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Dietary lignins are precursors of mammalian lignans in rats.
It is suggested that lignins, embedded in the cell wall and retained in the bran during solvent extraction, account for 26-32% of the ENL formed from cereal brans, which is commonly found in human plasma and urine. Expand
Identifying the characteristic secondary ions of lignin polymer using ToF-SIMS.
The chemical structure of lignin, a complex, irregular polymer of phenylpropane units that occurs in plant cell walls, was investigated using time-of-flight secondary ion mass spectrometry (ToF-SIMS), and the characteristic guaiacyl ions were confirmed. Expand
Enzymatic saccharification of Eucalyptus bark using hydrothermal pre-treatment with carbon dioxide.
In this study, saccharification of the inner bark of Eucalyptus was carried out by enzymatic hydrolysis to produce bioethanol from non-food biomass. To enhance the accessibility of the enzyme to theExpand
Heterogeneity in formation of lignin—XI: An autoradiographic study of the heterogeneous formation and structure of pine lignin
SummarySelective labeling of p-hydroxyphenyl-, guaiacyl-and syringylpropane moieties in protolignin was achieved by administration of corresponding 3H-labeled monolignol glucosides to differentiatingExpand
A new analysis of the depolymerized fragments of lignin polymer using ToF-SIMS.
ToF-SIMS offers a new tool for the direct analysis of the depolymerized fragments of lignin polymers and shows that the characteristic ions with a guaiacyl ring result from rupture of most common interunit linkages. Expand
A new analysis of the depolymerized fragments of lignin polymer in the plant cell walls using ToF-SIMS
Abstract High mass resolution ToF-SIMS spectra by Au + primary ion bombardment were used to investigate exact structures of characteristic ions of lignin in plant cell walls. Previous study using GaExpand
Heterogeneity in formation of lignin
SummaryThe formation of lignin in the cell wall of compression wood of Pinus thunbergii was examined by selective radio-labeling of specific structural units in the lignin and visualization of theExpand
Formation and chemical structures of acid-soluble lignin I: sulfuric acid treatment time and acid-soluble lignin content of hardwood
To elucidate the formation mechanism of acidsoluble lignin (ASL) formed in the Klason lignin determination, beech wood meals were treated with sulfuric acid (SA) under various conditions, and the ASLExpand
Influence of syringyl to guaiacyl ratio on the structure of natural and synthetic lignins.
The relative frequency of the beta-beta structure increased, whereas that of beta-5 and 5-5 structures decreased with increasing syringyl units, and the analysis of DHPs and natural wood lignins exhibited basically a similar tendency. Expand
Discriminating the indistinguishable sapwood from heartwood in discolored ancient wood by direct molecular mapping of specific extractives using time-of-flight secondary ion mass spectrometry.
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) analysis of specific chemical substances retained for approximately 1300 years after felling demonstrated the presence of sapwood in a discolored ancient architectural wood of Hinoki cypress. Expand