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Photosensitizing properties of formulation adjuvants

Paper ID Volume ID Publish Year Pages File Format Full-Text
28124 44060 2009 6 PDF Available
Title
Photosensitizing properties of formulation adjuvants
Abstract

Protein hydrolysed fertilizers (PHFs) are currently used to stimulate plant metabolism, mainly through foliar application, and are proposed for use as pesticide adjuvants. However, the effects of PHFs on pesticides upon irradiation are unknown. Here, several herbicides and model compounds were irradiated with simulated solar light in the presence of four PHFs extracted from animal proteins and from vegetal. PHFs enhanced the photodegradation of fenuron, mesotrione, 2-mercaptobenzothiazole and 2,4,6-trimethylphenol. Using the scavenging technique, we could evidence the direct reaction of triplet excited states of PHFs towards substrates and we evaluated the contribution of triplets, singlet oxygen and hydroxyl radicals. Hydroxyl radicals were not detected; they were either not formed or were efficiently scavenged by the PHFs. The four PHFs showed distinct photosensitizing abilities. Production processes, rather than origin of the PHFs, seem to govern the photochemical reactivity of the PHFs.

Keywords
Photodegradation; Pesticides; Formulant; Reactive species
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 203, Issues 2–3, 15 April 2009, Pages 186–191
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us