Journal Name: Zeitschrift für Naturforschung B Volume: -1 Issue: ahead-of-print

Wettability alteration appears to be an important physiochemical process during low salinity waterflooding in carbonate reservoirs. However, the leading factor(s) behind wettability alteration remains unclear. In particular, the relative contribution of calcite dissolution induced pH and Ca2+ increase has not been explicitly quantified. We thus hypothesized that the pH increase plays a significant

In recent years, numerous studies have focused on enhancing water permeability and ion retention by oxidizing pristine graphene membranes. Despite advanced modification and successful applications, the physical properties involved in the separation processes by graphene oxide nanochannels, such as the dielectric constant are not fully understood. A series of molecular dynamics simulations are carried

Infinite dilution activity coefficients and gas-to-liquid partition coefficients are herein reported for more than 45 organic solutes of varying polarity and hydrogen-bonding character dissolved within the ether-grafted ionic liquids 1-ethyl-3-(2-methoxyethyl) imidazolium bis(trifluoromethylsulfonyl) imide and N-(2-methoxyethyl) pyridinium bis(trifluoromethylsulfonyl)imide. Experimental values were

The thermophysical properties of biodiesel surrogates are of great importance for the development of the new and clean fuel substitutes or additives. Experimental investigation and molecular dynamic simulation of the related thermophysical properties such as the liquid density, kinematic viscosity and surface tension over a sufficient wide temperature range will facilitate the corresponding researches

The momentum and thermal boundary layer flow problem for shear thinning fluid with modified viscosity model over moving wedge is discussed. The mathematical model of the problem is developed by using improved Carreau model relates viscosity to shear rate and using the thermal conductivity model in the similar form of viscosity expression. The improved Carreau model contains five-parameters: zero viscosity

Diglycidyl ether of bisphenol A (DGEBA) epoxy resin is cured by two typical diethylene triamine-derived curing agents which have a versamid structure (VDETA) and a butyl ether structure (BDETA) in their molecules respectively, and the exothermic curing kinetics of epoxy/amine is studied by non-isothermal, isothermal DSC and in-situ FT-IR methods. It is found that VDETA hardens epoxy resin more gently

Solvent extraction plays a significant role as an energy-efficient treatment method in the recovery of phenol from wastewater, and a key step is to screen a promising extraction agent with a highly efficiency and good chemical stability. In this study, dibutyl ether (DBE) with low solubility and good stability was selected as the potential solvent to remove phenol from aqueous phase. Liquid-liquid

We study theoretically the resonance scattering of positronium (Ps) atoms by nitrogen molecules and compare it with resonance e –N 2 scattering in the Π g symmetry. The velocity positions of the Ps–N 2 resonances in Σ u , Π u , and Δ g symmetries are very close to the velocity position of the e –N 2 resonance which leads to the total Ps–N 2 cross section being very similar to the e –N 2 cross section

The single and double ionization of helium in intense 2 ω : ω bicircular laser fields is analyzed with a classical ensemble method. A high-performance computational cluster is utilized to generate high-resolution data and to probe low-rate events. It is found that both counter- and co-rotating fields support rescattering and non-sequential double ionization (NSDI). The effects of scattering off of

Quantum key distribution (QKD) has reached a global scale by utilizing the powerful scheme in free space scenes with a more flexible transmission. Unfortunately, the practical applicability of free-space QKD is usually curtailed by the fact that the atmospheric turbulence unavoidably destructs the quality of the quantum signal, which limits its maximum transmission distance. Here we propose an attenuation