在检测细菌的生理生化反应时,经常要用到糖发酵实验。该实验的基本原理是:配制以某种糖为碳源的培养液,加入酸碱指示剂,装入试管中,同时在管中放一个倒置的特小号试管,接入菌种。培养后若管中液体变黄,说明该细菌发酵相应的糖产酸;若小倒管中有气泡说明 In the detection of bacterial physiological and biochemical reactions, often to use sugar fermentation experiments. The basic principle of the experiment is as follows: Prepare culture medium with some sugar as carbon source, add acid-base indicator and put it in the test tube, put an inverted special small test tube in the tube and connect the bacteria. If the tube after training liquid yellowing, indicating that the bacterial fermentation of the corresponding sugar acid; if the small tube bubble Description