The Invention comprises a process for producing a chitosan Derivative, and a product prepared by same, Activating Chitosan or Chitin as a precursor of Chitosan in alcohol containing Water in an amount ranging from 0% to a maximum of about 30% and prepare deriv Designed by reaction with a Reagent to obtain derivatives that have various uses,Including use as antimicrobicidas microbiost u00e1ticos, antiperspirants, preservatives, Antifungal, or fruit, or as Carriers of active molecules or Functional groups, etc., or a combination thereof.Derivatives Illustrated include SUCCINIC ACID Derivatives, deacetylated Enzyme hydrolysates, level to level, Enzyme, Sugar, formaldehyde, hydrochloric acid and Phosphoric Acid, Copper sulfate, which are obtained by reaction with REACT individually or in combination S consecutive.It also reveals a new class of Proteo - thermostable Chitinase prepared from Aspergillus niger MTCC 5572 has a Molecular Weight on sds-page of approximately 50 KD and hydrolytic activity is optimal At pH 2 and 80 degrees.Compositions also Reveal methods for Natural Products and treatments to retard Aging, improve the service life and retard Microbiological spoilage of bananas and other Fruit.La invención comprende un proceso para producir un derivado de quitosano, y un producto preparado mediante el mismo, al activar quitosano o una quitina como precursor de quitosano en alcohol que contiene agua en una cantidad que abarca del 0% a un máximo de aproximadamente el 30% y preparar derivados mediante reacción con un reactivo para obtener derivados que tienen varios usos, con inclusión de uso como antimicrobicidas, microbiostáticos, antitranspirantes, antifúngicos, o conservantes de frutas, o como portadores de moléculas activas o grupos funcionales etc., o una combinación de los mismos. Los derivados ilustrados incluyen derivados de ácidos, succínicos, desacetilados a nivel enzimático, hidrolizados a nivel enzimático, azúcar, formaldehído, ácido fosfórico, ácido cl
