A model for the physical description of water transport through steady-state permeation and dynamic sorption within perfluoro-sulfonic acid (PFSA) membranes has been developed. broad experimental campaign is conducted on several membranes, belonging to Aquivion class, varying both in thickness equivalent weight ( EW ). The data have used calibrate validate find correlations mass-transfer proper...

preformulation studies on transdermal dosage forms involve liberal use of animal skin for assessing the permeation characteristics of drugs, influence of permeation enhancers, optimizing the formulation variables etc. the restricted availability of animal skin due to concerns regarding prevention of cruelty to animals has generated considerable interest in developing polymeric films for use as ...

To fulfill the consumption demand of low-cost fuel ethanol, an advanced process for feedstock fermentation and bioethanol extraction was required. This study proposed a combined continuous solid-state distillation vapor permeation to extract ethanol from fermented sweet sorghum bagasse on basis technology. Ethanol undergoes only one phase transition separation in whole process, which drasticall...

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...

The self-assembly of two new types of stable hydrogen-bonded supramolecular aggregates-bisrosettes-that are based on parallel, connected CA3.M3 rosettes is reported. The minimization of intermolecular steric hindrance-peripheral crowding within the aggregate-is proposed as the structural feature responsible for selecting the cyclic CA3'M3 rosette over competing linear hydrogen-bonded networks a...

Wound dressing is an artificial skin that can meet the requirements such as higher vapor or gas permeation and protection of wound from infection and dehydration. Poly (vinyl alcohol) (PVA) hydrogel is one of the well-known polymer gel that due to its good biocompatibility, hydrophilicity and capability of swell in water or biological fluids has been used in several biomedical and pharmaceutica...

Graphene oxide membranes were recently suggested for applications in separation of ethanol from water using a vapor permeation method. Using isotope contrast, neutron reflectivity was applied to evaluate the amounts of solvents intercalated into a membrane from pure and binary vapors and to evaluate the selectivity of the membrane permeation. Particularly, the effect of D2O, ethanol and D2O-eth...