Stem cells are cells found in most, if not all, multi-cellular organisms. They are characterized by the ability to renew themselves through mitotic cell division and differentiating into a diverse range of specialized cell types. Till in the 1960s.The two broad types of mammalian stem cells are: embryonic stem cells that are isolated from the inner cell mass of blastocysts, and adult stem cells that are found in adult tissues. In a developing embryo, stem cells can differentiate into all of the specialized embryonic tissues. In adult organisms, stem cells and progenitor cells act as a repair system for the body, replenishing specialized cells, but also maintain the normal turnover of regenerative organs, such as blood, skin or intestinal tissues.
ASTRONAUTICAL SOCIETY OF INDIA
The Astronautical Society of India (ASI) was set up in 1990 to foster the development of astronautics in the country. ASI is engaged in the dissemination of technical and other information related to astronautics by conducting technical meetings, bringing out technical publications and organising exhibitions. The society is also playing an active role to promote the interests of other developing countries in the field of astronautics through the International Astronautical Federation, Paris, in which the ASI is a voting member.
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