Fig. 4: Mould growing and sample morphology.
From: Acylation of agricultural protein biomass yields biodegradable superabsorbent plastics

Samples exposed to 100% RH: a, PPC, b PPC/25ED, c WG, d SAP. The white arrow in a point mould growing sites. e Images of PPC/25ED, and f commercial SAP particles after being exposed two weeks to 100% RH and then lyophilised. The white arrows in f point at some of the observed filaments connecting the SAP particles. The scale bar in the photographs represents 1 cm.