Intelligent Evaluation and Dynamic Prediction of Oyster Freshness with Electronic Nose Based on the Distribution of Volatile Compounds Using GC-MS Analysis.

Additionally, the relative content of aldehyde compounds shows a decreasing trend, while the relative content of acid compounds exhibits an initial decrease followed by an increase.

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At 12 °C, the absolute content of esters exhibited an increasing trend, although the relative content began to decline after the fifth day due to the production of additional substances.

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At 12 °C, the content of hydrocarbons showed a trend of first decreasing and then increasing.

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