نتایج جستجو برای: leather fibers

تعداد نتایج: 72946  

2010
Ron Pinhasi Boris Gasparian Gregory Areshian Diana Zardaryan Alexia Smith Guy Bar-Oz Thomas Higham

In 2008, a well preserved and complete shoe was recovered at the base of a Chalcolithic pit in the cave of Areni-1, Armenia. Here, we discuss the chronology of this find, its archaeological context and its relevance to the study of the evolution of footwear. Two leather samples and one grass sample from the shoe were dated at the Oxford Radiocarbon Accelerator Unit (ORAU). A third leather sampl...

Journal: :Scientific American 1904

Journal: :Sexualization, Media, & Society 2016

ESLAMI FARSANI R., , SEDGHI A., , SHOKOUH FAR A., ,

Carbon fibers are fabricated from different materials such as special polyacrylonitrile (PAN) fibers, cellulose fibers and pitch. But PAN fibers are recognized as the most widely used precursor for the present-day manufacture of carbon fibers. The process of fabrication carbon fibers from special PAN fibers is composed of two steps including oxidative stabilization at low temperature and carbon...

Journal: :Journal of Research of the National Bureau of Standards 1945

Journal: :Journal of the Franklin Institute 1920

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