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A Series of Brief Papers by Louis Pasteur Read at the Meetings of the Société Chimique de Paris.

Pasteur, Louis

Published by Hachette., Paris, Fr., 1861
From Gadshill (Providence, RI, U.S.A.)

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Whole volume: 124 pp. 8vo. Disbound, but laid in covers for the 1857-61 Collection of the Bulletin. White paper spine with marbled paper covered boards. Leather labels on spine with gilt titling and decoration. A series of brief papers by Louis Pasteur read at the meetings of the Société Chimique de Paris, of which he had just been named President. This society, which had recently (1857-58) been formed by a group of young chemists, often reflected newer and more molecularly related research. These papers by Pasteur include (pp. 30-1)a report that lactic and butyric acid fermentations do not require oxygen; "Sur les ferments" (pp. 61-3), in which Pasteur reports on the fermentation of beer, as in that of lower plants, a strong effect of oxygen in inhibiting fermentation and generating carbon dioxide, a new theory of fermentation resulting. His studies were still in progress then; "Sur la fermentation acétique" ( pp. 94-6), in which Pasteur reports further studies on acetic fermentation. Here the presence of oxygen stimulates the metabolism of alcohol to acetic acid; Pasteur comments (pp.103-04) on the just previous paper by M. H. Carlet (pp. 101-03) that the chemical transformation of various acids, succinic et al, yields products like tartaric acid,which exists in two forms, an (l-) and a (d-) forms. As he had shown with tartaric acid in 1847-48, these two forms, optical isomers of one another, differ in the submolecular arrangements of constituent atoms. In fact crystals of the enantiomorphs differ in physical shape. Pasteur prepared crystals of each of the chiral forms and showed that he could separate these crystals optically, thus preparing pure l-tartaric acid. The racemic mixture of the two forms of tartaric acid are not the same as mesotartaric acid, which is not chiral, but a product of chemical (not biochemical) synthesis. L-tartaric acid is the natural form and the specific chiral form is preserved in biological metabolism. This was a major contribution to chemistry by Pasteur; on pp. 115-16, Pasteur again comments on the just previous paper, He points out that his previous work had shown a change in optical rotation of solutions of arginine when the medium was changed from acidic to alkaline. He believes this property of optical rotation in relation to pH to be a generalizable property and to explain the previous authors results in study of optical rotation in different acids. Disbound from a larger volume, but enclosed in its original covers. Else, Very Good. Bookseller Inventory # 11526

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Bibliographic Details

Title: A Series of Brief Papers by Louis Pasteur ...

Publisher: Hachette., Paris, Fr.

Publication Date: 1861

Edition: First Edition..

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