Under the same conditions, free radical concentration is more in soft wood than in hard wood due to the higher lignin content in the former.

相同条件下，针叶材自由基浓度大于阔叶材，这是由于前者木素成分大于后者的缘故。

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The free radical concentration (Ng) of kerogen is a valid index to study thermal maturation of organic matter and paleotemperature of sedimentary basin.

干酪根自由基浓度是研究有机质热演化的有效指标之一。也是研究沉积盆地古地温的热参数之一。

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In the high hydroxyl radical concentration system, these antioxidants may show antioxidant effect, but in the low hydroxyl radical concentration system, they may promote oxidation.

在羟基自由基浓度较高的体系，抗氧剂表现出抗氧化作用；而在羟基自由基浓度较低的体系，抗氧剂反而表现出促氧化性。

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Flying Dog advertises its status as the favoured drink of the celebrated radical journalist Hunter S Thompson, and a 2012 study found a positive correlation between the concentration of microbreweries in a state and its likelihood to vote for Barack Obama.

BBC: US craft beer: How it inspired British brewers