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Search Results: 1 - 10 of 325844 matches for " Bhatti Arshad S. "
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Assessment of environmental gamma dose in northern Rechna Doab in Pakistan
Jabbar Abdul,Bhatti Arshad S.,Ahmad Syed S.,Arshed Waheed
Nuclear Technology and Radiation Protection , 2009, DOI: 10.2298/ntrp0901056j
Abstract: Environmental gamma radiation levels in northern Rechna Doab, Pakistan, were measured as a part of systematic study aimed at the establishment of the background data base of radiation and radioactivity levels. The measurements reported in this paper were made with portable radiation monitor which employed GM tube and was calibrated against secondary standard dosimetry system. The average absorbed dose rate in air was determined to vary from 86.0 nGy/h to 139.1 nGy/h with the mean value of 109.1 nGy/h. The annual effective dose remained within the range of 105.47 mSv to 170.54 mSv with its average value of 133.73 mSv. These environmental radiation doses in the area were comparable with those reported for other countries. It was concluded that the prevalent radiation levels did not pose any significant radiological health hazard to the population.
Removal of Micrometer Size Morphological Defects and Enhancement of Ultraviolet Emission by Thermal Treatment of Ga-Doped ZnO Nanostructures
Umair Manzoor, Do K. Kim, Mohammad Islam, Arshad S. Bhatti
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0086418
Abstract: Mixed morphologies of Ga-doped Zinc Oxide (ZnO) nanostructures are synthesized by vapor transport method. Systematic scanning electron microscope (SEM) studies of different morphologies, after periodic heat treatments, gives direct evidence of sublimation. SEM micrographs give direct evidence that morphological defects of nanostructures can be removed by annealing. Ultra Violet (UV) and visible emission depends strongly on the annealing temperatures and luminescent efficiency of UV emission is enhanced significantly with each subsequent heat treatment. X-Ray diffraction (XRD) results suggest that crystal quality improved by annealing and phase separation may occur at high temperatures.
Long run Relationship among East Asian equity markets and KSE
Rana Yasir Hussain,Haroon Hussain,Ghulam Ali Bhatti,Arshad Hassan
Management Science Letters , 2012,
Abstract: The dependence of various stock markets plays a vital role in diversification while selecting securities in an investor’s portfolio. This study examines interdependence among the East Asian stock markets in relation to the Karachi Stock Exchange. Monthly data ranging from 2000 to 2010 is included and tested in this paper. This relationship is tested by using descriptive statistics and correlation matrix. Data stationarity is ensured by Unit Root Test. Evidence from Granger Causality and Impulse Response Test prove no relationship between KSE and stock markets of the East Asian countries while there exists certain level of unidirectional relationship from Japan to China and from Japan to Pakistan.
Bilateral accessory Iris membrane
Bhatti S,Kapoor Harpreet
Indian Journal of Ophthalmology , 1998,
Adult systemic cat scratch disease associated with therapy for hepatitis C
Zahida Bhatti, Charles S Berenson
BMC Infectious Diseases , 2007, DOI: 10.1186/1471-2334-7-8
Abstract: A 52 year old man being treated for hepatitis C presented with diffuse lymphadenopathy, weight loss, fevers and splenic lesions. Symptoms were initially confused with adverse effects of his regimen, delaying recognition of his infection. Diagnostic investigation, including histopathology, microbiology and serologic parameters, confirmed that his illness was due to disseminated cat scratch disease with Bartonella henselae.Disseminated CSD is exceptionally rare in adults. We describe the first case of disseminated cat scratch disease associated with peginterferon α and ribavirin to alert clinicians of the need to be aware of unusual manifestations of common infections in this population.Cat scratch disease (CSD) most commonly presents as a localized granulomatous and suppurative lymphadenopathy caused by Bartonella henselae, a small fastidious gram-negative argyrophillic bacillus [1,2]. While the overwhelming majority of systemic CSD occurs in children, especially with hepatosplenic involvement, disseminated CSD is exceedingly rare in immunocompetent adults [3,4].Interferon α and ribavirin are mainstays of treatment for chronic hepatitis C, that have been associated with aberrant immune-mediated host responses, that may resemble adverse pharmacologic effects. In this report, we present the first description of disseminated CSD in an adult receiving interferon α ? MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaacuaHXoqygaacaaaa@2E5A@ 2a and ribavirin for treatment of chronic hepatitis C, in whom signs and symptoms were initially confused with adverse effects of medications. We offer our experience to alert clinicians of the need for awareness of unusual manifestations of commons infections in this population.A 52-year-old male with a history of hepatitis C, genotype 1b, was
Bioleaching of metal ions from low grade sulphide ore: Process optimization by using orthogonal experimental array design
S Ilyas, HN Bhatti, IA Bhatti, MA Sheikh, MA Ghauri
African Journal of Biotechnology , 2010,
Abstract: The present work was aimed at studying the bioleachability of metal ions from low grade sulphide ore containing high amount of carbonaceous materials by selected moderately thermophilic strain of acidophilic chemolothotrophic bacteria, Sulfobacilllus thermosulfidooxidans. The bioleaching process was optimized by constructing L25 Taguchi orthogonal experimental array design and optimization of variable proportions of process parameters. Five factors were investigated and twenty five batch bioleaching tests were run under lower, medium and higher levels of these factors. The parameters considered for shake flask leaching experiments were initial pH (1.8, 2, 2.5, 3, 3.5), particle size, (50, 100, 120, 200, 270 m), pulp density (1, 5, 10, 15, 25%), temperature (40, 45, 47, 52, 57oC) and agitation (100, 120, 180, 220, 280 rpm). Statistical analysis (ANOVA) was also employed to determine significant relationship between experimental conditions and yield levels. The experimental results for selective leaching showed that under engineered leaching conditions; pH 1.8, particle size 120 m, pulp density 10%, temperature 47°C and agitation 180 rpm, the percent bioleachabilities of metals were Zn 72%, Co 68%, Cu 78%, Ni 81% and Fe 70% with an inoculum size of 1.0 ×107 /mL.
Synthesis of ZnO Nanostructures for Low Temperature CO and UV Sensing
Muhammad Amin,Umair Manzoor,Mohammad Islam,Arshad Saleem Bhatti,Nazar Abbas Shah
Sensors , 2012, DOI: 10.3390/s121013842
Abstract: In this paper, synthesis and results of the low temperature sensing of carbon monoxide (CO) gas and room temperature UV sensors using one dimensional (1-D) ZnO nanostructures are presented. Comb-like structures, belts and rods, and needle-shaped nanobelts were synthesized by varying synthesis temperature using a vapor transport method. Needle-like ZnO nanobelts are unique as, according to our knowledge, there is no evidence of such morphology in previous literature. The structural, morphological and optical characterization was carried out using X-ray diffraction, scanning electron microscopy and diffused reflectance spectroscopy techniques. It was observed that the sensing response of comb-like structures for UV light was greater as compared to the other grown structures. Comb-like structure based gas sensors successfully detect CO at 75 °C while other structures did not show any response.
Xenon arc photocoagulation in the treatment of central serous retinopathy.
Bhatti S,Adrianwala S,Jehangir R
Journal of Postgraduate Medicine , 1986,
Photo-Catalytic Activity of Ca1-xNixS Nanocrystals  [PDF]
Rupali Sood, Barinder Singh, Dinesh Kumar, H. S. Bhatti, Karamjit Singh
Optics and Photonics Journal (OPJ) , 2015, DOI: 10.4236/opj.2015.57020
Abstract: Ca1-xNixS (0 ≤ x ≤ 0.05) nanocrystals have been synthesized by facile solid state reaction method. Synthesized nanocrystals are further etched with mild acid solutions to reduce the particle size, which augments the surface to volume ratio and confinement of carriers. Crystallographic and morphological characterizations of synthesized nanomaterials have been done by X-ray diffraction and electron microscopy, respectively. Comparison of the diffraction and electron microscopy studies reveal the formation of single crystalline nanostructures. Optical characterization of synthesized nanomaterials has been done by UV-vis. absorption spectroscopic studies. The photo-catalytic activity of synthesized nanomaterials under UV irradiation has been tested using methylene blue (MB) dye as a test contaminant in aqueous media. Photo-catalytic behaviour dependence on dopant concentration and etching has been thoroughly studied to explore the potential of synthesized nanomaterials for next era optoelectronic industrial applications as well as polluted water purification.
Suture supported P C IOL in a homocystinuric child.
Bhatti S,Agashe A,Jehangir R
Journal of Postgraduate Medicine , 1996,
Abstract: A homocystinuric child presented with a secondary pupillary block glaucoma due to anteriorly subluxated lens. After removal of the subluxated lens, a suture supported posterior chamber IOL was implanted. Postoperative complication of cerebral venous thrombosis following general anaesthesia was managed with high doses of pyridoxine special diet and drugs.
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