http://nopr.niscair.res.in/handle/123456789/14626 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/14635 Title: Removal of some reactive dyes by untreated and pretreated <i>Saccharomyces cerevisiae, </i>an alcohol fermentation waste <br/> <br/>Authors: Bireller, E S; Aytar, P; Gedikli, S; Cabuk, A <br/> <br/>Abstract: This study presents <i>Saccharomyces cerevisiae</i>, an alcohol fermentation waste, for removal of acidic dyes (Red 3:1 & Orange 13) even after chemical and physical modification. Biosorption performance was found 96.29% through untreated biomass and 97.31% through pretreated biomass with hydrogen peroxide solution for Red 3:1, whereas 93.49% through untreated biomass and 94.71% through pretreated biomass with dimethyl sulfoxide and phosphoric acid solution for Orange 13. Good results were obtained when modified biomass was used to treat dye wastewater. FTIR analyses, before and after treatment, suggest that increase in dye adsorption was due to hydrolysis of yeast. Besides, Freundlich and Langmuir adsorption models were found suitable for biosorptions of both dyestuffs. <br/> <br/>Page(s): 632-639 http://nopr.niscair.res.in/handle/123456789/14634 Title: Effect of alkali treatment and fiber length on impact behavior of coir fiber reinforced epoxy composites <br/> <br/>Authors: Karthikeyan, A; Balamurugan, K <br/> <br/>Abstract: This study presents effect of fiber length and sodium hydroxide (NaOH) treatment on impact behavior of coir fiber composites. Coir fibers were treated with NaOH (conc. 2, 4, 6, 8 and 10%) for 10 days. For each group of coir, fiber length was 10, 20 and 30 mm. Coir fiber was used as a reinforcement and epoxy as a matrix to fabricate composites by hand lay-up technique. Alkali treated specimens showed an improvement in impact strength of 15% when compared with untreated fiber. <br/> <br/>Page(s): 627-631 http://nopr.niscair.res.in/handle/123456789/14633 Title: <span style="font-size:15.0pt;font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";mso-ansi-language:EN-IN;mso-fareast-language: EN-IN;mso-bidi-language:AR-SA">Optimization of power generation in a dual chambered aerated membrane microbial fuel cell with <i>E. coli </i>as biocatalyst</span> <br/> <br/>Authors: Masih, Sam A; Devasahayam, Mercy; Zimik, Masochon <br/> <br/>Abstract: This study presents power generation optimization in a dual chambered aerated membrane microbial fuel cell (MFC) with <i>E.coli </i>as biocatalyst at different culture densities (0.5 &amp; 1.0 OD) using sodium acetate as substrate. Optimum parameters werefound as follows: voltage, 783 mV; power density, 222.84 mW/cm²; and coulombic efficiency (CE), 86.56%. CE with sodium acetate as substrate was higher than with fermentable substrate. High CE indicates improved design of dual chambered mediator less aerated membrane MFC for electrical conductance with an application in water remediation. <br/> <br/>Page(s): 621-626 http://nopr.niscair.res.in/handle/123456789/14632 Title: Sequential cellulase production, saccharification and ethanol fermentation using rice straw <br/> <br/>Authors: Pasha, Chand; Sekhar, Banoth Chandra; Srinivas, Banoth; Balakrishna, Kannoju; Hanumalal, Nunavath <br/> <br/>Abstract: This study presents alkali pretreated rice straw for cellulase production using <i>Aspergillus niger </i>CP1 by solid state fermentation (SSF). On 8th day, 140±2.4 IU g/l dry substrate (ds) carboxy methyl cellulose CMCase), 15±1.2 IU g/l ds filter paper activity (FPA) and 24±1.1 IU g/l ds â-glucosidase activities were noted. On extraction of 120 g material with 1 l of 0.1 mol/l citrate buffer, 5.9±0.12 IU ml/l CMCase, 0.62±0.001 IU ml/l FPA and 1.11±0.002 IU/ml â-glucosidase were obtained. When extracted enzyme was used for saccharification of 120 g fresh pretreated rice straw containing 100 g holocellulose, 45±0.2 g, sugars (50 g/l) were released in 900 ml hydrolysate to give 45% hydrolysis. Hydrolysate after yeast fermentation gave 15.6±0.05 g/l ethanol with a yield of 0.4±0.011 g/l/h and 78% fermentation efficiency. In sequential enzyme production, saccharification and fermentation studies, on 8thday of cellulase production by SSF, temperature was shifted from 28±1°C to 55°C for 36 h, and 76% hydrolysis was achieved. When <i>A. niger </i>in hydrolysate was inactivated and used, 68±0.83 g/l ethanol and 92% fermentation efficiency were obtained. Hydrolysate used without inactivation of <i>A. niger </i>gave 61.65±0.78 g/l ethanol and 85% fermentation efficiency. <br/> <br/>Page(s): 616-620