Showing 241 - 260 results of 289 for search '(( i x decrease ) OR ( 100 ((we decrease) OR (((mean decrease) OR (a decrease)))) ))', query time: 0.15s Refine Results
  1. 241

    Effect of reinforcement concentration on the properties of hot extruded Al-Al2O3 composites synthesized through microwave sintering process by Reddy, M. Penchal

    Published 2017
    “…Results showed that, as the content of hard ceramic particles increases, it improves overall mechanical properties including microhardness, 0.2% yield strength, ultimate compression/tensile strength, and Young's modulus while the ductility and co-efficient of thermal expansion decreases. XRD patterns and SEM/EDS mapping images show a uniform distribution of Al2O3 particles in the Al matrix. …”
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  2. 242

    The Role of Key Impurity Elements on the Performance of Aluminium Electrolysis -Current Efficiency and Metal Quality by Al-Mejali, Jassim Ali

    Published 2016
    “…The mass transfer coefficient for silicon was determined to be 3.1 x 10-5 m/s. Mass balance for phosphorus was carried out. …”
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  3. 243

    Driver Drowsiness Detection Study using Heart Rate Variability analysis in Virtual Reality Environment by Chowdhury, Muhammad E.H.

    Published 2018
    “…As it can be seen from Fig. 4, there is a significant difference in the LF/HF ratios, as it decreased drastically from 4.164 (Fig. 4A) when subject was awake to 1.355 (Fig. 4B) when subject was drowsy. …”
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  4. 244

    Membrane solubilization in erythrocytes as a measure of radiation exposure to fast neutrons by Monem, A Soltan

    Published 1999
    “…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 technique. …”
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  5. 245

    Microstructure and compressive behavior of Al-Y2O3 nanocomposites prepared by microwave-assisted mechanical alloying by Mattli M.R.

    Published 2019
    “…The mechanical properties of the Al–Y2O3 nanocomposites increased as the addition of yttria reached to 1.5 vol. % and thereafter decreased. The microhardness first increased from 38 Hv to 81 Hv, and then decreased to 74 ± 4 Hv for 1.5 vol. % yttria. …”
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  6. 246

    Development of Inorganically Cross-Linked Sulfonated Polyacrylamide Preformed Particle Gels for Conformance Control: Impact of Anionic Groups by Elaf, Reem

    Published 2024
    “…These PPGs function as superabsorbents, capable of absorbing water at a ratio of 100-700 times their dry weight while maintaining adequate gel strength up to 2709 Pa. …”
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  7. 247

    Enhancing thermal and mechanical response of aluminum using nanolength scale TiC ceramic reinforcement by Reddy M.P.

    Published 2018
    “…the present work, nano-sized titanium carbide (0.5, 1.0 and 1.5 vol%) reinforced aluminum (Al) metal matrix composites were synthesized by powder metallurgy incorporating microwave sintering and hot extrusion. …”
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  8. 248

    Highly active, durable and pH-universal hybrid oxide nanocrystals for efficient oxygen evolution by Ahmad, Yahia H.

    Published 2017
    “…Herein, hybrid Ptx-NiMnO3 nanocrystals (NCs) (x = 0.1, 0.5, and 1.0 mM) were synthesized by a modified citrate-gel approach and utilized as efficient catalysts towards the oxygen evolution reaction (OER). …”
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  9. 249
  10. 250

    Effect of coronavirus-19 restrictions in male handball players: Physical activity, sedentary behavior, and satisfaction with life by Hermassi, Souhail

    Published 2021
    “…All PA variables (vigorous, moderate, walking, total PA) were negatively influenced, but no interaction effects (IE; region x time) were observed. Sitting time increased from 2.5 to 4.9 h∙weekday−1 (ηp2 = 0.80) and walking time decreased from 66.8 to 33.5 min∙day−1 (ηp2 = 0.83). …”
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  11. 251

    Enhancing the corrosion resistance of reinforcing steel under aggressive operational conditions using behentrimonium chloride by Radwan A.B.

    Published 2019
    “…Also, the adsorption and influence of the inhibitor on the metal surface are characterized using the scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy. In conclusion, this new inhibitor shows high corrosion inhibition efficiencies under different aggressive conditions and can be used in concrete to reduce the corrosion rate of reinforcing steel without decreasing the mechanical properties of the concrete. - 2019, The Author(s).…”
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  12. 252

    Impact of fines type on gas flow using 3D micro-computed tomography by Al-Raoush, Riyadh

    Published 2019
    “…The pores in which gas flow through are reconstructed using 3D synchrotron X-ray micro- computed tomography images of sand sediments, at resolution of 3.89 micron per voxel. …”
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  13. 253

    Impact of fines type on gas flow using 3D micro-computed tomography by Al-Raoush, Riyadh

    Published 2019
    “…The pores in which gas flow through are reconstructed using 3D synchrotron X-ray micro- computed tomography images of sand sediments, at resolution of 3.89 micron per voxel. …”
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  14. 254

    Prevalence and Phylogenetic Analysis of Parvovirus (B19V) among Blood Donors with Different Nationalities Residing in Qatar by Abdelrahman, Doua

    Published 2021
    “…B19V genotyping showed a predominance of Genotype 1 (100%). Sequence analysis of the NS1-VP1u region revealed 139 mutation sites, some of which were amino acid substitutions. …”
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  15. 255

    Trends and Appropriateness of Sodium-glucose Co-transporter 2 Inhibitors Use in Qatar by Zaghloul, Nancy

    Published 2023
    “…Empagliflozin prescribing showed an increase over dapagliflozin, which decreased by the end of 2018. SGLT2is were prescribed for appropriate indication in 400 (100%) patients studied, while inappropriate dosing was found in 13 (3%) patients. …”
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  16. 256

    Synthesis and characterization of nanocrystalline CoFe2O4-zirconia via propylene oxide aided sol-gel method by Bhosale R.R.

    Published 2018
    “…The prepared gels were aged, dried, and annealed at different temperatures (600 1000 C) and times (1 5 h). The annealed Co ferrite/ZrO2 powder was analyzed by powder X-ray diffraction (PXRD), Brunauer Emmett Teller surface area analysis, energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). …”
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  17. 257

    Emerging clay-aryl-gold nanohybrids for efficient electrocatalytic proton reduction by Jlassi, Khouloud

    Published 2018
    “…Successful intercalation was confirmed by the detection of F1s peak in X-ray photoelectron spectroscopy (XPS) at ∼689 eV, in line with fluorine in CF bonds, and the reduction of gold (III) into metallic gold. …”
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  18. 258

    Prospects Of Amino Acids And Ionic Liquids As Natural Gas Hydrate Inhibitors For Offshore Flow Assurance by Qureshi, M. Fahed Aziz

    Published 2018
    “…The effect of stirring on the hydrate crystal formation at different stirring rates (100-1400 RPM) was also investigated. It was found that a threshold limit exists for the stirring rate, above and below which no hydrate formation is likely to occur within the selected system. …”
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  19. 259

    Effect of the support on physicochemical properties and catalytic performance of cobalt based nano-catalysts in Fischer-Tropsch reaction by Ali, Sardar

    Published 2017
    “…Catalysts were prepared via a wet impregnation method and characterized by various analytical techniques such as transmission electron microscopy (TEM), temperature programmed reduction (H2-TPR), carbon dioxide temperature programmed desorption (CO2-TPD) and X-ray photoelectron spectroscopy (XPS). Fischer-Tropsch reaction (FTS) was carried out in a fixed-bed microreactor (220 �C and 1 atm and with H2/CO = 2 v/v, SV of 12 L/g h). …”
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  20. 260