نتایج جستجو برای: photochemical degradation

تعداد نتایج: 161059  

Journal: :Journal of the agricultural chemical society of Japan 1954

Journal: :Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology 2013
Cláudia Gomes Silva Judith Monteiro Rita R N Marques Adrián M T Silva Cristina Martínez Moisés Canle Joaquim Luís Faria

Photochemical and photocatalytic degradation of the emerging pollutant trans-resveratrol has been studied under different irradiation wavelengths and using different TiO2 catalysts. trans-Resveratrol was more easily degraded when irradiated using the whole spectral range (UV-Vis) rather than with UV and near-UV to visible irradiation. The main intermediate of trans-resveratrol phototransformati...

A. Borthakur D. Tiwary N. Srivastava P.K. Mishra Pardeep Singh, R. Singh

The resource intensive human activities (such as mining and extraction of mineral oils for betterment of life and modernization of society) have increased environmental pollution several folds. Products of mining and petrochemical industries are advantageous for the modern society. But waste generated such as BTEX from such industries are carcinogenic, toxic and causes adverse effects on enviro...

Journal: :Environmental science & technology 2007
Nina Matykiewiczová Jana Klánová Petr Klán

This work represents the first laboratory study known to the authors describing photochemical behavior of persistent organic pollutants in snow at environmentally relevant concentrations. The snow samples were prepared by shock freezing of the corresponding aqueous solutions in liquid nitrogen and were UV-irradiated in a photochemical cold chamber reactor at -25 degrees C, in which simultaneous...

Journal: :Environmental Health Perspectives 1972
O. Hutzinger S. Safe V. Zitko

Polychlorinated biphenyls (PCBs) are stable towards oxidation, hydrolysis and other chemical reactions which conceivably occur in the environment. Although there is little direct evidence available, it is generally assumed that PCBs, particularly those with a high chlorine content, are also quite resistant to metabolic change. Over the past years photochemical degradation was shown to be a poss...

Journal: :Environmental Health Perspectives 1973
O Hutzinger S Safe B R Wentzell V Zitko

2010
Zahid Zaheer Mazhar Farooqui

A simple, selective, precise and stability-indicating high-performance thin-layer chromatographic method of analysis of Clozapine in pharmaceutical dosage form was developed and validated. The method employed TLC aluminium plates precoated with silica gel 60F-254 as the stationary phase. The solvent system comprised of toluene methanol ethyl acetate ammonia (8:2:1:0.1, v/v/v/v). This system was...

Journal: :Bulletin of the Chemical Society of Japan 1957

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