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Dimensionless Ratio > Logarithm Of Octanol Water Partition Coefficient > Unitless > Parts per billion
Count > Unitless > Parts per billion
Dimensionless Ratio > Unitless > Parts per billion

优选词，正式主题词

61Parts per billion  

定义

  • Dimensionless unit for concentration. Recommended practice is to use specific units such as $ug/l$.

上位概念

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https://vocab.sentier.dev/units/unit/PPB

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