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Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

Find breaking news, multimedia, reviews & opinion on Washington, business, sports, movies, travel, books, jobs, education, real estate, cars & more.

Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval, similar document identification, citation graph analysis, and query-sensitive document summaries. ...

LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections to recommended job candidates, industry experts and business partners.

Champion Technologies is a leading global specialty chemical company offering innovative and environmentally-acceptable solutions to the oil & gas, refinery, and water treatment industries. Our technical solutions enhance well productivity, impr...

Hindawi is a rapidly growing academic publisher with more than 200 Open Access journals covering a wide range of academic disciplines.

Nature - the world

PLoS ONE: an inclusive, peer-reviewed, open-access resource from the PUBLIC LIBRARY OF SCIENCE. Reports of well-performed scientific studies from all disciplines freely available to the whole world.

WorldWideScience.org is a global science gateway

Gestão Integrada de Fósforo para Controlo da Eutrofização de Bacias Hidrográficas