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Vijayalaxmi S, Jayalakshmi SK, Sreeramulu K. Polyphenols from different agricultural residues: extraction, identification and their antioxidant properties. J Food Sci Technol. 2014;52(5):2761-9doi: 10.1007/s13197-014-1295-9.
Vijayalaxmi, S., Jayalakshmi, S. K., & Sreeramulu, K. (2015). Polyphenols from different agricultural residues: extraction, identification and their antioxidant properties. Journal of food science and technology, 52(5), 2761-9. https://doi.org/10.1007/s13197-014-1295-9
Vijayalaxmi, S, et al. "Polyphenols from different agricultural residues: extraction, identification and their antioxidant properties." Journal of food science and technology vol. 52,5 (2015): 2761-9. doi: https://doi.org/10.1007/s13197-014-1295-9
Vijayalaxmi S, Jayalakshmi SK, Sreeramulu K. Polyphenols from different agricultural residues: extraction, identification and their antioxidant properties. J Food Sci Technol. 2015 May;52(5):2761-9. doi: 10.1007/s13197-014-1295-9. Epub 2014 Feb 23. PMID: 25892773; PMCID: PMC4397302.
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J Food Sci Technol. 2015 May;52(5):2761-9. doi: 10.1007/s13197-014-1295-9. Epub 2014 Feb 23.

Polyphenols from different agricultural residues: extraction, identification and their antioxidant properties.

Journal of food science and technology

S Vijayalaxmi, S K Jayalakshmi, K Sreeramulu

Affiliations

  1. Department of Biochemistry, Gulbarga University, Gulbarga, 585106 Karnataka India.
  2. Agricultural Research Station, University of Agricultural Sciences-Raichur, Gulbarga, 585103 Karnataka India.

PMID: 25892773 PMCID: PMC4397302 DOI: 10.1007/s13197-014-1295-9

Abstract

Agricultural residues like sugarcane bagasse (SCB), corn husk (CH), peanut husk (PNH), coffee cherry husk (CCH), rice bran (RB) and wheat bran (WB) are low-value byproducts of agriculture. They have been shown to contain significant levels of phenolic compounds with demonstrated antioxidant properties. In this study, the effects of two types of solvent extraction methods: solid-liquid extraction (SLE) and hot water extraction on the recovery of phenolic compounds from agricultural residues were investigated to optimize the extraction conditions based on total phenolic content (TPC), total tannin content (TTC) and total flavonoids content (TFC). Methanol (50 %) was found to be the most efficient solvent for the extraction of phenolics with higher DPPH, nitric oxide radical scavenging and reducing power activity, followed by ethanol and water. The phenolic compounds of methanolic extracts (50 %) were determined by reverse phase high performance liquid chromatography; in addition gallic acid became the major phenolic acid present in all the agricultural residues whereas ferulic acid, epicatechin, catechin, quercitin and kampferol present in lesser amounts. The present investigation suggested that agricultural residues are potent antioxidants. The overall results of this research demonstrated the potential of agricultural residues to be an abundant source of natural antioxidants suitable for further development into dietary supplements and various food additives.

Keywords: Agriculture residues; Antioxidant activity; Flavonoids; Polyphenols; Tannins

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