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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/).
Effect of pH on extraction rate at different (A) enzyme digestion times; (B) enzyme additions; (C) liquid/feed ratios; (D) digestion temperatures. (○: the extraction rate η < 44.00, ●: the extraction rate η ≥ 44.00).