In general, with the increase of pyrolysis temperature, the yield of WVs showed a trend of decrease and then increase followed by a continuous decrease.
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Chemical constituents and antimicrobial activity of wood vinegars at different pyrolysis temperature ranges obtained from <i>Eucommia ulmoides</i> Olivers branches.
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The sentences
On the other hand, all the pictures showed an overall trend of first increase followed by decrease.