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(lansing, ill.) [ no restrictions ], via wikimedia commons history of textile fibers traditionally, natural fibers have been used in all cultures for making utilitarian products. different parts of the plant are used. fibers can be extracted from the bark (banana, jute, hemp, ramie), stem (banana, palm
, bamboo), leaf (palm, screw pine, sisal, agave), husk (coir), seeds (cotton), and grass (sikki, madhurkati, benakati, munj). animal fibers are obtained from a variety of animal coats, and insect fibers from cocoons. even before the arrival of man-made fibers, manufacturers could create hundreds of different...
https://www.textileschool.com/345/history-of-fibres-natural-and-manmade-fibres/
property of electrical conductivity is mainly because each atom exerts only a loose hold on its outermost electrons , called the valence electrons). thus, a pure metal may be thought of as a lattice of positively charged ions (cations) surrounded by a cloud of delocalized electrons. most metals are chemically
the transition metals —such as iron , copper , zinc , and nickel —take much longer to oxidize. for example, potassium burns in seconds, but iron rusts gradually over a long period of time, depending on the prevailing environmental conditions. other metals—such as palladium , platinum , and gold —do not...
https://www.newworldencyclopedia.org/entry/Metal
property of electrical conductivity is mainly because each atom exerts only a loose hold on its outermost electrons , called the valence electrons). thus, a pure metal may be thought of as a lattice of positively charged ions (cations) surrounded by a cloud of delocalized electrons. most metals are chemically
the transition metals —such as iron , copper , zinc , and nickel —take much longer to oxidize. for example, potassium burns in seconds, but iron rusts gradually over a long period of time, depending on the prevailing environmental conditions. other metals—such as palladium , platinum , and gold —do not...
https://www.newworldencyclopedia.org/entry/Metal