earticle

영어

Lignins are the second most abundant three-dimensional amorphous natural nontoxic polymers, occurring in higher plants, mainly in wood. Lignin is mainly separated from wood during pulp and papermaking operations, where it serves primarily as fuel. Lignins vary in structure
according to their plant source. However, because of complex and heterogenous structures of lignin, the industrial utilization of lignin has been limited. In this study, ultra-violet blocking and antioxidant effects of lignins extracted from different milled wood have been explored for
more valuable applications of lignin. The tested samples were poplar (Populus albaglandulosa), yellow poplar (Liriodendron tulipifera), birch (Betula platyphylla), pitch pine (Pinus rigida), Miscanthus giganteus, and Miscanthus sinensis. The ultraviolet (UV) absorption of
the milled wood lignins was observed using a spectrophotometer at a wavelength of 280 nm, 300 nm (UVB), and 340 nm (UVA). Their antioxidant capacity was determined by means of scavenging activity of free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) and total phenol
assay (Folin-Ciocalteu) method.