Study on the gas desorption law and indicator influencing factors of fixed-size coal samples.

Sci Rep · 2019 · PMC6868149 · PMID 31748537

Europe PMC DOI

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a decreasing trendno p-value reported

With increasing free desorption time, K 1 has a decreasing trend.

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an increasing trendno p-value reported

With the increase in the diffusion coefficient, K 1 shows an increasing trend; the larger the diffusion coefficient is, the more notable the change in K 1 is under different pressure conditions.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.