## Abstract A simple and rapid procedure for the preparation of [16,16β^2^H~2~]βand [16,16,17β^2^H~3~]testosterone of high isotopic purity is described. [16,16β^2^H~2~]DehydrOepiandrosterone is obtained by baseβcatalysed exchange; reduction of the 17βketo group using lithium aluminium hydride or li
A Simple Procedure for the Rapid Determination of the Bulk Constituents of Certain Insulation Materials
β Scribed by Keith K. Koehler; Peter F. Lott
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 59 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0026-265X
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β¦ Synopsis
The analysis of thermal insulation materials by optical microscopy has centered on the identification of fibrous constituents and not the bulk insulation. To enhance the identification of insulation, procedures were developed using chemical spot tests and microscopical observations that included dispersion staining to characterize the matrix material.
π SIMILAR VOLUMES
output power is lower, as predicted by both approaches. When the reflectivity is small, the oscillation energy is small. Thus, the lasing wavelength has a lower number of photons available for feedback and energy accumulation. At higher reflectivities, although the energy within the cavity is large,
## Abstract We compared cytomegalovirus (CMV) isolation in tissue culture and viral DNA detection by DNA:DNA hybridization in 60 clinical urine samples concentrated by different procedures. Our results showed that urine concentration by filtration is the easiest and quickest procedure allowing furt
However, there were significant correlations between the enthalpy involved and each of VAG maximum viscosity, breakdown, viscosity at 50 Β°C and set back (r = 0.53, P < 0.05; r = 0.49, P < 0.05; r = 0.62, P < 0.05; r = 0.65, P < 0.01, respectively). For RVA data, correlations were found only between