More Info -- Science.gov
Database Description

Gateway to science information provided by 13 federal scientific agencies. The site provides access to federal science web sites and databases containing technical reports, journal articles, conference proceedings, and other published materials on science topics. Browse web sites by broad subject area; or search websites and databases by keyword.

Peer Reviewed Some of included databases include peer reviewed journal articles.
Connect to Science.gov ...
http://library.humboldt.edu/infoservices/indexes/more/morescigov.html
library.humboldt.edu
crawl=CC-MAIN-2013-20
1436
application/http; msgtype=response
sha1:TU4R54WRNFZC6H7RO4KZAUHGRR75GIJY
<urn:uuid:f7820e35-e9a7-4546-9a8f-7d1e1f8d6d41>
2013-06-19T00:34:14Z
137.150.34.38
sha1:NLBWPBUMBMRY4MEEQQUAIOCMPBLAJSW2
<urn:uuid:0cf11a0b-2fd3-4162-a79d-8a8f29edcd7f>
http://library.humboldt.edu/infoservices/indexes/more/morescigov.html
response
<urn:uuid:9a42b87d-1ce9-4be3-88c9-4bb0c407022c>
robots: classic
hostname: ip-10-60-113-184.ec2.internal
software: Nutch 1.6 (CC)/CC WarcExport 1.0
isPartOf: CC-MAIN-2013-20
operator: CommonCrawl Admin
description: Wide crawl of the web with URLs provided by Blekko for Spring 2013
publisher: CommonCrawl
format: WARC File Format 1.0
conformsTo: http://bibnum.bnf.fr/WARC/WARC_ISO_28500_version1_latestdraft.pdf