http://nopr.niscair.res.in/handle/123456789/4984 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/5386 Title: Spectroscopic and ion exchange studies on modified cotton linters <br/> <br/>Authors: Nada, A M A; Hamed, S S; Soliman, S I; Mongy, S Abd El <br/> <br/>Abstract: Cation exchange resin was prepared by phosphorylation of cotton linters. The effect of different treatments (alkali or acid) of cotton linters on phosphorylation process was studied. This treatment increases the efficiency of the produced resin toward metal ions uptake (Cu, Fe, Mn, Ni, Pb, Zn). The effect of pH value of metal ion solution on the efficiency of ion exchanger was investigated. The efficiency of the resin toward metal ion uptake was affected by soaking time and weight of resin. Infrared spectroscopy of the cotton linters and its modification was investigated. A new band was seen at wave number 980 cm^-1 and 1194 cm^-1 due to the C-O-P band. <br/> <br/>Page(s): 1003-1009 http://nopr.niscair.res.in/handle/123456789/5383 Title: Use of copper slag as construction material in bituminous pavements <br/> <br/>Authors: Pundhir, N K S; Kamaraj, C; Nanda, P K <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> Copper Slag (CS) is produced as waste from roasting of copper, in which sulphur (as SO₂) is eliminated. CS was used as fine aggregate (up to 30%) in the design of bituminous mixes like Bituminous Macadam, Dense Bituminous Macadam, Bituminous Concrete and Semi-Dense Bituminous Concrete. Mechanical properties of mix such as Marshall stability, Indirect Tensile Strength was determined. Addition of CS as fine aggregate in various bituminous mixes provides good interlocking and eventually improves volumetric and mechanical properties of bituminous mixes. </smarttagtype></smarttagtype> <br/> <br/>Page(s): 997-1002 http://nopr.niscair.res.in/handle/123456789/5380 Title: Polymer-stearic acid blends as form-stable phase change material for thermal energy storage <br/> <br/>Authors: Sari, Ahmet; Akcay, Murat; Soylak, Mustafa; Onal, Adem <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"> This paper determines thermal properties of blends of polyvinyl alcohol (PVA)-stearic acid (SA) and polyvinyl chloride (PVC)-stearic acid (SA) as form-stable phase change material (PCM) for thermal energy storage (TES). In the blends, SA has a function of storing latent heat of fusion during its solid-liquid phase change when the polymer (PVC or PVA) as a supporting material prevents melted SA leakage because of its structural strength. Therefore, such blend is form-stable and can be used as PCM without encapsulation for passive solar TES applications. The maximum amount of SA in both composites found as high as 50 wt% without any seepage of SA in melted state. The dispersion of SA into the network of solid polymer matrix was investigated using an optical microscope (OM). The miscibility of SA with PVA and PVC were proved by Fourier Transfer Infrared (FT-IR) Spectroscopy method. Furthermore, melting temperatures of SA in PVA-SA and PVC-SA blends with form-stable mass combination (50 wt% polymer-50 wt% SA) and the total latent heats of fusion of the blends were found as 67.4°C and 64.7°C, and 132.68 and 129.34 J/g, respectively by Differential Scanning Calorimetry (DSC). Polymer-stearic acid blends as form-stable composite PCM were found to have great potential for especially solar space and building heating applications in terms of their satisfactory thermal properties and cost-effectivity. </smarttagtype> <br/> <br/>Page(s): 991-996 http://nopr.niscair.res.in/handle/123456789/5377 Title: Multiple parameter optimization for the maximization of hydrogen production by <i style="">Enterobacter cloacae </i>DM11 <br/> <br/>Authors: Sen, Debjeet; Das, Debabrata <br/> <br/>Abstract: The study deals with the optimization of multiple operational parameters to maximize H₂ production using <i style="">Enterobacter cloacae </i>DM11 grown on MYG (malt extract-yeast extract-glucose) medium in a batch system. A three-factorBox-Behnken factorial design followed by regression analysis and study of contour plots was employed for experimental design and analysis of results. Independent variables (process parameters) were: Inoculum age (5, 10 and 15 h); Initial glucose concentration in growth medium (0.8, 1.0 and 1.2 % w/v); and Initial pH of the growth medium (4, 6 and 8). Dependent variable was amount of H₂ (in millimoles) produced in 10 h. Optimum values for inoculum age, initial glucose concentration and initial pH were found to be 12.96 h, 1.06 % (w/v) and 6.06, respectively. <br/> <br/>Page(s): 984-990