A method efficiently produces hydroxycinnamic acids having a high quality, from a cellulose-containing biomass. More specifically, the method includes the steps of: obtaining an alkaline filtrate by allowing an alkaline aqueous medium to pass through a cellulose-containing biomass; obtaining a hydroxycinnamic acid extraction liquid by allowing the alkaline filtrate to repeatedly pass through the cellulose-containing biomass; and separating the hydroxycinnamic acid from the hydroxycinnamic acid extraction liquid.

A vanillin having a tetramer structure is revealed, comprising a first monomer, a second monomer, a third monomer, and a fourth monomer. Each of the monomers is constituted by C.sub.8H.sub.8O.sub.3. The vanillin includes a first intermolecular hydrogen bond between the first monomer and the fourth monomer, and a second intermolecular hydrogen bond between the second monomer and the third monomer to stabilize the tetramer structure.

A vanillin having a tetramer structure is revealed, comprising a first monomer, a second monomer, a third monomer, and a fourth monomer. Each of the monomers is constituted by C.sub.8H.sub.8O.sub.3. The vanillin includes a first intermolecular hydrogen bond between the first monomer and the fourth monomer, and a second intermolecular hydrogen bond between the second monomer and the third monomer to stabilize the tetramer structure.

The present invention relates to a co-crystal of a compound represented by chemical formula 1 and vanillin, a method for preparing same, and a pharmaceutical composition comprising same. The co-crystal of the compound represented by chemical formula 1 and vanillin of the present invention has excellent chemical and physical stability and is characterized by the XRD pattern, DSC profile, and/or TGA profile.

The present invention relates to a co-crystal of a compound represented by chemical formula 1 and vanillin, a method for preparing same, and a pharmaceutical composition comprising same. The co-crystal of the compound represented by chemical formula 1 and vanillin of the present invention has excellent chemical and physical stability and is characterized by the XRD pattern, DSC profile, and/or TGA profile.

The present invention relates to a new bio-sourced vanillin and/or ethylvanillin, containing specific impurities. The invention further relates to a process for their preparations and the use of such compounds.

The present invention relates to a new bio-sourced vanillin and/or ethylvanillin, containing specific impurities. The invention further relates to a process for their preparations and the use of such compounds.

The invention relates to an Amycolatopsis strain derived from the Amycolatopsis Zyl 926 strain having at least one additional copy of the FCS and ECH genes encoding feruloyl-CoA-synthetase and enoyl-CoA-hydratase/aldolase integrated at the integration site of the C31 phage.

The invention also relates to the method for producing such strains, the integration cassette of the FCS and ECH genes, the use of said strains in a method for producing vanillin, and a method for producing vanillin.

The invention relates to an Amycolatopsis strain derived from the Amycolatopsis Zyl 926 strain having at least one additional copy of the FCS and ECH genes encoding feruloyl-CoA-synthetase and enoyl-CoA-hydratase/aldolase integrated at the integration site of the C31 phage.

The invention also relates to the method for producing such strains, the integration cassette of the FCS and ECH genes, the use of said strains in a method for producing vanillin, and a method for producing vanillin.

Provided are a lignin degradation catalyst that exhibits excellent lignin degradability and that is readily separated after degradation reaction, a method for producing the catalyst, and a method for degrading lignin. The lignin degradation catalyst according to the present invention contains a substrate and at least one metal compound immobilized on the substrate, wherein the at least one metal compound contains a copper compound. The method for producing a lignin degradation catalyst according to the present invention includes the step of brining a porous copper substrate into contact with a solution containing an oxidant to obtain a substrate having a copper compound immobilized thereon, or the step of subjecting a porous copper substrate to electro-oxidation to obtain a substrate having a copper compound immobilized thereon.