Para acceder a los documentos con el texto completo, por favor, siga el siguiente enlace: http://hdl.handle.net/2117/23217

Structural insights on laccase biografting of ferulic acid onto lignocellulosic fibers
Rencoret, Jorge; Aracri, Elisabetta; Gutíerrez, Ana; Del Rio, Jose C.; Torres López, Antonio Luis; Vidal Lluciá, Teresa; Martínez, Ángel T.
Universitat Politècnica de Catalunya. Departament d'Enginyeria Tèxtil i Paperera; Universitat Politècnica de Catalunya. CELBIOTECH - Grup de Recerca: Enginyeria i Biotecnologia de Materials Lignocel·lulòsics
Treatment of high-kappa sisal pulp with Trametes villosa laccase and ferulic acid resulted in strong increases of kappa-number and acid-group content due to biografting of this phenolic acid, as shown by pyrolysis in the presence of tetramethylammonium hydroxide. The coupling linkages were investigated by 2D NMR of the lignin isolated from pulps. The aromatic region of the spectra showed incorporation of the cinnamic molecule, representing similar to 4% of the lignin content, that according to the displacement of its olefinic C-13(beta)-H-1(beta) signal to 117.0/6.40 ppm would be C-4-etherified. The aliphatic region of the spectra showed that ferulic acid also incorporates as the corresponding beta-beta' dilactone (another similar to 4% of the total lignin) with characteristic C-13(beta)-H-1(alpha) and C-13(beta)-H-1(beta) correlations at 81.8/5.69 and 47.9/4.19 ppm, respectively. The sisal lignin in the treated pulps was only slightly modified (including a small increase of C-alpha-oxidized units) revealing that the main effect of the treatment was ferulic acid biografting. (C) 2014 Elsevier B.V. All rights reserved
Àrees temàtiques de la UPC::Enginyeria paperera::Pasta paperera
Pulping
Paper industry--Technological innovations
Laccase
Ferulic acid
Biografting
Dilactone
Pyrolysis
2D NMR
ESTER CROSS-LINKS
SISAL PULP FIBERS
PHENOLIC MEDIATOR
FUNGAL LACCASES
KRAFT PULP
LIGNIN
OXIDATION
GRASSES
REMOVAL
ENZYME
Paper -- Química
Paper -- Fabricació -- Química
info:eu-repo/semantics/publishedVersion
Artículo
         

Mostrar el registro completo del ítem

Documentos relacionados

Otros documentos del mismo autor/a

Rencoret, Jorge; Aracri, Elisabetta; Gutíerrez, Ana; del Rio Andrade, José Carlos; Torres López, Antonio Luis; Vidal Lluciá, Teresa; Martínez, Ángel T.
García Ubasart, Jordi; Vidal Lluciá, Teresa; Torres López, Antonio Luis; Rojas, Orlando J.
Cadena Chamorro, Edith Marleny; Cusola Aumedes, Oriol; Vidal Lluciá, Teresa; Torres López, Antonio Luis
Beltramino Heffes, Facundo; Roncero Vivero, María Blanca; Vidal Lluciá, Teresa; Torres López, Antonio Luis; Valls Vidal, Cristina
García Ubasart, Jordi; Torres López, Antonio Luis; Vila, Carlos; Pastor, Francisco J.; Vidal Lluciá, Teresa