Posted by admin on Aug 1, 2013 in |
The purpose of writing this review on floating drug delivery systems (FDDS) was to compile the recent literature with special focus on the types of floating drug delivery systems, principal and mechanism of floatation to achieve gastric retention. Drug delivery systems are those that float immediately upon contact with gastric fluids present promising approaches for increasing the bioavailability of drugs with absorption windows in the upper small intestine. However, immediate floating can only be achieved if the density of the device is low at the very beginning. Devices with an initially high density (which decreases with time) first settle down in the stomach and, thus, undergo the risk of premature emptying. Inherent low density can, for example, be provided by the entrapment of air or by the incorporation of low density materials or foam powder. This review explains briefly about factors affecting floating system, evaluation parameters and application of the...
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Posted by admin on Aug 1, 2013 in |
Nanoparticles of silver (Ag-NPs) have received tremendous research attention for their widespread applications in recent times. The most significant one is their antibacterial properties for which they have been used from food storage to medical supplies. The present study describes a novel green synthesis of silver nanoparticles by using Mangifera Indica and Syzygium cumini leaf extract. The green synthesized silver nanoparticles had been confirmed by UV-Vis spectrum of the reaction media. The UV-Vis spectrum of green synthesized silver from Mangifera Indica and Syzygium cumini have maximum absorbance peaks at 370 and 350 respectively. The Based on the findings, it seems very reasonable to believe that this greener way of synthesizing silver nanoparticles is not just an environmentally viable technique but it also opens up scope to improve their antibacterial...
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Posted by admin on Aug 1, 2013 in |
Drug delivery systems including chemical, physical and biological agents that can enhance the bioavailability, improve pharmacokinetics and reduce toxicities of the drugs. Carrier erythrocytes are one of the most promising biological drug delivery systems investigated in recent decades. Resealed Erythrocytes are biocompatible, biodegradable, possess long circulation half-life and can be loaded with variety of active drug substances. Resealed erythrocyte has got several advantages over the other drug delivery system which makes it superior than other systems. Carrier erythrocytes are prepared by collecting blood sample from the organism of interest and separating erythrocytes from plasma. By using various methods, the cells are broken and the drug is entrapped into the erythrocytes, finally they are resealed and the resultant carriers are then called “resealed erythrocytes”. Resealed erythrocytes, as a drug delivery system has excellent capacity to enhance the therapeutic index and patient compliance. It has got tremendous potential to achieve site specific drug delivery with least wastage of drugs and it also prolong the release of drug. So many drugs like...
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Posted by admin on Aug 1, 2013 in |
Traditional knowledge and ethno–botanical use of plants have been widely acknowledged all over the world. In the present scenario, emergence of multiple drug resistance to human pathogenic organisms, this has necessitated a search for new antimicrobial substances from other sources including plants. Combretum albidum, a traditional medicinal liana, used by rural peoples, villagers and tribals residing in different parts of Maharashtra, Tamil Nadu and Kerala, to treat various ailments. The Muthuvans, Chinnar tribe of Idukki district, Kerala is using stem bark of this plant as a remedy for Jaundice. The present study carried out to check the antimicrobial activity of water and methanol extracts of stem bark of C. albidum. The result showed significant antibacterial activity against Escherichia coli, Klebsiella pneumonia, Proteus mirabilis, Pseudomonas aeruginosa, Bacillus subtilis and Salmonella...
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Posted by admin on Aug 1, 2013 in |
A simple HPTLC method has been developed for the estimation of Gallic acid and Piperine in methanolic extract of Zeal herbal granules [ZHG], a Polyherbal formulation. The separation was performed on TLC aluminum plates precoated with silica gel 60 F254, good separation was achieved in the mobile phase of toluene: ethyl acetate: formic acid (11: 15: 1v/v/v) and densitometry determination of Gallic acid (0.50 Rf) and Piperine (0.70 Rf) was carried out at single wavelength scanning at 254 nm. The method validated as per ICH guideline, shows regression co-efficient value for Piperine 0.9992 and 0.9979 for Gallic acid in range of 40-90 µg/mL Recovery of Piperine and Gallic acid in final product found in range of 98-102%. Precision study (interday & intraday) showed that the relative standard deviation is less than 2%, showing method is well precise. Quantification study shows 0.23 % w/w of Piperine and 0.37 % w/w of Gallic acid in ZHG. Present study shows that developed method is simple, precise, specific, robust and accurate, and could...
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