University of Peshwar

of Peshwar, Pakistan

University of Peshwar

of Peshwar, Pakistan
Time filter
Source Type

Rahman T.U.,Abdul Wali Khan University Mardan | Rahman T.U.,University of Peshwar | Arfan M.,University of Peshwar | Mahmood T.,COMSATS Institute of Information Technology | And 10 more authors.
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2015

The phytochemical examination of chloroform soluble fraction (FX2) of methanolic extract of bark of Millettia ovalifolia yielded a new flavonoid; 7-(4-methoxyphenyl)-9H-furo [2,3-f]chromen-9-one (1). Compound 1 is characterized by spectroscopic analytical techniques such as UV, IR, 1D, 2D NMR spectroscopy, and mass spectrometry. A theoretical model is also developed for obtaining geometric, electronic and spectroscopic properties of 1. The geometry optimization and harmonic vibration simulations have been carried out at B3LYP/6-31G(d,p). The vibrational spectrum of compound 1 shows nice correlation with the experimental IR spectrum, through a scaling factor of 0.9613. 1H and 13C NMR chemical shifts are simulated using Cramer's re-parameterized function WP04 at 6-31G(d,p) basis set, and correlate nicely with the experimental chemical shifts. © 2015 Elsevier B.V.

Muhammad N.,Petronas University of Technology | Maitra S.,Petronas University of Technology | Ul Haq I.,University of Peshwar | Farooq M.,Petronas University of Technology
Ceramica | Year: 2011

A set of composite materials were developed by blending polymethyl methacrylate (PMMA) with different amounts of micro-fine amorphous silica and titanium dioxide for application as artificial teeth. Wear resistances of these composites were measured with the help of a modified pin-on-disc tribometer and compared with commercial artificial teeth sample in the presence of artificial saliva. It has been observed that under the similar biological condition the powder fillers improved the wear resistances of the artificial teeth as compared to the commercial one under identical condition.

Nisar M.,University of Peshwar | Kaleem W.A.,University of Peshwar | Adhikari A.,University of Karachi | Ali Z.,University of Karachi | And 4 more authors.
Natural Product Communications | Year: 2010

The structures of (3S,7R,13S)-6-[2-(dimethylamino)-3-phenylpropanoyl]-19- methoxy-2-oxa-6,9,15-triazatetracyclo[,7. 0 9,13]docosa-1-(22),16,18,20-tetraene-8,14-dione (1), nummularin-C (2) and nummularin-R (3) have been previously determined mainly based on mass spectrometric data. Stereochemistry and complete 1H and 13C NMR spectroscopic data assignments of these compounds are now described. Compounds 1 and 2 are reported for the first time from Zizyphus oxyphylla.

Khattak K.F.,Abdul Wali Khan University Mardan | Liaqat W.,University of Peshwar | Zaman K.,Abdul Wali Khan University Mardan | Musharraf S.G.,University of Karachi
Records of Natural Products | Year: 2015

The phytochemical examination of the extract of bark of Millettia ovalifolia yielded chemical constituents, which included one novel flavonoid 7-(4-methoxyphenyl)-9H-furo 2, 3-f. chromen-9-one and four new source compounds characterized as 3,7-Dihydroxy-2-phenyl-4H-chromen-4-one, (E)-Ethyl-13-(3,4-dimethoxyphenyl)acrylate, (E)-Methyl-3-(3,4-dimethoxyphenyl)acrylate and N-Ethylacetamide. These compounds were characterized by using advance modern spectroscopic analytical techniques such as UV, IR, 1D, 2D NMR and mass spectrometry. The novel flavonoid (1) displayed significant inhibition of cytosolic form of bovine carbonic anhydrase-II with IC50 value of 17.86 ± 0.07 μM. This flavonoid may be used as a new pharmacophore to treat cystic fibrosis, glaucoma, epilepsy, leaukomia and other disorders such as neurology etc. © 2015 ACG Publications. All rights reserved.

Arif S.,Hazara University | Haneef M.,Hazara University | Akbar J.,Hazara University | Mohammad S.,Hazara University | And 5 more authors.
Journal of the Korean Physical Society | Year: 2012

The influence of laser polarization angle on the photodetachment of H - near a reflecting surface is investigated based on a theoretical imaging technique. An analytical expression for the photodetachment cross section is derived. The photodetachment cross section of H - near a reflecting surface is found to be not only related to the inter-ion-surface distance and the photon energy but also the laser polarization angle θ L. A strong oscillating structure is noted for θ L = 0°. As the angle continues to increase, the oscillating structure diminishes, and for θ L = 90°, the oscillating structure in the cross section reduces to a non-oscillating structure. © 2012 The Korean Physical Society.

Haneef M.,Hazara University | Mohammad S.,Hazara University | Akbar J.,Hazara University | Arif S.,Hazara University | And 2 more authors.
Chinese Physics Letters | Year: 2012

The photodetachment of a hydrogen negative ion (H -) near a partially reflecting surface with a spherical shape is investigated by a theoretical imaging method. Analytical expressions for the detached electron flux and total photodetachment cross section are derived. It is found that two parameters, i.e. curvature radius r c and reflection parameter K, control the photodetachment spectra. Furthermore, these parameters can be used for the classification, identification and revelation of minor details like curvature of different types of surfaces. © 2012 Chinese Physical Society and IOP Publishing Ltd.

Loading University of Peshwar collaborators
Loading University of Peshwar collaborators