Results 161 to 170 of about 17,335 (216)

Photodegradable formulations of DDT

Experientia, 1976
The incorporation of diphenylamine and diethylaniline in commercial DDT-WDP formulations sprayed on Phaseolus aureus and Tabernaemontana coronaria revealed that both these chemicals enhanced the initial rate of loss of DDT. Both these sensitizers exhibited no immediate adverse effect on the storage stability, pH, sieve requirement and colour of the ...
B S, Parmar, S Y, Pandey, S K, Mukerjee
openaire   +2 more sources

Photodegradation of Cassava and Corn Starches [PDF]

Journal of Agricultural and Food Chemistry, 2001
The baking expansion properties of sour cassava starch (Polvilho azedo) are attributable to photochemical starch degradation induced by heterolactic fermentation after sun-drying. This study investigated the effects of UV irradiation on the different structural levels of cassava starch as compared to those of corn starch and dextrins.
Bertolini, A.C., Mestres, Christian, Raffi, J., Buleon, Alain, Lerner, D., Colonna, Paul   +5 more
openaire   +3 more sources

Photodegradation of psychiatric pharmaceuticals in aquatic environments – Kinetics and photodegradation products

Water Research, 2011
Benzodiazepines are widely consumed psychiatric pharmaceuticals which are frequently detected in the environment. The environmental persistence and fate of these pharmaceuticals as well as their degradation products is of high relevance and it is, yet, scarcely elucidated.
Calisto, Vânia, Domingues, M. Rosário M., Esteves, Valdemar I.   +2 more
openaire   +3 more sources

Photodegradation paths of cefotaxime

Journal of Pharmaceutical Sciences, 1988
The degradation kinetics of cefotaxime sodium salt in aqueous solution, under UV light at 254 nm, was investigated by HPLC and antibiotic activity. This degradation is the result of two competitive processes, an isomerization and a photolysis. This study is mostly about the isomerization step.
D A, Lerner, G, Bonnefond, H, Fabre, B, Mandrou, M, Simeon de Buochberg   +4 more
openaire   +2 more sources

Photodegradation of pesticides - VII Photodegradation of carbetamide - photoproducts

Chemosphere, 1993
The Photochemical degradation of the herbicide Carbetamide in different solvents has been investigated. The photoproducts were characterised by spectroscopic methods and also identified by comparison with synthetic samples. The pathway of formation of the photoproducts is described.
P. Méallier, A. Mamouni, M. Mansour
openaire   +1 more source

Photodegradation of pesticides on adsorbed phases photodegradation of carbetamid

Chemosphere, 1993
Abstract The photochemical characteristics of carbetamid herbicide adsorbed on different solid supports were investigated. No significant difference was found for λ max and triplet state of carbetamid, however, the structural properties such as specific area and reflection coefficient are very different for each support.
C. Emmelin, S. Guittonneau, R. Lamartine, P. Méallier   +3 more
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Photodegradation of Chlorpromazine Hydrochloride

Journal of Pharmaceutical Sciences, 1964
The quantum efficiency of chlorpromazine hydrochloride (CLP HCI) at 253.5 m μ in aqueous media (pH 1.5) was 0.18 and 0.14 under normal and oxygen-free atmospheres, respectively. The quantum efficiency remained constant within the concentration range and periods of irradiation studied, but increased at pH values above 4.5.
A, FELMEISTER, C A, DISCHER
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Photodegradation of phosphonates in water

Chemosphere, 2005
Phosphonates are widely used as chelating agents, e.g., in water cooling systems, in bleaching baths or as scale inhibitors in deflocculation agents. They are considered to be difficult to degrade and produce aminomethylphosphonic acid (AMPA) as a metabolite. As the fate of phosphonates in the environment is not very well known the present work aims at
Céline, Lesueur, Michael, Pfeffer, Maria, Fuerhacker   +2 more
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Photodegradation of diafenthiuron in water

Pest Management Science, 2002
AbstractDiafenthiuron, 1‐tert‐butyl‐3‐(2,6‐di‐isopropyl‐4‐phenoxyphenyl)thiourea, is an effective insecticide and acaricide. Sunlight degradation of diafenthiuron in various aqueous solutions and pure hexane yielded two major identified products: 1‐tert‐butyl‐3‐(2,6‐di‐isopropyl‐4‐phenoxyphenyl)carbodiimide (CGA‐140 408) and 1‐tert‐butyl‐3‐(2,6‐di ...
Young-Soo, Keum, Jeong-Han, Kim, Yong-Whan, Kim, Kyun, Kim, Qing X, Li   +4 more
openaire   +2 more sources

Photodegradation of buprofezin

Toxicological & Environmental Chemistry, 1997
Buprofezin, a new insecticide cum insect growth regulator, when subjected to UV ‐ photodegra‐dation in methanolic solution (1000 ppm) yielded seven photoproducts which on the basis of Chromatographic and spectroscopic evidences were characterised as (i) N‐tert‐butyl‐N'‐isopropyl thiourea, (ii) N‐ (N‐methyl carbamoyl) ‐N‐isopropyl‐N'‐tert‐butyl thiourea,
Subhendu Datta, Suresh Walia
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