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Search Results: 1 - 10 of 543276 matches for " M.R. Tadayon "
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Effect of Supplemental Irrigation and Amount of Available Water on Yield, Yield Components and Physiological Characteristics of Two Rainfed Wheat Cultivars
M.R. Tadayon,Y. Emam
Journal of Science and Technology of Agriculture and Natural Resources , 2008,
Abstract: Photosynthesis and wheat grain yield responses to supplemental irrigation with different amount of applied water under dryland conditions were investigated. Therefore, a two-year field experiment was conducted research farm of College of Agriculture, Shiraz University during 2004-2005. Five levels of irrigation including dryland conditions, irrigation at stem elongation, booting, flowering and grain filling were main plots and two wheat cultivars: Agosta and Fin-15 were subplots, and three rates of nitrogen including zero, 40 and 80 kgha-1 were sub sub-plots. The results showed that in both years, photosynthetic rate, stomatal conductance, substomatal CO2 concentration and transpiration rate, were significantly higher under irrigation at stem elongation stage compared to other supplemental irrigation treatments. In all of the four supplemental irrigation treatments, photosynthetic rate, stomatal conductance, substomatal CO2 concentration and transpiration rate decreased with decreasing the amount of applied water to each plot. In both years, the highest grain yield was obtained from supplemental irrigation at stem elongation stage, and the lowest yield was harvested at dryland conditions. The highest photosynthetic parameters, yield and yield components were obtained from interaction of supplemental irrigation at stem elongation stage × Fin-15 and 80 kg N ha-1 in both years. The supplemental irrigation in 2004 and 2005 increased the grain yield 200 and 221 percent, respectively, compared to dryland conditions. Thus, supplemental irrigation at sensitive stem elongation stage could affect significantly wheat grain yield of rainfed wheat cultivars and provision of adequate water for a supplemental irrigation at the appropriate growth stage could double the grain yield of rainfed wheat.
Short Term Effect of Consolidation on Profitability of Nigerian Banks
M.R Sanni
African Research Review , 2010,
Abstract: Has the 2006 consolidation of banks in Nigeria led to a significant change in the profitability [Earning Per Share (EPS)] of the banks? This paper examined the EPS of 13 out of the 25 post consolidation ‘mega’ banks. The banks examined are those that fairly retained their identities before and after the consolidation exercise. The three-year (2003-2005) pre consolidation EPS mean of the banks was compared with the three-year (2006-2008) post consolidation period. Using descriptive statistical method, the combined EPS of the banks changed but not significantly at 5% significant level when a paired sample t-test statistical method was used. Three of the banks however stood out. The change (an increase) in the EPS of two of them is significant while the change (a decrease) in the third one is also significant not only at 5% but at 1%. The findings here confirm the existing controversy on whether or not mergers or acquisitions lead to improved profitability. What is however clear is that barring any effect of the present global economic meltdown; it may take some time for the EPS of most of the banks to change significantly. Key Words: EPS Profitability Consolidation
Information and communication technology products: their gains and pains on Nigerian banking system
M.R Sanni
African Research Review , 2009,
Abstract: Year 2006 witnessed a banking revolution in Nigeria as the minimum paid up share capital of Nigerian banks was increased from N2 billion to N25 billion. With it came consolidation and stiff competition among the emerging “mega” banks resulting into investments in ICT. This paper considers the positive as well as the negative sides of some ICT products like ATM, e-banking, e-payment and e-commerce among others. It compares the investment by banks in ICT in the last three-years with the volume and value of banking transactions occasioned by such investment. It also considers savings from forgeries and frauds and concludes that the gains from ICT banking products far outweigh their shortcomings.
Oscillatory Gas Flow in a Circular Nanotube
M.R. King
The Open Nanoscience Journal , 2007, DOI: 10.2174/1874140100701010001]
Abstract: Gas flow through nanoscale conduits shows distinctly different physics compared to flow at the macroscale. One of the first manifestations of this is the appearance of wall slip. Here we consider the oscillatory flow of an incompressible Newtonian gas through a circular nanotube, with first order wall slip due to rarefaction. It was found that the major effect of wall slip at lower oscillation frequencies is to alter the instantaneous velocity profiles from Poiseuille-like to more plug-like, with an overall enhancement to the fluid velocity magnitude. However, at higher frequencies the enhancement to velocity magnitude due to wall slip is greatly diminished, and rarefaction introduces a region of backflow near the centerline of the nanotube. These flow characteristics may have important implications for the design of various practical applications of unsteady gas flow through nanoscale conduits, from fuel cell membranes to gas-powered nanomachines constructed from carbon nanotubes.
First Principles Studies of the Effect of Nitrogen Impurities on the Energy Gap of Rutile TiO2-xNx by Pseudopotential Approaches
M.R. Benam
Journal of Engineering and Applied Sciences , 2012, DOI: 10.3923/jeasci.2011.18.20
Abstract: We have studied the electrical properties of rutile TiO2-xNx compound which x is the fraction of Ni impurities and was chosen to be 0.0625, 0.125, 0.25 and 0.5. In the calculations, we have adopted a pseudopotential and supercell approach based on the Density Functional Theory (DFT) with GGA approximation for the Exchange-correlation potential as implemented in SIESTA code. We have calculated the band structure and Density of State (DOS) and therefore, the changes of the energy gap of this compound with nitrogen substitution in oxygen sites. The quality of the used pseudopotential was tested by comparing the calculated band structure and DOS using Full Potential Linear Augmented Plane Wave (FP-LAPW) and pseudopotential methods. The result shows that the energy gap of TiO2-xNx has decreases considerably due to the appearing of the N-2p orbitals in the bottom of the energy gap which is in good agreement with the recent experimental researches about the red shift of the threshold absorbance frequency of this compound which has made it an interesting photocatalysis in the visible spectrum of the solar radiation.
The role of hormone therapy in the treatment of osteoporosis
M.R Davey
Journal of Endocrinology, Metabolism and Diabetes of South Africa , 2010,
Abstract: The concerns raised by the findings of the Women’s Health Initiative study resulted in many practitioners no longer considering the use of menopausal hormone therapy for the treatment of osteoporosis. Subsequent re-analyses of this study, recent publications on the use of lower doses and different modes of delivery of hormone therapy, and data suggesting that certain women will receive longer-term fracture prevention even with short-term use have resulted in a reappraisal of the use of oestrogen and oestrogen plus progestin therapy for the prevention and treatment of osteoporosis. These issues are discussed, and based on these more recent analyses it is suggested that menopausal hormone therapy could still be considered a first-line option for osteoporosis prevention and treatment in certain patients.
Urethroscopic Management of Iatrogenic Urethral Injuries
M.R Nikoobakht
Tehran University Medical Journal , 2005,
Abstract: Background: This study was conducted to evaluate results of urethroscopic management of iatrogenic urethral injuries due to gynecological operations. Materials and Methods: From November 2001 till November 2003, 12 iatrogenic urethral injuries which were managed with mean time 12 hours (Range= 6-72) after gynecological operations were included in this study. 3 months after urethroscopy and distending, patients were evaluated with IVP. Mean time of clinical follow up was 12 months (range= 4-29). Results: 7 patients with urethral stricture were found and considering fluoroscopy guided urethral dilatation with balloon in 2 of them, urethroscopy and distending was successful in 6 patients (85/7%). In 5 patients with complete dissection of urethra, urethroscopy and distending was successful only in 1 of them (20%). All patients were discharged after 24 hours and in follow up IVP after 3 months. Results were satisfactory in 6 of 7 patients. One of patients needed re-distending due to stricture. Conclusion: Urethroscopic approach as first step in management of iatrogenic urethral injuries seems reasonable and cost benefit, specially in ligating lesions.
RESTITUIRI
M.R. Diaconescu
Jurnalul de Chirurgie , 2005,
Abstract:
Korte mededeling: Enkele medische en natuurwetenschappelijke handschrifte in de Gemeentebibliotheek te Rotterdam
M.R. Wielema
Tijdschrift voor de Geschiedenis der Geneeskunde, Natuurwetenschappen, Wiskunde en Techniek , 1990,
Abstract:
Tussen Newton en Wolff: het Rotterdams genootschap Verscheidenheid en Overeenstemming, 1760-1790
M.R. Wielema
Tijdschrift voor de Geschiedenis der Geneeskunde, Natuurwetenschappen, Wiskunde en Techniek , 1990,
Abstract: Between Newton and Wolff: the Rotterdam Society Diversity and Unanimity, 1760-1790 In this article, which is based on newly discovered source material, both published and in manuscript, I have attempted to sketch the relation between Newtonian and Leibniz-Wolffian philosophy within the context of a little known Rotterdam society of amateur scientists and scholars, called 'Diversity and Unanimity', founded in 1760. It seems that the founding members of this society, Adolf Hendrik Hagedoorn and Lieve Kaas, in their endeavour to promote an encyclopedic view of philosophical and scientific knowledge among the learned public of Rotterdam, set themselves two tasks. One was to keep Newtonianism both religious and pure, that is to say, free it from hypothetical and non-experimental elements that could be dangerous to religion. The other was to combine Newtonian physics, where necessary, with Leibniz-Wolffian metaphysics. They even went so far as to give Leibniz precedence over Newton in some questions of natural philosophy, such as the theories of light and the simple elements of material bodies. This seems quite remarkable, considering the great influence Newton exercised on physics in the Netherlands in the eighteenth century, but it can be explained from the first task they set themselves: they rejected those physical theories that could not be confirmed experimentally and were hostile to natural religion. Instead, they adopted Leibniz-Wolffian doctrines which in their view were more sound, not only scientifically, but also religiously and metaphysically.
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