3D Simulation and Artificial Neural Networks Application in the Diffusion Study of Champignon Mushroom/Solution Interface During the Salting

The influence of the film formed during the salting of champignon mushrooms with brine containing NaCl and KCl was modeled using the finite elements method (FEM). It was verified that the film formed on the mushroom surface had a greater influence in the static salting since the diffusion of the ions was 7.5-fold smaller in this system than in the stirred salting. The application of self-organizing maps showed that the ions diffusion along the surface of the solid presented a heterogeneous occurrence and depended on the region for both static and stirred salting. A direct relation was observed among the mushroom surface morphology, the salts diffusion behavior, and the film formation. In addition, the film was not completely extinguished in the stirred system, although it has a minimal influence as the film formation is also dependent on the biosolid surface.

Diffusion Study of Cream Formula of Lyophilized Ethanol Extract of Moringa oleifera L. Leaves

Background: Moringa oleifera L. leaves have analgesic activity due to their flavonoids content. These polar antioxidants compounds usually have difficulty to diffuse through the skin. Objectives: The purpose of this study was to evaluate the diffusion parameters of cream contains the lyophilized of M. oleifera leaves ethanol extract. Material and Methods: The lyophilized of M.oleifera leaves ethanol extract (5%) formulated as an o/w cream with 2% of cetyl alcohol as a stiffening agent. The physical characteristics of the cream were determined for organoleptic, homogeneity, pH, viscosity, spreadability, and type of emulsion parameters. The diffusion parameters were determined with Franz cell diffusion using the skin's snake as a membrane with 0; 10; 30; 60 and 90 minutes sampling time. Results: Physical characteristics of the cream showed that o/w as the cream type with pH, viscosity, and spreadability value were 4.72±0.03; 14.000±225 cps; and 5.7±0.20 cm, respectively. The diffusion parameter showed total flavonoids penetrate through the membrane was 360.134±0.20 µg/cm2 with flux 239,875 µg/cm2hr. Conclusions: This study showed a cream formulation that fulfills the required physical characteristics standard and can deliver active compounds to penetrate through the membrane.

Design and development of zolmitriptan niosomal in situ nasal gel for the treatment of migrain

The objective of the present study was to development of Zolmitriptan (ZMT) niosomal in situ nasal gel formulation for migraine treatment. By intranasal route delivered drug to the central nervous system (CNS) through the olfactory lobes, which bypasses the first-pass metabolism and consequently enhances the bioavailability. Noisome of ZMT were prepared by using the lipid film hydration method. Optimized niosomal formulation was used to prepare in situ gel. The developed Noisomal formulations were characterized for vesicle size, shape, zeta potential, entrapment efficiency, drug content and in-vitro diffusion study, mucoadhesive strength, permeation study, FTIR, DSC and XRD studies. The FTIR and DSC studies predicted that there was no any interaction in drug and excipients. ZMT niosomes were showed particle size, Polydispersity index (PDI), Zeta potential, % entrapment efficiency and drug content, 149nm, 0.223, -28.9, 88.16±0.8 % and 96.23±1.2% respectively. In-vitro diffusion study of niosomes shows 96.23±0.7% at 8h. The permeation rate of in situ niosomes gel and the pure drug was about 98.56% and 79.46%, respectively. XRD & DSC studies were showed that reduce crystalinity in the formulations. The SEM images of niosomes were found spherical in shape to some extent showing particle size distribution. Thus, it can be concluded that developed ZMT niosomal in situ gel formulation can be considered as a promising system for which may reduce dose requirement, improve patient acceptability and efficient targeting drug delivery to the brain through the olfactory lobe for migraine treatment.

Diffusion of Innovations

The main concepts of the diffusion of innovations represent a hybrid change research and practice paradigm that blends ideas that can now be found in life cycle, evolutionary, and teleological theories of social change. This chapter discusses why the paradigm developed in the ways that it did, including the shortcomings of this approach, especially for studying the role of organizations in change processes. The chapter also examines the rapid rise of dissemination and implementation science as conducted by health services and public health researchers and how those new literatures are related to diffusion. This paradigmatic evolution from descriptive and explanatory studies to intervention research utilizing diffusion concepts is a theme of this chapter, with emphases on organizational implementation of innovations, inter-organizational diffusion, external validity of innovations and how a recognition of the agency of adopters can reshape diffusion study.

HIGH-PERFORMANCE LIQUID CHROMATOGRAPHIC ESTIMATION METHOD FOR TRANSDERMAL DIFFUSION STUDY OF GRANISETRON

Objective: The study is aimed to develop a simple, isocratic and sensitive reversed-phase high-performance liquid chromatography method for the analysis of granisetron during transdermal permeation studies through porcine ear epithelium. Methods: A reversed-phase (C18) column was used with ultraviolet detection at 210 nm. Selected mobile phase contained 25% (v/v) of acetonitrile and 75% (v/v) of 0.25 mM potassium dihydrogen orthophosphate solution pH adjusted to 3.0 using 1% orthophosphoric acid solution. Results: Calibration curve showed good linearity over 0.1–30 μg/mL concentration range of porcine ear permeates in 80% ethanol and 20% water (blank permeates). The applicability of the method was demonstrated by the analysis of diffusion study samples of granisetron through porcine ear epithelium and the steady-state permeability flux (J) from ethanolic solution was found to be 4.707 µg/square cm/h. Conclusion: The developed method can be used in the analysis of diffusion study samples of granisetron transdermal formulations through the porcine ear epithelium.