Chaudhary Devilal University

Sirsa, India

Chaudhary Devilal University

Sirsa, India
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Mann N.,Chaudhary Devilal University | Kumar A.,National Institute of Technology Kurukshetra | Kumar S.,Chaudhary Devilal University | Chauhan R.P.,National Institute of Technology Kurukshetra
Radiation Protection Dosimetry | Year: 2016

Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and their daughters contributes more than 50 % of the total dose from natural sources. One of the important parameters to find out the contribution of soil and building materials towards indoor radon is radon exhalation rates, which can be used for estimation of indoor radon levels. The indoor radon and thoron levels from the air and radon exhalation rates from soil samples collected from two districts (Hisar and Fatehabad) of Western Haryana are measured using pin-hole-based radon-thoron dosimeter and LR-115 solid-state nuclear track detector by canister technique. The results show that the indoor radon and thoron levels from Hisar district varied from 11 to 112 and 11 to 80 Bq m-3, while for Fatehabad district from 5 to 24 and 59 to 105 Bq m-3, respectively, in summer season. In winter season, indoor radon and thoron levels from Hisar district varied from 15 to 43 and 32 to 102 Bq m-3, while for Fatehabad district from 18 to 31 and 11 to 80 Bq m-3, respectively. The indoor radon levels of 95 % locations lie well below the limit recommended by International Commission of Radiation Protection, 2011. The radon mass exhalation rate varied from 6 to 56 mBq kg-1 h-1. The radon mass exhalation rates from the soil samples were lower than the worldwide average, i.e. 56 mBq kg-1 h-1. There exists a poor correlation between indoor radon and exhalation rates. More investigations of measurement of radionuclide contents from rock and stone of study area can improve the understanding. © The Author 2016. Published by Oxford University Press. All rights reserved.


Kumar S.,Chaudhary Devilal University | Chakarvarti S.K.,Manav Rachna International University
AIP Conference Proceedings | Year: 2011

Copper nanowires have been synthesized successfully using template assisted electrodeposition technique. Commercial polycarbonate membrane (Whatman, Japan) having pore diameter 100 nm, thickness 10 μm and pore density 107 pores/cm2 was used as template. Scanning electron microscopy and X-ray diffraction techniques were used to characterize the synthesized copper nanowires. XRD and SEM results reveal that polycrystalline copper nanowires were obtained with fcc lattice structure having diameter equal to the diameter of the template used. © 2011 American Institute of Physics.


Bharti V.,Sudan University of Science and Technology | Vasudeva N.,Sudan University of Science and Technology | Dhuhan J.S.,Chaudhary Devilal University
Advanced Pharmaceutical Bulletin | Year: 2013

Purpose: The study is aimed at finding new antibiotic therapy for aquaculture due to potential of bacteria to develop resistance to the existing therapies. Use of large quantities of synthetic antibiotics in aquaculture thus has the potential to be detrimental to fish health, to the environment and wildlife and to human health. Methods: Antimicrobial potential of volatile oil and fractions of chloroform extract of Oreganum vulgare was evaluated alone and in the presence of standard antimicrobials against common fish pathogens by disc-diffusion, agar well assay and two fold microdilution method by nanodrop spectrophotometric method. Results: The best results were represented by volatile oil followed by phenolic fraction by disc-diffusion, agar well and microdilution assays (Minimum inhibitory concentration). By the interaction studies, it was observed that the volatile oil and phenolic fraction were able to inhibit the pathogens at very low concentration compared to standard drugs. The fractional inhibitory concentration index (FICI) was calculated and volatile oil and phenolic fractions were found to be synergistic against Pseudomonas fluorescens and Candida albicans. Conclusion: The experimental data suggests the use of volatile oil and phenolic fraction in combination with standard antimicrobials to maintain healthy aquaculture with lesser adverse effects as compared to synthetic antibiotic therapy. © 2013 by Tabriz University of Medical Sciences.


Sangwan P.,GDC Memorial College | Kumar H.,Chaudhary Devilal University
Asian Journal of Pharmaceutical and Clinical Research | Year: 2017

Objective: This paper consists of synthesis of chromium oxide (Cr2O3) nanoparticles by sol-gel technique, their characterization and investigation of antibacterial activity of these nanoparticles against pathogenic bacteria by measuring zone of inhibition, colony forming units, and optical density (OD) on solid agar media as well as in liquid medium. Methods: The Cr2O3 nanoparticles were synthesized by sol-gel technique using tetraethylorthosilicate as precursor. The synthesized Cr2O3 nanoparticles were characterized by X-ray diffraction (XRD), Fourier-transform infrared spectroscopy, ultraviolet-visible spectroscopy, and transmission electron microscopy (TEM) techniques. The antibacterial effect of these Cr2O3 nanoparticles against Klebsiella pneumoniae was investigated both on the solid agar plates and in liquid medium supplemented with different concentrations of Cr2O3 nanoparticles. The antibacterial activity of Cr2O3 nanoparticles was also compared with the antibacterial activities of the standard antibiotics such as ampicillin, chloramphenicol, penicillin G, streptomycin, sulphatriad, and tetracycline which were taken in the form of hexa discs. Results: Average particle size of the Cr2O3 nanoparticles was found to be 24.0 nm. It was observed that K. pneumoniae is resistant to the penicillin G and ampicillin, but Cr2O3 nanoparticles show good antibacterial property. The minimum inhibitory concentration of Cr2O3 for K. pneumoniae is 2.5 mg/ml. The bacterial growth was monitored by measuring zone of Inhibition, colony formation unit, and OD method. Conclusion: Sol-gel technique is a convenient and easy technique for the synthesis of metal nanoparticles. Nanosized Cr2O3 particles showed an effective antibacterial activity against K. pneumoniae. Therefore, Cr2O3 nanoparticles due to its low manufacturing cost and high effectiveness in antimicrobial properties may find wide applications in various industries to address safety issues. © 2017 The Authors.


Singh M.,Amity University | Singh M.,Guru Jambheshwar University of Science and Technology | Pal Singh V.,Singhania University | Sangwan A.,D. C. R. University of Science and Technology | And 2 more authors.
Journal of Nonlinear Optical Physics and Materials | Year: 2014

By considering the hydrodynamic model of semiconductor-plasmas, an analytical investigation is performed to study the influence of Szigeti effective charge (qs) on coherent Raman scattering (CRS) of laser radiation in a transversely magnetized direct gap semiconductor arising from electron density perturbations and molecular vibrations of the medium both produced at the transverse optical phonon frequency. Assuming that the origin of CRS lies in the third-order susceptibility of the medium, an expression is obtained for Raman gain coefficient (gR). Numerical estimates are made for a representative n-type InSb crystal duly shined by pulsed 10.6 μm CO2 laser. The threshold field (E0th) for inciting CRS is identified. The dependence of gR on pump field strength E 0, externally applied magnetic field (in terms of electron cyclotron frequency ωc) and doping concentration (in terms of plasma frequency ωp) is reported for both cases viz., qs = 0 and qs ≠ 0. In absence of qs, the results are found to be well in agreement with available literature. © 2014 World Scientific Publishing Company.


Sanghi S.,Guru Jambheshwar University of Science and Technology | Duhan S.,Chaudhary Devilal University | Agarwal A.,Guru Jambheshwar University of Science and Technology | Aghamkar P.,Chaudhary Devilal University
Physica B: Condensed Matter | Year: 2010

Iron calcium bismuthate glasses having composition 0.05Fe2O 3·0.95{xCaO·(100-x)Bi2O3} (x=30, 35 and 40 mol%) were prepared using normal melt quench technique. Complex impedance spectra of these glasses have been recorded in the temperature range 523633 K and in the frequency range 20 Hz1 MHz. The complex impedance data have been analyzed using the conductivity as well as electric modulus formalisms. The dc conductivity increases and activation energy decreases when CaO content increases. The modification of the glass network, due to the increase in CaO content, is responsible for the increase in conductivity. The frequency dependence of ac conductivity is found to obey the Jonscher power law. At low frequencies, dispersion was investigated in terms of dielectric loss. Significant changes in the values of the non exponential parameter (β) and the power law exponent (s) of the ac electrical properties have been observed as a function of CaO in the present glasses. A single 'master curve' for the normalized plots of all the modulus isotherms observed for a given composition indicates that the conductivity relaxation is temperature independent. The overlapping of the normalized peaks corresponding to impedance (Z″) and electric modulus (M″) suggests the same thermal activation energy for conduction and relaxation, which further suggests a single mechanism for the dynamic processes in the present glasses. © 2010 Elsevier B.V. All rights reserved.


Kumar R.,Kurukshetra University | Meglani A.,Chaudhary Devilal University | Garg S.,P.A. College
Materials Physics and Mechanics | Year: 2013

The present study is concerned with the reflection and transmission of plane waves at an imperfect interface between two different fluid saturated porous half spaces. The expression for the reflection and transmission coefficients which are the ratios of the amplitude of reflected and transmitted waves to the amplitude of incident waves are obtained for an imperfect boundary and deduced for normal stiffness, transverse stiffness. The variations of amplitude ratios with angle of incidence are depicted graphically. A particular case of reflection at the free surface in fluid saturated porous half spaces has been deduced and discussed. A special case of interest has also been deduced from the present investigation. It is found that amplitude ratios of the reflected and transmitted waves are affected by the stiffness of the media. © 2013, Institute of Problems of Mechanical Engineering.


Bharti V.,Sudan University of Science and Technology | Vasudeva N.,Sudan University of Science and Technology | Duhan J.S.,Chaudhary Devilal University
International Food Research Journal | Year: 2013

The use of food preservatives to prevent spoilage of the product during transportation and shelf life by food manufacturers is common. Artificial preservatives added may prevent the food but they may be carcinogenic and may harm the consumer's health. In food producing animals also, due to misuse of antimicrobials, antibiotic resistance have been developed which is affecting food industry. The present study was done to find out Oreganum vulgare, the most common food herb's antimicrobial potential against food poisoning organisms. The volatile oil was analysed by GC-MS and chloroform extract was fractionated into phenolic and non-phenolic part. The fractions and volatile oil were used alone and in combination with standard antimicrobials to evaluate the interaction effect. Volatile oil consisted of mainly Carvacrol (86.5%), {Thorn}-cymene (7.2%) followed by bornyl acetate. The Minimum Inhibitory Concentration (MIC) was found to be lowest for volatile oil followed by phenolic fraction when used alone and both in combination against Shigella flexneri, Aspergillus flavus and Salmonella enterica ser. Typhi. Synergism was shown by volatile oil with a FICI of 0.265, 0.187, 0.280 when combined with ciprofloxacin and fluconazole respectively against Shigella flexneri, Salmonella enterica ser. Typhi and Aspergillus flavus. Obtained data suggest the potential use of volatile oil and phenolic fraction of chloroform extract as along with standard antimicrobials as more effective combination with lesser side effects. The demonstrated antimicrobial activity of phenolic fraction and volatile oil when used alone suggests their use in food industry as preservatives without any toxicity. The interaction studies data with standard antimicrobials indicates the use of these combinations to infected food producing animals and humans; hence may solve the problem of antibiotic resistance in future. © 2008 IFRJ.


PubMed | National Institute of Technology Kurukshetra and Chaudhary Devilal University
Type: Journal Article | Journal: Radiation protection dosimetry | Year: 2016

Measurement of indoor radon and thoron is important because the inhalation of radon-thoron and their daughters contributes more than 50 % of the total dose from natural sources. One of the important parameters to find out the contribution of soil and building materials towards indoor radon is radon exhalation rates, which can be used for estimation of indoor radon levels. The indoor radon and thoron levels from the air and radon exhalation rates from soil samples collected from two districts (Hisar and Fatehabad) of Western Haryana are measured using pin-hole-based radon-thoron dosimeter and LR-115 solid-state nuclear track detector by canister technique. The results show that the indoor radon and thoron levels from Hisar district varied from 11 to 112 and 11 to 80 Bq m

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