Study on the Change of Dielectric Properties and Chemical-Mechanism during Coal Low-Temperature Oxidation.

Sci Rep · 2020 · PMC7069977 · PMID 32170158

Europe PMC DOI

hedged sentence

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may not be significantno p-value reported

However, for the volume of the pores were much smaller than the volume of the coal itself, the effect of the pore volume on the coal relative dielectric constant may not be significant.

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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.