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Retention of (a) pentoses, hexoses, and hydroxy acids and (b) β and γ fractions dependent on the MWCO of ultrafiltration membranes, exemplified with Sol2. NP010, UH004, and UP005 membranes were used at a pressure of 15 bar; UP010 and UP020 at a pressure of 5 bar; and UH005 at a pressure of 3 bar.
