xii CONTENTS 



Biotin 343 



Folic acid 344 



Vitamin B^o 345 



Ascorbic acid 347 



Other water-soluble factors 349 



Vitamin A 351 



Vitamin D 355 



Vitamin E 358 



Vitamin K 359 



Vitamin assays 361 



Vitamins and nutrition 365 



15 Mineral metabolism 368 



Nutrition 368 



Other essential inorganic materials 399 



Roles of essential elements 401 



76 Feeds 406 



General composition 407 

 Feeds of plant origin 409 

 Feeds of animal origin 415 

 Antibiotics and vitamins 420 

 Hormones 421 

 Elements 422 



17 Digestion 423 



Salivary digestion 424 

 Gastric digestion 425 

 Intestinal digestion 432 

 Detoxication 440 



78 Carbohydrate metabolism 442 



Glycolysis and glycogenesis 443 

 Metabolism of other carbohydrates 447 

 Metabolic interrelationships between carbohydrate, fat, and 

 protein 451 



