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. 2021 Aug 26;10(9):1362. doi: 10.3390/antiox10091362

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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(A)—The extract yield (g) per 1 g of dry powder of leaves depending on the temperature and pH. ^a—Significantly different from the water-ethanol extracts, 20 °C (p < 0.05); ^b—significantly different from the water-ethanol extracts, 40 °C (p < 0.05). (B)—Content of phenolic compounds (mg GAE/g of extract) in water-ethanol extracts of yacon leaves, depending on temperature and pH. ^a—Significantly different from the 0% ethanol, 20 °C (p < 0.05); ^b—significantly different from the 0% ethanol, 40 °C (p < 0.05); ^c—significantly different from the water-ethanol extracts, 20 °C (p < 0.05); ^d—significantly different from the 0% ethanol, 40 °C (p < 0.05); ^e—significantly different from the water-ethanol extracts, 40 °C (p < 0.05).