تصفح Research Units حسب العنوان
السجلات المعروضة 4255 -- 4274 من 4636
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Utilization of Two Microalgae Species, Synechococcus sp. and Cheatoceros sp., for Aquatic Toxicity Assessments in the Qatari Marine Environmen
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Microalgal bioassays are currently used worldwide to help assess the impacts of contaminants on aquatic ecosystems. Algae are particularly important to such assessments because they represent the basic trophic level of the ... -
UV Induced Photodegradation of Direct Green dye by Tb-doped La10Si6O27 Catalyst
( Qatar University Press , 2023 , Conference Paper)Due to the expansion of industry, the world's population growth has led to increased air and water contamination. Because they are poisonous and non-biodegradable, organic dyes are a significant source of this contamination. ... -
UV-Accelerated Photocatalytic Degradation of Pesticide over Magnetite and Cobalt Ferrite Decorated Graphene Oxide Composite
( MDPI , 2020 , Article)Pesticides are one of the main organic pollutants as they are highly toxic and extensively used worldwide. The reclamation of wastewater containing pesticides is of utmost importance. For this purpose, GO-doped metal ... -
Vaccine evaluation and genotype characterization in children infected with rotavirus in Qatar
( Springer Nature , 2023 , Article)Background: We characterized and identified the genetic and antigenic variations of circulating rotavirus strains in comparison to used rotavirus vaccines. Methods: Rotavirus-positive samples (n = 231) were collected and ... -
Vaccine-Induced Antibodies that Neutralize Group 1 and Group 2 Influenza A Viruses
( Elsevier Inc. , 2016 , Article)Antibodies capable of neutralizing divergent influenza A viruses could form the basis of a universal vaccine. Here, from subjects enrolled in an H5N1 DNA/MIV-prime-boost influenza vaccine trial, we sorted hemagglutinin ... -
Validation and application of a membrane filtration evaluation protocol for oil-water separation
( Elsevier Ltd , 2021 , Article)Membrane filtration processes like microfiltration (MF) and ultrafiltration (UF) are proven to be effective in industrial wastewater treatment, including oil-water separation, as they generate suitable quality permeate for ... -
Validation of a Novel Fluorescent Lateral Flow Assay for Rapid Qualitative and Quantitative Assessment of Total Anti-SARS-CoV-2 S-RBD Binding Antibody Units (BAU) from Plasma or Fingerstick Whole-Blood of COVID-19 Vaccinees
( MDPI , 2022 , Article)Background: Limited commercial LFA assays are available to provide a reliable quantitative measurement of the total binding antibody units (BAU/mL) against the receptor-binding domain of the SARS-CoV-2 spike protein (S-RBD). ... -
Validation of the General Self-Efficacy Scale among Qatari young women
( World Health Organization , 2015 , Article)The General Self-Efficacy Scale (GSES) is a measure of people’s beliefs about their capacity to cope with life’s demands. Self-efficacy may be particularly relevant in transitional stages such as in late adolescence, when ... -
Validation of Total Mercury in Marine Sediment and Biological Samples, Using Cold Vapour Atomic Absorption Spectrometry
( MDPI , 2018 , Article)A method for the measurement of total mercury (T-Hg) in environmental samples using cold vapour atomic absorption spectrometry (CV AAS) has been validated yielding a dynamic range (0.04–10.00 g/kg) and high certified ... -
Valorization of salt post-modified poultry manure biochars for phosphorus recovery from aqueous solutions: investigations on adsorption properties and involved mechanism
( Springer , 2021 , Article)In this research work, raw poultry manure biochar (RPM-B) was post-modified by two metal salts and then evaluated for P recovery from aqueous solutions in batch mode. The modified biochar characterization showed that RPM-B ... -
Vanadium Carbide (V4C3) MXene as an Efficient Anode for Li-Ion and Na-Ion Batteries
( MDPI , 2022 , Article)Li-ion batteries (LIBs) and Na-ion batteries (SIBs) are deemed green and efficient electrochemical energy storage and generation devices; meanwhile, acquiring a competent anode remains a serious challenge. Herein, the ... -
Vapor sensing performances of PVDF nanocomposites containing titanium dioxide nanotubes decorated multi-walled carbon nanotubes
( Springer New York LLC , 2018 , Article)Inorganic nanocarbon hybrid materials are good alternatives for superior electrochemical performance and specific capacitance to their traditional counterparts. Nanocarbons act as a good template for the growth of metal ... -
Vapour-Phase Selective Hydrogenation of γ-Valerolactone to 2-Methyltetrahydrofuran Biofuel over Silica-Supported Copper Catalysts
( MDPI , 2022 , Article)2-Methyltetrahydrofuran (MTHF) is a desirable biomass-based platform chemical with excellent potential as an ideal biofuel, green solvent, and raw material for synthesizing downstream chemicals. In this work, a series of ... -
Variability of blue carbon storage in arid evaporitic environment of two coastal Sabkhas or mudflats
( Nature Research , 2023 , Article)Coastal Sabkhas are mudflats found in arid coastal regions that are located within the supratidal zone when high rates of evaporation lead to high salinity. While evaporitic minerals often accumulate underneath the surface, ... -
Variability of Physical and Biogeochemical Parameters in the Exclusive Economic Zone of Qatar
( Qatar University Press , 2021 , Poster)The oceanographic data collected along a transect in the Exclusive Economic Zone (EEZ) of Qatar during late summer (September 2014) and winter (January 2015) have been analyzed to investigate the spatial and temporal ... -
Variable Message Sign strategies for Congestion Warning on Motorways
( Hamad bin Khalifa University Press (HBKU Press) , 2018 , Conference Paper)Introduction Motorways are the safest roads by design and regulation. Still, motorways in the European Union accounted for nearly 27,500 fatalities from 2004 to 2013 (Adminaite, Allsop, & Jost, 2015). The likelihood ... -
Variable message sign strategies for congestion warning on motorways - A driving simulator study
( Gioacchino Onorati Editore , 2018 , Article)Congestion and stopped traffic on motorways constitute a potential safety hazard for drivers. In particular, unexpected hard congestion tails are the causes of serious rear-end crashes as they compromise the drivers' ability ... -
Variation in temperature and light but not salinity invokes antioxidant enzyme activities in germinating seeds of Salsola drummondii
( Taylor and Francis Ltd. , 2016 , Article)Seeds with efficient antioxidant defence system show higher germination under stress conditions; however, such information is limited for the halophyte seeds. We therefore studied lipid peroxidation and antioxidant responses ... -
Variation of soil properties with sampling depth in two different light-textured soils after repeated applications of urban sewage sludge
( Elsevier , 2021 , Article)Semi-arid agricultural soils have increasingly been subjected to urban sewage sludge (USS) applications due to accelerated soil depletion and shortages in manure supply. Research studies addressing USS reuse have mostly ... -
Variations in respiratory syncytial virus activity following the relaxation of COVID-19 restrictions in Qatar.
( Oxford University Press , 2022 , Article)Despite the relaxation of COVID-19 restrictions in Qatar in October-December 2020, the detection of RSV was reduced ∼25-fold compared with 2019. This dramatic decrease during the typical RSV season could be related to ...
