Barkatullah University is a university in Bhopal, India. Originally known as Bhopal University, it was renamed in 1988 after the great freedom fighter Prof. Barkatullah, who was born in the area. It is the main university of the capital city and provides degrees to most of the non-technical colleges in and around Bhopal. Funded by the state government, the university has a residential campus and serves as an affiliating university for colleges of seven other districts. The institution affiliates the colleges of Bhopal district and other neighbouring districts like Sehore, Vidisha, Raisen, Betul, Hoshangabad, Harda and Rajgarh. Barkatullah University has been accredited as a B category university by the National Assessment and Accreditation Council . Wikipedia.
Saini S.,National Institute of Oceanography of India |
Gwal A.K.,Barkatullah University
Journal of Geophysical Research: Space Physics | Year: 2010
In the present paper investigations are made on the lower ionosphere with the help of observed tweek atmospherics at the Indian Antarctic research station Maitri during the second half of austral summer (January-March of 2003 and 2005). The variations in the lower ionospheric reflection height are found to be in correspondence with the sunrise and sunset at Maitri. The results indicate that the tweek atmospherics are helpful in tracking the changes taking place in the lower ionospheric height through the day-night boundary. The ionospheric reflection height estimated using the cutoff frequency of fundamental (first-harmonic or first-mode) tweek atmospherics ranges from ∼64 to ∼79 km with a maximum calculated error of ± 2.7 km. The recordings were carried out from 1800 to 0600 UTC. The analysis shows that the average cutoff frequency for the fundamental tweek atmospherics and hence the ionospheric reflection height varies from the months of January to March in accordance with the sunrise and sunset. Copyright 2010 by the American Geophysical Union.
Sarwan M.,Barkatullah University |
Singh S.,Barkatullah University
Journal of Alloys and Compounds | Year: 2013
The pressure induced crystal properties of group III-nitrides have been investigated by means of modified interaction potential model (MIPM) which consists of Coulomb, three-body and short-range overlap repulsive up to second neighbour ions, covalency effect and van der Waal's interactions. These compounds exhibit first-order phase transition from their initial ZnS-type structure to NaCl-type structure at pressures 555, 21, 37 and 8.2 GPa for XN (X = B, Al, Ga and In) respectively. Their equation of state shows volume collapse of 3.6%, 17%, 16.53% and 17.73%. The elastic constants and thermophysical properties have also been obtained at zero and high pressures. The results are in good agreement with the experimental and theoretical data where available. This model is capable of explaining the phase transition, Cauchy's discrepancy and elastic and mechanical properties successfully. © 2012 Elsevier B.V. All rights reserved.
Ayaz E.,Barkatullah University |
Gothalwal R.,Barkatullah University
Cellular and Molecular Biology | Year: 2014
Biodegradation of complex hydrocarbons usually requires the cooperation of more than a single species of microorganisms including bacteria. This is particularly true in pollutants that are made up of many different compounds such as crude oil or petroleum, and where complete mineralization to CO2 and H2O is desired. An effort has been made to form the consortium of bacterial isolates (Qs1, Qs2 and Qs5) which are isolated from oil contaminated soil, and the effects of different environmental factors on these consortium has been studied . The growth of the consortium was studied at 6.5 pH and 35°C like the individual bacterial isolates on the different hydrocarbons (xylene, toluene, hexane, diesel, benzene and petrol). These consortium of bacterial isolates, shared more efficient utilization of hydrocarbon as carbon source. This consortium shows confluent growth- at pH 6.0, 5.5, and 5.0 but survival rate decreases at pH above 6.5. Extremes in pH were shown to have a negative influence on the ability of microbial populations to degrade hydrocarbons. They also show the higher growth rate at the higher temperature range (up to 40°C) but their growth rate decreases at lower temperature range (below 25°C). It is suggested that the use of above bacterial consortium (at 35°C temperature and 6.5pH) will be an effective and eco-friendly technology for the remediation of hydrocarbons. © 2014.
Singh S.,Barkatullah University |
Bhardwaj P.,Barkatullah University
Journal of Alloys and Compounds | Year: 2011
In the present paper, we have investigated the high-pressure structural phase transition of rare earth antimonides (HoSb and TmSb). A modified interaction potential model (MIPM) (including the covalency effect) has been developed. Phase transition pressures are associated with a sudden collapse in volume. At compressed volumes, these compounds are found in CsCl phase. The phase transition pressures and associated volume collapses obtained from present potential model show a generally good agreement with available experimental data and others. The elastic constants and bulk modulus are also reported. Our results are in general in good agreement with experimental and theoretical data where available, and provide predictions where they are unavailable. © 2011 Elsevier B.V.
Parveen A.,Barkatullah University |
Gaur N.K.,Barkatullah University
Journal of Magnetism and Magnetic Materials | Year: 2012
The bulk modulus and thermal properties of orthovanadates SmVO 3 and EuVO 3 in the temperature range 5 K≤T≤300 K have been investigated using the Modified Rigid Ion Model (MRIM) by incorporating the effect of lattice distortions. The results on the specific heat, cohesive energy, molecular force constant, the reststrahlen frequency and the Gruneisen parameter following the temperature driven structural phase transitions are presented. Our results are in fair agreement with the available experimental data. The specific heat results can further be improved by including the spin and orbital ordering contributions to the specific heat. © 2012 Elsevier B.V. All rights reserved.