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The micro and nano encapsulation is defined as the packaging of an active through an encapsulating agent (polymer) acquiring properties and characteristics different from their higher scale for their later liberation, under controlled and determined conditions, which promote an increase in the useful life of the product and ease their manipulation when converting a liquid material to solid forms. The microparticles are spherical particles with sizes from 1 to 250 um. The nanoparticles are polymere submicronic systems (<1 um). In this revision some devices, substances and systems used in animal production and veterinary medicine are detailed, as well as their reach and limitations in different fields of study
