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521
The spectral and morphological studies of the conductive polyaniline thin film derivatives by the in situ copolymerization
منشور في 2017"…The blue shift in the band indicates that there is a decrease in the extent of conjugation system along the copolymer. …"
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522
Centrifugal Compressor Spiral Dry Gas Seal Simulation Working at Reverse Rotation
منشور في 2013"…Unidirectional dry gas seal may experiences reverse rotation when equipped in a centrifugal compressor. This paper describes how the reverse rotation effects on the spiral unidirectional dry gas seal performance and pressure distribution inside the gas film, also an investigation of using a different herringbone shape grooves configurations has been done using ANSYS FLUENT 14.5 CFD simulation. …"
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523
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524
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525
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526
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527
Tobacco Use and Its Health Effects among Professional Athletes in Qatar
منشور في 2016"…The objective of the study was to determine the effects of tobacco use on selected markers of health and lung function in professional athletes. A total of 108 male professional athletes participated in the study from ten ball game teams in the same sport league in Qatar (age = 26.4 ± 5.1 yrs, height = 190.6 ± 11.9 cm, and weight = 91.5 ± 16.4 kg). …"
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528
Shear Behavior of Green Concrete Beams Reinforced with Basalt FRP Bars and Stirrups.
منشور في 2020"…The parameters investigated in this study are span to depth ratio (i.e. a/d =2.5 and 3.5), reinforcement ratio , stirrups spacing effect (i.e. 250 mm and 350 mm) and stirrups type (Steel and Basalt). …"
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529
Assessment of Urban Heat Islands Based on the Relationship Between Land Surface Temperature and Land Use/Land Cover in Greater Doha
منشور في 2020"…Furthermore %LULC of built up, vegetation, barren land, marsh land and water body were 29%, 4.5%, 58.6%, 2.8% and 5% in 2000 and 56.5 %, 8.2%, 33.2 %, 0% and 2.1% in 2019 respectively. …"
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530
Study the efficiency of Ultrasonic Technology in Removal of Algae from Surface Waters
منشور في 2024"…The dominant algae genus was identified using a light microscope, and ultrasound waves with a low frequency of 40 kHz and a power density of 0.024 W/cm³ were applied at different time intervals (0 – 80 minutes) at time intervals of 5 minutes. …"
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531
Magnetorheological damper with external excitation for more efficient control of vehicles? dynamics
منشور في 2018"…The experimental tests made on the first prototype featuring this new technology was promising. The excitation of a set of 12 coils surrounding the body of the damper, by an electric current of 5 A, managed to increase the damping coefficient by up to 75%. …"
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532
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533
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534
Effect of mobile text messages on antiretroviral medication adherence and patient retention in early HIV care: An open-label, randomized, single center study in south Florida
منشور في 2020"…A significant increase in CD4 cell count and a decrease in HIV RNA were found at study end, with no differences between the two groups. …"
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535
High-Rate Anaerobic Digestion of Waste Activated Sludge by Integration of Electro-Fenton Process
منشور في 2020"…Production of biogas was also found to improve during semi-continuous fermentation of EF-pretreated sludge conducted in a lab-scale reactor. In comparison to raw sludge, EF-pretreated sludge produced the highest biogas yield (0.81 L biogas/g VS) with a high COD removal rate, reaching 96.6% at an organic loading rate (OLR) of 2.5 g VS/L. d. …"
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536
Effect of electroless bath composition on the mechanical, chemical, and electrochemical properties of new NiP-C 3 N 4 nanocomposite coatings
منشور في 2019"…An electroless bath of 0.5 g L−1 C3N4 offered a nanocomposite coating with the highest microhardness and superior corrosion resistance. …"
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537
Thermodynamic analysis of solar-driven chemical looping steam methane reforming over Cr2O3/Cr redox pair
منشور في 2019"…The total solar energy required to drive the CS process (Q-solar-CS) rises by 1498.8 kW as the CH4/Cr2O3 molar ratio upsurges from 0.5 to 3. In case of the CSH process, when the TL increases from 500 to 1400 K, the Q solar CSH decreases by 54.5 kW and further surge in the TL from 1400 to 2050 K yields into upturn in the Q-solar-CSH by 108.5 kW. …"
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538
Fecal Carriage and Molecular Characterization of Carbapenemase-Producing Enterobacterales in the Pediatric Population in Qatar
منشور في 2021"…The mean quarterly incidence of fecal carriage decreased more than 6-fold after the implementation of coronavirus disease 2019 (COVID-19)-related international travel restrictions in Qatar in mid-March 2020. …"
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539
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540
The Interference of Notch1 target Hes1 affects cell growth, differentiation and invasiveness of glioblastoma stem cells through modulation of multiple oncogenic targets
منشور في 2017"…Herein, we report that exposure to a Stat3/5 inhibitor, induced apoptosis either in shHes1-CSC or control cells. …"
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