%0 Journal Article
%T Growth, structure and upconversion mechanisms of Ba2ErCl7 crystal<br>Human neuronal tau promoting the melting temperature of DNA
%A HAN Jianru
%A ZHOU Guangyong
%A ZHANG Shujun
%A CHENG Zhenxiang
%A CHEN Huanchu
%A <br>.
%J 科学通报(英文版)
%D 2000
%I 
%X The methods to grow a novel upconversion crystal Ba2ErCl7 are reported in this note. Ba2ErCl7 material was synthesized with Er2O3, BaCl2·2H2O and NH4Cl by using a so-called “direct synthesis method”. High quality Ba2ErCl7 single crystals with size up to 4 mm×8 mm×15 mm were grown by using the Czochralski and the Bridgman methods. Intense yellow-green luminescence was detected when the crystal was pumped by an 803 laser diode (LD). Transmittance spectrum was measured by using HITACH U-3500 spectrophotometer at room temperature for the first time, in which one can see that the transmittance is high in the range from 350 to 1 600 nm and the cut-off wavelength of the crystal was 230 nm. The upconversion mechanisms were discussed.
%K Rhizophoraceae
%K cpDNA
%K nrDNA
%K matK
%K rbcL
%K ITS regions
%K relative-rate
%K test
%K divergence time<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=2A6750E953FE9370&yid=9806D0D4EAA9BED3&vid=94E7F66E6C42FA23&iid=708DD6B15D2464E8&sid=90C2E72D2E105FF5&eid=CEA1F7DC6B978724&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=1&reference_num=5