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dc.contributor.author
Pajares, Adriana Mabel
dc.contributor.author
Bregliani, Mabel Margarita
dc.contributor.author
Massad, Walter Alfredo
dc.contributor.author
Natera, Jose Eduardo
dc.contributor.author
Challier, Cecilia
dc.contributor.author
Boiero, María Laura
dc.contributor.author
Montenegro, Mariana Angélica
dc.contributor.author
Garcia, Norman Andino
dc.date.available
2018-01-16T20:03:28Z
dc.date.issued
2014-04
dc.identifier.citation
Natera, Jose Eduardo; Garcia, Norman Andino; Montenegro, Mariana Angélica; Challier, Cecilia; Massad, Walter Alfredo; Boiero, María Laura; et al.; On the natural fate of maleic hydrazide. Kinetic aspects of the photochemical and microbiological degradation of the herbicide; Elsevier Science Sa; Journal of Photochemistry and Photobiology B: Biology; 135; 4-2014; 48-54
dc.identifier.issn
1011-1344
dc.identifier.uri
http://hdl.handle.net/11336/33511
dc.description.abstract
Kinetic and mechanistic aspects of the photochemical and microbiological degradation of the herbicide Maleic Hydrazide (MH) have been studied. Riboflavin (Rf, vitamin B2) was employed as a main photosensitizer whereas Humic Acid (HA) was included as a second sensitizer in order to more closely simulate natural environmental conditions. MH quenches excited singlet and triplet states of Rf, with rate constants close to the diffusion limit. The herbicide and dissolved molecular oxygen competitively quench triplet excited Rf. As a consequence the reactive oxygen species (ROS), superoxide radical anion (O2-), hydrogen peroxide (H2O2) and singlet molecular oxygen (O2(1Δg)) are produced by electron- and energy-transfer processes, respectively, as demonstrated by auxiliary experiments employing selective auxiliary quenchers and the exclusive O2(1Δg) generator Rose Bengal (RB). As a global result, the photodegradation of Rf is retarded, whereas MH is degraded by the generated ROS. The bacteria Pseudomonas aeruginosa (Ps) and Bacillus subtilis (Bs), recognized as contaminants surface-water and soil and microbial antagonists of phytopathogenic, were used in the microbiological experiments. Results of the individual incubation of both bacteria in in the presence of MH indicate a stimulation on the Ps growth, implying the biodegradation of the herbicide, whereas MH only exerted a bacteriostatic effect on Bs.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science Sa
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Biodegradation
dc.subject
Humic Acid
dc.subject
Maleic Hydrazide
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Photodegradation
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Riboflavin
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Otras Ciencias Químicas
dc.subject.classification
Ciencias Químicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
On the natural fate of maleic hydrazide. Kinetic aspects of the photochemical and microbiological degradation of the herbicide
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-01-16T18:02:35Z
dc.journal.volume
135
dc.journal.pagination
48-54
dc.journal.pais
Suiza
dc.journal.ciudad
Lausanne
dc.description.fil
Fil: Pajares, Adriana Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Patagonia; Argentina. Universidad Nacional de la Patagonia Austral; Argentina
dc.description.fil
Fil: Bregliani, Mabel Margarita. Universidad Nacional de la Patagonia Austral; Argentina
dc.description.fil
Fil: Massad, Walter Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.description.fil
Fil: Natera, Jose Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.description.fil
Fil: Challier, Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.description.fil
Fil: Boiero, María Laura. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina
dc.description.fil
Fil: Montenegro, Mariana Angélica. Universidad Tecnologica Nacional. Facultad Regional Villa Maria; Argentina. Universidad Nacional de Villa María. Instituto Académico Pedagógico de Ciencias Básicas y Aplicadas; Argentina
dc.description.fil
Fil: Garcia, Norman Andino. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto. Facultad de Ciencias Exactas Fisicoquímicas y Naturales. Departamento de Química; Argentina
dc.journal.title
Journal of Photochemistry and Photobiology B: Biology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jphotobiol.2014.04.002
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S101113441400102X


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