| Photosensitizing properties of protein hydrolysate-based fertilizers. | |
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MedLine Citation:
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PMID: 17117805 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The use of protein hydrolysate-based fertilizers (PHF) as adjuvant for pesticides or herbicides has been proposed; however, the behaviors of mixtures of PHFs and pesticides under solar light are not known, and various photochemical reactions may occur. The photosensitizing properties of PHFs were investigated in water solutions (0.8 g of total organic carbon L(-1)) within the wavelength range of 300-450 nm, using furfuryl alcohol (FA) as a probe to test the involvement of singlet oxygen and Irgarol 1051 as an example of organic pollutant. Two commercial PHFs and one standard PHF were studied, all of the products being of animal origin. PHFs photosensitize the transformation of FA (10(-4) M), and the kinetics of FA disappearance follows an apparent first-order rate law. Through the use of sodium azide (1 x 10(-3) M) as singlet oxygen scavenger and deuterium oxide (D2O) for increasing the singlet oxygen lifetime it was shown that singlet oxygen contributes largely to the phototransformation of FA. The replacement of water by D2O increases the apparent first-order rate constant 6 times, whereas the addition of sodium azide reduces it by approximately 90%. These results are confirmed using Irgarol 1051 (10(-5) M). The photosensitizing properties of PHFs might be due to pigments naturally present in tissues from which they are extracted or to compounds generated during the production processes. |
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Authors:
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Luciano Cavani; Alexandra Ter Halle; Claire Richard; Claudio Ciavatta |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 54 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2006 Nov |
Date Detail:
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Created Date: 2006-11-22 Completed Date: 2007-01-26 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 9160-7 Citation Subset: IM |
Affiliation:
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Dipartimento di Scienze e Tecnologie Agroambientali, Alma Mater Studiorum-Università di Bologna, Viale Fanin 40, I-40127 Bologna, Italy. lcavani@agrsci.unibo.it |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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chemistry Fertilizers / analysis* Furans / chemistry Humans Kinetics Protein Hydrolysates / chemistry* Sunlight* Triazines / chemistry |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Fertilizers; 0/Furans; 0/Protein Hydrolysates; 0/Triazines; 28159-98-0/irgarol 1051; 98-00-0/furfuryl alcohol |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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