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Jalandhar, India

Kaith B.S.,National Institute of Technology Jalandhar | Jindal R.,National Institute of Technology Jalandhar | Kumar V.,CT Group of Institutions
Petroleum Science and Technology | Year: 2015

The adsorption of crude oil from aqueous solution was carried out using a Gum tragacanth-acrylic acid based hydrogel. The prepared hydrogel was characterized using TGA/DTA/DTG techniques. Effect of pH, contact time, acrylic acid, and glutaraldehyde concentration for the adsorption of oil from aqueous solution was measured. Maximum crude oil adsorption from synthesized hydrogel occurred at 40% of acrylic acid concentration. The results showed that in case of pH, maximum adsorption occurred at acidic pH followed by alkaline and neutral pH. Copyright © 2015 Taylor & Francis Group, LLC. Source

Sharma V.,Punjab Technical University | Sharma A.,CT Group of Institutions | Kaur D.,Punjab Technical University
Journal of Optical Communications | Year: 2015

In this paper, performance analysis of high-speed superdense wavelength-division-multiplexing (SDWDM) optical add-drop multiplexer (OADM) optical ring network for 6 nodes, 45 wavelengths having channel spacing of 0.2 nm on 300 km unidirectional nonlinear single-mode fiber ring of 10 Gbit/s has been reported. The performance optimization of the system by comparing different modulation formats has been reported on the basis of eye diagram and bit error rate (BER). It has been reported that CSRZ modulation format can achieve BER as better as e-24, which gives best performance. This paper also presents a study of performance degradation caused by the crosstalk and the effect of channel spacing on SWDM system. © 2015 by De Gruyter. Source

Shahab S.,National Academy of Sciences of Belarus | Almodarresiyeh H.A.,National Academy of Sciences of Belarus | Kumar R.,CT Group of Institutions | Darroudi M.,University of Mazandaran
Journal of Molecular Structure | Year: 2015

In this study, the structure and some molecular properties of a new substance sodium 4-[(4E)-4-[(2E)-2-(2-chloro-3-{(E)-2-[1-(4-sulfonatobutyl)quinolinium-4-yl]ethenyl}-2,3-dihydro-1H-inden-1-ylidene)ethylidene]quinolin-1(4H)-yl]butane-1-sulfonate (Q) with maximum absorption in near-IR region (λmax = 832 nm) was modeled using the Density Functional Theory method (DFT) and then synthesized. The electronic absorption spectrum of Q in dimethylformamide (DMF) solution was calculated. The UV, IR, and PMR spectra of Q were also presented. © 2015 Elsevier B.V. All rights reserved. Source

Kumar R.,National Institute of Technology Jalandhar | Kumar R.,CT Group of Institutions | Obrai S.,National Institute of Technology Jalandhar | Jassal A.K.,Guru Nanak Dev University | And 3 more authors.
Journal of Coordination Chemistry | Year: 2015

The present work consists of synthesis, structural characterization, spectral, density functional theory (DFT), antimicrobial, and anticancer studies of two copper(II) complexes, [Cu(THEEN)(DNB)] (DNB) (1) and [Cu(TEAH3)2](DNB)2(2). In these complexes, THEEN is N,N,N',N'-tetrakis(2-hydroxyethyl) ethylenediamine, a tetrapodal ligand, and TEAH3 is tris(2-hydroxyethyl)amine, a tripodal ligand, and the counter-anion is 3,5-dinitrobenzoate (DNB-). X-ray crystallography studies reveal that both complexes have distorted octahedron geometries. DFT studies have been performed to calculate structural parameters, vibrational bands, and energy gaps of frontier orbital (HOMOLUMO) with B3LYP/6-31G/LANL2DZ level of theory using DMSO as solvent. The theoretical and crystallographic analyses are consistent. Antimicrobial studies have been performed with new copper(II) complexes against Gram(+) bacteria (Staphylococcus aureus), Gram(-) bacteria (Serratia marcescens, Sphingobium japonicum, and Stenotrophomonas maltophilia) and fungal species (Candida albicans, Aspergillus niger, and Saccharomyces cerevisiae). The copper(II) complexes have also shown in vitro cytotoxicity on MCF-7, HCT-116, and HL-60 human cell lines. This study demonstrates that 2 was active against MCF-7 cell lines with IC50 of 23 μg/mL. © 2015 Taylor & Francis. Source

Mittal H.,University of Johannesburg | Mittal H.,South African Council for Scientific and Industrial Research | Kumar V.,CT Group of Institutions | Saruchi,National Institute of Technology Jalandhar | And 2 more authors.
International Journal of Biological Macromolecules | Year: 2016

This research paper reports the utilization of gum xanthan-grafted-polyacrylic acid and Fe3O4 magnetic nanoparticles based nanocomposite hydrogel (NCH) for the highly effective adsorption of methyl violet (MV) from aqueous solution. Synthesized NCH was characterized using various techniques, such as FTIR, XRD, SEM-EDS, TEM and BET. Adsorption behavior of NCH was studied for the adsorption of MV and it was found to remove 99% dye from the solution. Adsorption process followed Langmuir isotherm model (qe = 642 mg/g) and pseudo-second-order kinetics model. Thermodynamic studies suggested that the adsorption process was endothermic and spontaneous. Moreover, the adsorbent was successfully utilized for successive five cycles of adsorption-desorption. © 2016 Elsevier B.V. Source

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