|Thrombocytes are also called as blood platelets whose function is the coagulation of blood. These are the non-nucleus structures obtained from the megakaryocytes of the bone marrow, and then enter into blood circulation. The main function of thrombocytes is stopping bleeding.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.