يعرض 1 - 20 نتائج من 111 نتيجة بحث عن '(( 50 ppm decrease ) OR ((( 50 ng decrease ) OR ( 5 w decrease ))))', وقت الاستعلام: 0.14s تنقيح النتائج
  1. 1
  2. 2

    Wind energy potential along the onshore and offshore Qatar حسب Mohammed, Aboobacker Valliyil

    منشور في 2020
    "…Among the select locations, the highest annual mean wind power density is obtained in the o?shore Ruwais (152 W/m2), followed by o?shore Ras La?an (134 W/m2) and land area of Al Khor (120 W/m2). …"
    احصل على النص الكامل
    احصل على النص الكامل
  3. 3
  4. 4

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

    منشور في 2021
    "…dem improved as the Csur and pH decreased, with maximum values of 98.8% and 98.5% achieved at Csur = 0.05 g/L and a pH = 4, respectively. …"
    احصل على النص الكامل
    احصل على النص الكامل
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9

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

    منشور في 2021
    "…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. …"
    احصل على النص الكامل
    احصل على النص الكامل
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15

    Functionalization of silica-coated magnetic nanoparticles as powerful demulsifier to recover oil from oil-in-water emulsion حسب Elmobarak W.F.

    منشور في 2021
    "…This study presents an innovative approach for the preparation of Fe3O4 nanoparticles covered with SiO2 shell (denoted as Fe–Si-MNP), which were used to recover oil recovery from oil-in-water emulsion (O/W-emul). The Fe–Si-MNP were prepared with differing silica layer thicknesses (5 nm [Fe–Si-1], 8 nm [Fe–Si-2], 10 nm [Fe–Si-3], and 15 nm [Fe–Si-4]) and tested for the percentage of oil separation (%Soil) under different dosages (DMNP), oil concentration (Doil), surfactant dosages (Dsur), and pH. …"
    احصل على النص الكامل
    احصل على النص الكامل
  16. 16

    Mercury pollution in doha (Qatar) coastal environment حسب Al-Madfa, H.

    منشور في 1994
    "…1). Organic Hg (0.6 ng L?1) contributed only 5.0% of total Hg. Mercury showed a strong tendency to be associated with suspended matter in Doha coastal waters, as it represented about 73.0% of the total. …"
    احصل على النص الكامل
    احصل على النص الكامل
  17. 17

    Dynamics of Neisseria gonorrhoeae transmission among female sex workers and clients: A mathematical modeling study حسب Houssein H., Ayoub

    منشور في 2024
    "…Increasing condom use from 10 % to 50 % lowers NG prevalence among FSWs, clients, and their spouses from 12.2 % to 6.4 %, 1.2 % to 0.5 %, and 0.4 % to 0.2 %, respectively. …"
    احصل على النص الكامل
    احصل على النص الكامل
    احصل على النص الكامل
    article
  18. 18
  19. 19
  20. 20

    Mechanism and kinetics of electrochemical degradation of uric acid using conductive-diamond anodes حسب Dbira, Sondos

    منشور في 2016
    "…Interestingly, an almost total mineralization of 50ppm UA was obtained when anodic oxidation was performed at low current densities (20 mA cm–2) and in the presence of NaCl. …"
    احصل على النص الكامل
    احصل على النص الكامل