422 W. Dörries: Chemische Physiologie IDlö und 191(i. [ßß 



714. Reed, G. B. The significance of color changes iu oxidase 

 reagents. (Bot. Gaz. LXI, 1916, p. 430-432.) - Ref. in Bot. Centrbl. 

 CXXXVIII, 1918, p. 307-308. 



715. Reed, G. B. The measurement of oxidation potential 

 and its significance in the study of oxidases. (Bot. Gaz. LXI, 

 1916, p. 523-527, mit 2 Fig.) 



716. Reed, G. B. On tlie mechanism of oxidase action. (Bot. 

 Gaz. LXII, 1916, p. 53-64, mit 4 Fig.) 



717. Redd, G. B. The mode of action of plant peroxidases. 

 (Bot. Gaz. LXII, 1916, p. 233-238, mit 2 Fig.) 



718. Reed, G. B. The Separation of oxidase reactions from 

 the catalase reaction. (Bot. Gaz. LXII, 1916, p. 303-310, mit 3 Fig.) 



719. Reed, G. B. The relation betweeu oxidase and catalase 

 in plant tissnes. (Bot. Gaz. LXII, 1916 p. 409-412, mit 1 Fig.) 



720. Robbiiis, William J. Influence of certain salts and nutrient 

 Solutions on the secretion of diastase by Penicillium camembertii. 

 (Amer. Jouin. of Bot. III, 1916, p. 234-260.) - Summary: .,1. A method 

 of determiniiig diastatic action in Solutions of soluble starch by the precipit- 

 ation of the undigested starch and a part of the dextrins in acid alcohol is 

 described. 2. The addition of the Chlorides and the sulphates of potassium, 

 sodium, calcium and magnesium, singly, to a Solution of Merck' s soluble 

 starch in distilled water treated with carbon blaek, decreases the amount 

 of starch digested by Penicillium camembertii when the salts are present in 

 M/1000 concentrations. 3. The nitrates of potassium, sodium, calcium and 

 magnesium, when present singly in M/1000, M/10000, and, in the case of the 

 nitrates of calcium and magnesium, in M/100000 concentrations, in a Solution 

 of Merck's soluble starch in distilled water treated with carbon black, increase 

 the amount of starch digested by Penicillium camembertii. 4. The addition, 

 singly. of the nitrates of potassium, sodium, calcium and magnesium to a 

 Solution of Merck's soluble starch in distilled water treated with carbon 

 black decreases the amount of starch digested by Penicillium camembertii 

 per Unit of dry weight of mycelium when the salts are present in M/1000, 

 M/10000 and M/100000 concentrations. 5. The dihydrogen phosphate of 

 sodium and potassium, with the exception of M/1000 KH2PO4, do not decrease 

 the digestion of starch when present in M/1000, M/10000 and M/100000 

 concentrations. 6. Potassium salts inhibit the digestion of Merck's soluble 

 starch in distilled water treated with carbon black more than do sodium salts. 



7. A marked difference is noted betweeu the spreed with which Aspergillus 

 Oryzae and Penicillium camembertii digest soluble starch in the absence of 

 all added nutrients. and the rate of digestion by Mucor Rouxii and Fusarium sp. 



8. No evidence was found to connect potassium and calcium with diastase 

 formation. 9. Nitrogen may bear au intimate relation to the formation of 

 diastase by Penicillium camembertii."-- 



721. Rössler, R. Über Diastase. (Lotos. Prag. LXIV, 1915. p. 47 

 bis 48.) - Ref. in Bot. Centrbl. CXXXII, 1916, p. 47-48. 



722. Schweizer, K. Zur Kenntnis der Desaminierung. (Biochem. 

 Zeitschr. LXX\T:1I, 1916, p. 37.) — Verf. zeigt, dass die Tyrosinase die Eigen- 

 schaften und Funktionen einer Desaminase besitzt. 



