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ID 42624
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Title Alternative
Findings on the Glucose Metabolism of Resting Bacteria Part 1. Changes of the Medium pH During the Glucose Metabolism of Resting Bacteria
Author
Furutani, Chieko
Abstract
By the aid of glass electrodes changes of medium pH were determined during glucose metabolism according to the combinations of various concentrations of phosphate buffer, glucose, and bacteria, using such resting cells as E. coli, Aerobacter aerogenes, Sal. typhi 57S and 57R, Sal. paratyphi A and B, Staphylococcus aureus, albus and citreus, and further the volumes of more important acids produced at differnet time measured. Next, the relationships between these volumes and “time-pH” curve were studied; and the following are the conclusions arrived at. 1. "Time-pH" curves in the case of E. coli present moderate descent on the whole whereas in the case of A. aerogenes they were steep; and the production of acetoin and lactic acid is very much but that of α-ketoglutaric acid lesser in the case of the latter. 2. In the cases of Sal. typhi 57S and 57R, the fall of pH in the former is steeper than that of the latter, and the production of lactic acid has been alomst twice that of the latter. 3. Of the bacteria tested, Sal. paratyphi A and Sal. paratyphi B was steep in the fall of pH and the production of lactic acid was greater though that of pyruvic acid is small. 4. The rates of fall of pH are greater in the order of St. aureus, St. albus and St. citreus; and St. aureus is influenced quite sensitively by the concentrations of phosphate buffer and glucose. Moreover, these changes in concentrations alter the order mentioned above. 5. Main cause of the fall of pH in the case of the test bacteria seems to be lactic acid followed by pyruvic acid.
Published Date
1957-08-30
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume69
Issue
issue8
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
2139
End Page
2155
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/69/8/69_8_2139/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/
language
日本語
Copyright Holders
Copyright© 岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma