Výsledky vyhledávání - "Horace S. Isbell"

Tritium-Labeled Compounds V. Radioassay of Both Carbon-14 and Tritium in Films, With a Proportional Counter

Autor: Harriet L. Frush, Horace S. Isbell, N.B. Holt

Publikováno v: Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry

A convenient procedure is described for the radioassay of both carbon-14 and tritium in water-soluble, nonvolatile compounds by means of a windowless, gas-flow, proportional counter. The materials are counted in uniform films of sodium O-(carboxymeth

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c6d597700aa00f3902d76b1ff6fe17c
https://pubmed.ncbi.nlm.nih.gov/32196177

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Conformations of the Pyranoid Sugars. II. Infrared Absorption Spectra of Some Aldopyranosides

Autor: Horace S. Isbell, R. Stuart Tipson

Publikováno v: Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry

The conformations of twenty-four aldopyranosides have been studied by analysis of their infrared absorption spectra. The most stable conformations of twelve of the glycosides had previously been assigned by Reeves from a study of their instability fa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86bce0efc0c072c088bc8ab39b943dd1
https://pubmed.ncbi.nlm.nih.gov/32196191

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Deuterium Isotope Effects in

Autor: Clarence W.R. Wade, Horace S. Isbell

Publikováno v: Journal of research of the National Bureau of Standards. Section A, Physics and chemistry. (2)

Rates of mutarotation, catalytic coefficients, and isotope effects are reported for the mutarotations of α-d-xylose, α-d-glucose, and β-d-fructose in H2O and in D2O at 20 °C. The isotope effects (k H /k D ) for the mutarotation of β-d-fructose (

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f25eeda760863ce00d3717c5d3efe74
https://pubmed.ncbi.nlm.nih.gov/31824039

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Tritium-Labeled Compounds IX. Determination of Isotope Effects in Reactions Yielding Water

Autor: Horace S, Isbell, Lorna T, Sniegoski

Publikováno v: Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry

A convenient method is presented for estimating isotope effects in reactions which yield water-t. The water-t is separated by freeze-drying, and k*/k is calculated from the extent of the reaction and the ratio of the radioactivity of the water-t to t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::d52f3e38d1bd4afeab7ed7b326cb47ff
https://pubmed.ncbi.nlm.nih.gov/31580600

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Tritium-Labeled Compounds II. General-Purpose Apparatus, and Procedures for the Preparation, Analysis, and Use of Tritium Oxide and Tritium-Labeled Lithium Borohydride

Autor: J.D. Moyer, Horace S. Isbell

Publikováno v: Journal of Research of the National Bureau of Standards. Section A, Physics and Chemistry

A general-purpose manifold is described, which is useful for numerous procedures involving tritium gas and tritium-labeled materials. Methods are given in detail for (a) converting tritium gas to tritium oxide, (b) preparing tritium-labeled lithium b

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff39e7a68aea0695951358a386149b9c
https://pubmed.ncbi.nlm.nih.gov/31216150

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