Acrylonitrile was polymerized in an aqueous sulphuric acid-methanol medium by an electrolytically generated mediator species, titanium(III). Titanium(III)-dimethylglyoxime was used as the initiator redox system. The reaction was confined to the cathode compartment and was found to proceed via a free radical mechanism. The kinetics of polymerization were investigated for different initial monomer concentrations, acid concentrations, electric currents, dielectric constants of the solvent and electrode materials. A suitable mechanism for titanium(III)-dimethylglyoxime-mediated indirect electropolymerization of acrylonitrile is proposed.

Background:Conventional anti-microbial therapy largely consisted of systemic administration of various drugs effective against periodontal pathogens, but fraught with several problems. Based on the concept of local drug delivery a bioresorbable device made of pure fibrillar collagen has been developed. The aim of this study was to study the release of Tetracycline from this collagen fiber (Type I collagen) impregnated with Tetracycline and its antibacterial activity against Porphyromonas gingivalis.Materials and Methods:Porphyromonas gingivalis was isolated from plaque samples of chronic periodontitis patients by using a CO2 incubator. DNA isolation was done followed by polymerase chain reaction (PCR) amplification to confirm the presence of bacteria. The release pattern of Tetracycline was assessed for a period of 10 days in water (group I) and Serum inoculated with Porphyromonas gingivalis (group II).Results:A significant presence of Tetracycline on all days in Group I and group II and the zone of inhibition was also present in both groups with a steady decline from day 1 to day 10.Conclusion:Since the results were well within the therapeutic concentration of drug required to inhibit the growth of gram –ve bacteria (Porphyromonas gingivalis), this bioresorbable Tetracycline fiber has the potential for clinical application.

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The corrosion inhibition of Garciniaindica extract (GIE) on 6063 aluminum alloy was investigated in 0.5 M sodium hydroxide (NaOH) solution by weight loss method and Tafel polarization techniques. The effects of inhibitor concentrations, temperature on the inhibitor action were investigated. Inhibition efficiency was found to increase with increase in concentration of inhibitor and it increased with increase in the temperature. The kinetic parameters and thermodynamic parameters were calculated. The adsorption of GIE was found to be through chemisorption and obeyed Langmuir adsorption isotherm.

The goals of any radiologic procedure in obstructive Jaundice are to confirm the presence of bile duct obstruction, its location, its extent & the probable cause. It should also attempt to obtain a map of the biliary tree that will help the surgeon to determine the best approach to each individual case. OBJECTIVES: 1. To evaluate the role of Ultrasound and CT in patients presenting with clinical features of obstructive jaundice. 2. To evaluate the causes of obstructive jaundice by Ultrasound and CT. PATIENTS AND METHODS: The study was carried with 45 patients from January 2006 to September 2007 who were attending the surgical and Gastroenterology Departments, Govt. General Hospital, Kurnool, which is an attached hospital to Kurnool Medical College, Kurnool. OBSERVATIONS AND RESULTS: In our study, there is female predominance with male: female ratio 1: 1.6.Majority of patients are in age group of 41-50 years. Jaundice was the commonest presentation in all patients followed by pruritis in 72% and pain abdomen in 67% of patients. Ultrasound identified the benign cause of biliary obstruction in 79.1% cases and the malignant cause in 61.9% cases. CT identified the benign cause of biliary obstruction in 91.6% of patients and the malignant cause in 80.9% cases.