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. 2022 Oct 31;13(11):1876. doi: 10.3390/mi13111876

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© 2022 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) Raw spectra of (a1) oil-in-water and (a2) oil-in-mint aqueous extracts. (b) (b1) SNV preprocessed spectra of oil-in-water emulsions and (b2) MSC preprocessed spectra of oil-in-mint aqueous extract emulsions.