The increase of organic substance concentration has influence on the effect of inactivating the poliovirus.

有机物浓度增高可影响消毒剂对病毒的灭活效果。

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A new methodology for estimation of organic substance concentration in coastal Marine was proposed based on studies on geostatistics and geographic information system (GIS) software.

通过对地统计学的研究和地理信息系统(GIS)软件的应用，提出了一种基于环境监测数据的估计近海有机物浓度分布的新方法。

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This is because tomatoes contain a high concentration of a substance called lycopene, which is an antioxidant.

这是因为番茄中含有高浓度的番茄红素，是一种抗氧化剂。

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Prototypes built by researchers at the Naval Research Laboratory, Stanford University and Philips, a Dutch electrical-goods firm, can detect a substance that is present at a concentration of less than one part in a million billion.

ECONOMIST: Labs on a chip

"Additional documentation indicates he refused to submit to a chemical analysis to determine alcohol concentration or presence of an impairing substance at the time of the citation, " the company said.

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