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Investigators at Beijing University Describe Findings in Antioxidants (Polysaccharides extraction from Erythirna variegata, chemical characterization...

August 5, 2014



Investigators at Beijing University Describe Findings in Antioxidants (Polysaccharides extraction from Erythirna variegata, chemical characterization and its antioxidant activity)

By a News Reporter-Staff News Editor at Life Science Weekly -- Fresh data on Antioxidants are presented in a new report. According to news reporting originating from Beijing, People's Republic of China, by NewsRx correspondents, research stated, "The objective of this study was to determine the optimum conditions for extracting crude polysaccharides from the bark of Etythirna variegata (EVP) using response surface methodology (RSM). The quantitative effects of extraction time, temperature and the ratio of water to raw material on EVP yields were investigated using Box-Behnken experimental design."

Our news editors obtained a quote from the research from Beijing University, "The monosaccharide composition was analyzed by 1-phenyl-3-methy-5-pyrazolone pre-column derivatization high performance liquid chromatography, and the molecular weight was measured by high performance gel permeation chromatography. The antioxidant activities were also evaluated. By solving the regression equation and analyzing the data, the optimum conditions were obtained as follows: extracting time 1.52 h, extraction temperature 91.40 degrees C, and the ratio of water to raw material at 24.78. Under these conditions, the experiment yield was 2.064%, which well agreed with the predicted value. Chemical composition analysis indicated that EVP was mainly composed of mannose, rhamnose, galacturonic acid, glucose, galactose and arabinose, and the mean molecular weight of the two major fractions was about 26.8 kDa and 5.5 kDa, respectively. EVP had strong scavenging activity against DPPH radicals, potential reducing power and total antioxidant activity."

According to the news editors, the research concluded: "This study provides a scientific basis for the use of this herb in traditional medicine as an antioxidant."

For more information on this research see: Polysaccharides extraction from Erythirna variegata, chemical characterization and its antioxidant activity. International Journal of Biological Macromolecules, 2014;68():267-273. International Journal of Biological Macromolecules can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; International Journal of Biological Macromolecules - www.elsevier.com/wps/product/cws_home/525446)

The news editors report that additional information may be obtained by contacting C. Zhang, Beijing Univ Tradit Chinese Med, Beijing 100102, People's Republic of China. Additional authors for this research include Y.M. Zhou, Z.L. Sun, J. Feng and Y.Z. Wang (see also Antioxidants).

Keywords for this news article include: Asia, Antioxidants, Beijing, Protective Agents, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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