Browsing Academic by Title
Now showing items 4240-4259 of 25697
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Comparative Study of 11 Honey Samples Sold in Riyadh Saudi Arabia
( Qatar University , 2006 , Article)11 honey various samples commercially available in Saudi Arabia, were subjected to chemical, toxicological and bacteriological tests. The samples were checked for As and CN, presence of pollens, and for bacteria contamination. ... -
Comparative study of adaptive sliding mode and resonant controllers in fault tolerant five-phase permanent magnet synchronous motor drive
( Springer London , 2018 , Article)This paper proposes a new fault tolerant control strategy for a five-phase permanent magnet synchronous motor (PMSM) drive under single-phase open circuit condition. The loss of one phase causes problems such as disturbing ... -
Comparative study of Bacillus thuringiensis Cry1Ia and Cry1Aa delta-endotoxins : activation process and toxicity against Prays oleae
( Elsevier Inc. , 2010 , Article)Cry1Ia and Cry1Aa proteins exhibited toxicities against Prays oleae with LC(50) of 189 and 116 ng/cm(2), respectively. The ability to process Cry1Ia11 protoxin by trypsin, chymotrypsin and P. oleae larvae proteases was ... -
Comparative study of classical and fuzzy -regulator in five phase synchronous machine control with open phase
( IOS Press , 2018 , Article)Speed control of synchronous machines using Field Oriented Control (FOC) classically uses Proportional Integral (PI) or Integral Proportional (IP) regulators that allow to achieve satisfactory goals on the dynamics of speed ... -
A Comparative Study of High-gain Cascaded DC-DC Converter Topologies
( IEEE , 2022 , Conference Paper)DC-DC boost converters are utilized to step-up the voltage level to match a certain application requirement. Although Conventional boost converter is simple and easy to be implemented, it has a low boosting capability and ... -
A Comparative Study of High-intensity Rosuvastatin Versus Atorvastatin Therapy Post-acute Coronary Syndrome Using Real-world Data
( Elsevier , 2021 , Article)A high-intensity statin is recommended for the secondary prevention of cardiovascular diseases (CVD). However, real-world evidence of the effectiveness of rosuvastatin following acute coronary syndrome (ACS) is scarce. ... -
Comparative Study of Homogeneous and Heterogeneous Modelling of Water-Gas Shift Reaction with Macro-or Micro-kinetics
( Elsevier Ltd , 2016 , Conference Paper)This paper presents critical studies on water-gas shift reaction (WGSR) kinetic models as well as the modelling approaches of the reactor, in which the reaction is conducted - the packed-bed tubular reactor (PBTR). There ... -
Comparative study of organic and inorganic fertilizers on forage corn (Zea mays l.) Grown on two soil types
( Qatar University , 2001 , Article)Two pot experiments were conducted in 1995/96 and 1996/97 to investigate the interactive effects of organic and inorganic fertilizers applied to two soil types on the performance of corn (Zea mays L.). The soil types were ... -
Comparative Study of Periodic Review Policy and IoT Enabled Policy for the Domestic Waste Management
(2020 , Master Thesis)“Innovation is the difference between leaders and followers” said the famous Apple‟s CEO, Steve Jobs. The technological advancement was and will always be exploited into delivering a higher quality of life for communities. ... -
Comparative study of SBOAs on the tuning procedure of the designed SMPI controller for MIMO VSP/HVDC interconnected model
( Elsevier , 2021 , Article)This paper presents a new application of advanced SMPI controller for a newly introduced interconnected dynamic system with VSP based HVDC links for frequency control problem. This work presents an outgrowth of analysis ... -
A Comparative Study of Seigniorage: Egypt and Qatar
(2023 , Article)This study adopts the model of CB’s balance sheet and government budget identity developed by Klein & Neumann (1990) to investigate the question of “Will the effect of monetary seigniorage on CPI inflation and real GDP ... -
Comparative study of sliding mode control and vector control in a five-phase permanent magnet synchronous motor drive
( Institute of Electrical and Electronics Engineers Inc. , 2018 , Conference Paper)Different control strategies have been recently proposed. In this paper, two control techniques are compared in a five-phase permanent magnet synchronous motor drive (PMSM). The strategies being compared are based on the ... -
Comparative study of SMES in Dubai and south Korea
(2017 , Master Thesis)Gulf Cooperation Council (GCC) countries have enjoyed large amounts of oil revenues for their development and prosperity over past fifty years or so. However, since the dramatic drop in oil prices in 2014, all the GCC ... -
Comparative study of the effect of oleuropein and hydroxytyrosol rich extracts on the reproductive toxicity induced by bisphenol A in male rats: biochemical, histopathological, and molecular analyses
( Springer , 2023 , Article)Bisphenol A, or BPA, goes into the composition of a large number of products including sunglasses, infant’s feeding bottles, receipts, or food packaging. Nowadays, there is a growing evidence that BPA may be at the origin ... -
A comparative study of the effects of clumping, substrate, light, depth of burial and soil moisture upon the germination of seeds of weeds and crops grown in the sudan gezira.
( Qatar University , 1985 , Article)The influence of the number of seeds per clump upon germination of oryza sativa L., Gossypium hirsutum L., Brachiaria eruciformis (Sm.) Griseb, Dinbera retroflexa (Vahl) Panz. and Echinochloa colonum (L.) Link was investigated ... -
A comparative study of the mechanical properties of low Density polyethylene (ldpe)
( Qatar University , 1997 , Article)Mechanical properties of engineering polymers which are the most important properties for design and construction purposes are diverse. This has been proved by investigation tensile properties of different grades of LDPE ... -
A comparative study of the treatment of ethylene plant spent caustic by neutralization and classical and advanced oxidation
( Academic Press , 2015 , Article)The treatment of spent caustic produced from an ethylene plant was investigated. In the case of neutralization alone it was found that the maximum removal of sulfide was at pH values below 5.5. The higher percentage removal ... -
Comparative Study on Beneficial Effects of Hydroxytyrosol- and Oleuropein-Rich Olive Leaf Extracts on High-Fat Diet-Induced Lipid Metabolism Disturbance and Liver Injury in Rats
( Hindawi , 2020 , Article)Oleuropein and hydroxytyrosol, as major compounds of olive leaves, have been reported to exert numerous pharmacological properties, including anticancer, antidiabetic, and anti-inflammatory activities. The purpose of this ... -
A comparative study on chemical profiles and biological activities of different extracts of three Verbascum species from Turkey: In vitro, in silico and network pharmacological approaches
( Elsevier , 2023 , Article)The present study aimed to evaluate the antioxidant and enzyme inhibition properties of aerial part of Verbascum cheiranthifolium Boiss. V. myriocarpum Boiss. & Heldr. and V. pyroliforme (Boiss. & Heldr.) Kuntze as well ... -
Comparative Study on Gas-Sensing Properties of 2D (MoS2, WS2)/PANI Nanocomposites-Based Sensor
( MDPI , 2022 , Article)NH3 is a highly harmful gas; when inhaled at levels that are too high for comfort, it is very dangerous to human health. One of the challenging tasks in research is developing ammonia sensors that operate at room temperature. ...
