A natural product is a chemical compound or substances that are produced by a living organism. Natural products include any substance produced by living forms. By chemical synthesis i.e., semi synthetically and total synthetically natural products are also produced and have played a central role in the development of the field of organic chemistry by providing challenging synthetic targets. The term natural product is also extended for commercial purposes such as cosmetics, dietary supplements, and foods produced from natural sources without added artificial ingredients. Some natural products are pharmacological or biological activity that will help therapeutic in treating diseases. Natural products are the active components not only of most traditional medicines but also many modern medicines. Due to structural diversity of natural products they are easily synthesis by chemical processes and synthetic analogs are also prepared with improved potency and safety, natural products are often used as starting points for drug discovery.
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