Ordinary lactic acid

Ordinary Lactic Acid.—As Kolbe 5 had already discovered, the concentrated solution of the potassium salt gave carbon dioxide and acetic aldehyde. The investigators above mentioned also observed the presence of some formic acid. When the solution surrounding the positive pole was kept slightly... 

SYNS ACETONICACID ETHYLIDENELACnC ACID 1-HYDROXYETHANECARBOXYLIC ACID 2-HYDROXYPROPANOIC ACID 2-HYDROXYPROPION-IC ACID (X-HYDROXYPROPIONIC ACID KYSELINA 2-HYDROXYPROP.ANOVA KYSEUNA MLECNA (CZECH) dl-LACnC ACID MILCHSAEURE (GERMAN) MILK ACID ORDINARY LACTIC ACID PROPANOIC ACID, 2-HYDROXY- PROPEL PROPIONIC ACID, 2-HYDROXY- RACEADC LACTIC ACID SY-83... 

Mr. Wislicenus has, in fact, recently announced that he has found an active acid in meat. This acid does not have, as has been believed, the constitution of the ethylene lactic acid but it is according to this author a physical isomer of the ordinary lactic acid. Indeed one cannot see that the ethylene lactic acid can be active, for the carbons of the radical are each one combined with two atoms of hydrogen, as the formula shows CH2 OH CH2 GOOH. We see also that the propylene glycol and the iodopropionic acid which are derived from the active lactic acid will preserve the rotatory power, but it will not be the same with the glycerine which one can derive from it, for in that case the central carbon atom is united with the two equal radicals CH2 OH,... 

Ps actic acid differs from its two isomeres in that its solutions are dextrogyrous, and the solutions of its salts are Imvogyroua. The specific rotary power of the acid is [ ] = -h3 .6 that of the zinc salt [a] = —7.6 and of the calcium salt (a] = --3 8. Its products of decomposition are the same as those of ordinary lactic acid. 

Milk directly from the cow was incubated for 18 hours at 21° C. and then for 48 hours at 37° C. This allowed at first tiie rapid development of the ordinary lactic acid organisms inhibiting the coli or other gas forming types. At the higher temperature and in the presence of the lactic acid already developed the Bacillus bulgancus, if present, rapidly developed. With three to five consecutive inoculations practically pure cultures were obtained. 

Although typical formulse have been and still are of great service, many cases arise, especially in treating of the more complex organic substances, in which they do not sufficiently indicate the relations between the atoms which constitute the molecule, and thus fail to convey a proper idea of the nature of the substance. Considering, for example, the ordinary lactic acid, we find its composition to be CjHbOs, which, expressed typically, would be... 

HYDROXYPROPANOIC ACID 2-HYDROXYPROHONIC ACID tt-HYDROXYPROPIONIC ACID KYSELINAMLECNA /-LACTIC ACID MILCHSAURE MILK ACID ORDINARY LACTIC ACID RACEMIC LACTIC ACID... 

Glycolic acid—Ordinary lactic acid—Sarco-lactic acid—... 

Oenanthylic Acid see Heptanoic Acid Oil Of Mirbane see Nitrobenzene Olefiant Gas see Ethylene Oleic Acid Ordinary Lactic Acid see Lactic Acid... 

W. Heintz and Wislicenus isolated a base (now known as oxytetraldin, CgHisNO) by gently heating aldehyde-ammonia, and showed that Liebig s supposed aldehydic acid (see p. 357) has no existence. Liebig obtained lactic acid from flesh-juice, in which it had been discovered by Berzelius (see p. 151), but both found that it differs in some respects from ordinary lactic acid. This was confirmed by H. Engelhardt and by Heintz. The acid from flesh was called sarcolactic acid Heintz called it paralactic acid. The calcium salts of the two acids crystallise with different amounts of water. Kolbe said the cause of the difference between the two acids was not yet ascertained. 

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