http://nopr.niscair.res.in/handle/123456789/725 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/765 Title: Utilization of waste lime sludge as building materials <br/> <br/>Authors: Singh, M; Garg, M <br/> <br/>Abstract: Lime sludge (chalk) obtained from fertilizer industry has been tried as the constituent of masonry cement, burning of lime sludge to make building lime, as raw material for making flooring tiles and compounding of burnt lime waste with surkhi/fly ash to make lime-pozzolana mixtures / composite mortars. Characteristics and techno-economics of building products made out of lime sludge have been discussed. <br/> <br/>Page(s): 161-166 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/764 Title: Biosorption of copper from wastewater using jatropha seed coat <br/> <br/>Authors: Jain, Niveta; Joshi, H C; Dutta, S C; Kumar, Sanjeev; Pathak, H <br/> <br/>Abstract: Jatropha (Jatropha curcas L.) seed coat was investigated for removal of Cu (II) from aqueous solutions. Impact of pH of the solution, sorption time, and initial metal ion concentration on sorption capacity was investigated. Adsorption equilibrium was reached in 80 min and 82-89% of Cu (II) was removed by jatropha seed coat at initial Cu (II) concentrations (20-50 mg l⁻¹). Adsorption data, analyzed using Langmuir, Freundlich and Redlich–Peterson isotherms, showed that adsorption equilibrium followed Langmuir and Freundlich isotherms. Kinetics of adsorption followed Elovichian rate equation at 30°C. The most plausible mechanism of adsorption seemed to be electrostatic attraction of Cu (II) towards lignocellulosic polar groups of jatropha seed coat. The study showed that powdered jatropha seed coat can be used as an adsorbent for removal of Cu (II) from wastewater. <br/> <br/>Page(s): 154-160 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/763 Title: Energy efficiency improvement in air heater of a tea unit - A case approach <br/> <br/>Authors: Balachandran, S; Rudramoorthy, R <br/> <br/>Abstract: This paper evaluates efficiency of air heater and discusses system modifications carried out in air heater used in one of the tea units. Field trials indicate that these driers are operating at very low efficiency due to age-old design and improper selection of materials. Operational system changes have improved performance of heater and firewood consumption has dropped to about 100 kg/h from 160 kg/h resulting in a saving (38%) with little or no investment. <br/> <br/>Page(s): 151-153 Tue, 29 Jan 2008 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/762 Title: Effect of casting solvent on permeability of antihypertensive drugs through ethyl cellulose films <br/> <br/>Authors: Murthy, T E Gopala Krishna; Kishore, V Sai <br/> <br/>Abstract: Ethyl cellulose films were prepared using acetone-methanol (8:2), chloroform-methanol (8:2), dichloromethane-methanol (8:2) and ethyl acetate-methanol (8:2) as solvents and dibutyl phthalate (40% w/w) as a plasticizer. Solvent evaporation technique gave thin uniform films. Water vapour transmission and drug diffusion rate of films followed zero order kinetics. Drug release was governed by peppas model. Diffusion exponent of release profiles (slope) has a value of n>1, which indicates non analmous transport diffusion. Solvents showed significant influence on water vapour transmission, drug diffusion and permeability of films. Ethyl acetate:methanol (8:2) showed highest permeability when compared to other films. <br/> <br/>Page(s): 147-150 Tue, 29 Jan 2008 22:58:59 GMT