College of Arts & Sciences: المرسلات الحديثة
السجلات المعروضة 321 -- 340 من 3641
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Determination of midodrine hydrochloride via Hantzsch condensation reaction: A factorial design based spectrophotometric approach
( Royal Society of Chemistry , 2015 , Article)A set of experimental designs was executed to attain the optimal reaction parameters of chemical derivatization of midodrine hydrochloride (MD·HCl) in oral formulas via a Hantzsch condensation reaction. The process variables, ... -
Investigating the individual interests of undergraduate students in STEM disciplines
( Frontiers Media SA , 2024 , Article)Despite massive investments in the education sector to empower youth in Qatar, a vital concern remains to retain students in science, technology, engineering, and mathematics (STEM) disciplines at the undergraduate level. ... -
Microstructural investigation of gamma-irradiated ultra high molecular weight polyethylene in nitrogen atmosphere
( Trans Tech Publications , 2010 , Conference)In this paper the results of structural changes in ultra high molecular polyethylene (UHMWPE) upon gamma irradiation and storage in nitrogen environment are reported. Based on differential scanning calorimetry (DSC), wide ... -
Effect of gamma irradiation on the microstructure and morphology of polyethylene oxide and polyvinyl alcohol blends
( Trans Tech Publications , 2010 , Conference)Thin films of a blend of 90, 75, 50 (wt/wt%) percentage of polyethylene oxide and polyvinyl alcohol were synthesized and irradiated with 5, 25, 50, 100 and 200 kGy. The presence of PVA leads to diffusion controlled mechanism ... -
Membrane solubilization in erythrocytes as a measure of radiation exposure to fast neutrons
( IOP Publishing , 1999 , Article)Membrane solubilization and osmotic fragility of rat erythrocytes irradiated in vivo with fast neutron fluences ranging from 106 to 5 x 107 n cm-2 using a 252Cf source were measured instantaneously using a light scattering ... -
Pottery from Halat Aobeer and Hazem Al-Jasrah, Qatar
( Elsevier , 2013 , Article)In this paper the results of investigations on six archaeological ceramic sherds of the most common Islamic earthenware from the site of Halat Aobeer and Hazam Al-Jasrah are presented. The data was obtained by using a ... -
Characterizing the effective reproduction number during the COVID-19 pandemic: Insights from Qatar's experience
( Edinburgh University Global Health Society , 2022 , Article)Background The effective reproduction number, Rt, is a tool to track and understand pandemic dynamics. This investigation of Rt estimations was conducted to guide the national COVID-19 response in Qatar, from the onset of ... -
Currently Used Microbes and Advantages of Using Genetically Modified Microbes for Ethanol Production
( Elsevier , 2018 , Book chapter)Advancement in biotechnological methods has increased the potential for the commercial development of second-generation biofuels from lignocellulosic biomass. In this regard, the methods related to pretreatment of ... -
Recent advances in synthesis of functionalized β-lactams through cyclization of N-propargyl amine/amide derivatives
( Bentham Science Publishers B.V. , 2018 , Article Review)β-lactams have attracted a significant attention due to their potential biological activities and wide variety of synthetic applications. Developing novel and efficient methods for construction of functionalized β-lactams ... -
Whole-Genome Sequence Data Analysis of Anoxybacillus kamchatkensis NASTPD13 Isolated from Hot Spring of Myagdi, Nepal
( Hindawi Limited , 2021 , Article)Anoxybacillus kamchatkensis NASTPD13 isolated from Paudwar hot spring of Myagdi, Nepal, upon morphological and biochemical analysis revealed to be Gram-positive, straight or slightly curved, rod-shaped, spore-forming, ... -
Nanostructures Formed by Custom-Made Peptides Based on Amyloid Peptide Sequences and Their Inhibition by 2-Hydroxynaphthoquinone
( Frontiers Media S.A. , 2020 , Article)Extensive research on amyloid fibril formations shows that certain core sequences within Aβ peptide play an important role in their formation. It is impossible to track these events in vivo. Many proteins and peptides with ... -
Phytochemical Analysis of Anastatica hierochuntica and Aerva javanica Grown in Qatar: Their Biological Activities and Identification of Some Active Ingredients
( MDPI , 2023 , Article)Plant-derived compounds and their extracts are known to exhibit chemo preventive (antimicrobial, antioxidant and other) activities. The levels of such chemo preventive compounds vary depending on environmental factors, ... -
The use of microbial fuel cell for efficient treatment of cauliflower waste and generation of electricity
( Taylor and Francis Ltd. , 2023 , Article)Microbial fuel cell (MFC) is an alternative way for household organic waste treatment as it produces sustainable clean energy. Chemical parameters of the cauliflower leaf waste before treatment were 143.5 mg/g COD, 0.90 ... -
In silico-designed antimicrobial peptide targeting MRSA and E. coli with antibacterial and antibiofilm actions
( Springer Nature , 2024 , Article)Antibiotic resistance is a paramount global health issue, with numerous bacterial strains continually fortifying their resistance against diverse antibiotics. This surge in resistance levels primarily stems from the overuse ... -
Diving into the vertical dimension of elasmobranch movement ecology
( American Association for the Advancement of Science , 2022 , Article)Knowledge of the three-dimensional movement patterns of elasmobranchs is vital to understand their ecological roles and exposure to anthropogenic pressures. To date, comparative studies among species at global scales have ... -
Toxicity assessment of di(2-ethylhexyl) phthalate using zebrafish embryos: Cardiotoxic potential
( Elsevier , 2024 , Article)Plasticizers are considered as newly emerged contaminants. They are added to plastics to increase their flexibility and softness. Phthalate plasticizers including the Di-2-ethylhexyl phthalates (DEHP) are toxic and induce ... -
Interactions between marine megafauna and plastic pollution in Southeast Asia
( Elsevier B.V. , 2023 , Article Review)Southeast (SE) Asia is a highly biodiverse region, yet it is also estimated to cumulatively contribute a third of the total global marine plastic pollution. This threat is known to have adverse impacts on marine megafauna, ... -
Socio-cultural relationship between recreational sea anglers and blue sharks (Prionace glauca) in the United Kingdom
( Elsevier Ltd , 2023 , Article)The blue shark (Prionace glauca) is commonly caught by recreational anglers around the United Kingdom (UK) – part of a population (North Atlantic) which has sustained declines of > 50% over the last three generations (36 ... -
A first look at whale sharks in Hawaiian waters: Using citizen science to study the world's largest fish, Rhincodon typus
( John Wiley and Sons Ltd , 2023 , Article)The world's largest fish, the whale shark (Rhincodon typus), is a circum-tropically distributed and globally endangered species, that is widely studied at predictable aggregation sites. The main Hawaiian Islands are not ... -
Recycling of gas-to-liquid sludge as a potential organic amendment: Effect on soil and cotton properties under hyperarid conditions
( Elsevier , 2023 , Article)Gas-to-liquid (GTL) sludge is a specific wastewater treatment by-product, which is generated during the industrial process of natural gas conversion to transportation fuels. This least studied sludge is pathogen-free and ...
