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Search Results: 1 - 10 of 7856 matches for " Amjad Khan "
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A Review of Structure Activity Relationship of Amiodarone and Its Derivatives  [PDF]
Moiz A. Siddiqui, Amjad Khan, Mehreen Zaka
Open Journal of Medicinal Chemistry (OJMC) , 2016, DOI: 10.4236/ojmc.2016.62003
Abstract: Structure Activity Relationship forms the basis of Rational Drug Design in the circles of pharmaceutical and medicinal chemistry. Appropriate knowledge of functional outcomes of structural modifications is crucial in conferring desired pharmacological properties to a chemical compound. Amiodarone is a classical antiarrythmic agent with a long list of adverse effects. This article attempts to review the structure activity relationship of some of the homologues of amiodarone in order to determine the most clinically desirable molecule.
Case Report: Mediastinal Ganglioneuroma Presented as Chronic Diarrhea in a Young Saudi Girl  [PDF]
Khaled I. Alqoaer, Muflih Albalawi, Mohammed S. Alnoaiji, Amjad Khan
International Journal of Clinical Medicine (IJCM) , 2014, DOI: 10.4236/ijcm.2014.57057

Ganglioneuromas (GN) are rare, benign neurogenic tumors that arise from sympathetic ganglia. They are often asymptomatic. However, in rare cases, they may secrete catecholamines, vasoactive intestinal polypeptides (VIP), or androgenic hormones and manifest with flushing, symptoms of catecholamine excess or chronic diarrhea. We report a young Saudi girl with chronic secretory diarrhea, severe hypokalemia and abdominal distension. After an extensive work up, a well-defined hypodense heterogeneous mediastinal mass was noted in radio imaging. A complete recovery was seen after surgical removal of that mediastinal mass which turned to be a ganglioneuroma.

Exchange Rate Volatility in Pakistan and Its Impact on Selected Macro Economic Variables (1980-2014)  [PDF]
Madeeha Zamir, Amjad Amin, Sami Ullah, Salim Ullah Khan
iBusiness (IB) , 2017, DOI: 10.4236/ib.2017.94012
Abstract: Among the developing countries, Pakistan experienced a unique downward trend in rupee value and frequent transitions in the exchange rate systems. These distinctive features make Pakistan economy an interesting case study for the empirical examination of the rupee exchange rate and its role in the monetary policy and macroeconomic performance. The purpose of the present study is to find out which of the macroeconomic indicators has led the Pak-rupee exchange rate volatility during the study period. Furthermore, the effect of the exchange rate volatility on foreign exchange reserves and selected macroeconomic variables has also been studied in the framework of a regression approach. Time series annual data covering the period of 1980 to 2014 has been used for the empirical analysis. Augmented Dickey Fuller test has been used for checking the unit root in the data. Ordinary Least Squares method is used for the estimation of regression equations. For avoiding the problems of spurious relationship between the variables and series implications for the standard errors, various diagnostic tests have been applied. Initially study has taken exchange rate as dependent variable and some selected macroeconomic variables as independent variables. The result show that exchange rate has negative relationship with the variables such as inflation (INF), foreign direct investment (FDI), imports (IMP) and positive with
Varietal Performance of Maize Against Stem Borer (Chilo partellus Swin.).
Said Mir Khan,Muhammad Amjad
Pakistan Journal of Biological Sciences , 2000,
Abstract: The results reveal that sarhad white was found the least susceptible on the basis of number of dead hearts and percent infestation compare to the other three tested varieties. Sarhad white variety was also found significantly better than Kisan, Pirsabak experimental variety No.1 and Pirsabak experimental variety No. 4 on the basis of average plant height, weight of stalk (kg/plot), average number of cobs/plant, weight of cobs (kg/plot), and weight of grains (kg/plot).
Performance Analysis of Random Linear Network Coding in Two-Source Single-Relay Networks
Amjad Saeed Khan,Ioannis Chatzigeorgiou
Computer Science , 2015,
Abstract: This paper considers the multiple-access relay channel in a setting where two source nodes transmit packets to a destination node, both directly and via a relay node, over packet erasure channels. Intra-session network coding is used at the source nodes and inter-session network coding is employed at the relay node to combine the recovered source packets of both source nodes. In this work, we investigate the performance of the network-coded system in terms of the probability that the destination node will successfully recover the source packets of the two source nodes. We build our analysis on fundamental probability expressions for random matrices over finite fields and we derive upper bounds on the system performance for the case of systematic and non-systematic network coding. Simulation results show that the upper bounds are very tight and accurately predict the decoding probability at the destination node. Our analysis also exposes the clear benefits of systematic network coding at the source nodes compared to non-systematic transmission.
Performance of mid Duration Soybean as Affected by Various Pre-emergence Herbicides
Amjad Khan,M. Rahim,Ehsanullah,Muhammad Khan
Pakistan Journal of Biological Sciences , 2000,
Abstract: Eight different weed species were identified to be present among which jungle grass and purple nutsedge were the most abundant weeds during both of the kharif seasons. All of the herbicides including hand weeding eradicated completely the crow footgrass and purslane from the treated plots. On the contrary, purple nutsedge was the most tolerant weed and non of the herbicides was potent enough to eliminate it completely. For soybean, days to flowering and maturity, plant height and seed/pod were not affected significantly by different herbicides as compared to hand weeding and no-weeding control. However, plant population, number of pods/plant and yield were significantly affected. All the treated plots including hand weeding produced 47 to 133 % more yield as compared to no-weeding control.
Performance of Exotic Lentil Varieties under Rainfed Conditions in Mingora (NWFP) Pakistan
Ayub Khan,M. Rahim,Amjad Khan
Journal of Biological Sciences , 2001,
Abstract: Coefficient of variation, in 25 exotic lentil genotypes were very low for maturity (days) (1.16%), flowering (4.36%) and seed yield plant -1 (10.22%) but high for pod plant -1 (44.03%), seed pod -1 (22.84%), biological yield (21.48%) and plant height (cm) (20.75%). Seed yield had significantly positive correlation with pod plant -1, branches plant -1, and seed pod -1. Flowering and maturity revealed weaker but positive correlation with seed yield, while biological yield showed negative correlation with seed yield. Pods plant -1 and seed pod -1 can be used while selecting lentil varieties for this zone. Plant height also showed very interesting correlation: reducing plant height meant more seeds pod -1 and biological yield. However, early maturing, shorter varieties with more number of branches plant -1 and seed pod -1 may be considered an index for selection in the germplasm under study for yield.
Effect of Arbuscular Mycorrhiza Fungal Inoculation with Compost on Yield and Phosphorous Uptake of Berseem in Alkaline Calcareous Soil  [PDF]
Bismillah Jan, Amjad Ali, Fazli Wahid, Syed Noor Muhammad Shah, Asif Khan, Farmanullah Khan
American Journal of Plant Sciences (AJPS) , 2014, DOI: 10.4236/ajps.2014.59150

An experiment was conducted in pots under natural conditions in alkaline calcareous soil to determine berseem (Trifolium alexandrium) yield and P uptake as affected by Arbuscular mycorrhizal fungi (AMF) inoculation with compost prepared from fresh animal dung and rock phosphate. Data indicated that berseem shoot and roots yields increased significantly (P ≤ 0.05) by inoculation of indigenous mycorrhiza (AMF-I) and half dose of compost. Shoot yield increased as 98% and 76% roots yield as 60% and 52% over control and N and K fertilizers. Maximum and significantly (P ≤ 0.05) increased plant N and P uptake by berseem was observed in the treatment inoculated by commercial mycorrhiza (AMF-II) with full dose of compost followed by the inoculation of AMF-II with half dose of compost. Plants uptake of Cu, Mn and Fe was improved significantly (P ≤ 0.05) by the inoculation of AMF-II with half dose of compost, while Zn uptake was increased in the treatment of AMF-II inoculation with full dose of compost. Maximum and significantly (P ≤ 0.05) increased soil spores density of AMF as 27 spores per 20 g soil was noted by inoculation of AMF-I with half dose of compost, while maximum roots infection intensity in berseem was observed by the inoculation of AMF-I with full dose of compost. Results suggest that inoculation of AMF with compost has potential to improve berseem yields and plants nutrients uptake under given soil conditions.

Genetic basis of some quantitative traits in upland cotton (Gossypium hirsutm L.)
Muhammad Amjad Ali,Amjad Abbas,Muhammad Younas,Tariq Manzoor Khan
Plant Omics , 2009,
Abstract: Five cotton cultivars were crossed in a complete diallel to study the inheritance of different polygenic traits. Genotypic differences were found to be significant (P<0.01) for all the characters. Adequacy tests disclosed that data of all the parameters were fully adequate for genetic analysis except bolls per plant, staple length, fibre strength, and fibre fineness, which was partially or not adequate. Additive component of genotypic variation (D) was significant and predominant for plant height, sympodia per plant, staple length and fibre strength, while dominance effects (H1 and H2) were main controlling factors for of monopodia per plant, number of bolls, lint percentage and seed cotton yield. More dominant genes were revealed in the parents for sympodia per plant, lint percentage and seed cotton yield. The values of heritability in narrow sense (h2 n.s) and H2/4H1 demonstrated asymmetrical and unequal distribution of dominant genes in parents for all characters. Plant height, sympodia per plant, staple length and fibre strength exhibited high narrow sense heritability (h2 n.s) due to the presence of additive gene action, whereas, monopodia per plant, number of bolls, lint percentage and seed cotton yield possessed low heritability. The genetic analysis suggested that plant height, sympodia per plant, staple length and fibre strength could be improved through sib family, pedigree and progeny selection, while exploitation of heterosis would be necessary to attain the genetic advancement in monopodia per plant, number of bolls, lint percentage and seed cotton yield.
Yield Response of Groundnut Genotypes under the Sub-mountainous Conditions of Malakand Division (NWFP), Pakistan
Ayub Khan,M. Rahim,Amjad Khan,M.Idrees Khan
Pakistan Journal of Biological Sciences , 2001,
Abstract: Field experiments on 12 groundnut genotypes were carried out at three different locations of Malakand Division. Significant differences were noted for maturity duration, pod plant -1, kernel pod -1, shelling%, 100-kernel weight and pod yield, among the locations, genotypes and location X genotype interaction. Maturity was earlier at Cheena, with minimum pod plant -1 and kernel pod -1. Among the genotypes, PG-931 and PI-338337 were earliest in maturity. PG-931 also had maximum pods plant -1 whereas PI-338337 had maximum kernel pod -1. 100-kernel weight was higher at Cheena. PG-951 (74.91%) and PG-864 (74.12%) produced maximum shelling % at all the locations. The highest pod yield of 3167 Kg ha -1 and 2750 kg ha -1 were recorded at Mingora and Cheena, respectively. Among the genotypes, PG-931 produced the maximum yield of 3685 Kg ha -1, whereas minimum yield of 1583 kg ha -1 was recorded for the check variety, Swat Phalli-96.
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