Miscanthus x giganteus Extractives: A Source of Valuable Phenolic Compounds and Sterols

作者：Villaverde J J; Domingues R M A; Freire C S R; Silvestre A J D^*; Pascoal Neto C; Ligero P; Vega A

来源：Journal of Agricultural and Food Chemistry, 2009, 57(9): 3626-3631.

DOI：10.1021/jf900071t

• Miscanthus x giganteus
• bark
• core
• fatty acids
• sterols
• aromatic compounds
• GC-MS analysis

The chemical composition of the lipophilic extracts of bark and core, of the Miscanthus x giganteus stalk, was studied by gas chromatography-mass spectrometry (GC-MS). Aromatic compounds, sterols, and fatty acids, followed by long-chain fatty alcohols, were the major families of components present in the M. x giganteus stalk. Aromatic compounds are more abundant in the M. x giganteus bark (521 mg/kg of bark), with vanillic acid, vanillin, and p-hydroxybenzaldehyde as the major compounds of this family. In the M. x giganteus core, sterols represent about 949 mg/kg of dry core with beta-sitosterol, 7-oxo-beta-sitosterol, stigmasterol, and campesterol as the major components. The detection of small amounts of esters in the GC-MS analysis with short columns explains the small increase in the abundance of the identified families after alkaline hydrolysis. The high content of valuable sterols and aromatic compounds in M. x giganteus and, particularly, in the core, which is considered a residue in most applications, can open new perspectives for the integrated upgrading of this grass within the biorefinery perspective.

• 出版日期2009-5-13