Paper Chase is a research database designed to offer abstracts of research articles published in journals that have a highly rated impact factor as determined by ISI Impact Factor and PageRank. Abstracts are organized by date, with the most recently published papers listed first. 

Paper Chase

The Nature of the Depressor Substance of the Blood.

Proc. Natl. Acad. Sci. U.S.A.. 1 1, 1934;20(1):25-7.
Fiske CH.

Biochemical Laboratory, Harvard Medical School.