Results 241 to 250 of about 946,755 (288)

PRODUCTION OF GREEN ALGAE IN DEUTERIUM OXIDE

Canadian Journal of Microbiology, 1966
The two species of green algae Scenedesmus obliquus and Chorella vulgaris were successfully adapted and grown in 99.7% deuterium oxide in 15-liter culture units. These units average 50 to 60 g of dry cells every 10 to 12 days. The deuterium oxide used in the media was recycled after purification to maintain usage at practical values.
A J, Williams, A T, Morse, R S, Stuart
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Nucleic Acids in Deuterium Oxide Solution

Nature, 1961
Observations on the infrared spectra of certain nucleosides led to the conclusion that the specific pairings of cytosineguanine and adenine-uracil generally postulated in nucleic acid structures involve proton transfer from uracil to guanine to adenine or cytosine, and that such pairings cause stong absorptions in the viciniiy of 1710 cm/sup -1 ...
Y. KYOGOKU, M. TSUBOI, T. SHIMANOUCHI, I. WATANABE   +3 more
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Deuterium oxide effect on spermatogenesis in the mouse

Experimental Cell Research, 1968
Drinking water containing 30 per cent D2O by volume was given to young adult S and C57 black mice. Quantitative histological study of the testes at weekly intervals indicated a progressive decline in number of spermatogonia to about 60 per cent of control by the end of the 7-week experimental period.
Oakberg, E F, Hughes, A M
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In Vitro Actomyosin Motility in Deuterium Oxide

2003
Actin filament velocities in an in vitro motility assay system were measured both in heavy water (deuterium oxide, D2O) and water (H2O) to examine the effect of D2O on the actomyosin interaction. The dependence of the sliding velocity on pD of the D2O assay solution showed a broad pD optimum of around pD 8.5 which resembled the broad pH optimum (pH 8.5)
Shigeru, Chaen, Naoto, Yamamoto, Ibuki, Shirakawa, Haruo, Sugi   +3 more
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ACID‐BASE STUDIES WITH DEUTERIUM OXIDE*

Annals of the New York Academy of Sciences, 1960
A detailed treatment is given of recent developments in the field of acid-base studies, with emphasis on the particular contributions of studies in D/ sub 2/0 to problems of acidbase catalysis. Discussion is mostly restricted to acid catalysis and is given in terms of the bimolecular mechanisms. Rate laws are given in concentration units.
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GROWTH OF AZOTOBACTER IN DEUTERIUM OXIDE

Journal of Bacteriology, 1962
Johnstone , D. B. (University of Vermont, Burlington). Growth of Azotobacter in deuterium oxide. J. Bacteriol. 83: 867–870. 1962.—To the small list of bacteria that are reported to have been cultured in fully deuterated media can be added Azotobacter agilis
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Gelatin gels in deuterium oxide

Food Hydrocolloids, 2003
Abstract Gelatin gels formed in D2O have greater rigidity than gels of equal concentration formed in H2O. In D2O the junction zones (regions of collagen triple helix structure) were smaller (i.e. involved fewer amino acid residues) than in H2O. The contribution per amino acid residue to the free energy of formation of junction zones was −0.51 kJ/mol ...
David Oakenfull, Alan Scott
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THE EFFECTS OF DEUTERIUM OXIDE ON CERTAIN MICROORGANISMS*

Annals of the New York Academy of Sciences, 1960
The growth of several strains of E. coli and B. subtilis was inhibited by the presence of D/sub 2/O; the degree of inhibition exhibited by each strain was specific. The addition of 0.5% NaC1 to the D/sub 2/O media decreased the inhibition of growth. A deuterium-resistant mutant was obtained from one strain of E. coll.
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Hydrophobic interaction in deuterium oxide

Australian Journal of Chemistry, 1975
Methods previously used to study hydrophobic interaction in ordinary water have been used to measure the free energy of hydrophobic interaction between hydrocarbon chains in deuterium oxide at 25°:     (1) Conductance measurements on micellar solutions of a series of hexadecyltrimethylammonium carboxylates give the effect of ...
DG Oakenfull, DE Fenwick
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Reactions of 3,3-dimethylbut-1-ene with deuterium oxide or deuterium over oxide catalysts

Journal of Catalysis, 1972
Exchange reactions of 3,3-dimethylbut-1-ene (I) with D2O have been studied over four X-type zeolites, silica-alumina and magnesium oxide, and with D2 over some of the catalysts. The isomerization of I, in the presence of D2O or D2, to form 2,3-dimethylbut-1-ene (II) and 2,3-dimethylbut-2-ene (III) was also followed.
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