Search results for "Degradation process"

showing 2 items of 12 documents

Quercetin as natural stabilizing agent for bio-polymer

2014

The introduction of antioxidants in polymers is the main way to prevent or delay the degradation process. In particular natural antioxidants receive attention in the food industry also because of their presumed safety. In this work bio-polymers, i.e. a commercial starch-based polymer (Mater-Bi®) and a bio-polyester (PLA), and a bio-polyether (PEO) were additivated with quercetin, a natural flavonoid antioxidants, in order to formulate bio-based films for ecosustainable packaging and outdoor applications. The photo-oxidation behavior of unstabilized and quercetin stabilized films was analyzed and compared with the behavior of films additivated with a commercial synthetic light stabilizer. Th…

chemistry.chemical_classificationPolyesterchemistry.chemical_compoundMaterials sciencechemistryStarchFlavonoidOrganic chemistryNatural antioxidant Quercetin Bio-polymer Photoxidation StabilizationPolymerDegradation processQuercetinStabilizer (chemistry)
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Metabolism of stilbene phytoalexins by Botrytis cinerea: 1. Characterization of a resveratrol dehydrodimer

1998

Abstract Resveratrol, a grapevine phytoalexin, is metabolized by a laccase-like stilbene-oxidase of Botrytis cinerea, the causal organism for grey mould. Characterization of one major metabolite formed during this degradation process as a resveratrol dehydrodimer allowed us to precize the reaction mechanism of this enzyme on stilbenes.

chemistry.chemical_classificationbiologyStereochemistryMetabolitePhytoalexinOrganic ChemistryMetabolismResveratrolbiology.organism_classificationBiochemistrychemistry.chemical_compoundEnzymeBiochemistrychemistryDrug DiscoveryDegradation processCausal organismBotrytis cinereaTetrahedron Letters
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