Under hydrofluoric acid free and less sulfuric acid conditions, they are separated from each other by combined use of anionic and cationic collectors, increasing SiO 2 content of quartz from 86% to above 97% and reducing Fe 2O 3 content to 0.

"Duo"&"Shao" and the dissymmetry of their structures;

In the Zhouyi of silk manuscript,there are explicit distinctions in the use of the characters xiao(small)and shao(little),in accordance with this,this paper makes a research on the punctuation of the term "heng xiao li" which appears in many hexagram remarks in the old text of the Zhouyi.

Accumulations of Fluoride Contents in the Leaves of 3 Greening Tree Species;

Effects of high fluoride in drinking water on serum hormonal level;

Accumulation of fluoride in leaves of plant around chemical fertilizer plant;