يعرض 701 - 720 نتائج من 1,474 نتيجة بحث عن '(( 50 ((nn decrease) OR (a decrease)) ) OR ((( 1 i decrease ) OR ( a step decrease ))))*', وقت الاستعلام: 0.25s تنقيح النتائج
  1. 701

    Application of Fe3O4 magnetite nanoparticles grafted in silica (SiO2) for oil recovery from oil in water emulsions حسب Elmobarak W.F.

    منشور في 2021
    "…An excellent %ηdem ≥ 90% was achieved Coil in the range 50–2000 mg/L. Using an MDdose as low as 10 mg/L attained a %ηdem in the range of 93%–94.3% for O/W mixtures with Coil < 2000 mg/L, which slightly decreased to ∼90% for higher concentrations. …"
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  2. 702
  3. 703

    Numerical simulation of stall development into surge and stall control using air injection in centrifugal compressors حسب Halawa, Taher

    منشور في 2014
    "…Results showed finally that the surge margin can be increased by using the injection with angle of 30° and with injection mass flow rate of 1% of the design inlet mass flow rate and this causes the surge limit to shift from 4 kg/s to 3.9 kg/s.…"
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  4. 704

    Gas solubility and rheological behavior study of betaine and alanine based natural deep eutectic solvents (NADES) حسب Altamash T.

    منشور في 2018
    "…Natural deep eutectic solvent (NADES) produced herein this work by mixing betaine and alanine with lactic acid and malic acid with 1:1 M mixing ratios. Thermophysical properties including water content, thermal stability, density and gas solubility of CO2 and N2 were experimented at different isotherms for wide pressures range up to 50 bars. …"
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  5. 705

    THE ASSOCIATION BETWEEN SOFT DRINK CONSUMPTION AND BONE MINERAL DENSITY AMONG QATARI WOMEN: ANALYSIS OF QATAR BIOBANK DATA حسب HAMID, AAMNA MOHAMED IDREES ALI

    منشور في 2019
    "…With the rapid increase in longevity, osteoporosis is viewed as a global problem and recognized to be one of the most common diseases in both developed and developing world. …"
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  6. 706

    High-Rate Anaerobic Digestion of Waste Activated Sludge by Integration of Electro-Fenton Process حسب Feki, Emna

    منشور في 2020
    "…Following EF pretreatment, the pH, conductivity, soluble chemical oxygen demand (SCOD), and volatile fatty acids (VFA) increased to 7.5, 13.72 mS/cm, 4.1 g/L, and 925 mg/L, respectively. Capillary suction time (CST) analysis highlighted the dewaterability effect of EF on WAS, as demonstrated by the decrease in CST from 429 to 180 s following 30 min of pretreatment. …"
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  7. 707

    Impact of combined oil-in-water emulsions and particulate suspensions on ceramic membrane fouling and permeability recovery حسب Abdalla M.

    منشور في 2019
    "…The addition of 1500 mg·L−1 of bentonite to a 10 vol.% emulsion resulted in a permeability decrease of 3.5–5 times over that recorded for the emulsion, and 8–36 times lower than that of the bentonite suspension. …"
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  8. 708

    Negative emotional symptoms during COVID19 confinement: The relationship with reading habits حسب Alomari, Mahmoud A.

    منشور في 2022
    "…Results: A total of 1711 individuals participated in the study. About 60.0%, 55.1%, 60.5% and 61.0% reported participating in scientific, religious, general, and novel reading, respectively. …"
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  9. 709
  10. 710
  11. 711
  12. 712

    Socket Shield Technique to Improve the Outcomes of Immediate Implant: A Systematic Review and Meta-Analysis حسب Scarano, Antonio

    منشور في 2023
    "…Meta-analyses revealed that the immediate implants placed with SST had a statistically significant decrease in horizontal (MD = −0.28, 95% CI [−0.37, −0.19], p < 0.0001), vertical (MD = −0.85, 95% CI [−1.12, −0.58], p < 0.0001), and crestal (MD = −0.35, 95% CI [−0.56, −0.13], p = 0.002) bone loss, as well as probing depth (MD = −0.64, 95% CI [−0.99, −0.29], p = 0.0003). …"
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  13. 713

    Prevention of oral cancer حسب Malki, Ahmed Mohamed

    منشور في 2017
    "…In exploring the details within the chapter, one can conclude that oral cancer is a disease that is preventable and controllable but habitually has been given little significance due to many factors. …"
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  14. 714

    Finite element study of functionally graded porous femoral stems incorporating body-centered cubic structure حسب Alkhatib, Sami E.

    منشور في 2019
    "…The porosity of the stems was decreased distally according to the sigmoid function (n = 0.1, n = 1 and n = 10) with 3 grading exponents. …"
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  15. 715

    Synthesis of silica supported ni and cu catalyst for carbon dioxide methanation reaction حسب Aheed, Ahmed

    منشور في 2019
    "…In addition, the used catalysts after the reaction were characterized using similar techniques to evaluate the effect of reaction conditions on active phase and SiO2 support. The 1%Ni on SiO2 catalyst shows good activity for CO2 conversion to CH4 till 450ºC, thereafter CH4 formation decreased and CO increased and remains the only product at 650ºC. …"
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  16. 716

    Theoretical insight into effect of cation–anion pairs on CO2 reduction on bismuth electrocatalysts حسب Sun Hee, Yoon

    منشور في 2020
    "…This study presents theoretical insight into the mechanism of the CO2 reduction reaction (CO2RR) to formic acid (HCOOH) on Bi (012) surfaces in the presence of alkali metal cations (M+: Cs+, K+, and Li+) and/or halide anions (X−: Cl−, Br−, and I−) using density functional theory (DFT). The adsorption energy (Eads) and work function (Wf) of the anions increases with decreasing anion size (i.e., Cl− > Br− > I−). …"
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  17. 717

    Removal of copper ions from aqueous solution using NaOH-treated rice husk حسب Zafar S.

    منشور في 2020
    "…Up to 97% Cu removal was achieved in ct of 30 min using Dad of 0.3 g [Cu]i of 25 mg L?1 and T = 280 K. The ads of Cu on TRH is endothermic, spontaneous, follows Langmuir isotherms, and exhibited a PSO kinetics. …"
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  18. 718
  19. 719

    Burden of diabetes mellitus attributable to demographic levels in Qatar: An emerging public health problem حسب Bener, Abdulbari

    منشور في 2014
    "…Diabetes is one of the main contributors to ill health and premature mortality worldwide and its prevalence has been rising during the last decades. …"
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  20. 720

    An evidence base for school health policy during the covid-19 pandemic حسب Badran, S.

    منشور في 2021
    "…Further data suggested decreased childhood transmission from respiratory droplets and a low viral load among children. …"
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