تصفح Research Units حسب العنوان
السجلات المعروضة 4213 -- 4232 من 4691
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The tundra phenology database: More than two decades of tundra phenology responses to climate change
( NRC Research Press , 2021 , Article)Observations of changes in phenology have provided some of the strongest signals of the effects of climate change on terrestrial ecosystems. The International Tundra Experiment (ITEX), initiated in the early 1990s, established ... -
Tungsten-molybdenum oxide nanowires/reduced graphene oxide nanocomposite with enhanced and durable performance for electrocatalytic hydrogen evolution reaction
( Elsevier Ltd , 2017 , Article)Hydrogen has attracted huge interest globally as a durable, environmentally safe and renewable fuel. Electrocatalytic hydrogen evolution reaction (HER) is one of the most promising methods for large scale hydrogen production, ... -
Tuning the Intermolecular Electron Transfer of Low-Dimensional and Metal-Free BCN/C60Electrocatalysts via Interfacial Defects for Efficient Hydrogen and Oxygen Electrochemistry
( American Chemical Society , 2021 , Article)The development of low-dimensional (LD) supramolecular materials with multifunctional electrocatalytic properties has sparked the attention of the catalysis community. Herein, we report the synthesis of a new class of 0D-2D ... -
Turkey and the GCC region in the aftermath of Al-Ula Summit
( Gulf Studies center - College of Arts & Sciences - Qatar University , 2021 , Conference Paper)The Al-Ula Summit of January 5, 2021, officially brought the most recent Gulf crisis to an end after almost four years. Saudi Arabia's leadership was crucial in the GCC decision to normalize relations with Qatar. Last-minute ... -
Turkey’s security role in the Gulf region: exploring the case of a newcomer
( Taylor and Francis Group , 2023 , Article)This study explores Turkey as a newcomer to Gulf security. It addresses why Turkish decision-makers want Turkey to play an elevated security role in the Gulf. It offers a holistic yet detailed outlook of Turkey’s potential ... -
Turkey’s Transition into Modernity and the Response of the ‘Ulamā’: The Case of Bediuzzaman Said Nursi
( Islamic Research Institute, Islamabad, Pakistan , 2023 , Article)Turkey’s transition into modernity is one of the earliest models of modernization in the Muslim world. A complex and controversial process involved significant changes to the country’s political, social, and cultural ... -
Turning point in COVID-19 severity and fatality during the pandemic: a national cohort study in Qatar
( BMJ Publishing Group , 2023 , Article)Objective To assess the evolution of COVID-19 severity and fatality in a unique setting that consistently applied, throughout the pandemic, rigorous and standardised criteria for defining severe COVID-19 outcomes. Methods ... -
Two new sponge species (Demospongiae: Chalinidae and Suberitidae) isolated from hyperarid mangroves of Qatar with notes on their potential antibacterial bioactivity.
( Public Library of Science , 2020 , Article)This study presents the taxonomic description of two new sponge species that are intimately associated with the hyperarid mangrove ecosystem of Qatar. The study includes a preliminary evaluation of the sponges' potential ... -
Two prolonged viremic SARS-CoV-2 infections with conserved viral genome for two months
( Elsevier , 2021 , Article)We document two cases of viremic and prolonged active infection with the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) where the viral genome was conserved for two months, but infection was with little or ... -
Two-stage cultivation of a Nannochloropsis mutant for biodiesel feedstock
( Springer Verlag , 2015 , Article)Optimization of mass microalgae cultures is required for the efficient production of biodiesel feedstock in terms of total fatty acid (TFA) content and a conducive fatty acid profile. A mutant strain of Nannochloropsis sp. ... -
Two-stage cultivation of N-rich and N-deprived Acutodesmus obliquus biomass: Influence of cultivation and dewatering methods on microalgal biomass used in anaerobic digestion
( Elsevier , 2016 , Article)Microalgae can be manipulated to accumulate certain cellular compounds of interest without the need for genetic modification - simply by controlling growth parameters such as nitrogen (N). Therefore, A. obliquus was ... -
The UAE's Disruptive Policy in Libya
( SETA Foundation , 2020 , Article)In the last decade, the United Arab Emirates (UAE) has emerged as a leading counter-revolutionary force in the Middle East. Feeling the heat of change in the region, the small, oil-rich Gulf country adopted an aggressive ... -
Ubiquitin-Related Modifier 1 (URM-1) Modulates Cx43 in Breast Cancer Cell Lines.
( MDPI , 2023 , Article)Gap-junction-forming connexins are exquisitely regulated by post-translational modifications (PTMs). In particular, the PTM of connexin 43 (Cx43), a tumor suppressor protein, regulates its turnover and activity. Here, we ... -
Ubiquitin-specific peptidase 37: an important cog in the oncogenic machinery of cancerous cells.
( BMC , 2021 , Article Review)Protein ubiquitination is one of the most crucial posttranslational modifications responsible for regulating the stability and activity of proteins involved in homeostatic cellular function. Inconsistencies in the ... -
Ultra-low Pt-decorated NiCu bimetallic alloys nanoparticles supported on reduced graphene oxide for electro-oxidation of methanol
( Cambridge University Press , 2018 , Article)The selectivity of catalyst is an essential factor in direct methanol fuel cells (DMFCs) and plays an important role to improve their performance. To this end, platinum (Pt)-based low-cost trimetallic catalysts have been ... -
Ultra-trace determination of 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell-ICP-MS/MS: Establishing a baseline for global fallout in Qatar soil and sediments
( Elsevier Ltd , 2016 , Article)The development of practical, fast, and reliable methods for the ultra-trace determination of anthropogenic radionuclides 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell inductively coupled ... -
Ultra-trace Measurements of 210Pb in natural occurring radioactive materials by ICP-MS
( Elsevier , 2010 , Article)Collision cell inductively coupled plasma mass spectrometry (CC-ICP-MS) was investigated as a possible alternative to nuclear analytical techniques for the determination of 210Pb. The formation of isobaric and polyatomic ... -
Ultrahigh capacitive deionization performance by 3D interconnected MOF-derived nitrogen-doped carbon tubes
( Elsevier B.V. , 2020 , Article)The design of new-family carbon materials to capture more saline ions is one of the biggest challenges of capacitive deionization (CDI) for water desalination. Herein, we demonstrate the preparation of integrated tubular ... -
Ultrasensitive Ti3C2TX MXene/chitosan nanocomposite-based amperometric biosensor for detection of potential prostate cancer marker in urine samples
( MDPI AG , 2020 , Article)Two-dimensional layered nanomaterial Ti3C2TX (a member of the MXene family) was used to immobilise enzyme sarcosine oxidase to fabricate a nanostructured biosensor. The device was applied for detection of sarcosine, a ... -
Ultrasound controlled paclitaxel releasing system—A novel method for improving the availability of coronary artery drug coated balloon
( Wiley , 2020 , Article)Objectives: The aim of this study is to improve local-drug delivery efficiency and tissue absorption using the ultrasound (US)-responsible drug coating based on a newly developed US-controlled paclitaxel release balloon. ...