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السجلات المعروضة 18067 -- 18086 من 52941
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Neutralizing antibodies against SARS-CoV-2 are higher but decline faster in mRNA vaccinees compared to individuals with natural infection.
( Oxford University Press , 2022 , Article)Waning protection against emerging SARS-CoV-2 variants by pre-existing antibodies elicited due to current vaccination or natural infection is a global concern. Whether this is due to the waning of immunity to SARS-COV-2 ... -
Neutron Diffraction and Mossbauer Effect Study of a Cobalt Substituted Zinc Ferrite
( Qatar University , 1982 , Article)The mixed cubic ferrite Zno.g5 €00.15 Fez 04 is studied by neutron diffraction and Mossbauer effect techniques at the temperature range 4.2 - 293 °K. The obtained spectra by both methods at low temperature show a long range ... -
Neutron Diffraction And Mossbauer Effect Study On A Mixed Rare Earth Garnet
( Qatar University , 1983 , Article)A powder sample of Y^YbFesO,; was prepared using the ceramic technique. X-ray diffraction pattern showed a single phase of the garnet type structure with a lattice constant 12.323 A". Specific heat for this composition was ... -
Neutron diffraction studies of the Na-ion battery electrode materials NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3
( Academic Press Inc. , 2016 , Article)The new compounds NaCoCr2(PO4)3, NaNiCr2(PO4)3, and Na2Ni2Cr(PO4)3 were synthesized by sol-gel method and their crystal structures were determined by using neutron powder diffraction data. These compounds were characterized ... -
Neutrophil Gelatinase Associated Lipocalin: Is not an Early Marker Inductor for Diabetic Nephropathy in Qatari Population
( BJSTR , 2019 , Article)Background: The WHO Global Report on Diabetes (2016) showed that the number of diabetic patients quadrupled between 1980 and 2016, while causing the death of 1.5 million people. While the global prevalence of diabetes ... -
New 3-Cyano-2-Substituted Pyridines Induce Apoptosis in MCF 7 Breast Cancer Cells
( Multidisciplinary Digital Publishing Institute (MDPI) , 2016 , Article)The synthesis of new 3-cyano-2-substituted pyridines bearing various pharmacophores and functionalities at position 2 is described. The synthesized compounds were evaluated for their in vitro anti-cancer activities on five ... -
New Algorithms For Digital Analysis Of Power Intensity Of Non Stationary Signals
( Qatar University , 1998 , Article)Discrete and continues time-frequency algorithms of the power intensity of non-stationary signals are proposed. Results show that the power intensity waveform analysis performed well in both discrete and continuous ... -
A new angle determination method for resolvers
( IEEE , 2008 , Conference Paper)A new low cost method for converting the amplitudes of the sine/cosine signals generated by the resolver into a measure of the angle of its shaft. The new method operates without lookup tables (LUT), and takes advantage ... -
New anti-corrosion inhibitor (3ar,6ar)-3a,6a-di-p-tolyltetrahydroimidazo[4,5-d]imidazole-2,5(1 h,3h)-dithione for carbon steel in 1 M HCl medium: gravimetric, electrochemical, surface and quantum chemical analyses
( Elsevier B.V. , 2020 , Article)The inhibition of (3ar,6ar)-3a,6a-di-p-tolyltetrahydroimidazo[4,5-d]imidazole-2,5(1 h,3h)-dithione (TTHIIDT) for carbon steel was full characterized in a 1 M hydrochloride acid environment at various inhibitor concentrations ... -
A new approach of clustering based machine-learning algorithm
( Elsevier B.V. , 2005 , Article)Machine-learning research is to study and apply the computer modeling of learning processes in their multiple manifestations, which facilitate the development of intelligent system. In this paper, we have introduced a ... -
NEW APPROACH OF PIPELINES JOINING USING FIBER REINFORCED PLASTICS COMPOSITES
(2018 , Master Thesis)It is well known that maintenance of pipelines failures due to leakage or rupture caused by either corrosion or lack of strength is a significant challenge for pipelines engineers. Pipelines joining is considered as a ... -
The New Arab Media: Technology, Image and Perception
( Ithaca Press , 2011 , Book)The New Arab Media: Technology, Image and Perception provides a valuable introduction and analysis of some of the most important issues surrounding the new media revolution in the Middle East. In particular, the book ... -
New Bacillus thuringiensis toxin combinations for biological control of Lepidopteran larvae
( Elsevier B.V. , 2014 , Article)Cyt1Aa from Bacillus thuringiensis israelensis is known by its synergistical activity with B. thuringiensis and Bacillus sphaericus toxins. It is able to improve dipteran specific toxins activity and can prevent or overcome ... -
New centre at QU to inspire volunteers
( Dar Al Sharq Group , 2012 , Article) -
New characteristics of optimal solutions for the two-machine flowshop problem with unlimited buffers
( Taylor and Francis Ltd. , 2019 , Article)The two-machine flowshop problem with unlimited buffers with the objective of minimising the makespan (F2||Cmax) is addressed. Johnson’s algorithm finds optimal solutions (permutations) to this problem, but are not necessarily ... -
New clinical approaches and emerging evidence on immune-checkpoint inhibitors as anti-cancer therapeutics: CTLA-4 and PD-1 pathways and beyond
( Begell House Inc. , 2019 , Article)The development of immune checkpoint blockers, primarily comprising the anti-PD-1/anti-PD-L1 and anti-CTLA-4 monoclonal antibodies, has formed the therapeutic landscape of quite a few different cancer types. In spite of ... -
New combination of simple additive and entropy weighting criteria for the selection of best substitution box
( IOS Press BV , 2021 , Article)Substitution boxes (S-boxes) are among the most widely recognized and fundamental component of most modern block ciphers. This is on the grounds that they can give a cipher fortifying properties to oppose known and possible ... -
A new construction technique of a triangle-free 3-colored K16’s
( Elsevier Inc , 2006 , Article)In this paper, we propose a new coloring technique of the edges of the complete graph on 16 vertices, K16, with three different colors, without producing any monochromatic triangle. This method is totally different from ... -
New Contributions To The Geology, Geochemistry And Tectonic Setting Of The Aswan Granites, Southern Egypt
( Qatar University , 1990 , Article)The Aswan granitic rocks occupy a region in southern Egypt between the stable Archaean craton of the south Western Desert and the less stable Pan-African belt of the south Eastern Desert. They include light-grey medium ...
