Results 281 to 290 of about 4,078,410 (323)
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The hydrogen ion and pulmonary vasomotricity
American Heart Journal, 1969Abstract A short review has been presented of the present state of knowledge regarding the relationship of the dual stimulation of the hydrogen ion and hypoxia on pulmonary artery vasomotricity. These interacting stimuli are probably the major determinants of pulmonary hypertension in chronic obstructive lung disease.
Réjane M. Harvey +2 more
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Hydrogen ions in hydrophobic membranes
Biochimica et Biophysica Acta (BBA) - Biomembranes, 1968Filters containing fixed negative charges were saturated with hydrophobic solvent and exposed to solutions containing K+, Na+, or tetraethylammonium+ at various pH's. Between pH 2 and pH 7, H+ is comparable to K+ and tetraethyl-ammonium+ in its ability to compete for fixed negative sites in the membrane.
Asher Ilani, Dan Tzivoni
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The American Journal of Medicine, 1958
Abstract It is agreed that acids and bases may be defined in terms of transfers of hydrogen ion. In the body, however, since hydrogen ion changes are almost completely buffered, they cannot be measured adequately as such but only in terms of the accompanying reciprocal change in buffer anions.
Earl S. Barker, J. Russell Elkinton
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Abstract It is agreed that acids and bases may be defined in terms of transfers of hydrogen ion. In the body, however, since hydrogen ion changes are almost completely buffered, they cannot be measured adequately as such but only in terms of the accompanying reciprocal change in buffer anions.
Earl S. Barker, J. Russell Elkinton
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HYDROGEN ION CONCENTRATION OF THE AQUEOUS
Archives of Ophthalmology, 1946THE value of the glass electrode for determination of the hydrogen ion concentration in the vitreous 1 led to its use for similar investigations on the aqueous humor. The studies were indicated in view of the variations in the physiologic values cited in the literature.
Ludwig von Sallmann, Jeanette Di Grandi
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Journal of Astrophysics and Astronomy, 1996
The negative ion of hydrogen continues to be important in atomic physics and astrophysics. Correlations between the two electrons are strong already in the ground state, the only bound state in this three-body system. This state attracted early interest, especially for the description of stellar atmospheres by Chandrasekhar and others.
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The negative ion of hydrogen continues to be important in atomic physics and astrophysics. Correlations between the two electrons are strong already in the ground state, the only bound state in this three-body system. This state attracted early interest, especially for the description of stellar atmospheres by Chandrasekhar and others.
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Magnetism of Hydrogen and Lithium Ions [PDF]
Nature, 1951 IN the free state, the hydrogen ion, H+, can clearly exhibit no magnetism, and the lithium ion, Li+, will possess a small diamagnetism. It has often been pointed out that, in solids or in solutions, these ions should not behave in this fashion, but Would most likely give rise to a paramagnetic effect in addition.
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Mathematical Proceedings of the Cambridge Philosophical Society, 1931
The advent of quantum mechanics has provided a means of treating the interaction of atoms and the formation of molecules and has had very many successes in this field. In particular the phenomenon of the saturation of valence forces appears as a natural consequence of the theory. Nevertheless there are very many difficulties still to be overcome.
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The advent of quantum mechanics has provided a means of treating the interaction of atoms and the formation of molecules and has had very many successes in this field. In particular the phenomenon of the saturation of valence forces appears as a natural consequence of the theory. Nevertheless there are very many difficulties still to be overcome.
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An Overview of Hydrogen Ion Regulation
Archives of Internal Medicine, 1982• The extracellular hydrogen ion concentration is maintained almost constant through an interacting series of processes. These include the activities of the chemical buffers, the regulation of the carbon dioxide level by the pulmonary system, and the excretion of acid or alkali by the kidney.
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Surface production of negative hydrogen ions by hydrogen and cesium ion bombardment
AIP Conference Proceedings, 1987Metal targets have been bombarded with cesium and hydrogen ions in the energy range 100 to 1000 eV. Angular and energy distributions and the yield of the H− ions have been measured as function of energy and ion mix. Synergistic effects due to simultaneous hydrogen and cesium ion bombardment produce a higher H− yield than the sum of the individual ...
J. L. Lopes +4 more
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Hydrogen Ion Incorporation in Crystals
Science, 1963The protons in crystal structures can be related to the oxygen lattice through several spatial arrangements. In orthosilicates (for example, hydrogarnets), so-called tetrahedral hydroxyls have been demonstrated by indirect methods. Similar methods, when applied to kehoeite and viséite, lead to the conclusion that (H 3
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