Results 21 to 30 of about 526,182 (348)

Minerals of Fe in the oxidation zone of massive sulfide ore in the South Pechenga structure zone, Kola region: Identification by the Raman spectroscopy [PDF]

Vestnik MGTU, 2017
The paper presents data on the study of iron-bearing minerals formed in the oxidation zone of massive sulfide ores. The minerals are represented by two groups: oxides, i. e. goethite and lepidocrocite, and sulfates, i. e.
Kompanchenko A. A., Voloshin A. V., Sidorov M. Yu   +2 more
doaj   +1 more source

Scaling in a Geothermal Heat Exchanger at Soultz-Sous-Forêts (Upper Rhine Graben, France): A XRD and SEM-EDS Characterization of Sulfide Precipitates

Geosciences, 2021
The Soultz-Sous-Forêts geothermal site (France) operates three deep wells for electricity production. During operation, scales precipitate within the surface installation as (Ba, Sr) sulfate and (Pb, As, Sb) sulfide types.
Béatrice A. Ledésert, Ronan L. Hébert, Justine Mouchot, Clio Bosia, Guillaume Ravier, Olivier Seibel, Éléonore Dalmais, Mariannick Ledésert, Ghislain Trullenque, Xavier Sengelen, Albert Genter   +10 more
doaj   +1 more source

Reduction of sulfate, nitrate and nitrite ions by Desulfovibrio sp. under the influence of ferrum (III) citrate

Біологічні студії, 2020
The influence of ferrum (III) citrate added to the cultivation medium, on the reduction of sulfate, nitrate, and nitrite ions by sulfate-reducing bacteria Desulfovibrio desulfuricans IMV K-6, Desulfovibrio sp. Yav-6, and Desulfovibrio sp.
O. M. Moroz, S. O. Hnatush, G. V. Yavorska   +2 more
doaj   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source

Heterogeneous Hydroxyl Radical Oxidation of Isoprene-Epoxydiol-Derived Methyltetrol Sulfates: Plausible Formation Mechanisms of Previously Unexplained Organosulfates in Ambient Fine Aerosols

Environmental Science and Technology Letters, 2020
Methyltetrol sulfates are unique tracers for secondary organic aerosol (SOA) formed from acid-driven multiphase chemistry of isoprene-derived epoxydiols.
Yuzhi Chen, Yue Zhang, A. Lambe, Rongshuan Xu, Ziying Lei, Nicole E. Olson, Zhen-Fa Zhang, Tessa Szalkowski, T. Cui, W. Vizuete, A. Gold, B. Turpin, A. Ault, M. Chan, J. Surratt   +14 more
semanticscholar   +1 more source

THE NATURAL AND ANTHROPOGENIC FACTORS’ IMPACT ON WATER QUALITY IN COOLING POOLS (THE LAKE GUSINOYE AS A STUDY CASE)

Водное хозяйство России: проблемы, технологии, управление, 2020
The materials of the expedition of the Faculty of Geography of Moscow State University on Lake Gusinoye in August 2019 made it possible to assess the hydrological structure of the lake, the distribution of the flow of the main tributaries and wastewater ...
Anna N. Lukyanova, Olga N. Lukyanova, Ludmila Y. Yefimova, Vasiliy A. Yefimov   +3 more
doaj   +1 more source

Cholesterol and oxysterol sulfates: Pathophysiological roles and analytical challenges

British Journal of Pharmacology, 2020
Cholesterol and oxysterol sulfates are important regulators of lipid metabolism, inflammation, cell apoptosis, and cell survival. Among the sulfate‐based lipids, cholesterol sulfate (CS) is the most studied lipid both quantitatively and functionally ...
L. Sanchez, Lorenzo Pontini, M. Marinozzi, L. Sanchez-Aranguren, Ana Reis, Irundika H. K. Dias   +5 more
semanticscholar   +1 more source

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
doaj   +1 more source

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
doaj   +1 more source