The results showed that the critical drying temperature of seeds was the function of their drying time and moisture content, and it could be higher when the moisture was .

An experimental investigation was conducted to compare the effects of different processing techniques of several foods which can be dried out by either freezing drying process or critical cryodrying process on the same vacuum drying plant.

The dehydration jujube processed by vacuum critical cryodrying keeps orginal colour, nutritional ingredient and plump body of fresh jujube, high reconstitution rate of water and porous and uniform texture.

A new method of processing candied jujube,except washing process and detaching nucleus process the three step are vacuum critical cryodrying,vacuum infusing sugar and vacuum dehydration in sequence.

Novel technology of supercritical drying for nano-porous materials;

Use of anhydrous ethanol as solvent to prepare nano A1_2O_3 by a supercritical drying method;

Using incipient impregnation,sol-gel method and conventional drying,and sol-gel and supercritical drying techniques,three kinds of 20% Ni/Al2O3 catalysts have been prepared,the catalyst samples were characterized by means of BET,XRD,H2-TPR and H2-TPD.

Alumina aerogels of light nano mesoporous solid material are prepared from Al,n-butanol and ethyl acetoacetate by the sol-gel rute and the N_2 supercritical drying technique.

On the basis of knowledge of these influencing factors,the shrinkage cracking problems can be solved by control of microstructure of silica aerogels and ethanol super critical drying.

Silica aerogels were prepared from TEOS through the sol gel process and super critical drying technique.

Nano-porous material SiO2 aerogels were prepared from TEOS through sol-gel process and super critical drying technique.