372 W. Wendler: Chemische Physiologie 1917— 1919 mg 



t a t i o ii b y f u n g i , w i t h special reference to the decay o f 

 w o o (1. (Ann. Missouri Bot. Gard. 6, 1919, p. 93 — 134.) — Summary: „1. When 

 wood is sterilized by autoclaving it undergoes certain changes which must be 

 . onsidered when using wood for experimental purposes with wood-decaying 

 fungi. Among these changes are: a) a change in color; b) an increase in the 

 amount of reducing substances in the extract; c) an increase in the acidity of 

 the extract: d) an increase in the hydrogen ion concentration of the extract; 

 e) a change in resistance towards decay. — 2. Cellulose dissolving bacteria 

 play no important part in the decay of wood under natural conditions. 3. The 

 results from the decaying experiments tend to indicate that the rate of decay may 

 be niaterially increased by the presence of the ordinary saprophytic bacteria. 

 4. The influence of bacteria on fungi with reference to the rate of decay induced 

 by the fungi varies with the different fungi on different woods. 5. Further 

 experiinentation along this line is essential." 



733. Schmitz, Henry and Zeller, Sanford M. S t u d i e s in t h e 

 p h y s i o 1 o g y o f the fungi. IX. Enzyme action in Armülaria 

 mellea Vahl, Daedalea confragosa (Bolt) Fr., and Polyporus lucidus 

 (Leys.) Fr. (Ann. Missouri Bot. Gard. 6, 1919, p. 193—200.) — Summary: 

 „In Polyporus lucidus the presence of the following enzymes is demonstrated: 

 esterase, maltase, lactase, sucrase, raffinase, diastase, inulase, cellulase, hemi- 

 cellulase, emulsin, tannase, urease and trypsin and erepsin when fibrin is used 

 as a Substrate. — In Armülaria mellea the presence of the following enzymes 

 is demonstrated: maltase, lactase, sucrase, raffinase, diastase, inulase, cellulase, 

 hemicellulase, emulsin, urease, amidase, and trypsin and erepsin when fibrin 

 is used as a Substrate. — In Daedalea confragosa the following enzymes are 

 present: esterase, maltase, lactase, sucrase, raffinase, diastase, inulase, cellu- 

 lase, hemicellulase, emulsin, tannase, urease, and trypsin and erepsin when fibrin 

 is used as a Substrate. — A new method for the determination of ammonia 

 liberated by amidase is described. This method involves the application of 

 the indicator method for hydrogen ion concentration determination." 



734. Schönfeld, F. und Krumhaar, H.. unter Mitwirkung von Frl. Korn. 

 Die maltatische Spaltkraft der Hefen in Abhängigkeit 

 von Rasseneigenart und Ernährung. Die verschiedene 

 Maltasespaltkraft und Hefen. MaltatischeSpaltkraft der 

 Hefen im Bier. (Wochenschr. f. Brauereiw. 34, 1917, p. 149, 157, 165, 189.) 

 — Ref. in Ctrbl. Biochem. Biophysik 19, 1918, p. 492. 



735. Thomas, Arthur W. Eine bemerkenswerte Wirkung 

 von Bromiden auf dieBetätigung vonMalzamylase. ( Journ. 

 Amer. Chem. Soc. 39, 1917, p. 1501.) — Die Einwirkung von gereinigter Malz- 

 amylase auf lösliche Stärke wird durch Cloride, Nitrate, Sulfate und Phosphate 

 von Na und K proportional der Salzkonzentration gesteigert, dagegen durch 

 Bromide in kleinen Mengen gehemmt, bei steigender Konzentration dann ge- 

 fördert. 



736. Thoms, H. ÜberUrease, (Ber. d. Pharm. Ges 30, 1920, p. 175 

 bis 178.) — Eine Übersicht über die seit 1901 erschienenen Arbeiten über die 

 Urease. 



737. Windaus, A. Über Cholesterin. X X V. M i 1 1. (Ber. D. Chem. 

 Ges. 50, 1917, p. 133.) — Ref. in Ctrbl. Biochem. Biophysik 19, 1917, p. 227. 



738. Wohlgemut, I. Über neue Theorien der Dias tasebil- 

 d u n g undDiastasewirkung. (Biochem. Ztschr. 94, 1919, p. 213—224.) 



