| Autor: |
C. H. Castell |
| Rok vydání: |
1941 |
| Předmět: |
|
| Zdroj: |
Stain Technology. 16:33-36 |
| ISSN: |
0038-9153 |
| DOI: |
10.3109/10520294109106193 |
| Popis: |
Flooding p-aminodimethylaniline monohydrochloride on fat emulsion agar inoculated with certain types of microorganisms frequently results in marked color changes in the fat globules. It is shown in this paper that the colors result from the increased solubility in fat and fatty acids of this dye as it becomes oxidized. Some of the acids oxidize the dye on contact and therefore color very quickly; fats become colored only when some other agent oxidizes the dye. The characteristic color reactions with certain fats and fatty acids are described for various degrees of oxidation of the dye; this suggests the explanation for the colors observed in the inoculated globules flooded with this dye. A table is included showing the colors in globules of oil that were inoculated with 39 pure cultures of bacteria. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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