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Total polyphenol content of water and ethanolic extracts of R. canina (can), R. gallica (gall), R. rugosa (rug) and R. spinosissima (spin); means ± SD; 1 = location 1 (Gödöllő), 2 = location 2 (Szeged). GAE: gallic acid equivalent; DW: dry weight.
