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Chemistry

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Displaying 1376 - 1400 of 1924

Elemental and Molecular Imaging of Human Hair Using Secondary Ion Mass Spectrometry

April 1, 1999
Author(s)
John G. Gillen, S V. Roberson, C M. Ng, M Stranick
Secondary ion mass spectrometry (SIMS) is used to image the spatial distribution of elemental and molecular species on the surface and in cross-sections of doped human hair using a magnetic sector SIMS instrument operated as an ion microprobe. Analysis of

Recent History and Future Challenges of 14 C Aerosol Research

February 1, 1999
Author(s)
Lloyd A. Currie
A review is given of some critical events in the development 14C aerosol science, and the profound influence of 14C accelerator mass spectrometry on its current applications and future prospects. The birth of this discipline occurred shortly after the

SO x Radical Monoanions--Reactions in Solution and in the Gas Phase

February 1, 1999
Author(s)
Robert E. Huie, L W. Sieck
Sulfur dioxide, SO 2, is a major air pollutant and a natural trace atmospheric constituent. The major anthropogenic source of SO 2 is the combustion of fossil fuels, although much also arises from scrubbing natural gas and from smelting sulfide ores (1)

Technical Activities 1998-Chemical Science and Technology Laboratory

January 1, 1999
Author(s)
Hratch G. Semerjian, W Koch
This report summarizes the research and services provided by the Chemical Science and Technology Laboratory of the National Institute of Standards and Technology for Fiscal Year 1998. The report includes: a general overview of the laboratory's activities
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