## Abstract Oxygenation is a major determinant of the physiological state of cultured cells. ^19^F NMR can be used to determine the oxygen concentration available to cells immobilized in a gel matrix by measuring the relaxation rate (1/T~1~) of perfluorocarbons (PFC) incorporated into the gel matri
A 1H-NMR method for determining temperature in cell culture perfusion systems
β Scribed by N. W. Lutz; A. C. Kuesel; W. E. Hull
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 560 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0740-3194
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β¦ Synopsis
Abstract
This report describes a noninvasive ^1^HβNMR method for measuring absolute temperatures (Β±0.2Β°C) in biological samples and, in particular, in cell culture perfusion systems, utilizing the linear temperature dependence of the water chemical shift relative to the temperatureβindependent shift of one of the components of the biological medium, e.g., pyruvate, acetate, or lactate. The effects of flow on temperature can be monitored and appropriate adjustments of the temperature controller can be made.
π SIMILAR VOLUMES
## Abstract NMR measurements of anisotropic diffusion were studied using a threeβdimensional randomβwalk model. It was found that the apparent diffusion coefficient can be expressed in a canonical form as the product of a diagonal matrix, an orthonormal rotation matrix, and a vector representing th