%0 Journal Article
%T Neodymium cations Nd3+ were transported to the interior of Euglena gracilis 277<br>
%A KANG LinSHEN ZhiqiangJIN Chengzhi
%A <br>
%J 科学通报(英文版)
%D 2000
%I 
%X Euglena gracilis 277, a unicellular green alga, demonstrated remarkable ability to transport Nd3+ to the cell compartments. For a given amount of Nd3+ and cells, the results of ICP-AES indicated that the cellular uptake of Nd3+ was independent of Nd3+ concentration in the bulk solution. The average uptake of Nd3+ per cell (m Nd) is proportional to a parameter ξ — the ratio of neodymium content to the cell counts of the system. A novel approach for probing cellular neodymium by tetraiodotetra chlorofluorescein (I4TCF) has been devised. Data derived from the cryosections of I4TCF-Nd3+ stained cells and EDAX of the fast freezing ultrathin cryosections indicate that Nd3+ is distributed over the cell compartments. Chloroplasts are the major compartments as the residence of Nd3+ in the alga. The transport should be against a concentration gradient of Nd3+ on the order of five, even higher. It is proposed that a calcium ion channel would play an important role in the Nd3+ transportation.
%K neodymium cations Nd3+
%K Euglena gracilis
%K EDAX
%K I4TCF<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=9DD33A82A2152CD89F47D5552C90FD9F&yid=9806D0D4EAA9BED3&vid=94E7F66E6C42FA23&iid=DF92D298D3FF1E6E&sid=E513158F1BE1471F&eid=E543FC2C7CA75C74&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=22