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Environment

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Displaying 376 - 400 of 537

National Biomonitoring Specimen Bank NIST-Charleston Laboratory: Clean Room and Specimen Bank Protocols

January 1, 2002

Author(s)

Rebecca S. Pugh, Barbara J. Porter, Paul R. Becker, Stephen A. Wise

Development of an Upset Early Warning Device to Predict Defloculation Events

November 1, 2001

Author(s)

R. F. Wimmer, E. Waddell, S. L. Barker, A. Suggs, Laurie E. Locascio, B. J. Love, N. G. Love

Method for Estimating Mixture Equation of State Parameters

November 1, 2001

Author(s)

Eric W. Lemmon, Mark O. McLinden

A predictive method for estimating the zij parameter in the mixture model of Lemmon and Jacobsen [Int. J. Thermophysics 20:1629 (1999)] has been developed. Data for 76 binary pairs have been used in the development of this method, and these data are

Solubility of Capsaicin and B-Carotene in Supercritical Carbon Dioxide and in Halocarbons

September 1, 2001

Author(s)

B N. Hansen, Allan H. Harvey, J P. Coelho, M F. Palavra, Thomas J. Bruno

We measured the solubilities of Β-carotene and capsaicin in supercritical carbon dioxide, and also in difluoromethane (R-32) and 1,1,1,2-tetrafluoroethane (R-134a) in the liquid phase at temperatures near and somewhat below their critical points. Β

The development and certification of Standard Reference Materials (SRMs) to assess and ensure accurate measurement of Pb in the environment

August 1, 2001

Author(s)

John D. Fassett, Bruce S. MacDonald

Heavy Metals and Other Trace Elements Measured in Tissues of Marine Mammals Archived by the Alaska Marine Mammal Tissue Archival Project from the Bering Sea and Cook Inlet, Alaska

June 1, 2001

Author(s)

Paul R. Becker, Elizabeth A. Mackey, R. Demiralp, Michael S. Epstein, M K. Donais, W. A. Goessler, Barbara J. Porter, Stephen A. Wise

Persistent Chlorinated Compounds and Elements in Tissues of Cook Inlet Beluga Whales, Delphinapterus leucas, Banked by the Alaska Marine Mammal Tissue Archival Project

June 1, 2001

Author(s)

Paul R. Becker, Rebecca S. Pugh, Michele M. Schantz, Elizabeth A. Mackey, R. Demiralp, Michael S. Epstein, M K. Donais, Barbara J. Porter, Stephen A. Wise, B. A. Mahoney

Seabird Tissue Archival and Monitoring Project: Protocols for Collecting and Banking Seabird Eggs

June 1, 2001

Author(s)

G.W. York, Barbara J. Porter, Rebecca Pugh, D. G. Roseneau, K. S. Simac, Paul R. Becker, Stephen Wise

Detection and Quantification Capabilities for 85 Kr with the NIST Low-Level Gas Counting System: Impacts of Instrumental and Environmental Backgrounds

April 1, 2001

Author(s)

Lloyd A. Currie, George A. Klouda

Among the most important, conservative geochemical tracers are the long-lived isotopes of krypton, 81Kr and 85Kr. Following a very brief review of the metrology and applications of these two radionuclides, we focus on the low-level measurement the 10.8

NIST-JANAF Thermochemical Tables. I. Ten Organic Molecules Related to Atmospheric Chemistry

April 1, 2001

Author(s)

O Dorofeeva, V Novikov, Dan A. Neumann

The structural, spectroscopic, and thermodynamic properties of ten organic molecules in the gas phase, including three peroxides and four carboxylic acids, have been reviewed. The calculation of the thermochemical tables involved the critical evaluation of

Sea Turtle Contaminants: A Review with Anotated Bibliography

April 1, 2001

Author(s)

Rebecca S. Pugh, Paul R. Becker

Certification of the Methylmercury Content in SRM 2977 Mussel Tissue (Organic Contaminants and Trace Elements) and SRM 1566b Oyster Tissue

February 1, 2001

Author(s)

S. Tutschku, Michele M. Schantz, M. Horvat, M. Logar, H. Akagi, Hendrik Emons, M. S. Levenson, Stephen Wise

Determination of Polychlorinated Dibenzo-p-Dioxin and Dibenzofuran Congeners in Air Particulate and Marine Sediment Standard Reference Materials (SRMs)

February 1, 2001

Author(s)

C. H. Chiu, R. Turle, G. Poole, B. Thibert, W. W. Brubaker, Michele M. Schantz, Stephen Wise

Supercritical Fluid Extraction of Organics in Environmental Analysis

January 1, 2001

Author(s)

Bruce A. Benner Jr.

Determination of PAHs in Combustion-related Samples and in SRM 1597, Complex Mixture of PAHs from Coal Tar

December 1, 2000

Author(s)

Dianne L. Poster, M. J. Lopez de Alda, Stephen A. Wise, J. C. Chuang, J. L. Mumford

Recent Developments in Standard Reference Materials for Polycyclic Aromatic Hydrocarbons in Environmental Matrices

December 1, 2000

Author(s)

Stephen A. Wise, Bruce A. Benner Jr, M. J. Lopez de Alda, Dianne L. Poster, Lane C. Sander, Michele M. Schantz

Stability of Polycyclic Aromatic Hydrocarbons in Frozen Mussel Tissue

December 1, 2000

Author(s)

Michele M. Schantz, Barbara J. Porter, Stephen A. Wise

Low-Level (Submicromole) Environmental 14 C Metrology

October 1, 2000

Author(s)

Lloyd A. Currie, J D. Kessler, J V. Marolf, A. P. McNichol, D R. Stuart, J C. Donoghue, D. J. Donahue, William Burr, D Biddulph

Accelerator Mass Spectrometry (AMS) measurements of environmental 14C have been employed during the past decade at the several micromole level (10's of ug carbon), but advanced research in the atmospheric and marine sciences demands still higher

Henry's Law Constants of Polychlorinated Biphenyl Congeners and Their Variation with Temperature

September 23, 2000

Author(s)

H. A. Bamford, Dianne L. Poster, J E. Baker

Isotopic ( 14 C) and Chemical Composition of Atmospheric Volatile Organic Compounds-Precursors to Ozone

September 1, 2000

Author(s)

George A. Klouda, C. W. Lewis, R A. Rasmussen, D C. Stiles, W D. Ellenson, J L. Marolf, R. K. Stevens

Atmospheric volatile organic compounds (VOCs) are an important factor in the production of ozone near ground level [3]. Many hydrocarbons origanate from auto exhaust. However, a number of VOCs e.g., isoprene, are known to be natural in origin. To develop

Concentrations of Polychlorinated Biphenyls (PCB's), Chlorinated Pesticides, and Heavy Metals and Other Elements in Tissues of Belugas, Delphinapterus leucas, from Cook Inlet, Alaska,

July 1, 2000

Author(s)

Paul R. Becker, M.M. Krahn, Elizabeth A. Mackey, Rabia Oflaz, Michele M. Schantz, Michael Epstein, M.K. Donais, Barbara J. Porter, D.C.G. Muir, Stephen A. Wise