G
Gregory L. Kok
Researcher at National Center for Atmospheric Research
Publications - 93
Citations - 7291
Gregory L. Kok is an academic researcher from National Center for Atmospheric Research. The author has contributed to research in topics: Aerosol & Hydrogen peroxide. The author has an hindex of 42, co-authored 93 publications receiving 6941 citations.
Papers
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Journal ArticleDOI
Single‐particle measurements of midlatitude black carbon and light‐scattering aerosols from the boundary layer to the lower stratosphere
Joshua P. Schwarz,Joshua P. Schwarz,Ru-Shan Gao,David W. Fahey,David W. Fahey,David S. Thomson,David S. Thomson,L. A. Watts,L. A. Watts,James C. Wilson,J. M. Reeves,M. Darbeheshti,Darrel Baumgardner,Gregory L. Kok,Serena H. Chung,Serena H. Chung,Michael Schulz,Johannes Hendricks,Axel Lauer,Bernd Kärcher,Jay G. Slowik,Karen H. Rosenlof,Thomas L. Thompson,Andrew O. Langford,Max Loewenstein,Kenneth C. Aikin,Kenneth C. Aikin +26 more
TL;DR: In this paper, a single-particle soot photometer (SP2) was used on a NASA WB-57F high-altitude research aircraft in November 2004 from Houston, Texas.
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Chemical mechanisms of acid generation in the troposphere
Jack G. Calvert,Allan L. Lazrus,Gregory L. Kok,Brian G. Heikes,James Walega,John A. Lind,Christopher A. Cantrell +6 more
TL;DR: In this article, it was shown that gaseous hydrogen peroxide is a major oxidant leading to sulphuric acid generation in cloud water, and computer simulations can now rationalize the observed seasonal trends.
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Soot Particle Aerosol Mass Spectrometer: Development, Validation, and Initial Application
Timothy B. Onasch,A. Trimborn,Edward C. Fortner,J. T. Jayne,Gregory L. Kok,Leah R. Williams,Paul Davidovits,D. R. Worsnop +7 more
TL;DR: The Soot Particle Aerosol Mass Spectrometer (SP-AMS) as discussed by the authors was developed to measure the chemical and physical properties of particles containing refractory black carbon (rBC).
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Automated fluorimetric method for hydrogen peroxide in atmospheric precipitation
TL;DR: In this article, an automated analytical technique for the determination of hydrogen peroxide (H/sub 2/O/sub2/) in the liquid phase has been developed, which is based on the reaction of H /sub 2 /O/Sub 2 with horseradish peroxidase and p-hydroxyphenylacetic acid (POPHA).
Journal ArticleDOI
Automated fluorometric method for hydrogen peroxide in air
Allan L. Lazrus,Gregory L. Kok,John A. Lind,Sonia N. Gitlin,Brian G. Heikes,Richard E. Shetter +5 more
TL;DR: In this paper, a fluorometric method for measuring H/sub 2/O/Sub 2/ vapor in air utilizes peroxidase enzyme to catalyze the reaction in which hydroperoxides cause dimerization of (p-hydroxyphenyl)acetic acid.