IngentaConnect Extraction of antioxidant compounds from energy crops

Authors: Lau, Ching¹; Carrier, Danielle²; Howard, Luke³; Lay, Jackson⁴; Archambault, Jean⁵; Clausen, Edgar⁶

Source: Applied Biochemistry and Biotechnology, Volume 114, Numbers 1-3, March 2004 , pp. 569-583(15)

Abstract:

Energy crops offer enormous opportunities for increasing the sustain ability of agriculture and energy production in the United States. Nevertheless, opportunities for sustaining biomass energy production may well hinge on producing energy and extracting high-value products from the same crop. Seven potential energy crops (mimosa, sericea, kudzu, arunzo, switchgrass, velvetbean, and castor) were extracted and assayed for the presence of potentially high-value antioxidant compounds. Of these crops, mimosa and sericea had the highest antioxidant potential and were selected for further study. High-performance liquid chromatography (ultraviolet) and liquid chromatography/mass spectrometry techniques were then utilized to help identify the compounds with high antioxidant potential using extract fractionation, and total phenolics and oxygen radical absorbance capability assays as a guide. These analyses indicate that methanol extracts of mimosa foliage most likely contain quercetin, a flavonol that has been associated with cardioprotection. Future work will concentrate on quantifying the quercetin content of mimosa (likely parts-per-million levels), as well as identifying and quantifying other antioxidants found in energy crops.

Keywords: Mimosa; sericea; energy crops; quercetin; antioxidant

Document Type: Research article

DOI: 10.1385/ABAB:114:1-3:569

Affiliations: 1: Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, 72701, Fayetteville, AR, 2: Department of Biological and Agricultural Engineering, University of Arkansas, 203 Engineering Hall, 72701, Fayetteville, AR, 3: Department of Food Science, University of Arkansas, 2650 N. Young Avenue, 72704, Fayetteville, AR, 4: Department of Chemistry and Biochemistry, University of Arkansas, 115 Chemistry Building, 72701, Fayetteville, AR, 5: Phytobiotech Inc., 525 des Prairies Boulevard, H7V 1B7, Laval, Québec, Canada, 6: Department of Chemical Engineering, University of Arkansas, 3202 Bell Engineering Center, 72701, Fayetteville, AR, Email: eclause@engr.uark.edu

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