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Your search keyword '"Walker PL"' showing total 4 results
Start Over Author "Walker PL" Publication Year Range More than 50 years ago
4 results on '"Walker PL"'

1. Mechanisms of chromosomal aberration production. I. Aberration induction by ultraviolet light.

Author

Bender MA, Griggs HG, and Walker PL

Subjects
Animals, Cell Division radiation effects, Cell Line, Chromatids metabolism, Chromosomes, Clone Cells, Cricetinae, DNA metabolism, DNA Replication radiation effects, DNA, Single-Stranded metabolism, Demecolcine, Mitosis radiation effects, Radiation Effects, Staining and Labeling, Thymidine, Tritium, Chromosome Aberrations, Ultraviolet Rays
Published
1973
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3. Comparison of the radioisotope dilution-coated charcoal method and a microbiological method (L. leichmannii) for measuring vitamin B12 in serum.

Author

Raven JL, Walker PL, and Barkhan P

Subjects
Charcoal, Cobalt Isotopes, Biological Assay, Lactobacillus, Radioisotope Dilution Technique, Vitamin B 12 blood
Abstract

A comparison has been made of the radioisotope dilution-coated charcoal method and a microbiological assay (with L. leichmannii as test organism) for determining the concentration of vitamin B(12) in serum. A satisfactory correlation was found between the results of the two methods. Under appropriate conditions the reproducibility of the radioisotope method compared favourably with that of the microbiological method.

Published
1966
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4. Improved method for measuring vitamin B12 in serum using intrinsic factor, 57CoB12, and coated charcoal.

Author

Raven JL, Robson MB, Walker PL, and Barkhan P

Subjects
Biological Assay, Cyanides, Humans, Hydroxocobalamin analysis, Lactobacillus, Methods, Charcoal, Cobalt Isotopes, Intrinsic Factor, Vitamin B 12 blood
Abstract

An improved and simplified method is described for the measurement of vitamin B(12) in serum using intrinsic factor, (57)CoB(12), and coated charcoal. The extraction of serum in the presence of cyanide and the incorporation of B(12)-deficient serum into the intrinsic factor control has increased the accuracy of the method for both sera and crystalline B(12) solutions. There are interesting differences between the results obtained for some sera by the isotope and L. leichmannii methods and the reasons for these differences are discussed.

Published
1969
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