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Search Results: 1 - 10 of 8666 matches for " Arshad Ahmad "
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Transmuted Exponentiated Moment Pareto Distribution  [PDF]
Muhammad Zeshan Arshad, Muhammad Zafar Iqbal, Munir Ahmad
Open Journal of Statistics (OJS) , 2018, DOI: 10.4236/ojs.2018.86063
Abstract: In this work, the authors proposed a four parameter potentiated lifetime model named as Transmuted Exponentiated Moment Pareto (TEMP) distribution and discussed numerous characteristic measures of proposed model. Parameters are estimated by the method of maximum likelihood and performance of these estimates is also assessed by simulations study. Four suitable lifetime datasets are modeled by the TEMP distribution and the results support that the proposed model provides much better results as compared to its sub-models.
Kinetic Study of Growth and Penicillin G Acylase Production by Escherichia coli
Rubina Arshad,Muhammad Salih Ahmad
Pakistan Journal of Biological Sciences , 2000,
Abstract: Penicillin G acylase (PGA) is one of the most widely used enzymes at an industrial scale. It is used to hydrolyze penicillin G to produce 6-aminopenicillanic acid (6-APA), a required intermediate in the production of semi-synthetic penicillins. Escherichia coli is the most abundantly used organism for PGA production. Present study was focused on the kinetics of growth and PGA production of three local E. coli isolates, FH6-NIAB, FMu2-NIAB and FD25-NIAB. Optimal enzyme production was reached after 18 hr. For longer incubations, the enzymatic activity decreased slightly. PGA activity was detectable after about 6 hours of incubation. For the selected isolates, PGA production was determined for various concentrations of glucose and phenylacetic acid in the medium. PGA production by E. coli isolates was completely repressed by glucose concentration above 5 g/l. Production of PGA by E. coli isolates was completely dependent upon the presence of PAA in the medium and optimal enzyme activity was obtained between 1 g/l and 2 g/l of PAA. Enzyme activity was found to be highest when PAA was used as an inducer. PGA production by our local E. coli isolates was completely inducible.
Employee Engagement and Strategic Communication in Saudi Arabian Banks
Arshad Ahmad,Abdullah M Aldakhil
IBIMA Business Review , 2012,
Abstract: The purpose of this paper is to examine the perceptions of individual employees on communication and its impacts on employee engagement in banks. Despite the extensive research on employee engagement and communication, very little or no empirical research has examined this scope of investigative study. Therefore, the hypotheses are developed to test and examine this relationship empirically. This study contributes in advancing the employee engagement literature to understand the association between communication and employees engagement within the context of banking industry. The results of this study reveal that communication with shared purpose, leadership attention, and communication based on dialogue are significantly positively associated with employee engagement. In communication, leadership attention is found to be strongly associated with employee job satisfaction and commitment in employee engagement.
Short Communication: Rhizosphere bacteria containing ACC-deaminase conferred drought tolerance in wheat grown under semi-arid climate
Masood Ahmad Shakir,Asghari Bano,and Muhammad Arshad
Soil & Environment , 2012,
Abstract: Certain rhizobacteria have the potential of lowering endogenous ethylene levels in plants because of their 1- aminocyclopropane-1-carboxylate (ACC)-deaminase activity and promoting root growth. This mechanism is of great agronomic significance under stress environments, which are known to induce accelerated production of ethylene. Thirty rhizobacteria were isolated from rhizosphere of wheat (Triticum aestivum L.) growing in the Southern Punjab, a semi-arid region of Pakistan. Rhizobacteria were screened for ACC-deaminase activity and their potential to confer drought tolerance in wheat crop. Results of laboratory study revealed that selected rhizobacteria lowered endogenous ethylene levels in the rhizosphere as measured by Gas Chromatograph. Axenic studies showed that inoculation increased root-shoot length, root-shoot mass and lateral root number of the inoculated plants by 141, 44, 196, 52 and 30%, respectively, over control. Better-developed roots because of inoculation with plant growth promoting rhizobacteria (PGPR) helped plants, a better crop stand that enhanced moisture and nutrient feeding volume resulting-in improved growth and yields of wheat crop. Two-year multi-location field trials inferred optimum yields with low delta water in semi-arid climate by PGPR containing ACC-deaminase. The enzyme ACC-deaminase probably lowered harmful ethylene levels which partially eliminated drought stress consequently utilizing soil moisture from lower profiles through proliferated roots.
Mixed Ammonium and Nitrate Nutrition of Wheat Under Different Soil Salinity Regimes
M. Arshad,M. Sharif Zia,Tahira Ahmad
Pakistan Journal of Biological Sciences , 1999,
Abstract: Effect of varying NH4+ N: NO3 N ratios on wheat yield and N utilization on artificially salinized soil with salinity regimes of 0, 6 and 12 dS m 1 under pot culture conditions revealed that productive tillers, grain, straw and total biomass were the highest with NH4+ N: NO3 N ratio of 50:50. These growth parameters were the lowest where either NH4+ -N or NO3 N was used alone. Similarly N uptake and N recovery in wheat was significantly higher at optimum NH4+ N: NO3 N ratio of 50:50 than where NH4+ N or NO3 N alone was used. Increasing salinity levels significantly reduced the wheat yields and N utilization. However, balanced N nutrition was helpful to ameliorate the harmful affect of salinity to some extent.
Management of Foot Drop due to Post Injection Sciatic Nerve Injury
Buhroo AM,Ahmad MS,Arshad S
Indian Journal of Physical Medicine and Rehabilitation , 2007,
Abstract: A three year clinical study on 215 patients with post injection sciatic nerve injury was conducted andmanagement was guided by nerve action potential (NAP) recordings, and thorough clinical assessment.During this study normal conventional and some modified methods were instituted in the rehabilitationtreatment. The treatment included electrotherapy, Stimulation of calf and foot to prevent denervationatrophy, maintaining T.A flexibility by T.A stretching exercises, facilitating gait with the use of light weightPolypropylene AFO (foot drop splint), and use of same splint during night to maintain ankle at neutralposition. Reassurance was given to care psychological set back caused due to foot drop.Out of 215 patients 155 patients achieved remarkable recovery in one year, this included 5 patients withmild weakness without foot drop. 35 patients achieved improvement in 18 months and 19 patients had poorrecovery where the drop foot did not recover, while as 6 patients were lost to follow up. It was concludedthat patients attending earlier for rehabilitation programme had purposeful motor recovery, no TA tightnessand minimum wasting. Light weight foot drop splint remarkably improved ambulation.
Knowledge Management: A Solution to Requirements Understanding in Global Software Engineering
Hashim Khan,Arshad Ahmad,Mohammed A. Alnuem
Research Journal of Applied Sciences, Engineering and Technology , 2012,
Abstract: The aim of the study is to identify useful Knowledge Management (KM) practices/tools in order to overcome Requirements Understanding (RU) challenges in Global Software Engineering (GSE). As Requirements Engineering (RE) is considered one of the most crucial, human intensive and challenging phase of software engineering. A paradigm shift from traditional co-located to offshore development has introduced additional complications in RE specifically in RU. Issues in GSE like involvement of people from diverse culture, different inter-personal communication and coordination skills leads to RU problems. For this, the need of proper practices/tools to overcome RU challenges in global setting is obvious from literature. So, this study focuses on two things. Firstly, in this study authors have mentioned major RU challenges in GSE which were identified in author’s pervious study. Secondly, authors have identified useful Knowledge Management (KM) practices/tools that can aid globally dispersed software development teams in RU. For this purpose, industrial surveys were conducted in software companies involved in GSE. Thereby, useful KM practices such as Document Management, Competence Management and Knowledge sharing processes such as Socialization are identified to address RU issues faced in GSE. In addition, modern and advanced ICT tools such as video and audio conferencing, Forums, Intranets, have also been proposed for overcoming these challenges. Moreover, a detailed analysis is presented that how a specific KM practice/tool helps to cater a specific RU challenge.
Taxonomic Study and Medicinal Importance of Three Selected Species of the Genus Artemisia Linn
Rizwana Aleem Qureshi,Mushtaq Ahmad,Muhammad Arshad
Asian Journal of Plant Sciences , 2002,
Abstract: The study was confined to the 3 medicinally important species of the genus Artemisia Linn. The morphological features, such as, plant size, leaf-shape and size, petiole length, the inflorescence type and the details of capitulum, i.e., the disc and ray florets were studied from the herbarium specimens preserved in the Quaid-I-Azam University Herbarium. Many properties and the uses of these species were determined. The studies on morphological characters revealed that the characters like, heads either homogamous or heterogamous and the receptacle either glabrous or hairy, number of the florets per head were taxonomically most important to differentiate these species. Among these species it was observed that A. absinthium Linn. was mostly used against liver diseases.
Phytogeographical Distribution of Vegetation in Desert Area of Islamia University, Bahawalpur
Imtiaz Ahmad,Mohammad Arshad,Hafza Bibi
Journal of Biological Sciences , 2001,
Abstract: To analyze the vegetation, phytogeographical study in desert area of Baghdad-ul-Jadeed Campus, Islamia University, Bahawalpur was conducted. Importance value index (IVI) pertaining to 19 plant species found in the study area. Lasiurus scindicus, Cenchrus ciliaris, Aristida adscensionis, Capparis decidua, Calligonum polygonoides, Aerva persica and Tribulus longepetalus were the commonest species in nearly highest values found in different quaderats of the desert followed by Cenchrus biflorus, Salsola baryosma and Cymbopogan jwarancusa. Rare and low IVI species were Haloxylon salicornicum, Suaeda fruticosa, Alhagai maurorum and Launea closely followed by Euphorbia prostrata and Sesuvium sesuvioides. Seasonal differences were significantly variable, the highest in February and October and the lowest in May, positively related with precipitation of the area. Ephemeral/annuals are the new comers in this study area being the rarest and the poorest for Importance Value Index (IVI) records.
Analysis of the Pyrolytic Fuel Properties of Empty Fruit Bunch Briquettes
Bemgba Bevan Nyakuma,Anwar Johari,Arshad Ahmad
Journal of Applied Sciences , 2012,
Abstract: Briquetting is technique for mechanically compacting and densifying loose materials into a uniform solid fuel aimed at improving the physical and thermochemical properties such as energy density, moisture content. This study is aimed at investigating the pyrolytic fuel properties of briquettes using DSC thermal analysis. The EFB Briquettes were pulverized and sieved in a Retsch analysis sieve with screen size 800 micron. The Higher Heating Value (HHV) of the fuel was determined using a bomb calorimeter according to the ASTM standard D-2015 technique. Proximate analysis was carried to determine the moisture content, volatile matter, fixed carbon and ash content of the fuel. The powdered EFB briquette was analyzed using a Perkin Elmer DSC 7 thermal analyzer under pyrolysis conditions from 30 to 500°C at a constant heating rate of 10°C min-1 with nitrogen (N2), flow rate of 25 mL min-1 as sweeping gas. The calorific changes during DSC analysis were recorded and analyzed. A Scanning Electron Microscope (SEM) was used to investigate the surface composition and particle size distribution of the fuel. Surface analysis revealed that 57% of the fuel particles are in the 151-250 μm range. The HHV value of the fuel obtained was 17.57 MJ kg-1 and specific heat Cp = 1,397 J kg-1 K-1. From the FTIR spectra of the fuel, the product gases as H2, CO, CO2, CH4 and CmHn can be reasonably predicted. The results indicated that EFB briquette has good fuel properties and can be utilized as a fuel in biomass pyrolysis.
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