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Acacia species are widely used for raw materials of papers [1]. However, fatty acid components remaining in paper often cause the paper slide on a printer drum. For this reason, rapid characterization of total fatty acid components in wood is required for the selective tree breeding of Acacia species with less fatty acid content.
In lignin structural analysis, 1H-nuclear magnetic resonance (NMR) spectroscopy is frequently applied using dehydrogenative polymer (DHP) [1]. However, this technique has a disadvantage of long measurement time. On the contrast, Fourier transform (FT) Raman spectroscopy has an advantage of short measurement time and gives the information on various molecule structures similar to NMR. However, peak...
Condensed tannins, mainly comprised of flavan-3-ol (catechin and epicatechin) units, are one of the phenolic compounds in wood with molecular weights between 500–3000 as shown in Figure 1 [1, 2]. The condensed tannins have been traditionally utilized as the agents for converting animal hides to leather (tanning). Recently, the tannins have been also used as an adhesive for wood materials, coagulant...
Tannins are widely distributed in tree species such as conifers, eucalypts and legumes. They are divided into two major groups, condensed tannins and hydrolysable tannins. It is well known that condensed tannins undergo some condensation reactions in alkaline media [1, 2]. Thus, it is supposed that condensed tannins partly recondense with lignin fragments during kraft pulping process and consequently...
Shellac is one of the thermosetting resins of animal origin secreted by the lac insect Kerria lacca which parasitically grows on some types of trees-such as mulberries commonly found in India, Thailand, Myanmar and south area of China. Shellac has been used as thermoplastics, adhesives and sealants, insulating materials and coating materials in various fields such as industrial material, medicine...
In recent years, considerable efforts have been devoted to utilize biomaterials placing petroleum for chemical feedstock. It is of importance to produce biodegradable materials from renewable resources such as lignocellulosics. In this concern, wood is the most important resource because wood can build up large storage of carbon dioxide. However, the wood refining must be done before the use in chemical...
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