ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

Two kinds of persimmon vinegar after accomplishing fermentation with natural and conventional fermentation ways was aged for 180 days at 3～6℃. Aroma components in the two kinds of persimmon vinegar were extracted by solid phase micro-extraction (SPME), then separated and analyzed by GC[CD*2]MS. About 63 kinds of volatile compounds were identified from persimmon vinegars with two different fermentation ways, respectively. Acids, esters, alcohols, hydrocarbon, aldoketones, phenols and a few other compounds exist in the volatile compounds. The content of esters, alcohols and hydrocarbon in volatile components from persimmon vinegar fermented with conventional way is 33.78%, 32.38% and 1.08%, respectively, and is bigger than with natural fermentation way. The content of acids, aldoketones and phenols fermented with natural fermentation way is 61.25%, 9.66% and 6.13%, and is bigger than fermented with conventional way. The sensory quality of persimmon vinegar fermented with conventional way is better than fermented with natural fermentation way.