P A College of Engineering

About: P A College of Engineering is a based out in . It is known for research contribution in the topics: Dihedral angle & Ring (chemistry). The organization has 298 authors who have published 594 publications receiving 4888 citations.

Combined Effect of Synthesized Waste Milk Scum Oil Methyl Ester and Ethanol Fuel Blend on the Diesel Engine Characteristics

Abstract: Milk scum is a waste obtained in milk dairies, which can be used as a raw material for producing biodiesel by a transesterification process In this research study, the biodiesel obtained from milk scum was blended with diesel to make binary blends (B20D80, B60D40 and B100) These binary blends were further blended with ethanol in different percentages to make ternary blends (B20E05D75, B20E10D70, B20E15D65) Physical and chemical properties of binary and ternary blends were investigated and compared Degradation of physical properties of the prepared biodiesels with respect to time was studied, which is the salient part of the work Engine performance test was conducted in a single-cylinder diesel engine Performance of the engine for different blends (both binary and ternary) was recorded and compared Addition of 5% ethanol showed a decrease in fuel consumption, whereas higher content (15%) of ethanol showed rapid increase in fuel consumption as compared to that of binary blends Ternary blend containing 5% ethanol showed higher brake thermal efficiency (BTE) compared to D100 (diesel only), while ternary blends containing 10 and 15% ethanol gave lower BTE compared to 5% ethanol and D100 The blend B20E05D75 is considered as better alternative fuel upon comparing mass fuel consumption, air fuel ratio and brake thermal efficiency with all rest of blends tested in this study

Synthesis, characterization and antimicrobial studies of a few novel thiazole derivatives

Abstract: A series of novel N-[4-(substituted)-1,3-thiazol-2-yl]-2-(substituted)acetamide (9a–m) and methyl 2-(2-(2-(substituted)acetamido)thiazol-4-yl)acetate (9n–o) derivatives have been synthesized and compounds were characterised by spectral and analytical studies. All compounds were screened for their in vitro antibacterial activity against Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Klebsiella pneumonia by disc diffusion method and for antifungal activity against Penicillium marneffei, Trichophyton mentagrophytes, Aspergillus flavus and Aspergillus fumigatus by serial plate dilution method. Compounds 9b, 9e, 9m and 9o exhibited growth inhibition against all the tested bacterial strains, with MIC values varying from 12.5 to 6.25 μg/ml. Among the compounds tested for antifungal activity, 9a, 9b, 9d, 9j, 9k, 9p and 9n showed wide range of activity against all the tested strains. Most of the newly synthesized compounds were effective against fungal strains rather than bacterial strains. However, some of the compounds like 9a, 9e, 9j, 9k and 9i showed selective sensitivity against some of the bacterial strains whereas they were unable to sustain the growth of other strains.

Heat and Mass Transfer of a Casson Nanofluid Flow Over a Porous Surface With Dissipation, Radiation, and Chemical Reaction

Abstract: Casson nanofluid flow with dissipation, radiation, and chemical reaction in the presence of a temperature gradient dependent heat sink subject to suction is analyzed. Hence, this paper mainly deals nanofluids with nanoparticles Cu, Au, Ag, Al, Al2O3, and TiO2 and with base fluid water. Prescribed surface temperature and concentration boundary conditions are employed on the porous surface. Suitable similarity transformations are introduced for converting nonlinear partial differential equations into the nonlinear ordinary differential equations and then solved by analytically. The influence of various physical parameters such as the nanoparticle volume fraction, Casson fluid parameter, suction parameter, permeability parameter, heat sink parameter, Prandtl number, Eckert number, radiation parameter, Schmidt number, and chemical reaction parameter over the velocity, temperature, and species concentration of nanofluid Cu-water is examined by using graphs. Skin friction coefficient, Nusselt number, and Sherwood number of various nanofluids with nanoparticles (Cu, Ag, Au, Al, Al2O3, and TiO2) are tabulated and analyzed.

2,5-Bis(3,4-dimethoxybenzylidene)cyclopentanone

Abstract: The title compound, C23H24O5, a bis(3,4-dimethoxyphenyl)cyclopentanone derivative related to curcumin, shows noncrystallographic C-2v symmetry with two noncrystallographic mirror planes intersecting the cyclopentanone ring, resulting in a noncrystallographic twofold axis along the C = O double bond. The molecule is basically planar, the angles between the planes of the cyclopentanone ring and those of the two benzene rings being 2.5 (3) and 1.2 (7)degrees. The dihedral angles of both methoxy groups with the benzene rings are nearly identical 179.05 (11), 177.88 (11), -172.51 (12) and 176.11 (13)degrees]. The two 3,4-dimethoxyphenyl groups also lie within the plane of the molecule and the angle between them is 1.4 (1)degrees. The crystal packing is stabilized by intermolecular C-H center dot center dot center dot O hydrogen bonds.

Effect of homogenization speed and time on the recovery of alkaline phosphatase from the hepatopancreatic tissues of shrimps

Abstract: Hepatopancreatic tissues of shrimps were homogenized at various pestle speed and time intervals at a constant jerk of 15 passes/min on a narrow space using 0.1 M Tris-HCl buffer of pH 8.4 at 4°C. Release of proteins and alkaline phosphatase were determined by estimating the quantity of protein and alkaline phosphatase activity in each homogenate at the end of the experiments. Optimum condition for the homogenization of the hepatopancreatic cells was achieved at operating speeds of 3,000 rpm for 10 min in the homogenizer. Increase in pestle speed beyond 3,000 rpm for 10 min have no effect on the release of protein. Increasing the disruption speed above 3,000 rpm decreases the specific activity of alkaline phosphatase release, while extending the time of homogenization beyond 10 min at 3,000 rpm or the speed of pestle beyond 3,000 rpm for 10 min caused shear damage to the enzyme.