Study on nutritional ingredients of Spirulina major Study on the Isolation, Purification and Antioxidation Properties of Polysaccharides from Spirulina maxima STUDY ON THE RELATION OF PHOTOSYNTHETICO2-EVOLUTION AND POLYPEPTIDE COMPOSITION OF PSII PARTICLES FROM BLUE-GREEN ALGAE SPIRULINA MAXIMA STUDIES ON PHOTOSYNTHETIC OXYGEN-EVOLUTION AND ULTRASTRUCTURE IN SPIRULINA MAXIMA Effects of Intracellular Polysaccharide from Spirulina maxima on the growth of the Human Leukemia Cells