Synopsis The effect of several variables on the in vitro permeation of urea through hairless mouse skin has been studied in order to determine the causes of an increasing permeability phenomenon found in studies with a range of hydrophilic compounds. The permeation of urea increased for a period of approximately 100 h after which a steady state permeation pattern was observed for approximately ...

In this study, the hydrogen permeation in the supercooled liquid state for Ni65Nb25Zr10, Ni60Nb20Zr20 and Ni55Nb15Zr30 metallic glasses was investigated in conjunction with the discussion on the effect of hydrogen diffusion on hydrogen permeation. The hydrogen permeation of the Ni65Nb25Zr10 and Ni60Nb20Zr20 metallic glasses increases significantly by the transition from the glassy solid state t...

The purpose of this work was to study the effect of various permeation enhancers on the permeation of salbutamol sulphate (SS) buccal patches through buccal mucosa in order to improve the bioavailability by avoiding the first pass metabolism in the liver and possibly in the gut wall and also achieve a better therapeutic effect. The influence of various permeation enhancers, such as dimethyl sul...

comnode classification within membrane residue curves (m-rcms) currently hinges on lyapunov’s theorem and therefore the computation of mathematically complex eigenvalues. this paper presents an alternative criterion for the classification of nodes within m-rcms based on the total membrane flux at node compositions. this paper demonstrates that for a system exhibiting simple permeation behaviour...

Abstract The smart membrane is a new type of functional membrane. performance this changed according to the variations in external physical and chemical signals. This has become an essential focus specific recognition, catalysis, selective permeation, other fields. However, problems are weak anti-pollution ability, poor response performance, inability mass production. Therefore, scholars have d...

Ethanol is considered as a renewable transport fuels and demand expected to grow. In this work, trends related bio-ethanol production are described using Thailand an example. Developments on high-temperature fermentation membrane technologies also explained. This study focuses the application of membranes in ethanol recovery after fermentation. A preliminary simulation was performed compare dif...

objective(s) in this study, a kind of ph sensitive composite membrane was prepared and drug permeation through it was investigated in terms of ph. rationale of this study originated from the fact that a ph change which may be a result of a disease state in the body can trigger drug release. materials and methods  here, a kind of ph sensitive composite membrane containing different nanoparticle ...

The oxygen permeation performance of Ba0.5Sr0.5Co0.8Fe0.2O3−δ (BSCF) mixed-conducting multichannel hollow fiber (MCMHF) membranes was improved by surface modification via spin-spraying of a La0.6Sr0.4CoO3−δ (LSC) porous layer. At 1173 K, the oxygen permeation flux of the modified membranes was clearly enhanced and reached 9.68 mL·cm−2·min−1, which is a remarkable high value in the field of mixe...

Abstract: The objective of this study was to fabricate topical formulations of diclofenac diethylamine (DD) using isopropyl myristate (IPM) and isopropyl palmitate (IPP) as permeation enhancers. Franz cell and bacterial cellulose were used as analytical instrument and diffusion membrane, respectively. Permeation enhancers exhibited significant effect on the permeation characteristics of DD. It ...