http://nopr.niscair.res.in/handle/123456789/964 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/1187 Title: An empirical correlation in predicting the viscosity of refined vegetable oils <br/> <br/>Authors: Gupta, Anupama; Sharma, S K; Toor, Amrit Pal <br/> <br/>Abstract: Accurate knowledge of transport properties of oil is essential for mass and heat flow. Viscosity is one of the important properties of an oil which needs to be determined as it influences the ease of handling, transport and nature of storage. The effect of temperature on viscosity of six refined vegetable oils viz. palm oil, rice bran oil, cottonseed oil, mustard oil, sunflower oil and soybean oil has been studied. An empirical correlation between reduced viscosity and reduced temperature has been derived for the determination of viscosities of refined vegetable oils showing Arrhenius behaviour above 20°C (293 K). This correlation predicts the viscosity of refined vegetable oils at temperatures more than 40-60°C above 20°C (293 K). Consistency tests for viscosity data using reduced parameters have been reported. The viscosities calculated using proposed empirical correlation agree well with the reported experimental values. <br/> <br/>Page(s): 642-645 http://nopr.niscair.res.in/handle/123456789/1186 Title: Estimation of thermal conductivity of binary liquid mixtures employing new approach <br/> <br/>Authors: Pandey, J D; Dey, R; Soni, N K; Chandra, Prakash; Yadav, M K <br/> <br/>Abstract: Thermal conductivity of four binary liquid mixtures of polyethers with n-dodecane have been computed using a new approach. Decent agreement has been found between the experimental and estimated values of thermal conductivity for all systems. <br/> <br/>Page(s): 638-641 http://nopr.niscair.res.in/handle/123456789/1185 Title: Regeneration of carbonyl compounds from their oximes using Ce(IV) based phase-transfer oxidants <br/> <br/>Authors: Dewan, Anindita; Kakati, Dilip Kumar <br/> <br/>Abstract: Regeneration of ketone and aldehyde from their oximes is an important reaction in synthetic organic chemistry. In the oxidative deoximation processes the use of inorganic reagents is restricted by the insolubility of inorganic reagents in organic solvents. However this problem can be alleviated by the use of oxidants, like tetra-alkyl ammonium salts in the form of phase-transfer reagents. In the present case two phase transfer oxidants cetyldimethyl benzyl ammonium cerium nitrate (CDBACN) and cetyltrimethyl ammonium cerium nitrate (CTACN) were used for oxidative deoximation of oximes of carbonyl compounds. The regenerated carbonyl compounds were characterized from their melting points and spectroscopic analysis. <br/> <br/>Page(s): 635-637 http://nopr.niscair.res.in/handle/123456789/1184 Title: Studies on effect of growth factor on morphological, chemical and pulp and paper making characteristics and its impact on fluff generation <br/> <br/>Authors: Dutt, Dharm; Tyagi, C H; Malik, R S <br/> <br/>Abstract: The dearth of cellulosic fibers has compelled the paper technocrats to search for high yielding and fast growing trees. Leucaena leucocephala has solved the manifold purposes of both farmers as well as paper manufacturers. However, paper manufacturers face the serious problem of fluff in the drying section of paper machine with this furnish. L. leucocephala of the same species was cut after 2, 3 and 4 years and was analyzed for, morphological, chemical and pulp evaluation characteristics. The fibers of 2 and 3 years old of L. leucocephala are immature and consist of more non-fibrous elements i.e. vessels and parenchymatous cells. When such type of fibers are subjected to mechanical attrition for removal of primary wall, cause more fiber cuttings instead of fibrillation. The primary wall is permeable to water but does not participate in bond formation. These non-fibrous elements have larger surface area than fibers and their presence affects fiber bonding adversely. The loosely bonded fibers from the paper sheet adhere on press rolls or dryers during sheet making and contribute to fluff problem. L. leucocephala cut after 4 years of cultivation does not show fluff problem because of complete cellulose formation of fibers. <br/> <br/>Page(s): 626-634