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السجلات المعروضة 21 -- 40 من 5510
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A carbon dot-based clay nanocomposite for efficient heavy metal removal
( Royal Society of Chemistry , 2023 , Article)Carbon dots and their derivatives with fascinating photoluminescence properties have recently attracted tremendous scientific attention. This work describes the preparation of novel fluorescent bentonite clay (B), modified ... -
A CFD Investigation on the Effect of IPSBR Operational Conditions on Liquid Phase Hydrodynamics
( Institute of Electrical and Electronics Engineers Inc. , 2021 , Conference)This study used a computational fluid dynamics simulation of an inert-particle spouted-bed reactor, which consists of a cylindrical vessel with a conical base, to investigate the effect of different operational parameters ... -
A CFD- RSM study of cuttings transport in non-Newtonian drilling fluids: Impact of operational parameters
( Elsevier B.V. , 2022 , Article)Cuttings removal out of the wellbore represents a real barrier for successful drilling operations. The performance of hole cleaning is determined by several factors. The current article provides a theoretical study of the ... -
A channel-aware reservation protocol for cooperative content distribution over OFDMA networks
( IEEE , 2011 , Conference)In this paper, a channel aware resource reservation protocol for content distribution in an OFDMA wireless network with mobile-to-mobile cooperation is presented. The proposed approach consists of a reservation phase and ... -
A characterization study of Wadi Thamad oil shale: Towards a new source of energy in Jordan
( John Wiley and Sons Ltd , 2024 , Article)Jordan's energy sector faces significant challenges due to rising fuel prices, making the exploration of local energy resources crucial. The abundant oil shale deposits in Wadi Thamad present a promising opportunity. Since ... -
A combined pathway for the synthesis of nitidine family alkaloids
( Springer Netherlands , 2019 , Article)Three related alkaloids, oxynitidine, nitidine and 5,6-dihydronitidine, have been afforded by the new synthetic protocols. In this approach, the Ni-catalyzed annulation reaction is indicated as the key step to construct ... -
A comparative physicochemical property assessment and techno-economic analysis of biolubricants produced using chemical modification and additive-based routes
( Elsevier , 2022 , Article)Several edible and non-edible oil sources are currently being developed as renewable basestocks for biolubricant production. However, these feedstocks possess undesirable physicochemical properties limiting their lubricant ... -
A comparative review of natural and synthetic biopolymer composite scaffolds
( MDPI AG , 2021 , Article Review)Tissue engineering (TE) and regenerative medicine integrate information and technology from various fields to restore/replace tissues and damaged organs for medical treatments. To achieve this, scaffolds act as delivery ... -
A Comparative Study of Chemically and Biologically Synthesized MgO Nanomaterial for Liquefied Petroleum Gas Detection
( Springer New York LLC , 2018 , Article)The exceptional chemical and physical properties of nanostructured materials are extremely suitable for designing new and enhanced sensing devices, particularly gas sensors and biosensors. The present work describes the ... -
A comparative study of novel activated AMP using 1,5-diamino-2-methylpentane vs MEA solution for CO2 capture from gas-fired power plant
( Elsevier Ltd , 2018 , Article)Bench-scale pilot plant study of AMP and 1,5-diamino-2-methylpentane (DA2MP) blend for CO2 capture from gas-fired power plant is investigated. The concentration of the amine blend is 2 kmol/m3 AMP-1.5 kmol/m3 DA2MP while ... -
A comparative study of Seagrasses Species in Regional Seas and QMZ
( Qatar University Press , 2021 , Poster)Seagrasses are flowering monocot green plants that have adapted to marine life, and remain completely immersed in seawater and are primary producers of food for numerous marine animals. Seagrasses are of worldwide distribution ... -
A comparative study of structural and mechanical properties of Al-Cu composites prepared by vacuum and microwave sintering techniques
( Elsevier Editora Ltda , 2018 , Article)In this paper, the aluminum metal matrix composite reinforced with copper particulates (3, 6 and 9 vol.%) were fabricated by high energy ball milling, followed by vacuum sintering (VS) and microwave sintering techniques ... -
A comparative study of the growth of Tetraselmis sp. in large scale fixed depth and decreasing depth raceway ponds
( Elsevier Ltd , 2016 , Article)In this study, an alternative approach was proposed where excess seawater would be added only during inoculation (DD) rather than daily addition (FD). Growth and metabolite contents of Tetraselmis sp. weren't affected for ... -
A Comparative Study of the Role of the Nation-State Building Process in the Middle East Crises; a Case Study of the Crisis in Bahrain, Iraq and Yemen
( Gulf Studies center - College of Arts & Sciences - Qatar University , 2021 , Conference)Political stability has always been the most important concern of the states. Political stability is equal with lack of serious threats and challenges that can put country in danger. Due to multiple reasons like; the lack ... -
A comparative study on long term stability of self-healing epoxy coating with different inorganic nanotubes as healing agent reservoirs
( BME-PT and GTE , 2017 , Article)Self-healing epoxy coatings were prepared with different nanotubes as reservoirs for epoxy monomer (healing agent). The nanotubes selected for the current study were TiO2 nanotubes with two different tube diameter (TNT1 ... -
A comparative study on the operational performance of four-leg intersections by control type
( Elsevier Ltd , 2018 , Article)The selection of proper control types at intersections at the planning stage is an important concern considering the difficulty in comparing the performance of different control types. Therefore, several manuals proposed ... -
A comparative study on the performance of hybrid solar cells containing ZnSTe QDs in hole transporting layer and photoactive layer
( Springer Netherlands , 2016 , Article)In this paper, ZnSTe quantum dots-based hybrid solar cells (HSC) with two different device architectures have been investigated. The improved performance of the poly(3-hexylthiophene) (P3HT) and [6,6]phenyl C71 butyric ... -
A comprehensive review of electrocoagulation for water treatment: Potentials and challenges
( Academic Press , 2017 , Article Review)Electrocoagulation is an effective electrochemical approach for the treatment of different types of contaminated water and has received considerable attention in recent years due its high efficiency in dealing with numerous ... -
A comprehensive review of portable cold storage: Technologies, applications, and future trends
( Elsevier , 2024 , Article Review)In recent years, there has been a substantial increase in the usage of portable cold storage technologies, as the demand for flexible and mobile solutions for storing perishable goods has expanded. The advantages of portable ... -
A comprehensive review on eutectic phase change materials: Development, thermophysical properties, thermal stability, reliability, and applications
( Elsevier , 2025 , Article Review)Phase change materials (PCMs) are important constituents for the storage of thermal energy available from the sun. It acts as a bridge between energy demand and supply while reducing the mismatch. Organic and inorganic ...
