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. 2023 Apr 18;28(8):3544. doi: 10.3390/molecules28083544

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© 2023 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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Principal component analysis (PCA) results: (a) the score plot generated by the two principal components indicating the difference between species; (b) the loading plot showing the variables that contribute to each one of the two principal components. The nomenclature of the varibles are as follows: (1) total phenolic content; (2) TEAC; (3) DPPH; (4) CUPRAC; (5) hydroxycinnamic acid 1; (6) flavonol 1; (7) flavonol 2; (8) flavonol 3; (9) flavonol 4; (10) flavonol 6; (11) flavonol 7; (12) anthocyanin 1; (13) total flavonoid content; (14) catechin; (15) total anthocyanins; (16) total protein content; (17) nitrogen content; (18) intensity of colour; (19) tone; (20) %yellow; (21)%red; (22)%blue; (23) a parameter; (24) b parameter; (25) L parameter; (26) C parameter; (27) h parameter; (28) potassium content; (29) calcium content; (30) magnesium content; (31) phosphorus content; (32) ORAC; (33) organic acid 1; (34) organic acid 2; (35) organic acid 3; (36) ascorbic acid content; (37) total organic acids.