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Fluoreszierende Stoffe aus Drosophila melanogaster. 11. Mitteilung Chemische Eigenschaften des 2-Amino-6-hydroxy-pteridins

✍ Scribed by M. Viscontini; H. R. Weilenmann

Publisher
John Wiley and Sons
Year
1958
Tongue
German
Weight
391 KB
Volume
41
Category
Article
ISSN
0018-019X

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✦ Synopsis

A method for measuring diffusion coefficients in liquids is described. The diffusing substance S is radioactively tagged. At time zero it is concentrated at the bottom o f a vessel containing the diffusion medium M. During the experiment it moves through M by diffusion towards a GEIGER-MULLER tube. From the total number of counts registered as a function of time a time lag L is determined which is characteristic for the experiment. The value of the diffusion coefficient D is calculated from L and from the thickness d of M. For tristearin in triolein we find (with a confidence level of 95%) D = (7,57 & 0,83) * cm2/sec.

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Fluoreszierende Stoffe aus Drosophila me
Fluoreszierende Stoffe aus Drosophila melanogaster. 7. Mitteilung. Synthese und Eigenschaften des L-erythro-2-Amino-6-hydroxy-8-dihydroxypropyl-pteridins und des D-threo-2-Amino-6-hydroxy-8-dihydroxypropyl-pteridins
✍ M. Viscontini; H. Raschig 📂 Article 📅 1958 🏛 John Wiley and Sons 🌐 German ⚖ 343 KB

## Abstract Die Synthesen von L‐__erythro__‐2‐Amino‐5‐hydroxy‐8‐dihydroxypropyl‐pte‐ridin und D‐__threo__‐2‐Amino‐6‐hydroxy‐8‐dihydroxypropyl‐pteridin werden be‐schrieben und die Eigenschaften dieser beiden Verbindungen mit denjenigen des Drosophila‐Pteridins HB, verglichen.