The thyrotrope cells in the anterior pituitary gland secrete thyroid-stimulating hormone (TSH) in response to thyrotropine releasing hormone. TSH stimulates the thyroid gland to produce thyroxine (T4) and triiodothyronine (T3) which are necessary to regulate body mechanism. T4 and T3 are very much essential to promote growth during childhood.The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number ofÂ citationsÂ to recent articles published in science and social science journals in a particular year or period, and is frequently used as aÂ proxyÂ for the relative importance of a journal within its field. It is first devised byÂ Eugene Garfield, the founder of theÂ 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