aAnalogues of polar serine (methanol) and nonpolar alanine (methane) were constructed by replacing the backbone part of each amino acid with a hydrogen and adjusting the adjacent atom type to achieve neutrality. 极性丝氨酸(甲醇)和无极的胺基代丙酸(甲烷)类似物通过替换每氨基酸的中坚零件用氢和调整毗邻...
A new method requiring a knowledge of the heat of dimerization, the equilibrium constant for the reaction, and the interaction constant, is proposed for such polar-nonpolar systems based upon association of the polar component.The most striking feature of the data for mixtures was the large heat...
This makes the polar mobile phase and more polar substances being analyzed elute faster. Methanol is less polar than water, but more polar than organic solvents. Thus, using it in place of water will decrease elution time of nonpolar compounds, which will dissolve in methanol better than in ...
Models are developed for the polar (0001) and nonpolar (1010) surfaces of ZnO in order to consider methanol formation from adsorbed carbon monoxide and hydrogen atoms. The heats of adsorption of H/sub x/CO and OH/sub x/CO (x = 0-3) species involved in methanol formation are computed to...
Bis[6-O,6′-O-(1,2:3,4-diisopropylidene-α-D-galactopyranosyl)thiophosphoryl] disulfide 1 (C48H76O24P2S4) crystallized from polar and/or nonpolar solvents ... MJ Potrzebowski,K Ganicz,Wodzimierz Ciesielski,... - 《Journal of the Chemical Society Perkin Transactions》 被引量: 24发表: ...
As stated earlier, the industry has recognized that admixtures of trichlorotrifluoroethane with polar components such as aliphatic alcohols greatly enhance the ability of trichlorotrifluoroethane alone to clean rosin fluxes from printed wiring boards. Unexpectedly, we found that adding the nonpolar ...
Two and three such factors were sufficient to reproduce the extended molar absorption spectra for the nonpolar and polar solvents, respectively. The detailed assignments of each factor were estimated using the calculated loadings and scores. A similarity analysis was also applied to the extended molar...
nonpolar molecules (and slightly polar gases) have been some of the more important tools for the natural gas process design engineers; however, less attention has been paid to the phase equilibrium properties of the compressed natural gases containing polar chemicals at low temperatures and high ...
Association of methanol and acetonitrile in a nonpolar (CDCl 3 ) and polar (H 2 O and D 2 O) solvents was studied by 1 H NMR spectroscopy and quantum chemistry. The results were compared with the data obtained by decomposition of the spectral curves in the range 800鈥 1100 nm by the ...
The false liquid-liquid splits that often occur when modelling polar-nonpolar binary mixtures can be avoided in most cases by either including upper critical solution points (UCSPs) in the fit, or by using a constrained fit. Including UCSPs in the fit gives a better control of how the ...