Gamma-irradiation induced changes in microbiological status, phenolic profile and antioxidant activity of peanut skin

被引：96
作者：
de Camargo, Adriano Costa [1 ,2 ]
Bismara Regitano-d'Arce, Marisa Aparecida [2 ]
Gallo, Claudio Rosa [2 ]
Shahidi, Fereidoon [1 ]
机构：
[1] Mem Univ Newfoundland, Dept Biochem, St John, NF A1B 3X9, Canada
[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Dept Agrifood Ind Food & Nutr, BR-13418900 Piracicaba, SP, Brazil
来源：
JOURNAL OF FUNCTIONAL FOODS | 2015年 / 12卷
基金：
加拿大自然科学与工程研究理事会; 巴西圣保罗研究基金会;
关键词：
Microbiology; LDL-cholesterol oxidation; DNA strand breakage inhibition; HPLC-DAD-ESI-MSn; Polyphenol; Proanthocyanidin; SCAVENGING ACTIVITIES; INDUCED ENHANCEMENT; IN-SHELL; A-TYPE; RADIATION; DAMAGE; SALMONELLA; POLYPHENOL; PROCYANIDINS; ANTHOCYANIN;
D O I：
10.1016/j.jff.2014.10.034
中图分类号：
TS2 [食品工业];
学科分类号：
0832 ;
摘要：
The effects of gamma-irradiation on the microbial growth, phenolic composition, and antioxidant properties of peanut skin were evaluated. Gamma-irradiation at 5.0 kGy decreased the microbiological count of the product. Total phenolic and proanthocyanidin contents, ABTS radical cation, DPPH radical, H2O2, and hydroxyl radical scavenging capacities as well as the reducing power of the sample were increased upon gamma-irradiation in both the free and insoluble-bound phenolic fractions. However, a decrease in the esterified phenolics was noticed. The bioactivity of the free phenolics against in vitro human LDL-cholesterol oxidation and copper induced DNA strand breakage was improved upon gamma-irradiation. Phenolic acids, flavonoids, and proanthocyanidins were positively or tentatively identified by HPLC-DADE-ST-MSn and their distribution was in the decreasing order of free > esterified > insoluble-bound forms. Procyanidin dimer A was increased in all phenolic fractions, whereas procyanidin dimer B decreased. Gamma-irradiation induced changes may be explained by molecular conversion, depolymerization, and cross-linking. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：129 / 143
页数：15
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