“Aeromonas caviae CHZ306, a marine-derived bacterium isolated from zooplankton, can use chitin (a polymer of a β-(1,4)-linked N-acetyl-D-glucosamine) as a carbon source. The chitin is hydrolyzed by chitinolytic enzymes, namely endochitinases and exochitinases (chitobiosidase and N-acetyl-glucosaminidase). Indeed, the chitinolytic pathway is initiated by the coexpression of the enzymes endochitinase (EnCh) and chitobiosidase (ChB); however, few studies, including biotechnological production of these enzymes, have been reported, although chitosaccharide are helpful in several industries, such as cosmetics. This study demonstrates the potential to maximize the simultaneous EnCh and ChB production by nitrogen supplementation on culture media. Twelve different nitrogen supplementation sources (inorganic and organic) previously analyzed in elemental composition (carbon and nitrogen) were te...

“Aeromonas caviae CHZ306, a marine-derived bacterium isolated from zooplankton, can use chitin (a polymer of a β-(1,4)-linked N-acetyl-D-glucosamine) as a carbon source. The chitin is hydrolyzed by chitinolytic enzymes, namely endochitinases and exochitinases (chitobiosidase and N-acetyl-glucosaminidase). Indeed, the chitinolytic pathway is initiated by the coexpression of the enzymes endochitinase (EnCh) and chitobiosidase (ChB); however, few studies, including biotechnological production of these enzymes, have been reported, although chitosaccharide are helpful in several industries, such as cosmetics. This study demonstrates the potential to maximize the simultaneous EnCh and ChB production by nitrogen supplementation on culture media. Twelve different nitrogen supplementation sources (inorganic and organic) previously analyzed in elemental composition (carbon and nitrogen) were te...

Un tema de interés actual en la ciencia forestal concierne a la regeneración de los bosques y áreas degradadas. Dentro de esta temática, un aspecto de importancia se refiere a los tiempos que diferentes forestas demoran en recomponerse de modo natural, recuperando sus niveles originales de diversidad y otras características que son claves para retomar su funcionamiento como ecosistemas. El presente trabajo se centra en el marco de los bosques húmedos premontanos de la selva central de Perú, en el valle de Chanchamayo, Junín, entre 1 000 - 1 500 msnm. Un total de 19 Transectos Gentry de 2 × 500 m, que incluyen todas las plantas leñosas ≥ 2.5 cm de Diámetro a la Altura del Pecho fueron establecidos en áreas de bosques maduros, y bosques de diferentes edades posteriores a talado sin quema. Se consideró 5 edades del bosque, 5 - 10, 20, 30, 40 y ≥ 50 años. Se comparó y anal...

Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Bosques y Gestión de Recursos Forestales