نتایج جستجو برای: cmp dioxane lignin
تعداد نتایج: 15083 فیلتر نتایج به سال:
In muro deacetylation of xylan affects lignin properties and improves saccharification of aspen wood
BACKGROUND Lignocellulose from fast growing hardwood species is a preferred source of polysaccharides for advanced biofuels and "green" chemicals. However, the extensive acetylation of hardwood xylan hinders lignocellulose saccharification by obstructing enzymatic xylan hydrolysis and causing inhibitory acetic acid concentrations during microbial sugar fermentation. To optimize lignocellulose f...
Lignin is one of the most abundant biopolymers, and it has a complex racemic structure. It may be formed by a radical polymerization initiated by redox enzymes, but much remains unknown about the process, such as how molecules as large as enzymes can generate the compact structure of the lignified plant cell wall. We have synthesized lignin oligomers according to a new concept, in which peroxid...
This study aimed to investigate the effects of storage time and dilution black liquor (BL) from Acacia mangium kraft pulping on characteristics isolated Lignin. Lignin isolation was carried out by 1 2 steps using HCL 1M precipitate Lignin, diluted before isolation. Isolated analyzed for its acid-soluble (ASL), insoluble acid lignin (AIL), functional groups FTIR, solubility in dioxane NaOH therm...
Separation of lignocellulosic biomass components for use in sustainable energy and biomaterials applications remains challenging, since biopolymers such as cellulose hemicellulose carbohydrates polyaromatic lignin are found close proximity within the plant secondary cell wall. Organic solvents have been used to pretreat recalcitrant separate interacting polymers, solubilizing fraction lignin-fi...
Polymer blends of hydroXYpl"Opyl cenul~ (HPC) and organ~lv lignin (OSL) were prepared by mixing in solutions of both pyridine and dioxane, and casting 88 fibD8, and by mixing in the melt followed by extrusioo. All preparations exhibited partial miscibility 88 evidmced by a aingle T. up to a compositioo of 40 wt % lignin above which phase aeparatioo was detected. Dioxan~t and injectioo-molded bl...
Small strands and bundles of strands extend from the outside surface of suspension-cultured cells of Daucus, Ipomoea, and Phaseolus into the medium. This fibrous cell coat is present in all samples from various growth stages but appears to increase in quantity in the order Ipomoea < Phaseolus < Daucus. The bundles are often many microns in length and display great variation in frequency, size, ...
This study aims to investigate the ultraviolet (UV) absorption property of palm fiber and to reveal the mechanism underlying its UV-shielding behavior. The UV spectra of various solvent extracts of palm fiber were investigated. Fourier transform infrared spectroscopy (FTIR) and UV spectra were used to analyze the treated palm fiber, 100% α-cellulose, and raw palm fiber. The UV absorbances of pa...
Invasive plant species are a global environmental threat since they affect native and can modify ecosystems, which negatively impacts human health world economics. The aim of this preliminary study was to synthesize characterize new lignin-based biopolymer from gorse (Ulex europaeus), globally widespread invasive plant. lignin extraction carried out through base/acid solvent-based methodologies...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید