首页|超滤精制对芝麻蛋白水解液ACE抑制活性和抗氧化活性的影响

超滤精制对芝麻蛋白水解液ACE抑制活性和抗氧化活性的影响

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以芝麻饼粕为原料,采用超滤技术制备功能多肽,研究超滤对蛋白酶水解肽的氨基酸组成、肽谱、降血压和抗氧化功能特性等影响.结果表明:经截留分子质量为10 ku和3 ku的超滤膜过滤,所得到的3个组分(相对分子质量分布>10 ku、3~10 ku和<3 ku)的必需氨基酸质量分数分别为15.6%、14.9%、15.0%,显著高于未经超滤(12.9%),分子质量分布在3~10 ku组分的总氨基酸质量分数达53.1%,比未经超时提高了7.6%;其中分子质量分布为3~10 ku和<3 ku酶解液的IC50值分别降低了6.6%和7.9%,血管紧张素转化酶(ACE)抑制活性显著提高;分子质量分布为3~10 ku和<3 ku酶解液的DPPH·自由基清除率IC50值与未经超滤时均降低了8.6%,羟自由基清除率分别降低4.20%和26.57%,抗氧化活性显著提高.
Effects of Ultrafiltration on ACE-Inhibitory and Antioxidant Activities of Sesame Protein Hydrolysates
In order to explore the application of ultrasonic and microwave technology in sesame cake ACE inhibitory peptide preparation,sesame cakes were treated with ultrasonic,microwave and ultrasonic-assisted enzymolysis to study the effect of power,time and enzyme dosage on inhibition rate of ACE.The optimal conditions of ultrasonic treatment were power of 4 W/mL,time of 10 min and alkaline protease of 1 300 u/g,and IC50 value of ACE inhibitory peptide was 2.81 mg/mL.The optimal conditions of ultrasonic-assisted enzymolysis were power of 0.5 W/mL and alkaline protease of 1 700 u/g for 15 rain,and IC50 value of ACE inhibitory peptide was 2.96 mg/mL.The optimal conditions of microwave treatment were power of 1.33 W/mL for 5 rain,and IC50 value of ACE inhibitory peptide was 2.81 mg/mL.

ultrafiltrationsesame cakepeptideACE inhibitory activityantioxidant activity

王振斌、裴娟娟、闫景坤、马海乐、王林、姜美花

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江苏大学食品与生物工程学院,镇江212013

超滤 芝麻饼粕 多肽 ACE抑制活性 抗氧化活性

苏北科技发展计划江苏高校优势学科建设工程资助项目江苏省高等学校大学生实践创新训练计划江苏大学大学生科研立项资助项目

BC2012421苏政办发[2014]37号201310299019Z12A018

2015

中国粮油学报
中国粮油学会

中国粮油学报

CSTPCDCSCD北大核心
影响因子:1.056
ISSN:1003-0174
年,卷(期):2015.30(8)
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