Results 231 to 240 of about 2,189,828 (267)

Chemistry of Seawater Neutralization of Bauxite Refinery Residues (Red Mud)

Environmental Engineering Science, 2004
Bayer process red muds are highly alkaline, and their disposal and potential for reuse are complicated by high concentrations of sodium, high pH, and high alkalinity. Several methods of neutralization of red muds have been reported including: infiltration of rainwater and atmospheric CO2, treatment with strong acids, gypsum addition, and seawater ...
Hanahan, Colleen, McConchie, David, Pohl, John, Creelman, Robert, Clark, Malcolm, Stocksiek, Curt   +5 more
openaire   +3 more sources

Morphology and chemistry of projectile residue in small experimental impact craters

Journal of Geophysical Research: Solid Earth, 1983
Small‐scale impact craters (5‐7 mm in diameter) were produced with a light gas gun in high purity Au and Cu targets using soda lime glass (SL) and man‐made basalt glass (BG) as projectiles. Maximum impact velocity was 6.4 km/s resulting in peak pressures of approximately 120–150 GPa.
E. Schneider, Friedrich Hörz, Hugo Fechtig, J. Janicke   +3 more
openaire   +2 more sources

Origin of the residual polarization in muon chemistry studies of solvent mixtures

The Journal of Physical Chemistry, 1981
When polarized positive muons are stopped in common chemicals, there is always a residual polarization due to the fraction of muons which immediately enter diamagnetic states. This fraction varies considerably, being 0.17, 0.62, and 1.0 in benzene, cyclohexane, and carbon tetrachloride, respectively. In order to examine the mechanism by which it arises,
Y. C. Jean, B. W. Ng, J. H. Brewer, Donald G. Fleming, David C. Walker   +4 more
openaire   +2 more sources

A Web-Based Model of N Mineralization from Cover Crop Residue Decomposition

Soil Science Society of America Journal, 2018
Cover crops can provide substantial quantities of N for subsequent crops, but estimating the amount of N that will be mineralized from residues is challenging.
L. Woodruff, D. Kissel, M. Cabrera, M. Habteselassie, R. Hitchcock, J. Gaskin, M. Vigil, L. Sonon, U. Saha, N. Romano, J. Rema   +10 more
semanticscholar   +1 more source

Sampling and sample processing in pesticide residue analysis.

Journal of Agricultural and Food Chemistry, 2015
Proper sampling and sample processing in pesticide residue analysis of food and soil have always been essential to obtain accurate results, but the subject is becoming a greater concern as approximately 100 mg test portions are being analyzed with ...
S. Lehotay, J. Cook
semanticscholar   +1 more source

Impacts of forest post thinning residues on soil chemistry, fauna and roots: Implications of residue removal in Finland

Applied Soil Ecology, 2012
Abstract There is increasing interest in removing greater amounts of non-timber residues from forests for use in energy production. As part of a study aimed at elucidating the ecological impacts of these practices in Finland, piles of thinning residues of contrasting mass per unit area were established in 2004 around the base of individual Scots pine
Dighton, J., Helmisaari, H.-S., Maghirang, M., Smith, S., Malcolm, K., Johnson, W., Quast, L., Lallier, B., Gray, D., Setälä, H., Starr, M., Luiro, J., Kukkola, M.   +12 more
openaire   +3 more sources

Catalytic pyrolysis of Arab Heavy residue and effects on the chemistry of asphaltene

Journal of Analytical and Applied Pyrolysis, 2010
Abstract In an attempt to understand the changes in asphaltene structure during pyrolysis, hydrothermal reactions were performed on Arab Heavy atmospheric residue using FCC catalyst, ZSM-5 zeolite, hydrocracking catalyst (HC-1) and hydroprocessing (NiMo) catalyst in a bench-scale fixed bed reactor.
openaire   +2 more sources

Residue chemistry guidelines.

Quality assurance (San Diego, Calif.), 1994
Residue chemistry guidelines are designed to determine what the potential residues in food are and how much may be present as a result of pesticide application, so that a tolerance level may be established. Some requirements are established to assist in the enforcement of tolerances by the USDA, FDA, and the states.
C L, Olinger, R D, Schmitt, E, Zager
openaire   +1 more source

Litter decomposition, residue chemistry and microbial community structure under two subtropical forest plantations: A reciprocal litter transplant study

, 2016
Zongming He, Zaipeng Yu, Zhiqun Huang, M. Davis, Yusheng Yang   +4 more
semanticscholar   +1 more source

Crop residue chemistry, decomposition rates, and CO2 evolution in Bt and non-Bt corn agroecosystems in North America: a review

Nutrient Cycling in Agroecosystems, 2010
S. Yanni, J. Whalen, B. Ma
semanticscholar   +1 more source