Regulation of Xanthophyll Cycle of Photosystem by Antenna Proteins and Thylakoid Membrane Lipids ADVANCES IN LUTEIN AND ZEAXANTHIN——The Structures,Properties and Biological Function of Lutein and Zeaxanthin Zeaxanthin Content of Kobresia humilis and Polygonum viviparum in Relation to Solar Radiation at Haibei Research Station HIGH LIGHT-INDUCED CHANGES OF THE DIFFERENTIAL ABSORBANCE AT 505 nm AND CHLOROPHYLL FLUORESCENCE IN LEAVES AND IN GREEN ALGA DUNALIELLA SALINA