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

The production technologies of high fructose, colorless, acid free concentrated apple juice were studied to acquire high fructose content apple juice by the experiment of sucrase digestion, resin decolourization and de-acidification. The best conditions of sucrase digestion, decolourization and de-acidification were determined by orthogonal experiment. The results suggested that the optimal condition of sucrase digestion were that pH was 4.5, apple juice concentration was 120g/L, sucrase concentration was 7mg/kg and temperature was 55℃; Decolourization condition of resin XDA-5 were that pH was 3.5, concentration of apple juice was 200g/L, temperature was 50℃ and fluid velocity was 150mL/h; The best absorption condition of fruit acid by resin D380 were that apple juice concentration was 300g/L, fluid velocity was 180mL/h and temperature was 25℃.