Posted by admin on May 1, 2012 in |
In the present investigation, an attempt has been made to prepare sustained release microspheres of Glibenclamide by using Eudragit RS 100 as rate retardant polymer. Microspheres were successfully prepared by non-aqueous emulsion solvent evaporation method. Magnesium stearate was used as hydrophobic dispersant and droplets stabilizer. The yields were varies from 90-97% and encapsulation efficacy is up to 94% which encourage the investigation. The desired sizes of microspheres were obtained when the stirring was carried out at 600 rpm. The in-vitro dissolution profile of optimized formulation batch i.e., F5 is resulted up 11.5 hours. The various parameters of model equation of microspheres containing Glibenclamide in vitro kinetic release were thoroughly investigated and it was seen that the statistically significant confined to Zero- order, Higuchi Model and Korsmeyer-Peppas Model. To establish the release kinetic, Korsmeyer-Peppas Model shows the prominent release characteristics and the release pattern is non-fickian diffusion controlled. The SEM photograph of microspheres confirmed good spheres and smooth surface of the microspheres. The IR and DSC studies used to of...
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Posted by admin on May 1, 2012 in |
Mikania scandens is a rapidly growing herbaceous to semi-woody, perennial vine. It grows quickly over other plants such as young trees, smothering them; it can climb trees up to 25 m tall. Although not as serious a weed as M. chordate, in Southeast Asia it has become a hard to eradicate weed of tea, rubber, and other plantation crops. It also reduces the carrying capacity of pasture. The achenes are spread by wind, water and animals. The plant also reproduces by old rootstocks, runners and suckers. It is still under investigation. Although it has some analgesic and anti-inflammatory properties, but these uses are not widely accepted till now. Folkloric uses include utilisation of the herb as an anticoagulant or other medicinal purpose. The aim of the undertaken work is to identify and isolate the chemical constituents of the plant Mikania scandens and to evaluate its reported analgesic...
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Posted by admin on May 1, 2012 in |
The present study was aimed to evaluate the antihyperlipidemic effect of aqueous extract of stem of Tinospora cordifolia in streptozotocin induced diabetic and diet induced hyperlipidemic rats. Diabetes mellitus was induced in male albino Wistar rats by intraperitoneal injection of streptozotocin (45 mg/kg b.w.). Hyperlipidemia was induced in diabetic rats by feeding 0.5% cholesterol and 0.1% cholic acid on diet basis in arachis oil (10 ml/kg b.wt) orally throughout the experimental period and simultaneously, the treatment groups received T. cordifolia (100 and 200 mg/kg b.w.) orally for 14 days. Glibenclamide (600 µg/kg b.w) was used as a standard antidiabetic drug and atorvastatin (1.2 mg/kg b.w.) was used as a standard antihyperlipidemic drug. Serum glucose levels were determined at weekly intervals and serum cholesterol, triglycerides, HDL-C, creatine kinase and free fatty acids were analyzed at the end of the experiment. Aqueous extract of T. cordifolia at 200 mg/kg b.w. dose decreased serum glucose, cholesterol, triglycerides, creatine kinase, and free fatty acids to normal level when compared to that of standard...
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Posted by admin on May 1, 2012 in |
Due to the outbreak of infectious diseases caused by different pathogenic bacteria and the development of antibiotic resistance, the pharmaceutical companies and the researchers are now searching for new unconventional antibacterial agents. Nanotechnology represents a modern and innovative approach to develop new formulations based on metallic nanoparticles with antimicrobial properties. The potential bioactivity of chemically fabricated silver nanoparticles has been extensively studied. However, the antibacterial activity of silver nanoparticles individually or in combination with different antibiotics has not been demonstrated. In the present investigations, the effect of silver nanoparticles on the antibacterial activity of different antibiotics was evaluated against selected human bacterial pathogens such as Staphylococcus aureus, Streptococcus epidermis, Escherichia coli, Pseudomonas aeruginosa, and Bacillus cereus by disc diffusion method.In the presence of sub – inhibitory concentration of silver nanoparticles (100µL/disc), the antibacterial activities of all antibiotics are increased from 1 mm to 10 mm. The maximum fold increase was noticed for vancomycin against Pseudomonas aeruginosa (66.67%), Escherichia coli (62.50%), and Staphylococcus aureus (46%) followed by rifampicin against Bacillus...
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Posted by admin on May 1, 2012 in |
This study describes the effect of Guar gum and chitosan on formulation of mucoadhesive drug delivery system of itraconazole. Mucoadhesive strength, Drug content, Hardness, Friability, Weight variation, Moisture content and accelerated stability studies were performed to study the effect of polymers on prepared mucoadhesive tablets. Results of the present study clarified the potential of guar gum and chitosan in mucoadhesion and control release of itraconazole tablets. Both polymers i.e. Chitosan and guar gum were helpful for controlling the drug release in better way when used in proper combinations. When result of mucoadhesion was checked guar gum gives more mucoadhesive strength to the prepared tablets as compared to chitosan. Accelerated stability studies were performed on prepared formulations, results indicates that the formulations were stable that mince excipients used in the formulations were stable and are not causing major changes in drug release pattern after a period of 6 months. From above mentioned work it can be concluded that combination of Chitosan and guar gum is better and effective approach to...
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