doctor's theses prepared under kluyver s direction 



1942 



p. b. rottier, Fluorometrische en spectrophotometrische bepaling van lacto- 

 flavine in micro-organismen (Delft, 20 Maart). 



1947 

 ch. c t. p. schnellen, Onderzoekingen over de methaangisting (Delft, 26 

 Maart). 



1948 

 a. kaars sijpesteijn, Cellulose-decomposing bacteria from the rumen of 

 cattle (Leiden, 15 December; promotor: Prof. Dr. T. H. van den Honert). 



1952 

 w. verhoeven, Aerobic sporeforming nitrate reducing bacteria (Delft, 21 Mei). 

 j. p. van der walt, On the yeast Candida pulcherrima and its pigment (Delft, 

 18 Juni). 



539 



