ees Notes. 
~A new aromatic fungus. — We have repeatedly discussed articles on the smell of 
_ fungi*) and would now mention a treatise by F. Bataille and L. Joachim), containing 
F a description. of a new Cortinarius species, C. suaveolens. Bataille et Joachim. It has 
_ been discovered in the woods of Fontainebleau and is related to C. calochrous and 
=, 7 
BC. dibaphus. both odourless, whereas this new species has a strong odour of orange — 
' blossom, which remains until the fungus is quite dried up. (. suaveolens distinguishes — 
_ itself also in other ways from the other two species Us as may ‘be peauced from 
_ the description and illustrations in the original. 
As to an attempt to distinguish the physiological forms of the Ose tree, see page 7 
_ of this Report. se ea ta 7 ey, 
4 
2 EB - Bayes -physiological Notes. 
-on the isolation of peroxidase from horse-raddish. Although it is not known, whether 
this peroxidase acts a part in the formation of the essential horse- raddish’ oil, we 
wish to discuss the treatise, as it gives an example of the methods by which such > 
- sensitive substances have to be isolated. It is not at all impossible that quite a number 
. of essential oils are formed ‘by decomposition of glucosides or such-like bodies, under 
- for instance wintergreen oil, bitter almond oil, §c. These glucosides have not been 
_ isolated so far and little is known as to the enzymes. — 
a -Willstatter and Stoll point out that the preparation of the enzymes appears to be 
_ very different from the isolation of natural colouring matter, but that these tasks have 
_ after all remarkable relations. Peroxydase as well as chlorophyll are substances 
which, for lack of groups capable of reacting, do not offer any points of attack in 
order to isolate them chemically. Both are sensitive against acids, and although they 
do not possess any basic properties they are attacked by acids to such a ee that 
all the active groups are destroyed. 
a0 
0.2 per cent. of the fresh and 1 per cent. of the dried leaves. 
. There are three important points with regard to the Bicuelaion of the peroxydase 
which we only wish just to mention. 
1. Dialysis in the plant material. During this process about 20 ‘per cent. of the 
enzyme is lost. 
2. The adsorption in the plant ee when Menten with oxalic acid. This 
operation is carried out with a carefuly ajusted quantity of oxalic acid, as an excess 
thereof ‘would destroy the peroxydase. The slices of horse-raddish root are placed 
_into the dilute acid for 4 to 6 hours. As in this treatment the regulating action of 
the live protoplasm is paralyzed and that of the enzyme set free, ‘the resolution of 
as otherwise through grating. 
a Cieew, for instance Reports October 1916, 100; October 1918, 108. 2) Bull. Sciences pharmacol. 25 
918), 350. — %) Liebig’s Annalen 416, (1918), Ys 
be 
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_ NOTES: on "SCIENTIFIC. RESEARCH. One Od Coad (0 
s A publication a A. Willstatter and A. Stoll 3) contains notorthy communications 
the influence of enzymes or other substances acting as catalysts. We would mention : 
The concentration of the enzymes in the plant is more cniatourable than with the — 
pigments. The contents of peroxydase amounts ‘to only 0.035 in fresh and to é 
0.14 per cent. in dried horse-raddish, whereas for instance chlorophyll constitutes “ae 
the formerly protected bodies begins; mustard oil is set nee in considerable quantity, — 
ot 
