Chandigarh University

About: Chandigarh University is a education organization based out in Mohali, India. It is known for research contribution in the topics: Materials science & Computer science. The organization has 1358 authors who have published 2104 publications receiving 10050 citations.

Phytochemical Screening, Metal-Binding Studies and Applications of Floral Extract of Sonchus oleraceus as a Corrosion Inhibitor

Abstract: Traditional medicines involve the use of different bioactive constituents present in medicinal plants. The present study was carried out on preliminary phytochemical screening, metal-binding capacity and applications of floral extract of Sonchus oleraceus plant as a corrosion inhibitor. The phytochemical screening of the S. oleraceus extract was carried out by performing different tests such as Mayer’s test, Wagner’s test, etc. The methanolic extract was tested for the presence of various phytochemicals and UV–Vis spectrum analysis was analysed to study metal-binding capacity of S. oleraceus with various metal chlorides. Further the corrosion inhibition effect of S. oleraceus extract for the mild steel was investigated using the weight reduction process. Weight reduction process clearly indicates that on increasing the concentration of the extract, the inhibition efficiency increases. The absorption spectroscopic techniques; UV–visible spectroscopy was used to propose a possible mechanism of the corrosion inhibition. Surface morphology of the mild steel surface was checked using scanning electron microscope.

A Highly Efficient Ag Nanoparticle-Immobilized Alginate-g-Polyacrylonitrile Hybrid Photocatalyst for the Degradation of Nitrophenols

Abstract: Herein, we report PAN-g-Alg@Ag-based nanocatalysts synthesis via in situ oxidative free-radical polymerization of acrylonitrile (AN) using Alg@Ag nanoparticles (Alg@Ag NPs). Various analytical techniques, including FTIR, XRD, SEM, TEM, UV–Vis, and DSC, were employed to determine bonding interactions and chemical characteristics of the nanocatalyst. The optimized response surface methodology coupled central composite design (RSM–CCD) reaction conditions were a 35-min irradiation time in a 70-mg L−1 2,4-dinitrophenol (DNP) solution at pH of 4.68. Here, DNP degradation was 99.46% at a desirability of 1.00. The pseudo-first-order rate constant (K1) values were 0.047, 0.050, 0.054, 0.056, 0.059, and 0.064 min−1 with associated half-life (t1/2) values of 14.74, 13.86, 12.84, 12.38, 11.74, 10.82, and 10.04 min that corresponded to DNP concentrations of 10, 20, 30, 40, 50, 60, and 70 mg L−1, respectively, in the presence of PAN-g-Alg@Ag (0.03 g). The results indicate that the reaction followed the pseudo-first-order kinetic model with an R2 value of 0.99. The combined absorption properties of PAN and Alg@Ag NPs on copolymerization on the surface contributed more charge density to surface plasmon resonance (SPR) in a way to degrade more and more molecules of DNP together with preventing the recombination of electron and hole pairs within the photocatalytic process.

A review paper on different multipliers based on their different performance parameters

Abstract: A processor consumes most of the hardware resources for multiplication process as compared to the other arithmetic operations such as addition and subtraction. Some of the most common parameters like speed, area, power consumption are controlled by topologies like array multiplier, modified booth multiplier, Wallace tree multiplier and modified Wallace tree multiplier. By using these parameters we enhance the system performance. It is thus required to use carry look ahead adder for decreasing the time and power. The parallel and pipeline concept are expected to enhance the performance of multipliers. This paper presents a detailed review by comparing different topologies of multipliers in recent years seeking the scope for the best possible optimization among speed, area and power consumption.

Structural and Functional Aspects of Ebola Virus Proteins.

Abstract: Ebola virus (EBOV), member of genus Ebolavirus, family Filoviridae, have a non-segmented, single-stranded RNA that contains seven genes: (a) nucleoprotein (NP), (b) viral protein 35 (VP35), (c) VP40, (d) glycoprotein (GP), (e) VP30, (f) VP24, and (g) RNA polymerase (L). All genes encode for one protein each except GP, producing three pre-proteins due to the transcriptional editing. These pre-proteins are translated into four products, namely: (a) soluble secreted glycoprotein (sGP), (b) Δ-peptide, (c) full-length transmembrane spike glycoprotein (GP), and (d) soluble small secreted glycoprotein (ssGP). Further, shed GP is released from infected cells due to cleavage of GP by tumor necrosis factor α-converting enzyme (TACE). This review presents a detailed discussion on various functional aspects of all EBOV proteins and their residues. An introduction to ebolaviruses and their life cycle is also provided for clarity of the available analysis. We believe that this review will help understand the roles played by different EBOV proteins in the pathogenesis of the disease. It will help in targeting significant protein residues for therapeutic and multi-protein/peptide vaccine development.

PDP, EIS, and Surface Studies of the Low-Carbon Steel by the Extract of Tinospora cordifolia: A Green Approach to the Corrosion Inhibition

Abstract: The influence of the Tinospora cordifolia extract on the low-carbon steel corrosion resistance in 0.5 M H2SO4 medium was investigated by using weight loss, potentiodynamic polarization, and electrochemical impedance spectroscopy measurements coupled with surface analysis; scanning electron microscopy (SEM) and atomic force microscopy (AFM). Potentiodynamic polarization showed that the T. cordifolia extract acts as a mix-type inhibitor and 87.18% effectiveness was observed at 500 mg/L inhibitor concentration. This extract displays significant corrosion hindrance at particular concentrations. It is determined that the inhibition effectiveness boosts up with a rise in the concentration of the T. cordifolia extract. The adsorption nature of the T. cordifolia extract follows the Langmuir’s isotherm. Finally, the SEM and AFM analyses confirm the protection offered by the T. cordifolia extract on the steel surface in aggressive media.