Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 440078
Title Antioxidant potential of hydrolyzed polyphenolic extracts from tara (Caesalpinia spinosa) pods
Author(s) Chambi, F.; Chirinos, R.; Pedreschi Plasencia, R.P.; et al.,
Source Industrial Crops and Products 47 (2013). - ISSN 0926-6690 - p. 168 - 175.
DOI http://dx.doi.org/10.1016/j.indcrop.2013.03.009
Department(s) FBR Fresh Supply Chains
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) tropaeolum-tuberosum ruiz - betula-pubescens - tannic-acid - leaves - capacity - gallotannins - derivatives - sinensis - solvent - ability
Abstract The antioxidant potential of tara pod extracts rich in gallotannins submitted to chemical hydrolysis was evaluated. The increase in the release of gallic acid from the tara pod extracts during the hydrolysis process reached a maximum ratio of free gallic acid/total phenolics of 94.1% at 20 h, at this point, 100% hydrolysis degree (HD) was obtained. After 4 h of hydrolysis (38.8% of HD) the highest antioxidant capacity was obtained reaching values of 25.9, 23.8 and 8.8 µmol trolox equivalent/mg gallic acid equivalent measured by ABTS, FRAP and ORAC methods. Lipophilicity diminished from 0.8 to 0.3 (log P value). In addition, the antioxidant efficacy of 100 ppm total phenolics of hydrolyzates at 9 h (93.7% of HD) and 20 h showed to be significantly more efficient than a similar concentration of the synthetic antioxidant TBHQ to retard soybean oil oxidation. These results indicate that 4 and 9 h of chemical hydrolysis of tara pod extracts under the tested conditions are sufficient to obtain a product with good antioxidant properties to be used as an alternative source of antioxidants.
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