http://nopr.niscair.res.in/handle/123456789/9008 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/9558 Title: Crosslinked polyethylene <br/> <br/>Authors: Tamboli, S M; Mhaske, S T; Kale, D D <br/> <br/>Abstract: Properties of polyolefins can be modified by crosslinking process. Different methods of crosslinking and effect of process parameters, selection of crosslinking agents and applications are briefly discussed. <br/> <br/>Page(s): 853-864 http://nopr.niscair.res.in/handle/123456789/9557 Title: Enzymatic saccharification of cellulosic waste by cellulase system of <i style="">Cellulomonas uda</i> immobilized on tri(4-formyl phenoxy) cyanurate <br/> <br/>Authors: Khobragade, C N; Sureshkumar, K; Borkar, Prita S; Sagar, A D <br/> <br/>Abstract: Cellulose is one of the most abundant non-degradable organic compound on earth. Near about half of the municipal and agricultural solid wastes contain cellulose or their derivatives. Saccharification or enzymatic hydrolysis of cellulosic wastes liberates glucose. In the present work, cellulase from <i style="">Cellulomonas</i> <i style="">uda</i> was extracted, partially purified by dialysis and immobilized on an organic support namely tri(4-formyl phenoxy) cyanurate. Percentage saccharification of seven different cellulosic waste materials was studied using native and immobilized cellulase systems. Maximum saccharification for both native and immobilized cellulase was observed for sawmill dust or wood dust (4.9 and 2.4% respectively) as compared to other cellulosic waste substrates. <br/> <br/>Page(s): 816-819 http://nopr.niscair.res.in/handle/123456789/9556 Title: Dipole moment studies of H-bonded complexes of phenols and substituted phenols with benzaldehyde in tetrachloromethane <br/> <br/>Authors: Mahapatra, U S; Roy, G S; Maharana, L <br/> <br/>Abstract: The dipole moment of 1:1 hydrogen bonded complexes of phenols and substituted phenols with benzaldehyde were determined from dielectric measurements at a temperature of 308.16 K. The dipole moment of the complex (<img src='/image/spc_char/micro.gif' border=0>_ab), molar polarisation (<i style="">P</i>_ab), interaction dipole moment (<img src='/image/spc_char/delta.gif' border=0><img src='/image/spc_char/micro.gif' border=0>) for all the ternary systems were calculated for most favourable consideration predicted thermodynamically. The results indicate that complexation is predominantly due to polarization as well as electrostatic interaction. <br/> <br/>Page(s): 811-815 http://nopr.niscair.res.in/handle/123456789/9555 Title: Flotation-separation of nickel from aqueous media using some hydrazone derivatives as organic collectors and oleic acid as surfactant <br/> <br/>Authors: Ghazy, S E; Mostafa, H A; Farra, S A El; Fouda, A S <br/> <br/>Abstract: A simple and rapid procedure was developed for the quantitative flotation of nickel(II) from aqueous solutions. Hydrazone derivatives such as: 4-acetylpyridine-[N-(3-hydroxy-2-naphthoyl)]hydrazone (H₂APHNH), thiophene-2-carbox- aldehyde-[N-(3-hydroxy-2-naphthoyl)]hydrazone (H₂THNH), salicylaldehyde-[N-(3-hydroxy-2-naphthoyl)]-hydrazone (H₂SHNH), <i style="">p</i>-anisaldehyde-[N-(3-hydroxy-2-naphthoyl)]hydrazone (H₂-<i style="">p</i>-AHNH) and ethylacetoacetate-[N-(3-hydroxy-2-naphthoyl)]hydrazone (H₂EHNH) have been used as organic collectors and oleic acid as surfactant. The different parameters, affecting the flotation process, namely, ligand and surfactant concentrations, foreign ions (which are normally present in fresh and saline waters), pH and temperature are examined. Nearly 100% of nickel ions are floated at a metal:ligand ratio of 1:2, pH ~ 7 and at a temperature ~ 25ºC. The procedure is successfully applied to recover Ni(II) from some water samples. The flotation mechanism is suggested. <br/> <br/>Page(s): 787-792