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Showing 121 - 140 results of 211 for search '(( 5 ppm decrease ) OR ((( 19 a decrease ) OR ((( 5 wt decrease ) OR ( i wt decrease ))))))', query time: 0.16s Refine Results
  1. 121

    Combined effects of treated domestic wastewater, fly ash, and calcium nitrite toward concrete sustainability by Abdelrahman Abushanab (17268940)

    Published 2021
    “…Test results revealed that TWW slightly decreased concrete compressive and flexural strengths by 5%–12%, whereas it dramatically increased the porosity and chloride permeability by about 40%. …”
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    Engineering the Surface and Mechanical Properties of Water Desalination Membranes Using Ultralong Carbon Nanotubes by Yehia M. Manawi (18091207)

    Published 2018
    “…More pronounced effect on membrane’s mechanical properties was observed due to compatibility of CNTs with PS matrix when compared to other factors (i.e., changes in the CNT aspect ratio). The water contact angle for PS membranes incorporated with commercial CNT sharply decreased from 73° to 53° (membrane hydrophilization) for membranes with 0.1 and 1.0 wt. % of CNTs, while for the same loading of produced CNTs the water contact angles for the membrane samples increased from 66° to 72°. …”
  4. 124

    Association between thermal responses, medical events, performance, heat acclimation and health status in male and female elite athletes during the 2019 Doha World Athletics Champi... by Sebastien Racinais (318896)

    Published 2022
    “…Athletes (63%) who performed 5–30 days heat acclimation before the competition: ranked better (18±13 vs 28±13, p=0.009), displayed a lower peak T<sub>core</sub> (39.4°C±0.4°C vs 39.8°C±0.7°C, p=0.044) and larger in-race decrease in T<sub>skin </sub>(−1.4°C±1.0°C vs −0.9°C±1.2°C, p=0.060), than non-acclimated athletes. …”
  5. 125

    Effect of Surface Treatment of Halloysite Nanotubes (HNTs) on the Kinetics of Epoxy Resin Cure with Amines by Vahideh Akbari (18768001)

    Published 2020
    “…Nonisothermal differential scanning calorimetry (DSC) analyses were performed on epoxy nanocomposites containing 0.1 wt.% of P-HNT, A-HNT, and F-HNT. Quantitative analysis of the cure kinetics of epoxy/amine system made by isoconversional Kissinger–Akahira–Sunose (<i>KAS</i>) and <i>Friedman</i> methods made possible calculation of the activation energy (<i>E</i><sub>α</sub>) as a function of conversion (α). …”
  6. 126

    Exploring urban growth–climate change–flood risk nexus in fast growing cities by Salah Basem Ajjur (14150967)

    Published 2022
    “…Surveying showed that, between 1984 and 2020, urban areas grew by 777%, and bare lands decreased by 54.7%. In addition, Doha witnessed various climatic changes with a notable increase in air temperature (+ 8.7%), a decrease in surface wind speed (− 19.5%), and a decrease in potential evapotranspiration losses (− 33.5%). …”
  7. 127

    The Effect of Chitosan’s Addition to Resorcinol/Formaldehyde Xerogels on the Characteristics of Resultant Activated Carbon by Ahmed Awadallah-F (825837)

    Published 2019
    “…The total pore volume decreased from 1.040 to 0.238 cm3/g and the total pore surface area decreased from 912.3 to 554.4 m2/g. …”
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    Coping strategies, optimism, and resilience factors associated with mental health outcomes among medical residents exposed to coronavirus disease 2019 in Qatar by Malek Smida (14777104)

    Published 2023
    “…</p> <h2>Conclusion</h2> <p>It seems that avoidant coping styles can exacerbate depressive, anxiety, and stress symptoms in medical residents amidst the COVID-19 pandemic. Strategies promoting optimism, resilience, and approach coping styles can decrease the mental health burden of the pandemic on medical residents.…”
  10. 130

    Unraveling the future productivity burden of cardiovascular disease in Qatar: Investigating the modifiable risk factors control in type 2 diabetes by Abushanab, Dina

    Published 2025
    “…AimsInsufficient risk factor control can lead to a loss of millions of productivity-adjusted life years (PALYs). …”
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  11. 131

    Genetic Deletion of DNAJB3 Using CRISPR-Cas9, Produced Discordant Phenotypes by Shadi Nejat (19457212)

    Published 2023
    “…Male and female KO and WT mice were fed a HF diet (45% kcal fat) for 16 weeks. …”
  12. 132

    How Tax Policies Affect Qatar's Foreign Direct Investment by Abi Man Joshi (21544817)

    Published 2024
    “…However, following the recent blockade of Qatar by other neighboring Gulf Cooperation Council (GCC) countries which went on for nearly three years, Qatar experienced decrease in foreign direct investment compounded by the recent global novel coronavirus disease 2019 (COVID-19) pandemic. …”
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  17. 137

    OSRA Grant Cycle 5 Public Reports : Project Title: Coping with prenatal bereavement and perceived stress in current pregnancy: correlates to parental perception of the child and bo... by Pia Tohme Khalaf (17425551)

    Published 2023
    “…<p dir="ltr">This study reveals a significant connection between prenatal bonding or attachment during pregnancy and various factors such as maternal age, anxiety, and stress, including those attributed to specific events like the COVID-19 pandemic. …”
  18. 138

    Effect of surfactants on the convective heat transfer and pressure drop characteristics of ZnO/DIW nanofluids: An experimental study by Adnan Qamar (14421759)

    Published 2023
    “…Convective heat transfer (HTC) and flow characteristics (pressure drop (ΔP) and friction factor (f)) of aqueous ZnO NFs' within a circular mini tube (D i = 1.0 mm, L = 330 mm) were analyzed. Experiments were carried out under steady-state and varying flow rates using 0.012–0.048 wt % of NFs and sodium hexametaphosphate (SHMP) and acetylacetone (ACAC) as surfactants (SFs). …”
  19. 139

    Part II.: Dissimilar friction stir welding of nickel titanium shape memory alloy to stainless steel – microstructure, mechanical and corrosion behavior by Parker West (17268946)

    Published 2021
    “…Corrosion properties of the weld zone investigated in 3.5 wt. % NaCl solution showed moderately inferior corrosion resistance of dissimilar weld, compared to individual base metals, as characterized by the surface film impedance and corrosion current density. …”
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