Platelet-activating factor (PAF) is a potent phospholipid activator of g-protein coupled receptor. It also acts as as a mediator of biological functions such as platelet aggregation and degranulation, inflammation, and anaphylaxis at very low concentrations. It is also responsible for changes in vascular permeability and chemotaxis and oxidative burst of leukocytes.The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number ofÃÂ citationsÃÂ to recent articles published inÃÂ science and social science journals in a particular year or period, and is frequently used as aÃÂ proxyÃÂ for the relative importance of a journal within its field. It is first devised byÃÂ Eugene Garfield, the founder of theÃÂ 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, 2024