CONTENTS 



Further developments: phosphorylation and the nature of 



assimilation 91 



The nature of biocatalysis 98 



Comparative biochemistry 114 

 Industrial microbiology and the submerged culture method for the 



study of mould metabolism 130 



The classification of micro-organisms 138 



Variability of micro-organisms 146 



Epilogue 152 



TWO FUNERAL ORATIONS I 57 



O. Bottema 157 



A. van Rossem 159 



PART TWO 

 SELECTED PAPERS 



MICROBIOLOGY AND INDUSTRY 165 



Inaugural address delivered in the Dutch language on the occasion of 

 his accession to the Chair of Microbiology at the Technological Uni- 

 versity of Delft on January 18, 1922, under the title 'Microbiologic en 

 Industrie'. 



Translation of: ' Alicrobiologie en Industrie' . Rede uitgesproken bij de aanvaarding 

 van het ambt van Hoogleeraar in de Algemeene en Toegepaste Alicrobiologie aan de 

 Technische Hoogeschool te Delft op Woensdag 18 Januari 1922. Delft, 1922. 



UNITY AND DIVERSITY IN THE METABOLISM OF 



MICRO-ORGANISMS 186 



Address delivered in the Dutch language at the general meeting of the 

 Nederlandsche Chemische Vereeniging on April 24, 1924, under the 

 title: 'Eenheid en verscheidenheid in de stofwisseling der microben'. 

 Translation of: 'Eenheid en verscheidenlrid in de stofwisseling der microben'. 

 Chemisch Weekblad 2 1 , 266, 1924. 



die einheit in der biochemie (Mil H. J. L. Donker) 21 I 



1. Einleitung - 2. Die Zuruckfiihrung der Dissimilationsprozesse 

 auf katalytische Wasserstoffiibertragung, falls Zucker als Substrate 



