Avio C M, Campagni A
G Batteriol Virol Immunol. 1976 Jul-Dec;69(7-12):188-202.
The uptake, accumulation and loss of traces of radiocobalt present in the culture medium by a green alga, Chlorella vulgaris, were studied. The trace quantities of the radionuclide employed had no effect on the growth of the algal population. The uptake is related to the number of cells present and to the temperature of the culture medium; it is not affected by mitotic activity. The rate of the 60Co, uptake during algal growth is compared to the rate of uptake of other radioisotopes; 90Sr and, to some extent, 137Cs have the same rate of uptake as 60Co, whereas 90Y and 144Ce differ. Perhaps the radiocobalt in the cells undergoes a chelating process and consequently its loss to the outer environment is very slow. The involvement of a biological process, in addition to a physical one, is claimed in order to explain the possibility of an active concentration of the radioisotope (C.F.=170). Emphasis is laid on the possible danger of this concentration when a disposal system by dilution of industrial or nuclear waste is employed.
研究了普通小球藻这种绿藻对培养基中微量放射性钴的摄取、积累和损失情况。所使用的微量放射性核素对藻类群体的生长没有影响。摄取与存在的细胞数量以及培养基的温度有关；它不受有丝分裂活性的影响。将藻类生长过程中60Co的摄取速率与其他放射性同位素的摄取速率进行了比较；90Sr以及在一定程度上137Cs与60Co具有相同的摄取速率，而90Y和144Ce则不同。或许细胞中的放射性钴会经历螯合过程，因此其向外环境的损失非常缓慢。为了解释放射性同位素（浓度因子=170）可能的主动浓缩情况，有人提出除了物理过程外还涉及生物过程。当采用通过稀释工业或核废料的处置系统时，强调了这种浓缩可能带来的危险。
