Degrading enzyme in cell wall substances of tobacco;

Study on the extensin in the plant cell wall;

The types and the quantities of monosaccharide consisted in the six different plant cell walls were determined by the ion chromatograph in this experiment.

The researches on the relationship of the expansion of plant cell wall and some wall bind enzymes such as peroxidase and xyloglacan endotransglycosylase are described.

The effect of sodium sulfite treatment on cell wall material and cell wall enzyme activity of postharvest bamboo shoots were investigated.

Selective retention plays a critical role in the realization of animal cells perfusion culture with highviability and concentration.

The space environment refers to an environment far away from the earth s surface and different in many respects from the surface of the earth,where animal cells will be influenced by all kinds of space factors,including mainly space radiation,extreme temperature,high vacuum,micro-magnetic field and the special environment in spacecrafts,namely,that of microgravity.

We reviewed the efforts made in this direction,and how the metabolic engineering of animal cells has been approached to reshape their profiles in various key aspects,namely:central metabolism,protection of apoptosis,regulation of cell cycle,and finally,the combined engineering of different aspects.

Research advance in large-scale culture of animal cells;

Many biological products were manufactured by means of large-up culture of animal cells.

The growth of animal cells in vitro needs many kinds of growth factors.