A process for catalytically hydroconverting coal to produce coal liquids is effected by forming a mixture of an oil soluble metal compound, a hydrogen donor solvent and coal, converting the compound to a catalyst within said mixture and reacting the mixture with hydrogen. The recovered hydrogen don...
A process for catalytically hydroconverting coal to produce coal liquids is effected by forming a mixture of an oil soluble metal compound, a hydrogen donor solvent and coal, converting the compound to a catalyst within said mixture and reacting the mixture with hydrogen. The recovered hydrogen ...
The pH scale is used to specify the acidity or basicity of an aqueous solution. By definition, pH = – log₁₀(aH+) = log₁₀(1/aH+), where aH+ is the hydrogen ion activity in a solution. For example, pH of lemon juice is 2.2 and pH of distilled water is 7. f-number...
FeII/α-ketoglutarate (FeII/αKG)-dependent enzymes offer a promising biocatalytic platform for halogenation chemistry owing to their ability to functionalize unactivated C–H bonds. However, relatively few radical halogenases have been identified to date, limiting their synthetic utility. Here, we ...
Explain how to use your calculator to find the concentration of hydrogen ion in a solution that has a pH of 7.6. The measurements of Hubble's constant shows it to be 68.9 kms raised to the -1 power, Mpc raised to the -1 power. How to calculate the age of the universe with the ans...
The recombinant SDRs were purified and assessed for their ability to dehydrogenate the Cα position of GGGE. Only two recombinant SDRs (SDR3 and SDR5; Figure S2a), encoded by the genes GAM05523 and GAM05547, respectively, exhibited dehydro- genase activity in the presence of nicotinamide...
Converting to pKa Ka values can be very large or very small. For example, the Ka value for hydrochloric acid (HCl) is around 107, while the Ka value for ascorbic acid (vitamin C) is 1.6 X 10-12. Working with such numbers is inconvenient, so to makes things easier, chemists have defi...
structure of cardiovascular MOB had been NH4+-N, dissolved air (DO), heat (T, p ≤ 0.001), pH (p ≤ 0.05), methane (CH4) and carbon-dioxide (CO2). From 2016-2022, 50 successive patients had been divided in to groups after the implementation of the center (APUV, n =...
(Figure 2D). This conserved water molecule alsohydrogen bondsto the backbone amide of Leu498, forming a unique interaction between the cyano group and the DLG motif (canonically DFG motifs in other kinases) in the Mg2+binding loop of SRPK1. In addition, Asp497 of the DLG motif also ...
6) hydrogen reduction 加氢还原 1. This paper introduces principle of leaching gold with acidic thiourea and main recovery methods:activated carbon adsorption method,ion exchange resin method, solvent extraction method, hydrogen reduction method,replacement precipitation method. 介绍了酸性硫脲浸金的原理...