Results 281 to 290 of about 103,942 (331)

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
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Photodegradation

2015
Photodegradationconcerns the breaking of a molecule to smaller molecules (degradation and/or mineralization) by means of the absorption of photons of suitable wavelength such as that found in the infrared radiation, visible light and ultraviolet light of the solar spectrum.
openaire   +2 more sources

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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Photocatalysis: an effective tool for photodegradation of dyes—a review

Environmental science and pollution research international, 2021
M. Saeed, M. Muneer, A. Haq, N. Akram
semanticscholar   +1 more source

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 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
openaire   +1 more source

Photodegradation of carbofuran

Chemosphere, 1990
Abstract Carbofuran (2,3-dihydro-2,2 dimethyl benzofuranyl-7-yl-methyl carbamate, I) when irradiated by sunlight in different solvents furnished several photoproducts. Eleven compounds have been characterized, out of which nine compounds (II to X) by GC/MS and two compounds (XI and XII) by direct comparison with authentic samples.
P. Raha, Asit K. Das
openaire   +1 more source

Organotin Release from Polyvinyl Chloride (PVC) Microplastics and Concurrent Photodegradation in Water: Impacts from Salinity, Dissolved Organic Matter and Light Exposure.

Environmental Science and Technology, 2019
Photochemical weathering leads to degradation of microplastics and releases chemical additives, polymeric fragments and/or byproducts. This study evaluated the release kinetics of organotin compounds (OTCs) from three different sized (10-300 µm ...
Chunzhao Chen, Ling Chen, Ying Yao, F. Artigas, Qinghui Huang, Wen Zhang   +5 more
semanticscholar   +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 Benthiocarb

Chemistry and Ecology, 1996
Abstract The photodegradation of 14C-benthiocarb in water, on a glass surface, on soil and silica gel TLC plates was studied. the study was designed to obtain some information of its dissipation and photodegradation under various laboratory conditions. Benthiocarb degrades readily when exposed to either sunlight or UV light (254 nm).
Hong-Ming Cheng, Deng-Fwu Hwang
openaire   +1 more source