This study did microinjection to Kunming white mouse inbred embryos to test its in vitro developmental ability, then pluripotency of porcine EG cells was tested with production of chimera by blastocyst injection.

The mechanism underlying pluripotency and self-renewal is governed at multiple levels,involving the transcriptional regulation,signal transduction and epigenetic regulation and so on.

Interestingly,recent studies demonstrated that SSCs could be induced to pluripotency in culture.

Oct-4 and Nanog are two critical transcriptional factors to keep pluripotency and self-renewal of stem cells in vivo and in vitro, and they usually express only in pluripotent cells and not in differentiated cells.

The progress of studies on multipotential of adult stem cell;

Composite films from polypyrrole and some conventional polymer matrixes such as poly(vinyl alcohol) and poly(vinyl chloride),could not only integrate the exciting multifunctionality of polypyrrole as well as the good film-formability and much lower cost of the matrix polymers,but also produce a novel coadjutant effect of.

Depended on multifunctionality of agriculture,the evaluation index system of agricultural multifunctionality are built in the paper.

The environmental multifunctionality of irrigation and drainage system of paddy rice is well accepted, including groundwater recharge, land subsidence reduction, flood prevention, water and air purification, temperature adjustment, biodiversity maintenance.

BMPR-IB gene which controls the fecundity of Booroola Merino and BMP15 gene which affects the ovulation of Invedale and Hanna were studied as candidate genes on the fecundity of Little Tailed Han Sheep,and their mutations and genetic effects were analyzed.

At present, we have find out the fecundity genes of Booroola Merino, Inverdale and Hanna ,but the study of genetic fecundity is mostly based on routine selected breedin g and molecular markers in Small Tail Han Sheep, some had studied Small Tail Ha n Sheep using the method of candidate genes .