Deuterium Oxide
Mostrando 1-12 de 62 artigos, teses e dissertações.
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1. Obese elderly women exhibit low postural stability: a novel three-dimensional evaluation system
OBJECTIVE: The aim of this study was to evaluate the multisegmental static postural balance of active eutrophic and obese elderly women using a three-dimensional system under different sensory conditions. METHODS: A cross-sectional study was conducted on 31 elderly women (16 eutrophic and 15 obese) aged 65 to 75 years. The following anthropometric measuremen
Clinics. Publicado em: 2012
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2. Body composition measures of obese adolescents by the deuterium oxide dilution method and by bioelectrical impedance
The objectives of the present study were to describe and compare the body composition variables determined by bioelectrical impedance (BIA) and the deuterium dilution method (DDM), to identify possible correlations and agreement between the two methods, and to construct a linear regression model including anthropometric measures. Obese adolescents were evalu
Brazilian Journal of Medical and Biological Research. Publicado em: 2011-11
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3. Protein metabolism, body chemical composition, carcass traits and meat quality of Nellore steers (Bos indicus) as a function of their residual feed intake / Metabolismo protéico, composição corporal, características de carcaça e qualidade de carne de novilhos Nelore (Bos indicus) em função de seu consumo alimentar residual
Residual feed intake (RFI) is a feed efficiency trait that is independent of growth rate and mature weight. Genetic improvement in RFI may reduce the costs of feeding cattle, however a better understanding of biological processes underlying variation in RFI is necessary. Moreover, associations between RFI and carcass quality have been poorly investigated in
Publicado em: 2009
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4. Avaliação do consumo alimentar e comparação de métodos de avaliação corporal de nutrizes
Este trabalho foi desenvolvido com o objetivo de avaliar o consumo alimentar e comparar métodos para a avaliação da composição corporal de nutrizes. Métodos: Foram realizados dois estudos. No 1 participaram 110 mães e no 2 estudo 23 mães. As mães deveriam ser maiores de 19 anos, não serem portadoras de doença crônica ou condição de doença que
Publicado em: 2008
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5. Nível de atividade física e composição corporal através de hidrometria, bioimpedância e antropometria em adolescentes fisicamente ativos do Distrito Federal
Objetivo: A relação entre a prática regular da atividade física (AF) e a composição corporal em adolescentes ainda não foi claramente estabelecida. Parte do problema reside na falta de validade das técnicas e equações utilizadas para predizer a composição corporal em diferentes grupos étnicos, principalmente durante a adolescência devido a muda
Publicado em: 2006
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6. Pressure-assisted cold denaturation of hen egg white lysozyme: the influence of co-solvents probed by hydrogen exchange nuclear magnetic resonance
COSY proton nuclear magnetic resonance was used to measure the exchange rates of amide protons of hen egg white lysozyme (HEWL) in the pressure-assisted cold-denatured state and in the heat-denatured state. After dissolving lysozyme in deuterium oxide buffer, labile protons exchange for deuterons in such a way that exposed protons are substituted rapidly, wh
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-08
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7. Lipid hydroperoxides as a biological source of singlet oxygen: studies using isotopic labelling, mass spectrometry and luminescence / Hidroperóxidos de lipídios como fonte biológica de oxigênio singlete: estudos com marcação isotópica, espectrometria de massas e luminescência
Evidences point to the involvement of lipid peroxidation in several diseases. Lipid hydroperoxides (LOOH) are the primary products of lipid peroxidation and their decomposition generates more reactive and toxic compounds, such as peroxyl radicals. These radicals play an important role in the propagation of lipid peroxidation and may also generate singlet mol
Publicado em: 2005
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8. Deuterium Oxide as a Density Label of Peroxidases in Germinating Barley Embryos 1
Density labeling with deuterium oxide, gel electrophoresis, and isopycnic equilibrium sedimentation were used to study the appearance and disappearance of individual peroxidases in the embryos of germinating barley. No detectable label was incorporated into those peroxidases which are present in the embryo of the dry seed and disappear during germination. De
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9. GROWTH OF AZOTOBACTER IN DEUTERIUM OXIDE
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 and A. vinelandii. Moreover, these bacteria, although growing in a deuterium oxide medium with deute
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10. THE MEASUREMENT OF TOTAL BODY WATER IN THE HUMAN SUBJECT BY DEUTERIUM OXIDE DILUTION: WITH A CONSIDERATION OF THE DYNAMICS OF DEUTERIUM DISTRIBUTION 1
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11. The Effect of Growth in 99.8 Deuterium Oxide on the Ultrastructure of Winter Rye 1
A preliminary report dealing with the ultrastructural effects of culture in a 99.8% D2O (deuterium oxide) environment on winter rye (Secale cereale L. cv. Winter) is presented. In general, the cells of D2O-cultured seedlings appeared similar to the cells of H2O-cultured seedlings. However, differences were found in chloroplast and dictyosome morphology, and
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12. Deuterium isotope effect on the intramolecular electron transfer in Pseudomonas aeruginosa azurin
Intramolecular electron transfer in azurin in water and deuterium oxide has been studied over a broad temperature range. The kinetic deuterium isotope effect, kH/kD, is smaller than unity (0.7 at 298 K), primarily caused by the different activation entropies in water (−56.5 J K−1 mol−1) and in deuterium oxide (−35.7 J K−1 mol−1). This diff
The National Academy of Sciences.