Fig. 6From: Coupling fermentation of glutamic acid and γ-polyglutamic acid and preparation of poly(amino acid) superabsorbent polymersThe surfaces of PASP SAPS (a) and γ-PGA-co-PASP SAPSs (b: PSI:PGA = 2:1; c: PSI:PGA = 1:1; d: PSI:PGA = 1:2).Back to article page