Chemistry
Chemistry is one of the natural sciences known to man and practiced since a long time do not
know that has a beginning, has been associated with this art since ancient civilizations, metals,
mining and industry, colors, medicine, medicine, and...
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Chemistry
Chemistry is one of the natural sciences known to man and practiced since a long time do not
know that has a beginning, has been associated with this art since ancient civilizations, metals,
mining and industry, colors, medicine, medicine, and some industries technical Kdbg leather and
dye cloth and the glass industry, and even cooking of food may be accompanied by chemical
changes such as plant cassava planted Alomerndion in Venezuela for thousands of years BC, and
contains the roots of this plant on the deadly hydrocyanic acid, has been defined by American
Indian veterans of this toxic substance, and they get rid of them by heating this acid which
converts to a non-toxic materials.
And use rights for more than three thousand years BC alum
solution and some of the pigments prepared from H some tannins and fruit trees and leaf sumac in
coloring leather and cloth.
The use of the dye prepared from the leaves of sumac and the fruits of
the plant exists today for the same purpo
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