يعرض 621 - 640 نتائج من 805 نتيجة بحث عن '(( 50 ((mean decrease) OR (a decrease)) ) OR ((( 1 b decrease ) OR ( a stem decrease ))))*', وقت الاستعلام: 0.19s تنقيح النتائج
  1. 621
  2. 622
  3. 623
  4. 624
  5. 625
  6. 626

    Role of organic cation in modern lead-based perovskites حسب Alwarappan G.

    منشور في 2019
    "…Hybrid organic-inorganic metal perovskites (ABX3, A- organic cation, B-metal ion, X-halide ion) have shown significant potential as thin-film solar cells or Dye solar cells (DSC) materials. …"
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  7. 627

    Efficacy of FRCM systems in flexural strengthening of RC T-beams حسب Wakjira T.G.

    منشور في 2018
    "…Eight T-shaped RC beams with two different flexural reinforcement ratios (?s = 0.40% and ?s = 1.02%) were constructed and tested as simply supported under monotonic three-point loading. …"
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  8. 628
  9. 629
  10. 630
  11. 631
  12. 632

    Fish communities and environmental variables during dry season in Pampanga estuary (Philippines) حسب Abroguena, Jeff Bogart R.

    منشور في 2020
    "…The aims were: (a) to examine the variations of fish diversity and community structure, in relation to neap and spring tides and estuary zones and; (b) to examine the influence of environmental variables on fish communities. …"
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  13. 633
  14. 634

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

    منشور في 2019
    "…The activity and product selectivity and stability for methanation reaction on Ni/SiO2 and Cu/SiO2 catalysts have been evaluated using a flow reactor between 50ºC - 650ºC. The as-synthesized catalysts were characterized using XRD, SEM, TEM to understand the structural properties. …"
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  15. 635
  16. 636

    Enhanced oil recovery using hyperbranched polyglycerol polymer-coated silica nanoparticles حسب Elmobarak W.F.

    منشور في 2021
    "…The adsorption of oil on the PSiMNPs follows Freundlich isotherm with maximum adsorption capacity (qmax) of 192.8 g/mg and Langmuir constant (b) of 28.06 mg/L for Coil = 900 mg/L. The qmax of the recycled PSiMNPs slightly decreased to 189.08 g/mg. …"
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  17. 637
  18. 638
  19. 639

    Long-term performance analysis and power prediction of PV technology in the State of Qatar حسب Touati F.

    منشور في 2017
    "…Results show that due to panel dusting for eight months, the PV output power decreased by 50%. Also, owing to lower ambient temperatures, clearer sky and cleaner panels due to occasional rainfall, the PV panels show higher output power in Winter than in Summer season. …"
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  20. 640

    Selective adsorption of carbon dioxide, methane and nitrogen using resorcinol-formaldehyde-xerogel activated carbon حسب Awadallah, Ahmed

    منشور في 2017
    "…Adsorption/desorption isotherms of CO2, CH4, and N2 gases onto RF-ACX adsorbent were measured gravimetrically by a magnetic suspension microbalance at five different temperatures (20, 30, 40, 50 and 60 °C) in the pressure range of 0–1 MPa. …"
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