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السجلات المعروضة 3156 -- 3175 من 4763
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Polymer-metal oxide composite nanofibers
( Elsevier , 2021 , Book chapter)Extensive studies have been conducted on different kinds of polymers, their composites, and multifunctionalities, depending on their structural features. Metal oxides and their polymer nanocomposites offer technological ... -
Polymer-metal oxide composite nanofibers
( Elsevier , 2021 , Book chapter)Extensive studies have been conducted on different kinds of polymers, their composites, and multifunctionalities, depending on their structural features. Metal oxides and their polymer nanocomposites offer technological ... -
Polymerase chain reaction ribotyping of Clostridium difficile isolates in Qatar: a hospital-based study
( BioMed Central Ltd. , 2014 , Article)Background Clostridium difficile infection (CDI) is not generally reported to public health authorities in the Middle East and its true prevalence remains largely unknown. The aims of this study were to determine the ... -
Polymeric formulations used for loss circulation materials and wellbore strengthening applications in oil and gas wells: A review
( Elsevier B.V. , 2019 , Article Review)Drilling fluid circulation loss is referred to as “the most severe problem in drilling of oil and gas wells”, as a routine solution, loss circulation materials are added to fill any fractures and vugs that may have been ... -
Polymeric smart coatings containing modified capped halloysite nanotubes for corrosion protection of carbon steel
( Springer , 2023 , Article)A newly designed smart self-healing epoxy coating system comprised of modified halloysite nanotubes (HNTs) having capping is proposed for corrosion protection of steel. In the first step, HNTs were loaded with 8-hydroxyquinoline ... -
Polymeric Surfactants and Emerging Alternatives used in the Demulsification of Produced Water: A Review
( Taylor and Francis Inc. , 2018 , Article Review)Stable emulsions are frequently encountered in oil production and cause a series of environmental and operational issues. Chemical demulsification is widely used for the separation of oil from water or removal of water ... -
Polymerization of 3-cyanopropyl (triethoxy) silane: A kinetic study using gas chromatography
( John Wiley and SonsInc. , 2018 , Article)Gas chromatography (GC) was used to study the kinetics of the 3-cyanopropyl triethoxysilane (CTES) polymerization. The reaction is a consecutive complex reaction that depends mainly on the kinetics of the first hydrolyzed ... -
Polymerization of organoalkoxysilanes: Kinetics of the polycondensation progress and the effect of solvent properties and salts addition
( Elsevier B.V. , 2020 , Article)The kinetics and the produced oligomer patterns of organoalkoxysilanes (AS) were investigated under different conditions by using gas chromatography (GC), because the degree of the polymerization and the siloxane conformations ... -
Polymers in optics
( Elsevier , 2020 , Book chapter)The unique and tunable properties of polymers open up the possibilities for using these materials in numerous applications. Among various peculiar features, the optical properties of polymers and their novel composites, ... -
Polymers to improve the world and lifestyle: physical, mechanical, and chemical needs
( Elsevier , 2020 , Book chapter)The wide-ranging applications of polymers are due to their important advantages that involve their relatively low cost, low density, resistance to corrosion, resistance to most chemicals, and easier manufacturing designs. ... -
Polymethyl methacrylate–ovalbumin @ graphene oxide drug carrier system for high anti-proliferative cancer drug delivery
( Springer Nature , 2019 , Article)High permeable drug delivery mechanism is indispensable for the treatment of various diseases including cancer. Protein-polymeric carriers have enhanced the permeability and therapeutic of bioactive compounds. Here, ... -
Polyolefin-Based Smart Self-Healing Composite Coatings Modified with Calcium Carbonate and Sodium Alginate.
( MDPI , 2024 , Article)Corrosion-related damage incurs significant capital costs in many industries. In this study, an anti-corrosive pigment was synthesized by modifying calcium carbonate with sodium alginate (SA), and smart self-healing coatings ... -
Polyvinyl alcohol (PVA)/polystyrene sulfonic acid (PSSA)/carbon black nanocomposite for flexible energy storage device applications
( Springer New York LLC , 2017 , Article)Herein, we report the preparation and characterizations of polyvinyl alcohol (PVA) and polystyrene sulfonic acid (PSSA) blend nanocomposites reinforced with carbon black nanoparticles (CBNPs). The structural changes, ... -
Polyvinylpyridine–carbon dots composite-based novel humidity sensor
( Springer , 2023 , Article)This work describes the rational design of thin films based on PVP-modified carbon dots for potential resistive humidity sensing application, prepared via spin coating on ITO substrates. The modified carbon dots were ... -
Polyzwitterionic Hydrogels in Engines Based on the Antipolyelectrolyte Effect and Driven by the Salinity Gradient
( American Chemical Society , 2019 , Article)In this paper, we propose and investigate an original approach to energy conversion based on polyzwitterionic hydrogels, which exhibit an antipolyelectrolyte effect that enables them to swell in salt water and shrink in ... -
Popular Support for Political Parties in Sudan 2013
(2014 , Conference Paper)Contemporary Political Parties Map in Sudan The Sudanese political map is a multiple and dynamic one. It continually shows new and myriad political forces in western and eastern Sudan. In addition to the traditional and ... -
Population immunity of natural infection, primary-series vaccination, and booster vaccination in Qatar during the COVID-19 pandemic: an observational study
( Elsevier , 2023 , Article)BackgroundWaning of natural infection protection and vaccine protection highlight the need to evaluate changes in population immunity over time. Population immunity of previous SARS-CoV-2 infection or of COVID-19 vaccination ... -
Population structure of marine turtles in coastal waters of Qatar
( Inter-Research Science Publishing , 2015 , Article)Knowledge of the interrelationships between habitats and life-stage development in marine turtles requires an understanding of recruitment, size and age at maturity, sex ratios, growth and sexual development rates, ... -
Poreless Separator and Electrolyte Additive for Lithium-Sulfur Batteries with High Areal Energy Densities
( WILEY-VCH Verlag , 2015 , Article)Despite the attractive theoretical capacity of sulfur over 1600 mA h g−1, lithium–sulfur (Li–S) batteries suffer from insufficient cycle lives mainly due to fatal polysulfide dissolution. This chronic drawback becomes ... -
Porous Composite Catalysts for the Removal of Water Organic Pollutants: A Materials Chemist Perspective
( Springer Nature , 2024 , Book chapter)This contribution is written from the materials chemist perspective, with a focus on the stepwise design of multicomponent catalytic materials. Two major types of nanocatalyst support are considered: mesoporous silicaMesoporous ...
