Delignification of Maize Stems by Peroxymonosulfuric Acid, Peroxyformic Acid, Peracetic Acid, and Hydrogen Peroxide. 1. Physicochemical and Structural Characterization of the Solubilized Lignins

2000 ◽  
Vol 48 (4) ◽  
pp. 1253-1262 ◽  
Author(s):  
Sun ◽  
J. Tomkinson ◽  
W. Zhu ◽  
S. Q. Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Structural Characterization ◽  
Peracetic Acid ◽  
Peroxyformic Acid

scholarly journals Structural characterization of alkaline hydrogen peroxide pretreated grasses exhibiting diverse lignin phenotypes

2012 ◽  
Vol 5 (1) ◽  
pp. 38 ◽  
Author(s):  
Muyang Li ◽  
Cliff Foster ◽  
Shantanu Kelkar ◽  
Yunqiao Pu ◽  
Daniel Holmes ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Structural Characterization ◽  
Alkaline Hydrogen Peroxide

Mild peroxyformic acid fractionation of Miscanthus×giganteus bark. Behaviour and structural characterization of lignin

2012 ◽  
Vol 35 (1) ◽  
pp. 261-268 ◽  
Author(s):  
Juan José Villaverde ◽  
Jiebing Li ◽  
Pablo Ligero ◽  
Monica Ek ◽  
Alberto de Vega
Keyword(s):  
Structural Characterization ◽  
Miscanthus Giganteus ◽  
Peroxyformic Acid

Syntheses and Structural Characterization of Dinuclear and Tetranuclear Iron(III) Complexes with Dinucleating Ligands and Their Reactions with Hydrogen Peroxide‡

2001 ◽  
Vol 40 (8) ◽  
pp. 1951-1961 ◽  
Author(s):  
Lars Westerheide ◽  
Felizitas K. Müller ◽  
Roberto Than ◽  
Bernt Krebs ◽  
Jens Dietrich ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Structural Characterization ◽  
Dinucleating Ligands

Comparative Studies of Hemicelluloses Solubilized during the Treatments of Maize Stems with Peroxymonosulfuric Acid, Peroxyformic Acid, Peracetic Acid, and Hydrogen Peroxide. Part 1. Yield and Chemical Characterization

Holzforschung ◽  
2000 ◽  
Vol 54 (4) ◽  
pp. 349-356 ◽  
Author(s):  
RunCang Sun ◽  
J. Tomkinson ◽  
Z. C. Geng ◽  
N. J. Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Cell Wall ◽  
Optimum Condition ◽  
Peracetic Acid ◽  
Chemical Characterization ◽  
Alkaline Media ◽  
Minimal Amount ◽  
Minor Components ◽  
Alkaline Peroxide ◽  
Peroxyformic Acid

Summary Treatment of the water-extracted maize stems with peroxymonosulfuric acid at 20 °C for 144 h, peroxyformic acid at 80°C for 6 h, peracetic acid at 50°C for 6 h, and 2% hydrogen peroxide at 45°C for 12 h at pH 1.5, 4.4, 9.5, 11.5, 12.0, and 12.6, respectively, solubilized 47.1%, 91.3%, 33.3%, 16.6%, 15.9%, 17.4%, 86.2%, 87.7%, and 91.3% of the original lignin, and hydrolysed or dissolved 12.1%, 99.1%, 4.5%, 2.7%, 3.1%, 3.1%, 63.3%, 64.7%, and 83.0% of the original hemicelluloses, respectively. Substantial lignins and hemicelluloses were degraded or released during the treatment with peroxyformic acid and alkaline peroxide at pH ≥ 11.5, while an insignificant effect on delignification and hemicellulose solubilization was observed by using peroxymonosulfuric acid, peracetic acid, and hydrogen peroxide in acidic, natural, and weak alkaline media. The optimum condition for extraction of hemicelluloses was found to use 2% H2O2 at 45°C for 12 h at pH 11.5–12.0, which yielded 63.3–64.7% of the original hemicelluloses having much lighter color than those obtained by peroxymonosulfuric acid and peracetic acid under conditions used and 2% H2O2 at pH 1.5, 4.4, 9.5, and 12.6. Xylose and arabinose were the major sugar constituents in these hemicellulose preparations, whereas glucose, galactose, mannose, rhamnose, and fucose were present as minor components. The α-ether linkages between lignin and hemicelluloses in the cell wall of maize stems were substantially cleaved during the treatment with 2% H2O2 at pH ≥11.5 as shown by a minimal amount of associated lignin (2.9–3.9%), rich in syringyl units, in the solubilized hemicelluloses.

Using isotopically-coded hydrogen peroxide as a surface modification reagent for the structural characterization of prion protein aggregates

2014 ◽  
Vol 100 ◽  
pp. 160-166 ◽  
Author(s):  
Jason J. Serpa ◽  
Karl A.T. Makepeace ◽  
Tristan H. Borchers ◽  
David S. Wishart ◽  
Evgeniy V. Petrotchenko ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Surface Modification ◽  
Prion Protein ◽  
Structural Characterization ◽  
Protein Aggregates

Comparative Studies of Hemicelluloses Solubilized during the Treatments of Maize Stems with Peroxymonosulfuric Acid, Peroxyformic Acid, Peracetic Acid, and Hydrogen Peroxide. Part 2. Spectroscopic and Thermal Characterizations

Holzforschung ◽  
2000 ◽  
Vol 54 (5) ◽  
pp. 492-496 ◽  
Author(s):  
Runcang Sun ◽  
J. Tomkinson ◽  
Z. C. Geng ◽  
N. J. Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Peracetic Acid ◽  
Molar Mass ◽  
Gel Permeation Chromatography ◽  
Spectroscopic Techniques ◽  
Average Molar Mass ◽  
Alkaline Peroxide ◽  
Peroxyformic Acid ◽  
Thermal Stability Of ◽  
Obvious Feature

Summary Ten hemicellulosic preparations, obtained by treatments of the water-extracted maize stems with peroxymonosulfuric acid, peroxyformic acid, peracetic acid, and 2% hydrogen peroxide under the conditions given, respectively, were investigated by gel permeation chromatography and spectroscopic techniques such as Fourier transform infrared and carbon-13 nuclear magnetic resonance. Under an optimum extracting condition (2% H2O2, 45°C, 12 h, pH 11.5–12.0), the hemicelluloses obtained represented 63.3–64.7 % of the original hemicelluloses and had high weight-average molar mass between 69060 and 54740 g mol−1. The most obvious feature was found that the alkaline peroxide treatment of the stems under the conditions used did not affect the overall structure of the hemicelluloses. The thermal stability of the hemicelluloses was found to increase slightly with increasing molar mass. All the hemicellulosic preparations were, however, to varying degree thermally unstable at temperature above 180°C.

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