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- W2014927352 abstract "Products obtained by interaction of a soil humic acid with a number of s-triazines and substituted ureas, well known to act as photosynthesis inhibitor herbicides, were studied by infrared (IR) and electron spin resonance (ESR) spectrometries.Analysis of spectroscopic results showed that single-electron transfer processes take place reasonably between ring or chain donor groups of the herbicide molecule and acceptor quinone units of the humic acid, thus producing additional unpairing of electrons in the resulting charge-transfer complexes.Experimental and theoretical considerations suggested the hypothesis that the investigated herbicides may react chemically with humic compounds by simulating analogous processes that take place on biological scale in chloroplasts, on the basis of similar electron donor-acceptor reactions involving free radicals.Freie Radikale bei ϵ-Donator-Akzeptor-Reaktionen zwischen Photosynthese-hemmenden Herbiziden und Bodenhuminsauren.Die durch die Wechselwirkung einer Bodenhuminsaure mit Triazinen und substituierten Harnstoffen, die als photosynthese-hemmende Herbizide bekannt sind, entstandenen Produkte wurden mit Hilfe der Infrarot- (IR) und Elektronenspin-Resonanzspektrometrie (ESR) untersucht.Die Analyse der ESR-Daten zeigt, das Ein-Elektron-Transfer-Prozesse stattfanden zwischen dem Ring oder der Kette des Herbizidmolekuls als ϵ-Donator und chinoiden Strukturteilen der Huminsaure als ϵ-Akzeptor-Komponenten.Experimente und theoretische Uberlegungen stutzen die Hypothese, das die Herbizide, die wir studiert haben, sich mit Huminsauren umsetzen konnen und so Prozesse simulieren, die in den Chloroplasten stattfinden und von ahnlichen Elektron-Donor-Akzeptor-Reaktionen ausgehend zu freien Radikalen fuhren konnen." @default.
- W2014927352 created "2016-06-24" @default.
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- W2014927352 date "1981-01-01" @default.
- W2014927352 modified "2023-09-26" @default.
- W2014927352 title "Free radicals in electron donor-acceptor reactions between a soil humic acid and photosynthesis inhibitor herbicides" @default.
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- W2014927352 doi "https://doi.org/10.1002/jpln.19811440607" @default.
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