Characterization of CO2 flow in propped fractures is important defining the response to injection for reservoir stimulation and sequestration. We measure evolution permeability shale both adsorbing non-adsorbing He under sub- super-critical conditions. A tripartite permeability-pressure curve obtained when supercritical, consisting a dual-U-shaped first below then exceeding critical pressure wi...

Numerical simulation of tritium permeation from breeding zones to the coolant in the helium cooled pebble-bed blanket is performed in this paper. 2D and 3D convection–diffusion models are developed to account for the effects of purge stream convection. Incompressible transient Brinkman model with variable permeability is used in flow calculation, and transient diffusion and convection equations...

In the study we formulated the serratiopeptidase loaded cholic acid conjugated and unconjugated chitosan mucoadhesive microspheres. It was observed that the conjugated microspheres show better permeation rate than unconjugated microspheres. Moreover the permeation enhancer increased the % cumulative drug permeation through the mucosal membrane from 69.37 % to 74.39 % for unconjugated microspher...

Understanding the mechanism of ion permeation across lipid bilayers is key to controlling osmotic pressure and developing new ways of delivering charged, drug-like molecules inside cells. Recent reports suggest ion-pairing as the mechanism to lower the free energy barrier for the ion permeation in disagreement with predictions from the simple electrostatic models. In this paper we quantify the ...

The effects of a sub-nanometer grain boundary in all-silica chabazite (CHA) zeolite membranes on their permeation properties were investigated by non-equilibrium molecular dynamics (NEMD). results indicated that at the total pressure 0.5 MPa, 298 K, CO2 selectivity toward CH4 drastically increased due to presence region inside membrane. This was consequence selective condensation boundary. calc...

Disinfectants may cause adverse effects directly on the skin or systemically by permeating through the skin. In this study breakthrough times were measured for surgical gloves with chemicals which are commonly used in healthcare. Classical methods of analytical chemistry were tailored for the permeation tests, which were carried out according to the European standard EN 374 and the American sta...

Insect repellent DEET and sunscreen ingredient oxybenzone play an essential role in minimizing vector-borne diseases and skin cancers. The purpose of this study was to investigate the effects of emulsion type, addition of thickening agent and droplet size in three emulsion-based lotions on percutaneous permeation of DEET and oxybenzone using in vitro diffusion experiments, in order to minimize ...

Protective ultra-thin barrier lms gather increasing economic interest for controlling permeation and di usion from the biological surrounding in implanted sensor and electronic devices in future medicine. Thus, the aim of this work was the investigation of the lm thickness in uence on the gas permeation barrier of ultra-thin, cytocompatible tetrahedral amorphous carbon (ta-C:H) lms on polyimide...