يعرض 621 - 640 نتائج من 1,832 نتيجة بحث عن '(( 50 ((nn decrease) OR (a decrease)) ) OR ((( 10 10 decrease ) OR ( a systematic decrease ))))*', وقت الاستعلام: 0.21s تنقيح النتائج
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    Influence of nitrogen doping on the electrocatalytic activity of Ni-incorporated carbon nanofibers toward urea oxidation حسب Barakat, Nasser A.M.

    منشور في 2017
    "…Typically, the observed current densities using 1.0 M urea (in 1 M KOH) were 3.15, 29.7, 13.75, 47.55, 14.13 and 9.85 mA/cm2 for the nanofibers obtained from electrospun solutions having 0, 1, 2, 5, 7 and 9 wt% urea, respectively. …"
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    Environmental impacts of solar photovoltaic systems: A critical review of recent progress and future outlook حسب Tawalbeh M.

    منشور في 2021
    "…It was concluded that the carbon footprint of the PV system could be decreased further by one order of magnitude using novel manufacturing materials. …"
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