Issue 5

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Alok Tiwari, Brijesh Pandey, Raghvendra Mishra, Ajay Vasudeo Rane and Jaya Suryawanshi. 2016. Synthesis of samarium (Sm) doped thin film of SrMnO3 by pulse laser deposition and its structural and magnetic characterization. Current Science Perspectives 2(1) 1-4

Abstract

The present paper is a theoretical and experimental analysis of thin film synthesis by pulse laser deposition and its different characterization, in which, thin film of Sm0.5Sr0.5MnO3 has been synthesized by Pulse laser deposition (PLD) technique. Stoichiometric amounts of Sm2O3, SrCO3 and MnO2 were thoroughly mixed and grinded together, the resulting mixture were reground, pressed into pellets and then deposited on to the different STO plates. Then Structural and magnetic properties of thin film read by different characterization technique. Thin films of Sm0.5Sr0.5MnO3, single layered were characterized by XRD, RSM, and VSM. After the study of its structural characterization we have found that the resulting phase of material is pure. VSM were used for measuring magnetic properties of the films.

 

Fatma Hussain, Muhammad Shahid and Komal Javed. 2016. Antioxidant, antiglycation and alpha Amylase inhibitory activities of Cassia absus seeds. Current Science Perspectives 2(1) 5-9

Abstract

Being the natural reservoirs of metabolites, plants are the mainstay of health care system since antiquity and are potent in neutralizing free radicals and thus ameliorate certain degenerative diseases like diabetes mellitus. Present research was planned to assess antioxidant, antiglycation and enzyme inhibitory activities of Cassia Absus seeds (CAS). Cassia Absus seeds extract and solvent fractions were subjected to DPPH free radical scavenging assay, and phytochemical screening. In addition, antiglycation and alpha amylase inhibition potentials were evaluated by prescribed protocols. Antioxidant activity ranged from 49.8 to 74.2% and CAS n-hexane fraction had significantly highest scavenging activity. DPPH scavenging activity in descending order was n-hexane > n-butanol > ethylacetate >chloroform > aqueous methanol. Significant (P < 0.05) antiglycation activities were time-dependent. After first week incubations, 16.2-44.5% decline in glycation was observed and methanol aqueous extract was the strongest inhibitor. Three weeks glycation study further blocked BSA glycation by 24.2-60.21% and n-butanol fraction had most dominant antiglycation potency. CAS extract/fractions showed concentration-dependent amylase inhibitory effect. With 0.1 mL concentrations, 12.5-27.43% decline in enzyme activity was observed that progressed to 58.65-70.23% by 0.5 mL test sample. Most effectual in enzyme inhibition was n-butanol fraction. Other samples (0.5 mL) reduced amylase activity in descending order as n-hexane > chloroform> aqueous > ethylacetate. Screening showed that alkaloids, flavonoids, terpenoids, glycosides and tannins were present. The data offers some valuable bioactivities of Cassia absus seeds. CAS may be considered as a potential source of biological agents for developing different pharmaceutical applications.

 

 

Alok Tiwari, Brijesh Pandey, Abitha V. K, Raghvendra Mishra, Amit Vasudeo Raneand Jaya Suryawanshi. 2016. Simulation of ultra-wideband co-planar boat microstrip patch antenna with IE3D software for wireless communication. Current Science Perspectives 1(2) 10-13

Abstract

The aim of the project is to design and fabricate a dual frequency and dual polarized microstrip patch antenna through simulations and measurements. On a thin substrate this antenna achieves in the range of 5.8–12.9 GHz an impedance bandwidth of almost 75%.A new antenna structure using triangular microstrip patch antenna alongside a small trapezoidal shape ground plane with proximity fed by a microstrip line is proposed in this paper. This printed antenna structure resembles a boat hence it is called boat microstrip patch antenna. The boat MPA is used for ultra-wide bandwidth intelligent antenna systems application. This antenna was numerically designed using HFSS simulation software package. The final proposed antenna design provides an impedance bandwidth (S11 < ¡10 dB) in therange from 2 GHz to up 35 GHz with a lot of bandwidth discontinuity. Etching 2D electromagnetic and-gap structure (2D-EBG), as dumb-bell shape in line feed increased the bandwidth to three times than the original bandwidth and reduced antenna size as well as enhancing the antennagain.