Density, viscosity and speed of sound of binary liquid mixtures of sulpholane with aliphatic amines at <i style="">T </i>=308.15 K

576-581Experimental data on density, viscosity and speed of sound have been studied for the binary mixtures of sulpholane with diethylamine, n-propylamine, n-butylamine and tert-butylamine at 308.15 K. Excess molar volume, deviations in viscosity and isentropic compressibility have been computed from this data. The computed quantities have been fitted to the Redlich-Kister equation to derive the binary coefficients and to estimate the standard deviations. All mixtures show negative deviations for excess molar volume, deviations in viscosity and isentropic compressibility. The results have been interpreted on the basis of intermolecular interactions between unlike molecules

Volumetric and transport properties of binary liquid mixtures of aromatic hydrocarbons with N-methylacetamide at 308.15 K

511-516Experimental data on density, viscosity and speed of sound values at 308.15 K are presented for the binary mixtures of N-methylacetamide with benzene, toluene, mesitylene and phenylacetonitrile. From these experimental data, excess molar volumes, deviations in viscosity and isentropic compressibility of aromatic hydrocarbons with N-methylacetamide have been calculated. The computed values have been fitted to Redlich-Kister polynomial equation using multiparametric non-linear regression analysis to estimate the coefficients and standard errors. The variations in the calculated excess quantities for these mixtures have been studied in terms of molecular interactions between the component liquids and the effects of methyl and cyanomethylene substitution on benzene ring

Maternal Footprints of Southeast Asians in North India

We have analyzed 7,137 samples from 125 different caste, tribal and religious groups of India and 99 samples from three populations of Nepal for the length variation in the COII/tRNALys region of mtDNA. Samples showing length variation were subjected to detailed phylogenetic analysis based on HVS-I and informative coding region sequence variation. The overall frequencies of the 9-bp deletion and insertion variants in South Asia were 1.9 and 0.6%, respectively. We have also defined a novel deep-rooting haplogroup M43 and identified the rare haplogroup H14 in Indian populations carrying the 9-bp deletion by complete mtDNA sequencing. Moreover, we redefined haplogroup M6 and dissected it into two well-defined subclades. The presence of haplogroups F1 and B5a in Uttar Pradesh suggests minor maternal contribution from Southeast Asia to Northern India. The occurrence of haplogroup F1 in the Nepalese sample implies that Nepal might have served as a bridge for the flow of eastern lineages to India. The presence of R6 in the Nepalese, on the other hand, suggests that the gene flow between India and Nepal has been reciprocal