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Now showing items 17567-17586 of 50304
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Night and Early Morning Flying Insects in a Residence Backyard in Doha City, Qatar
( Qatar University , 2006 , Article)Night and early morning flying insects in Doha were recorded daily, for a complete year, using a light-water trap. Two peaks of insect numbers occurred in April-May and September-October periods respectively. The lowest ... -
Night Distribution Of Certain Species Of Coleoptera As Indicated By Captures In A Light Trap At Quena
( Qatar University , 1984 , Article)The night distribution of nineteen species over a whole trapping period can be considered under the following headings: a. Early flyers b. Species with two peaks of activity. The effect of light of low intensity, temperature ... -
Nine-level asymmetrical single phase multilevel inverter topology with low switching frequency and reduce device counts
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference Paper)This paper presents a new asymmetrical single-phase multilevel inverter topology capable of producing nine-level output voltage with reduce device counts. In order to obtain the desired output voltage, dc sources are ... -
Nine-Phase Six-Terminal Induction Machine Modeling Using Vector Space Decomposition
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)The nine-phase six-terminal induction machine (IM) has been recently proposed as a promising contender to the conventional asymmetrical six-phase type in terms of torque density, stator winding simplicity, and fault-tolerant ... -
Nine-phase six-terminal pole-amplitude modulated induction motor for electric vehicle applications
( Institution of Engineering and Technology , 2019 , Article)In electric drive applications that are based on high-speed induction motors (IMs) with an extended speed range, stator winding pole-changing is a possible technique to avoid oversizing the driving motor. The electronic ... -
Nip/Zno-Doped C3n4 Nanocapsules: A New Highly Corrosion-Resistant Electroless-Plated Coating with Superior Mechanical and Antibacterial Properties
(2021 , Master Thesis)Carbon nitride (C3N4) nanomaterials has superior mechanical, thermal and tribological properties, which make them attractive for various applications including corrosion resistant coatings. In this research, newly ... -
Nitrate removal from water using UV-M/S2O42- advanced reduction process
( Springer , 2013 , Article)In this work, a new process called advanced reduction process (ARP) was used for nitrate removal from water. This ARP process combines sodium dithionite as reducing agent with ultraviolet irradiation using medium pressure ... -
Nitric oxide releasing chitosan-poly (vinyl alcohol) hydrogel promotes angiogenesis in chick embryo model
( Elsevier B.V. , 2019 , Article)The lack of angiogenic activity is one of the serious complications of chronic wounds associated with delayed wound closure, chronic ulceration, and subsequent limb amputation. Multiple lines of evidence suggest that nitric ... -
Nitric Oxide Releasing Hydrogel Nanoparticles Decreases Epithelial Cell Injuries Associated With Airway Reopening
( Qatar University Press , 2021 , Poster)Introduction: Acute respiratory distress syndrome (ARDS) is an acute inflammatory lung condition. It is characterized by disruption of gas exchange inside the alveoli, accumulation of protein edema, and an increase in lung ... -
Nitric Oxide Releasing Hydrogel Nanoparticles Decreases Epithelial Cell Injuries Associated With Airway Reopening.
( Frontiers , 2021 , Article)Acute respiratory distress syndrome (ARDS) is an acute inflammatory lung condition. It is characterized by disruption of gas exchange inside the alveoli, accumulation of protein edema, and an increase in lung stiffness. ... -
Nitric oxide-releasing biomaterials for promoting wound healing in impaired diabetic wounds: State of the art and recent trends
( Elsevier Masson s.r.l. , 2022 , Article)Impaired diabetic wounds are serious pathophysiological complications associated with persistent microbial infections including failure in the closure of wounds, and the cause of a high frequency of lower limb amputations. ... -
Nitrogen and sulfur co-doped activated carbon nanosheets for high-performance coin cell supercapacitor device with outstanding cycle stability
( Springer , 2023 , Article)Herein, we report the utilization of nitrogen and sulfur dual heteroatoms co-doped activated carbon (NSAC) by hydrothermal method for electrochemical supercapacitors. Various NSACs were made by using a fixed amount of ... -
NITROGEN AND SULFUR– DOPED CARBON NANOFIBER MIXED OXIDES COMPOSITES FOR SUPERCAPACITOR APPLICATIONS
(2016 , Master Thesis)Energy storage devices including supercapacitor are among the rapidly growing field of alternatives for rechargeable batteries due to its high energy density and long life cyclability performance. Electrospinning is a ... -
Nitrogen fixation in polluted sea water of Alexandria coast, Egypt.
( Qatar University , 1990 , Article)The inshore area of the Mediterranean water, west of Alexandria, Egypt, is subjected to different types of pollutants. Nitrogen fixation rate was studied in this area in relation to some environmental factors such as pH, ... -
Nitrogen Transformations as affected by some factors at cultivated soils in Saudi Arabia
( Qatar University , 2001 , Article)The influence of serial concentration of salts (0.5, 1.0 and 1.5%), application of organic matter (0.5, 1.0 and 1.5% of wheat strat) and varying soil moisture content 50, 70 and 90%) on nitrification in sandy loam soil was ... -
Nitrogen Transformations As Affected By Some Factors at Cultivated Soils In Saudi Arabia
( Qatar University , 2000 , Article)The influence of serial concentration of salts (0.5, 1.0 and 1.5%), application of organic matter (0.5, 1.0 and 1.5% of wheat straw) and varying soil moisture content (50, 70 and 90%) on nitrification in sandy loam soil ... -
Nitrogen-fixing cyanobacteria as a potential resource for efficient biodiesel production
( Elsevier Ltd , 2020 , Article)The incessant utilization of non-renewable energy sources persistently pollutes the earth's atmosphere and thus requires the immediate substitution by renewable energy sources such as biofuel. In this study, several ... -
Nitrogenization of Biomass-Derived Porous Carbon Microtubes Promotes Capacitive Deionization Performance
( Chemical Society of Japan , 2021 , Article)Nitrogenization of porous carbon provides an effective methodology to promote capacitive deionization (CDI) performance. Exploring a new class of nitrogen-doped porous carbons from waste biomass over commercially available ... -
Nitron tetrachloroaurate(III) electrodes with poly(vinyl chloride) and liquid membranes for the selective determination of gold
( Elsevier , 1991 , Article)PVC matrix and liquid membrane electrodes have been developed for direct potentiometric determination of gold(III). The membranes incorporate nitron tetrachloroaurate(III) as electroactive material. Fast response for ... -
NMR Spectroscopy Database and Searching System
( Qatar University Press , 2020 , Poster)NMR spectroscopy is the most important analytical technology for organic compounds and plays the key role for the chemical characterizations and identifications in chemistry, pharmacy, materials science, environments, ...