After the further analysis on the characteristics of carbonbased reducer used in the production of yellow phosphorus,it is pointed out that the reason for the lower yellow phosphorus production rate is poor chemical activity of anthracite,and so.

According to the tests for the stability of some mineral fiber dusts in inorganic acid and chemical activity of acid_etched residue, the authors discuss the acid etching process of mineral fiber dusts, especially the changes in surface active groups in the acid etching process, and the factors that affect acid_resistance and chemical activity of mineral fiber dusts.

And this paper discussed molecular features of humic acid,chemical activity and modifications of humic acid,absorption properties,peptization and gelation,introduced chief uses of humic acid.

The relation between chemical,physical properties and electrochemical activity for manganese dioxides(Ⅰ);

The electrochemical activity of the aluminum alloy electrodes were studied in 3.

The results indicated that the nanosized α-PbO samples have better electrochemical activity than the conventional α-PbO samples.

Study on the effect of Fe(Ⅲ) on the photochemical activity of nanometer TiO_2;

Opinions were put forward that impaired the aging behavior of the basis material was not the photocatalytic effect but the photochemical activity from lattice defect of TiO_2.

Nona-TiO 2 doped with Mo was prepared in to approaches in an effort to block out its photochemical activity,lower its photosensitivity and improve its weather durabikity.