The Effect of High Altitude Treatment on Antioxidation Activity of Water Extract from Celosia argentea L. (Yellow Flower) Effects of Sunshine-shading, Leaf-cutting and Spikelet-removing on Yield and Quality of Rice in the High Altitude Region Effect of Sanpu Hongjingtian (Rhodiola sp) Cap sule on Erythrocyte Deformability and Oxygen Free Radical in Patients with High Altitude Polycythemia Effect of the carrying test by high space balloon on flavonoids in the inflorescence of Celosia cristata Biomass and yield of Betula platyphylla population in Mila Mount of Tibet