Browsing Research Units by Title
Now showing items 1360-1379 of 4708
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Effects of microplastics’ physical and chemical properties on aquatic organisms: State-of-the-art and future research trends
( Elsevier , 2023 , Article)Microplastics (MPs) pose a global threat to marine ecosystems, little is known about the factors that influence their bioavailability. Microplastics have the ability to adsorb contaminants from the environment, as well as ... -
Effects of microstructures on hydrogen induced cracking of electrochemically hydrogenated double notched tensile sample of 4340 steel
( Elsevier Ltd , 2016 , Article)Quantitative fractographic characteristics of 4340 steel is demonstrated for a grain size range of 10-100 ?m and hardness range of 41-52 HRC. Double-notched tensile samples were electrochemically charged in-situ with ... -
Effects of Pipe Rotation on the Performance of Fibrous Fluids in Horizontal Well Cleanout
( Society of Petroleum Engineers (SPE) , 2022 , Conference Paper)The deposition of rock cuttings is a problem commonly faced during drilling, completion, and intervention operations. Using polymer-based fluids is a common technique to improve horizontal downhole cleaning. However, these ... -
Effects of potassium hydroxide and aluminum oxide on the performance of a modified solvay process for CO2 capture: A comparative study
( John Wiley and Sons Ltd , 2021 , Article)In a previous work, the overall performance of modified Solvay process was investigated in the absence of ammonia, where carbon dioxide and brine treatments were accomplished in a single reaction and in the presence of ... -
Effects of Previous Infection and Vaccination on Symptomatic Omicron Infections.
( Massachusetts Medical Society , 2022 , Article)The protection conferred by natural immunity, vaccination, and both against symptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection with the BA.1 or BA.2 sublineages of the omicron (B.1.1.529) ... -
Effects of previous infection, vaccination, and hybrid immunity against symptomatic Alpha, Beta, and Delta SARS-CoV-2 infections: an observational study
( Elsevier , 2023 , Article)BackgroundProtection against SARS-CoV-2 symptomatic infection and severe COVID-19 of previous infection, mRNA two-dose vaccination, mRNA three-dose vaccination, and hybrid immunity of previous infection and vaccination ... -
The Effects of Religiosity and Social Capital on Civic Engagement in Qatar
( Springer Verlag , 2017 , Article)Few studies have examined the role of religiosity and social capital on civic engagement in the context of a Muslim country. In this paper, we explore the impact of religiosity and social capital on charitable donations ... -
Effects of rutile-TiO2 nanoparticles on accelerated weathering degradation of poly(Lactic Acid)
( MDPI AG , 2020 , Article)The effect of accelerated weathering on poly(lactic acid) (PLA) and a PLA nanocomposite with rutile titanium (IV) dioxide (rutile-TiO2) was investigated. The accelerated weathering test applied consecutive steps of ultraviolet ... -
Effects of salinity and ascorbic acid on growth, water status and antioxidant system in a perennial halophyte
( Oxford University Press , 2015 , Article)Salinity causes oxidative stress in plants by enhancing production of reactive oxygen species, so that an efficient antioxidant system, of which ascorbic acid (AsA) is a key component, is an essential requirement of ... -
The Effects of Salinity and Genotype on the Rhizospheric Mycobiomes in Date Palm Seedlings.
( MDPI , 2024 , Article)Salinity severely affects the health and productivity of plants, with root-associated microbes, including fungi, potentially playing a crucial role in mitigating this effect and promoting plant health. This study employed ... -
Effects of SARS-CoV-2 Alpha, Beta, and Delta variants, age, vaccination, and prior infection on infectiousness of SARS-CoV-2 infections
( Frontiers Media , 2022 , Article)In 2021, Qatar experienced considerable incidence of SARS-CoV-2 infection that was dominated sequentially by the Alpha, Beta, and Delta variants. Using the cycle threshold (Ct) value of an RT-qPCR-positive test to proxy ... -
Effects of sodium carbonate addition, heat and agitation on swelling and rheological behavior of Ca-bentonite colloidal dispersions
( Elsevier Ltd , 2017 , Article)The effects of the addition of sodium carbonate (Na2CO3) and the subsequent simultaneous heating and stirring on the rheological behavior of Ca-bentonite colloidal dispersions have been investigated in this study. Ca-bentonite ... -
The Effects of Spirulina Supplementation on Cardiometabolic Risk Factors: A Narrative Review
( Taylor & Francis , 2024 , Article)Spirulina (Arthrospira platensis) is a cyanobacterium associated with multiple health benefits. Cardiometabolic diseases such as cardiovascular disease, nonalcoholic fatty liver disease, and diabetes are prevalent yet ... -
Effects of superelastic nano-NiTi additions on electroless Ni –P coating properties under bending
( Elsevier B.V. , 2019 , Article)Electroless Ni –P-nano-NiTi composite coatings have been shown to toughen the brittle Ni –P matrix through transformation toughening, crack bridging and deflection, and micro-cracking. In this study, electroless Ni –P-nano-NiTi ... -
Efficacy and Clinical Outcomes of mRNA COVID-19 Vaccine in Pregnancy: A Systematic Review and Meta-Analysis
( S. Karger AG , 2024 , Article)BACKGROUND: The world has witnessed one of the largest pandemics, dubbed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). As of December 2020, the USA alone reported 98,948 cases of coronavirus disease 2019 ... -
The efficacy data of two household cleaning and disinfecting agents on Lens culinaris Medik and Vicia faba seed germination
( Elsevier , 2021 , Article)A germination test of Vicia faba and Lens culinaris seeds under the effect of bleach and vinegar was conducted for seven days, and the observations were recorded daily. The completely randomized design (CRD) was used to ... -
Efficacy of Euphorbia helioscopia in context to a possible connection between antioxidant and antidiabetic activities: a comparative study of different extracts
( Springer Nature , 2021 , Article)Background: Euphorbia helioscopia, conventionally known as sun spurge, has been used as a traditional medicine to treat different diseases owing to its reported antitumor, antiviral and antioxidant activities. Methods: The ... -
Efficiency of benthic diatom-associated bacteria in the removal of benzo(a)pyrene and fluoranthene
( Elsevier , 2021 , Article)We investigated the efficiency of a benthic diatom-associated bacteria in removing benzo(a)pyrene (BaP) and fluoranthene (Flt). The diatom, isolated from a PAH-contaminated sediment of the Bizerte Lagoon (Tunisia), was ... -
Efficient electrochemical conversion of CO2 into formic acid using colloidal NiCo@rGO catalyst
( Elsevier , 2024 , Article)A simple approach was used to synthesize a catalyst based on colloidal NiCo with rGO support. The catalyst was uniformly deposited on acid-treated Sn foil using drop-casting method. The prepared NiCo@rGO catalyst was ... -
Efficient extraction of lipids from microalgal biomass for the production of biofuels using low-cost protic ionic solvents
( Elsevier , 2023 , Article)The valorization of lipids available in microalgal biomass supports the indispensable transition from fossil fuels to renewable energy systems such as biofuels. Ionic liquids have been long investigated for the effective ...