Jadavpur University

About: Jadavpur University is a education organization based out in Kolkata, India. It is known for research contribution in the topics: Population & Fuzzy logic. The organization has 10856 authors who have published 27678 publications receiving 422069 citations. The organization is also known as: JU & Jadabpur University.

Conversion of slaughterhouse and poultry farm animal fats and wastes to biodiesel: Parametric sensitivity and fuel quality assessment

Abstract: Over recent past, animal fat wastes have drawn significant attention for the production of biodiesel all around the globe. The present article provides a comprehensive review on the production of biodiesel from various slaughterhouse animal fats (SHAFs) waste resources viz. beef tallow, pork lard, mutton fat, lamb meat, fleshing oil as well as poultry fats (PFs) and wastes viz. chicken fat, duck tallow and feather meal. Methods of physical-pretreatment of SHAFs and PFs for recovering usable fat and subsequent chemical pre-treatment for reduction of free fatty acids have been enumerated. Biodiesel synthesis processes through both single and two-step trans/esterification employing homogeneous and heterogeneous catalytic routes have been critically assessed. Advantages of reusability of heterogeneous catalysts over their homogeneous counterparts have been elucidated. Besides, parametric effects viz. catalyst concentration, temperature, pressure and alcohol to fat ratios on biodiesel yield along with optimal process conditions have been meticulously presented. Relative merits and demerits of enzymatic and supercritical conversion processes have been highlighted. Current advancements in process intensification technologies have been assessed and comparative appraisals of biodiesel properties produced from various SHAFs and PFs have also been decisively summarized.

Performance Comparison of Differential Evolution, Particle Swarm Optimization and Genetic Algorithm in the Design of Circularly Polarized Microstrip Antennas

Abstract: Performance evaluation of evolutionary optimization techniques is done with respect to the design of circularly polarized microstrip antennas. The optimization techniques include conventional differential evolution, particle swarm optimization and genetic algorithm along with their advanced schemes. The optimization is done for impedance matching over a predefined frequency range, circular polarization, and high gain at a center frequency. The control parameters of all the algorithms are tuned using meta-level particle swarm optimization algorithm. Three cases are considered with three conventional feeding techniques, namely probe feed, transmission line feed, and the cross-aperture coupled feed. A fuzzified cost function is developed for optimization to ensure proper outcome from each optimization algorithm. The antenna parameters obtained from the algorithm producing best results are fabricated and their performances measured.

Photophysical studies of 7-hydroxy-4-methyl-8-(4′-methylpiperazin-1′-yl) methylcoumarin: A new fluorescent chemosensor for zinc and nickel ions in water

Abstract: The title compound, a new coumarin based fluorophore having a piperazine moiety as the photoinduced electron transfer (PET) switch was prepared and its photophysical properties studied in various solvents and under different pH. Solvatochromic shift in the fluorescence spectrum revealed an increase in the dipole moment in the lowest excited singlet state compared to that in the ground state. The compound also showed an interesting intramolecular photoinduced proton transfer phenomenon in the excited state under neutral pH. It was effectively utilized as a new Chelation-enhanced fluorescence (CHEF) based chemosensor for zinc and nickel ions in water.