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Search Results: 1 - 10 of 401314 matches for " M. Qasim "
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Estimation of Genetic Diversity in Sheep (Ovis aries) using Randomly Amplified Polymorphic DNA
M. Qasim
International Journal of Animal and Veterinary Advances , 2011,
Abstract: Domestic sheep (Ovis aries) belongs to order Artiod actyla. Despite its great economic importance, not much work has been done in Pakistan on breeding and genetics of sheep. Present research was initiated to analyze DNA based genetic diversity in Pakistani breeds of sheep. Total genomic DNA was isolated from blood of Rambouillet, Kaghani and Ramghani breeds. Polymerase Chain Reactions (PCR) were carried out using six Randomly Amplified Polymorphic DNA (RAPD) primers. Amplified fragments ranged in size from 500 bp to 2000 bp. On average, 3 alleles per genotype were amplified. Average genetic distance estimate ranged from 30-100%. Eleven comparisons showed maximum genetic diversity (GD = 100%) while 6 comparisons sowed minimum genetic diversity (GD = 30%) for the loci detected using 6 RAPD primers. Phylogenetic elaboration among the 14 sheep accessions were carried out using dendrogram analysis. The 14 accessions of sheep were grouped into 5 clusters comprising 3 , 3, 3, 3 and 2 accessions, respectively.
Falkner-Skan Flow of a Maxwell Fluid with Heat Transfer and Magnetic Field
M. Qasim,S. Noreen
International Journal of Engineering Mathematics , 2013, DOI: 10.1155/2013/692827
Abstract: This investigation deals with the Falkner-Skan flow of a Maxwell fluid in the presence of nonuniform applied magnetic fi?eld with heat transfer. Governing problems of flow and heat transfer are solved analytically by employing the homotopy analysis method (HAM). Effects of the involved parameters, namely, the Deborah number, Hartman number, and the Prandtl number, are examined carefully. A comparative study is made with the known numerical solution in a limiting sense and an excellent agreement is noted. 1. Introduction The Falkner-Skan problem under various aspects has attracted the attention of several researchers [1]. This problem under various aspects has been discussed extensively for viscous fluid. The interested readers may consult the studies in [2–11] for detailed information in viscous fluids. There are several materials which do not obey the Newton's law of viscosity, for example, biological products like blood and vaccines, foodstuffs like honey, ketchup, butter, and mayonnaise, certain paints, cosmetic products, pharmaceutical chemicals and so forth. These fluids are characterized as the non-Newtonian fluids. Investigation of such fluids is very useful in industrial, engineering, and biological applications. However, such fluids cannot be studied by employing a single constitutive relationship. This is due to diverse properties of non-Newtonian fluids in nature. These non-Newtonian fluid models are discussed in view of three main categories, namely, the differential, the rate, and the integral types. The simplest subclass of rate type fluids is called Maxwell. The Maxwell fluid allows for the relaxation effects which cannot be predicted in differential type fluids, namely, second, third, and fourth grades. Recently, there has been an increasing interest in the theory of rate type fluids and, in particular, a Maxwell fluid model has been accorded much attention. The Falkner-Skan wedge flow of a non-Newtonian fluid was firstly investigated by Rajagopal et al. [12]. Massoudi and Ramezan [13] discussed the effect of injection or suction on the Falkner-Skan flows of second grade fluids. The Falkner-Skan wedge flow of power-law fluids embedded in a porous medium is investigated by Kim [14]. Olagunju [15] studied this flow problem for viscoelastic fluid. In [10–15], the attention has been given to the differential type fluids. To the best of our knowledge, no one investigated the Falkner-Skan flow problem for rate type fluids. In [10], Yao has examined the Falkner-Skan wedge flow. He established series solution for the velocity and temperature by
Cracking Phenomenon in Spot Welded Joints of Austenitic Stainless Steel  [PDF]
Ahmed M. Al-Mukhtar, Qasim M. Doos
Materials Sciences and Applications (MSA) , 2013, DOI: 10.4236/msa.2013.410081

The spot welds nugget cracking of austenitic stainless steel at temperatures between 700°C - 1010°C was investigated. Traditionally, the cracks have been observed around the spot nugget in welded temperature. Actually, these cracks are developed due to incomplete melting and inappropriate electrode pressure, which causes an expulsion of molten metal. These cracks start to grow and cause either the interface or plug fracture according to the loading type. In this work, the micro-cracks in the weld nugget were indicated for this type of steel at elevated temperature. Cracks appear in a certain range of temperature; about 700°C - 750°C. The cracks like defect and cavitations were presented. According to the fracture mechanics point of view, these cracks reduce the mechanical strength. Therefore, these cracks have to be taken into account with a certain precaution. Moreover, considering the working temperature and reducing the element may develop ferrite particles.

Effect of Increasing Levels of Phosphorus and Seed Rate on the Economic Yield of Maize
M. Qasim,Himayatullah,M. Subhan
Journal of Biological Sciences , 2001,
Abstract: Number of cobs per plot, 1000-grain weight and grain yield were significantly effected by various levels of phosphorus and seed rate. Maximum number of cobs per plot (72.58), 1000-grain weight (334.08 g) and grain yield (3154.43 g) were obtained from plots receiving P2O5 @ 200 kg ha -1. Similarly, seed rate @ 60 kg ha -1 gave comparatively higher economic yield. Hence P2O5 @ 200 kg ha -1 and seed rate @ 60 kg ha -1 proved to be the best fertilizer and seed rate among all the treatments.
Clock Estimation for Long-Term Synchronization in Wireless Sensor Networks with Exponential Delays
Qasim M. Chaudhari,Erchin Serpedin
EURASIP Journal on Advances in Signal Processing , 2007, DOI: 10.1155/2008/219458
Abstract: Although the existing time synchronization protocols in wireless sensor networks (WSNs) are efficient for short periods, many applications require long-term synchronization among the nodes, for example, coordinated sleep and wakeup modes, and synchronized sampling. In such applications, experiments have shown that even clock skew correction cannot maintain long-term clock synchronization and a quadratic model of clock variations can better capture the dynamics of the actual clock model involved, hence increasing the resynchronization period and conserving significant energy. This paper derives the maximum likelihood (ML) estimator for all the clock parameters in a two-way timing exchange model with exponential delays. The same estimation procedure can be applied to one-way timing exchange models with little modification.
A System of Farming Response of Rice to Zinc Fertilizer in Calcareous Soils of D. I. Khan
M. Umar Khan,M. Qasim,M. Jamil
Asian Journal of Plant Sciences , 2002,
Abstract: Response of rice variety IRRI-6 to various levels of zinc was studied in a pot culture experiment. Zinc was applied at the rate of 0, 5, 10 and 15 kg ha-1 in the form of ZnSO4 along with a basal dose of 175 kg N, 110 kg P2O5 and 100 kg K2O ha-1. The results showed that all the yield and yield components of rice increased significantly with increasing level of zinc fertilizer. However, significantly maximum plant height, average number of productive tillers per plant, panicles per plant, spikelets per panicle, 1000 paddy weight and grain and straw yield were obtained where Zn was applied at the rate of 10 kg ha-1 which was statistically at par with the treatments receiving Zn at the rate of 15 kg ha-1 except number of spikelets per panicle of rice.
Effect of Different Levels of Zinc on the Extractable Zinc Content of Soil and Chemical Composition of Rice
M. Umar Khan,M. Qasim,M. Jamil
Asian Journal of Plant Sciences , 2002,
Abstract: A pot experiment was carried out to study the effect of different levels of Zn viz., 0, 5, 10 and 15 kg ha-1 along with a basal dose of NPK (175 kg N, 110 kg P2O5 and 100 kg K2O ha-1) on the Zn content of soil and chemical composition of rice Zn content of soil, leaves, roots, grain and straw of rice increased significantly with an increase in Zn fertilization. Similarly, significant maximum N and K content of rice grain and straw were found where zinc was applied @ 15 kg Zn ha-1. However, a decrease in its P concentration was found with
Utilization of Sewage Sludge as Organic Fertiliser in Sustainable Agriculture
M. Jamil,M. Qasim,M. Umar
Journal of Applied Sciences , 2006,
Abstract: A field experiment was conducted to study the effect of addition of different levels of domestic sewage sludge on the soil properties and yield of wheat crop. Addition of sewage sludge raised soil pH, increased organic matter, ECe, NPK, Ca+Mg and trace metals (Fe, Cu, Mn and Zn) with its increasing levels. Different treatments of sludge also increased the yield and yield attributing components as compared to untreated (control) treatments. Significantly maximum plant height (107 cm), number of tillers (433 m-2) and straw yield (9.82 t ha-1) were obtained where 80 t ha-1 sewage sludge was applied while spike length, number of productive tillers m-2, number of grains spike-1, 1000-grain weight and grain yield were maximum in the treatments amended with 40 t ha-1 of sewage sludge. The study indicates that sludge application at the rate of 40 t ha-1 can enhance economic yield of wheat and also improve soil productivity.
Effect of Sewage Sludge on the Growth of Maize Crop
M. Qasim,Naheeda Javed,Himayatullah,M. Subhan
Journal of Biological Sciences , 2001,
Abstract: Sewage sludge application had significantly effected all parameters of maize crop except germination percentage. Maximum Shoot length, Number of leaves per plant, Leaf area, Plant height, Root length, Shoot dry weight and Root dry weight of maize crop were obtained where sewage sludge was applied @ 10-30 ton ha-1. It was recommended that application of sewage sludge at the rate of 20 or 30 ton ha -1 will have favorable effect on the maize crop under the agro-climatic conditions of D.I.Khan.
Physiochemical Changes in Tissue of Edible Mussels Perna Viridis at Refrigerator Temperature (7±2°C)
Reshma Zamir,Rashida Qasim,M. Atiquellah Khan
Pakistan Journal of Biological Sciences , 1999,
Abstract: Quality of stored mussels tissue depends on the temperature and storage time. Investigations on factors responsible for spoilage of mussel (perna viridis) meat in refrigerator (7 ±2 °C) in term of biochemical indices indicated that Trimethyle amine (TMA), Total volatile basis (TVB), water content and pH significantly increased (p<0.001) with storage time. Results concluded that mussel meat could be preserved for 4 days up to acceptable at refrigerated temperature.
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