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Your search keyword '"Langford, Cooper H."' showing total 21 results
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21 results on '"Langford, Cooper H."'

1. Chlorothalonil and its 4-hydroxy derivative in simple quartz sand soils: a comparison of sorption processes

Author

Gamble, Donald S., Lindsay, Elspeth, Bruccoleri, Aldo G., and Langford, Cooper H.

Subjects
Pollution control industry -- Research, Soil absorption and adsorption -- Research, Soils -- Analysis, Environmental issues, Science and technology
Abstract

The following experiment examined quartz sandy soils from North Carolina and Simcoe, Ontario, Canada, and found that the chlorothalonil sorption properties were almost the same.

Published
2001

2. Soil wetting processes studied by magnetic resonance imaging: correlated study of contaminant uptake

Author

Belliveau, Suzanne M., Henselwood, Tracey L., and Langford, Cooper H.

Subjects
Pesticides industry -- Research, Environmental issues, Science and technology, University of Calgary -- Research
Abstract

Researchers from the University of Calgary, Canada investigated the kinetics of the uptake of pesticides in a wet organic soil sample from Mossy Point using proton magnetic resonance imaging

Published
2000

3. Structural characterization of a fulvic acid and a humic acid using solid-state Ramp-CP-MAS 13C nuclear magnetic resonance

Author

Cook, Robert L. and Langford, Cooper H.

Subjects
Nuclear magnetic resonance -- Usage, Fulvic acids -- Analysis, Humic acid -- Analysis, Environmental issues, Science and technology
Abstract

A new cross polarization magic angle spinning (CP-MAS) nuclear magnetic resonance technique allowed the accurate structural characterization of a fulvic acid and a humic acid. Results revealed that carbohydrate moieties play a significant role in the fulvic acid and contain the major chemical functionality. The spectra and relaxation parameters obtained allowed the development of two models for the fulvic acid and the humic acid.

Published
1998

4. Kinetic study of the speciation of copper (II) bound to a hydrous ferric oxide

Author

Gutzman, Donald W. and Langford, Cooper H.

Subjects
Chemical reaction, Rate of -- Research, Environmental issues, Science and technology
Abstract

A study has investigated the kinetic speciation of copper(II) (CuII) binding to hydrous ferric oxides. Kinetic studies suggests greater heterogeneity than previous equilibrium methods of Cu(II) speciation. Equilibrium methods failed to distinguish different binding sites for Cu(II).

Published
1993

5. Evaluation of primary photoproduct quantum yields in fulvic acid

Author

Bruccoleri, Aldo, Pant, Bhuvan C., Sharma, Devendra K., and Langford, Cooper H.

Subjects
Fulvic acids -- Measurement, Quantum optics -- Research, Environmental issues, Science and technology
Abstract

The energies and quantum yields for the formation of triplet states in aqueous solutions of Laurentian and Armadale fulvic acids were investigated using time-resolved photoacoustic spectroscopy together with magnetic circular dichroism spectroscopy. The results showed that the Laurentian sample featured yields which ranged from 0.79 to 0.28 for the pH range 2.0 to 9.5. The Armadale sample had a yield ranging from 0.82 to 0.35 for the same pH range.

Published
1993

6. Interaction of atrazine with Laurentian soil

Author

Wang, Zhendi, Gamble, Donald S., and Langford, Cooper H.

Subjects
Laurentian Mountains -- Environmental aspects, Atrazine -- Environmental aspects, Soil pollution -- Research, Environmental issues, Science and technology
Published
1992

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