id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
afs-72010	Kreula, Matti; Rauramaa, Aino	Aspects of the metabolism of 14C-labelled compounds by cows on a protein-free feed with urea and ammonium salts as the sole source of nitrogen	1979	11	.pdf	application/pdf	4052	210	63	Introduction Professor A. I. Virtanen started to study the synthesis of milk proteins at the Biochemical Research Institute as early as 1958. In the same way as the synthesis of the amino acids of milk proteins from ammonia was followed by using urea and ammonium salts labelled with nitrogen-15, the synthesis of the carbon framework of protein, fat, lactose and citric acid from different energy sources by using preparations labelled with 14C was followed.	cache/afs-72010.pdf	txt/afs-72010.txt