Chemical and Physical Properties of Semen 5 1 



enables the lactic acid formation to continue (Ivanov, 1943; Lardy 

 and Phillips, 1943c; Mann, \9A5b\ Melrose and Terner, 1952, 1953). 

 But according to the last-named authors, washed bull spermatozoa 



30 



60 

 Min. 



90 



120 



Fig. 9. Effect offiiioride on the respiration and aerobic fructolysis of ram 

 semen. Each manometer flask contained 0-5 ml. whole semen diluted 

 with 1 -5 ml. Ringer-phosphate solution. Arrows show fructose content. 



(Mann & Luwak-Mann, 1948) 



incubated with fluoride and pyruvate under strictly anaerobic con- 

 ditions, are unable to convert pyruvic acid entirely to lactic acid 

 but instead, a dismutation takes place in which of two molecules 

 pyruvic acid, only one is reduced to lactic acid, and the other is 

 oxidized to carbon dioxide and acetic acid: 

 2CH3 CO COOH + H2O — > CH3 CHOHCOOH + CO^ + CH3COOH 

 5 



