PHENOLIC ANTIOXIDANT ENRICHMENT OF SOY FLOUR-SUPPLEMENTED GUAVA WASTE BY RHIZOPUS OLIGOSPORUS-MEDIATED SOLID-STATE BIOPROCESSING
| Autor: | Patrick McCue, Kalidas Shetty, Gorete Ribeiro de Macedo, Roberta Targino Pinto Correia, Margarida Maria dos Anjos Magalhães |
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| Rok vydání: | 2004 |
| Předmět: |
Pharmacology
Phenolic antioxidant Antioxidant biology Chemistry Bioconversion medicine.medical_treatment Rhizopus oligosporus Biophysics Cell Biology biology.organism_classification chemistry.chemical_compound Residue (chemistry) Biochemistry medicine Food science Phenols Bioprocess Phycomycetes Food Science |
| Zdroj: | Journal of Food Biochemistry. 28:404-418 |
| ISSN: | 0145-8884 |
| Popis: | In this paper, we investigated the potential for Rhizopus oligosporus to produce enhanced levels of free phenolics from guava residue mixed with soy flour as the nitrogen source. b -glucosidase activity and antioxidant activity in crude extracts were evaluated. Two substrates were studied based on carbon and nitrogen ratios: A, 90% guava residue : 10% soy flour (G9) and B, 50% guava residue : 50% soy flour (G5). Bioprocessing increased water extractable phenolics 12.9% with G9 substrate and 98.6% with G5 substrate. For both substrates, antioxidant activity increased during early stages of fungal growth but decreased thereafter. Phenolic antioxidant mobilization during bioprocessing was associated with b -glucosidase activity and hypothesized to involve the mobilization of polymeric phenolics. The bioconversion of soy flour-supplemented guava residue by R. oligosporus represents a novel strategy for the enhancement of phenolic antioxidant content and potential commercial value of guava wastes. |
| Databáze: | OpenAIRE |
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