228 



The Biochemistry of Semen 



Echinus esculentus (contd). — 

 acid, 104; lipids and phospho- 

 lipids, 125, 129; sterols, 125; 

 fatty acids, 125; adenosine tri- 

 phosphate, 155 



Echiurus, creatine, 180 



Egg-membrane lysin in molluscs, 95 



Egg-surface liquefying agent, and 

 androgamone, 23, 71 



Egg-water, agglutinating and ac- 

 tivating effects, 70-6, 114 



Egg-yolk, diluents, 80; eflfect on 

 sperm respiration, 117; glucose 

 content, 157 



Ejaculate, species characteristics, 2; 

 fractions, 9, 28, 35-8; frequency, 

 34 



Ejaculatory duct, obstruction, 137- 

 8 



Electrical impedance changes, 41-2 



Electric stimulation of ejaculation, 

 38,67 



Electro-conductivity, 41 



Electrolytes, 18, 23, 25, 32-3; inter- 

 relations, 42-4, 73-7, 188, 192 



Electron microscopy, application 

 to sperm, 11, 14-15 



Electrophoresis of seminal pro- 

 teins, 112 



End-piece, characteristics, 15 



Enolase, 158 



Enzymes, in seminal plasma, 15-29, 

 114^23, 167, 170-3; in sperm, 5, 

 13, 83-9, 117, 151-9, 173-4, 181- 

 2; release from damaged sperm, 

 10, 64, 83, 94-5; in metabolism, 

 43-53, 128-30, 149-59, 187-8; 

 aflfecting sperm-fibrils, 14 



Epididymal spermatozoa, 6-8, 24- 

 5, 82, 86-8, 125, 129, 152-4, 

 177-80 



Epididymis, as storage organ for 

 sperm, 6, 15,25, 35-7, 82, 1 54, 1 78, 

 185; secretion, 25, 35-6; ripening 

 effect, 25, 154; dependence on 

 androgen, 67; oxygen tension, 61; 



citric acid, 185; dehydrocholes- 

 terol, 133 



Epinephrine (adrenalme), 181-2 



Ergothioneine, in semen and acces- 

 sory secretions, 15, 20-3, 36-7, 

 175-8, 191; counteraction of 

 thiol-reagents, 58, 176-8; role, 

 176-8; biogenesis, 178 



Esocine, 106 



Esox lucius (pike), nucleic acid, 105 



Ethanol, effect on sperm, 56; 

 excretion in semen, 56 



Ethylenediamine tetra-acetate, as 

 metal-binding agent, 76 



Ethylquinone, effect on sperm, 57 



Evaluation of semen quaUty, 38-53, 

 78, 92-3, 138 



Exhaustion effect, 34 



Extraneous factors, influence on 

 sperm, 54-82 



Fatty acids, in semen, 125-7; 

 utilization, 52 



Fatty aldehydes, in acetal phos- 

 pholipids, 126 



Female prostate, 187 



Female reproductive tract, role in 

 sperm transport, 8-9 



Fertility, evaluation through semen 

 analysis, 3, 38-53, 78-82, 92-5, 

 138; after irradiation, 58-60; 

 temperature effects, 62-66; of 

 epididymal sperm, 6-8; and 

 artificial diluents, 79-82; relation 

 to 'lytic' agents and hyaluroni- 

 dase, 95-7; in malnutrition, 148- 

 9, 172-3, 191; contraception and 

 'anti-fertihty factor', 55-8, 79- 

 80, 97-8 



Fertilization, 8-10, 69-73, 95-8 



Fertilizin, 70-1 



Feulgen reaction, 11, 100-1, 126-7 



Fibrils, in spermatozoa, 13-14 



Fibrin, seminal, 114 



Fibrinogenase, 17, 29, 114-15 



Fibrinolysin, 17, 29, 114-15 



