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热激法修饰瑞士乳杆菌的参数优化与特性研究(Parameters Optimization and Properties for Lactobacillus helveticus by Heat-shock Treatment)
瑞士乳杆菌 热激处理 特性
2009/9/11
采用不同热处理温度(67、70℃)与时间(10、15、20s)对瑞士乳杆菌(Lactobacillus helveticus)进行热激修饰,研究处理前后与干酪加工相关的菌体特性,同时对热激修饰条件参数进行优化。研究结果表明,菌体经70℃、10?s热激处理后,菌体存活率、动态产酸能力、蛋白水解能力等指标符合热激要求,经修饰后的菌株适宜作为干酪促熟酶源。采用扫描电镜对细菌表面微观结构的观察结果表明,热...
The Influence of Phosphate Treatment on Chromosome Segregations and Tetrad Regularity and Using Tetrads in Determination of Regular Meiosis Diploid and Autotetraploid Meadow Fescue(Festuca pratensis Huds)
Phosphate Treatment Chromosome Segregations Tetrad Regularity Regular Meiosis Diploid
2009/1/23
This study was carried out under greenhouse conditions in 1994-1995. The influence of phosphate treatments (0, 1, 2, 3 and 4g P 2 O 5 /pot) on chromosome segregaiton at the first anaphase (AI) and tet...