Birla Institute of Technology, Mesra

About: Birla Institute of Technology, Mesra is a education organization based out in Ranchi, India. It is known for research contribution in the topics: Computer science & Dielectric. The organization has 2801 authors who have published 4789 publications receiving 52426 citations. The organization is also known as: BIT.

Dust events and their influence on aerosol optical properties over Jaipur in Northwestern India.

Abstract: In this study, we systematically document the link between dust episodes and local scale regional aero- sol optical properties over Jaipur located in the vicinity of Thar Desert in the northwestern state of Rajasthan. The seasonal variation of AOT500 nm (aerosol optical thickness) shows high values (0.51±0.18) during pre- monsoon (dust dominant) season while low values (0.36±0.14) are exhibited during winter. The Angstrom wavelengthexponent has beenfoundto exhibit low value (<0.25) indicating relative dominance of coarse-mode particles during pre-monsoon season. The AOT in- creased from 0.36 (Aprilmean) to 0.575 (May-Junemean). Consequently, volume concentration range increases from April through May-June followed by a sharp de- cline in July during the first active phase of the monsoon. Significantly high dust storms were observed over Jaipur as indicated by high values of single scattering albedo (SSA440 nm=0.89, SSA675 nm=0.95, SSA870 nm=0.97, SSA1,020 nm=0.976) than the previously reported values over IGP region sites. The larger SSA values (more scattering aerosol), especially at longer wavelengths, is due to the abundant dust loading, and is attributed to the measurement site's proximity to the Thar Desert. The mean and standard deviation in SSA and asymmetry parameter during pre-monsoon season over Jaipur is 0.938±0.023 and 0.712±0.017 at 675 nm wavelength, respectively. Back-trajectory air mass simulations sug- gest Thar Desert in northwestern India as the primary source of high aerosols dust loading over Jaipur region as well as contribution by long-range transport from the Arabian Peninsula and Middle East gulf regions, during pre-monsoon season.

Monoamine Oxidase Inhibitory Activity of Novel Pyrazoline Analogues: Curcumin Based Design and Synthesis.

Abstract: A series of new 2-methoxy-4-(5-phenyl-4,5-dihydro-1H-pyrazol-3-yl)phenolderivatives, 4-13, were synthesized and tested for their human MAO inhibitory activity. All the compounds were found to be selective and reversible toward hMAO-A except 4, a selective inhibitor of hMAO-B and 12, a nonselective inhibitor. Compound 7 was found to be a potent inhibitor of hMAO-A with Ki = 0.06 ± 0.003 μM and was having selectivity index of (SI = 1.02 × 10(-5)). It was found to be better than standard drug, Moclobemide (hMAO-A with Ki = 0.11 ± 0.01 μM) with selectivity index of SI = 0.049. Molecular docking simulation was carried out to understand the crucial interactions responsible for selectivity and potency.

Doping effect of carboxylic acid group functionalized multi-walled carbon nanotube on polyaniline

Abstract: The polyaniline–carboxylic acid functionalized multi-walled carbon nanotube (PANI–fMWCNT) nanocomposites have been successfully synthesized by in situ chemical oxidative polymerization of aniline using ammonium persulfate in the absence of any added acids. The surface functionalization of multi-walled carbon nanotube (fMWCNT) was performed in concentrated sulfuric and nitric acid mixture at 90 °C for 24 h. FTIR spectra indicate that the carboxylic acid groups were generated on the surface of the MWCNTs through oxidation in acid mixtures. The structure and morphology of the PANI–fMWCNT nanocomposites were characterized by UV–VIS, FTIR, XRD, SEM and TEM. The results of UV–VIS and FTIR confirmed that, the synthesized PANI–fMWCNT nanocomposites were in the doped state. The images of SEM and TEM showed a uniform dispersion of the carbon nanotubes in the PANI matrix. It was observed that the PANI–fMWCNT nanocomposites showed a higher conductivity in comparison to pure PANI and it was increased on increasing the concentration of fMWCNT in the nanocomposite with ⩽2 wt.% fMWCNT content. The highest average conductivity of 1.4 × 10−1 S/cm was recorded for the nanocomposite with 2 wt.% fMWCNT content, indicating best doping effect at lower concentration of fMWCNT. However, the conductivity decreased as fMWCNT content increased from 2 to 3 wt.%.

A re-appraisal on intensification of biogas production

Abstract: Biogas is said to be a clean and renewable form of energy. It can replace fossil fuel, thereby eliminating environmental concerns caused by them. Due to several constraints in the process of anaerobic digestion, the potential of this technology is not fully utilized. This paper reviews various techniques like co-digestion, pre-treatments, use of additives, variation in control parameters etc, which could be used to intensify the production of biogas.