Results 11 to 20 of about 176,458 (336)

Mechanisms formation of electron-hole trap centers in LiKSO4 crystall

Eurasian Journal of Physics and Functional Materials, 2021
The mechanisms of creation of electron-hole trapping centers in LiKSO4 have been investigated by the methods of vacuum and thermal activation spectroscopy.
T.N. Nurakhmetov, Zh.M. Salikhodzha, A.M. Zhunusbekov, A.Zh. Kainarbay, D.H. Daurenbekov, T.T. Alibay, B.M. Sadykova, K.B. Zhangylyssov, B.N. Yussupbekova, D.A. Tolekov   +9 more
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Energy transfer of intrinsic electronic excitation to impurities in the CaSO4 − Mn crystal

Eurasian Journal of Physics and Functional Materials, 2021
The nature of the impurity emission center and the energy transfer mechanisms from intrinsic electronic excitations to the Mn2+ impurity centers in the CaSO4 − Mn crystal have been investigated.
T.N. Nurakhmetov, Zh.M. Salikhodzha, K.B. Zhangylyssov, A.M. Zhunusbekov, A.Zh. Kainarbay, D.H. Daurenbekov, Zh. Azmagambetova, B.M. Sadykova, B.N. Yussupbekova, T.T. Alibay, D.A. Tolekov, N. Tulebayeva   +11 more
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Distribution and chemical composition of halotrichite in geothermal fields of Kamchatka

Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2023
Halotrichite has been identified in geothermal fields of the Kambalny-Pauzhetka-Koshelev region, the Bolshoi Semiachik complex, and the Mutnovsky volcano (Kamchatka, Russia).
R.M. Sheveleva, M.A. Nazarova, A.A. Nuzhdaev, P.S. Zhegunov, E.S. Zhitova   +4 more
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Dose-dependent effect of electron acceptor and donor on dissimilatory sulfate reduction by bacteria Desulfovibrio Piger Vib-7 of human intestine

Біологічні студії, 2014
Growth of Desulfovibrio piger Vib-7 bacteria of human intestine under the influence of the electron acceptor and donor in different concentrations and the parameters of dissimilatory sulfate reduction have been studied.
I. V. Kushkevych
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Melaminium sulfate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2008
In the title compound, C(3)H(8)N(6) (2+)·SO(4) (2-), the melaminium cations and sulfate anions are inter-connected by N-H⋯N and N-H⋯O hydrogen bonds, forming a layer in the (101) plane. The layers are connected through multiple hydrogen bonds and π-π stacking inter-actions (centroid-centroid distance of about 3.4 Å).
Hai-Peng Jing, De-Liang Cui, Bao-Yong Zhu   +2 more
openaire   +3 more sources

Spectral and stratigraphic mapping of hydrated sulfate and phyllosilicate-bearing deposits in northern Sinus Meridiani, Mars [PDF]

, 2010
We present detailed stratigraphic and spectral analyses that focus on a region in northern Sinus Meridiani located between 1°N to 5°N latitude and 3°W to 1°E longitude.
Andrews-Hanna, J. C., Arvidson, R. E., Bishop, J. L., Des Marais, D. J., Griffes, J. L., Morris, R. V., Murchie, S. L., Poulet, F., Seelos, F. P., Wiseman, Sandra M.   +9 more
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Optimizing the Sulfates Content of Cement Using Neural Networks and Uncertainty Analysis

ChemEngineering, 2023
This study aims to approximate the optimum sulfate content of cement, applying maximization of compressive strength as a criterion for cement produced in industrial mills.
Dimitris C. Tsamatsoulis, Christos A. Korologos, Dimitris V. Tsiftsoglou   +2 more
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Structurally-related (−)-epicatechin metabolites in humans: assessment using de novo chemically synthesized authentic standards [PDF]

, 2012
Accumulating data suggest that diets rich in flavanols and procyanidins are beneficial for human health. In this context, there has been a great interest in elucidating the systemic levels and metabolic profiles at which these compounds occur in humans ...
Arts, Auger, Baba, Baba, Balzer, Bors, Carl L. Keen, Donovan, Donovan, Flammer, Grassi, Gunter K. Kuhnle, Hagen Schroeter, Harada, Heiss, Heiss, Heiss, Heiss, Hollenberg, Holt, Javier I. Ottaviani, Koster, Kuhnle, Loke, Mannisto, McCullough, Mink, Mullen, Mursu, Natsume, Neveu, Okushio, Ottaviani, Piskula, Robbins, Roura, Schroeter, Schroeter, Spencer, Stalmach, Taubert, Tony Y. Momma, Unno, Vaidyanathan, Weitering, Zimmermann   +45 more
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Novel High-Temperature Modification of Belomarinaite KNaSO₄: Crystal Structure and Thermal Order–Disorder Phase Transitions

Crystals, 2023
Belomarinaite KNaSO4 (space group P3m1, a = 5.6072(3), c = 7.1781(4) Å and Z = 2) has been studied by high-temperature single crystal X-ray diffraction. The K and Na atoms are disordered, and M1(1c) and M2(1b) sites merge into an M1(2d)(K50%/Na50%) site ...
Andrey Shablinskii, Rimma Bubnova, Olga Shorets, Maria Krzhizhanovskaya, Sergey Volkov, Stanislav Filatov   +5 more
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Promising method of ion exchange separation of anions before reverse osmosis [PDF]

Archives of Environmental Protection, 2021
A method to improve the quality of purifi ed water, reduce the cost of reagents for the regeneration of resin and create low-waste processes have been developed. This paper presents the results of ion exchange separation of sulfates and nitrates using AV-
Inna Trus, Mukola Gomelya, Viktoria Vorobyova, Margarita Skіba   +3 more
doaj   +1 more source