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Environment

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Displaying 726 - 750 of 1014

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

Determination of non-ortho Polychlorinated Biphenyls in Environmental Standard Reference Materials

June 1, 2000

Author(s)

W. W. Brubaker, Michele M. Schantz, Stephen Wise

NIST/NOAA NS&T Intercomparison Exercise Program for Organic Contaminants in the Marine Environment Description and Results of 1999 Organic Intercomparison Exercises

June 1, 2000

Author(s)

Michele M. Schantz, Reenie M. Parris, Stephen A. Wise

Recertification of Standard Reference Material (SRM) 1649, Urban Dust, for the Determination of Polycyclic Aromatic Hydrocarbons (PAHs)

April 1, 2000

Author(s)

Stephen A. Wise, Lane C. Sander, Michele M. Schantz, M. J. Hays, Bruce A. Benner Jr

Standard Reference Materials for the Determination of Trace Organic Constituents in Environmental Samples

March 1, 2000

Author(s)

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

An Extended Corresponding State Model for the Thermal Conductivity of Refrigerants and Refrigerant Mixtures

January 1, 2000

Author(s)

Mark O. McLinden, S Klein, Richard A. Perkins

The extended corresponding states (ECS) model of Huber et al. (Huber, M.L., Friend, D.G., Ely, J.F. Prediction of the thermal conductivity of refrigerants and refrigerant mixtures.

Transport Properties of Refrigerants R32, R125, R134a, and R125+R32 Mixtures in and Beyond the Critical Region

January 1, 2000

Author(s)

S B. Kiselev, Richard A. Perkins, Marcia L. Huber

A practical representation for the transport coefficients of pure refrigerants R32, R125, R134a, and R125 + R32 mixtures is presented which is valid in the vapor-liquid critical region.

Accurate Determination of Trace Elements in Sediment CRMs by Instrumental Neutron Activation Analysis

December 1, 1999

Author(s)

D. A. Becker

Alaska Harbor Seal Phoca vitulina Contaminants: A Review with Annotated Bibliography

December 1, 1999

Author(s)

S Papa r, P R. Becker

Certification of a Diesel Particulate Related Standard Reference Material (SRM 1975) for PAHs

December 1, 1999

Author(s)

Dianne L. Poster, M. J. Lopez de Alda, Michele M. Schantz, Lane C. Sander, M. G. Vangel, Stephen A. Wise

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