924 
TABLE. 1 
Glucose as exclusive Amygdalin as exclusive 
organic food organic food 
| 
Composition of the culture liquid: 
50 cm.3 of tapwater, in which dissolved 0,159, NHyNO3, 0,15 %) KH,PO,, 
0,1 °/) magnesiumsulfate (crystallised). Temperature 33°, 
A. 2%, glucose (1000 mgr.) : | B. 20/, amygdalin (1000 mgr.) 
BENE TER -| Number of —— 
Assimilated | Obtained dry days after | Ascii Obtained dry 
| f inoculation | i 
glucose (mgr.) | Weight of _ amygdalin (mgr.) | es 
mould (mgr) | 
| 
1000 15: 0 6 ‚_670 = 315 
| | == 5 Me 
12 670,710 SES 298, 215 
n U 
16 635 2835| 251 
| | B25 
1000 | 242, 264 38 750 EME 271 
| ae 
| 42 680 wes 200 
| | aie 
| 95 | ripe deters = .214, 237, 203 
mine 
case sucrose can be assimilated without preceding dissociation into 
glucose and fructose. *) 
In this case, too, it might be supposed that the assimilation of 
amygdalin will not be preceded by a conversion into glucose, ben- 
zaldehyde and HCN outside the organism. 
Benzaldehyde and to a small degree HCN too, especially in high 
concentrations, diminish or stop the development of Aspergillus niger 
in nutrient liquids containing glucose. (Table I)). 
The solutions p and g were prepared as follows: 
p. 42,5 mgr. KCN dissolved in distilled water and filled up to 
100 em*. Added 10 em*. of 0,98 < '/,, Normal sulfuric acid. 
gq. 100 em°. of distilled water, added 10 em? of 0,981 < ’/,, 
Normal sulfuric acid. 
Both solutions were used gmmediately after their preparation. 
The purpose of the experiments 7,8 and 9 was only to demon- 
strate that the quantity of sulfurie acid added in N°. 4, 5, and 6 
could have no retarding influence. The phenomena of growth which 
were observed in N°. 2 after six days and in N°. 3 after ten days 
could not be attributed to the total evaporation of the benzaldehyde 
becanse the nutrient liquid of N°. 3 distinctly smelled of benzal- 
dehyde even after 10 days. 
1) Zur Physiologie der Essigbakterien, Centralbl. f. Bakteriologie, 2e Abt. Bd. 88, 
451 (L913). 
