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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Posted by admin on Apr 1, 2012 in |
The present studies that Isolation of preliminary phytoconstituents and anti-inflammatory and antipyretic activity of Calotropis gigantea Linn. Leaves Extracts. Therapeutic use of plants for the treatment of human illnesses dates back over man millennia. Evidence of their effectiveness in the diagnosis, cure and prevention of disease states exists in every culture throughout the world. Today “traditional medicine,” characterized by the use of herbs and other natural products still remains a regular component of health care in countries such as China, Japan, India, South America and Egypt. The search for anti-inflammatory and analgesic agent in modern was marked by the introduction of salicin for the treatment of inflammatory swellings due to rheumatic fever and rheumatoid arthritis. The ethanol extract and distilled water extract showed good significant reduction in paw oedema as compared to control group, where as Petroleum ether (60-80oC) extract, Chloroform extract, Ethyl acetate, n-Butanol has showed comparatively less significant reduction in paw oedema volume. The chloroform and n-butanol extract showed good significant reduction in rectal temperature as compare...
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Posted by admin on Apr 1, 2012 in |
A simple, rapid, precise, accurate, sensitive and time consuming reverse phase high performance liquid chromatography (RP-HPLC) and spectrophotometric method for simultaneous estimation of atorvastatin and amlodipine in pharmaceutical dosage forms have been developed and validated. Drug was resolved on a C18 column (Phenomenex phenyl hexyl column, 250mm* 4.6mm i.d, 5um). Utilizing mobile phase of water with 0.4%v/v triethyl amine and acetonitrile with diluted orthophosphoric acid pH adjusted to 5.2 in a ratio of 52.5:47.5 of water and acetonitrile respectively. Mobile phase was delivered at the flow rate of 1.0ml/min. Ultraviolet detection was carried out at 229nm. Separation was completed within 7.75 minutes. Calibration curve was linear with correlation coefficient (r2)=0.999. Over a concentration range 5-25ug/ml, using diclofenac 10ug/ml as IS. Recovery was between 99.26, 100.2 percentage. In spectrophotometric method it involves the formation and solvation of simultaneous equation at 242nm for Atorvastatin and 256nmfor Amlodipine using Acetonitrile and Water (10:90) as mobile phase. The standard deviation was found to be less than 1% for the assay of tablet. The...
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Posted by admin on Apr 1, 2012 in |
General phytochemical screening of Phyllanthus amarus (Euphorbiaceae) revealed the presence of Saponin, tannins, glycoside and alkaloids etc. The aim of this study is to identify and characterize the bioactive principle from the plant. It has wide folk medicinal uses. The isolation and characterization of Phytoconstituents was done from the methanolic extract by the gradient fractionation method. The structure of the isolated compound was established on the basis of physical, chemical test and spectroscopic evidences (IR, UV, 1HNMR, MS). A flavonol structure was isolated from the methanolic extract of the plant. The odorless, colorless compound which solubilizes in methanol having m.p. 186oC and Rf value 0.46 in mobile phase Methanol: Glacial Acetic Acid: Water (90: 5: 5) was identified by the various spectroscopical methods. So from this study it is concluded that isolated compound may be rutin which is responsible for various pharmacological activities of the...
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