On new species and records of Hydroidomedusae from the Changjiang River Estuary and its adjacent waters;

Single and binary-combined acute toxicity of heavy metal ion Hg~(2+),Cu~(2+),Cd~(2+),Ag~+,Zn~(2+) and Pb~(2+) to Hydra;

Investigation on the teratogenesis from Eucommia Bark, Baikal Skullcap and Ramie root by using Hydra regeneration assay;

Inhibitory effect of Cu~(2+),Cd~(2+) and Pb~(2+) on the feeding behavior of hydra;

Joint Toxicity Test of Heavy Meatal Ions Lead, Cadmium and Zinc to Hydra sp.;

Effects of temperature on population growth and body size of Hydra sp.;

Scanning electron-microscopic observation on morphologic damage of Hydra pseudoligactis under Pb~(2+) and Cd~(2+) pollution;

Localization of AChE and NPY-like substance in Hydra pseudoligactis;

Genetic Diversity of Hydra robusta in Heilongjiang Province by RAPD Analysis;

Hazards of Hydra robusta to Coilia mystus Fry;

In this paper,we introduced the studies on the toxicity of seven kinds of seven kinds of washing powder by using of Hydra robusta and Limnodrilus sp.

The single and combined effects of heavy metal ions Cd~(2+) and Pb~(2+) on the mortality of four species of aquatic organisms (Hydra pseudoligactis, Paramecium caudatum, Dugesia japonica and Cipangopaludia cathayensis) and the ultrastructural morphology of H.