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Now showing items 411-420 of 422
Burrowing crabs in arid mangrove forests on the southwestern Arabian Gulf: Ecological and biogeographical considerations
(
Elsevier B.V.
, 2020 , Article)
Many species of mangrove crabs are essential in the formation of mangrove ecosystems, and the bioturbation resulting from the excavation of their underground chambers is directly correlated with substrate oxygenation and ...
Diagnostic Efficiency of Three Fully Automated Serology Assays and Their Correlation with a Novel Surrogate Virus Neutralization Test in Symptomatic and Asymptomatic SARS-COV-2 Individuals
(
MDPI
, 2020 , Article)
Abstract: To support the deployment of serology assays for population screening during the
COVID-19 pandemic, we compared the performance of three fully automated SARS-CoV-2 IgG assays: Mindray CL-900i® (target: spike [S] ...
Nutritive effect of dust on microbial biodiversity and productivity of the Arabian Gulf
(
Bellwether Publishing, Ltd.
, 2020 , Article)
The Arabian Gulf is exposed to intensive dust storms during summer until early winter. We investigated the nutritive effect of the dust on microbial biodiversity of the water column and the productivity of the Gulf. We ...
Cytogenetic Characterization of Three Arabian Gulf Bivalve Species
(
Institute of Malacology
, 2020 , Article)
The diploid number and karyotype of three endemic and highly distributed species from the Qatari shores: Brachidontes variabilis (Krauss, 1848) (Mytilidae), Isognomon nucleus (Lamarck, 1819) (Pteriidae) and Neotrapezium ...
Highly porous PtPd nanoclusters synthesized via selective chemical etching as efficient catalyst for ethanol electro-oxidation
(
Elsevier
, 2020 , Article)
Direct ethanol fuel cells (DEFCs) have received great interest owing to their high power density and environmental friendness. Nevertheless, the designing of active, durable, and efficient anode for DEFCs is a profound ...
Microstructure and mechanical behavior of hot extruded aluminum/tin-bismuth composites produced by powder metallurgy
(
MDPI AG
, 2020 , Article)
In this study, Al-BiSn composites were synthesized by a combination of microwave sintering and hot extrusion processes. The structural, morphological, mechanical, and thermal properties were investigated to elucidate the ...
مشروعية استعمال القوة في العلاقات الدولية: دراسة مقارنة بين القانون الدولي والشريعة الإسلامية
(
دار نشر جامعة قطر
, 2020 , Article)
تُعدُّ مسألة مشروعية استعمال القوة في العلاقات الدولية من أكثر المسائل إشكالًا عبر التاريخ، حيث اختلفت محددات مشروعية استعمالها باختلاف الأديان والثقافات والأزمنة والأمكنة. وفي العصر الحديث استقر النظام الدولي على معايير ...
The role of polypropylene microfibers in thermal properties and post-heating behavior of cementitious composites
(
Multidisciplinary Digital Publishing Institute (MDPI)
, 2020 , Article)
This paper experimentally studied the effect of polypropylene (PP) microfibers on thermal and post-heating mechanical behaviors of cementitious composites. Cement mortars with small dosage of polypropylene fibers were ...
Hybrid effect of carbon nanotubes and polypropylene microfibers on fire resistance, thermal characteristics and microstructure of cementitious composites
(
Elsevier
, 2020 , Article)
The current study experimentally investigates the hybrid effect of carbon nanotubes (CNTs) and polypropylene (PP) microfibers on fire resistance and thermal characteristics of cementitious composites. Cement mortar with ...
Industrial waste utilization of carbon dust in sustainable cementitious composites production
(
Multidisciplinary Digital Publishing Institute (MDPI)
, 2020 , Article)
This paper experimentally investigates the effect of utilization of carbon dust generated as an industrial waste from aluminum factories in cementitious composites production. Carbon dust is collected, characterized, and ...