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dc.contributor.authorKouras Sofia
dc.contributor.authorAmine Khodja Amina
dc.date.accessioned2016-11-14T13:57:34Z
dc.date.issued2012-04-12
dc.identifierhttp://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6127
dc.identifier6127
dc.identifier20120628u u u0frey50 ba
dc.identifier.urihttp://hdl.handle.net/123456789/12633
dc.description151 f.
dc.description.abstractThe photodeamination of the herbicide metamitron (M T) was studied in pure water by irradiation with continuous and pulsed light. This study leads to understand the mechanism of this photochemical reaction and to demonstrate the formation of nitrous acid and desaminometamitron (DAM) as main product. Two origi nal transients resulting from the photolysis of MT and leading to deamination were de tected and characterized. We also studied the influence of humic substances ( HS) from various sources (humic and fulvic acids, soil or peat) on the degradation of t rimethylphenol (TMP) photosensitized by riboflavin (Ri). Humic acids (HA) have a prooxidant effect on the phototransformation for low concentrations and antioxidant for high ones. A reactional mechanism was proposed in both cases. Fulvic acids (FA) have almost no effect
dc.format31 cm.
dc.languagefre
dc.publisherUniversité Mentouri Constantine
dc.subjectChimie
dc.titlePhotoréactivité de la métamitrone et mécanisme de photosensibilisation par le mélange riboflavine/substances humiques
dc.coverageDoctorat en sciences 2 copies imprimées disponibles


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