Artículo
About endothermic sorption of tyrosine on chitosan films
Takara, Eduardo Andres
; Vega Hissi, Esteban Gabriel
; Garro Martinez, Juan Ceferino
; Marchese, Jose
; Ochoa, Nelio Ariel
Fecha de publicación:
15/02/2019
Editorial:
Elsevier
Revista:
Carbohydrate Polymers
ISSN:
0144-8617
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Sorption of L- and D-Tyrosine (Tyr) from aqueous solutions on chiral membranes of chitosan (CH) was studied. A high adsorption in the membrane, with a marked enantioselectivity to L-Tyr, was found. Computational calculations carried out by docking and molecular dynamics (MD) showed a difference in the affinity of the enantiomers and two regions of adsorption in the polymer matrix. The interactions of the enantiomers with the polymer matrix were studied by using FTIR, DRx, DSC and TG measurements. These results indicate that adsorption of Tyr reduces the crystallinity of the membrane and generates a rearrangement of the chains, decreasing the intercatenary spacing. Also, it was observed that the hydrated polymorph to anhydrous polymorph ratio has changed during adsorption, that is, water bound to chitosan is also modified. The energy balance of thesystem hydrogen bonding, desolvation and the conformational changes resulted in a spontaneous and endothermic process.
Palabras clave:
CHIRAL ADSORPTION
,
CHITOSAN FILMS
,
ENANTIOSEPARATION
,
INTERACTION CHIRAL
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IMIBIO-SL)
Articulos de INST. MULTIDICIPLINARIO DE INV. BIO. DE SAN LUIS
Articulos de INST. MULTIDICIPLINARIO DE INV. BIO. DE SAN LUIS
Articulos(INFAP)
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos de INST. DE FISICA APLICADA "DR. JORGE ANDRES ZGRABLICH"
Articulos(INQUISAL)
Articulos de INST. DE QUIMICA DE SAN LUIS
Articulos de INST. DE QUIMICA DE SAN LUIS
Citación
Takara, Eduardo Andres; Vega Hissi, Esteban Gabriel; Garro Martinez, Juan Ceferino; Marchese, Jose; Ochoa, Nelio Ariel; About endothermic sorption of tyrosine on chitosan films; Elsevier; Carbohydrate Polymers; 206; 15-2-2019; 57-64
Compartir
Altmétricas