
N-alkylation of highly quaternized chitosan derivatives affects the paracellular permeation enhancement in bronchial epithelia in vitro
Keywords: A; surface area (cm2); ALI; air-liquid interface; CSLM; confocal scanning laser microscopy; DA; degree of acetylation; DQ; degree of quaternization; DS; degree of substitution; ER; permeation enhancement ratio; FBS; fetal bovine serum; FCS; fetal calf s