Freeze-drying of oleanolic acid-loaded nanosuspensions Effects of Long-term Cryopreservation on the Cytoactive of Two Insect Cell Lines SL2 and NIH-SaPe-4 STUDY ON PHYSIOLOGICAL AND BIOCHEMICAL CHARACTERISTICS OF CASTANEA HENRYI SEEDS AFTER CRYOPRESERVATION Cryopreservation of Calli of Arnebia euchroma Study of Cryopreservation on Cinnamomum cassia Excised Embryos