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Production of phenolic antioxidants by the solid-state bioconversion of pineapple waste mixed with soy flour using Rhizopus oligosporus

Paper ID Volume ID Publish Year Pages File Format Full-Text
36756 45146 2004 6 PDF Available
Title
Production of phenolic antioxidants by the solid-state bioconversion of pineapple waste mixed with soy flour using Rhizopus oligosporus
Abstract

The ability of Rhizopus oligosporus to produce enhanced levels of free phenolics from pineapple residue mixed with soy flour as potential nitrogen source was investigated. Concurrently, phenolic-linked β-glucosidase and the antioxidant activity of the extracts were followed. Two treatments were studied: (A) 9 g of pineapple residue and 1 g of soy flour (P9); (B) 5 g of pineapple residue and 5 g of soy flour (P5). The increase of water extractable phenolics was 39.3% for P9 treatment and 79.4% for P5 treatment. During early stages of growth high antioxidant activity, low phenolic content and low β-glucosidase specific activity was observed. High antioxidant activity was likely due to the presence of insoluble polymeric phenolics, know for their high antioxidant activity. A marked decrease of the antioxidant activity of P5 treatment during late stages of growth was observed due to likely formation of free soluble phenolics. The moderate total phenolics content and high β-glucosidase specific activity of P9 treatment in late stages is likely the consequence of low nitrogen content in this treatment. The bioconversion of pineapple residue by R. oligosporus leads to enhanced levels of phenolic compounds, mainly for P5 treatment. This approach offers a novel strategy to enhance the value of pineapple wastes.

Keywords
Phenolic antioxidants; Pineapple residue; Soy; Rhizopus oligosporus; Solid-state bioconversion; β-Glucosidase
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Production of phenolic antioxidants by the solid-state bioconversion of pineapple waste mixed with soy flour using Rhizopus oligosporus
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 39, Issue 12, 29 October 2004, Pages 2167–2172
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