Gene/Protein
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Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
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Drug
Enzyme
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Target Concepts:
Gene/Protein
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Query: UMLS:C0432222 (
SEM
)
47,337
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
A novel and efficient one-pot system for green production of artificial lignin bio-composites has been developed. Monolignols such as sinapyl (SA) and coniferyl (CA) alcohols were linked together with caffeic acid (CafAc) affording a polymeric network similar with natural lignin. The interaction of the dissolved SA/CA with CafAc already bound on a solid support (S
C2
/S
C6
-CafAc) allowed the attachment of the polymeric product direct on the support surface (S
C2
/S
C6
-CafAc-L
1
and S
C2
/S
C6
-CafAc-L
2
, from CA and SA, respectively). Accordingly, this procedure offers the advantage of a simultaneous polymer production and deposition. Chemically, oxi-copolymerization of phenolic derivatives (SA/CA and CAfAc) was performed with H
2
O
2
as oxidation reagent using peroxidase enzyme (2-1B mutant of
versatile peroxidase
from
Pleurotus eryngii
) as catalyst. The system performance reached a maximum of conversion for SA and CA of 71.1 and 49.8%, respectively. The conversion is affected by the system polarity as resulted from the addition of a co-solvent (e.g., MeOH, EtOH, or THF). The chemical structure, morphology, and properties of the bio-composites surface were investigated using different techniques, e.g., FTIR, TPD-NH
3
, TGA, contact angle, and
SEM
. Thus, it was demonstrated that the SA monolignol favored bio-composites with a dense polymeric surface, high acidity, and low hydrophobicity, while CA allowed the production of thinner polymeric layers with high hydrophobicity.
...
PMID:One-Pot Enzymatic Production of Lignin-Composites. 2973 68
