Khyber Pakhtunkhwa, Pakistan

Hazara University
Khyber Pakhtunkhwa, Pakistan

Hazara University is located in Dhodial town, Mansehra District, Hazara in the Khyber-Pakhtunkhwa province of Pakistan. The town of Dhodial is near to the city of Mansehra . It was formed in the building and land of Government Mental and General Hospital Dhodial. Hazara University has three faculties: Science, Arts, and Health science.The university was founded in 2002; Hazara University started its operations with meagre resources of one small building for academics and a small administration block.Initially departments of Information Technology, Microbiology, Biochemistry, Chemistry, Education, English, Islamiyat, Cultural Heritage and Tourism Management, Journalism and Mass Communication, Disaster and Rehabilitation Management, Botany, Genetics, Environment science, Economics, Health and Physical Education, Arts and Designing, Political science, Physics, Mathematics Law, and Department of Management science started operations. The University has recently established Department of Conservation Studies to preserve the rich cultural heritage of the country.The university has three campuses: Garden campus , Havelian campus , and Haripur campus . Hazara University is currently ranked at No. 8 in General Universities category of HEC rankings 2011. Wikipedia.

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Parveen A.,Hazara University | Irfan M.,Hazara University | Mohammad F.,Hazara University
International Journal of Pharmacy and Pharmaceutical Sciences | Year: 2012

In the present study we report the comparative anti-hyperglycemic effects of crude ethanolic extracts of the fruit, stem bark and leaves of Grewia asiatica and their fractions in alloxan induced hyperglycemic rabbits. The crude extracts and their fractions were administered orally in suspension and capsule form at the dose of 200mg/kg body weight and 100mg /kg body weight respectively. Oral administration of fruit, stem bark and leaves reduced serum glucose level of alloxan induced diabetic rabbits. The results suggest that the fruit, stem bark and leaves of Grewia asiatica have shown significant antihyperglycemic activity.

Ahmad I.,University of Malakand | Amin B.,Hazara University
Computational Materials Science | Year: 2013

Theoretical calculations of Ga1-xMnxP and Ga 1-xMnxAs (x = 0.125) in the zinc blende phase are presented. The electronic structure and magnetic properties of these compounds are calculated and their correlation is investigated with the lattice compressions. The results show that, both the compounds hold their half-metallic nature, conductor for spin up state and semiconductor for spin down state, with their lattice compressions up to certain critical lattice constants. An abrupt change in the electronic and magnetic properties is observed at these robust transition lattice constants (RTLCs). These compounds loss their integer magnetic moments (4 μβ) and tremendous decrease in the bandgaps (spin down states) start at these critical lattice constants and hence the materials transform from half-metals to degenerate semiconductors. The calculated RTLC for Ga0.875Mn0.125P is 5.14 Å and for Ga0.875Mn0.125As is 5.25 Å. The possible compression in the lattice constants from their relaxed states, while maintaining their half-metallic nature, is up to 6% for Ga 0.875Mn0.125P and 8% for Ga0.875Mn 0.125As. The feasibility of the growth of these compounds on different substrates on the basis of the variation in the lattice constants is also discussed. © 2012 Elsevier B.V. All rights reserved.

Murtaza G.,Hazara University | Ahmad I.,University of Malakand
Journal of Applied Physics | Year: 2012

The structural and optoelectronic properties of LaAlO 3 under pressure have been investigated for the first time using the highly accurate all electrons full potential linearized augmented plane wave method. The calculated lattice parameter at zero pressure is found in excellent agreement with the experimental results. Furthermore, with the increase in the external pressure, the lattice constant as well as bonds length decreases in accordance with the experimental results. The compound at zero pressure is an indirect bandgap semiconductor, while interestingly the indirect nature shifts to direct one with the increase of the pressure. The bonding in the material is of mixed covalent and ionic nature. In optical properties, frequency dependent parameters such as real and imaginary parts of dielectric function, refractive index, reflectivity, optical conductivity, absorption coefficient, and sumrules are calculated under pressure. © 2012 American Institute of Physics.

Din H.U.,Hazara University | Reshak A.H.,University of West Bohemia | Reshak A.H.,University Malaysia Perlis
Computational Materials Science | Year: 2014

In present paper, the structural, elastic, thermal, electronic, optical properties at ambient and high-pressure study of Ag2O are performed using the full-potential linearized augmented plane wave (FP-LAPW) method within the framework of Density functional theory (DFT) as implemented in Wien2k Code. We have used the local density approximation (LDA), Generalized Gradient approximation (GGA) and Engel-Vosko generalized gradient approximation (EV-GGA) for calculating structural properties at 0.0-20.0 GPa pressure. The lattice constant obtained at 0.0 GPa using GGA method, is in good agreement with available experimental results. Decrease in lattice constant is observed with increase in pressure from 0.0 to 20.0 GPa. The electronic, optical and band structure calculations are also carried out using modified Becke-Johnson exchange correlation potential plus generalized gradient approximation (mBJ-GGA). At zero pressure, the calculated band gap using mBJ potential is found to be narrow, direct and comparatively better than calculated through LDA, GGA and EV-GGA. Also, the band gap increases with increase in pressure from 0.0 to 20.0 GPa. From elastic calculations, it is noted that Ag2O is elastically stable and have ductile nature. Moreover, it is revealed that Ag2O is suitable for optoelectronic devices. © 2013 Elsevier B.V. All rights reserved.

Hussain Z.,Abdul Wali Khan University Mardan | Khan K.M.,University of Karachi | Hussain K.,Hazara University
Journal of Analytical and Applied Pyrolysis | Year: 2010

A novel method for the pyrolysis of waste polystyrene was investigated which was based on high temperature by microwave-metal interaction. This interaction may also catalyze the pyrolysis process and affect the nature of products. Polystyrene was rapidly pyrolyzed under microwave while placing in a batch type reactor containing a cylindrical mesh of iron. The iron mesh generates heat in the range of 1100-1200°C which converts polystyrene into 80% liquid, 15% gas and 5% char residue. The liquid product was collected using cold traps and the amount of gas was obtained by taking difference. The liquid product was analyzed using GC/MS and found that it contains styrene in addition to polycyclic aromatics and condensed ring aromatic compounds. The products formation is also discussed. © 2010 Elsevier B.V. All rights reserved.

Nazir S.,Quaid-i-Azam University | Hussain T.,Quaid-i-Azam University | Ayub A.,Quaid-i-Azam University | Ayub A.,Hazara University | And 2 more authors.
Nanomedicine: Nanotechnology, Biology, and Medicine | Year: 2014

The development of novel nanomaterials and their use in biomedicine has received much attention in recent years. Significant advances have been made in the synthesis of nanomaterials with controlled geometry, physicochemical properties, surface charge, and surface tailoring with bioactive polymers. These successful efforts have resulted in improved biocompatibility and active targeting of tumour tissues, leading to the development of a diverse range of nanomaterials that can recognize cancers, deliver anticancer drugs and destroy tumours by a variety of therapeutic techniques. The focus of this review is to provide an overview of the nanomaterials that have been devised for the detection and treatment of various types of cancer, as well as to underline the emerging possibilities of nanomaterials for applications in anticancer therapy. From the Clinical Editor: In this comprehensive review, the current state-of-the art of nanomaterials for cancer diagnosis and treatment is presented. Emerging possibilities and future concepts are discussed as well. © 2014 Elsevier Inc.

Murtaza G.,Hazara University | Ahmad I.,Hazara University
Physica B: Condensed Matter | Year: 2011

The highly accurate all electrons full potential linearized augmented plane wave method is used to calculate structural, electronic, and optical properties of cubic perovskites CsPbM3 (M=Cl, Br, I). The theoretically calculated lattice constants are found to be in good agreement with the experimentally measured values. It is found that all of these compounds are wide and direct bandgap semiconductors with bandgap located at R-symmetry point, while the bandgap decreases from Cl to I. The electron densities reveal strong ionic bonding between Cs and halides but strong covalent bonding between Pb and halides. Optical properties of these compounds like real and imaginary parts of dielectric functions, refractive indices, extinction coefficients, reflectivities, optical conductivities, and absorption coefficients are also calculated. The direct bandgap nature and high absorption power of these compounds in the visibleultraviolet energy range imply that these perovskites can be used in optical and optoelectronic devices working in this range of the spectrum. © 2011 Elsevier B.V. All rights reserved.

Hayat S.S.,Hazara University
Computational Materials Science | Year: 2011

Results of molecular dynamics simulation of the diffusion of two-dimensional 13-atom Cu island on Ag(1 1 1), using many-body potentials obtained from the embedded-atom method, are presented. Simulations carried out at three different temperatures - 300, 500 and 700 K - show shape-changing multiple-atom processes are responsible for the diffusion of islet. Arrhenius plot of the diffusion coefficients provide effective energy barrier of 232.06 ± 10 mev and diffusion prefactor 1.034 × 10 13 2/s. A striking and interesting feature of pop-up of single-atom at 500 K and three-atom at 700 K among 13-atom island is observed, with correlative changes in position and shape of the lower-layer adatoms. Surface dynamics in the presence of an island produced dislocations and fissures near the island. © 2010 Elsevier B.V. All rights reserved.

Amin B.,Hazara University | Ahmad I.,Hazara University | Maqbool M.,Ball State University
Journal of Lightwave Technology | Year: 2010

Optical properties of BxIn1-xN are calculated as a function of the varying concentration of Boron and Indium. Indium is gradually replaced by Boron and optical properties of the resulting materials are studied. The fractional concentration of Boron is increased gradually from x= 0 to x= 1 in steps of 0.25. The bandgap increases with the increasing Boron concentration, from 0.95 eV for pure InN to 5.6 eV for BN. A unique behavior of BN in zinc-blend phase is observed, that is, it shifts from indirect to direct bandgap semiconductor by the substitution of In on B sites. This behavior can be used to make novel and advanced optical devices. Frequency dependent reflectivity, absorption coefficient, and optical conductivity of BxIn1-xN are calculated and found to be the constituent's concentration dependent. The region of reflectivity, absorption coefficient and optical conductivity shifts from lower frequency into the higher frequency as the material goes from pure InN to pure BN. © 2010 IEEE.

Paul R.F.,Hazara University
Journal of Ayub Medical College, Abbottabad : JAMC | Year: 2011

Leptin is product of ob gene, an adipose tissue derived hormone that plays a key role in the regulation of body fat mass by regulating appetite and metabolism while balancing energy intake and energy expenditure. The objective of the study was to evaluate possible association between serum Leptin levels and Body Mass Index (BMI) of gender in adult age group. Two-hundred-seventy subjects aged 20-50 years were randomly selected from general population of Abbottabad. After complete evaluation, demographic data was recorded and BMI calculated. The subjects were grouped on the basis on BMI. Non-fasting venous blood samples were drawn to measure serum Leptin and serum glucose levels. The data were analysed using SPSS-15. Serum Leptin levels and differences between genders were significant in all body mass indices. For normal BMI group the mean values for leptin were 2.6 +/- 1.5 etag/ml in men, and 17.3 +/- 10.2 etag/ml in women. For Group-2 mean leptin levels were 9.9 +/- 6.8 etag/ml in men, and 34.8 +/- 13.6 etag/ml in women. For Group-3 BMI comprising obese subjects mean values were 21.3 +/- 14.2 etag/ml in men, and 48.21 +/- 21.2 etag/ml in women (p<0.001). A progressive increase in serum leptin concentration was observed with an increase in BMI. Significant difference between leptin concentrations in either gender was found in normal, overweight and obese subjects.

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