OALib Journal期刊

ISSN: 2333-9721




2018 ( 5 )

2017 ( 20 )

2016 ( 25 )

2015 ( 143 )


匹配条件: “Sami Ullah Bhat” ,找到相关结果约3001条。
Primary Production Dynamics of Two Dominant Macrophytes in Wular Lake, a Ramsar Site in Kashmir Himalaya
Naseer Ahmad Dar,Aadil Hamid,Bashir Ahmad Ganai,Sami Ullah Bhat
Ecologia Balkanica , 2012,
Abstract: Growing season changes in the organic matter, organic carbon and chlorophyll content of the two dominant macrophytes, Nymphoides peltatum and Ceratophyllum demersum of Wular Lake, a Ramsar Site in Kashmir Himalaya were analysed during March- November 2011. The content of organic matter and organic carbon for Nymphoides peltatum were 114.1 g m-2 and 53.1 g C m-2 and Ceratophyllum demersum were 57.0 g m-2 and 26.4 g C m-2. Chlorophyll A (Chl a) and chlorophyll A+B (Chl a+b) pigments ranged from 1.75 mg g-1 (Chl a) and 2.1mg g-1 (Chl a+b) in Nymphoides peltatum to 4.41 mg g-1 (Chl a) and 5.69 mg g-1 (Chl a+b) in Ceratophyllum demersum. In full leaf out, the latter aquatic plants exceeded 15-20% coverage of the open water surface.Ceratophyllum demersum and Nymphoides peltatum achieved maximum growth in June and August respectively, but significant differences in their growth dynamics was observed. At the end of the vegetation period, these plants sink to the bottom and decompose.
Effect of nitrogen on achene protein, oil, fatty acid profile, and yield of sunflower hybrids Efecto de nitrógeno en la proteína, aceite, y perfil de ácidos grasos del aquenio y rendimiento de híbridos de girasol
Amjed Ali,Sami Ullah
Chilean Journal of Agricultural Research , 2012,
Abstract: Seed yield and achene oil yield are the main determinants for N application rates rather than seed composition. Nitrogen plays a critical role in producing unsaturated fatty acids (oleic and linoleic acids), which are the main factors determining sunflower oil quality (Helianthus annuus L.). Studies were conducted on the effect of N fertilization on seed yield, achene oil yield, and quality parameters of sunflower hybrids for two successive years (2010 and 2011) in a split plot arrangement under a randomized complete block design. The hybrids (Hysun-33 & S-278) and N levels (0, 75, 150, and 225 kg ha-1) were allotted in main and sub-plots, respectively. Increasing N levels resulted in steady increases in yield, protein contents and linoleic acid, whereas oil contents and percentage of oleic acid responded negatively during both years. At the same time, crop oil yield was positively related to increased N supply with higher achene yield (AY). Palmitic acid varied from 5.27 to 6.42 % and stearic acid ranged from 2.27 to 2.95%. Hybrid S-278 exhibited significantly (P < 0.05) higher AY (3380 kg ha-1), oil content (42.11%) than Hysun-33 (2968 kg ha-1 and 40.75%, respectively), while the opposite was true for protein content. Oil yield varied in response to N fertilizer, with a range of 34 to 37% providing the best quality traits in both seasons. Parece racional que el rendimiento de semilla y rendimiento de aceite de aquenio sigan siendo el foco determinante para tasas de aplicación de N en lugar de la composición de la semilla. El N parece jugar un papel imprescindible en la proporción de ácidos grasos insaturados (ácidos oleico y linoleico), factor principal que determina el aceite de girasol (Helianthus annuus L.). Los estudios fueron realizados para evaluar el efecto de la fertilización N en el rendimiento de semilla, rendimiento de aceite de aquenio, y parámetros de calidad de híbridos de girasol por 2 anos sucesivos (2010 y 2011) en un diseno de bloques completos al azar con arreglo de parcelas divididas. Los híbridos (Hysun-33 y S-278) y niveles de N (0, 75, 150 y 225 kg ha-1) fueron asignados a parcelas principales y sub parcelas, respectivamente. Niveles crecientes de N aumentaron de manera estable el rendimiento, contenidos de proteína y de ácido linoleico en el aceite, donde contenidos de aceite y porcentaje de ácido oleico respondieron negativamente durante ambos anos. Al mismo tiempo, el rendimiento de aceite del cultivo permaneció positivamente relacionado al gran suministro de N dando la ventaja de mayor rendimiento de aquenio (AY). El ácido p
The trend of hospital accreditation in Saudi Arabia
Ahmad Z. Qureshi,Sami Ullah,Rubina Ullah
Saudi Medical Journal , 2012,
Abstract: [No abstract available]
Management and Employee Perspective on Diversity: A Review Essay
Muhammad Ali Gondal,Sami Ullah
Journal of Asian Scientific Research , 2011,
Abstract: The interest of employers about the issue of managing workforce diversity has grownrapidly. A number of articles and books have been written on this issue in almost allparts of the world but yet the findings of the researches are fragmented with respect todefinition and ways to manage diversity. This review article on workforce diversity isarranged with respect to definition of diversity, managerial and employee perspectiveon diversity, diversity training programs, and the causes of failure of diversity trainingprograms. Articles and books covering these aspects of diversity are reviewed in thisregard. It is found that disparity in the managerial and employees perspective about thediversity is the main factor behind the failure of diversity training conducted indifferent parts of the world. Further it was found that the successful achievement of theobjectives of diversity training programs, employers should incorporate the opinion ofemployee representatives.
Correlation and Causality between Inflation and Selected Macroeconomic Variables: Empirical Evidence from Pakistan (1990-2012)  [PDF]
Mehwish Nawaz, Muhammad Naeem, Sami Ullah, Salim Ullah Khan
iBusiness (IB) , 2017, DOI: 10.4236/ib.2017.94011

Inflation is regarded as one of the most chronic problems in Pakistan and the recent surge of inflation (10.8) in consumer price index is a matter of serious concern in the economy [1]. Inflation imposes high cost on economies and societies; disproportionately hurts the poor and fixed income groups, creates uncertainty throughout the economy and undermines macroeconomic stability. It also results in inefficient resource allocation and hence reduces potential economic growth. High inflation has always penalized the poor. Lowering inflation therefore, directly benefits the low and fixed income groups. The present study focuses to examine the impact of various macroeconomic variables on inflation in Pakistan and to find their correlation and causal relationship with economic and econometric criterion by using time series data over the period of 1990 to 2012. To achieve this objective, regression analysis, correlation coefficient and granger causality test are used. Results from regression analysis indicate that money supply, government expenditure, government revenue, foreign direct investment and gross domestic product have positive impact on inflation in Pakistan, while interest rate shows negative impact. Correlation analysis confirms that there exists a positive association of inflation with money supply, government revenue, interest rate, foreign direct investment, gross

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
Effect of Inorganic Fillers on Thermal Performance and Char Morphology of Intumescent Fire Retardant Coating
W. Farhana Mohamad,Faiz Ahmad,Sami Ullah
Asian Journal of Scientific Research , 2013,
Abstract: An intumescent fire retardant coating is a substance when exposed to fire, it expands many time of its thickness forming as insulating layer of char which is strong enough to protect steel structure from fire and retain the structural integrity. Intumescent fire retardant coating has been developed by using Ammonium Polyphosphate (APP), Expandable Graphite (EG), Melamine (MEL), Boric Acid, Bisphenol A (BPA) and polyamide amine as a curing agent. Thus, local inorganic fillers which are alumina (Al2O3), aluminum trihydrate-ATH (Al (OH)3) and fumed silica added in the fire retardant materials. The main objective of this paper is to investigate the effect of local inorganic fillers on residual weight and char morphology of intumescent fire retardant coating. Intumescent fire retardant coating with addition of alumina fillers show greater residual weight and better char morphology.
To Study the Effect of Aluminium Trihydrate and Fumed Silica on Intumescent Fire Retardant Coating
Faiz Ahmad,Sami Ullah,Muhammad Syahmi Hamizol
Journal of Applied Sciences , 2012,
Abstract: Intumescent fire retarding coatings are designed to insulate the substrate under the action of fire. In this research to study the effect of Aluminium Trihydrate (ATH) and Fumed Silica (FS) on Expandable Graphite (EG) Intumescent Fire Retardant Coating (IFRC). The IFRC was based on EG, Ammonium Poly Phosphate (APP) as a acid source, melamine (MEL) as a blowing agent, Boric Acid (BA) as additive, ATH, FS as inorganic fillers and bisphenol. A epoxy resin BE-188 (BPA) was used as a binder with Hardener H-2310 polyamide amine. A range of different formulations were developed to study the char expansion, morphology of char and thermal properties of the IFRC. The formation of the final charring layer and their morphological structures was studied by Scanning Electron Microscopy (SEM). Char composition was determined by X-Ray Diffraction (XRD) technique. Thermogravimetric Analysis (TGA) was used to study the thermal stability of coating. Shear test was used to determine the bonding strength. IFRC with ATH give a better performance than fumed silica with 4 wt.% of ATH gives the best performance than others formulation in term of char expansion heat shielding, char residual weight and boding strength.
An Analysis of Household Saving and Investment Behavior among Different Income Groups in Urban Area of District Peshawar  [PDF]
Humaira Syed, Shaheen Nigar, Sami Ullah
iBusiness (IB) , 2017, DOI: 10.4236/ib.2017.94013
Abstract: The author conducted a study to analyze the saving and investment behavior among different income groups of the urban households of Hayatabad, Peshawar. A sample of 201 respondents from different phases was interviewed. The proportional allocation method was used to divide sample households according to the plot size. The findings showed that the level of literacy was 97.51% in the study area whereas the employment status of the households was 99.5%. The average household size was 20.5% with an average monthly income of Rs. 87,333. Average household saving was Rs.12,900/month and average investment was Rs.7649/month. The author concluded that households saving and investment over there are affected by a number of variables like income, education, employment status, the number of dependents, assets etc. The study recommended that more employment opportunities should be created to minimize the negative impact of dependents on household saving and investment. Secondly, high expenses of children’s education could be reduced by providing low-cost education; as a result, a large portion of income could be saved and can be invested further. Moreover, risk should be minimized to motivate people to invest in different fields.
Phenyl N-cyclohexylcarbamate
Durre Shahwar,M. Nawaz Tahir,Naeem Ahmad,Sami Ullah
Acta Crystallographica Section E , 2010, DOI: 10.1107/s1600536809050806
Abstract: In the title compound, C13H17NO2, the dihedral angle between the benzene ring and the basal plane of the cyclohexyl ring is 49.55 (8)°. In the crystal, molecules are linked by N—H...O hydrogen bonds, forming chains propagating in [010].

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