摘要
以贵州兴仁薏仁米作为试验材料,研究了薏仁米贮藏过程中品质的变化。结果表明,在为期1年的贮藏过程中,薏仁米的颜色、气味、主要成分及关联指标变化明显,表明薏仁米品质随贮藏时间的延长而下降。薏仁米色泽随着贮藏时间的延长,由最初的乳白色、有光泽,逐渐变暗偏黄且带有灰色;气味也由最初的甜香气,最终呈哈败味。在贮藏期间,薏仁米的蛋白质、淀粉和灰分含量的变化无显著差异,但水分含量逐渐降低(降低37.06%),脂肪含量减少明显(减少15.00%);薏仁米贮藏过程中脂肪酸值、过氧化值、电导率、丙二醛含量升高,分别增加了272.56%,416.21%,123.78%,99.91%,脂肪酶活性呈先升后降的趋势。薏仁米的脂肪氧化是其品质变化的主要原因,关联指标如肪酸值、过氧化值、丙二醛值、脂肪酶活动度和电导率的变化,均灵敏地反映其品质的下降。
The aim of the study was to explore quality of coix seed grown in Xingren,Guizhou(China)during storage.The results indicated that,color,ordor,main contents and correlate indexs of coix seed changed significantly during storage,which reflect the quality of coix seed decreases.Results:the color of coix seed changed with storing time lengthening.Original milky white,glossy coix seed became dimmed with yellowish and grayish with storing period lengthens.The odor was also from the original sweet aroma,which was ultimate rancidity.The rancidity of coix seed bacame stronger with storing time lengthening.During storage period,there was no significant difference in protein,starch and ash contents,but moisture content declined gradually(decreaesd 37.06%),fat content reduced obviously(reduced 15.00%).Fatty acid value,peroxide value,electric conductivity,malondialdehyde and reducing sugar content of coix seed increased with storing time lengthening,and increased 272.56%,416.21%,123.78%,99.91% and 5.83%,respectively.While,the acidity and lipase activity increased at first and then decreased.The fatty oxidation of coix seed was the main cause of the decrease in quality.Changes in fatty acid value,peroxidation value,malondialdehyde content,lipase activity and electric conductivity sensitively reflect the fat oxidation of coix seed with storing period lengthens,and reflect the decline of coix seed quality.
作者
栾琳琳
卢红梅
陈莉
杨凤仪
吴煜樟
牟灿灿
LUAN Lin-lin;LU Hong-mei;CHEN Li;YANG Feng-yi;WU Yu-zhan;MOU Can-can(School of Liquor and Food Engineering,Guizhou University,Guiyang,Guizhou 550025,China;Guizhou Key Laboratory of Fermentation Engineering and Biopharmacy,Guizhou University Guiyang,Guizhou 550025,China)
出处
《食品与机械》
北大核心
2019年第3期149-154,共6页
Food and Machinery
基金
贵州省科技计划(重大专项)(编号:黔科合重大专项字[2014]6023子课题2-1项目)
关键词
薏仁米
贮藏
品质变化
coix seed
storage
changes of quality
