A Study on the Adaptability of Two Kinds of Ball Cactus to Still Hydroponicsand the Optimum Nutrient Solution Formula Rapid Propagation of Cactus‘Milpa Alta’in Vitro Studies on Rapid Culture Techniques and Root Adaptability of Echinocactusgrusonii in Hydroponics Feeding Effect of Different Sucrose Levels on Cochineal (Dactylopius coccus) Study on the effects of two kinds of cactus polysaccharide on erythrocyte membrane protein and fluidity of the lipid in S180 mice Studies on Rapid Culture Techniques and Root Adaptability of Echinocactusgrusonii in Hydroponics Study on the effects of two kinds of cactus polysaccharide on erythrocyte immune function of S180 mice Elementary Research of the Effects of the Cactus Polysaccharide on Removal of Reactive Oxygen Species A Study on the Adaptability of Two Kinds of Ball Cactus to Still Hydroponicsand the Optimum Nutrient Solution Formula Rapid Propagation of Cactus‘Milpa Alta’in Vitro