Results 221 to 230 of about 231,063 (267)

Degradation methods and degradation kinetics of polymer films

Polymer Degradation and Stability, 1994
Abstract Two accelerated degradation systems are described for the marine and soil exposures of polymer films. The systems were designed to provide controlled environments in which rates of degradation could be accelerated. The goal in developing these systems was to provide a standardized basis for comparing degradation kinetics of the films ...
D.L. Kaplan, J.M. Mayer, M. Greenberger, R. Gross, S. McCarthy   +4 more
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Kinetics of diesel degradation by an acrylamide-degrading bacterium

Rendiconti Lincei, 2014
In this work, we characterized a novel acrylamide-degrading bacterium with the ability to degrade diesel. Tentatively, the isolate was identified as Burkholderia sp. strain DRY27 and was shown to have increased growth rate on media supplemented with 0–3 % (v/v) diesel.
Ahmad, Siti Aqlima, Ku Ahamad, Ku Nurul Ezreen, Wan Johari, Wan Lutfi, Halmi, Mohd Izuan Effendi, Abd. Shukor, Mohd Yunus, Yusof, Mohd Termizi   +5 more
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Stereoselective degradation kinetics of tebuconazole in rabbits

Chirality, 2006
AbstractTebuconazole[(RS)‐1‐p‐chlorophenyl‐4,4‐dimethyl‐3‐(1H‐1,2,4‐triazol‐1‐ylmethyl)pentan‐3‐ol] is a potent triazole fungicide and consists of a pair of enantiomers. The enantioselective degradation kinetics of tebuconazole was investigated in rabbits by intravenous (iv) injection. The concentrations of (−)‐(R)‐tebuconazole and (+)‐(S)‐tebuconazole
Wentao, Zhu, Jing, Qiu, Ziheng, Dang, Chunguang, Lv, Guifang, Jia, Li, Li, Zhiqiang, Zhou   +6 more
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Kinetic investigation of malathion degradation in water

Bulletin of Environmental Contamination and Toxicology, 1975
Malathion exhibits considerable biological selectivity and has been the subject of many comparative biological studies. The kinetics of microbial degradation of malathion by aquatic organisms has been reported by PARIS et al. (2), and a kinetic study in soils has been carr-~ed--out by KONRAD et al.
N L, Wolfe, R G, Zepp, G L, Baughman, J A, Gordon   +3 more
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Kinetics and Mechanism of Degradation of Ampicillin in Solution

Journal of Pharmaceutical Sciences, 1969
The kinetics of degradation of ampicillin (α-aminobenzyl penicillin) in solution was investigated at 35° and constant ionic strength of 0.5 over a pH range of 0.8 to 10. The observed rates, obtained by measuring the remaining intact penicillin, were shown to observe first-order kinetics and were shown to be significantly influenced by general acid and ...
J P, Hou, J W, Poole
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Kinetic Study on Cephamycin C Degradation

Applied Biochemistry and Biotechnology, 2013
Cephamycin C (CepC) is a β-lactam antibiotic that belongs to the cephalosporin class of drugs. This compound stands out from other cephalosporins for its greater resistance to β-lactamases, which are enzymes produced by pathogenic microorganisms that present a major mechanism of bacterial resistance to β-lactam antibiotics.
Luciana M, Brites, Liliane M, Oliveira, Marlei, Barboza   +2 more
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Degradation kinetics of VX

Main Group Chemistry, 2010
O-ethyl S-(2-diisopropylaminoethyl)phosphonothiolate (VX) is among the most toxic of chemical warfare agents. VX is an oily liquid that is relatively involatile and is slow to hydrolyze, and thus may persist for weeks or longer in the environment, creating long term contamination of the territory.
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Kinetics of protein substrate degradation by HslUV

Journal of Structural Biology, 2004
The HslUV protease-chaperone complex degrades specific protein substrates in an ATP-dependent reaction. Current models propose that the HslU chaperone, a AAA protein of the Clp/Hsp100 family, binds and unfolds substrates and translocates the polypeptide into the catalytic cavity of the HslV protease.
Ae-Ran, Kwon, Christine B, Trame, David B, McKay   +2 more
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Degradation Kinetics of Somatostatin in Aqueous Solution

Drug Development and Industrial Pharmacy, 2003
The degradation kinetics of somatostatin (somatotropin release inhibiting factor), a cyclic tetradecapeptide, was investigated as a function of temperature, pH, ionic strength, buffer type, and buffer concentration. In addition, the effect of different container materials in which the solutions were stored and the presence of an antimicrobial agent for
Joachim, Herrmann, Roland, Bodmeier
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Degradation Kinetics of Phentolamine Hydrochloride in Solution

Journal of Pharmaceutical Sciences, 1988
The degradation kinetics of phentolamine hydrochloride in aqueous solution over a pH range of 1.2 to 7.2 and its stability in propylene glycol- or polyethylene glycol 400-based solutions were investigated. The observed rate constants were shown to follow apparent first-order kinetics in all cases.
D P, Wang, Y H, Tu, L V, Allen
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