http://nopr.niscair.res.in/handle/123456789/11595 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/11648 Title: A simplified mix proportioning for cement based composites with crushed tile waste aggregate <br/> <br/>Authors: Nataraja, M C; Das, Lelin <br/> <br/>Abstract: This study presents a procedure to proportion concrete mixes with tile waste as coarse aggregate. To arrive at water –cement ratio for matrix strength, generalized Abrams’ law is employed for proportioning and proper utilization of industrial wastes based on their engineering properties leading to the production of quality concrete through mix design. This also serves as a method for disposal of industrial tile waste through proper technology management. <br/> <br/>Page(s): 385-390 Thu, 28 Apr 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11647 Title: Novel method of wind energy conversion system by incorporating permanent magnet generator and single stage AC-AC power converter <br/> <br/>Authors: Bharanikumar, R; Kumar, A Nirmal <br/> <br/>Abstract: This study proposed a cost effective method of wind energy conversion system (WECS) incorporating permanent magnet generator (PMG) and single stage power converter. Axial flux PMG can generate rated voltage and frequency even at a lower speed and hence more suitable for direct drive WECS. To get desired voltage and frequency in continuously varying wind conditions, a new type of WECS with single stage power conversion is being proposed. Matrix converter in the system is mainly used to control output voltage and frequency. It also reduces size of the system and cost of power generation. <br/> <br/>Page(s): 379-384 Thu, 28 Apr 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11646 Title: Kinetics studies of product inhibition in alcoholic fermentation <br/> <br/>Authors: Singh, Nand Lal; Prasad, Ram; Mishra, P K; Srivastava, Pradeep <br/> <br/>Abstract: This paper presents inhibitory effect of ethanol on growth of cells and ethanol production. A linear fall was observed of survival (%) of <i>Kluyveromyces Thermotolerans </i>cells with time. Change in death rate constant of cells beyond certain range of ethanol concentration was due to shift in mechanism of cells inhibition. Pronounced inhibitory effect was observed at higher ethanol concentrations in broth. Decrease in optimum temperature for growth of cells was found with added ethanol concentration. This also confirms more inhibitory effect of product on microorganism at higher temperature. This study confirms both reversible and irreversible inhibition of cells by ethanol. <br/> <br/>Page(s): 373-378 Thu, 28 Apr 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11645 Title: Some physicochemical analyses of kefir produced under different fermentation conditions <br/> <br/>Authors: Ismaiel, Ahmed A; Ghaly, Mohamed F; El-Naggar, Ayman K <br/> <br/>Abstract: This study presents physicochemical attributes of kefir under different cultural conditions. Maximum values of kefirbiomass and kefiran were achieved when 100 ml of skimmed cows’ milk (pH 6)/250 ml glass container was fermented with 5 gfresh kefir grains after stationary incubation at 30°C for 120 h. Amino acids profile in kefir included most types of amino acidsexcept asparagine, glutamine and tryptophan. Analysis of kefir organic acids indicated that lactic acid had highest concentration(7.30 mg/ml), followed by acetic acid (6.50 mg/ml) and maleic acid (4.00 mg/ml). Production of ethanol was high, reaching aconcentration value of 0.22% (w/w). Highest kefir biomass and kefiran concentration were maintained when fermentation processwas carried out using a medium formulation composed of: lactose, 40; ammonium chloride, 4.0; KH₂PO₄, 1.0 and MgSO₄.7H₂O,5.0 g/l. Physicochemical analyses of kefir resulted from fermentation of either skimmed milk or medium formulation indicated thatboth kefiran production and kefir filtrate viscosity were growth associated, while increase in titratable acidity was largely relatedto lactic acid production. <br/> <br/>Page(s): 365-372 Thu, 28 Apr 2011 22:58:59 GMT