solvent diffusion
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Author(s):  
R.M. Allen‐King ◽  
R.L. Kiekhaefer ◽  
D.J. Goode ◽  
P.A. Hsieh ◽  
M.M. Lorah ◽  
...  

2022 ◽  
Vol 34 (2) ◽  
pp. 355-360
Author(s):  
Renuka Singh ◽  
Sukhcharn Singh ◽  
D.C. Saxena

The present study was designed to investigate the changes occur on Chenopodium album starch (CAS) after modification through quasi emulsion solvent diffusion (QESD) method. Modification of starch was carried out by HCl (0.1, 0.25, 0.50, 0.75 and 1M) followed by precipitation. The QESD modification significantly reduced the amylose content, water absorption capacity, oil absorption capacity, solubility as well as swelling power of treated starch. Gelatinization behaviour of modified starch showed an increase in pasting temperature. The SEM images showed the formation of regular and spherical shaped larger starch particles. There was an improvement in crystallinity from 20.01 to 29.86% after modification as shown in X-ray analysis. Overall, it indicates that QESD treatment results into formation of spherical crystalline agglomerates.


2021 ◽  
Vol 8 (10) ◽  
pp. 440-457
Author(s):  
Ponni Sujathan ◽  
Umesh Kumar Sharma

The objective of present work was formulation and evaluation of Metronidazole loaded microsponges for the management of diabetic foot ulcer via topical application and to reduce side effects. The microsponges were prepared by quasi-emulsion solvent diffusion method using different concentrations of Ethyl cellulose and Poly vinyl alcohol. The prepared microsponges were evaluated for particle size analysis, SEM, % production yield, % drug entrapment efficiency, in-vitro drug release studies, DSC and antimicrobial studies. FTIR studies shown that there was no interaction between drug and polymers. The optimum sustained release of drug around a period of 12hrs was shown by formulation F8. The n value of optimized formulation indicated that the drug release followed zero order kinetics. It was confirmed from the stability studies that the optimized formulation remained stable at 45±2℃ and 70±5% relative humidity. Keywords: Microsponges, Metronidazole, Diabetic Foot, Quasi-emulsion solvent diffusion, Sustained release, Scanning electron microscopy, Differential scanning calorimetry.


2021 ◽  
Vol 10 (10) ◽  
pp. 1964-1970
Author(s):  
J Jayabharathi ◽  
A Lakshmanan ◽  
P Divyabharathi ◽  
K Raja ◽  
K Chandrakumar

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3302
Author(s):  
Antony V. Samrot ◽  
Sree K. Samanvitha ◽  
N. Shobana ◽  
Emilin R. Renitta ◽  
Puvanesvaran Senthil Kumar ◽  
...  

Polyhydroxyalkanoates (PHAs) are storage granules found in bacteria that are essentially hydroxy fatty acid polyesters. PHA molecules appear in variety of structures, and amongst all types of PHAs, polyhydroxybutyrate (PHB) is used in versatile fields as it is a biodegradable, biocompatible, and ecologically safe thermoplastic. The unique physicochemical characteristics of these PHAs have made them applicable in nanotechnology, tissue engineering, and other biomedical applications. In this review, the optimization, extraction, and characterization of PHAs are described. Their production and application in nanotechnology are also portrayed in this review, and the precise and various production methods of PHA-based nanoparticles, such as emulsion solvent diffusion, nanoprecipitation, and dialysis are discussed. The characterization techniques such as UV-Vis, FTIR, SEM, Zeta Potential, and XRD are also elaborated.


Author(s):  
Anjli Chauhan ◽  
Gaurav Gupta ◽  
Pratyush Jain ◽  
Alok Pal Jain

Poor aqueous solubility of drugs is major limiting factor with many new drugs in their successful launch in market in spite of their potential pharmacokinetic activity. Therefore, poor solubility is critical factor if the molecule is to survive the pharmaceutical development process. In the current work, it was planned to enhance the solubility of antihyperlipidemic drug by solvent diffusion technique. For this the drug clofibrate and excipients were procured and spherical agglomerates were prepared and evaluated. The findings of the study states the novelty the hypothesis. Keywords: Solubility, Diffusion, Agglomerates


2021 ◽  
pp. 152808372110362
Author(s):  
Zhenrong Zheng ◽  
Yuejiao Bi ◽  
Lihuan Tong ◽  
Yalan Liu

Fabric it is not an impermeable substrate because of fiber porosity. To study the solvent diffusion mechanism of coated fabric in the curing process, the drying model of PMMA/acetone coated glass fiber fabric was established. This drying model was verified by confocal Raman spectroscopy. Finally, the impact of fabric structure, thickness and porosity on the solvent diffusion process in coated fabrics was studied by the model. It was shown that the predicted solvent concentrations by the model were consistent with the experimental values. This model can be used to quantitatively calculate the solvent concentration at any position and at any time inside the coating film during the drying process. Moreover, it can also predict the curing time and residual solvent concentration of the coating fabric required to reach drying equilibrium. Compared with coated 3/1 twill, 5/3 satin and 2/1 twill, the solvent diffusion of coated plain fabric was faster during curing. Under the same environmental conditions, the thinner the fabric was and the greater the porosity was, the shorter the curing time was. The fitting equations for fabric thickness, fabric porosity and drying time were obtained, which can provide a theoretical guidance for the preparation, performance research and drying conditions optimization of PMMA coated textile materials.


2021 ◽  
pp. 1-11
Author(s):  
Zhenrong Zheng ◽  
Yuejiao Bi ◽  
Xiaoming Zhao ◽  
Jiawei Wang ◽  
Jianjian Nie

RSC Advances ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 1039-1049
Author(s):  
Yanchen Liu ◽  
Bin Huang ◽  
Long Zheng ◽  
Muyuan Shen ◽  
Zonghua Pu ◽  
...  

The N-doped mesoporous carbon material prepared by a double-solvent diffusion pyrolysis method with UIO-66-NH2 as a precursor can deliver a high reversible capacity of 346 mA h g−1 at 100 mA g−1 when used as an anode for non-aqueous KIBs.


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