Empowering Minority Communities with Health Information - ASU (open access)

Empowering Minority Communities with Health Information - ASU

Training Manual updated for United Negro College Fund Special Programs Corporation/National Library of Medicine - HBCU ACCESS Project for Alcorn State University, Natchez, Mississippi, November 12, 2010
Date: November 12, 2010
Creator: McMurray, L. and W. Templin-Branner
System: The UNT Digital Library
NLM Web Resources for Environmental Health and Biomedical Research (open access)

NLM Web Resources for Environmental Health and Biomedical Research

The National Library of Medicine (NLM) is sponsoring this course to increase awareness of the availability and value of NLM’s online environmental health and toxicology information resources that provide invaluable tools to address these issues—for professionals and consumers alike. Participants will receive hands-on practice with selected NLM resources, and demonstrations of other valuable resources will be provided.
Date: September 12, 2010
Creator: Foster, R.
System: The UNT Digital Library
Batteries: Overview of Battery Cathodes (open access)

Batteries: Overview of Battery Cathodes

The very high theoretical capacity of lithium (3829 mAh/g) provided a compelling rationale from the 1970's onward for development of rechargeable batteries employing the elemental metal as an anode. The realization that some transition metal compounds undergo reductive lithium intercalation reactions reversibly allowed use of these materials as cathodes in these devices, most notably, TiS{sub 2}. Another intercalation compound, LiCoO{sub 2}, was described shortly thereafter but, because it was produced in the discharged state, was not considered to be of interest by battery companies at the time. Due to difficulties with the rechargeability of lithium and related safety concerns, however, alternative anodes were sought. The graphite intercalation compound (GIC) LiC{sub 6} was considered an attractive candidate but the high reactivity with commonly used electrolytic solutions containing organic solvents was recognized as a significant impediment to its use. The development of electrolytes that allowed the formation of a solid electrolyte interface (SEI) on surfaces of the carbon particles was a breakthrough that enabled commercialization of Li-ion batteries. In 1990, Sony announced the first commercial batteries based on a dual Li ion intercalation system. These devices are assembled in the discharged state, so that it is convenient to employ a prelithiated cathode …
Date: July 12, 2010
Creator: Doeff, Marca M
System: The UNT Digital Library