Increasing use of X-ray absorption spectroscopy (edge and EXAFS) to determine the local structure of active sites of biological molecules has caused greater interest in and attention to the nature of X-ray damage and the integrity of the sample. In a complementary way, efficient X-ray photon collect
Preparation of aqueous standards for low temperature x-ray microanalysis
β Scribed by A. P. Reid; W. T. W. Potts; K. Oates; R. Mulvaney; E. W. Wolff
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 377 KB
- Volume
- 22
- Category
- Article
- ISSN
- 1059-910X
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β¦ Synopsis
Abstract
A technique, using Nuclepore polycarbonate membrane filters as a containing medium for very small volumes of ionic standard solutions, to produce homogeneous ice standards is described. The standards are suitable for use in a scanning electron microscope. The relationship between elemental Xβray counts and ionic concentration is found to be linear. The method is rapid and simple. Minimum detectable concentrations are given. Β© 1992 WileyβLiss, Inc.
π SIMILAR VOLUMES
A systematic procedure for the preparation of optimized sets of calibration solid standards for the x-ray Γuorescence analysis of ceramic materials is described. The matrix of the contents of the N analytes in the n standards (n P N) is calculated from an n Γ N experimental design matrix, and from t
The determination of ion concentrations within cells and sub-cellular compartments remains a difficult procedure, as the volumes to be analyzed are rather small. X-ray microanalysis is sufficiently sensitive, and has adequate resolution, to measure these concentrations. The major difficulties are re
## Abstract The Lang method has been used to investigate regularities and peculiarities of formation of Al single crystal dislocation structure in various stages of the stressβstrain curve at 77.3 and 4.2Β°K up to high strains. The low temperature deformation of crystals has been found to cause a sh