field experiment is scheduled to take place off of the west coast of the big island of Hawaii during the second half of 2001 (Adams, et al., 1999; Herzog, et al., 2000). Scientists representing some dozen institutions in five countries on four continents are expected to participate. The experiment will involve several sub-experiments in which CO 2 will be released at a depth of 800 m as a buoyant liquid at rates of 0.1 to 1.0 kg/s. The releases will each be made for a duration of about one hour using nozzles with differing diameters and numbers of ports.

174

Flux Measurements of Volatile Organic Compounds from an Urban Tower Platform in Houston, Texas: Trends and Tracers  

E-Print Network [OSTI]

and traffic counts except during variable working hours. To assign measured fluxes to local sources, we tested a bulk flux footprint model (Kormann and Meixner model) designed for uniform emission surface areas in this urban, heterogeneous landscape. Tracer...

Hale, Martin C

2014-05-08T23:59:59.000Z

175

Integrated Approach to Use Natural Chemical and Isotopic Tracers to Estimate Fracture Spacing and Surface Area in EGS Systems  

Broader source: Energy.gov [DOE]

DOE Geothermal Peer Review 2010 - Presentation. This objective of this project is to develop an innovative approach to estimate fracture surface area and spacing through interpretation of signals of natural chemical and isotopic tracers.

176

Field studies of streamflow generation using natural and injected tracers on Bickford and Walker Branch Watersheds  

SciTech Connect (OSTI)

Field studies of streamflow generation were undertaken on two forested watersheds, the West Road subcatchment of Bickford Watershed in central Massachusetts and the West Fork of Walker Branch Watershed in eastern Tennessee. A major component of the research was development of a two-stage methodology for the use of naturally-occurring {sup 222}Rn as a tracer. The first of the two stages was solving a mass-balance equation for {sup 222}Rn around a stream reach of interest in order to calculate Rn{sub q}, the {sup 222}Rn content of the lateral inflow to the reach; a conservative tracer (chloride) and a volatile tracer (propane) were injected into the study stream to account for lateral inflow to, and volatilization from, the study reach. The second stage involved quantitative comparison of Rn{sub q} to the measured {sup 222}Rn concentrations of different subsurface waters in order to assess how important these waters were in contributing lateral inflow to the stream reach.

Genereux, D.; Hemond, H. (Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Civil Engineering); Mulholland, P. (Oak Ridge National Lab., TN (United States))

1992-05-01T23:59:59.000Z

177

Comparison of observed and predicted short-term tracer gas concentrations in the atmosphere  

SciTech Connect (OSTI)

The Savannah River Laboratory is in the process of conducting a series of atmospheric tracer studies. The inert gas sulfurhexafluoride is released from a height of 62 m for 15 min and concentrations in air are measured on sampling arcs up to 30 km downwind of the release point. Maximum 15 min. air concentrations from 14 of these tracer tests have been compared with the ground-level, centerline air concentration predicted with a Gaussian plume atmospheric transport model using eight different sets of atmospheric dispersion parameters. Preliminary analysis of the results from these comparisons indicates that the dispersion parameters developed at Juelich, West Germany, based on tracers released from a height of 50 m, give the best overall agreement between the predicted and observed values. The median value of the ratio of predicted to observed air concentrations for this set of parameters is 1.3, and the correlation coefficient between the log of the predictions and the log of the observations is 0.72. For the commonly used Pasquill-Gifford dispersion parameters, the values of these same statistics are 4.4 and 0.68, respectively. The Gaussian plume model is widely used to predict air concentrations resulting from short-term radionuclide release to the atmosphere. The results of comparisons such as these must be considered whenever the Gaussian model is used for such purposes. 22 references, 3 tables.

Cotter, S.J.; Miller, C.W.; Lin, W.C.T.

1985-01-01T23:59:59.000Z

178

High-resolution stratospheric tracer fields estimated from satellite observations using Lagrangian trajectory calculations  

SciTech Connect (OSTI)

A technique is introduced by which high-resolution tracer fields may be constructed from low-resolution satellite observations. The technique relies upon the continual cascade of tracer variance from large to small scales and makes use of wind fields generated by a data assimilation scheme. To demonstrate its usefulness, the technique has been applied in a study of isentropic distributions of nitrous oxide in the winter midstratosphere, using measurements made by the Improved Stratospheric and Mesospheric Sounder (ISAMS) instrument on the Upper Atmosphere Research Satellite (UARS). The results show that the high-resolution fields significantly increase the amount of information that is available from the satellite observations. The fields give insights into the characteristic structure and evolution of tracer distributions at scales that are normally obscured from view. Two results are particularly noteworthy. First, at the interface between low and middle latitudes there is evidence of active mixing. This mixing occurs on the eastern, equatorward side of air that is being drawn toward high latitudes around the polar vortex. Second, in the anticyclone, a complex pattern of transport is revealed. Air drawn in from low latitudes spirals together with ambient midlatitude air. Small scales are generated relatively slowly in the organized flow, and persistent filamentary structures, with transverse scales of hundreds of kilometers or greater, are seen.

Sutton, R.T.; Maclean, H.; Swinbank, R.; O`Neill, A.; Taylor, F.W. [Oxford Univ., Oxford (United Kingdom)] [Oxford Univ., Oxford (United Kingdom); [Meteorological Office, Bracknell, Berkshire (United Kingdom); [Univ. of Reading, Reading (United Kingdom)

1994-10-01T23:59:59.000Z

179

Uncertainties in Air Exchange using Continuous-Injection, Long-Term Sampling Tracer-Gas Methods  

SciTech Connect (OSTI)

The PerFluorocarbon Tracer (PFT) method is a low-cost approach commonly used for measuring air exchange in buildings using tracer gases. It is a specific application of the more general Continuous-Injection, Long-Term Sampling (CILTS) method. The technique is widely used but there has been little work on understanding the uncertainties (both precision and bias) associated with its use, particularly given that it is typically deployed by untrained or lightly trained people to minimize experimental costs. In this article we will conduct a first-principles error analysis to estimate the uncertainties and then compare that analysis to CILTS measurements that were over-sampled, through the use of multiple tracers and emitter and sampler distribution patterns, in three houses. We find that the CILTS method can have an overall uncertainty of 10-15percent in ideal circumstances, but that even in highly controlled field experiments done by trained experimenters expected uncertainties are about 20percent. In addition, there are many field conditions (such as open windows) where CILTS is not likely to provide any quantitative data. Even avoiding the worst situations of assumption violations CILTS should be considered as having a something like a ?factor of two? uncertainty for the broad field trials that it is typically used in. We provide guidance on how to deploy CILTS and design the experiment to minimize uncertainties.

Sherman, Max H.; Walker, Iain S.; Lunden, Melissa M.

2013-12-01T23:59:59.000Z

180

Quantification of multiple methane emission sources at landfills using a double tracer technique  

SciTech Connect (OSTI)

Research highlights: > Precise and reliable measurements of emissions from landfills are needed. > A tracer technique involving simultaneous release of two tracers was proven successful. > Measurements to be performed at times with low changing trends in barometric pressure. - Abstract: A double tracer technique was used successfully to quantify whole-site methane (CH{sub 4}) emissions from Fakse Landfill. Emissions from different sections of the landfill were quantified by using two different tracers. A scaled-down version of the tracer technique measuring close-by to localized sources having limited areal extent was also used to quantify emissions from on-site sources at the landfill facility, including a composting area and a sewage sludge storage pit. Three field campaigns were performed. At all three field campaigns an overall leak search showed that the CH{sub 4} emissions from the old landfill section were localized to the leachate collection wells and slope areas. The average CH{sub 4} emissions from the old landfill section were quantified to be 32.6 {+-} 7.4 kg CH{sub 4} h{sup -1}, whereas the source at the new section was quantified to be 10.3 {+-} 5.3 kg CH{sub 4} h{sup -1}. The CH{sub 4} emission from the compost area was 0.5 {+-} 0.25 kg CH{sub 4} h{sup -1}, whereas the carbon dioxide (CO{sub 2}) and nitrous oxide (N{sub 2}O) flux was quantified to be in the order of 332 {+-} 166 kg CO{sub 2} h{sup -1} and 0.06 {+-} 0.03 kg N{sub 2}O h{sup -1}, respectively. The sludge pit located west of the compost material was quantified to have an emission of 2.4 {+-} 0.63 kg h{sup -1} CH{sub 4}, and 0.03 {+-} 0.01 kg h{sup -1} N{sub 2}O.

Scheutz, C., E-mail: chs@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark); Samuelsson, J., E-mail: jerker.samuelsson@fluxsense.se [Chalmers University of Technology/FluxSense AB, SE-412 96 Goeteborg (Sweden); Fredenslund, A.M., E-mail: amf@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark); Kjeldsen, P., E-mail: pk@env.dtu.dk [Department of Environmental Engineering, Technical University of Denmark, Miljovej, Building 113, 2800 Kongens Lyngby (Denmark)

2011-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

A new statistical dispersion model for tracer tests and contaminant spread in porous media  

SciTech Connect (OSTI)

Dispersion of solutes moving in permeable media is an essential control to describe fluid flow in permeable media. Dispersion can be thought of as a spreading of a solute caused by the presence of microscopic inhomogeneities. An accurate model for dispersion is needed for accurate estimation of oil recovery efficiencies and clean up costs of subsurface contaminants. Current approaches utilizing the fickian assumption fall short in describing the real physics of spreading during a solute transport process. Numerous field investigations have shown that dispersivities measured in the field are much larger than those measured in the lab for the same type of porous material. Moreover, field measured dispersivities have been shown to be scale dependent, that is, a tracer test conducted over a longer travel path will yield a larger dispersivity value than a tracer test conducted in the same geologic formation over a shorter travel path. Numerous approaches to address this problem have been developed yet none attempted to go beyond the Fickian dispersion assumption. In this study, a convective dispersivity is introduced. New model assumes that dispersion is dimensionless and mainly determined by pore size distribution. The new model results in a spread that increases linearly with time contrary to conventional model, which predicts a mixing zone length that increases with square root of time. Therefore, new model explains the field test results that indicate increasing dispersivity with distance. The model validations are in perfect agreement with experimental results, which include; Ganapathy et al.`s slug experiment on Antolini sandstone, Handy`s radioactive tracer experiment on Alhambra sandstone, and CT experiment conducted at BDM-OK/NIPER facilities on Tallant sandstone.

Ates, H.; Kasap, E. [Univ. of Tulsa, OK (United States)

1995-12-31T23:59:59.000Z

182

LANSCE | Lujan Center | Chemical & Sample Prep  

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

Chemical & Sample Preparation Chemical & Sample Preparation For general questions, please contact the Lujan Center Chemical and Sample Preparation Laboratory responsible: Monika Hartl | hartl@lanl.gov | 505.665.2375 Sample and Equipment Shipping Instructions For questions regarding shipping procedures, contact Lujan Center Experiment Coordinator: Leilani Conradson | leilani@lanl.gov | 505.665.9505 Chemistry Laboratories High-Pressure Laboratory X-ray Laboratory Spectroscopy Laboratory Clean Room Glove box - He atmosphere High-purity water Diamond anvils Rotating anode generators (reflectometry, residual stress, powder diffraction) Zeiss microscope (with fluorescence abilities) Tube and box furnaces Ultrasonic bath ZAP-cell (for in situ diffraction at high P) Infrared spectrometer Brewster angle microscope

183

Yeast Genomic DNA Prep Sterile distilled water  

E-Print Network [OSTI]

.1 M EDTA (pH 8.0), 0.1% SDS Lyticase ( or T100 Zymolase) 95% Ethanol 70% Ethanol 10 mg/ml Rnase phenol extract 3 times (make sure to avoid interface) 13.Ethanol precipitate (no salt)-allow to sit at -20°C for 15-60 minutes. 14.Spin for 30 minutes at maximum speed at 4°C. 15.Wash with 70% Ethanol and dry

Auble, David

184

Neural network approaches to tracer identification as related to PIV research  

SciTech Connect (OSTI)

Neural networks have become very powerful tools in many fields of interest. This thesis examines the application of neural networks to another rapidly growing field flow visualization. Flow visualization research is used to experimentally determine how fluids behave and to verify computational results obtained analytically. A form of flow visualization, particle image velocimetry (PIV). determines the flow movement by tracking neutrally buoyant particles suspended in the fluid. PIV research has begun to improve rapidly with the advent of digital imagers, which can quickly digitize an image into arrays of grey levels. These grey level arrays are analyzed to determine the location of the tracer particles. Once the particles positions have been determined across multiple image frames, it is possible to track their movements, and hence, the flow of the fluid. This thesis explores the potential of several different neural networks to identify the positions of the tracer particles. Among these networks are Backpropagation, Kohonen (counter-propagation), and Cellular. Each of these algorithms were employed in their basic form, and training and testing were performed on a synthetic grey level array. Modifications were then made to them in attempts to improve the results.

Seeley, C.H. Jr.

1992-12-01T23:59:59.000Z

185

CO2 tracer gas concentration decay method for measuring air change rate  

Science Journals Connector (OSTI)

Abstract The measure of air change rate (ACR) in building is a difficult and usually expensive task. The tracer gas method is the reference technique but its implementation is difficult and the interpretation of results is not straightforward. In the present work, the concentration decay method by multiple CO2 transmitters is experimentally validated in the case of cross-ventilation. It is observed that in-situ CO2 transmitters lead to ACR values in good agreement with reference measurements obtained from mechanically controlled values. Whereas multiple transmitters in different sampling positions show the imperfect mixing, a sensor located at the outlet or an averaged value of all sensors can provide an accurate measure of the ACR. Moreover, the spatial variation of CO2 concentration can be used to assess the ventilation efficiency in the test chamber. Different measures and calculation methods are discussed, and the uncertainty analysis of each method is carried out.

Shuqing Cui; Michaël Cohen; Pascal Stabat; Dominique Marchio

2015-01-01T23:59:59.000Z

186

Mixing properties in the advection of passive tracers via recurrences and extreme value theory  

E-Print Network [OSTI]

In this paper we characterize the mixing properties in the advection of passive tracers by exploiting the extreme value theory for dynamical systems. With respect to classical techniques directly related to the Poincar\\'e recurrences analysis, our method provides reliable estimations of the characteristic mixing times and distinguishes between barriers and unstable fixed points. The method is based on a check of convergence for extreme value laws on finite datasets. We define the mixing times in terms of the shortest time intervals such that extremes converge to the asymptotic (known) parameters of the Generalized Extreme Value distribution. Our technique is suitable for applications in the analysis of other systems where mixing time scales need to be determined and limited datasets are available.

Davide Faranda; Xavier Leoncini; Sandro Vaienti

2014-02-16T23:59:59.000Z

187

Using conversions of chemically reacting tracers for numerical determination of temperature profiles in flowing systems and temperature histories in batch systems  

SciTech Connect (OSTI)

This report presents the mathematical bases for measuring internal temperatures within batch and flowing systems using chemically reacting tracers. This approach can obtain temperature profiles of plug-flow systems and temperature histories within batch systems. The differential equations for reactant conversion can be converted into Fredholm integral equations of the first kind. The experimental variable is the tracer-reaction activation energy. When more than one tracer is used, the reactions must have different activation energies to gain information. In systems with temperature extrema, multiple solutions for the temperature profiles or histories can exist, When a single parameter in the temperature distribution is needed, a single-tracer test may furnish this information. For multi-reaction tracer tests, three Fredholm equations are developed. Effects of tracer-reaction activation energy, number of tracers used, and error in the data are evaluated. The methods can determine temperature histories and profiles for many existing systems, and can be a basis for analysis of the more complicated dispersed-flow systems. An alternative to using the Fredholm-equation approach is the use of an assumed temperature- distribution function and incorporation of this function into the basic integral equation describing tracer behavior. The function contains adjustable parameters which are optimized to give the temperature distribution. The iterative Fredholm equation method is tested to see what is required to discriminate between two models of the temperature behavior of Hot Dry Rock (HDR) geothermal reservoirs. Experimentally, ester and amide hydrolyses are valid HDR tracer reactions for measuring temperatures in the range 75-100{degrees}C. Hydrolyses of bromobenzene derivatives are valid HDR tracer reactions for measuring temperatures in the range 150-275{degrees}C.

Brown, L.F.; Chemburkar, R.M.; Robinson, B.A.; Travis, B.J.

1996-04-01T23:59:59.000Z

188

Comparison of the optoacoustic and Hg tracer methods for the study of energy-transfer processes in gas mixtures  

SciTech Connect (OSTI)

Rates of energy transfer from vibrationally excited SF/sub 6/ and pentafluorobenzene to argon in the gas phase have been studied by using the Hg tracer technique and time-resolved optoacoustics. These two techniques which rely on fundamentally different physical principles were found to give equivalent results. The implications for the study of energy-transfer processes in gas mixtures are discussed.

Wallington, T.J.; Braun, W.; Beck, K.M.; Gordon, R.J.

1988-06-30T23:59:59.000Z

189

{sup 41}Ca as a tracer for calcium uptake and deposition in heart tissue during ischemia and reperfusion  

SciTech Connect (OSTI)

We have developed techniques and are commencing experiments using enriched {sup 41}Ca as a tracer in isolated rabbit heart preparations. The aims of the study are to measure calcium uptake and deposition in response to cardiac ischemia and reperfusion, and to investigate events and mechanism leading to irreversible myocyte injury.

Southon, J.R. [Lawrence Livermore National Lab., CA (United States); Bishop, M.S.; Kost, G.J. [California Univ., Davis, CA (United States). Dept. of Medical Pathology and Biomedical Engineering

1993-09-17T23:59:59.000Z

190

Using CO2 Lidar for Standoff Detection of a Perfluorocarbon Tracer in Air  

SciTech Connect (OSTI)

The Tag, Track and Location System Program (TTL) is investigating the use of PFTs as tracers for tagging and tracking items of interest or fallen soldiers. In order for the tagging and tracking to be valuable there must be a location system that can detect the PFTs. This report details the development of an infrared lidar platform for standoff detection of PFTs released into the air from a tagged object or person. Furthering work performed using a table top lidar system in an indoor environment; a mobile mini lidar platform was assembled using an existing Raman lidar platform, a grating tunable CO{sub 2} IR laser, Judson HgCdTe detector and miscellaneous folding optics and electronics. The lidar achieved {approx}200 ppb-m sensitivity in laboratory and indoor testing and was then successfully demonstrated at an outdoor test. The lidar system was able to detect PFTs released into a vehicle from a distance of 100 meters. In its final, fully optimized configuration the lidar was capable of repeatedly detecting PFTs in the air released from tagged vehicles. Responses were immediate and clear. This report details the results of a proof-of-concept demonstration for standoff detection of a perfluorocarbon tracer (PFT) using infrared lidar. The project is part of the Tag, Track and Location System Program and was performed under a contract with Tracer Detection Technology Corp. with funding from the Office of Naval Research. A lidar capable of detecting PFT releases at distance was assembled by modifying an existing Raman lidar platform by incorporating a grating tunable CO{sub 2} IR laser, Judson HgCdTe detector and miscellaneous folding optics and electronics. The lidar achieved {approx}200 ppb-m sensitivity in laboratory and indoor testing and was successfully demonstrated at an outdoor test. The demonstration test (scripted by the sponsor) consisted of three parked cars, two of which were tagged with the PFT. The cars were located 70 (closest) to 100 meters (farthest) from the lidar (the lidar beam path was limited by site constraints and was {approx}100 meters). When one door of each of the cars was opened (sequentially), the lidar was clearly able to determine which vehicles had been tagged and which one was not. The lidar is probably capable of greater than 0.5 kilometer standoff distances based on the extreme amount of signal return achieved (so much that the system had to be de-tuned). The BNL lidar system, while optimized to the extent possible with available parts and budget, was not as sensitive as it could be. Steps to improve the lidar are detailed in this report and include using a better laser system (for more stable power output), dual wavelengths (to improve the sensitivity and allow common mode noise reduction and to allow the use of the lidar in a scanning configuration), heterodyning (for range resolved PFT detection) and an off-axis optical configuration (for improved near field sensitivity).

Heiser,J.H.; Smith, S.; Sedlacek, A.

2008-02-06T23:59:59.000Z

191

Quantitative determination of collateral anterior olfactory nucleus projections using a fluorescent tracer with an algebraic solution to the problem of double retrograde labeling  

Science Journals Connector (OSTI)

The bilateral projections of the rat anterior olfactory nucleus (AON) were evaluated using retrograde fluorescent tracers. Competitive effects of these tracers led to severe underestimation of bilaterally projecting neurons, when double-labeled cells were counted. The underestimate was corrected using a numerical approach, which is of general utility for problems in double labeling and requires only a single tracer. With this method we estimated that approximately 63% of AON neurons project bilaterally to the olfactory bulbs, except for the external part which projects exclusively to the contralateral olfactory bulb. No other AON neurons project only to the contralateral bulb.

George F. Alheid; Jørn Carlsen; Jose de Olmos; Lennart Heimer

1984-01-01T23:59:59.000Z

192

Aluminum Formability Extension through Superior Blank Processing  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

193

DECEMBER 2009 THIS PAGE INTENTIONALLY LEFT BLANK  

E-Print Network [OSTI]

for heating or cooking; hardware; sewing accessories; Christmas light sets; ink; small arms ammunition

194

Blank copy of Green Exam 2  

E-Print Network [OSTI]

Dan is trying to decide between two cars to purchase. Car A costs $16,750 ... per year to maintain. Car B costs $20,125 and requires $750 per year to maintain.

User

2010-04-14T23:59:59.000Z

195

Monitoring of saline tracer movement with vertically distributed self-potential measurements at the HOBE agricultural test site, Voulund, Denmark  

E-Print Network [OSTI]

The self-potential (SP) method is sensitive to water fluxes in saturated and partially saturated porous media, such as those associated with rainwater infiltration and groundwater recharge. We present a field-based study at the Voulund agricultural test site, Denmark, that is, to the best of our knowledge, the first to focus on the vertical self-potential distribution prior to and during a saline tracer test. A coupled hydrogeophysical modeling framework is used to simulate the SP response to precipitation and saline tracer infiltration. A layered hydrological model is first obtained by inverting dielectric and matric potential data. The resulting model that compares favorably with electrical resistance tomography models is subsequently used to predict the SP response. The electrokinetic contribution (caused by water fluxes in a charged porous soil) is modeled by an effective excess charge approach that considers both water saturation and pore water salinity. Our results suggest that the effective excess char...

Jougnot, Damien; Haarder, Eline B; Looms, Majken C

2015-01-01T23:59:59.000Z

196

Preliminary Interpretation of a Radionuclide and Colloid Tracer Test in a Granodiorite Shear Zone at the Grimsel Test Site, Switzerland  

SciTech Connect (OSTI)

In February and March 2012, a tracer test involving the injection of a radionuclide-colloid cocktail was conducted in the MI shear zone at the Grimsel Test Site, Switzerland, as part of the Colloids Formation and Migration (CFM) project. The colloids were derived from FEBEX bentonite, which is mined in Spain and is being considered as a potential waste package backfill in a Spanish nuclear waste repository. The tracer test, designated test 12-02 (second test in 2012), involved the injection of the tracer cocktail into borehole CFM 06.002i2 and extraction from the Pinkel surface packer at the main access tunnel wall approximately 6.1 m from the injection interval. The test configuration is depicted in Figure 1. This configuration has been used in several conservative tracer tests and two colloid-homologue tracer tests since 2007, and it is will be employed in an upcoming test involving the emplacement of a radionuclide-doped bentonite plug into CFM 06.002i2 to evaluate the swelling and erosion of the bentonite and the transport of bentonite colloids and radionuclides from the source to the extraction point at the tunnel wall. Interpretive analyses of several of the previous tracer tests, from 09-01 through 12-02 were provided in two previous Used Fuel Disposition Program milestone reports (Arnold et al., 2011; Kersting et al., 2012). However, only the data for the conservative tracer Amino-G Acid was previously analyzed from test 12-02 because the other tracer data from this test were not available at the time. This report documents the first attempt to quantitatively analyze the radionuclide and colloid breakthrough curves from CFM test 12-02. This report was originally intended to also include an experimental assessment of colloid-facilitated transport of uranium by bentonite colloids in the Grimsel system, but this assessment was not conducted because it was reported by German collaborators at the Karlsruhe Institute of Technology (KIT) that neither uranium nor neptunium adsorbed appreciably to FEBEX bentonite colloids in Grimsel groundwater (Huber et al., 2011). The Grimsel groundwater has a relatively high pH of {approx}9, so the lack of uranium and neptunium adsorption to clay is not surprising given the tendency for these actinides to form very stable negative or neutrally-charged uranyl- or calcium-uranyl-carbonate complexes at these pH, particularly in a water that is effectively saturated with respect to calcite. It was also observed in testing conducted at LANL earlier in 2012 that uranium did not adsorb measurably to Grimsel granodiorite in a synthetic Grimsel groundwater at pH {approx}8.5 (Kersting et al., 2012). Thus, the planned experimental work was not pursued because all the available information clearly pointed to an expected result that uranium transport would not be facilitated by clay colloids in the Grimsel system.

Reimus, Paul W. [Los Alamos National Laboratory

2012-08-30T23:59:59.000Z

197

Spectroscopic diagnostics for ablation cloud of tracer-encapsulated solid pellet in LHD  

SciTech Connect (OSTI)

In the Large Helical Device (LHD), various spectroscopic diagnostics have been applied to study the ablation process of an advanced impurity pellet, tracer-encapsulated solid pellet (TESPEL). The total light emission from the ablation cloud of TESPEL is measured by photomultipliers equipped with individual interference filters, which provide information about the TESPEL penetration depth. The spectra emitted from the TESPEL ablation cloud are measured with a 250 mm Czerny-Turner spectrometer equipped with an intensified charge coupled device detector, which is operated in the fast kinetic mode. This diagnostic allows us to evaluate the temporal evolution of the electron density in the TESPEL ablation cloud. In order to gain information about the spatial distribution of the cloud parameters, a nine image optical system that can simultaneously acquire nine images of the TESPEL ablation cloud has recently been developed. Several images of the TESPEL ablation cloud in different spectral domains will give us the spatial distribution of the TESPEL cloud density and temperature.

Tamura, N.; Kalinina, D. V.; Sato, K.; Sudo, S. [National Institute for Fusion Science, 322-6, Oroshi-cho, Toki-City, Gifu 509-5292 (Japan); Sergeev, V. Yu.; Miroshnikov, I. V.; Sharov, I. A.; Bakhareva, O. A.; Ivanova, D. M.; Timokhin, V. M. [State Polytechnical University, Politechnicheskaya 29, St. Petersburg 195251 (Russian Federation); Kuteev, B. V. [Nuclear Fusion Institute, RRC 'Kurchatov Institute', Kurchatov square 1, Moscow 123182 (Russian Federation)

2008-10-15T23:59:59.000Z

198

Applications of radioactive tracer technology in the real-time measurement of wear and corrosion  

Science Journals Connector (OSTI)

Radioactive tracer technology has been used for many years as a tool to make highly sensitive real-time measurements of wear and corrosion. With this technique, the material of interest is tagged with radioactive isotopes through either direct activation of a relatively small number of atoms in the component itself, or implantation of radioactive isotopes. As the component wears or corrodes under test, radioactive atoms are transported from the surface in the form of wear particles or corrosion products. Wear or corrosion is measured in real-time through either interrogation of the buildup of radioactivity in the transport fluid, or by the reduction in activity of the labeled wear component. The process involves selection of an appropriate labeling technique, labeling of a component or components of interest, calibration, testing and data reduction and analysis. Although the majority of the work performed has been in the automotive engine and lubricant industry, Southwest Research Institute® has recently extended the application into other fields, such as hydraulic pump wear, prosthetic hip joint wear, wear in marine engines and crude oil corrosivity. This paper discusses the various techniques employed to label components of interest, the advantages of the techniques, and gives several examples of current applications of this technology.

D.C. Eberle; C.M. Wall; M.B. Treuhaft

2005-01-01T23:59:59.000Z

199

Reservoir characterization based on tracer response and rank analysis of production and injection rates  

SciTech Connect (OSTI)

Quantification of the spatial distribution of properties is important for many reservoir-engineering applications. But, before applying any reservoir-characterization technique, the type of problem to be tackled and the information available should be analyzed. This is important because difficulties arise in reservoirs where production records are the only information for analysis. This paper presents the results of a practical technique to determine preferential flow trends in a reservoir. The technique is a combination of reservoir geology, tracer data, and Spearman rank correlation coefficient analysis. The Spearman analysis, in particular, will prove to be important because it appears to be insightful and uses injection/production data that are prevalent in circumstances where other data are nonexistent. The technique is applied to the North Buck Draw field, Campbell County, Wyoming. This work provides guidelines to assess information about reservoir continuity in interwell regions from widely available measurements of production and injection rates at existing wells. The information gained from the application of this technique can contribute to both the daily reservoir management and the future design, control, and interpretation of subsequent projects in the reservoir, without the need for additional data.

Refunjol, B.T. [Lagoven, S.A., Pdvsa (Venezuela); Lake, L.W. [Univ. of Texas, Austin, TX (United States)

1997-08-01T23:59:59.000Z

200

Tracer method to measure landfill gas emissions from leachate collection systems  

Science Journals Connector (OSTI)

This paper describes a method developed for quantification of gas emissions from the leachate collection system at landfills and present emission data measured at two Danish landfills with no landfill gas collection systems in place: Fakse landfill and AV Miljø. Landfill top covers are often designed to prevent infiltration of water and thus are made from low permeable materials. At such sites a large part of the gas will often emit through other pathways such as the leachate collection system. These point releases of gaseous constituents from these locations cannot be measured using traditional flux chambers, which are often used to measure gas emissions from landfills. Comparing tracer measurements of methane (CH4) emissions from leachate systems at Fakse landfill and AV Miljø to measurements of total CH4 emissions, it was found that approximately 47% (351 kg CH4 d?1) and 27% (211 kg CH4 d?1), respectively, of the CH4 emitting from the sites occurred from the leachate collection systems. Emission rates observed from individual leachate collection wells at the two landfills ranged from 0.1 to 76 kg CH4 d?1. A strong influence on emission rates caused by rise and fall in atmospheric pressure was observed when continuously measuring emission from a leachate well over a week. Emission of CH4 was one to two orders of magnitude higher during periods of decreasing pressure compared to periods of increasing pressure.

Anders M. Fredenslund; Charlotte Scheutz; Peter Kjeldsen

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Mapping subsurface radionuclide migration and groundwater flow with organic tracers. [Shallow-land burial  

SciTech Connect (OSTI)

At Pacific Northwest Laboratory we have had the opportunity to study the subsurface migration of radionuclides at the Maxey Flats burial site. We constructed an experimental study area adjacent to one of the waste-filled trenches at the site. In this report we describe some preliminary results of organic research currently underway at Maxey Flats. This research is aimed at: (1) elucidating the role of organic species in the subsurface migration of radionuclides; and (2) testing the usefulness of artificial and in situ organic groundwater tracers for mapping radionuclide migration and groundwater flow. We also describe two analytical procedures developed for this research. First, as part of a survey study of organics in Maxey Flats groundwater we have developed a procedure for the isolation and characterization of trace levels of organics in radioactive groundwaters. Second, for a detailed chemical speciation study we developed a procedure based on steric exclusion chromatography for testing whether or not organics are chelated to radionuclides. 1 figure, 1 table.

Toste, A.P.; Kirby, L.J.; Pahl, T.R.; Myers, R.B.

1983-10-01T23:59:59.000Z

202

Wear Measurement of Highly Cross-linked UHMWPE using a 7Be Tracer Implantation Technique  

SciTech Connect (OSTI)

The very low wear rates achieved with the current highly cross-linked ultrahigh molecular weight polyethylenes (UHMWPE) used in joint prostheses have proven to be difficult to measure accurately by gravimetry. Tracer methods are there- fore being explored. The purpose of this study was to perform a proof-of-concept experiment on the use of the radioactive tracer beryllium-7 (7Be) for the determination of in vitro wear in a highly cross-linked orthopedic UHMWPE. Three cross-linked and four conventional UHMWPE pins made from compression- molded GUR 1050, were activated with 109 to 1010 7Be nuclei using a new implantation setup that produced a homogenous distribution of implanted nuclei up to 8.5 lm below the surface. The pins were tested for wear in a six-station pin-on-flat appara- tus for up to 7.1 million cycles (178 km). A Germanium gamma detector was employed to determine activity loss of the UHMWPE pins at preset intervals during the wear test. The wear of the cross-linked UHMWPE pins was readily detected and esti- mated to be 17 6 3 lg per million cycles. The conventional-to- cross-linked ratio of the wear rates was 13.1 6 0.8, in the expected range for these materials. Oxidative degradation dam- age from implantation was negligible; however, a weak depend- ence of wear on implantation dose was observed limiting the number of radioactive tracer atoms that can be introduced. Future applications of this tracer technology may include the analysis of location-specific wear, such as loss of material in the post or backside of a tibial insert.

Wimmer, Markus A. [Rush Uniiv. Medical Center; Laurent, Michael P. [Rush Univ. Medical Center; Dwivedi, Yasha [Rush Univ. Medical Center; Gallardo, Luis A. [Rush Univ. Medical Center; Chipps, K. [Colorado School of Mines, Golden; Blackmon, Jeffery C [Louisiana State University; Kozub, R. L. [Tennessee Technological University; Bardayan, Daniel W [ORNL; Gross, Carl J [ORNL; Stracener, Daniel W [ORNL; Smith, Michael Scott [ORNL; Nesaraja, Caroline D [ORNL; Erikson, Luke [Colorado School of Mines, Golden; Patel, Nidhi [Colorado School of Mines, Golden; Rehm, Karl E. [Argonne National Laboratory (ANL); Ahmad, Irshad [Argonne National Laboratory (ANL); Greene, John P. [Argonne National Laboratory (ANL); Greife, Uwe [Colorado School of Mines, Golden

2013-01-01T23:59:59.000Z

203

129 Iodine: A New Hydrologic Tracer for Aquifer Recharge Conditions Influenced by River Flow Rate and Evapotranspiration  

E-Print Network [OSTI]

County using boron isotopes and general geochemistry, In Lawrence Livermore National Laboratory UCRL-ID-133529 (pp. 44). ? Davisson, M.L., Hudson, G.B., Herndon, R., & Woodside, G. (1999b). Report on isotope tracer investigations in the Forebay... of the Orange County Groundwater Basin: Fiscal years 1996 and 1997, In Lawrence Livermore National Laboratory UCRL-ID- 133531 (pp. 44). ? Dissanayake, C.B. & Chandrajith, R. (1999). Medical geochemistry of tropical environments. Earth-Science Reviews 47, 219...

Schwehr, K. A.; Santschi, P. H.; Moran, J. E.

2003-01-01T23:59:59.000Z

204

Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers  

E-Print Network [OSTI]

coal and biofuel combustion and biomass burning (Khalil andcombustion products ethyne and benzene, and of the biomass/combustion tracer ethyne, the industrial solvent CH 2 Cl 2 , and the two coal/biomass

2009-01-01T23:59:59.000Z

205

Interpretation of Colloid-Homologue Tracer Test 10-03, Including Comparisons to Test 10-01  

SciTech Connect (OSTI)

This presentation covers the interpretations of colloid-homologue tracer test 10-03 conducted at the Grimsel Test Site, Switzerland, in 2010. It also provides a comparison of the interpreted test results with those of tracer test 10-01, which was conducted in the same fracture flow system and using the same tracers than test 10-03, but at a higher extraction flow rate. A method of correcting for apparent uranine degradation in test 10-03 is presented. Conclusions are: (1) Uranine degradation occurred in test 10-03, but not in 10-01; (2) Uranine correction based on apparent degradation rate in injection loop in test 11-02 seems reasonable when applied to data from test 10-03; (3) Colloid breakthrough curves quite similar in the two tests with similar recoveries relative to uranine (after correction); and (4) Much slower apparent desorption of homologues in test 10-03 than in 10-01 (any effect of residual homologues from test 10-01 in test 10-03?).

Reimus, Paul W. [Los Alamos National Laboratory

2012-06-26T23:59:59.000Z

206

Thermal single-well injection-withdrawal tracer tests for determining fracture-matrix heat transfer area  

SciTech Connect (OSTI)

Single-well injection-withdrawal (SWIW) tracer tests involve injection of traced fluid and subsequent tracer recovery from the same well, usually with some quiescent time between the injection and withdrawal periods. SWIW are insensitive to variations in advective processes that arise from formation heterogeneities, because upon withdrawal, fluid parcels tend to retrace the paths taken during injection. However, SWIW are sensitive to diffusive processes, such as diffusive exchange of conservative or reactive solutes between fractures and rock matrix. This paper focuses on SWIW tests in which temperature itself is used as a tracer. Numerical simulations demonstrate the sensitivity of temperature returns to fracture-matrix interaction. We consider thermal SWIW response to the two primary reservoir improvements targeted with stimulation, (1) making additional fractures accessible to injected fluids, and (2) increasing the aperture and permeability of pre-existing fractures. It is found that temperature returns in SWIW tests are insensitive to (2), while providing a strong signal of more rapid temperature recovery during the withdrawal phase for (1).

Pruess, K.; Doughty, C.

2010-01-15T23:59:59.000Z

207

Tracer transport in the Greenland Ice Sheet: constraints on ice cores and glacial history  

Science Journals Connector (OSTI)

The climate history and dynamics of the Greenland Ice Sheet are studied using a coupled model of the depositional provenance and transport of glacier ice, allowing simultaneous prediction of the detailed isotopic stratigraphy of ice cores at all the major Greenland sites. Adopting a novel method for reconstructing the age–depth relationship, we greatly improve the accuracy of semi-Lagrangian tracer tracking schemes and can readily incorporate an age-dependent ice rheology. The larger aim of our study is to impose new constraints on the glacial history of the Greenland Ice Sheet. Leading sources of uncertainty in the climate and dynamic history are encapsulated in a small number of parameters: the temperature and elevation isotopic sensitivities, the glacial–interglacial precipitation contrast and the effective viscosity of ice in the flow law. Comparing predicted and observed ice layering at ice core sites, we establish plausible ranges for the key model parameters, identify climate and dynamic histories that are mutually consistent and recover the past depositional elevation of ice cores to ease interpretation of their climatic records. With the coupled three-dimensional model of ice dynamics and provenance transport we propose a method to place all the ice core records on a common time scale and use discrepancies to adjust the reconstructed climate history. Analysis of simulated GRIP ice layering and borehole temperature profiles confirms that the GRIP record is sensitive to the dynamic as well as to the climatic history, but not enough to strongly limit speculation on the state of the Greenland Ice Sheet during the Eemian. In contrast, our study indicates that the Dye 3 and Camp Century ice cores are extremely sensitive to ice dynamics and greatly constrain Eemian ice sheet reconstructions. We suggest that the maximum Eemian sea-level contribution of the ice sheet was in the range of 3.5–4.5 m.

Nicolas Lhomme; Garry K.C. Clarke; Shawn J. Marshall

2005-01-01T23:59:59.000Z

208

Modeling The GRB Host Galaxy Mass Distribution: Are GRBs Unbiased Tracers of Star Formation?  

SciTech Connect (OSTI)

We model the mass distribution of long gamma-ray burst (GRB) host galaxies given recent results suggesting that GRBs occur in low metallicity environments. By utilizing measurements of the redshift evolution of the mass-metallicity (M-Z) relationship for galaxies, along with a sharp host metallicity cut-off suggested by Modjaz and collaborators, we estimate an upper limit on the stellar mass of a galaxy that can efficiently produce a GRB as a function of redshift. By employing consistent abundance indicators, we find that sub-solar metallicity cut-offs effectively limit GRBs to low stellar mass spirals and dwarf galaxies at low redshift. At higher redshifts, as the average metallicity of galaxies in the Universe falls, the mass range of galaxies capable of hosting a GRB broadens, with an upper bound approaching the mass of even the largest spiral galaxies. We compare these predicted limits to the growing number of published GRB host masses and find that extremely low metallicity cut-offs of 0.1 to 0.5 Z{sub {circle_dot}} are effectively ruled out by a large number of intermediate mass galaxies at low redshift. A mass function that includes a smooth decrease in the efficiency of producing GRBs in galaxies of metallicity above 12+log(O/H){sub KK04} = 8.7 can, however, accommodate a majority of the measured host galaxy masses. We find that at z {approx} 1, the peak in the observed GRB host mass distribution is inconsistent with the expected peak in the mass of galaxies harboring most of the star formation. This suggests that GRBs are metallicity biased tracers of star formation at low and intermediate redshifts, although our model predicts that this bias should disappear at higher redshifts due to the evolving metallicity content of the universe.

Kocevski, Daniel; /KIPAC, Menlo Park; West, Andrew A.; /UC, Berkeley, Astron. Dept. /MIT, MKI; Modjaz, Maryam; /UC, Berkeley, Astron. Dept.

2009-08-03T23:59:59.000Z

209

Core follow calculation with the nTRACER numerical reactor and verification using power reactor measurement data  

SciTech Connect (OSTI)

The nTRACER direct whole core transport code employing the planar MOC solution based 3-D calculation method, the subgroup method for resonance treatment, the Krylov matrix exponential method for depletion, and a subchannel thermal/hydraulic calculation solver was developed for practical high-fidelity simulation of power reactors. Its accuracy and performance is verified by comparing with the measurement data obtained for three pressurized water reactor cores. It is demonstrated that accurate and detailed multi-physic simulation of power reactors is practically realizable without any prior calculations or adjustments. (authors)

Jung, Y. S.; Joo, H. G. [Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul (Korea, Republic of); Yoon, J. I. [KEPCO Nuclear Fuel, 1047 Daedukdae-ro, Yuseong-gu, Daejeon (Korea, Republic of)

2013-07-01T23:59:59.000Z

210

Quantifying biomineralization of zinc in the Rio Naracauli (Sardinia, Italy), using a tracer injection and synoptic sampling  

Science Journals Connector (OSTI)

Abstract Streams draining mined areas throughout the world commonly have high concentrations of Zn. Because Zn is not easily removed from stream water and because it can be toxic to aquatic organisms, its presence is a persistent problem. The discovery of biomineralization of Zn-bearing solids in the mine drainage of Rio Naracauli, in Sardinia, Italy, provides insights into strategies for removing Zn and improving water quality in streams affected by mine drainage. Until now, the transport and attenuation of Zn has not been quantified in this stream setting. A continuous tracer injection experiment was conducted to quantify the biomineralization process and to identify the loading of constituents that causes a change from precipitation of hydrozincite [Zn5(CO3)2(OH)6] in the upstream reach to precipitation of a Zn-silicate phase downstream. Based on the mass-load calculations derived from the tracer experiment, about 1.2 kg/day of Zn is sequestered in hydrozincite. This biomineralization represents nearly 90% removal of Zn. Other elements such as Pb and Cd also are sequestered, either in the hydrozincite, or in a separate phase that forms simultaneously. In the lower 600 m of the stream, where the Zn-silicate forms, as much as 0.7 kg/day Zn are sequestered in this solid, but additions of Zn to the stream from groundwater discharge lead to an overall increase in load in that portion of the Rio Naracauli.

G. De Giudici; R.B. Wanty; F. Podda; B.A. Kimball; P.L. Verplanck; P. Lattanzi; R. Cidu; D. Medas

2014-01-01T23:59:59.000Z

211

Experimental investigation of direct injection charge cooling in optical GDI engine using tracer-based PLIF technique  

Science Journals Connector (OSTI)

Abstract Investigation of direct injection charge cooling effects is indispensable in design and development of new combustion systems for Gasoline Direct Injection (GDI) engines. The charge cooling can be utilized to increase engine volumetric efficiency or compression ratio. It can be employed to suppress pre-ignition of highly boosted downsized engines or knocking combustion of naturally aspirated engines. The main purpose of this work was to develop an experimental setup for quantitative measurements of charge cooling during fuel injection process inside the combustion chamber of a GDI engine with optical access. For this purpose a tracer-based two-line Planar Laser Induced Fluorescence (PLIF) technique was implemented for the measurements. A specially designed Constant Volume Chamber (CVC) was utilized for quasi in situ calibration measurement so in-cylinder charge temperature measurements can be achieved independent of the photophysical model of dopant tracer. The thermometry technique was evaluated by measurements of average in-cylinder charge temperature during compression stroke for both motoring and firing cycles and comparing the results with temperature values calculated from in-cylinder pressure data assuming a polytropic compression. The PLIF technique was successfully utilized to quantify the extend of global temperature decrease as a result of direct injection charge cooling of two injection timings of 90 and 250 °CA ATDC and two injection quantities of 10 and 30 mg/cycle. Test results demonstrated the capability of the two-line PLIF thermometry technique in quantitative study of direct injection charge cooling effects.

Mohammadreza Anbari Attar; Mohammad Reza Herfatmanesh; Hua Zhao; Alasdair Cairns

2014-01-01T23:59:59.000Z

212

The Proton Transfer Reaction-Mass Spectrometer for Atmospheric Chemistry Tracers of Diesel Exhaust Emissions and Measurements of Trace gas and Aerosol properties.  

E-Print Network [OSTI]

The Proton Transfer Reaction-Mass Spectrometer for Atmospheric Chemistry Tracers of Diesel Exhaust exhaust experiment It has previously been difficult to identify the emissions of diesel exhaust until reactive with organic compounds such as alkanes which are present in diesel exhaust emissions. The reaction

Collins, Gary S.

213

Strontium isotope geochemistry of alluvial groundwater: a tracer for groundwater resources characterisation Hydrology and Earth System Sciences, 8(5), 959972 (2004) EGU  

E-Print Network [OSTI]

Strontium isotope geochemistry of alluvial groundwater: a tracer for groundwater resources characterisation 959 Hydrology and Earth System Sciences, 8(5), 959972 (2004) © EGU Strontium isotope geochemistry for corresponding author : p.negrel@brgm.fr Abstract This study presents strontium isotope and major ion data

Paris-Sud XI, Université de

214

Project EARTH-13-GMH2: U-series nuclides as tracers of modern ocean processes Supervisors: Prof. Gideon Henderson and Dr. Alex Thomas  

E-Print Network [OSTI]

flow of Atlantic deep water during the Last Glacial Maximum', Nature. Vol. 468, pp. 84 #12;Project EARTH-13-GMH2: U-series nuclides as tracers of modern ocean processes Supervisors: Prof provides information about the removal rate of material from the water-column and, for the former, about

Henderson, Gideon

215

Ready, Set . . . Get Prepped for Monday's Launch of the 'America...  

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

of Public Affairs The 'America's Next Top Energy Innovator' Challenge will begin on May 2. That means that starting on Monday, and continuing through December 15, entrepreneurs...

216

Practical Operation of Prep-Scale Gas Chromatographic Units  

Science Journals Connector (OSTI)

......compounds are needed at a high degree of purity...and the trapping efficiency. These problems...wrong idea that a high degree of resolu...gases are large and venting out even nitrogen...Oxygen free ultra high purity - 5 6 16 23...bot- tom of the furnace is only 2 C, because......

B. Roz; R. Bonmati; G. Hagenbach; P. Valentin; G. Guiochon

1976-08-01T23:59:59.000Z

217

Practical Operation of Prep-Scale Gas Chromatographic Units  

Science Journals Connector (OSTI)

......given in Table I. The cost of a recycling unit is...nitrogen is used as carrier gas. For narrower columns it depends on the length of production cycles. Once a recycling unit is used, the carrier gas cost becomes negligible, and......

B. Roz; R. Bonmati; G. Hagenbach; P. Valentin; G. Guiochon

1976-08-01T23:59:59.000Z

218

Application of a NAPL partitioning interwell tracer test (PITT) to support DNAPL remediation at the Sandia National Laboratories/New Mexico chemical waste landfill  

SciTech Connect (OSTI)

Chlorinated solvents as dense non-aqueous phase liquid (DNAPL) are present at a large number of hazardous waste sites across the U.S. and world. DNAPL is difficult to detect in the subsurface, much less characterize to any degree of accuracy. Without proper site characterization, remedial decisions are often difficult to make and technically effective, cost-efficient remediations are even more difficult to obtain. A new non-aqueous phase liquid (NAPL) characterization technology that is superior to conventional technologies has been developed and applied at full-scale. This technology, referred to as the Partitioning Interwell Tracer Test (PITT), has been adopted from oil-field practices and tailored to environmental application in the vadose and saturated zones. A PITT has been applied for the first time at full-scale to characterize DNAPL in the vadose zone. The PITT was applied in December 1995 beneath two side-by-side organic disposal pits at Sandia National Laboratories/New Mexico (SNL/NM) RCRA Interim Status Chemical Waste Landfill (CWL), located in Albuquerque, New Mexico. DNAPL, consisting of a mixture of chlorinated solvents, aromatic hydrocarbons, and PCE oils, is known to exist in at least one of the two buried pits. The vadose zone PITT was conducted by injecting a slug of non-partitioning and NAPL-partitioning tracers into and through a zone of interest under a controlled forced gradient. The forced gradient was created by a balanced extraction of soil gas at a location 55 feet from the injector. The extracted gas stream was sampled over time to define tracer break-through curves. Soil gas sampling ports from multilevel monitoring installations were sampled to define break-through curves at specific locations and depths. Analytical instrumentation such as gas chromatographs and a photoacoustical analyzers operated autonomously, were used for tracer detection.

Studer, J.E. [INTERA Inc., Albuquerque, NM (United States); Mariner, P.; Jin, M. [INTERA Inc., Austin, TX (United States)] [and others

1996-05-01T23:59:59.000Z

219

An Electrical Analogue for Analysis of Tracer Distribution Kinetics in Biological Systems Author(s): J. R. MacDonald, E. G. Perry, L. L. Madison, D. W. Seldin  

E-Print Network [OSTI]

(s): J. R. MacDonald, E. G. Perry, L. L. Madison, D. W. Seldin Source: Radiation Research, Vol. 6, No. 5 of Tracer Distribution Kinetics in Biological Systems1 J. R. MACDONALD AND E. G. PERRY Research Division

Macdonald, James Ross

220

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shocks. Thus we predict that the abundance of H2O and other known outflow tracers can be used to trace the history of shock activity in molecular gas. For gas-grain models we find that the abundance of water-ice on grain surfaces can be quite large and is comparable to that observed in molecular clouds. This offers a possible alternative method to create water mantles without resorting to grain surface chemistry: gas heating and chemical modification due to a C-type shock and subsequent depletion of the gas-phase species onto grain mantles.

Edwin A. Bergin; Gary J. Melnick; David A. Neufeld

1998-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Brush potential curve tracer  

DOE Patents [OSTI]

A device for analyzing commutating characteristics of a motor or generator includes a holder for supporting a plurality of probes adjacent a brush of the motor or generator. Measurements of electrical current characteristics in each of the probes provides information useful in analyzing operation of the machine. Methods for employing a device in accordance with the invention are also disclosed.

Finch, Hilvan A. (Schenectady, NY)

1987-01-01T23:59:59.000Z

222

Brush potential curve tracer  

DOE Patents [OSTI]

A device for analyzing commutating characteristics of a motor or generator includes a holder for supporting a plurality of probes adjacent a brush of the motor or generator. Measurements of electrical current characteristics of the probes provides information useful in analyzing operation of the machine. Methods for employing a device in accordance with the invention are also disclosed.

Finch, H.A.

1985-06-21T23:59:59.000Z

223

Identification of small-scale low and high permeability layers using single well forced-gradient tracer tests: Fluorescent dye imaging and modelling at the laboratory-scale  

Science Journals Connector (OSTI)

Abstract Heterogeneity in aquifer permeability, which creates paths of varying mass flux and spatially complex contaminant plumes, can complicate the interpretation of contaminant fate and transport in groundwater. Identifying the location of high mass flux paths is critical for the reliable estimation of solute transport parameters and design of groundwater remediation schemes. Dipole flow tracer tests (DFTTs) and push-pull tests (PPTs) are single well forced-gradient tests which have been used at field-scale to estimate aquifer hydraulic and transport properties. In this study, the potential for \\{PPTs\\} and \\{DFTTs\\} to resolve the location of layered high- and low-permeability layers in granular porous media was investigated with a pseudo 2-D bench-scale aquifer model. Finite element fate and transport modelling was also undertaken to identify appropriate set-ups for in situ tests to determine the type, magnitude, location and extent of such layered permeability contrasts at the field-scale. The characteristics of flow patterns created during experiments were evaluated using fluorescent dye imaging and compared with the breakthrough behaviour of an inorganic conservative tracer. The experimental results show that tracer breakthrough during \\{PPTs\\} is not sensitive to minor permeability contrasts for conditions where there is no hydraulic gradient. In contrast, \\{DFTTs\\} are sensitive to the type and location of permeability contrasts in the host media and could potentially be used to establish the presence and location of high or low mass flux paths. Numerical modelling shows that the tracer peak breakthrough time and concentration in a DFTT is sensitive to the magnitude of the permeability contrast (defined as the permeability of the layer over the permeability of the bulk media) between values of 0.01–20. \\{DFTTs\\} are shown to be more sensitive to deducing variations in the contrast, location and size of aquifer layered permeability contrasts when a shorter central packer is used. However, larger packer sizes are more likely to be practical for field-scale applications, with fewer tests required to characterise a given aquifer section. The sensitivity of \\{DFTTs\\} to identify layered permeability contrasts was not affected by test flow rate.

Gareth L. Barns; Steven F. Thornton; Ryan D. Wilson

2015-01-01T23:59:59.000Z

224

Spatially resolved physical conditions of molecular gas and potential star formation tracers in M83, revealed by the Herschel SPIRE FTS  

E-Print Network [OSTI]

Since the launch of the Herschel Space Observatory, our understanding about the photo-dissociation regions (PDR) has taken a step forward. In the bandwidth of the Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REceiver (SPIRE) on board Herschel, ten CO rotational transitions, including J=4-3 to J=13-12, and three fine structure lines, including [CI] 609, [CI] 370, and [NII] 250 micron, are covered. In this paper, I present our findings from the FTS observations at the nuclear region of M83, based on the spatially resolved physical parameters derived from the CO spectral line energy distribution (SLED) map and the comparisons with the dust properties and star-formation tracers. I will discuss (1) the potential of using [NII] 250 and [CI] 370 micron as star-formation tracers; (2) the reliability of tracing molecular gas with CO; (3) the excitation mechanisms of warm CO; (4) the possibility of studying stellar feedback by tracing the thermal pressure of molecular gas in the nuclear ...

Wu, Ronin; Galliano, Frédéric; Wilson, Christine D; Kamenetzky, Julia; Lee, Min-Young; Schirm, Maximilien; Hony, Sacha; Lebouteiller, Vianney; Spinoglio, Luigi; Cormier, Diane; Glenn, Jason; Maloney, Philip R; Pereira-Santaella, Miguel; Rémy-Ruyer, Aurélie; Baes, Martin; Boselli, Alexandro; Bournaud, Frédéric; De Looze, Ilse; Hughes, Thomas M; Panuzzo, Pasquale; Rangwala, Naseem

2014-01-01T23:59:59.000Z

225

Site Office Safety System Oversight Staffing Plan - Blank  

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

Site Office Safety System Oversight Staffing Plan" Site Office Safety System Oversight Staffing Plan" "Date" "ACTIVITIES","Days for Activity in each Fiscal Year",,,,,,"Notes" ,"FY09","FY10","FY11","FY12","FY13","FY14" "Program Tasks" "Total Task Days",0,0,0,0,0,0,"Number of days required for activities that need to be completed regardless of number of staff" "Individual Tasks" "Qualification Training" "Continuing Training" "Collateral Duties" "Administrative" "Leave, Holidays" "Total Individual Days",0,0,0,0,0,0,"Number of days required for activities that need to be completed by each individual"

226

LEAVE THIS SPACE BLANK CN FIRST PAGE ONLY.  

E-Print Network [OSTI]

Leader-Heat Pump RED, Oak Ridge National Laboratory, Oak Ridge, Tennessee F. A. Creswick, member ASHRAE, Program Manager-Heat Pump R&D Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee S. K. Fischer, Research Associate, Oak Ridge National Laboratory, Oak Ridge, Tennessee W. L. Jackson, Computer

Oak Ridge National Laboratory

227

" target="_blank">The University of Tokyo Site Policy  

E-Print Network [OSTI]

of Japan's largest ballparks, is SPring-8, a synchrotron radiation facility managed by RIKEN and containing) produced synchrotron light in Japan. The accelerator ring was used for synchrotron radiation experiments radiation opens up the nanoworld 2012/11/21 Research on synchrotron light has enabled researchers to see

Miyashita, Yasushi

228

(page intentionally blank) CENTRE FOR THE STUDY OF BIOLOGICAL DIVERSITY  

E-Print Network [OSTI]

in developing Kaieteur National Park, Guyana for ecotourism and conservation by Carol L. Kelloff edited Institution. The use of biodiversity data in developing Kaieteur National Park, Guyana for ecotourism

Mathis, Wayne N.

229

TRADOC Pam 525-3-1 (This page intentionally blank.)  

E-Print Network [OSTI]

forces conduct operations as part of the joint force to deter conflict, prevail in war, and succeed the framework of full-spectrum operations: 1) Army forces conduct combined arms maneuver to gain physical organized, trained, and equipped for prompt and sustained operations on land. As one of the critical

US Army Corps of Engineers

230

Foundations of Mind This page intentionally left blank  

E-Print Network [OSTI]

Auckland Cape Town Dar es Salaam Hong Kong Karachi Kuala Lumpur Madrid Melbourne Mexico City Nairobi New

Pylyshyn, Zenon

231

This page is intentionally blank Table of Contents  

E-Print Network [OSTI]

Pont Process Management Review 27 Section 6. Oversight and Safeguard Mechanisms 31 NECDF Basis of OperationPont and the state of New Jersey are consistently met. Oversight and safeguard mechanisms, including management

232

High Speed Joining of Dissimilar Alloy Aluminum Tailor Welded Blanks  

Broader source: Energy.gov [DOE]

2013 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

233

This Page Left Blank Intentionally Informing Rangeland Stewardship With  

E-Print Network [OSTI]

Learned From Yolo County, California1 Vance Russell,2 Chris Rose,2 and Miles DaPrato2 Abstract, and Michigan State University conducted multi-disciplinary studies across a range of habitats in Yolo County watershed in Yolo County, California, is an important contributor to the health of the Bay-Delta ecosystem

Standiford, Richard B.

234

The bias of the submillimetre galaxy population: SMGs are poor tracers of the most massive structures in the z ~ 2 Universe  

E-Print Network [OSTI]

It is often claimed that overdensities of (or even individual bright) submillimetre-selected galaxies (SMGs) trace the assembly of the most-massive dark matter structures in the Universe. We test this claim by performing a counts-in-cells analysis of mock SMG catalogues derived from the Bolshoi cosmological simulation to investigate how well SMG associations trace the underlying dark matter structure. We find that SMGs exhibit a relatively complex bias: some regions of high SMG overdensity are underdense in terms of dark matter mass, and some regions of high dark matter overdensity contain no SMGs. Because of their rarity, Poisson noise causes scatter in the SMG overdensity at fixed dark matter overdensity. Consequently, rich associations of less-luminous, more-abundant galaxies (i.e. Lyman-break galaxy analogues) trace the highest dark matter overdensities much better than SMGs. Even on average, SMG associations are relatively poor tracers of the most significant dark matter overdensities because of `downsiz...

Miller, Tim B; Chapman, Scott C; Behroozi, Peter S

2015-01-01T23:59:59.000Z

235

A multiple-tracer approach to understanding regional groundwater flow in the Snake Valley area of the eastern Great Basin, USA  

Science Journals Connector (OSTI)

Abstract Groundwater in Snake Valley and surrounding basins in the eastern Great Basin province of the western United States is being targeted for large-scale groundwater extraction and export. Concern about declining groundwater levels and spring flows in western Utah as a result of the proposed groundwater withdrawals has led to efforts that have improved the understanding of this regional groundwater flow system. In this study, environmental tracers (?2H, ?18O, 3H, 14C, 3He, 4He, 20Ne, 40Ar, 84Kr, and 129Xe) and major ions from 142 sites were evaluated to investigate groundwater recharge and flow-path characteristics. With few exceptions, ?2H and ?18O show that most valley groundwater has similar ratios to mountain springs, indicating recharge is dominated by relatively high-altitude precipitation. The spatial distribution of 3H, terrigenic helium (4Heterr), and 3H/3He ages shows that modern groundwater (temperatures (NGTs) are generally 1–11 °C in Snake and southern Spring Valleys and >11 °C to the east of Snake Valley and indicate a hydraulic discontinuity between Snake and Tule Valleys across the northern Confusion Range. The combination of \\{NGTs\\} and 4Heterr shows that the majority of Snake Valley groundwater discharges as springs, evapotranspiration, and well withdrawals within Snake Valley rather than continuing northeastward to discharge at either Fish Springs or the Great Salt Lake Playa. The refined understanding of groundwater recharge and flow paths acquired from this multi-tracer investigation has broad implications for interbasin subsurface flow estimates and future groundwater development.

Philip M. Gardner; Victor M. Heilweil

2014-01-01T23:59:59.000Z

236

A semi-analytical model for heat and mass transfer in geothermal reservoirs to estimate fracture surface-are-to-volume ratios and thermal breakthrough using thermally-decaying and diffusing tracers  

SciTech Connect (OSTI)

A semi-analytical model was developed to conduct rapid scoping calculations of responses of thermally degrading and diffusing tracers in multi-well tracer tests in enhanced geothermal systems (EGS). The model is based on an existing Laplace transform inversion model for solute transport in dual-porosity media. The heat- and mass-transfer calculations are decoupled and conducted sequentially, taking advantage of the fact that heat transfer between fractures and the rock matrix is much more rapid than mass transfer and therefore mass transfer will effectively occur in a locally isothermal system (although the system will be nonisothermal along fracture flow pathways, which is accounted for by discretizing the flow pathways into multiple segments that have different temperature histories). The model takes advantage of the analogies between heat and mass transfer, solving the same governing equations with k{sub m}/({rho}C{sub p}){sub w} being substituted for {phi}D{sub m} in the equation for fracture transport and k{sub m}/({rho}C{sub p}){sub m} being subsituted for D{sub m} in the equation for matrix transport; where k = thermal conductivity (cal/cm-s-K), {rho} = density (g/cm{sup 3}), C{sub p} = heat capacity (at constant pressure) (cal/g-K), {phi} = matrix porosity, and D = tracer diffusion coefficient (cm{sup 2}/s), with the subscripts w and m referring to water and matrix, respectively. A significant advantage of the model is that it executes in a fraction of second on a single-CPU personal computer, making it very amenable for parameter estimation algorithms that involve repeated runs to find global minima. The combined thermal-mass transport model was used to evaluate the ability to estimate when thermal breakthrough would occur in a multi-well EGS configuration using thermally degrading tracers. Calculations were conducted to evaluate the range of values of Arrhenius parameters, A and E{sub {alpha}} (pre-exponential factor, 1/s, and activation energy, cal/mol) required to obtain interpretable responses of thermally-degrading tracers that decay according to the rate constant k{sub d} = Ae{sup -E{sub {alpha}}/RT}, where k{sub d} = decay rate constant (1/s), R = ideal gas constant (1.987 cal/mol-K), and T = absolute temperature (K). It is shown that there are relatively narrow ranges of A and E{sub {alpha}} that will result in readily interpretable tracer responses for any given combination of ambient reservoir temperature and working fluid residence time in a reservoir. The combined model was also used to simulate the responses of conservative tracers with different diffusion coefficients as a way of estimating fracture surface-area-to-volume ratios (SA/V) in multi-well EGS systems. This method takes advantage of the fact that the differences in breakthrough curves of tracers with different matrix diffusion coefficients are a function of SA/V. The model accounts for differences in diffusion coefficients as a function of temperature so that tracer responses obtained at different times can be used to obtain consistent estimates of SA/V as the reservoir cools down. Some single-well applications of this approach are simulated with a numerical model to demonstrate the potential to evaluate the effectiveness of EGS stimulations before a second well is drilled.

Reimus, Paul W [Los Alamos National Laboratory

2010-12-08T23:59:59.000Z

237

Steady-state and transient modeling of tracer and nutrient distributions in the global ocean. Progress report, August 1, 1993--July 31, 1994  

SciTech Connect (OSTI)

We have completed the studies using the inorganic carbon cycle in the zonally averaged ocean circulation model to calculate anthropogenic uptake of CO, and bomb radiocarbon. While our results are in broad agreement with previous studies, we have learned that horizontal mixing processes due to gyre circulation are important for transient tracer experiments over a few decades. These findings are in press. Using the inorganic carbon cycle model we have started to look at the distributions of {delta}{sup 13}C in the ocean. The model is able to reproduce faithfully the air-sea fractionation of {delta}{sup 13}C. The effect of changing sea surface temperature in the middle and low latitudes of the world ocean on pCO{sub 2{sup atm}} is studied in this model and compared to the organic carbon cycle model of the Hamburg group. We find significant differences in sensitivity and are in the process of investigating possible reasons. Incorporation of the organic component is still ongoing. In the present version the surface concentrations of phosphate are still too high indicating strong upwelling.

Stocker, T.F.; Broecker, W.S.

1994-04-30T23:59:59.000Z

238

Assimilation of observations of radiation level into an atmospheric transport model: A case study with the particle filter and the ETEX tracer dataset  

Science Journals Connector (OSTI)

Atmospheric transport models and observations from monitoring networks are commonly used aids for forecasting spatial distribution of contamination in case of a radiological incident. In this study, we assessed the particle filter data-assimilation technique as a tool for ensemble forecasting the spread of radioactivity. We used measurements from the ETEX-1 tracer experiment and model results from the NPK-Puff atmospheric dispersion model. We showed that assimilation of observations improves the ensemble forecast compared to runs without data assimilation. The improvement is most prominent for nowcasting: the mean squared error was reduced by a factor of 7. For forecasting, the improvement of the mean squared error resulting from assimilation of observations was found to dissipate within a few hours. We ranked absolute model values and observations and calculated the mean squared error of the ranked values. This measure of the correctness of the pattern of high and low values showed an improvement for forecasting up to 48 h. We conclude that the particle filter is an effective tool in better modeling the spread of radioactivity following a release.

Paul H. Hiemstra; Derek Karssenberg; Arjan van Dijk

2011-01-01T23:59:59.000Z

239

Optical and X-ray clusters as tracers of the supercluster-void network. III Distribution of Abell and APM clusters  

E-Print Network [OSTI]

We present a comparison of Abell and APM clusters of galaxies as tracers of the large scale structure of the Universe. We investigate selection functions of both cluster catalogs. We show that the supercluster-void network can be traced with both cluster samples; the network has a well-defined period of ~120 h^{-1} Mpc. We calculate the correlation function and the power spectrum for Abell and APM cluster samples. The APM cluster sample with measured redshifts covers a small volume which contains only a few very rich superclusters that surround one void and have exceptionally large mutual separations. Due to this property the maximum of the power spectrum of APM clusters with measured velocities is shifted to larger scales than the corresponding feature in the power spectrum of Abell clusters. We conclude that the APM sample is not representative for the large-scale structure as a whole due to the small space coverage. We present a catalog of superclusters of galaxies, based on APM clusters up to a redshift z_{lim}=0.13.

M. Einasto; J. Einasto; E. Tago; H. Andernach; G. B. Dalton; V. M"uller

2000-12-29T23:59:59.000Z

240

Thermo Tracer Infrared Thermal Imager  

E-Print Network [OSTI]

the product. NEC San-ei Instruments, Ltd. 1-25-12, Akebono-cho, Tachikawa-shi, Tokyo 190-8537, Japan Phone

Walker, D. Greg

Note: This page contains sample records for the topic "tracer prep blanks" 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

Solar wind energy transfer regions inside the dayside magnetopause: Accelerated heavy ions as tracers for MHD-processes in the dayside boundary layer  

Science Journals Connector (OSTI)

Plasma and magnetic field data from PROGNOZ-7 have revealed that solar wind (magnetosheath) plasma elements may penetrate the dayside magnetopause surface and form high density regions with enhanced cross-field flow in the boundary layer. The injected magnetosheath plasma is observed to have an excess drift velocity as compared to the local boundary layer plasma, comprising both “cold” plasma of terrestrial origin and a hot ring current component. A differential drift between two plasma components can be understood in terms of a momentum transfer process driven by an injected magnetosheath plasma population. The braking action of the injected plasma may be described as a dynamo process where particle kinetic energy is transferred into electromagnetic energy (electric field). The generated electric field will force the local plasma to ?×B-drift, and the dynamo region therefore also constitutes an accelerator region for the local plasma. Whenever energy is dissipated from the energy transfer process (a net current is flowing through a load), there will also be a difference between the induced electric field and the v×B term of the generator plasma. Thus, the local plasma will drift more slowly than the injected generator plasma. We will present observations showing that a relation between the momentum transferred, the injected plasma and the momentum taken up by the local plasma exists. For instance, if the local plasma density is sufficiently high, the differential drift velocity of the injected and local plasma will be small. A large fraction of the excess momentum is then transferred to the local plasma. Conversely, a low local plasma density results in a high velocity difference and a low fraction of local momentum transfer. In our study cases the “cold” plasma component was frequently found to dominate the local magnetospheric plasma density in the boundary layer. Accordingly, this component may have the largest influence on the local momentum transfer process. We will demonstrate that this also seems to be the case. Moreover we show that the accelerated “cold” plasma component may be used as a tracer element reflecting both the momentum and energy transfer and the penetration process in the dayside boundary layer. The high He+ percentage of the accelerated “cold” plasma indicates a plasmaspheric origin. Considering the quite high densities of energetic He+ found in the boundary layer, the overall low abundance of He+ (as compared to e.g. O+) found in the plasma sheet and outer ring current evidently reduces the importance of the dayside boundary layer as a plasma source in the large scale magnetospheric circulation system.

R. Lundin; E.M. Dubinin

1985-01-01T23:59:59.000Z

242

FINAL REPORT: EDDY-COVARIANCE FLUX TOWER AND TRACER TECHNOLOGY SUPPORT FOR THE UNIVERSITY OF GEORGIA PROPOSAL: FROM TOWER TO PIXEL: INTEGRATION OF PATCH-SIZE NEE USING EXPERIMENTAL MODELING FOOTPRINT ANALYSIS.  

SciTech Connect (OSTI)

Brookhaven National Laboratory has been funded since October of 2000 to provide assistance to the University of Georgia in conducting footprint analyses of individual towers based on meteorology and trace gas measurements. Brookhaven researchers conducted air flow measurements using perfluorocarbon tracers and meteorological instrumentation for three experimental campaigns at an AmeriFlux research site maintained by Dr. Monique Leclerc near Gainesville, FL. In addition, BNL provided assistance with remote data collection and distribution from remote field sites operated by Dr. John Hom of the US Forest Service in the Pine Barrens of New Jersey and at FACE research sites in North Carolina and Wisconsin.

LEWIN,K.F.; NAGY, J.; WATSON, T.B.

2007-09-01T23:59:59.000Z

243

AOCE Petition Guidelines **These guidelines apply to the following Continuing Education Programs: Lifelong Learning, Test Prep,  

E-Print Network [OSTI]

AOCE Petition Guidelines **These guidelines apply to the following Continuing Education Programs-9359 Fax: 801-585-6490 Email: register@aoce.utah.edu 4. Please allow up to 4 weeks for the petition Drive 1185 Annex, Salt Lake City, UT 84112-9359 Fax: 801-585-6490 Email: register@aoce.utah.edu 5

Capecchi, Mario R.

244

Microsoft Word - Andrews_SREL-CV-Nov-2013-no-in-prep_no-refs...  

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

andrews@srel.edu November 2013 EDUCATION Ph.D. Ecology - University of Georgia 2010 Advisor: J Whitfield Gibbons M.S. Conservation Ecology and Sustainable Development -...

245

Sandia National Laboratories: One-Pot-to-Prep Biomass for Biofuels  

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

and Exhibition (EU PVSC) EC Top Publications Reference Model 5 (RM5): Oscillating Surge Wave Energy Converter Experimental Wave Tank Test for Reference Model 3 Floating- Point...

246

CSF Extract Prep for Spindle Assembly Claire Walczak 11/95  

E-Print Network [OSTI]

Stock Buffers: 20X XB Salts: 2 M KCl 20 mM MgCl2 2 mM CaCl2 store at 4 deg C. 2 M Sucrose: SterileM EDTA 100 mM NaCl 2 mM KCl 1 mM MgCl2 2 mM CaCl2 make 2 l- store at RT. XB: 10 mM HEPES, pH 7.7 1 mM MgCl2 0.1 mM CaCl2 100 mM KCl #12;50 mM sucrose make 250 ml- make fresh. CSF-XB: 10 mM HEPES, pH 7.7 2 m

Mitchison, Tim

247

Bureau of Land Management - Examples of Non-LUP Prep Plan or...  

Open Energy Info (EERE)

LandManagement-ExamplesofNon-LUPPrepPlanorEISPrepPlan&oldid793329" Categories: References Geothermal References Solar References Utilities References Bulk Transmission...

248

PREP Program: High school urban engineering technical progress report, Summer 1993  

SciTech Connect (OSTI)

The Urban Engineering Program at the New Jersey Institute of Technology which as its primary objective is to introduce the students to the excitement of science and engineering as potential career opportunities, and to encourage the youngsters to adequately prepare in high school and in college for such an attainable endeavor. Through the course work, workshops, projects, guest speakers, and laboratory experiences, the students are not only introduced to the problems in urban areas, but also are introduced to the tools and analysis available to solve such problems.

Not Available

1993-09-01T23:59:59.000Z

249

Synthesis and Preclinical Evaluation of 2-(2-Furanyl)-7-[2-[4-[4-(2-[11C]methoxyethoxy)phenyl]-1-piperazinyl]ethyl]7H-pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine-5-amine ([11C]Preladenant) as a PET Tracer for the Imaging of Cerebral Adenosine A2A Receptors  

Science Journals Connector (OSTI)

Regional brain uptake of [11C]-3 was consistent with known A2ARs distribution, with highest uptake in striatum. ... The results indicate that [11C]-3 has favorable brain kinetics and exhibits suitable characteristics as an A2AR PET tracer. ...

Xiaoyun Zhou; Shivashankar Khanapur; Anja P. Huizing; Rolf Zijlma; Marianne Schepers; Rudi A. J. O. Dierckx; Aren van Waarde; Erik F. J. de Vries; Philip H. Elsinga

2014-10-03T23:59:59.000Z

250

June 2014 | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

at PREP ribbon-cutting Under Secretary Klotz delivered remarks at the Pantex Renewable Energy Project (PREP) ribbon-cutting this week. PREP establishes the largest...

251

This page intentionally left blank. `CALLS CONSIDERED HARMFUL' AND OTHER OBSERVATIONS  

E-Print Network [OSTI]

@research.att.com Abstract. The software application domain of customer-oriented telephony is worth the attention approaches. 1. Introduction In the evolution of formal methods for software engineering, the time has come to develop formal methods for particular application domains [10,24]. This paper concerns the domain

Greenberg, Albert

252

Immunization Consent for Persons Under 18 (please fill in blanks neatly)  

E-Print Network [OSTI]

. Hoarseness; sore, red or itchy eyes; cough, fever, aches. PNEUMONIA VACCINE ADVERSE REACTIONS: redness

Singh, Jaswinder Pal

253

Vehicle Technologies Office Merit Review 2014: High Speed Joining of Dissimilar Alloy Aluminum Tailor Welded Blanks  

Broader source: Energy.gov [DOE]

Presentation given by Pacific Northwest National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high...

254

Vehicle Technologies Office Merit Review 2014: Aluminum Formability Extension through Superior Blank Processing  

Broader source: Energy.gov [DOE]

Presentation given by Pacific Northwest National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about...

255

Flows and Non-thermal Velocities in Solar Active Regions Observed with the Extreme-ultraviolet Imaging Spectrometer on Hinode: A Tracer of Active Region Sources of Heliospheric Magnetic Fields?  

E-Print Network [OSTI]

From Doppler velocity maps of active regions constructed from spectra obtained by the Extreme-ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft we observe large areas of outflow (20-50 km/s) that can persist for at least a day. These outflows occur in areas of active regions that are faint in coronal spectral lines formed at typical quiet Sun and active region temperatures. The outflows are positively correlated with non-thermal velocities in coronal plasmas. The bulk mass motions and non-thermal velocities are derived from spectral line centroids and line widths, mostly from a strong line of Fe XII at 195.12 Angstroms. The electron temperature of the outflow regions estimated from an Fe XIII to Fe XII line intensity ratio is about 1.2-1.4 MK. The electron density of the outflow regions derived from a density sensitive intensity ratio of Fe XII lines is rather low for an active region. Most regions average around 7E10+8 cm(-3), but there are variations on pixel spatial scales of about a factor of 4. We discuss results in detail for two active regions observed by EIS. Images of active regions in line intensity, line width, and line centroid are obtained by rastering the regions. We also discuss data from the active regions obtained from other orbiting spacecraft that support the conclusions obtained from analysis of the EIS spectra. The locations of the flows in the active regions with respect to the longitudinal photospheric magnetic fields suggest that these regions might be tracers of long loops and/or open magnetic fields that extend into the heliosphere, and thus the flows could possibly contribute significantly to the solar wind.

G. A. Doschek; H. P. Warren; J. T. Mariska; K. Muglach; J. L. Culhane; H. Hara; T Watanabe

2008-07-17T23:59:59.000Z

256

Tracer Studies on F-Actin Fluctuations  

Science Journals Connector (OSTI)

We present a study on the fluctuations of semiflexible actin filaments using fluorescence videomicroscopy, focusing on the end-to-end fluctuations of single filaments. In order to specifically measure the position of the polymer’s ends, we developed a novel noninvasive method that consists of annealing short end tags to the filaments. This allows us to probe polymer fluctuations to a very high accuracy. We compared the distribution of the end-to-end distance with recent theoretical results, and found excellent agreement. We also studied the dynamics of the mean-square end-to-end distance ?R2(t) and orientation of the ends, ??2(t), finding power laws t3/4 and t1/4, respectively. Scaling behavior for ?R2(t) is observed over several decades in relaxation time in agreement with theoretical results.

Loïc Le Goff; Oskar Hallatschek; Erwin Frey; François Amblard

2002-12-03T23:59:59.000Z

257

Lithogenic and cosmogenic tracers in catchment hydrology  

SciTech Connect (OSTI)

A variety of physical processes affect solute concentrations within catchment waters. The isotopic compositions of the solutes can indicate which processes have determined the observed concentrations. These processes together constitute the physical history of the water, which is one of the primary concerns in hydrology. Many groundwater solutes are derived as a result of interaction between the water and the rock and/or soil within the system. These are termed {open_quotes}lithogenic{close_quotes} solutes. The isotopic compositions of these solutes provide information regarding rock-water interactions. Many other solutes have their isotopic compositions determined both internally and externally to the catchment system. Important members of this group include solutes that have isotopic compositions produced by atomic particle interactions with other nuclides. The source of the atomic particles can be cosmic radiation (producing {open_quotes}cosmogenic{close_quotes} nuclides in the atmosphere and land surface), anthropogenic nuclear reactions (producing {open_quotes}thermonuclear{close_quotes} nuclides), or radioactive and fission decay of naturally-occurring elements, such as U and Th (producing {open_quotes}in-situ{close_quotes} lithogenic nuclides in the deep subsurface). Current language usage often combines all of the atomic particle-produced nuclides under the heading {open_quotes}cosmogenic nuclides{close_quotes}, and for simplicity we will often follow that usage, although always clearly indicating which variety is being discussed. This paper addresses the processes that affect the lithogenic and cosmogenic solute compositions in groundwater, and how these compositions can therefore be used in integrative ways to understand the physical history of groundwater within a catchment system.

Nimz, G.J.

1995-01-01T23:59:59.000Z

258

CPFLOW for Power Tracer and Voltage Monitoring  

E-Print Network [OSTI]

contact: Professor Hsiao-Dong Chiang School of Electrical and Computer Engineering Cornell University 328 of this publication is granted if appropriate attribution is given to this document as the source material and by the National Science Foundation through the grant NSF EEC 9616221 received under the Industry

259

MONITORING SUBSURFACE BARRIER INTEGRITY USING PERFLUOROCARBON TRACERS  

E-Print Network [OSTI]

National Laboratory, Hanford, Fernald, and Rocky Flats. Barriers are also considered an important reme

260

Ocean Tracers! John Bullister (NOAA-PMEL)  

E-Print Network [OSTI]

Chlorofluorocarbons- CFCs CFC-11 (F-11) - CCl3F CFC-12 (F-12) - CCl2F2 Carbon tetrachloride - CCl4 Sulfur Hexafluoride - SF6 Nitrous Oxide - N2O 2014 PMEL Kha$wala et. al., (2009) Anthropogenic carbon in the ocean #12;Quality · Recognized

Note: This page contains sample records for the topic "tracer prep blanks" 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

3, 24652497, 2003 Nudged GCM tracer  

E-Print Network [OSTI]

et al. Title Page Abstract Introduction Conclusions References Tables Figures Back Close Full Screen, The Netherlands 2 Space Research Organisation of the Netherlands (SRON), Utrecht, The Netherlands 3 Royal Netherlands Meteorological Institute (KNMI), De Bilt, The Netherlands 4 Max Planck Institut f¨ur Chemie (MPI

Paris-Sud XI, Université de

262

RCT#2-Instr for Prep of Rad Waste Disposal 7/00 Page 1 of 6 RADIATION CONTROL TECHNIQUE #2  

E-Print Network [OSTI]

INSTRUCTIONS FOR PREPARATION OF RADIOACTIVE WASTE FOR DISPOSAL I. PURPOSE: To establish a standard procedure for preparing Radioactive Waste and Radioactive Mixed Waste (RMW) to ensure it's efficient pick-up and disposal, labels, and pickup forms. III. PURPOSE: A. The goals of the radioactive waste program are to; - Minimize

Slatton, Clint

263

Hanford Site  

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

cells U Plant Demolition Prep U Plant Demolition Prep Demolishing large vertical tanks near U Plant Demolishing large vertical tanks near U Plant Demolishing large vertical tanks...

264

Hanford Site  

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

Moniz Separation Prep Separation Prep Workers Prepare Workers Prepare More Photos Hanford Weather Fire Danger is Low Follow the cleanup of Hanford River Corridor and...

265

US ITER | Media Corner  

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

ITER preps for high performance plasma heating US ITER preps for high performance plasma heating New test results and innovations advance ion cyclotron high power transmission...

266

Analysis of Tracer Dispersion During a Prescribed Forest Burn  

E-Print Network [OSTI]

become a method to manage forest health, while preventing uncontrolled wild land fire. Low intensity, prescribed burns release less carbon dioxide than wildfires of the same size and may be used as a strategy. The ultimate goal of the project is to use the data from the burn, along with modeling techniques to improve

Collins, Gary S.

267

Unraveling DPF Degradation using Chemical Tracers and Opportunities...  

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

stability, and accuracy while incorporating single-cell structures and simple electronics into low-cost designs deer10sappok.pdf More Documents & Publications Key...

268

Unraveling DPF Degradation using Chemical Tracers and Opportunities...  

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

Zisholtz Ash Impacts Diesel Particulate Filter Performance Ash Sources Lubricant additives (Zn, Ca, Mg, S, P) Engine wear, corrosion, trace metals in fuels Source: K....

269

Stable Lead Isotopes as a Tracer in Coastal Waters  

Science Journals Connector (OSTI)

...agreement with presently accepted seawater values. 1424 Lead soutrces...re-spectively. Surface seawater samples were col-lected in...samples were peristaltically pumped through CPE tubing weighted...with presently ac-cepted seawater values (3, 9); that is...

V. J. STUKAS; C. S. WONG

1981-03-27T23:59:59.000Z

270

Alkyl Amides and Nitriles as Novel Tracers for Biomass Burning  

Science Journals Connector (OSTI)

Ammonia emissions into the atmosphere have been reported for numerous sources, as for example natural decay in soils, sewage treatment plants, livestock waste, and ammonia-based fertilizers (42, 43). ... Anal. of emissions from the burning of dried tropical grasses and agricultural wastes in a small-scale app. ... under the smoldering conditions of residential wood combustion, as compared to the active burning of forest fires and slash burns, incomplete combustion resulted in the preservation of high levels of the natural products. ...

Bernd R. T. Simoneit; A. I. Rushdi; M. R. bin Abas; B. M. Didyk

2002-11-23T23:59:59.000Z

271

Charged Higgs Boson: Tracer of the Physics beyond Standard Model  

E-Print Network [OSTI]

Charged Higgs boson can exist in many physics beyond the standard models (BSM) and it is the obvious BSM signal. We briefly describe why the 125GeV scalar discovered at the LHC must have (heavy) companion: the charged Higgs boson, in a new paradigm. We then focus on the charged Higgs phenomenology, especially on how to measure $\\tan\\beta$ precisely utilizing the top quark polarization information.

Zhu, Shou-hua

2014-01-01T23:59:59.000Z

272

REAL-TIME TRACER MONITORING OF RESERVOIR STIMULATION PROCEDURES  

SciTech Connect (OSTI)

Ongoing Phase 2 work comprises the development and field-testing of a real-time reservoir stimulation diagnostic system. Phase 3 work commenced in June 2001, and involved conducting research, development and field-testing of real-time enhanced dual-fluid stimulation processes. Experimental field-testing to date includes three well tests. Application of these real-time stimulation processes and diagnostic technologies has been technically successful with commercial production from the ''marginal'' reservoirs in the first two well tests. The third well test proved downhole-mixing is an efficient process for acid stimulation of a carbonate reservoir that produced oil and gas with 2200 psi bottomhole reservoir pressure, however, subsequent shut-in pressure testing indicated the reservoir was characterized by low-permeability. Realtimezone continues to seek patent protection in foreign markets to the benefit of both RTZ and NETL. Realtimezone and the NETL have licensed the United States patented to Halliburton Energy Services (HES). Ongoing Phase 2 and Phase 3 field-testing continues to confirm applications of both real-time technologies, from well testing conducted over the last 12-month work period and including well test scheduled for year-end of 2002. Technical data transfer to industry is ongoing via Internet tech-transfer, public presentations and industry publications. Final Phase 3 test work will be focused on further field-testing the innovational process of blending stimulation fluids downhole. This system provides a number of advantages in comparison to older industry fracturing techniques and allows the operator to control reservoir fracture propagation and concentrations of proppant placed in the reservoir, in real-time. Another observed advantage is that lower friction pressures result, which results in lower pump treating pressures and safer reservoir hydraulic fracturing jobs.

George Scott III

2002-08-01T23:59:59.000Z

273

Isotopic Tracers for Biogeochemical Processes and Contaminant Transport: Hanford, Washington  

SciTech Connect (OSTI)

Our goal is to use isotopic measurements to understand how contaminants are introduced to and stored in the vadose zone, and what processes control migration from the vadose zone to groundwater and then to surface water. We have been using the Hanford Site in south-central Washington as our field laboratory, and our investigations are often stimulated by observations made as part of the groundwater monitoring program and vadose zone characterization activities. Understanding the transport of contaminants at Hanford is difficult due to the presence of multiple potential sources within small areas, the long history of activities, the range of disposal methods, and the continuing evolution of the hydrological system. Observations often do not conform to simple models, and cannot be adequately understood with standard characterization approaches, even though the characterization activities are quite extensive. One of our objectives is to test the value of adding isotopic techniques to the characterization program, which has the immediate potential benefit of addressing specific remediation issues, but more importantly, it allows us to study fundamental processes at the scale and in the medium where they need to be understood. Here we focus on two recent studies at the waste management area (WMA) T-TX-TY, which relate to the sources and transport histories of vadose zone and groundwater contamination and contaminant fluid-sediment interaction. The WMA-T and WMA-TX-TY tank farms are located within the 200 West Area in the central portion of the Hanford Site (Fig. 2). They present a complicated picture of mixed groundwater plumes of nitrate, {sup 99}Tc, Cr{sup 6+}, carbon tetrachloride, etc. and multiple potential vadose zone sources such as tank leaks and disposal cribs (Fig. 3). To access potential vadose zone sources, we analyzed samples from cores C3832 near tank TX-104 and from C4104 near tank T-106. Tank T-106 was involved in a major event in 1973 in which 435,000 L of high activity waste leaked to the vadose zone over a seven-week period. Other nearby tanks (T-103 and T-101) are also suspected of having leaked or overfilled. Pore water from these cores was analyzed for U and Sr isotopic compositions. Increasing {sup 99}Tc concentration in monitoring well 299-W11-39 (to 27,000 pCi/L in 2005) near the northeast corner of the WMA-T area prompted the emplacement of a series of new wells, 299-W11-25B, W11-45 (down gradient), and W11-47 (Fig. 3), during which depth discrete samples were collected below the groundwater surface. The depth profile from W11-25B revealed high {sup 99}Tc concentrations peaking at 182,000 pCi/L at {approx}10 m below the water table (Dresel et al. 2006). We obtained aliquots for isotopic analysis of groundwater samples produced by purge-and-pump sampling during the drilling of W11-25B, -45 and -47. In addition we have analyzed groundwater samples from monitoring wells in the vicinity of WMA T-TX-TY.

Donald J. DePaolo; John N. Christensen; Mark E. Conrad; and P. Evan Dresel

2007-04-19T23:59:59.000Z

274

Microfluidic Investigation of Tracer Dye Diffusion in Alumina Nanofluids  

E-Print Network [OSTI]

to prepare new refrigerant formulations containing dispersed nanomaterials, including graphene nanosheets, carbon nanotubes and metal oxide and nitride. The influence of key parameters such as particle type, size and volume fraction on the suspension...

Ozturk, Serdar 1979-

2012-10-05T23:59:59.000Z

275

AN INTERCOMPARISON OF TRACER GASES USED FOR AIR INFILTRATION MEASUREMENTS  

E-Print Network [OSTI]

Janssen, A.N. Pearman, Honeywell, Inc. , Minneapolis, MN,gas. TABLE Z Research Group Honeywell Princeton LBL LBL LBL

Grimsrud, D.T.

2011-01-01T23:59:59.000Z

276

Advancing reactive tracer methods for measuring thermal evolution...  

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

et al. (2003) - Use simplified geometry of hypothetical fracture system - Develop in MATLAB, to allow distribution to industry via the MATLAB compiler * Conducted 2-D finite...

277

A Tracer Investigation oftheAtmosph^c Dispersion  

E-Print Network [OSTI]

Laboratory Erik Lyck Air Pollution Laboratory National Agency of Environmental Protection Abstract. Mining at Kvanefjeld, Greenland, will result in releases of air polluting gases. In order to measure the dilution and a sea-breeze. INIS-descriptors: AIR POLLUTION; DILUTION; DISPERSION; ENVIRONMENTAL IMPACTS; GASES

278

National Biomedical Tracer Facility (NBTF). Project definition study: Phase I  

SciTech Connect (OSTI)

This report describes a five-year plan for the construction and commissioning of a reliable and versatile NBTF facility for the production of high-quality, high-yield radioisotopes for research, biomedical, and industrial applications. The report is organized in nine sections providing, in consecutive order, responses to the nine questions posed by the U.S. Department of Energy in its solicitation for the NBTF Project Definition Study. In order to preserve direct correspondence (e.g., Sec. 3 = 3rd item), this Introduction is numbered {open_quotes}0.{close_quotes} Accelerator and facility designs are covered in Section 1 (Accelerator Design) and Section 2 (Facility Design). Preliminary estimates of capital costs are detailed in Section 3 (Design and Construction Costs). Full licensing requirements, including federal, state, and local ordinances, are discussed in Section 4 (Permits). A plan for the management of hazardous materials to be generated by NBTF is presented in Section 5 (Waste Management). An evaluation of NBTF`s economic viability and its potential market impact is detailed in Section 6(Business Plan), and is complemented by the plans in Section 7 (Operating Plan) and Section 8 (Radioisotope Plan). Finally, a plan for NBTF`s research, education, and outreach programs is presented in Section 9 (Research and Education Programs).

Lagunas-Solar, M.C.

1995-02-15T23:59:59.000Z

279

ORIGINAL PAPER Evaluating sedimentary geochemical lake-level tracers  

E-Print Network [OSTI]

Walker Lake has been generated through analysis of total inorganic car- bon (TIC), total organic carbon (TOC), and oxy- gen and carbon isotope ratios (d18 O and d13 C) of both downcore bulk TIC and ostracods in %TIC, %TOC, and d13 C and d18 O of TIC and ostracods are all associated to varying degrees with changes

Linsley, Braddock K.

280

Stable Isotope Tracers in the Life Sciences and Medicine  

Science Journals Connector (OSTI)

...E 300 70 0 8 162432 40485664 7280 8896, Time of metabolism (minutes) 0 200 d 100 00 0 1 2 3 4 5 6 7 Time (days) e\\ dFig. 9 (left). "C NMR spectra of a live suspension of Candida utilis with noise-modulated proton decoupling during the me-tabolism...

N. A. Matwiyoff; D. G. Ott

1973-09-21T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Chlorofluorocarbons as tracers of landfill leachate in surface and groundwater  

Science Journals Connector (OSTI)

...considerably lower concentrations in landfill gas. CFCs and CCl4 in leachate may...all groundwater, leachate and landfill gas samples were taken on 6 April 2004...at the central site facility. Landfill gas was sampled by attaching a thick...

A. E. Foley; T. C. Atkinson; Y. Zhao

282

Nonuniform Groundwater Discharge across a Streambed: Heat as a Tracer  

Science Journals Connector (OSTI)

...from the same coil of cable and it was assumed that...needed from a thermocouple cable. Each thermocouple end...measurement point were insulated with rubber foam. The temperature records...attachments of the thermocouple cable ends in the multiplexer...

Jannick Kolbjørn Jensen; Peter Engesgaard

283

Use of Tracers to Characterize Fractures in Engineered Geothermal...  

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

define the subsurface system of fractures and mapping of fluid flow. * limited fracture detection capability * lack of high-temperature monitoring tools and sensors *...

284

Quantum Dot Tracers for Use in Engineered Geothermal Systems  

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

define the subsurface system of fractures and mapping of fluid flow. * limited fracture detection capability * lack of high-temperature monitoring tools and sensors *...

285

Validation of Geothermal Tracer Methods in Highly Constrained...  

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

methods for measuring thermal evolution in CO2-and water-based geothermal reservoirs Fracture Evolution Following a Hydraulic Stimulation within an EGS Reservoir Quantum Dot...

286

Quantum Dot Tracers for Use in Engineered Geothermal Systems...  

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

nanoparticles(quantum dots)that offer great promise for use in characterizing fracture networks in EGS reservoirs. tracersrosequantumdot.pdf More Documents &...

287

Stable Isotope Tracers in the Life Sciences and Medicine  

Science Journals Connector (OSTI)

...the result of cumulative isotope effects...reduced carbon + oils HCO3z solid carbonates...medicine. As production of stable isotopes...Meyerson and E. K. Fields, Science 166...H. Kollman, Production of Algae Containing...et al., Mass Production of Chlorella...Chicago, Chicago, Illinois. The present...

N. A. Matwiyoff; D. G. Ott

1973-09-21T23:59:59.000Z

288

INFORMAL REPORT MULTI-TRACER CONTROL ROOM AIR INLEAKAGE PROTOCOL  

E-Print Network [OSTI]

For discussion with the Nuclear Power Plant Industry January 2002 Research by BNL investigators was performed and tested to handle the unusually large flowrates in a number of HVAC zones in power stations. A review of the plans of a particular nuclear power plant and subsequent simulations of the tagging and sampling results

289

Deuterium: Natural Variations Used as a Biological Tracer  

Science Journals Connector (OSTI)

...School of Hygiene and Public Health, Baltimore, Maryland 21205...Colorado. This diet was depleted in deuterium content since...water when it passes over hot uranium metal. The relative deuterium...continually breathing deu-terium-depleted water vapor (near Morrison...

Jim D. Gleason; Irving Friedman

1970-09-11T23:59:59.000Z

290

Multispecies Reactive Tracer Test in a Sand and  

E-Print Network [OSTI]

of water quality in public water systems; remediation of contaminated sites, sediments and ground water Subsurface Protection and Remediation Division National Risk Management Research Laboratory Ada, OK 74820 Agency is charged by Congress with protecting the Nation's land, air, and water resources. Under

291

Informal Report USE OF PERFLUOROCARBON TRACER (PFT) TECHNOLOGY  

E-Print Network [OSTI]

to ground water movement, meteorological water infiltration, vapor- and gas-phase transport, transpiration). Introduction One of the more promising remediation options available to the DOE waste management community contaminant plumes and to restrict remediation methods, such as vacuum extraction, to a limited area

292

Preferential Flow Patterns in Paddy Fields Using a Dye Tracer  

Science Journals Connector (OSTI)

...cultivated regions (Zhu et al., 2000). The widespread use of agrochemicals carries the risk of unintended losses and contamination of...mechanically more stable due to their cylindrical shape and composition (e.g., Hartge and Sommer, 1980 Blackwell, 1990 Horn...

Till Sander; Horst H. Gerke

293

Voices of Four Taiwanese College Students' Experiences with the Test of English for International Communication (TOEIC) Preparation (PREP) Computer Assisted Language Learning (CALL)  

E-Print Network [OSTI]

emerged from the study: (a) students’ motivations derived from their English learning backgrounds, (b) online learning and flexible scheduling, (c) language test preparation through online learning, and (d) improving performance on the TOEIC test...

Chen, To-Yu

2014-02-19T23:59:59.000Z

294

The Effects of Oxygen Plasma on the Chemical Composition and Morphology of the Ru Capping Layer of the Extreme Ultraviolet (EUV) Mask Blanks  

SciTech Connect (OSTI)

Contamination removal from extreme ultraviolet (EUV) mask surfaces is one of the most important aspects to improve reliability for the next generation of EUV lithography. We report chemical and morphological changes of the ruthenium (Ru) mask surface after oxygen plasma treatment using surface sensitive analytical methods: X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and transmission electron microscopy (TEM). Chemical analysis of the EUV masks shows an increase in the subsurface oxygen concentration, Ru oxidation and surface roughness. XPS spectra at various photoelectron takeoff angles suggest that the EUV mask surface was covered with chemisorbed oxygen after oxygen plasma treatment. It is proposed that the Kirkendall effect is the most plausible mechanism that explains the Ru surface oxidation. The etching rate of the Ru capping layer by oxygen plasma was estimated to be 1.5 {+-} 0.2 {angstrom}/min, based on TEM cross sectional analysis.

Belau, Leonid; Park, Jeong Y.; Liang, Ted; Somorjai, Gabor A.

2008-06-07T23:59:59.000Z

295

Originally presented at Photomask Japan '94, Kanagawa Science Park, April, 1994 Attenuated phase-shifting photomasks fabricated from Cr-based embedded shifter blanks  

E-Print Network [OSTI]

the cathode powers and gas mixture. Cr-based films' flexible properties are suitable for several applications

Rollins, Andrew M.

296

The Effects of Oxygen Plasma on the Chemical Composition and Morphology of the Ru Capping Layer of the Extreme Ultraviolet (EUV) Mask Blanks  

E-Print Network [OSTI]

P-5B-03 The effects of oxygen plasma on the chemicalRu) mask surface after oxygen plasma treatment using surfacein the subsurface oxygen concentration, Ru oxidation and

Belau, Leonid

2009-01-01T23:59:59.000Z

297

U.S. Department of Energy Categorical Exclusion ...  

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

Removal of Glass Feed Prep System from 786-A (EDL) Savannah River Site AikenAikenSouth Carolina The small scale Glass Feed Prep System (GFPS) was designed, fabricated and...

298

Early consonant/vowel asymmetry: evidence from speech segmentation in French-learning  

E-Print Network [OSTI]

.5/8 months: monosyllabic (Goyet et al. in prep ; Gout, 2001) and bisyllabic words (Polka & Sundara, 2011

Gutkin, Boris

299

Treatment of experimental asthma using a novel peptide inhibitor of the inducible T cell kinase  

E-Print Network [OSTI]

Precipitation small-scale purification and/or concentrationMini Prep small scale (50 µg yield) DNA purification

Guimond, David M.; Guimond, David M.

2012-01-01T23:59:59.000Z

300

New Products  

Science Journals Connector (OSTI)

...syngene.com PCR PREP WORKSTATIONS My-PCR Prep provides the molecular biology laboratory technician with a "personal cleanroom" for use in the amplification of DNA and RNA. Between amplifications, My-PCR Prep can be irritated with shortwave ultraviolet...

2012-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

New Products  

Science Journals Connector (OSTI)

...quantachrome.com PCR PREP WORKSTATIONS MY-PCR Prep provides the molecular biology laboratory technician with a "personal cleanroom" for use in the amplification of DNA and RNA. Between amplifications, My-PCR Prep can be irradiated with shortwave ultraviolet...

2013-12-20T23:59:59.000Z

302

Efficiency Gains in Tracer Identification for Nuclear Imaging: Can In Vivo LC-MS/MS Evaluation of Small Molecules Screen for Successful PET Tracers?  

Science Journals Connector (OSTI)

In this retrospective analysis, we characterized the brain penetration or peak SUV (standardized uptake value), binding potential (BP), and brain exposure kinetics across a series of known, nonradiolabeled PET ligands using in vivo LC-MS/MS (liquid chromatography coupled to mass spectrometry) and correlated these parameters with the reported PET ligand performance in nonhuman primates and humans available in the literature. ... Biodistribution was investigated in mice and phosphorimages of brains were obtained from rats. ...

Elizabeth M. Joshi; Anne Need; John Schaus; Zhaogen Chen; Dana Benesh; Charles Mitch; Stuart Morton; Thomas J. Raub; Lee Phebus; Vanessa Barth

2014-09-23T23:59:59.000Z

303

Hydrologic Tracer Studies Conducted August 20 - 25, 1962 Near Cape Thompson, Alaska  

Office of Legacy Management (LM)

S S T A T E DIEPAR- O F THE IlVTERIGR GEOLOGICAL SURVEX Federal Cenzer, Denver 2 5 , C a l o r a a o DATA RELEASE - Sept. 1 0 , 1963 HYDROLOGIC TRACEEI STUDIES CONDUCTED A U G ~ T 20-25, 1962 NEAR CAPE THOMPSON, ALASKA V. J. Janzer and W. A. Beetem . . . . . . . . . . . . . . . . . . . . . . I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . P l o t ? r e p a r a t i o n . . . . . . . . . . . . D i s t r i b u t i o n c o e f f i c i e n t s , f i e l d . . . . . . . . . D i s t r i b u t i o n c o e f f i c i e n t s , l a b o r a t o r y , . . . . . . . . . . . . . . . . L n f i l t r a t i c n e q e r i m e n t . - . . . . . . . . . . . . . . . . Stream d i s p e r s i o n s t u d y . . . . . . . . . . . . . . . . Sedan event f z l l o u t p l o t s . . . . . . . . . . . . . . . . . . . . . References c i t e d ILLUSTRATIONS Figure I . Summed c o u n t s removed from cesium s o i l by s u c c e s s i v e e q u i l i b r a t i o n s , . . . . . . . . 2. S m e d c o u n t s removed from s t r o n t i u m s o i l by s u c c e s s i v e e a - u i l i b r a t i o n s . . . . . . . . . 3. P l

304

Dust continuum emission as a tracer of gas mass in galaxies  

E-Print Network [OSTI]

We use a sample of 36 galaxies from the KINGFISH (Herschel IR), HERACLES (IRAM CO), and THINGS (VLA HI) surveys to study empirical relations between Herschel infrared (IR) luminosities and the total mass of the interstellar gas (H2+HI). Such a comparison provides a simple empirical relationship without introducing the uncertainty of dust model fitting. We find tight correlations, and provide fits to these relations, between Herschel luminosities and the total gas mass integrated over entire galaxies, with the tightest, almost linear, correlation found for the longest wavelength data (SPIRE500). However, we find that accounting for the gas-phase metallicity (affecting the dust-to-gas ratio) is crucial when applying these relations to low-mass, and presumably high-redshift, galaxies. The molecular (H2) gas mass is found to be better correlated with the peak of the IR emission (e.g. PACS160), driven mostly by the correlation of stellar mass and mean dust temperature. When examining these relations as a function ...

Groves, Brent A; Leroy, Adam; Galametz, Maud; Walter, Fabian; Bolatto, Alberto; Hunt, Leslie; Dale, Daniel; Calzetti, Daniela; Croxall, Kevin; Kennicutt, Robert

2014-01-01T23:59:59.000Z

305

Neural network approaches to tracer identification as related to PIV research  

E-Print Network [OSTI]

code ivas capable of extracting, the centroids of all of the syntlie?c spots This network wns tlieu apl&lied to nn &uiage taken fro&n n previous expenment It perfornied as well as a global thresholdrng algor&thm The cellular network was the lenst... elec!inc H wever, tlie pronf given by !Bi?sky ivas nnly for single-laver per. eptrnns, and did nnt apply tc multi-layer network. Several researc!icis, :ca&ca& ivhoni were Ivohouen f'ros)bm" A?dere&?i, aud Hop- f&elcl, niauitaiued their enthusiasui f...

Seeley, Charles Henry

1992-01-01T23:59:59.000Z

306

Isotope and Ion Selectivity in Reverse Osmosis Desalination: Geochemical Tracers for Man-made Freshwater  

Science Journals Connector (OSTI)

A systematic measurement of ions and 2H/1H, 7Li/6Li, 11B/10B, 18O/16O, and 87Sr/86Sr isotopes in feed-waters, permeates, and brines from commercial reverse osmosis (RO) desalination plants in Israel (Ashkelon, Eilat, and Nitzana) and Cyprus (Larnaca) reveals distinctive geochemical and isotopic fingerprints of fresh water generated from desalination of seawater (SWRO) and brackish water (BWRO). ... The specific geochemical and isotopic fingerprints of SWRO provide a unique tool for tracing “man-made” fresh water as an emerging recharge component of natural water resources. ... O and H isotopes were determined by dual inlet and continuous flow mass spectrometry following gas–water equilibration (analytical uncertainties ±0.8‰ for ?2H and ±0.1‰ for ?18O). ...

Wolfram Kloppmann; Avner Vengosh; Catherine Guerrot; Romain Millot; Irena Pankratov

2008-05-21T23:59:59.000Z

307

The Critical Density and the Effective Excitation Density of Commonly Observed Molecular Dense Gas Tracers  

E-Print Network [OSTI]

The optically thin critical densities and the effective excitation densities to produce a 1 K km/s (or 0.818 Jy km/s $(\\frac{\

Shirley, Yancy L

2015-01-01T23:59:59.000Z

308

Uncertainties in Air Exchange using Continuous-Injection, Long-Term Sampling Tracer-Gas Methods  

E-Print Network [OSTI]

Pollutant Control Index: A New Method of Characterizing Ventilation in Commercial Buildings." Proceedings of Indoor Air'

Sherman, Max H.

2014-01-01T23:59:59.000Z

309

Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure Ventilation Rates in Homes  

E-Print Network [OSTI]

Pollutant Control Index: A New Method of Characterizing Ventilation in Commercial Buildings." Proceedings of Indoor Air'

Lunden, Melissa

2014-01-01T23:59:59.000Z

310

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......underestimate the complexity of energy retrofitting itself. In...Hazards Associated With Home Energy Retrofits. (2012) The National Renewable Energy Laboratory, U.S. Department...for the purpose of radon mitigation effectiveness proper evaluation......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

311

Rare earth elements as tracers of sediment contamination by phosphogypsum in the Santos estuary, southern Brazil  

Science Journals Connector (OSTI)

In the Cubatão region, southern Brazil, sediments are transported by several rivers from the Serra do Mar Ridge into the Santos estuary. Fertilizer plants have been operating along the margins of one of these rivers (Mogi River) producing a large volume of phosphogypsum, which is stockpiled in nearby areas. Surface sediments of the Mogi River were sampled upstream and downstream in relation to the point where the effluents of the phosphogypsum piles flow into the drainage system. In the vicinity of this point one sediment core was collected. Results show that REE, Ba, Zr and Th concentrations in the non-contaminated sediments are of the same order as those present in the upper continental crust. The contaminated samples present a composition affected by that of the phosphogypsum, marked by a higher concentration of these elements and a stronger degree of REE fractionation. These phosphogypsum characteristics are inherited from the Catalão igneous phosphate ore and were moderately modified by the industrial process of phosphoric acid production. The phosphogypsum signal decreases rapidly downstream, pointing to a limited area of influence of the stacks. The deepest sediments of the core are also free of contamination, representing a time interval prior to the deposition of phosphogypsum wastes on the banks of the estuary.

Sonia Maria Barros de Oliveira; Paulo Sergio Cardoso da Silva; Barbara Paci Mazzilli; Deborah Ines Teixeira Favaro; Catia Heloisa Saueia

2007-01-01T23:59:59.000Z

312

SOURCES AND EFFECTS OF MINING-RELATED AND NATURAL ACID ROCK DRAINAGE QUANTIFIED USING TRACER  

E-Print Network [OSTI]

DILUTION, COAL CREEK WATERSHED, GUNNISON COUNTY, COLORADO by Brianna Shanklin B.S., Auburn University, 2004 written by Brianna Shanklin has been approved for the Department of Civil, Environmental;iii ABSTRACT Shanklin, Brianna L. (M.S., Department of Civil Engineering) Sources and Effects

Ryan, Joe

313

Stable lead isotope tracers of air mass trajectories in the Mediterranean region  

Science Journals Connector (OSTI)

... positioned off the North African shore of western Algeria. The atmospheric lead concentration determined by flameless atomic absorption spectroscopy11 was 56 ± 5 ng m~3. This value is much ...

Hal Maring; Dorothy M. Settle; Patrick Buat-Ménard; François Dulac; Clair C. Patterson

1987-11-18T23:59:59.000Z

314

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......indoor environment, standard methods of radon diagnosis...ventilation (specific modes of HVAC systems operation...for new houses given in standards. Table-5. Results...efforts to comply with the standard requirements on new buildings...services in buildings like HVAC systems, water and gas......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

315

Seiche-Induced Resuspension in Lake Kinneret: A Fluorescent Tracer Experiment  

Science Journals Connector (OSTI)

In warm-monomictic Lake Kinneret, wind-induced internal waves with amplitudes of up to 10 meters are common during April October. This study was aimed to follow the horizontal and vertical transport of resuspende...

B. Shteinman; W. Eckert; S. Kaganowsky; T. Zohary

1997-10-01T23:59:59.000Z

316

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......of newly built houses is primarily focused...buildings, the energy efficiency can be improved...in operation, house occupied. CONCLUSIONS...dominantly on home energy efficiency. The mean ACH in unoccupied houses was frequently......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

317

Using tracer experiments to determine deep saline aquifers caprocks transport characteristics for carbon dioxide storage  

E-Print Network [OSTI]

procedure in high permeability rocks such as hydrocarbon reservoirs or aquifers. However, the permeability to the determination of transport characteristics of tight rock formations. Main obtained parameters are intrinsic permeability and the Klinkenberg coefficient; permeability as low as 10-21 m2 is easily attainable. Some

Boyer, Edmond

318

Radium in the Dead Sea: a possible tracer for the duration of meromixis  

SciTech Connect (OSTI)

Three profiles of /sup 226/Ra in the meromictic Dead Sea measured during 1963-1978 indicate that the radium activities in the upper water mass were higher than in the lower water mass. All three profiles indicate a similar radium inventory. The age of the meromictic structure is estimated by a model which requires that the radium inventory of the lake be at a steady state, that sometime in the past the radium profile of the lake had been uniform and that the contemporaneous profiles of radium have been built up by inflows of radium solely into the upper water mass, while the monimolimnion is relict, isolated, and loses radium only by radioactive decay. Supporting evidence is presented suggesting that the above conditions may be fulfilled.

Stiller, M.; Chung, Y.C.

1984-05-01T23:59:59.000Z

319

Radium in the Dead Sea: a possible tracer for the duration of meromixis  

SciTech Connect (OSTI)

Three profiles of /sup 226/Ra in the meromictic Dead Sea measured during 1963-1978 indicate that the radium activities in the upper water mass were higher than in the lower water mass. All three profiles indicate a similar radium inventory. The Jordan inflow is not the primary source of radium to the Dead Sea. Mineral springs and submerged seepages are probably more important contributors. The age of the meromictic structure is estimated by a model which requires that the radium inventory of the lake be at a steady state, that sometime in the past the radium profile of the lake had been uniform (when either the lake was monomictic or an overturn had ended an earlier meromictic phase) and that the contemporaneous profiles of radium have been built up by inflows of radium solely into the upper water mass, while the monimolimnion is relict, isolated, and loses radium only by radioactive decay. Supporting evidence is presented suggesting that the above conditions may be fulfilled. Thus, it is possible to estimate that the Dead Sea was meromictic for about 300 years before the turnover in 1979. From tentative balances of the Dead Sea dissolved salts it is shown that a previous overturn might have occured at a lower lake level than in 1979.

Stiller, M.; Chung, Y.C.

1984-05-01T23:59:59.000Z

320

Atmospheric polycyclic aromatic hydrocarbons and isomer ratios as tracers of biomass burning emissions in Northern India  

Science Journals Connector (OSTI)

Emission from large-scale post-harvest agricultural-waste burning (paddy-residue burning during October–November and wheat-residue burning in April–May) is a conspicuous feature ... in northern India. The poor an...

Prashant Rajput; M. M. Sarin; Deepti Sharma…

2014-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Stable nitrogen isotope measurements of marine bacterial proteins and nucleic acids: tracers of microbial activity  

E-Print Network [OSTI]

Stable nitrogen isotopes ([]15N) can trace elemental cycling in aquatic ecosystems if the enzyme mediated fractionations associated with nutrient uptake and assimilation are negligible or consistently predictable. In this study, bacterial proteins...

Kovacs, Jeffrey Paul

2012-06-07T23:59:59.000Z

322

Rationale for the H-19 and H-11 tracer tests at the WIPP site  

SciTech Connect (OSTI)

The Waste Isolation Pilot Plant (WIPP) is a repository for transuranic wastes constructed in bedded Permian-age halite in the Delaware Basin, a sedimentary basin in southeastern New Mexico, USA. A drilling scenario has been identified during performance assessment (PA) that could lead to the release of radionuclides to the Culebra Dolomite Member of the Rustler Formation, the most transmissive water-saturated unit above the repository horizon. Were this to occur, the radionuclides would need to be largely contained within the Culebra (or neighboring strata) within the WIPP-site boundary through the period lasting for 10,000 years after repository closure for WIPP to remain in compliance with applicable regulations on allowable releases. Thus, processes affecting transport of radionuclides within the Culebra are of importance to PA.

Beauheim, R.L.; Meigs, L.C.; Davies, P.B.

1996-12-31T23:59:59.000Z

323

The Use of Tracers to Investigate Phosphate Cycling in SoilPlant Systems  

E-Print Network [OSTI]

of available P, excessive P inputs in other agro-ecosystems result in the pollution of surface waters (Frossard), making up virtually 100% of the total P on earth, and seven radioactive isotopes. Only two radioactive are introduced at extremely low rates in natural systems from the atmosphere (Benitez-Nelson and Buesseler 1999

Gilli, Adrian

324

Tracer dye transport from a well fitted with a downhole heat exchanger, Klamath Falls, Oregon  

SciTech Connect (OSTI)

Low or medium temperature geothermal resources are often used for space and domestic hot water heating. If the resource is located at reasonably shallow depths and adjacent to a major population centre large amounts of relatively cheap, clean heat can be provided. Geothermal fluid is often brought to the surface, either under natural artesian pressure or by pumping, to be used in surface heat exchangers (SHEs). This method generally requires a second well for disposal of the cooled fluid and a substantial capital outlay for pumps and heat exchangers. Large amounts of heat can be extracted from just one or two wells using surface heat exchangers and the method can prove very cost effective in areas with a high density of energy intensive users. For smaller heat loads surface heat exchangers can become expensive and in many instances a downhole heat exchanger (DHE) installed directly in the well bore is capable of supplying cheap heat to a smaller number of users. This report first describes the methods used to carry out the series of dye tests, from well selection to injection of the dye samples. It then discusses the results of these tests in terms of how much dye was recovered, where it was recovered from and how long it took to arrive. The results of the concurrent temperature monitoring work and DHE heat output performance are also presented. Some recommendations are made for any future testing. 13 refs., 42 figs.

Dunstall, M.G.

1990-02-01T23:59:59.000Z

325

A radiocarbon method and multi-tracer approach to quantifying groundwater discharge to coastal waters  

E-Print Network [OSTI]

Groundwater discharge into estuaries and the coastal ocean is an important mechanism for the transport of dissolved chemical species to coastal waters. Because many dissolved species are present in groundwater in concentrations ...

Gramling, Carolyn M

2003-01-01T23:59:59.000Z

326

E-Print Network 3.0 - als tracer zur Sample Search Results  

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

Engineering, Reservoir Simulation Research Collection: Fossil Fuels 50 Pathogen and chemical transport in the karst limestone of the Biscayne aquifer Summary: and described by...

327

Motorola's Exhaust Optimization Program: Tracer Gas Application for Gas Panel Enclosures  

E-Print Network [OSTI]

of as high as 70% of manufacturer's specifications per gas enclosure. This approach leads to energy conservation and infrastructure cost avoidance for new exhaust fans, ductwork, abatement equipment, and make-up air systems....

Myart, H. R.; Camacho, R.

328

Idealized tracer transport models with time-varying transport: applications to ocean boundary currents  

Science Journals Connector (OSTI)

One-dimensional advection–diffusion and advection–diffusion–dilution (or “leaky-pipe”) models have been widely used to interpret a variety of geophysical phenomena. For example, in the ocean these tools have been...

F. Terenzi; Timothy M. Hall

2010-04-01T23:59:59.000Z

329

The use of 3H and O tracers to characterize water inflows  

E-Print Network [OSTI]

(Loetschberg, Gothard, Simplon), and various hydroelectric galleries from large dams (EDF hydroelectric installations in France, the Grande Dixence gallery in Swiss Wallis, hydroelectric galleries in the Aar massif

Paris-Sud XI, Université de

330

Airborne CO2 DIAL measurement of atmospheric tracer gas concentration distributions  

Science Journals Connector (OSTI)

An airborne differential absorption lidar system employing high-energy line-tunable CO2 lasers has been used to map cross-plume vertical distributions resulting from a...

Uthe, Edward E

1986-01-01T23:59:59.000Z

331

Comprehensive analysis of metabolic pathways through the combined use of multiple isotopic tracers  

E-Print Network [OSTI]

Metabolic Flux Analysis (MFA) has emerged as a tool of great significance for metabolic engineering and the analysis of human metabolic diseases. An important limitation of MFA, as carried out via stable isotope labeling ...

Antoniewicz, Maciek Robert

2006-01-01T23:59:59.000Z

332

Hillslope Hydrological Processes in a Costa Rican Rainforest: Water Supply Partitioning Using Isotope Tracers  

E-Print Network [OSTI]

systems in many rural areas. In this study, stable isotope tracing of ?^(18)O and ?D was used to determine the source of water in a stream, and the relative contributions of water budget components (e.g., groundwater, soil water). Samples were collected...

DuMont, Andrea Lyn

2014-04-24T23:59:59.000Z

333

Radon entry rate analyses using in situ tracer gas method application  

Science Journals Connector (OSTI)

......underneath the exterior slab insulation into the indoor environment...load-bearing and thermo insulation functions. Double-layer...layer, and the exterior slab insulation based on extrude polystyrene foam boards was provided below......

A. Fro?ka; K. Jílek

2014-07-01T23:59:59.000Z

334

Constraining the Parameter Space of the Dark Energy Equation of State Using Alternative Cosmic Tracers  

E-Print Network [OSTI]

We propose to use HII galaxies (HIIG) to trace the redshift-distance relation, by means of their $L(\\mathrm{H}\\beta) - \\sigma$ correlation, in an attempt to constrain the dark energy equation of state parameter solution space, as an alternative to the cosmological use of type Ia supernovae. For a sample of 128 local compact HIIG with high equivalent widths of their Balmer emission lines we obtained ionised gas velocity dispersion from high S/N, high-dispersion spectroscopy (Subaru-HDS and ESO VLT-UVES) and integrated H$\\beta$ fluxes from low dispersion wide aperture spectrophotometry. We find that the $L(\\mathrm{H}\\beta) - \\sigma$ relation is strong and stable against restrictions in the sample. The size of the starforming region is an important second parameter, while adding the emission line equivalent width or the continuum colour and metallicity, produces the solution with the smallest rms scatter. We have used the $L(\\mathrm{H}\\beta) - \\sigma$ relation from a local sample of HIIG and a local calibration ...

Chávez, Ricardo

2014-01-01T23:59:59.000Z

335

Abstract 5746: ARC-P HS+: A versatile radiosynthesizer for the production of PET tracers  

Science Journals Connector (OSTI)

...ultimately reached the stage of commercialization, enabling wide accessibility...procedures for the entire process from collection and stabilization...the identification of the process changes that were likely the...laboratory proceeded through this process of increasing robustness and...

Melissa D. Moore; Kevin Quinn; Shane Claggett; Mark Lazari; Gaurav J. Shah; Nagichettiar Satyamurthy; Michael E. Phelps; and R Michael van Dam

2012-04-15T23:59:59.000Z

336

Main-belt comets as tracers of ice in the inner Solar system  

E-Print Network [OSTI]

As a recently recognized class of objects exhibiting apparently cometary (sublimation-driven) activity yet orbiting completely within the main asteroid belt, main-belt comets (MBCs) have revealed the existence of present-day ice in small bodies in the inner solar system and offer an opportunity to better understand the thermal and compositional history of our solar system, and by extension, those of other planetary systems as well. Achieving these overall goals, however, will require meeting various intermediate research objectives, including discovering many more MBCs than the currently known seven objects in order to ascertain the population's true abundance and distribution, confirming that water ice sublimation is in fact the driver of activity in these objects, and improving our understanding of the physical, dynamical, and thermal evolutionary processes that have acted on this population over the age of the solar system.

Hsieh, Henry H

2014-01-01T23:59:59.000Z

337

Pathways and Mechanisms of OceanTracer Transport: Implications for Carbon Sequestration  

SciTech Connect (OSTI)

This funding enabled the following published manuscripts in which we have developed models of direct relevance to ocean carbon sequestration and of the oceanic iron cycle, its connection to the global carbon cycle, and the sensitivity of atmospheric carbon dioxide to the external source of iron. As part of this process we have developed the adjoint of the MIT ocean biogeochemistry model which has enabled us to perform rigorous and efficient sensitivity studies.

Marshall, John; Follows, MIchael

2006-11-06T23:59:59.000Z

338

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

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

S0045-6535(02)00145-5 Summary: Abstract Polycyclic aromatic hydrocarbons (PAHs) and dioxins are lipophilic organic pollutants occurring... absorption, pig INTRODUCTION...

339

Assessment of natural and anthropogenic hydrocarbon inputs using PAHs as tracers.  

E-Print Network [OSTI]

to produce liquid hydrocarbons and water. -- Coal-to-liquids (CTLs) are derived either by pyrolysis of coal authors accept that conventional oil resources are at an advanced stage of depletion and that liquid fuels is a heterogeneous mix of hydrocarbons that remain in liquid phase when extracted to the surface. -- Condensate

340

Nonlinear Advection Algorithms Applied to Interrelated Tracers: Errors and Implications for Modeling Aerosol–Cloud Interactions  

Science Journals Connector (OSTI)

Monotonicity constraints and gradient-preserving flux corrections employed by many advection algorithms used in atmospheric models make these algorithms nonlinear. Consequently, any relations among model variables transported separately are not ...

Mikhail Ovtchinnikov; Richard C. Easter

2009-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

Isotopes of helium, hydrogen, and carbon as groundwater tracers in aquifers along the Colorado River  

E-Print Network [OSTI]

hard rock formations and unconsolidated sediments can act asand Cherry, 1979). Unconsolidated deposits, particularlySemi-Pervious Good Unconsolidated Sand & Gravel Consolidated

Haber, Samuel Ainsworth

2009-01-01T23:59:59.000Z

342

Use of Long-Lived Natural Radioactivity as an Atmospheric Tracer  

Science Journals Connector (OSTI)

... group of radioactive isotopes for this purpose would be the longer-lived, daughter products of radon radium-D, -E and -F which are naturally present in the atmosphere as ... -F which are naturally present in the atmosphere as a result of the leakage of radon from soils and rocks on the Earth's surface.

W. M. BURTON; N. G. STEWART

1960-05-21T23:59:59.000Z

343

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between tracer diffusion  

E-Print Network [OSTI]

Chemical oxygen diffusion coefficient measurement by conductivity relaxation--correlation between J. P., Grenier J. C., Loup J. P. ABSTRACT Chemical oxygen diusion coecient ¯(D)was measured the oxygen partial pressure in the surrounding atmosphere of the sample. The consequent evolution

Paris-Sud XI, Université de

344

Astrocytic tracer dynamics estimated from [1-11C]-acetate PET measurements  

Science Journals Connector (OSTI)

......neurochemistry and metabolic processes in brain relies on indirect measurements such as...photon counting data to activity map in the brain, is a well-established practice, the...information about potential disease of the brain; see, e.g. Gjedde et al. (2010......

Andrea Arnold; Daniela Calvetti; Albert Gjedde; Peter Iversen; Erkki Somersalo

2014-11-01T23:59:59.000Z

345

DYES AS TRACERS FOR VADOSE ZONE HYDROLOGY Markus Flury and Nu Nu Wai  

E-Print Network [OSTI]

in the subsurface. Groundwater contamination often originates in the va- dose zone. Agrochemicals applied

Flury, Markus

346

Testing the Efficiency of a Stormwater Runoff Treatment Structure with Anthropogenic Tracers  

Science Journals Connector (OSTI)

...widespread application of agrochemicals-clearly impinges on the...1985) studied the chemical composition of stormwater runoff from...1 represented the average composition of the sediment removed by...and determination of the composition of the solids that settle...

THOMAS B. BOVING; KEVIN NEARY

347

Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films and  

E-Print Network [OSTI]

and multilayers,1 including neutron (NR), X-ray, or resonant X-ray reflectometry,4,5 Rutherford backscattering,6

348

Experiments to Evaluate and Implement Passive Tracer Gas Methods to Measure  

E-Print Network [OSTI]

the concentrations of pollutants emitted by indoor sources and brings in pollutants from the outdoors. The air Development Office of Healthy Homes and Lead Hazard Control through Interagency Agreement I-PHI-01070; by the U.S. Environmental Protection Agency Office of Air and Radiation through Interagency Agreement DW-89

349

Off-line algorithm for calculation of vertical tracer transport in the  

E-Print Network [OSTI]

-3, Midoricho, Tachikawa, Tokyo 190-8518, Japan 3SRON Netherlands Institute for Space Research, Sorbonnelaan 2

350

E-Print Network 3.0 - abdominal tracer activity Sample Search...  

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

Fluid Dynamics ECCOMAS CDF 2006 Summary: . Priaux (Eds) TU Delft, Delft The Netherland, 2006 THE INFLUENCE OF ASYMMETRIC INFLOW IN ABDOMINAL AORTIC... of the aneurysmal...

351

Fairytale Cynicism in the Kingdom of Plastic Bags: Mapping Power and Powerlessness in Chelnochovsk-na-Dniestre, Ukraine  

E-Print Network [OSTI]

Chelnochovsk-na-Dniestre, Ukraine Diana R. Blank Berkeley PChelnochovsk-na-Dniestre, Ukraine Diana R. Blank Spring 2003emerging ethnography on Ukraine is based, and perhaps, in

Blank, Diana R.

2003-01-01T23:59:59.000Z

352

A Framework for Distributed Preservation Workflows  

E-Print Network [OSTI]

2), 1746–8256. Hedges,M. ; Hasan, A. ; and Blanke, T. 2007.the iRods system (Hedges, Hasan, and Blanke 2007). Another

Schmidt, Rainer; King, Ross; Steeg, Fabian; Melms, Peter; Jackson, Andrew; Wilson, Carl

2009-01-01T23:59:59.000Z

353

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X8A All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X8A All users must procedure for removal of solder wasteSolder B CLOSE OUT Secure the beamline and disable shutter/beam before for this beamline:I understand the instructions given to me on beamline operations and safety awareness. Date UAdm

Ohta, Shigemi

354

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline U3C All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline U3C All users mustVent System A Avoid skin contact with soldering iron to prevent burns to the skinBurns B Use caution when and safety awareness. Date UAdmTrainer's Signature Bin Dong LU-BLOSA-U3C R = NSLS Content A = Applicable

Ohta, Shigemi

355

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X20A All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X20A All users must A Review procedure and location for temporary SAA (for soldering or other wastes)SAA - Solder B CLOSE OUT to me on beamline operations and safety awareness. Date UAdmTrainer's Signature J. Jordan-Sweet C

Ohta, Shigemi

356

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X20C All users must be instructed in operating the beamline safely. Leave checkbox blank if not applicable. Training valid 2 years. Visitors use Visitor/Escort forms.  

E-Print Network [OSTI]

BeamLine Operations and Safety Awareness (BLOSA) Checklist Beamline X20C All users must containerDisposal - Sharps A Review procedure and location for temporary SAA (for soldering or other wastes)SAA - Solder B CLOSE OUT Secure the beamline and disable shutter/beam before you leaveDisabling Beam A Review

Ohta, Shigemi

357

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC5207NA27344 Blank template  

E-Print Network [OSTI]

This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore here Title or division here Date 00, 2008 #12;Humankind challenges NIF-1208-15665.ppt 2Moses, FPA, LIFE, 12/03/08 #12;NIF-1208-15665.ppt Moses, FPA, LIFE, 12/03/08 3 Achieving ignition at the NIF can

358

11/30/12 11:58 AMQualtrics Survey Software Page 1 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php?PopType=SurveyPrintPreview&WID=_blank  

E-Print Network [OSTI]

11/30/12 11:58 AMQualtrics Survey Software Page 1 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php) #12;11/30/12 11:58 AMQualtrics Survey Software Page 2 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php;11/30/12 11:58 AMQualtrics Survey Software Page 3 of 4https://duke.qualtrics.com/ControlPanel/PopUp.php

359

E-Print Network 3.0 - affect pap smear Sample Search Results  

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

obtaining a Pap smear including Thin Prep Pap smear, obtaining a DNA probe swab... referral for follow-up and therapeutic intervention ... Source: Acton, Scott - Department of...

360

Joel Scruggs | Department of Energy  

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

Specialist, Bonneville Power Administration Most Recent Going Big: Building the Largest Ever Energy Efficiency Project August 16 Prepping Power Engineers for the Smart Grid June 19...

Note: This page contains sample records for the topic "tracer prep blanks" 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

Covered Product Category: Commercial Refrigerators and Freezers...  

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

Beer-dispensing and direct draw units Glass frosters Deep well and bunker freezers. Open-air units, deli cases, prep tables, drawer cabinets, laboratory-grade products,...

362

E-Print Network 3.0 - annelida Sample Search Results  

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

, P H . D . Hopkins Marine Station of Stanford University Summary: ., Gustafsson, D. & De Wit, P. (in prep.) Cryptic speciation in the whiteworm, Enchytraeus albidus (Annelida......

364

January 2014 | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

project contractor Siemens Government Technologies Inc., in signing one of the massive wind turbine blades that will become part of the Pantex Renewable Energy Project (PREP)....

365

Counseling and Psychological Services Response Rate: 26% (396/1523)  

E-Print Network [OSTI]

Speech anxiety - excessive nervousness (sweaty palms, stuttering, ming going blank) when asked to speak

Baltisberger, Jay H.

366

Foundations Jul Aug Nov DecSep Oct Jan Feb May JunMar Apr  

E-Print Network [OSTI]

IV Principal Clinical Experience (PCE): Core Clerkships Advanced Experiences & Scholarly Project IDD Advanced Experiences & Scholarly Project PCE Prep PCE SPS Homeostasis 1 Homeostasis 2 MBBD Pathways to the Profession (ITP) Immunity in Defense and Disease (IDD) SPS PCE Prep Social and Population Sciences: Health

Paulsson, Johan

367

5 SEPTEMBER 2014 VOL 345 ISSUE 6201 1195SCIENCE sciencemag.org/products LIFE SCIENCE TECHNOLOGIES  

E-Print Network [OSTI]

5 SEPTEMBER 2014 � VOL 345 ISSUE 6201 1195SCIENCE sciencemag.org/products LIFE SCIENCE TECHNOLOGIES NEW PRODUCTS: SAMPLE PREP Produced by the Science/AAAS Custom Publishing Office NGS Library Prep MagSi-NGSPREP is a magnetic, bead- based tool that offers an efficient solution for DNA cleanup and size selection in next

Napp, Nils

368

Molecular Gas in Early-type Galaxies  

E-Print Network [OSTI]

to talk science. Jesus Falc´on-Barroso: for the wonderfulmid-IR fluxes from Falc´on-Barroso et al. (2012, in prep).PAH ? 0.57 M yr ?1 (Falc´on-Barroso et al. 2012, in prep) a

Alatalo, Katherine Anne

2012-01-01T23:59:59.000Z

369

Isotopic tracer studies of oxygen transport through SiO2 films at 1000?°C using secondary ion mass spectrometry  

Science Journals Connector (OSTI)

Dry oxides (?8 ppm H2O) grown on Si(100) at 1000?°C at 1 atm using purified 1 6O2 and purified 1 8O2 were analyzed using secondary ion mass spectrometry.1 8O is observed at the interface in the bulk of the 1 6O oxide and at the surface in agreement with other recent reports. Our results show little lattice diffusion in agreement with Mikkelsen’s work [Appl. Phys. Lett. 4 5 1187 (1984)]. A previous report [J. Electrochem. Soc. 1 3 1 1944 (1984)] of appreciable lattice diffusion is due to higher water content.

C. J. Han; C. R. Helms

1986-01-01T23:59:59.000Z

370

Water quality studies in Kranji Catchment, Singapore : use of organic tracer and PEDs for identifying potential sewage sources  

E-Print Network [OSTI]

The objective of this study was to identify organic compounds that could serve as indicators of potential human fecal contamination sources to the Kranji Reservoir in Singapore that could be used as confirmation indicators ...

Mendez Sagel, Adriana (Adriana Raquel)

2010-01-01T23:59:59.000Z

371

Boron isotopes in tourmaline as a tracer of metasomatic processes in the Bamble sector of Southern Norway  

Science Journals Connector (OSTI)

For the B isotope determinations in tourmaline by secondary ion mass spectrometry...2009a) was used. The O? primary ion beam was accelerated to 14.5 keV at a beam current of 1 nA. The diameter of the spot used fo...

R. Bast; E. E. Scherer; K. Mezger…

2014-10-01T23:59:59.000Z

372

Determination of boron isotopic variations in aquatic systems with negative thermal ionization mass spectrometry as a tracer for anthropogenic influences  

Science Journals Connector (OSTI)

A technique for precise boron isotope ratio measurements with a high detection power ... –0.3% have been obtained for the determination of the 11B/10B isotope ratio using nanogram amounts of boron. Ba(OH)2 has be...

S. Eisenhut; K. G. Heumann; A. Vengosh

1996-03-01T23:59:59.000Z

373

Rate-limited U(VI) desorption during a small-scale tracer test in a hetereogeneous uranium contaminated aquifer  

E-Print Network [OSTI]

of Contaminants in the Hanford Vadose Zone, Vadose Zone J. ,transport in a contaminated Hanford sediment, Environ. Sci.of U(VI) observed in Hanford sediment column experiments. A

Fox, P.M.

2013-01-01T23:59:59.000Z

374

Association of Biomarkers of Systemic Inflammation with Organic Components and Source Tracers in Quasi-Ultrafine Particles  

E-Print Network [OSTI]

2006. Health effects of fine particu- late air pollution:air pollution in ischemic heart disease patients. Environ Healthair pollution in elderly subjects with a his- tory of coronary artery disease. Environ Health

2010-01-01T23:59:59.000Z

375

Global budgets of oceanic and atmospheric methyl iodide: development of methyl iodide as a tracer for marine convection  

E-Print Network [OSTI]

), wetlands (7 Gg yr \\Gamma1 ) and wood fuel (3 Gg yr \\Gamma1 ) are also included in the model. A global

Jacob, Daniel J.

376

Adenylate pool and radiological tracer studies of the metabolism of micro-metazoans of the sulfide system  

E-Print Network [OSTI]

. The Kruskal-Wallis test revealed no significant differences in distributional patterns between the day and night samples of all species examined. Actual day to day and night to night variability accounted for most of the total sample variance... significantly in the absence of oxygen. With oxygen present, Solenofilomor ha was able to maintain relatively high ATP concentrations regardless of the presence or absence of sulfide (ANOVA, Kruskal Wallis P&. 05). (Figure 2) No significant differences were...

Fox, Catherine Alice

2012-06-07T23:59:59.000Z

377

Thermal single-well injection-withdrawal tracer tests for determining fracture-matrix heat transfer area  

E-Print Network [OSTI]

rates of rocks- to-fluid heat transfer, and thereby thesurface for heat transfer to injected fluids circulating influids, and thereby increase the overall rate of heat transfer

Pruess, K.

2011-01-01T23:59:59.000Z

378

Boron isotope geochemistry as a tracer for the evolution of brines and associated hot springs from the Dead Sea, Israel  

SciTech Connect (OSTI)

A boron isotope study combined with analyses of elemental boron, lithium, and chlorine is used to suggest that brines from the Dead Sea and on-shore hypersaline thermal springs (Hamme Yesha, Hamme Zohar, and Hamme Mazor) are the products of interaction of evaporated seawater with detrital sediments. The high {delta}{sup 11}B values of the Dead Sea brines (55.7 to 57.4{per thousand} versus NBS-951) and the hot springs (52.2 to 55.7{per thousand}), and low B/Li ratios (2.0 to 2.3 and 2.5 to 2.7, respectively), relative to seawater, indicate preferential removal of {sup 10}B from the brines and hence boron adsorption onto clay minerals. The brackish 'En Feshcha springs and the freshwater 'En Dawid and Nahal Arugot springs yield lower B contents and {delta}{sup 11}B values (37.7 to 40.6{per thousand} and 33.8 to 36.9{per thousand}, respectively). The {delta}{sup 11}B values and B contents of diluted Dead Sea brines lie on calculated mixing lines between the composition of the brackish and freshwater springs with the composition of the Dead Sea. The {delta}{sup 11}B values of the hot springs, however, given their boron content, are significantly lower than those of the mixing lines. Thus, waters from the hot springs cannot be a mixing product of the Dead Sea brine with freshwater. Instead, the Dead Sea brine has evolved from the brines of the hot springs through further isotopic fractionation and boron adsorption onto detrital sediments.

Vengosh, A. (Australian National Univ., Canberra (Australia) Hebrew Univ., Jerusalem (Israel)); Starinsky, A.; Kolodny, Y. ( Hebrew Univ., Jerusalem (Israel)); Chivas, A.R. (Australian National Univ., Canberra (Australia))

1991-06-01T23:59:59.000Z

379

Estimates of Tracer-Based Piston-Flow Ages of Groundwater From Selected Sites: National Water-Quality Assessment  

E-Print Network [OSTI]

-Quality Assessment Program, 1992­2005 By Stephen R. Hinkle, Stephanie D. Shapiro, L. Niel Plummer, Eurybiades Busenberg, Peggy K. Widman, Gerolamo C. Casile, and Julian E. Wayland National Water-Quality Assessment materials contained within this report. Suggested citation: Hinkle, S.R., Shapiro, S.D., Plummer, L

380

Climate change in the Pacific North America region over the past millennium : development and application of novel geochemical tracers  

E-Print Network [OSTI]

Barbara Basin Box Core SCB Southern California Bight SCMbasins, sills and islands make up the California Borderland Province, located in the Southern California Bight (

Roach, Lydia Darcy

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tracer prep blanks" 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

ISOTOPES AS TRACERS OF SOURCES OF LEAD AND STRONTIUM IN AEROSOLS (TSP & PM2.5) IN BEIJING  

E-Print Network [OSTI]

-3687" DOI : 10.1016/j.atmosenv.2010.06.036 #12;ABSTRACT Even after its being phased out in gasoline refining plants are the major source of atmospheric lead, followed by thermal power stations and other coal in gasoline. As a consequence of the phasing-out of Pb, the abundance of Pb in troposphere has decreased world

Paris-Sud XI, Université de

382

A study of the distribution of surface active agent on sand by the use of radioactive tracers  

E-Print Network [OSTI]

that a mass sone movement did not exist. The fatty acid constituents of the surfactant were sepax'ated, as chro- matogz. aphic theory would dictate. This effect was neglected by eazliez workers in this field. The smallez' band. s wax e then moved... employed as chemical additives to the flooding water. Prioz" to the utilization of the theory of adsorption in this work, investigatoz s believed that it was necessary to covex the entire sand surface with the chem- ical in order to efficiently lowex...

Little, Jack Edward

2012-06-07T23:59:59.000Z

383

Evaluating Bacteriophage P22 as a Tracer in a Complex Surface Water System: The Grand River, Michigan  

Science Journals Connector (OSTI)

Department of Civil and Environmental Engineering and Department of Fisheries and Wildlife, Michigan State University, East Lansing, Michigan 48824 ... Meanwhile, water temperature, pH, suspended solids, and weather data (i.e., ambient temperature, rainfall, wind, etc.) were noted during sampling. ...

Chaopeng Shen; Mantha S. Phanikumar; Theng T. Fong; Irfan Aslam; Shawn P. McElmurry; Stephanie L. Molloy; Joan B. Rose

2008-02-29T23:59:59.000Z

384

CHANGES IN ALIPHATIC HYDROCARBON TRACER COMPOSITION DURING THE DIGESTIVE PROCESS OF THE MARINE WORM NEREIS VIRENS. PRELIMINARY RESULTS.  

E-Print Network [OSTI]

NEREIS VIRENS. PRELIMINARY RESULTS. F. GILBERT a,b, G. STORA b, G. DESROSIERS a, J-P. GAGNE a, B hydrocarbons to a harsh chemical and active microbiological environment11. If the metabolization of polycyclic

Paris-Sud XI, Université de

385

An inversion technique to retrieve the source of a tracer with an application to synthetic satellite measurements  

Science Journals Connector (OSTI)

...same as that of the satellite. Similarly for the...resolution for both model and satellite is taken as 0.25 for...Centre for Medium-range Weather Forecast (ECMWF...sources and sinks using satellite data: a synthetic inter-comparison...methods for numerical weather prediction. Q. J...

2007-01-01T23:59:59.000Z

386

The Post-Shock Chemical Lifetimes of Outflow Tracers and a Possible New Mechanism to Produce Water Ice Mantles  

E-Print Network [OSTI]

We have used a coupled time-dependent chemical and dynamical model to investigate the lifetime of the chemical legacy left in the wake of C-type shocks. We concentrate this study on the chemistry of H2O and O2, two molecules which are predicted to have abundances that are significantly affected in shock-heated gas. Two models are presented: (1) a three-stage model of pre-shock, shocked, and post-shock gas; and (2) a Monte-Carlo cloud simulation where we explore the effects of stochastic shock activity on molecular gas over a cloud lifetime. In agreement with previous studies, we find that shock velocities in excess of 10 km s^-1 are required to convert all of the oxygen not locked in CO into H2O before the gas has an opportunity to cool. For pure gas-phase models the lifetime of the high water abundances, or ``H2O legacy'', in the post-shock gas is 4 - 7 x 10^5 years. Through the Monte Carlo cloud simulation we demonstrate that the time-average abundance of H2O is a sensitive function of the frequency of shoc...

Bergin, E A; Neufeld, D A; Bergin, Edwin A.; Melnick, Gary J.; Neufeld, David A.

1998-01-01T23:59:59.000Z

387

Continuous measurements of atmospheric argon/nitrogen as a tracer of air-sea heat flux : models, methods, and data  

E-Print Network [OSTI]

bubble injection (Schudlich and Emerson 1996), supersaturation caused by mixing between two water parcels (curvature-induced supersaturation), the stability

Blaine, Tegan Woodward

2005-01-01T23:59:59.000Z

388

Erroneous and inappropriate use of gamma fits to tracer-dilution curves in magnetic resonance imaging and nuclear medicine1  

E-Print Network [OSTI]

imaging and nuclear medicine1 Xingfeng Lia , Jie Tiana , R.K. Millardb, * a Medical Image Processing Group applica- tions of this versatile fitting function occur in nuclear med- icine [2,3], with the same of particles, taking account of back-dispersion in diffusion processes. An up-to-date introduction

Tian, Jie

389

Phosphate oxygen isotope ratios as a tracer for sources and cycling of phosphate in North San Francisco Bay, California  

E-Print Network [OSTI]

and restoration of these ecosystems. [3] Phosphorus (P) is a required element for life and consequently, its is low relative to input and phosphate is not heavily cycled in the ecosystem, the oxygen isotopic.1029/2005JG000079. 1. Introduction [2] Urban and agricultural runoff are major sources of phosphate to aquatic

Paytan, Adina

390

Feasibility of a Perfluorocarbon tracer based network to support Monitoring, Verification, and Accounting of Sequestered CO2  

Science Journals Connector (OSTI)

Carbon capture and sequestration (CCS) will act as a bridging technology necessary to facilitate a transition from fossil fuels to a sustainable energy based economy. The Department of Energy (DOE) target leak rate for sequestration reservoirs is 1% of ...

Thomas B. Watson; Terrence Sullivan

2012-01-03T23:59:59.000Z

391

Tracer testing using naphthalene disulfonate compounds at Soultz-sous-Forts (France) 1 EC Contract ENK5-2000-00301  

E-Print Network [OSTI]

- Location map and profiles of the geothermal wells (from Gentier et al., 2003a and b). Figure 2b - Geological cross-section between the geothermal wells (from Gentier et al., 2003b). The hot fluid produced

Paris-Sud XI, Université de

392

Radionuclides as natural tracers for the characterization of fluids in regional discharge areas, Buda Thermal Karst, Hungary  

E-Print Network [OSTI]

, Nico Goldscheider d , Anita Ã?. Csoma e,1 a Department of Physical and Applied Geology, Institute used uranium, radium and radon to identify mixing of fluids in the Buda Thermal Karst system for the waters. In this study we showed that uranium, radium and radon naturally occurring in groundwater can

Horváth, Ákos

393

UNIVERSITY OF CALIFORNIA, SAN DIEGO Continuous Measurements of Atmospheric Ar/N2 as a Tracer of  

E-Print Network [OSTI]

........................... 31 2.3 Results ................................................. 34 2.3.1 Comparison of station measurements and model predictions ....................... 34 2.3.2 Station-station comparisons ........................................... 74 #12;v 3.2 The seasonal cycle in (Ar/N2): A transient model of air-sea gas flux

Keeling, Ralph

394

Field-Scale Sulfur Hexafluoride Tracer Experiment to Understand Long Distance Gas Transport in the Deep Unsaturated Zone  

Science Journals Connector (OSTI)

...transport from a LLRW disposal area, but no such...was supported by funding from the following...an arid site for disposal of low-level...tuffs from the Yucca Mountain area, Nye County...tritium in arid disposal sites. Water Resour...

Michelle A. Walvoord; Brian J. Andraski; Christopher T. Green; David A. Stonestrom; Robert G. Striegl

395

FOB Homes Typologies  

Science Journals Connector (OSTI)

With mostly blank exterior walls, this prototype is intended for a lot in a typical housing subdivision.

Katsu Umebayashi; Thomas Daniell; Michael Webb; Peter Allison; Kazuhiro Kojima

2005-01-01T23:59:59.000Z

396

C3Bio.org - Usage: PLG_USAGE_TOOLS  

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

What day comes after Tuesday? - Select an answer - Thursday Friday Monday Tuesday Wednesday Please leave this field blank. required Problem...

397

C3Bio.org - Login  

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

Mickey Mouse is a... - Select an answer - Penguin Chicken Suitcase Teapot Mouse Please leave this field blank. required Problem: required...

398

216-Day report for Tank 241-C-111, cores 58 and 59  

SciTech Connect (OSTI)

Three core samples from tank C-111, and a field blank, were received by the 222-S laboratories. Cores 58, 59, and the field blank were analyzed in accordance with plans. A hot cell blank was analyzed at the direction of the hot cell chemist. No sample results exceeded the notification limits. Core 60 was not analyzed.

Rice, A.D.

1994-12-05T23:59:59.000Z

399

Degenerate cadmium oxide films for electronic devices  

Science Journals Connector (OSTI)

Highly conducting and transparent cadmium oxide films have been deposited on Corning 7059 glass substrates by ion-beam sputtering and by spray pyrolysis. The electrical and optical properties of CdO films prep...

T. L. Chu; Shirley S. Chu

400

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture  

E-Print Network [OSTI]

http://occr.christiantimes.org.hk/art_0123.htm 1 Christianity and Culture Jerry Solomon Jerry Solomon field ministries Probe Ministries "Mind Games" College Prep Criswell College University measurement, statistics and methodological studies Cisco Systems PDF PDF html

Yu, Alex

Note: This page contains sample records for the topic "tracer prep blanks" 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

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 ......

402

First wind turbine blade delivered to Pantex | National Nuclear...  

National Nuclear Security Administration (NNSA)

wind turbine blade delivered to Pantex Work crews began to erect the first of five wind turbines that will make up the Pantex Renewable Energy Project (PREP). The first wind...

403

Influence of the Host Matrix on the Microstructure of Sol-Gel Films Doped with CdS and PbS Q-Dots  

Science Journals Connector (OSTI)

The preparation of non-linear optical materials for integrated photonic devices needs the development of procedures which permit a very good control of the microstructure. Sol-gel is a good method for the prep...

A. Martucci; M. Guglielmi; K. Urabe

1998-03-01T23:59:59.000Z

404

E-Print Network 3.0 - aqueous solution complexacao Sample Search...  

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

Genomic DNA Prep protocol Johnston Lab, November 2003 Summary: and PrecipitationResuspension Wash with 150mL Phenol (tris-buffered) Transfer aqueous (top) layer to new...

405

E-Print Network 3.0 - aqueous solutions korroziya Sample Search...  

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

Genomic DNA Prep protocol Johnston Lab, November 2003 Summary: and PrecipitationResuspension Wash with 150mL Phenol (tris-buffered) Transfer aqueous (top) layer to new...

406

E-Print Network 3.0 - aqueous solutions Sample Search Results  

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

Genomic DNA Prep protocol Johnston Lab, November 2003 Summary: and PrecipitationResuspension Wash with 150mL Phenol (tris-buffered) Transfer aqueous (top) layer to new...

407

E-Print Network 3.0 - aqueous solutions issledovanie Sample Search...  

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

Genomic DNA Prep protocol Johnston Lab, November 2003 Summary: and PrecipitationResuspension Wash with 150mL Phenol (tris-buffered) Transfer aqueous (top) layer to new...

408

Equipment Inventory | Sample Preparation Laboratories  

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

Resources Title Equipment Type Facility Laboratory Building Room Accumet Basic AB15 pH meter pH Meter SSRL BioChemMat Prep Lab 2 131 209 Agate Mortar & Pestle Sets Agilent 8453...

409

Analytical Services Mass Spec. Analysis LC/MS and LC/MS/MS Sample Submission Form  

E-Print Network [OSTI]

the analysis. · Label all samples clearly with your name, date and the sample's ID. · You are responsible to this form! Desired Priority: [ ] Standard [ ] Rush Priority Ionization type: [ ] ESI (+) [ ] ESI only #Samples: ____ Priority: ____ #MSn : ____ Sample ID: ____ #Prep: ____ Receive date

Crawford, T. Daniel

410

Sandia National Laboratories: one-pot wash-free process for switchgras...  

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

one-pot wash-free process for switchgrass ionic liquid pretreatment and saccharification One-Pot-to-Prep Biomass for Biofuels On September 10, 2013, in Biofuels, Biomass, Energy,...

411

CO2 please | ornl.gov  

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

CO2 please CO2 please ORNL researchers look to carbon dioxide as a more environmentally friendly refrigerant gas In an indoor research area, Brian Fricke preps display cases for...

412

2013 National Science Bowl Finalists | Department of Energy  

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

3 National Science Bowl Finalists 2013 National Science Bowl Finalists Right now, teams of middle and high school students from across the country are prepping for a weekend of...

413

Proceedings of the TOUGH Symposium 2012  

E-Print Network [OSTI]

geomechan- ics for tight and shale gas reservoirs: materi-Operations in Tight/Shale Gas Systems, in prep. Nassir M.composition changes in shale gas wells Here we investigate

Finsterle, S.

2014-01-01T23:59:59.000Z

414

Recommendations for Improvement of RMP Sediment Monitoring  

E-Print Network [OSTI]

, OR Prepared For Regional Monitoring Program for Trace Substances San Francisco Estuary Institute 1325 S. 46th in the Atlas of Sediment Contamination, Toxicity, and Benthic Assemblages (Thompson and Daum, in prep.). #12

415

2002 - 02 | Jefferson Lab  

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

February 2002 Sun, 02102002 - 12:00am Kids Display Smarts at Science Bowl (Daily Press) Sat, 02092002 - 12:00am Students Prep for Super Bowl of the Mind...

416

E-Print Network 3.0 - atheriniformes atherinopsidae na Sample...  

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

(RS; bp), number of alleles (NA), average observed heterozygosity (HO), and average FIS and FST... This study Primer Sequence (5-3; Feldheim et al. in prep.) TA (C) RN RS...

417

Page 1 of 2 Radiogram No. 8657nu Form 24 for 03/11/2012 (Updated)  

E-Print Network [OSTI]

Supply System (SVO), POTOK Air Purification System Data Calldowns 15:15-16:05 FE-5 ICV Monitoring Prep 15 Progress 414 Section 1 (terminate) 14:05-14:45 FE-2 Maintenance. SM and FGB Flush Counter (), Water

418

TheChandraViewofRadiativeandKineticEnergyDissipationinAGN Dan Evans (MIT Kavli Institute / Harvard University), Julia Lee (Harvard), Jane Turner  

E-Print Network [OSTI]

jets are launched? Are there intrinsic differences in the accretion process? m LX #12;The-ks HETG GTO observation (PI Canizares) just performed (Evans et al., in prep.) Ogleetal.(2003) 20

Evans, Dan

419

On the Evolution of Massive Galaxies  

E-Print Network [OSTI]

MNRAS, 386, 577 Falc´on-Barroso, J. et al. 2004, MNRAS, 350,home to me. Jes´ us Falc´on Barroso deserves special mentionoptical colors (Falc´on-Barroso et al. in prep). These star-

Shapiro, Kristen Leah

2010-01-01T23:59:59.000Z

420

U.S. Department of Energy Categorical Exclusion ...  

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

Characterization of SCO Sludge, Supernate, and Glass for Tank Farm Return Savannah River Site AikenAikenSouth Carolina Samples and High Level waste will be combined, prepped, and...

Note: This page contains sample records for the topic "tracer prep blanks" 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

CX-010027: Categorical Exclusion Determination | Department of...  

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

Exclusion Determination CX-010027: Categorical Exclusion Determination Removal of Glass Feed Prep System from 786-A (EDL) CX(s) Applied: B1.23 Date: 01222013 Location(s):...

422

2011 - 04 | Jefferson Lab  

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

April 2011 Tue, 04262011 - 1:00pm Harris Power Earns Jefferson Lab's Top Small Business Award for 2010 Wed, 04202011 - 1:00pm Students Use JLab Website to Prep for Virginia...

423

Whats Inside: Undeliverable Campus  

E-Print Network [OSTI]

to personnel who deal with potentially fraudulent activities. The Certified Fraud Examiner (CFE) exam review sessions are designed for participants to complete the CFE exam prep course and to review for the four

Veiga, Pedro Manuel Barbosa

424

A model for predicting the costs of research and development in the Post Office Department  

E-Print Network [OSTI]

Bundle Sorting Machine Parcel Post Sorter Letter Sorting Machine Speech Translator LSM Cancellor Sweeping Equipment Mail Prep Line Automated Post Office Packaging of Letter Mail Sack Label Printer Cancellation Die Device Power and Free Conveyor... Bundle Sorting Machine Parcel Post Sorter Letter Sorting Machine Speech Translator LSM Cancellor Sweeping Equipment Mail Prep Line Automated Post Office Packaging of Letter Mail Sack Label Printer Cancellation Die Device Power and Free Conveyor...

Watts, David Eli

2012-06-07T23:59:59.000Z

425

Comparison of Wind-Models for Real Time Dispersion Simulation of Tracer Experiments Conducted Over Complex Terrain During Weak Flow Conditions  

Science Journals Connector (OSTI)

The radiological assessment during the early and intermediate phase of an accident, in case of radioactive emissions, is an important tool for emergency decision making. The development and evaluation of adequ...

Volker R. D. Herrnberger…

1992-01-01T23:59:59.000Z

426

Natural Tracers and Multi-Scale Assessment of Caprock Sealing Behavior: A Case Study of the Kirtland Formation, San Juan Basin  

SciTech Connect (OSTI)

The assessment of caprocks for geologic CO{sub 2} storage is a multi-scale endeavor. Investigation of a regional caprock - the Kirtland Formation, San Juan Basin, USA - at the pore-network scale indicates high capillary sealing capacity and low permeabilities. Core and wellscale data, however, indicate a potential seal bypass system as evidenced by multiple mineralized fractures and methane gas saturations within the caprock. Our interpretation of {sup 4}He concentrations, measured at the top and bottom of the caprock, suggests low fluid fluxes through the caprock: (1) Of the total {sup 4}He produced in situ (i.e., at the locations of sampling) by uranium and thorium decay since deposition of the Kirtland Formation, a large portion still resides in the pore fluids. (2) Simple advection-only and advection-diffusion models, using the measured {sup 4}He concentrations, indicate low permeability ({approx}10-20 m{sup 2} or lower) for the thickness of the Kirtland Formation. These findings, however, do not guarantee the lack of a large-scale bypass system. The measured data, located near the boundary conditions of the models (i.e., the overlying and underlying aquifers), limit our testing of conceptual models and the sensitivity of model parameterization. Thus, we suggest approaches for future studies to better assess the presence or lack of a seal bypass system at this particular site and for other sites in general.

Jason Heath; Brian McPherson; Thomas Dewers

2011-03-15T23:59:59.000Z

427

Assessment of source contributions to air pollution in Beirut, Lebanon: a comparison of source-based and tracer-based modeling approaches  

Science Journals Connector (OSTI)

Air pollution in Beirut, Lebanon, is a severe...2009; Waked et al. 2013a). In particular, fine particulate matter (PM2.5) concentrations are typically on the order of 20 ?g/m3 (Waked et al. 2013b), thereby exceed...

Antoine Waked; Charbel Afif; Christian Seigneur

2014-10-01T23:59:59.000Z

428

Tracer Penetration into Welded Tuff Matrix from Flowing Fractures Qinhong Hu,* Timothy J. Kneafsey, Robert C. Trautz, and Joseph S. Y. Wang  

E-Print Network [OSTI]

imbibition and penetration into unsaturated, fractured rock matrix at Yucca Mountain, Nevada. Field. The objective of a direct application to radionuclide transport at Yucca Mountain, and this study Facility (ESF), an under- evidence, however, points to the occurrence of fast and ground tunnel at Yucca

Hu, Qinhong "Max"

429

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

Tubbs, and H. E. Gove, Thermonuclear 36 Cl pulse in naturalTubbs, and H. E. Gove, Thermonuclear 36 Cl pulse in naturalfrom above-ground thermonuclear weapons testing, similar to

Shaw, Glenn David

2009-01-01T23:59:59.000Z

430

Investigating groundwater and surface water interactions using novel isotopes and geochemical tracers in the upper Merced River Basin, Sierra Nevada, California  

E-Print Network [OSTI]

48 Measured electrical conductivity vs. predicted electricalFigure 2.8: Measured electrical conductivity vs. predicted

Shaw, Glenn David

2009-01-01T23:59:59.000Z

431

{sup 234}Th and {sup 7}Be as tracers for the transport and dynamics of suspended particles in a partially mixed estuary  

SciTech Connect (OSTI)

The sources of the natural radionuclides {sup 234}Th (half-life = 24 d) and {sup 7}Be (half-life = 53 d) to the partially mixed Hudson River estuary are distinctly different: {sup 234}Th is produced from decay of dissolved {sup 238}U that varies conservatively as a function of salinity, and {sup 7}Be is added directly from the atmosphere. {sup 234}Th and {sup 7}Be activities were measured in suspended and bottom sediments under varying conditions of river flow to evaluate the relative importance of local sediment resuspension and advection of suspended sediments through the estuary. Both radionuclides are removed from the estuarine water column on time scales of from <1 to 13 d. The {sup 234}Th{sub xs}/{sup 7}Be activity ratio is used to eliminate variations in the specific activities caused by grain size or sediment compositional changes. A simple steady-state model is used to set limits on the activity ratios expected if local processes (in situ production of {sup 234}Th, atmospheric supply of {sup 7}Be, scavenging, particle settling, and resuspension) dominate the activity ratio. During low river discharge, observed {sup 234}Th{sub xs}/{sup 7}Be ratios exceed the model upper limits in the higher salinity portions of the estuary, suggesting that particles labeled with Th and Be in higher salinities are transported to lower salinities with the estuarine circulation. Distance scales of particle transport are estimated to be from 10 to 20 km, comparable to the tidal excursion. Sampling during a high-flow event of short duration shows that the activity ratios tend toward the lower limit. Such a pattern could be produced by down-river transport of particles or by enhanced suspension. Similarities between the {sup 234}Th{sub xs}/{sup 7}Be activity ratios of suspended and bottom sediments suggest that increases in resuspension during high flow events dominate the activity ratio in the suspended sediment reservoir.

Feng, H.; Cochran, J.K.; Hirschberg, D.J.

1999-09-01T23:59:59.000Z

432

Evaluation of C-14 as a natural tracer for injected fluids at theAidlin sector of The Geysers geothermal system through modeling ofmineral-water-gas Reactions  

SciTech Connect (OSTI)

A reactive-transport model for 14C was developed to test its applicability to the Aidlin geothermal system. Using TOUGHREACT, we developed a 1-D grid to evaluate the effects of water injection and subsequent water-rock-gas interaction on the compositions of the produced fluids. A dual-permeability model of the fracture-matrix system was used to describe reaction-transport processes in which the permeability of the fractures is many orders of magnitude higher than that of the rock matrix. The geochemical system included the principal minerals (K-feldspar, plagioclase, calcite, silica polymorphs) of the metagraywackes that comprise the geothermal reservoir rocks. Initial simulation results predict that the gas-phase CO2 in the reservoir will become more enriched in 14C as air-equilibrated injectate water (with a modern carbon signature) is incorporated into the system, and that these changes will precede accompanying decreases in reservoir temperature. The effects of injection on 14C in the rock matrix will be lessened somewhat because of the dissolution of matrix calcite with ''dead'' carbon.

Dobson, Patrick; Sonnenthal, Eric; Lewicki, Jennifer; Kennedy, Mack

2006-06-01T23:59:59.000Z

433

Fluid origins, paths, and fluid-rock reactions at convergent margins, using halogens, Cl stable isotopes, and alkali metals as geochemical tracers  

E-Print Network [OSTI]

Carbonate chimneys with brucite, blue amphiboles, phengite,partition coefficients. One brucite sample separated from ahigh ? 37 Cl value in the brucite separate sample probably

Wei, Wei

2007-01-01T23:59:59.000Z

434

Development of an Optimum Tracer Set for Apportioning Emissions of Individual Power Plants Using Highly Time-Resolved Measurements and Advanced Receptor Modeling  

SciTech Connect (OSTI)

In previous studies, 11 elements (Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Se, and Zn) were determined in 30-minute aerosol samples collected with the University of Maryland Semicontinuous Elements in Aerosol Sampler (SEAS; Kidwell and Ondov, 2001, 2004; SEAS-II) in several locations in which air quality is influenced by emissions from coal- or oil-fired power plants. At this time resolution, plumes from stationary high temperature combustion sources are readily detected as large excursions in ambient concentrations of elements emitted by these sources (Pancras et al. ). Moreover, the time-series data contain intrinsic information on the lateral diffusion of the plume (e.g., {sigma}{sub y}), which Park et al. (2005 and 2006) have exploited in their Pseudo-Deterministic Receptor Model (PDRM), to calculate emission rates of SO{sub 2} and 11 elements (mentioned above) from four individual coal- and oil-fired power plants in the Tampa Bay area. In the current project, we proposed that the resolving power of source apportionment methods might be improved by expanding the set of maker species and that there exist some optimum set of marker species that could be used. The ultimate goal was to determine the utility of using additional elements to better identify and isolate contributions of individual power plants to ambient levels of PM and its constituents. And, having achieved better resolution, achieve, also, better emission rate estimates. In this study, we optimized sample preparation and instrumental protocols for simultaneous analysis of 28 elements in dilute slurry samples collected with the SEAS with a new state-of-the-art Thermo-Systems, Inc., X-series II, Inductively Coupled Plasma Mass Spectroscopy (ICP-MS), and reanalyzed the samples previously collected in Tampa during the modeling period studied by Park et al. (2005) in which emission rates from four coal- and oil-fired power plants affected air quality at the sampling site. In the original model, Park et al. (2005), included 6 sources. Herein, we reassessed the number of contributing sources in light of the new data. A comprehensive list of sources was prepared and both our Gaussian Plume model and PMF were used to identify and predict the relative strengths of source contributions at the receptor sites. Additionally, PDRM was modified to apply National Inventory Emissions, Toxic Release Inventory, and Chemical Mass Balance source profile data to further constrain solutions. Both the original Tampa data set (SO{sub 2} plus 11 elements) and the new expanded data set (SO{sub 2} plus 23 elements) were used to resolve the contributions of particle constituents and PM to sources using Positive Matrix Factorization (PMF) and PDRM.

John Ondov; Gregory Beachley

2007-07-05T23:59:59.000Z

435

Sensitivity of the Simulated Distributions of Water Masses, CFCs, and Bomb 14C to Parameterizations of Mesoscale Tracer Transports in a Model of the North Pacific  

Science Journals Connector (OSTI)

A basinwide ocean general circulation model of the North Pacific Ocean is used to study the sensitivity of the simulated distributions of water masses, chlorofluorocarbons (CFCs), and bomb carbon-14 isotope (14C) to parameterizations of mesoscale ...

Yongfu Xu; Shigeaki Aoki; Koh Harada

2006-03-01T23:59:59.000Z

436

The relative importance of autotrophic and heterotrophic nitrification in a conifer forest soil as measured by 15N tracer and pool dilution techniques  

Science Journals Connector (OSTI)

The importance of heterotrophic nitrification was studied in soil from a mixed-conifer forest. Three sites in the forest were sampled: a clear cut area, ... h-1). In the young and mature forested sites, gross nit...

Henning Pedersen; Kristie A. Dunkin; Mary K. Firestone

1999-02-01T23:59:59.000Z

437

The relative importance of autotrophic and heterotrophic nitrification in a conifer forest soil as measured by15N tracer and pool dilution techniques  

Science Journals Connector (OSTI)

The importance of heterotrophic nitrification was studied in soil from a mixed-conifer forest. Three sites in the forest were sampled: a clear cut area,...15NH 4 + ...

Henning Pedersen; Kristie A. Dunkin; Mary K. Firestone

1999-02-01T23:59:59.000Z

438

Characterization of volatile organic compounds (VOCs) in Asian and north American pollution plumes during INTEX-B: identification of specific Chinese air mass tracers  

E-Print Network [OSTI]

1,2-DCE), ethane, ethyne, propane, butanes, i-pentane, andDCE Ethane Ethene Ethyne Propane i-Butane n-Butane i-PentaneDCE Ethane Ethene Ethyne Propane i-Butane n-Butane i-Pentane

2009-01-01T23:59:59.000Z

439

INL Executable Plan  

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

ID-11383 ID-11383 Revision 2 INL FY 2011 Site Sustainability Plan with the FY 2010 Annual Report December 2010 (This Page Intentionally Left Blank) DOE/ID-11383 Revision 2 INL FY 2011 Site Sustainability Plan with the FY 2010 Annual Report December 2010 Prepared for the U.S. Department of Energy DOE Idaho Operations Office (This Page Intentionally Left Blank) (This Page Intentionally Left Blank) (This Page Intentionally Left Blank) (This Page Intentionally Left Blank) INL FY 2011 Site Sustainability Plan with the FY 2010 Annual Report DOE/ID-11383 Revision 2 December 2010 Approved By: ~~~/ Jeffrey~USseau Fa~ 7 Dlte President and General Manager , - Bechtel BWXT Idaho, LLC Advanced Mixed Waste Treatment Project (This Page Intentionally Left Blank)

440

Microsoft Word - S08400_2012_MVP_5yrRev.doc  

Office of Legacy Management (LM)

Fourth Five-Year Review Report Fourth Five-Year Review Report For Monticello Radioactively Contaminated Properties Superfund Site San Juan County Monticello, Utah June 2012 LMS/MNT/S08400 This page intentionally left blank June 18, 2012 This page intentionally left blank This page intentionally left blank U.S. Department of Energy Fourth Five-Year Review Report for MVP June 2012 Doc. No. S08400 Page i Contents Abbreviations ................................................................................................................................. iii Executive Summary .........................................................................................................................v 1.0 Introduction ..........................................................................................................................1

Note: This page contains sample records for the topic "tracer prep blanks" 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

Propellers and windmills  

SciTech Connect (OSTI)

The present invention provides a propeller or windmill blank comprising a planar sheet of material having markings defining, or being shaped to have, a central or hub region and two blades extending in opposite directions along imaginary lines; and wherein the blank has a marking or line of preferential folding inclined to the first mentioned lines which, when the blank is bent therealong, will result in pitch being applied to the blades.

Newnham, J.H.

1983-04-12T23:59:59.000Z

442

The Texas Herd Sire Evaluation Program.  

E-Print Network [OSTI]

[Blank Page in Original Bulletin] F THSP FORM 1 THE TEXAS HERD SIRE EVALUATION PROGRAM Name Sire name i Address-- No.- Acceptable Reproductive ability Scc I Natural service ore 40 male calves Growing and fattening 205-day weights...-1098 Healthy Stocker and Feeder Calves B-924 Testing Bulls for Fertility 8-1077 Determining Pregnancy in Cattle MP-947 Costs and Returns of Cow-Calf Operations MP-956 Keys to Profitable ow-Calf Operations [Blank Page in Original Bulletin] [Blank Page...

Maddox, L. A. Jr.

1970-01-01T23:59:59.000Z

443

Seal for fluid forming tools  

DOE Patents [OSTI]

An electro-hydraulic forming tool for forming a sheet metal blank in a one-sided die has first and second rigid rings that engage opposite sides of a sheet metal blank. The rigid rings are contained within slots on a die portion and a hydraulic force applicator portion of the forming tool. The seals are either resiliently biased by an elastomeric member or inherently resiliently biased into contact with the blank.

Golovashchenko, Sergey Fedorovich (Beverly Hills, MI); Bonnen, John Joseph Francis (Milford, MI)

2012-03-20T23:59:59.000Z

444

Evaluation of Quality-Assurance/Quality-Control Data Collected by the U.S. Geological Survey from Wells and Springs between the Southern Boundary of the Idaho National Engineering and Environmental Laboratory and the Hagerman Area, Idaho, 1989 through 1995  

SciTech Connect (OSTI)

The U.S. Geological (USGS) and the Idaho Department of Water Resources, in cooperation with the U.S. Department of Energy, collected and analyzed water samples to monitor the water quality of the Snake River Plain aquifer from the southern boundary of the Idaho National Engineering and Environmental Laboratory to the Hagerman area, Idaho. Concurrently, replicate samples and blank samples were collected and analyzed as part of the quality-assurance/quality-control program. Samples were analyzed from inorganic constituents, gross radioactivity and radionuclides, organic constituents, and stable isotopes. To evaluate the precision of field and laboratory methods, analytical results of the water-quality and replicate samples were compared statistically for equivalence on the basis of the precision associated with each result. Statistical comparisons of the data indicated that 95 percent of the results of the replicate pairs were equivalent. Blank-sample analytical results indicated th at the inorganic blank water and volatile organic compound blank water from the USGS National Water Quality Laboratory and the distilled water from the Idaho Department of Water Resources were suitable for blanks; blank water from other sources was not. Equipment-blank analytical results were evaluated to determine if a bias had been introduced and possible sources of bias. Most equipment blanks were analyzed for trace elements and volatile organic compounds; chloroform was found in one equipment blank. Two of the equipment blanks were prepared after collection and analyses of the water-quality samples to determine whether contamination had been introduced during the sampling process. Results of one blank indicated that a hose used to divert water away from pumps and electrical equipment had contaminated the samples with some volatile organic compounds. Results of the other equipment blank, from the apparatus used to filter dissolved organic carbon samples, indicated that the filtering apparatus did not affect water-quality samples.

Williams, L.M.; Bartholomay, R.C.; Campbell, L.J.

1998-10-01T23:59:59.000Z

445

CRITICALITY SAFETY QUALIFICATION STANDARD REFERENCE GUIDE  

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

Criticality Criticality Safety Qualification Standard Reference Guide APRIL 2011 This page is intentionally blank. Table of Contents i FIGURES ...................................................................................................................................... iii PURPOSE ...................................................................................................................................... 1 SCOPE ........................................................................................................................................... 1 PREFACE ...................................................................................................................................... 1 ACKNOWLEDGEMENTS ......................................................................................................... 2

446

Fact or artifact: the representativeness of ESIMS for complex...  

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

2, potential dimers were distinguished from the other unrepresentative ions and colored green. Peaks also present in corresponding blanks were not considered. Mixes 1-7...

447

September 2004 Water Sampling  

Office of Legacy Management (LM)

Report Attachment 2-Data Presentation Groundwater Quality Data Surface Water Quality Data Natural Gas Analysis Data Equipment Blank Data Time-Concentration Graphs Attachment...

448

E-Print Network 3.0 - aerospace safety advisory Sample Search...  

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

SAFETY ADVISORY PANEL ANNUAL REPORT FOR 2010 12;THIS PAGE INTENTIONALLY BLANK 12;NASA... AEROSPACE SAFETY ADVISORY PANEL National Aeronautics and Space Administration...

449

E-Print Network 3.0 - analytical methods flambagem Sample Search...  

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continuous calibration verification for analytical instruments use of method blanks... procedures, and NOAA's Analytical Quality Assurance Project Plan (QAPP). Samples were sent...

450

C3Bio.org - Usage: PLG_USAGE_TOOLS  

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Where does the sun rise? - Select an answer - Chickens At night In the South In the West In the East Please leave this field blank. required Problem...

451

Computer Help Request  

E-Print Network [OSTI]

If you do not have a Math computer account, leave this blank. Your name. Email Address. Confirm Email Address. Room Number. Printer Name. Printer Location

452

C3Bio.org - Resources: High pressure catalytic hydrodeoxygenation...  

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453

C3Bio.org - Wiki: Help: Wiki Html  

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454

C3Bio.org - Login  

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Japan Egypt The North Pole Rocks Canada Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

455

C3Bio.org - Members: View: Jeremy Madden  

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456

C3Bio.org - Tags: pending core update  

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457

C3Bio.org - Resources: Nanostructured Heterogeneous Catalysts...  

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458

C3Bio.org - Tags: Coursework Writing Service  

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459

C3Bio.org - Resources: DOE Attribution for Publications/Presentations  

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460

C3Bio.org - Tags: dsfzv  

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Note: This page contains sample records for the topic "tracer prep blanks" 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

C3Bio.org - Resources: C3Bio Multidisciplinary Award for Research...  

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462

C3Bio.org - Members: View: Alison Buchan  

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463

C3Bio.org - Group: Database for Metabolic Labeling of Plants  

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464

C3Bio.org - Knowledge Base: Tips: How to use WebDAV to access...  

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The North Pole Canada Japan Rocks Egypt Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

465

C3Bio.org - Tags: hydropyrolysis  

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Japan Canada Rocks The North Pole Egypt Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

466

C3Bio.org - Tags: Browse  

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467

C3Bio.org - Tags: hydropyrolysis  

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Egypt Japan Canada Rocks The North Pole Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

468

C3Bio.org - Wish List - c3bio.org  

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Egypt Japan Canada Rocks The North Pole Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

469

C3Bio.org - Knowledge Base: Tools: Signed Applet  

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470

C3Bio.org - Feedback: Poll  

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471

C3Bio.org - Resources: Workshops  

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472

C3Bio.org - Resources: No Carbon Left Behind  

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473

C3Bio.org - Members: View: Ilya Shunko  

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474

C3Bio.org - Tags: flyknittraineruk.co.uk/nike-flyknit-trainer...  

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475

C3Bio.org - Members: View: Charles VBernal  

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The Great Pyramid is found in... - Select an answer - Canada Rocks Japan The North Pole Egypt Please leave this field blank. required Problem: required Attach a screenshot:...

476

C3Bio.org - Members: View: Jan Werner  

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477

C3Bio.org - Members: View: Louis Sherman  

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478

C3Bio.org - Members: View: Kasiviswanathan Muthukumarappan  

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479

C3Bio.org - Resources: GC VI 2  

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The North Pole Japan Rocks Egypt Canada Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

480

C3Bio.org - Support: Tickets: New  

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

The Great Pyramid is found in... - Select an answer - Japan Egypt Canada Rocks The North Pole Please leave this field blank. required Problem: required Attach a screenshot:...

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


481

Annual Performance Report  

Office of Legacy Management (LM)

left blank U.S. Department of Energy Annual Performance Report, Shiprock, New Mexico October 2014 Doc. No. S12021 Page i Contents Abbreviations ......

482

C3Bio.org - Wiki: About Wiki Pages  

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483

C3Bio.org - Tags: wireless mouse  

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484

C3Bio.org - Members: View: Matt Hurt  

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485

C3Bio.org - Members: View: Chris Staiger  

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486

C3Bio.org - Resources: Tools  

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487

C3Bio.org - Members: View: Michael B. Lakeman  

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488

C3Bio.org - Members: View: Jessica TBinkley  

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489

C3Bio.org - Resources: C3Bio Award for Research - Transformative  

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490

C3Bio.org - Login  

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

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491

C3Bio.org - Resources: Series  

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492

C3Bio.org - Members: View: othyeiow othyeiow othyeiow  

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Japan Egypt The North Pole Rocks Canada Please leave this field blank. required Problem: required Attach a screenshot: optional (.jpg, .jpeg, .jpe, .bmp, .tif, .tiff, .png, .gif)...

493

C3Bio.org - Tags: metabolic labeling  

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494

C3Bio.org - Events: 2013/12/13: Week of 13  

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495

C3Bio.org - Members: View: Chris Staiger  

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496

C3Bio.org - Members: View: Jessica Lynn Henty  

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497

C3Bio.org - Members: View: Hideyo Inouye  

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498

C3Bio.org - Members: View: Soonju Park  

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499

C3Bio.org - Members: View: Padmaja Narra  

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500

C3Bio.org - Events: 2013/12/01  

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