Results 61 to 70 of about 28,933 (187)

Dust in the wind: Crystalline silicates, corundum and periclase in PG 2112+059

open access: yes, 2007
We have determined the mineralogical composition of dust in the Broad Absorption Line (BAL) quasar PG 2112+059 using mid-infrared spectroscopy obtained with the Spitzer Space Telescope.
D. C. Hines   +8 more
core   +1 more source

Low toxic corrosion inhibitors for aluminum in fresh water [PDF]

open access: yes
Combinations of chemical compounds that reportedly reduce the corrosion of aluminum in fresh water were evaluated. These included combinations of borates, nitrates, nitrites, phosphates, silicates, and mercaptobenzothiazole.
Humphries, T. S.
core   +1 more source

Improved CMAS corrosion resistance of rare earth niobates by high-entropy and composite design

open access: yesJournal of Materials Research and Technology
This study reports the preparation of two single-phase high-entropy rare-earth niobates (RE1/5Ho1/5Er1/5Y1/5Yb1/5)3NbO7, (RE = Ce, Lu), and two composite-phase high-entropy rare-earth niobates (RE1/5Ho1/5Er1/5Y1/5Yb1/5)3NbO7:(RE1/5Ho1/5Er1/5Y1/5Yb1/5 ...
Liujia Tian   +6 more
doaj   +1 more source

Effect of Additives and Fuel Blending on Emissions and Ash-Related Problems from Small-Scale Combustion of Reed Canary Grass

open access: yesAgriculture, 2015
Agricultural producers are interested in using biomass available on farms to substitute fossil fuels for heat production. However, energy crops like reed canary grass contain high nitrogen (N), sulfur (S), potassium (K) and other ash-forming elements ...
Sébastien Fournel   +3 more
doaj   +1 more source

Effect of microstructure of modified diatomite on its adsorption properties

open access: yesХімія, фізика та технологія поверхні, 2017
The effect of microstructural changes caused by chemical modification of diatomite with aluminosilicate nanoparticles on its adsorption properties with respect to fluorine has been elucidated. The surface modification of diatomite with aluminosilicate is
T. Ia. Datsko, V. I. Zelentsov
doaj   +1 more source

Supercritical Fluid Geochemistry in Geothermal Systems

open access: yesGeofluids, 2019
Supercritical fluids exist in the roots of many active high-temperature geothermal systems. Utilization of such supercritical resources may multiply energy production from geothermal systems; yet, their occurrence, formation mechanism, and chemical ...
Matylda Heřmanská   +2 more
doaj   +1 more source

Development of durable “green” concrete exposed to deicing chemicals via synergistic use of locally available recycled materials and multi-scale modifiers [PDF]

open access: yes, 2018
From the economic and social perspectives, the use of waste materials would not be attractive until their costs and quality can satisfy the construction requirements.
Cui, Na, Xie, Ning
core  

Simultaneous aluminum, silicon, and sodium coordination changes in 6 GPa sodium aluminosilicate glasses [PDF]

open access: yes, 2009
We present the first direct observation of high-coordinated Si and Al occurring together in a series of high-pressure sodium aluminosilicate glasses, quenched from melts at 6 GPa.
Asimow, Paul D.   +3 more
core   +1 more source

Differentiation of Planetesimals and the Thermal Consequences of Melt Migration

open access: yes, 2011
We model the heating of a primordial planetesimal by decay of the short-lived radionuclides Al-26 and Fe-60 to determine (i) the timescale on which melting will occur; (ii) the minimum size of a body that will produce silicate melt and differentiate ...
Gaidos, Eric, Moskovitz, Nicholas
core   +1 more source

Concentration of main elements in mineral matter of Polish coking coal and its cleaning products

open access: yesE3S Web of Conferences, 2017
The chemical composition of coal mineral matter, and particularly the content of major elements (Al, Si, Fe, Ca, K, Na, Mg), plays an important role in the processing and use of bituminous coals.
Bytnar Krzysztof, Makowska Dorota
doaj   +1 more source

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