University of Burdwan

About: University of Burdwan is a education organization based out in Barddhamān, West Bengal, India. It is known for research contribution in the topics: Population & Nanocrystalline material. The organization has 2492 authors who have published 5389 publications receiving 74865 citations. The organization is also known as: BU & Burdwan University.

Colorimetric and fluorimetric response of Schiff base molecules towards fluoride anion, solution test kit fabrication, logical interpretations and DFT-D3 study.

Abstract: Two newly synthesized Schiff base molecules are herein reported as anion sensors. –NO2 substituted receptor (P1) is comparatively more acidic and can sense F−, OAc− and H2PO4−, whereas –CN substituted receptor (P2) is less acidic and is selective for F− only. Reversible UV-Vis response for both receptors with F− can mimic multiple logic gate functions, and several complex electronic circuits based on XNOR, XOR, OR, AND, NOT and NOR logic operations with ‘Write–Read–Erase–Read’ options have been executed. Interesting ‘turn on and off’ fluorescence responses were noticed for the receptors with F−. Intracellular F− detection as a diagnosis of non-skeletal fluorosis was successful using a fluorescence microscope with Candida albicans (prokaryotic cell, a diploid fungus) and pollen grains of Tecoma stans (eukaryotic cell) incubated in 10−6 M fluoride-contaminated hand-pump water collected from Bankura, West Bengal, India. Furthermore, a solution test kit was fabricated for easy and selective detection of F− in an aqueous solvent.

Mixed Convection Flow along a Stretching Cylinder in a Thermally Stratified Medium

Abstract: An analysis for the axisymmetric laminar boundary layer mixed convection flow of a viscous and incompressible fluid towards a stretching cylinder immersed in a thermally stratified medium is presented in this paper. Similarity transformation is employed to convert the governing partial differential equations into highly nonlinear ordinary differential equations. Numerical solutions of these equations are obtained by a shooting method. It is found that the heat transfer rate at the surface is lower for flow in a thermally stratified medium compared to that of an unstratified medium. Moreover, both the skin friction coefficient and the heat transfer rate at the surface are larger for a cylinder compared to that for a flat plate.