University of Rajasthan

About: University of Rajasthan is a education organization based out in Jaipur, India. It is known for research contribution in the topics: Chemical shift & Derivative (chemistry). The organization has 15058 authors who have published 15733 publications receiving 117400 citations. The organization is also known as: Rajasthan University.

Epigenetics: A key paradigm in reproductive health.

Abstract: It is well established that there is a heritable element of susceptibility to chronic human ailments, yet there is compelling evidence that some components of such heritability are transmitted through non-genetic factors. Due to the complexity of reproductive processes, identifying the inheritance patterns of these factors is not easy. But little doubt exists that besides the genomic backbone, a range of epigenetic cues affect our genetic programme. The inter-generational transmission of epigenetic marks is believed to operate via four principal means that dramatically differ in their information content: DNA methylation, histone modifications, microRNAs and nucleosome positioning. These epigenetic signatures influence the cellular machinery through positive and negative feedback mechanisms either alone or interactively. Understanding how these mechanisms work to activate or deactivate parts of our genetic programme not only on a day-to-day basis but also over generations is an important area of reproductive health research.

Toxicological effects, biological aspects and spectral characterization of organoboron(III) complexes of sulfonamide-imines

Abstract: The toxicological effects, biological aspects and spectral characterization of organoboron(III) complexes of sulfonamide-imines derived by the condensation of salicylaldehyde with different sulfa-drugs are described. The benzene-soluble, high-molecular-weight complexes have been characterized using a wide range of analytical and spectroscopic techniques, viz. UV, IR, 1H and 11B NMR. On the basis of these studies, it is inferred that the imines derived from sulfa drugs and salicylaldehyde behave as dibasic tridentate ligands and thus provide a tetrahedral environment around the boron atom. Finally, all these complexes have been screened for their antimicrobial activity against a variety of fungal and bacterial strains and their toxicological effects on male albino rats examined at the dosages employed. Copyright © 2004 John Wiley & Sons, Ltd.

Thermal Diffusion in Isotopic Gas Mixtures and Intermolecular Forces

Abstract: Available thermal diffusion data on He, Ne, Ar, Kr, Xe, ${\mathrm{H}}_{2}$, ${\mathrm{N}}_{2}$, ${\mathrm{O}}_{2}$, CO, C${\mathrm{H}}_{4}$, N${\mathrm{H}}_{3}$, HCl of different workers have been discussed. This study has revealed the need and nature of the additional measurements which will be useful and is thus of help in planning new experiments. The problems of temperature assignment and composition dependence of the thermal diffusion factor ${\ensuremath{\alpha}}_{T}$ are examined. The adequacy of the theoretical ${\ensuremath{\alpha}}_{T}$ expression used while interpreting the experimental results is also given proper consideration. Comparison of the experimental data are made with the prediction of the regorous Chapman-Enskog kinetic theory in conjunction with the three spherically symmetric potentials (Lennard-Jones 12-6, modified Buckingham exp-6, and Morse) for nonpolar gases, while a Stockmayer type 12-6-3 potential for polar gases. Reasonably satisfactory agreement is obtained even for polyatomic gases. The extent to which Chapman-Enskog theory in conjucntion with central force-field models may be expected to hold for polyatomic gases is investigated The up-to-date knowledge of the kinetic theory which takes into consideration inelastic molecular collisions is reviewed

Influence of heat source/sink on MHD flow between vertical alternate conducting walls with Hall effect

Abstract: The key object of this article is to present the impact of heat source/sink and Hall current on the completely advanced natural convection flow of a viscous incompressible and electrically conducting fluid through a vertical channel with the condition that one wall is conducting and other is non-conducting. The resulting system of non-dimensional linear equations has been examined with the help of theory of simultaneous differential equations. Finally, we have found the expressions for the fluid velocity, induced magnetic field and temperature field in the compact form. Also, we have derived the induced current density from induced magnetic field and with the help of velocity we found skin friction and rates of mass flow. The obtained results are presented through graphs for distinct values of the Hartmann number, Hall current and heat source/sink parameters. It is noted that the impact of the Hartmann number is to reduce the parts of the velocity and induced current density but improve the constituents of induced magnetic field. Further, the increase of the Hall current parameter leads to enhancement and reduces the primary and secondary constituents of the velocity and induced magnetic field respectively. The Hall current gives rise to a cross flow and the variable fluid properties have strong effects on the shear stress and the Nusselt number. Hall current is applicable in Hall accelerators, Hall effect sensors and constrictions of turbines, etc.