2024-03-29T06:46:33Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/995622022-04-07T11:28:33Zcom_10261_15com_10261_6com_10261_86com_10261_1col_10261_268col_10261_339
Structural insights on laccase biografting of ferulic acid onto lignocellulosic fibers
Rencoret, Jorge
Aracri, Elisabetta
Gutiérrez Suárez, Ana
Río Andrade, José Carlos del
Torres, Antonio L.
Vidal, Teresa
Martínez, Ángel T.
2D NMR
Biografting
Dilactone
Ferulic acid
Laccase
Pyrolysis
8 páginas.-- 4 figuras.-- 1 tabla.-- 37 referencias.-- Un archivo en pdf. de datos suplementarios (3 páginas.-- 1 figura.-- 1 tabla)
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 ∼4% of the lignin content, that according to the displacement of its olefinic 13Cβ–1Hβ signal to 117.0/6.40 ppm would be C4-etherified. The aliphatic region of the spectra showed that ferulic acid also incorporates as the corresponding β–β′ dilactone (another ∼4% of the total lignin) with characteristic 13Cα–1Hα and 13Cβ–1Hβ 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 Cα-oxidized units) revealing that the main effect of the treatment was ferulic acid biografting.
This study was supported by the EU projects LIGNODECO (KBBE-2009-3-244362) and PEROXICATS (KBBE-2010-4-265397) and the Spanish projectsAGL2011-25379, CTQ2010-20238-CO3-01, CTQ2012-34109 and BIO2011.26694. J.R. thanks the CSIC for a JAE-DOC contract, cofinanced by Fondo Social Europeo.
Peer reviewed
2014-07-08T06:48:51Z
2014-07-08T06:48:51Z
2014
artículo
http://purl.org/coar/resource_type/c_6501
Biochemical Engineering Journal 86: 16-23 (2914)
http://hdl.handle.net/10261/99562
10.1016/j.bej.2014.02.013
1369-703X
en
Preprint
http://dx.doi.org/10.1016/j.bej.2014.02.013
Sí
open
Elsevier