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Polytetrafluoroethylene is a fluorocarbon solid, as it is a high- molecular-weight polymer consisting wholly of carbon and fluorine. PTFE is hydrophobic: neither water nor water-containing substances wet PTFE, as fluorocarbons exhibit only small London dispersion forces due to the low electric polarizability of fluorine.
Fact sheet. A factsheet or fact sheet, also called fact file, is a single-page document containing essential information about a product, substance, service or other topic. Factsheets are frequently used to provide information to an end user, consumer or member of the public in concise, simple language. They generally contain key safety points ...
Wikipedia is written by volunteer editors and hosted by the Wikimedia Foundation, a non-profit organization that also hosts a range of other volunteer projects : Commons. Free media repository. MediaWiki. Wiki software development. Meta-Wiki. Wikimedia project coordination. Wikibooks. Free textbooks and manuals.
Antiparallel and parallel beta sheet. Many proteins may adopt a beta sheet as part of their secondary structure. In beta sheets, sections of a single polypeptide may run side-by-side and antiparallel to each other, to allow for hydrogen bonding between their backbone chains. Beta sheets can also be either a parallel or anti-parallel secondary ...
Factsheet Five was a periodical mostly consisting of short reviews of privately produced printed matter along with contact details of the editors and publishers.. In the 1980s and early 1990s, its comprehensive reviews (thousands in each issue) made it the most important publication in its field, heralding the wider spread of what would eventually be called fanzine or zine culture.
An act to authorize funds for Federal-aid highways, highway safety programs, and transit programs, and for other purposes. Safe, Accountable, Flexible, Efficient Transportation Equity Act: A Legacy for Users or SAFETEA-LU / ˈseɪftiːˈluː / was a funding and authorization bill that governed United States federal surface transportation spending.
e. Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes influenza (flu), predominantly in birds. It is enzootic (maintained in the population) in many bird populations, and also panzootic (affecting animals of many species over a wide area). [1] A/H5N1 virus can also infect mammals (including humans) that ...
Google Sheets is a spreadsheet application included as part of the free, web-based Google Docs Editors suite offered by Google. Google Sheets is available as a web application; a mobile app for: Android, iOS, and as a desktop application on Google's ChromeOS. The app is compatible with Microsoft Excel file formats. [2]