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Effect of poly- and oligosaccharide fractions from Ulva sp. on total collagen synthesis evaluated by Red sirius assay. NHDF were cultured for 48 h with two concentrations (50 and 1000 µg/mL) of fractions (n = 6 and n = 7, respectively). Significant differences between fractions and control are indicated by * p < 0.05 and ** p < 0.01.
