Hematopoiesis is the process of formation of blood cellular components derived from derived from hematopoietic stem cells. These hematopoietic stem cells present in bone marrow and have the capability to form different mature blood cells and tissues. This process is necessary in order to maintain steady state levels in the blood circulation.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 October, 2014