http://nopr.niscpr.res.in/handle/123456789/26153 2026-10-09T15:25:27Z http://nopr.niscpr.res.in/handle/123456789/26524 Title: Synthesis of Some New 1-[5'-{(2-benzothiazolylthio)methyl}-1', 3', 4'-thiadiazol-2'-yl]-4-substituted-3-chloro-2-azetidinones : Antimicrobial Agent Authors: Guru, Niharika; Srivastava, S D Abstract: A series of 2-arylideneamino-5-[(2-benzothiazolylthio) methyl]-1<i>'</i>, 3<i>'</i>, 4<i>'</i>-thiadiazoles (<b>4a-j</b>) have been synthesized via condensation of 2-amino-5-[(benzothiazolylthio)methyl]-1, 3, 4, thiadizole <b>3</b> with various carbonyl compounds. Cycloaddition of chloroacetylchloride to <b>4</b> gives 1-[5<i>'</i>-{(2-benzothiazolylthio) methyl}-1<i>'</i>, 3<i>'</i>, 4<i>'</i>-thiadiazol-2<i>'</i>-yl] -4-substituted -3-chloro-2-azetidinones (<b>5a-j</b>) have been synthesized as the final products. All the products have been screened for their antifungal and antibacterial activity against some selected pathogens and found to exhibit mild to pronounce activity. Page(s): 601-605 2001-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/26523 Title: Domestic Refrigerators: Field Studies and Energy Efficiency Improvement Authors: Bhatt, M Siddhartha Abstract: The paper reports the studies on evaluation of energy indices of domestic refrigerators of 165 L capacity in India. The specific energy consumption varies between 3.23 and 4.19 kWh/y/L for single door manual defrost units and between 3.84 and 4.78 kWh/y/L for double door auto defrost units. The major technical areas in a modernization programme are the use of alternatives to HCFC 22, the introduction of more efficient controls and better insulation. Though energy efficient and eco-friendly domestic refrigerators are cost-effective, forces driving technology upgradation such as energy labeling, minimum efficiency standards and incentives to industries are essential to bring about renovation in the domestic refrigerator technology. Page(s): 591-600 2001-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/26522 Title: Inferential Model for pH Control Authors: Chaudhuri, Uttam Ray; Chaudhuri, Utpal Ray Abstract: An inferential model pH control strategy based on fundamental relations for pH neutralization has been developed. The inferential model was simulated to analyze performance of the pH control scheme and then compared with an experimental acidbase neutralization system. Page(s): 586-590 2001-07-01T00:00:00Z http://nopr.niscpr.res.in/handle/123456789/26521 Title: Flyash Incorporation Effect on Soil Health and Yield of Maize and Rice Authors: Sharma, S K; Kalra, Naveen; Singh, G R Abstract: Field experiments were conducted in villages around National Capital Power Project (NCPP), Dadri, Uttar Pradesh, India during 1995 to evaluate flyash incorporation effects on soil health and growth and yield of maize (<i>Zea mays</i> <i>L.</i>)<i> </i>and rice (<i>Oryza</i> <i>sativa L.</i>).<i> </i>Flyash application levels (up to 10t/ha) were decided on the basis of an ash/dust fall range of 5 to 12 t/ha/y in the villages adjoining thermal power station. The grain yield of maize increased in flyash added plots, whereas rice yield was similar to flyash treated plots. Flyash added plots had marginally higher uptake of Zn, Cu, Fe, Mn, and Cd, but values were insignificant. Flyash application in soil resulted in lower bulk density. Flyash addition also reduced hydraulic conductivity and improved moisture retention at field capacity and permanent wilting point. These changes in the soil characteristics might have been due to modifications in the macro- and micro-pore size distribution which also contributed to increased yield of maize in light and medium textured soils. Page(s): 580-585 2001-07-01T00:00:00Z