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Protein transmission as a function of transmembrane pressure, ∆pTM, for skim milk microfiltration for spiral wound membrane (SWM; •), ceramic tubular membrane (CTM; △ τw = 76 Pa; ▲ τw = 127 Pa), and hollow fiber membrane (HFM; □ τw = 23 Pa; ■ τw = 48 Pa).
