Fig.13
From: Effect of Lonicera edulis polysaccharide on reducing oral dyeing of lonicera edulis juice
Microscopic analysis of porcine tongue mucosa before and after staining A: Pig tongue mucosa before staining; B: Dyeing of pig tongue juice and soaking in saliva; C–E: Juice dyeing of pig tongue mucosa with polysaccharide, pectin, and casein under optimum conditions; F–H: The pig tongue mucosa was dyed with polysaccharide, pectin, and casein juice under the optimum conditions, followed by soaking in saliva