Results 211 to 220 of about 569,388 (236)

XPS study of some calcium compounds

Journal of Materials Processing Technology, 1995
Abstract X-Ray Photoelectron Spectroscopy (XPS) photoemission lines of some calcium compounds have been measured. The fine structure and position of the Ca 2 p 3 2 line is discussed. The Wagner diagram of the oxygen KLL transitions is presented. The surface composition of some compounds is calculated.
D. Muster, B. Demri
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Calcium Reduction of Zirconium Oxide Compounds

Inorganic Materials, 2020
We have determined the adiabatic temperature of the calcium reduction of ZrO2 and CaZrO3 (1525 and 1040 K, respectively) and the reaction onset temperature. In a mixture of reagents under an argon atmosphere in a reactor, it is about 1123 K and is determined by the calcium melting onset. If calcium particles with CaCl2 film on their surface are used as
M. V. Kryzhanov, V. M. Orlov
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Calcium forms in leaves of muskmelon plants grown with different calcium compounds [PDF]

Journal of Plant Nutrition, 1998
Abstract The time course trend of the various calcium (Ca) forms (soluble, bound, inorganic insoluble, and organic insoluble) was studied throughout the growing period in mature and young leaves of Cucumis melo L. cv. Revigal plants cultivated on rockwool under unfavorable conditions for Ca uptake. The following anions accompanying Ca were tested: NO3 ‐
Antonio L. Alarcón, Eulogio Molina, Félix Romojaro, Ramón Madrid   +3 more
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The thermodynamic properties of calcium intermetallic compounds

Journal of Alloys and Compounds, 1995
The thermodynamic properties of calcium alloys have been measured by emf (an original pin-point method) and calorimetry in recent years. A review of experimental results obtained for 15 binary (Ca,M) systems is presented (with M  Ni, Pd, Pt, Cu, Ag, Au, Mg, Al, Ga, Si, Ge, Sn, Pb, Sb, Bi), and numerical optimization is performed for some of them ...
J. Hertz, M. Notin, J. Charles, A. Bouhajib, J. Mejbar   +4 more
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Calcium-Deprived Rats Avoid Sweet Compounds

The Journal of Nutrition, 1998
To characterize the link between calcium status and sweet solution intake, rats fed a diet containing 25 mmol Ca2+/kg (Ca-25, low calcium) or 150 mmol Ca2+/kg (Ca-150, control) were given 48-h two-bottle tests with a choice between water and various concentrations of a nutrient (sucrose, Polycose, ethanol and/or corn oil).
Michael G. Tordoff, Sydrick H. Rabusa
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Deposition of calcium compounds in tomato fruit in relation to calcium transport

Journal of Horticultural Science, 1993
The deposition of calcium in tomato fruit grown at a range of salinities (electrical conductivities between 3 and 17 mS cm“1), with or without IAA-transport inhibitor treatment, was investigated. Calcium (Ca) in the flesh and pulp of tomato fruit was sequentially separated into four fractions: FI soluble in water, FII soluble in 2.5 mol dm“3 NaCl, Fill
L. C. Ho, R. T. Minamide
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The structure of a calcium deficient hexagonal calcium iridium oxide compound

Materials Research Bulletin, 1993
Abstract Ca5−xIr3O12 (with x=0.26(3)) crystallizes in the hexagonal spacegroup P 6 2 m with lattice parameters a =9.4235(5) A and c =3.1945(2) A . This compound has been reported earlier as Ca2IrO4. The structure has been refined by Rietveld analyses of neutron diffraction data recorded at room temperature, Rwp=2.70 ...
F.J.J. Dijksma, Jaap F. Vente, E. Frikkee, D.J.W. IJdo   +3 more
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Mechanical coactivation of hydrargillite and calcium compounds

Inorganic Materials, 2000
The mechanochemical processes in equimolar mixtures of hydrargillite with CaO, Ca(OH)2, and CaCO3 were studied during activation in a vibratory mill. The chemical reactions involved were identified.
A. P. Il’in, V. Yu. Prokof’ev, T. V. Sazanova   +2 more
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Precipitation of Calcium Compounds on Rock Kept in Calcium Hydroxide Solution

Proceedings, 2017
It is important to consider the closure of cracks and pores in rock for radioactive waste disposal and carbon capture and storage to maintain or decrease the permeability of rock. In this study, we investigated the precipitation of calcium compounds on the rock surface in calcium hydroxide solution to consider whether sealing of pores and cracks is ...
Y. Nara, Y. Hamada
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Perfluoroalkyl calcium derivatives: reactions with carbonyl compounds

Journal of the Chemical Society, Chemical Communications, 1975
Perfluoroalkylcalcium derivatives, prepared by the action of perfluoroalkyl iodides on amalgamated calcium in ethers, react with aldehydes and ketones to give the expected alcohols in 20–70% yields.
J. G. Riess, M. Le Blanc, Georges Santini   +2 more
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