The effect of concentration, mass of injected surfactant and injection opportunity on oil recovery were discussed.

讨论了表面活性剂质量分数、注入量、注入时机等参数对采油效果的影响。

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Effect of concentration on the granularity, and the optimal growing condition of sheet ZnO crystals were discussed.

阐述了浓度对于粒径大小的影响并得出片状氧化锌微晶生长的最佳条件。

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For rivers with lower concentration of suspended sediment, effect of concentration on settling velocity is inapparent.

对于含沙浓度较低的河流，浓度对沉速的影响不显著。

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One obvious explanation for the overwhelming Democratic majorities in big cities is the Curley effect with the corresponding concentration of Democratic constituencies like welfare recipients and unions, but there is more to it than that.

FORBES: What Explains The Partisan Divide Between Urban And Non-Urban Areas

The award winning Bengtsson, highly decorated by scientific bodies across the globe, also pointed out that the heating effect of carbon dioxide (CO2) is logarithmic, which means the higher the concentration is, the smaller the effect of a further increase.

FORBES: As The Economy Recesses, Obama's Global Warming Delusions Are Truly Cruel

The level of concentration in water had a "negligible effect" on people's uptake of the fluoride ion - responsible for increased risk of fractures, they said.

BBC: Fluoride 'does not cause fractures'