𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Nuclear magnetic resonance studies of cesium-133 in the halophilic halotolerant bacterium Ba1. Chemical shift and transport studies

✍ Scribed by As'ad Sakhnini; Haggai Gilboa

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
128 KB
Volume
11
Category
Article
ISSN
0952-3480

No coin nor oath required. For personal study only.

✦ Synopsis

Ba 1 bacteria (Holomonas israelensis) were grown on different salt concentrations 0.2-4 M. When the cells were transferred to a medium containing 25 mM CsCl without potassium there was an uptake of cesium by the cells. The intracellular cesium signal was shifted from the cesium signal in the medium without the use of a shift reagent. The shift was depended on the salt concentration in the growth medium. The intracellular cesium shift showed a much smaller dependence on the concentration of salts in the medium than the extracellular cesium; the same results were detected for cells grown on a medium containing 25 mM CsCl. The cesium transport through the cell membrane was mostly by active transport. The cesium concentration in the cell was higher than that of the medium, $100 mM intracellular concentration compared to 25 mM in the medium. The first order constants for influx or efflux of cesium were from 2 Â 10 À4 and up to 24 Â 10 À4 /min for the different medium concentrations.

📜 SIMILAR VOLUMES

13C nuclear magnetic resonance studies o
13C nuclear magnetic resonance studies of saturated heterocycles: II—substituent effects on the 13C chemical shifts of methyl substituted 1,3-dithianes and their application to the determination of conformational equilibria
✍ Kalevi Pihlaja; Börje Björkqvist 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 310 KB 👁 1 views

## Abstract The ^13^C chemical shifts for 1,3‐dithiane and 9 methyl substituted derivatives are reported. Only three of the methyl‐1,3‐dithianes were conformationally anancomeric and hence the conformational equilibria must be taken into account when deriving the values of the different substituent

Carbon-13 magnetic resonance studies of
Carbon-13 magnetic resonance studies of cyclic compounds. 2. Carbon-13 chemical shift parameters for equatorial and axial substituents in cyclohexane: The substituents methyl, ethyl, isopropyl, methoxy and phthalimido
✍ H. Booth; J. R. Everett; R. A. Fleming 📂 Article 📅 1979 🏛 John Wiley and Sons 🌐 English ⚖ 359 KB

## Abstract Carbon‐13 chemical shift parameters for equatorial and axial substituents in cyclohexane are reported for methyl, ethyl, isopropyl, methoxy and phthalimido substituents. The usefulness of the alkyl parameters is demonstrated by the agreement between calculated and observed ^13^C shifts