Comparative Studies on Water Relations and Xeromorphic Structures of Some Plant Species in the Middle Part of the Desert Zone in China Water Status Change in Wood Drying Studied By Time-Domain NMR DISTILLATION AND MEASUREMENT OF TWO FORMS OF TRITIUM Determining the States of Water and Its Fraction in Frozen Populus ussuriensis and Pinus koraiensis Green Timbers Relationship Between Osmoregulation and Bacterial Wilt Resistance of Grafted Pepper Relationship Between Osmoregulation and Bacterial Wilt Resistance of Grafted Pepper