تصفح Research Units حسب العنوان
السجلات المعروضة 2400 -- 2419 من 4677
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Joint replenishment model for multiple products with substitution
( Elsevier Inc. , 2016 , Article)We extend the classical economic order quantity model to address the joint replenishment of multiple products under substitution. The proposed model optimizes ordering quantities for each product under substitution effects ... -
Jointly optimized ensemble deep random vector functional link network for semi-supervised classification
( Elsevier Ltd , 2022 , Article)Randomized neural networks have become more and more attractive recently since they use closed-form solutions for parameter training instead of gradient-based approaches. Among them, the random vector functional link network ... -
A jojoba (Simmondsia chinensis) seed cake extracts express hepatoprotective activity against paracetamol-induced toxicity in rats
( Elsevier , 2022 , Article)This study aimed to investigate the hepatoprotective activity of jojoba seed cake extracts against an acute paracetamol (PC) intoxication. Two aqueous extracts from jojoba (Simmondsia chinensis) seed cake, a simmondsin-rich ... -
Karyotype of Palaemon khori (Decapoda:Palaemonidae)
( Universite de Paris VI , 2015 , Article)The diploid number and karyotype of the palaemonid shrimp Palaemon khori (Decapoda: Palaemonidae) were determined for the first time, presenting 2n = 96 and comprising 26 metacentric, 7 submetacentric, 12 subtelocentric ... -
Key applications and potential limitations of ionic liquid membranes in the gas separation process of CO2, CH4, N2, H2 or mixtures of these gases from various gas streams
( MDPI AG , 2020 , Article Review)Heightened levels of carbon dioxide (CO2) and other greenhouse gases (GHGs) have prompted research into techniques for their capture and separation, including membrane separation, chemical looping, and cryogenic distillation. ... -
Key determinants of SMEs’ export performance: a resource-based view and contingency theory approach using potential mediators
( Emerald Publishing Limited , 2020 , Article)Purpose: Various barriers discourage small and medium-sized enterprises (SMEs) from entering or expanding their export activities in the international markets, especially SMEs in emerging markets. The purpose of this study ... -
Key Issues for Long Term Climate Policy Design in Gulf Countries with Focus on Qatar
( Gulf Studies center - College of Arts & Sciences - Qatar University , 2019 , Conference Paper)We analyze the challenges and options of designing an efficient global climate policy for GCC countries. We review the exposure of GCC countries to climate risks and the mitigation and adaptation options at their disposal. ... -
Keynote Speech by Dr. Syed Farid Alatas on Contemporary Significance of Ibn Khaldon
( Ibn Khaldon for Humanities and Social Sciences Center - Qatar University , 2019 , Video)The origin of the video is the keynote of Speaker Prof. Syed Farid Alatas at the International Symposium on Sociology and the Question of Indigenization held by the Ibn Khaldun Center on October 26, 2019 This video ... -
Kinetic and thermodynamic investigation of CO2 adsorption-desorption on polyethyleneimine - Mesoporous silica
( TechConnect , 2016 , Conference Paper)Two CO2 solid sorbents based on polyethyleneimine, PEI (432 and 10k) impregnated into mesoporous silica (MPS) foam were synthesized and tested for CO2 capture. At ambient pressure, the amount of CO2 captured by these solid ... -
Kinetic studies of POSS–DGEBA precursors derived from monoamine functional POSS using dynamic dielectric sensing and nuclear magnetic resonance
( John Wiley and Sons Inc. , 2018 , Article)Incorporation of pre‐reacted monofunctional polyhedral oligomeric silsesquioxane (POSS)–epoxy adducts dramatically improves dispersion of POSS in epoxy–amine networks. The relationship between reaction kinetics and mechanism ... -
Kinetic Study Of The Crystallization Of Lldpe And Wax In Lldpe/wax Phase-change Blends Used For Thermal Energy Storage
( Hamad bin Khalifa University Press (HBKU Press) , 2014 , Conference Paper)Phase-change materials are used to store and release energy through phase changes, be it melting and solidification processes or solid state phase transitions. Among a large number of phase-change materials are paraffin ... -
Kinetics of alkoxysilanes and organoalkoxysilanes polymerization: A review
( MDPI AG , 2019 , Article Review)Scientists from various different fields use organo-trialkoxysilanes and tetraalkoxysilanes in a number of applications. The silica-based materials are sometimes synthesized without a good understanding of the underlying ... -
Kinetics of alkoxysilanes hydrolysis: An empirical approach
( Nature Research , 2019 , Article)Alkoxysilanes and organoalkoxysilanes are primary materials in several industries, e.g. coating, anti-corrosion treatment, fabrication of stationary phase for chromatography, and coupling agents. The hydrolytic polycondensation ... -
Kinetics of CO 2 reaction with N-methyldiethanolamine and aminobutanol using stopped flow technique
( Institute of Physics Publishing , 2018 , Conference Paper)Removal of carbon dioxide (CO 2 ) from natural gas streams is mandatory to avoid pipeline corrosion, increase the heating value of the gas and reduce the gas volume in case of liquefied natural gas (LNG). The use of ... -
Kinetics of CO2 Adsorption/Desorption of Polyethyleneimine-Mesoporous Silica
( Wiley-VCH Verlag , 2017 , Article)The kinetics of adsorption of CO2 on solid sorbents based on polyethyleneimine/mesoporous silica (PEI/MPS) was studied by following the mass gain during CO2 flow. Linear (PEI-423) and branched (PEI-10k) polymers were ... -
Kinetics of CO2 reaction with solutions of n-methyl-diethanolamine mixed with selected amino acids using stopped flow technique
( AIChE , 2015 , Conference Paper)Kinetics of CO2 reactions with blended solutions of N-methyldiethanolamine (MDEA) and salts of Glycine and Taurine are presented in this work. The obtained results show that the new blended solutions could be promising ... -
"Know Thyself”: Racial Discrimination before the International Court of Justice – Recent Jurisprudential Developments
( Brill - Nijhoff , 2021 , Book chapter)Being the oldest United Nations human rights treaty and enjoying widespread participation, the International Convention on the Elimination of All Forms of Racial Discrimination (“CERD” or the “Convention”) was adopted ... -
Koh-based modified solvay process for removing na ions from high salinity reject brine at high temperatures
( MDPI , 2021 , Article)The traditional Solvay process and other modifications that are based on different types of alkaline material and waste promise to be effective in the reduction of reject brine salinity and the capture of CO2 . These ... -
l-Proline-Catalyzed Three-Component Reaction of 4-Chloro-3-formylcoumarin, Sodium Sulfide, and α-Halo Ketones: A Direct Approach to Thieno[3,2- c ]coumarins
( Georg Thieme Verlag KG , 2023 , Other)A new protocol for the synthesis of thieno[3,2-c]coumarins is disclosed. In this method, a 3-formyl-2-oxo-2H-chromene-4-thiolate anion is generated in situ by treatment of 4-chloro-3-formylcoumarin with sodium sulfide. ... -
Labor Camp Surveys in GCC Countries: Group Quarter Subsampling
( SAGE Publications Inc. , 2019 , Article)The Gulf Cooperation Council is a regional cooperation of six Middle Eastern countries-Saudi Arabia, Kuwait, the United Arab Emirates, Qatar, Bahrain, and Oman. A common feature of these countries is the existence of many ...
