A nice, concise overview on the differences between primary sources and review articles in the sciences -- offers good tips on how to identify a primary research article.
Research on animal behavior, aquatic life and fisheries, biochemistry, ecology, plant science, toxicology, virology, microbiology, health and safety science, entomology, and more. (NC LIVE)
Scholarly titles supporting student and faculty research, and general nonfiction on topics such as school & studying, career development, arts & leisure, and practical life skills. (NC LIVE)
Applied and general science articles covering topics such as global warming, alternative energy sources, robotic engineering, genetically modified food, and more. (NC LIVE)
"The Biochemistry Research Network on SSRN is an open access preprint server that provides a venue for authors to showcase their research papers in our digital library, speeding up the dissemination and providing the scholarly community access to groundbreaking working papers and early-stage research."