The stem cells used in Bone marrow transplantation, come from the liquid center of the bone, called the marrow. In general, the procedure for obtaining bone marrow, which is called âharvesting,There are mainly three types of Bone marrow transplantation: (a) autologous, (b)syngeneic, and (c) allogeneic, bone marrow is collected from from skin over the pelvic (hip) bone or, in rare cases, the sternum (breastbone), to draw the marrow out of the bone. The harvested bone marrow is then processed to remove blood and bone fragments. Harvested bone marrow can be combined with a preservative and frozen to keep the stem cells alive until hey are needed. This technique is known as cryopreservation. Stem cells can be cryopreserved for many years.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on September, 2014