C chemical shift anisotropies for carbonate ions in cement minerals and the use of 13 C, 27 Al and 29 Si MAS NMR in studies of Portland cement including limestone additions[J] . Tine F. Sevelsted,Duncan Herfort,J?rgen Skibsted.Cement and Concrete Research . 2013...
I have been set this question: MHSO4 (where M stands for either Na or K) is a crystalline solid that dissolves in water giving a solution containing M+, HSO4-, H+and SO42-ions. Describe a chemical test (apart from indicators) by which you could demonstrate that an aqueous solution of...
Sequential extraction techniques were employed to analyze the distribution of PTEs such as As, Cd, Co, Cu, Mn, Pb, Ni, Sn, and Zn among different fractions: exchangeable (F1), bound to carbonate phase (F2), bound to iron and manganese oxides (F3), bound to organic matter (F4), and ...
(1963): Potassium-rubidium ratios and polymorphism in illites and microclines from the clay size fraction of proterozoic carbonate rocks. GCA 27, 1097–1112. [K, Rb]. Google Scholar Rhodes, J. M. (1969): On the chemistry of potassium feldspars in granitic rocks. Chern. Geol. 4, 373...
To an ice-cooled solution of L-cystine (5.00 g, 20.8 mmol, 1.00 eq) in deionized water (100 mL) was added sodium carbonate (8.80 g, 83.2 mmol, 4.00 eq) followed by the dropwise addition of a solution of di-tert-butyl dicarbonate (13.6 g, 62.4 mmol, 3.00 eq) in 1,4-dioxane (50...
The doubly charged negative ion of the RNA fragment (m/z 661.1) was used as the precursor for CID. g Whole-mass analysis of intact mt-tRNACys. A series of multiply charged negative ions with charge values are shown in the mass spectrum. The deconvoluted molecular mass is shown in the ...
“The nerve agent VX can be chemically detoxified via two major classes of selective chemical reactions under ambient conditions-nucleophilic substitution with exclusive P−S bond cleavage (e.g., using aqueous peroxycarbonate) and hydrolysis initiated by oxidation at sulfur (e.g., using aqueous ...
select article Chemical looping gasification coupled with steam reforming of biomass using NiFe2O4: Kinetic analysis of DAEM-TI, thermodynamic simulation of OC redox, and a loop test Research articleAbstract only Chemical looping gasification coupled with steam reforming of biomass using NiFe2O4: Kinetic...
Calcium carbonate can be separately calcined to yield a pure CO2 stream for its subsequent sequestration, and the calcium-based sorbent can be regenerated and recycled back. The nickel-based oxygen carrier can be regenerated with air to provide heat for the reforming reaction as well as the ...
3. (a) Validation of the LSWPF simulator evolution ions with PHREEQC geochemical module for low salinity waterflooding (b) Validation of the LSWPF simulator evolution ions with PHREEQC for high salinity waterflooding (c) LSWPF simulator validated with Kozaki (2012) secondary LSWPF coreflood test....