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You searched on: Author: joseph conny Sorted by: title

Displaying records 1 to 10 of 19 records.
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1. Analysis of Kaolinite/Chrysotile Mixtures by Ashing and X-Ray Diffraction
Published: 9/1/2002
Authors: Jennifer R Verkouteren, Eric S Windsor, Joseph M Conny, R L Perkins, J T Ennis
Abstract: A simple ashing procedure is described that converts kaolinite to amorphous metakaolinite while retaining the diffraction intensity of chrysotile. This ashing procedure removes the XRD pattern overlap between kaolinite and chrysotile that can interf ...

2. Black Carbon and Organic Carbon in Aerosol Particles From Crown Fires in the Canadian Boreal Forest
Published: 6/1/2002
Authors: Joseph M Conny, J F. Slater
Abstract: In the boreal forest, high-intensity crown fires account for an overwhelming proportion of the area burned yearly. Quantifying the amount of black carbon (BC) from boreal crown fires in Canada is essential for assessing the effect on regional climat ...

3. Boreal Fires, Aerosol Transport, and Feedback to Climate Change: The Need for a Large High-Intensity Boreal Crown Fire Experiment
Published: 12/1/1999
Authors: W R Cofer, C Cahoon, R D, B J Stocks, J G Goldhammer, Joseph M Conny, M D Fromm

4. Carbon-13 Composition of Tropospheric CO in Brazil: A Model Scenario During the Biomass Burn Season
Published: 12/1/1997
Authors: Joseph M Conny, R Michael Verkouteren, Lloyd A. Currie

5. Filter Material Effects on Particle Absorption Characteristics
Published: 2/10/2014
Authors: Cary Presser, Joseph M Conny, Ashot Nazarian
Abstract: The absorption coefficient and mass specific absorption cross section were determined for nigrosin-laden quartz, Teflon, and polycarbonate filters in inert surroundings at different steady-state temperatures and particle mass loadings. The objective ...

6. High-Volume PM2.5 Samples With Distinctive Source Influences and Their Characterization by Optical Behavior in Thermal-Optical Transmission Analysis
Published: Date unknown
Authors: Joseph M Conny, Douglas A Olson, G A Norris, T R Gould, S Biswas, B Chakrabarti, C Sioutas
Abstract: The objective of this study was to sample particulate matter <2.5 m (PM2.5) with distinctive source influences to optimize thermal-optical analysis for black carbon measurement. High-volume samples of PM2.5 were collected at different PM mass levels ...

7. How Does Thermal-Optical Analysis for Atmospheric Elemental Carbon Behave Optically? Investigations of the Apparent Specific Absorption Cross Section
Published: Date unknown
Author: Joseph M Conny
Abstract: Thermal-optical analysis (TOA) is a principal method for measuring elemental carbon (EC) associated with atmospheric soot. It relies on changes in the optical behavior of carbon in particulate matter (PM) to indicate when carbon measured as EC sepa ...

8. Measurement of the Optical Extinction Coefficient of Combustion-Generated Aerosol
Published: 2/1/2005
Authors: J F. Widmann, J x Duchez, Joseph M Conny, George William Mulholland
Abstract: This note describes mesurements of the optical extinction coefficient of carbonaceous aerosol produced during hydrocarbon combustion. Measurements of the mass specific extinction coefficient were obtained by laser extinction at 632 nm wavelength. T ...

9. NIST Data Resources for Surface Analysis by X-Ray Photoelectron Spectroscopy and Auger Electron Spectroscopy
Published: 3/1/2001
Authors: Cedric John Powell, Aleksander Jablonski, A Naumkin, A Kraut-Vass, Joseph M Conny, J R. Rumble
Abstract: A description is given of data resources that are available from the National Institute of Standards and Technology (NIST) for x-ray photoelectron spectroscopy (XPS) and Auger-electron spectroscopy. NIST currently has three databases available: an ...

10. Optimizing Thermal-Optical Methods for Measuring Atmospheric Elemental (Black) Carbon: A Response Surface Study
Published: 9/1/2003
Authors: Joseph M Conny, D Klinedinst, Scott A Wight, J L Paulsen
Abstract: The chemical, physical, and morphological complexity of atmospheric aerosol black carbon (BC) presents major problems in measurement accuracy. Methods based on thermal-optical analysis (TOA) are widely used for ambient air samples because no prior kn ...

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