According to the outward appearance of the sex gonad and the cytological characteristics of the developing germ cells, the annual cycle of maturation of the clam Mya arenaria can be divided into the following five stages: proliferating stage, growing stage, maturing stage, spawning stage and resting stage.

Studeis were carried out to investigate the karyotyp e of Mya arenaria Linnaeus.

Determination of adenosine in Ligia exotica with ultraviolet spectrophotometry;

Antitumor effects of extract from Ligia exotica(Roux);

Research of chloride diffusion in sea sand concrete;

Experimental study on stimulating chloride ion permeability of sea sand concrete;

Combination procedure and mechanism of sea sand type chlorine ions with cement materials;

Study on the population and biology of cockroaches in Dandong;

Current invasion situation and the methods for controlling cockroaches;

Investigation on species distribution of cockroaches on boats and ships at Zhoushan island;

Efficacy of emulsifiable concentrate against mosquitoes, flies and cockroaches;

Survey on the monitor and invasion situation of cockroaches in Lanzhou city;

Investigation on Species Composition of Cockroaches and Bacteria-carrying on Their Bodies in Five Cities of Hainan;