摘要: 本文研究了超声波破碎法从干酵母中提取乙醛脱氢酶的实验，并通过单因素实验研究了料液比、样品处理量、提取液pH、超声功率、超声全程时间对低糖型酵母中ALDH提取工艺的影响，得到一组最优的提取工艺：料液比1:4、处理量20 ml、提取缓冲液的pH值8.0、超声功率300 W、超声全程时间16 min，在此最佳工艺下获得的ALDH粗酶提取液的酶活力高达3.56U/mL。超声破碎法得到的ALDH粗酶液经过盐析、透析、Sephadex G-75柱层析后，其纯化倍数可达2.562，比活力达到1.24。
Abstract: This paper studies the extraction of acetaldehyde dehydrogenase from instant yeast by ultrasonic fragmentation method. And studied the solid-liquid ratio, sample processing, pH, ultrasonic power, the time of ultrasonic influence on the extraction process of instant low sugar yeast through single factor experiment. That gets a set of optimal extraction process: the ratio of material liquid is 1:4, 20 mL capacity, extraction buffer pH 8.0, 300 w ultrasonic power, ultrasonic time of 16 min. Under the optimum process, the enzyme activity of ALDH crude enzyme is up to 3.56 U/mL. The crude enzyme of ALDH liquid used ultrasonic broken method through salting out, dialysis, Sephadex G-75 column chromatography, the ratio of the purified is 2.562, and the specific activity reached 1.24.