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Now showing items 3819-3838 of 25628
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Chitosan/lignosulfonate nanospheres as "green" biocide for controlling the microbiologically influenced corrosion of carbon steel
( MDPI AG , 2020 , Article)In this work, uniform cross-linked chitosan/lignosulfonate (CS/LS) nanospheres with an average diameter of 150-200 nm have been successfully used as a novel, environmentally friendly biocide for the inhibition of mixed ... -
Chitosan/Polyacrylamide Green Gels for Water Control in High-Temperature Reservoirs
( American Chemical Society , 2022 , Article)The rheology of a gel system composed of polyacrylamide (PAM) and chitosan is studied under typical reservoir conditions. The impacts of the degree of chitosan deacetylation, temperature, and salinity on the gelation ... -
Chlorophyll-a concentrations in the Arabian Gulf waters of arid region: A case study from the northern coast of Qatar
( Elsevier , 2022 , Article)Remote sensing of spectrally active Chlorophyll-a (Chl-a) in the gulf water of an arid region is important to understand the spatial and temporal variations of phytoplankton and biomass in the water. This study characterizes ... -
Choice and Expenditure: A Double Hurdle Model of Private Tutoring in Qatar
( Qatar University Press , 2020 , Poster)To shed light on the demand for private tutoring, this paper presents new evidence for the case of Qatar. The household demand for private tutoring is estimated using the double hurdle model using a sample of 1226 participants ... -
Choice and expenditure: A double hurdle model of private tutoring in Qatar
( Elsevier , 2021 , Article)Deciding whether to use private tutoring services is now a common choice many households are facing globally. This paper presents new evidence for Qatar's case to shed light on the demand for private tutoring. The household ... -
Choice of Antimicrobials in Surgical Prophylaxis - Overuse and Surgical Site Infection Outcomes from a Tertiary-Level Care Hospital
( Frontiers Media , 2022 , Article)Background: This study was aimed to describe the choice of Surgical Antimicrobial Prophylaxis at a tertiary-level care hospital in United Arab Emirates. It also associated the choice between two leading antimicrobials for ... -
Choline chloride based natural deep eutectic solvent for destabilization and separation of stable colloidal dispersions
( Elsevier B.V. , 2021 , Article)In solid-liquid separation processes, coagulation/flocculation is one of the most popular techniques in treating wastewater, as it is efficient, simple, and economical. Consequently, the formation of a new environment ... -
Cholinergic and dopaminergic neuronal differentiation of human adipose tissue derived mesenchymal stem cells.
( Wiley , 2018 , Article)Mesenchymal stem cells (MSCs) are multipotent cells that can differentiate into various cell types such as cartilage, bone, and fat cells. Recent studies have shown that induction of MSCs in vitro by growth factors including ... -
Choosing by Advantages (CBA) Used as a Qualitative Assessment Methodology in Lean Construction
( Qatar University Press , 2023 , Conference Paper)Decision making is part of the daily duties of researchers, engineers, and consultants, and taking the right decisions requires quantitative assessment which usually needs data and analysis. In construction industry, data ... -
Choroidal metastasis as initial presentation of aggressive medullary thyroid carcinoma with widespread mediastinal, brain, pituitary, bone, lung, and liver metastasis: Case report and literature review
( Elsevier , 2021 , Article)Introduction Medullary thyroid carcinoma (MTC) is a neuroendocrine tumor that originates from the parafollicular C cells of the thyroid gland. MTC can be due to sporadic or hereditary causes due to gain of function germ ... -
Chromite Enrichment in the Recent Fluviatile Sediments, North Iraq
( Qatar University , 1999 , Article)The Recent sediments from North Iraq are characterized by a higher content of chromite. This paper deals with the mineralogy and geochemistry of chromite in the heavy mineral assemblages from Recent fluvial sediments in ... -
Chromium doped ceria for solar thermochemical fuel production
( AIChE , 2018 , Conference Paper)In this paper, the thermal reduction and CO2splitting ability of Ce0.9Cr0.102-δare investigated by performing multiple thermochemical cycles using a thermogravimetric analyzer. The Ce0.9Cr0.102-δmaterial is successfully ... -
Chromium removal from tannery wastewater by electrocoagulation: Optimization and sludge characterization
( MDPI AG , 2020 , Article)The treatment of tannery effluent is of great interest as it contains a complexmixture ofpollutants, primarily chromium. The disposal of this wastewater can have adverse effects on the environment and aquatic life, which ... -
Chromium toxicity in plants: consequences on growth, chromosomal behavior and mineral nutrient status
( the Scientific and Technological Research Council of Turkey (TUBITAK) , 2022 , Article)Chromium (Cr) is a heavy metal of commercial importance; thus, significant amounts are released in wastewaters. The mobility and distribution of metals in the environment is related not only to their concentration but also ... -
Chromosomal abnormalities in infertile men with azoospermia and severe oligozoospermia in Qatar and their association with sperm retrieval intracytoplasmic sperm injection outcomes
( Arab Association of Urology , 2018 , Article)Objective: To study the types and incidence of chromosomal abnormalities in infertile men with azoospermia and severe oligozoospermia in Qatar, and to compare the hormonal changes, testicular sperm retrieval rate, and ... -
A Chromosome 9p24.1 Amplification in Colorectal Cancer with Metastases to the Kidney and Adrenal Gland: A Case Report
( karger , 2023 , Article)Colorectal cancer (CRC) is the third leading cause of mortality worldwide. The Food and Drug Administration recently designated pembrolizumab, an immune checkpoint inhibitor (ICI) against a programmed death-1 receptor, as ... -
Chromosome aberrations and fertility disorders in domestic animals
( Annual Reviews Inc. , 2016 , Article Review)The association between chromosomal abnormalities and reduced fertility in domestic animals is well recorded and has been studied for decades. Chromosome aberrations directly affect meiosis, gametogenesis, and the viability ... -
Chronic administration of nano-sized PAMAM dendrimers in vivo inhibits EGFR-ERK1/2-ROCK signaling pathway and attenuates diabetes-induced vascular remodeling and dysfunction.
( Elsevier , 2019 , Article)We investigated whether chronic administration of nano-sized polyamidoamine (PAMAM) dendrimers can have beneficial effects on diabetes-induced vascular dysfunction by inhibiting the epidermal growth factor receptor ... -
Chronic Cadmium Exposure Alters Cardiac Matrix Metalloproteinases in the Heart of Sprague-Dawley Rat
( Frontiers Media , 2021 , Article)The aim of this study was to evaluate the role of chronic cadmium exposure in modulating cardiac matrix metalloproteinases (MMPs) in the heart of rats. Adult male Sprague-Dawley rats were exposed to 15 ppm CdCl2 in drinking ... -
Chronic illnesses and labor market participation in the Arab countries: evidence from Egypt and Tunisia
( Taylor and Francis Group , 2022 , Article)This paper examines the impact of chronic illnesses on labor force participation using labor market surveys data for Egypt and Tunisia. The study also investigates the reverse effect of labor force participation on the ...
