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In ocular tissue, arachidonic acid is metabolized by cyclooxygenase to prostaglandins which are the most important lipid derived mediators of inflammation. Presently nonsteroidal anti-inflammatory drugs (NSAIDs) which are cyclooxygenase (COX) inhibitors are being used for the treatment of inflammatory disorders. NSAIDs used in ophthalmology, topically, are(More)
In vitro transcorneal permeation of diclofenac from oil drops was studied using freshly excised goat cornea. The maximum apparent corneal permeability coefficient (Papp) was obtained with 0.2% (w/v) diclofenac drops in sesame oil followed by safflower oil, while formulation in castor oil provided minimal Papp. The addition of benzyl alcohol, a preservative,(More)
The distribution of a previously described repeated DNA sequence present as a 1.3-kb PstI fragment in the genome of the rice blast fungus Magnaporthe grisea was analysed by carrying out DNA fingerprint analysis of 36 isolates including rice, non-rice and laboratory strains. The analysis of various higher-molecular-weight PstI fragments with homology to the(More)
Various aqueous and oily diclofenac ophthalmic formulations were subjected to accelerated and long term stability studies. Degradation of diclofenac was found to follow first-order kinetics. Among the aqueous formulations containing preservative, formulation with PMA, PMN, SA, MP/PP and SMS showed diclofenac content above 90% after 6 months of accelerated(More)
Tropicamide-loaded carboxymethyl tamarind kernel polysaccharide (CMTKP) nanoparticles were prepared and evaluated for ocular delivery. Preparation of ionotropically gelled CMTKP nanoparticles was optimized employing three-levels, two-factor central composite design. Concentration of polymer and crosslinker had significant synergistic effect on particle size(More)
The present study was aimed to prepare tamarind seed nanoaggregates and its evaluation for ophthalmic delivery. The preparation of tropicamide-loaded tamarind seed xyloglucan nanoaggregates was optimized using face centred central composite experimental design, employing the concentrations of tamarind seed xyloglucan and Poloxamer-407, as independent(More)
A series of isonicotinic acid hydrazide derivatives (1–19) was synthesized and tested in vitro for antimycobacterial activity against Mycobacterium tuberculosis and antimicrobial activity against Staphylococcus aureus, Bacillus subtilis, Escherichia coli, Candida albicans, and Aspergillus niger and the results indicated that the compounds with OH, SCH3, and(More)
The effect of formulation factors on permeation of diclofenac from some experimental and marketed aqueous eye drops through excised goat cornea was evaluated. Raising the pH of formulation from 6.0 to 8.0 or diclofenac concentration from 0.05 to 0.15% (w/v) or adjusting tonicity with mannitol or addition of viscolizing agent decreased apparent permeability(More)
The resurgence of tuberculosis and emergence of multidrug resistant isolates has focused attention on the need for an improved understanding of molecular aspects of the disease, and for elucidation of the factors responsible for drug action and resistance. Isoniazid is the frontline drug employed in the treatment of tuberculosis. Recent research has probed(More)
A series of isonicotinic acid-1-(substituted phenyl)-ethylidene/cycloheptylidene hydrazide derivatives (1–12) was tested for their, in vitro antimycobacterial activity against Mycobacterium tuberculosis, and compound 2 was found to be more active than isoniazid. The antiviral screening results indicated that none of the tested compounds was active against a(More)