100 



T. E. PAVLOVSKAYA AND A. G. PASYNSKII 



phenylalanine and isoleucine, mixtures of cresol with a phosphate buffer (0-067 

 M-KH2PO4 + 0-067 M-Na2HP04 (i : i)). 



In some experiments supplementary measurements were made on the chro- 

 matogram with a microphotometer. Fig. i shows a microphotogram of amino 

 acids synthesized in a mixture of formaldehyde and ammonium nitrate. 



Fig. I. Microphotogram of mixtures of amino acids. 



Fig. 2. Chromatograms of amino acids synthesized by the 

 action of ultraviolet rays. 



In the formaldehyde-ammonium chloride mixture after irradiation with 

 ultraviolet rays (at a temperature of 40-45'' and pH 1-5-2) it was estabUshed 

 that the following amino acids were present : basic amino acids, serine, glycine, 

 glutamic acid, alanine, valine and also phenylalanine (Fig. 2). 



