Results 221 to 230 of about 11,831 (256)

Isotopic Composition of Potassium

Nature, 1960
RECENT measurements1–6 of the natural isotopic composition of potassium have yielded values for the potassium-39/potassium-41 ratio ranging from 13.48 ± 0.07 (Nier) to 13.96 ± 0.05 (Omura and Morito). These results are not inconsistent with the presence of variations of 1 or 2 per cent in the potassium-39/potassium-41 ratio for different samples ...
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Experiments With Potassium Isotopes

2005
Experiments on cooling and trapping of potassium are strongly motivated by the occurrence of three isotopes: K, K, K with a relative abundance of 93.26%, 0.012% and 6.73%, respectively. K and K are bosons while K is a fermion, therefore potassium is a good candidate to study a degenerate dilute Fermi gas and bosons-fermions mixtures.
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Isotope Effect in Potassium Dihydrogen Phosphate

Nature, 1939
WHEN the hydrogen in potassium dihydrogen phosphate (KH2PO4) is replaced by deuterium by repeated crystallization from warm 99·6 per cent heavy water (D2O), the potassium phosphate separates in a different crystal structure. It can with some difficulty also be made to crystallize in the tetragonal form described by West1, by adding a nucleus of KH2PO4 ...
A. R. UBBELOHDE, I. WOODWARD
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Potassium isotopic composition of Australasian tektites

Meteoritics & Planetary Science, 2004
Abstract— We have analyzed the potassium isotopic composition of four tektites from the Australasian strewn field, spanning a wide diversity of thermal histories, inferred from textures and volatile element contents. Our results indicate no isotopic differences between tektites and terrestrial crustal rocks, placing stringent limits of ≤2% loss of ...
Humayun, Munir, Köberl, Christian
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The isotopes of lithium, sodium, and potassium

Journal of the Franklin Institute, 1931
Abstract Part I. The relative abundance of the isotopes of lithium. Magnetic analysis of the positive rays of lithium from a heated spodumene source shows no change with temperature in the relative abundance of Li7 and Li6. This is in agreement with Aston and Morand but at variance with the results of G. P.
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ChemInform Abstract: ENRICHMENT OF POTASSIUM ISOTOPES WITH MACROCYCLIC POLYETHER POTASSIUM COMPLEXES

Chemischer Informationsdienst, 1983
AbstractEine Anreicherung von K‐Isotopen wird mit Hilfe der chemischen Austauschreaktion A erreicht.
B. SCHMIDHALTER, E. SCHUMACHER
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Isotopic Separation Factor for the System Potassium Amalgam—Aqueous Potassium Hydroxide

The Journal of Chemical Physics, 1961
The isotopic fractionation of potassium between potassium amalgam and aqueous potassium hydroxide was measured at room temperature. The single-stage separation factor was 1.006±0.002 (95% C. I.).
H. H. Garretson, J. S. Drury
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Efficiency of the Electrolytic Separation of Potassium Isotopes

The Journal of Chemical Physics, 1946
The electrolytic separation coefficient, α, has been determined for the potassium isotope separation in the electrolysis of aqueous solutions of potassium chloride at a flowing mercury cathode. Suspension of purified potassium chloride crystals in a liquid mixture of bromoform, n-pentanol, and n-hexanol served as the analytical procedure in determining
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Chemistry, Radiochemistry and Applications of Potassium Isotopes

1995
Potassium (K) is a principal cation in the intracellular fluid and an important constituent of the extracellular fluid. It influences a number of physiological processes; specifically muscle activity (ie. cardiac muscle) by affecting the cellular resting potential and the cell excitability (1,2).
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Potassium Isotope Cosmochemistry

2021
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