( 605 ) 



nai'v iiiixtnres. If diiriiiü' llio ciTslallisalion S(M., in llio solution (l(ies 

 nol vicld SCI, accord inu' to tli(^ (Mjuatiou 



3S(M, = SCI, 4- S./M._, 



solid SCI., ought to he found soniowhoie on tli(> way to coniplctu 

 soliditication. 'Phis point could not ho decided. 



Chemistry. — "■ Enzi/nK/cfioiis coiisuU'red fis i^iivUihi-'ni in a honw- 

 (ji'iioiis sjisfiiii.'^ \\\ A. W. YissKR. (Coniniunicated Ijy Prof. 

 C. A. LoBRv DK Hruyn). 



((lominnnicated \n the meet ins,- of .laimary !50. 11)04.) 



J. A munher of facts exist ^vhicll indicate that the reactions 

 created by enzymes are re\ersible. Croi't-Hit,i,') succeeded in i)artly 

 converting a concentrated solution of glucose into a disaccharide with 

 the aid of uialtase and reversihly the disaccharide into glucose. He 

 supposed it to he maltose l)ut aftei-wards Km:mkri,in(; -) ])roved it to 

 be isomaltose ; the fact however remai)is that maltase may cause 

 a reversible formation of polysaccharides, llecently, (htoFT-Hiu. ^) 

 has further proved that there is formed from glucose by means of 

 maltase a new crystallised biglucose called revertose, he thinks 

 it probable that also maltose may be formed '). Kastle and 

 LoEWENHAKT '") and afterwards Hanriot ") fonnd that the fat-splitting 

 enzyme lipase is capable of resolving bntyricester into butyric 

 acid and alcohol and on the other hand of forming the ester from the 

 decomposition products. Emmert-ing ') noticed the regeneration ofamygd- 

 alin from nitrilgliu-oside-amygdalate and glucose under the intluence of 

 maltase. E. Fischer and Frankt-and Armstrono ") prepared with the 

 aid of Kefir-Iactase a disaccharide from a mixture of galactose and 

 glucose called isolactose, which up to the present coidd not be 

 isolated in a state of purity. Flic same authors also found that 

 kelir-lactase forms a. disaccharide from glucose alone and that 

 eniulsin does the same from a nuxture of glucose and galactose. 



1) J. C. S. 73, (334 (1898). 

 3) Ber. 34, 600, 2^206 (1901). 

 3) J. C. S. 83, 578 (1903). 



■') All these experiments show thai the siibslance supposed to he maltase still 

 contains other ferments. 



i) Am. (Jh. J, 26, 533 (1901). 



6) (;. R. 132, ^lU (1901). 



7) Ber. 34, 3810 (1901). 



8) Ber. 35, 3151 (190^>j. 



