"Shellfishes namely Ocypoda africanus, Penaeus notialis and Procambarus clarkii were collected from Lagos Lagoon and analysed for chlorinated pesticides because they are the most abundant group of aquatic sediment macro-fauna within tropical areas and have the capability to concentrate in their tissues pesticide residues from sediments and water. Sampling was conducted between December 2008 and September 2009 during the dry and wet seasons. The shellfishes were subjected to cold extraction with petroleum ether/acetone (1:1 v/v) mixture and clean-up on silica gel adsorbents. The samples were analysed for aldrin, dieldrin, endrin, DDT, heptachlor, HCH, endosulfan, chlordane and methoxychlor.
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, 2024