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研究了搅拌式光生物反应器中搅拌速度、通气量对紫球藻生长、胞外多糖和藻细胞超微结构的影响 .实验结果表明 :在特定光照 (10 0 0 μmolm-2 s-1)和培养温度 (2 5℃ )条件下 ,当搅拌转速为 2 0 0r/min、通气量为 0 .71vvm时 ,藻生长速度和胞外多糖含量最高 ;增加通气量有利于藻细胞胞外多糖及生物量的提高 .对藻细胞超微结构的观察发现 ,与摇床培养相比 ,搅拌式光生物反应器使藻细胞淀粉颗粒明显增多 ,粘质鞘层变薄 ,光合片层增多 .动物实验表明 ,紫球藻能明显降低摄食高脂饲料SD大鼠血脂TC、TG、LDL C水平 ,并提高HDL C含量 .实验结果预示 ,紫球藻对预防动脉粥样硬化和冠心病的发生有一定的意义 .图 2表 3参 2 6
The effects of agitation speed and aeration on the growth of P. oculata, extracellular polysaccharides, and ultrastructure of algal cells in a stirred photobioreactor were studied. The experimental results showed that the specific photoperiod (100 μmol m-2 s-1) At the culture temperature (25°C), when the stirring speed was 200 r/min and the ventilation was 0.71vvm, the growth rate of algae and the content of extracellular polysaccharides were the highest; increasing the ventilation rate was beneficial to the exopolysaccharides of algal cells and Increased biomass. Observation of the ultrastructure of the algal cells revealed that the stirred photobioreactor significantly increased the starch granules in the algal cells, the thinning of the slime sheath, and the increase in photosynthetic layers compared to the shaker culture. It was shown that Porphyridium sp. could significantly reduce the levels of TC, TG, and LDL in blood lipids of SD rats fed with high-fat diet, and increase the HDL C content. The experimental results indicate that P. vulgaris has a certain degree of prevention of atherosclerosis and coronary heart disease. The meaning of Fig. 2 Table 3 Reference 2 6