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. 2020 Apr 20;9(4):337. doi: 10.3390/antiox9040337

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© 2020 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 (http://creativecommons.org/licenses/by/4.0/).

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Overlaid average FTIR ATR spectrum of investigated propolis collected from five Adriatic Sea islands (Krk, Rab, Pag, Biševo and Korčula)—fingerprint region (1800–600 cm⁻¹) emphasizing comparative spectral variations.