Results 11 to 20 of about 608,326 (393)

Influence of Different Alkali Sulfates on the Shrinkage, Hydration, Pore Structure, Fractal Dimension and Microstructure of Low-Heat Portland Cement, Medium-Heat Portland Cement and Ordinary Portland Cement

open access: yesFractal and Fractional, 2021
In cement-based materials, alkalis mainly exist in the form of different alkali sulfates. In this study, the impacts of different alkali sulfates on the shrinkage, hydration, pore structure, fractal dimension and microstructure of low-heat Portland ...
Li Yang   +6 more
semanticscholar   +1 more source

Detection and Quantification of Polychlorinated Biphenyl Sulfates in Human Serum.

open access: yesEnvironmental Science and Technology, 2021
Polychlorinated biphenyls (PCBs) are persistent toxic chemicals with both legacy sources (e.g., Aroclors) and new sources (e.g., unintentional contaminants in some pigments and varnishes).
Duo Zhang   +7 more
semanticscholar   +1 more source

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

open access: yesEnvironmental 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   +14 more
semanticscholar   +1 more source

Diacetamidinium sulfate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2010
In the crystal structure of the title compound, 2C(2)H(7)N(2) (+)·SO(4) (2-), which contains four cations and two anions in the asymmetric unit, the ions are inter-connected by an extensive hydrogen-bonding system whereby two of the O atoms of sulfate ion are hydrogen-bonded to the amidinium H atoms of two cations, leading to the formation of two eight-
Zdeněk Jalový   +1 more
openaire   +3 more sources

Cholesterol and oxysterol sulfates: Pathophysiological roles and analytical challenges

open access: yesBritish 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   +5 more
semanticscholar   +1 more source

Mechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystall

open access: yesEurasian Journal of Physics and Functional Materials, 2021
The mechanism of creation of electron-hole trapping centers in CaSO4 at 15-300 K was investigated by the methods of vacuum-ultraviolet and thermoactivation spectroscopy. It is shown that electron-hole trapping centers are formed upon trap of electrons in
T.N. Nurakhmetov   +7 more
doaj   +1 more source

Intrinsic emission and electron-hole trapping centers in crystals Li2SO4-Cu

open access: yesEurasian Journal of Physics and Functional Materials, 2021
In the present work, the emission and excitation spectra in Li2SO4-Cu crystals have been obtained by the methods of vacuum-ultraviolet and thermoactivation spectroscopy.
T.N. Nurakhmetov   +10 more
doaj   +1 more source

Dose-dependent effect of electron acceptor and donor on dissimilatory sulfate reduction by bacteria Desulfovibrio Piger Vib-7 of human intestine

open access: yesБіологічні 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

Insights into secondary reactions occurring during atmospheric ablation of micrometeoroids [PDF]

open access: yes, 2016
Ablation of micrometeoroids during atmospheric entry yields volatile gases such as water, carbon dioxide, and sulfur dioxide, capable of altering atmospheric chemistry and hence the climate and habitability of the planetary surface.
Court, RW, Tan, J
core   +1 more source

Geochemical approach in assessing the technogenic impact on soils

open access: yesЗаписки Горного института, 2020
The soil assessment was carried out in the technogenically-affected area of Irkutsk Oblast with the geochemical approach as a key geoecological method using physical and chemical techniques of analysis and ecodiagnostics.
Galina I. Sarapulova
doaj   +1 more source

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