يعرض 661 - 680 نتائج من 1,761 نتيجة بحث عن '(( 5 ((nn decrease) OR (point decrease)) ) OR ( 10 ((meters decrease) OR (a decrease)) ))', وقت الاستعلام: 0.24s تنقيح النتائج
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    Changes in air quality during the first-level response to the COVID-19 pandemic in Shanghai Municipality, China حسب Bai, Yang

    منشور في 2020
    "…The results showed that air quality improved significantly During-FLR compared with Pre-FLR, with the concentrations of PM2.5, PM10, SO2, NO2, and CO all decreasing significantly. …"
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  19. 679

    Pilot-scale petroleum refinery wastewaters treatment systems: performance and microbial communities' analysis حسب Karray, Fatma

    منشور في 2020
    "…Decreasing HRT to 5 and 2.5 days led to a decrease in the efficiency of the process and a decrease in biomass concentration was also observed (<1000 mg/l). …"
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  20. 680