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首页> 外文期刊>International journal of food science & technology >Drying kinetics, physico-chemical properties, antioxidant activity and phenolic composition of foam-mat dried germinated rice bean (Vigna umbellata) hydrolysate
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Drying kinetics, physico-chemical properties, antioxidant activity and phenolic composition of foam-mat dried germinated rice bean (Vigna umbellata) hydrolysate

机译：干燥动力学，物理化学性质，泡沫垫干发芽稻豆（Vigna Umbellata）水解产物的抗氧化活性和酚醛组合物

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摘要

This research was aimed to study physico-chemical properties and antioxidant activities of foam-mat dried germinated rice bean (Vigna umbellata) hydrolysate. Germination led to an increase in released phenolic content and antioxidant activity (DPPH radical scavenging activity and FRAP) of rice bean hydrolysate. The hydrolysate obtained from germinated rice bean (GRB) and non-germinated rice beans (NGRBs) was foam-mat dried at 60 and 70 °C. Semi-theoretical and empirical model could suitably describe the drying characteristic of foamed bean hydrolysate. Total phenolic content and antioxidant activities of foam-mat dried samples decreased with increasing air-drying temperature (P ≤ 0.05). Gallic acid, catechol and epicatechin were major phenolic compounds in foam-mat dried samples prepared from both GRB and NGRB. The higher phenolic content and antioxidant activities were found in foam-mat dried hydrolysate of GRB. Electron spin resonance spectrometry revealed that foam-mat dried rice bean hydrolysate showed a strong ability to scavenge free radicals, especially carbon-centred radicals.
机译：该研究旨在研究泡沫垫干发芽稻豆（Vigna Umbellata）水解产物的物理化学性质和抗氧化活性。发芽导致稻豆水解产物的释放酚类含量和抗氧化活性（DPPH激进清除活性和FRAP）增加。从发芽的稻豆（GRB）和非发芽的稻豆（NGRB）获得的水解产物是在60和70℃下干燥的泡沫垫。半理论和经验模型可以适当地描述泡沫豆水解产物的干燥特性。泡沫垫干燥样品的总酚类含量和抗氧化活性随着空气干燥温度的增加而降低（P≤0.05）。 Gallic acid，儿茶酚和EpicaTechin是由GRB和NGRB的泡沫垫干燥样品中的主要酚类化合物。在GRB的泡沫垫干燥水解产物中发现了较高的酚含量和抗氧化活性。电子自旋共振光谱显示，泡沫垫干稻豆水解产物表现出较强的释放自由基，尤其是碳的基团的能力。

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