Periodic Acid-Schiff ReactionPeriodic AcidAlcian BluePolyethylene GlycolsHistocytochemistrySialomucinsGlycolsEthylene GlycolsHematoxylinMucinsStaining and LabelingCarbohydratesMucusPropylene GlycolGlycogenElectrophoresis, Polyacrylamide GelMicroscopy, ElectronGlycoproteinsImmunohistochemistryAmino AcidsMolecular WeightPropylene GlycolsHydrogelsButylene GlycolsDrug CarriersCryoprotective Agents