تصفح Research Units حسب العنوان
السجلات المعروضة 3276 -- 3295 من 4709
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Properties of microwave sintered al-cu metal matrix composites
( Association for Iron and Steel Technology, AISTECH , 2016 , Conference Paper)The present work focuses on the effect of copper (Cu) reinforcement on structural and mechanical properties of Al-Cu composites synthesized through microwave sintering approach. The pure aluminum (Al) and copper (Cu) powders ... -
Proportionally fair approach for tor's circuits scheduling
( Institute of Electrical and Electronics Engineers Inc. , 2020 , Conference Paper)The number of users adopting Tor to protect their online privacy is increasing rapidly. With a limited number of volunteered relays in the network, the number of clients' connections sharing the same relays is increasing ... -
Prospective Role of Bioactive Molecules and Exosomes in the Therapeutic Potential of Camel Milk against Human Diseases: An Updated Perspective
( MDPI , 2022 , Article Review)Camel milk (CM) constitutes an important dietary source in the hot and arid regions of the world. CM is a colloidal mixture of nutritional components (proteins, carbohydrates, lipids, vitamins, and minerals) and non-nutritional ... -
Prospects for Alternative Energy in the Gulf
( Gulf Studies center - College of Arts & Sciences - Qatar University , 2019 , Conference Paper)The Middle East region holds the world's largest oil and natural gas proven reserves. Several Middle-Eastern states are major oil producers and consumers. Given price fluctuations and environmental concerns, many countries ... -
Prospects for climate-scale regional numerical modelling for the Arabian Gulf and Qatar's marine region
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Physical oceanographic studies at the Environmental Science Center (ESC) entail observational and numerical aspects. The main objective of observational studies is to build a reference time series for Qatar's marine exclusive ... -
Prostate-specific antigen glycoprofiling as diagnostic and prognostic biomarker of prostate cancer
( Royal Society Publishing , 2019 , Article Review)The initial part of this review details the controversy behind the use of a serological level of prostate-specific antigen (PSA) for the diagnostics of prostate cancer (PCa). Novel biomarkers are in demand for PCa diagnostics, ... -
"Protecting" or "policing": Academic researchers' view of IRBs in an arab context
( SAGE Publications Inc. , 2014 , Article)A recent surge of research universities and human subjects research funding in the Arab world raises concerns about applied research ethics and oversight. In-depth interviews conducted with 52 researchers in Lebanon and ... -
Protection against Reinfection with the Omicron BA.2.75 Subvariant
( Massachusetts Medical Society , 2023 , Other)The BA.2.75 sublineage of the B.1.1.529 (omicron) variant of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) may escape neutralizing antibodies. The BA.2.75 sublineage (primarily the BA.2.75.2 subvariant) ... -
Protection against the omicron variant from previous SARS-CoV-2 infection
( Massachusetts Medical Society , 2022 , Other)Natural infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) elicits strong protection against reinfection with the B.1.1.7 (alpha),1,2 B.1.351 (beta),1 and B.1.617.2 (delta)3 variants. However, the ... -
Protection from previous natural infection compared with mRNA vaccination against SARS-CoV-2 infection and severe COVID-19 in Qatar: a retrospective cohort study
( Elsevier , 2022 , Article)BackgroundUnderstanding protection conferred by natural SARS-CoV-2 infection versus COVID-19 vaccination is important for informing vaccine mandate decisions. We compared protection conferred by natural infection versus ... -
Protection of Omicron sub-lineage infection against reinfection with another Omicron sub-lineage
( Nature Research , 2022 , Article)There is significant genetic distance between SARS-CoV-2 Omicron (B.1.1.529) variant BA.1 and BA.2 sub-lineages. This study investigates immune protection of infection with one sub-lineage against reinfection with the other ... -
Protective Effect of Cyclically Pressurized Solid⁻Liquid Extraction Polyphenols from Grape Pomace on Oxidative Endothelial Cell Death.
( MDPI , 2018 , Article)The aim of this work is the evaluation of a green extraction technology to exploit winery waste byproducts. Specifically, a solid⁻liquid extraction technology (Naviglio Extractor) was used to obtain polyphenolic antioxidants ... -
Protective effect of olive leaves phenolic compounds against neurodegenerative disorders: Promising alternative for Alzheimer and Parkinson diseases modulation
( Elsevier , 2022 , Article)The main objective of this work was to review literature on compounds extracted from olive tree leaves, such as simple phenols (hydroxytyrosol) and flavonoids (Apigenin, apigenin-7-O-glucoside, luteolin.) and their diverse ... -
Protective Effect of Previous SARS-CoV-2 Infection against Omicron BA.4 and BA.5 Subvariants.
( Massachusetts Medical Society , 2022 , Article)The BA.4 and BA.5 subvariants of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) B.1.1.529 (omicron) variant have shown the capacity of escaping from neutralizing antibodies.1 These subvariants had an ... -
Protein tyrosine phosphatase 1B inhibition improves endoplasmic reticulum stress-impaired endothelial cell angiogenic response: A critical role for cell survival
( Spandidos publications , 2021 , Article)Endoplasmic reticulum (ER) stress contributes to endothelial dysfunction, which is the initial step in atherogenesis. Blockade of protein tyrosine phosphatase (PTP)1B, a negative regulator of insulin receptors that is ... -
Proteomic analysis of T. qataranse exposed to lead (Pb) stress reveal new proteins with potential roles in Pb tolerance and detoxification mechanism
( Frontiers Media , 2022 , Article)Soil lead (Pb) contamination is one of the environmental problems facing the modern world. Sources of Pb in soil include industrial activities such as mining and smelting processes, agricultural activities such as application ... -
Protocol for Preparing Synthetic Solutions Mimicking Produced Water from Oil and Gas Operations
( American Chemical Society , 2021 , Article)Produced water (PW) is the water associated with hydrocarbons during the extraction of oil and gas (O&G) from either conventional or unconventional resources. Existing efforts to enhance PW management systems include the ... -
Proton conducting blend membranes: physical, morphological and electronic properties
( Springer Verlag , 2017 , Article)Blend membranes of sulfonated poly(ether ether ketone) (SPEEK) and sulfonated polyetherimide (SPEI) have been prepared and investigated as a potential polymer electrolyte membrane (PEM) for direct methanol fuel cell (DMFC). ... -
Proxy reporting in education surveys: factors influencing accurate reporting in the 2012 Qatar Education Study
( Taylor & Francis (Routledge) , 2017 , Article)Proxy reporting is a common practice during survey data collection to increase response rates while reducing fieldwork costs, and agreement between proxies and self-reports is critical to make reliable and valid inferences. ... -
Pseudomonas aeruginosa: arsenal of resistance mechanisms, decades of changing resistance profiles, and future antimicrobial therapies.
( Future Medicine , 2015 , Article)Antimicrobial resistance is one of the most serious public health issues facing humans since the discovery of antimicrobial agents. The frequent, prolonged, and uncontrolled use of antimicrobial agents are major factors ...
