Cleavage of territrems by alkaline hydrogen peroxide: Isolation and characterization of the aromatic moiety of territrems

1987 ◽  
Vol 3 (2) ◽  
pp. 58-64 ◽  
Author(s):  
Kuo Huang Ling ◽  
Bai Jiun Chen ◽  
Yun Wen Peng ◽  
Shih Chong Tsai ◽  
Fu Chuo Peng ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Alkaline Hydrogen Peroxide ◽  
Aromatic Moiety ◽  
Isolation And Characterization

Physicochemical Characterization of Oxidatively Degraded Calcium Lignosulfonate via Alkaline Hydrogen Peroxide

2014 ◽  
Vol 887-888 ◽  
pp. 575-580 ◽  
Author(s):  
Li Hong Hu ◽  
Jing Zhou ◽  
Cai Ying Bo ◽  
Bing Chuan Liang ◽  
Yong Hong Zhou
Keyword(s):  
Hydrogen Peroxide ◽  
Phenolic Resin ◽  
Physicochemical Characterization ◽  
Oxidative Degradation ◽  
Alkaline Condition ◽  
Alkaline Hydrogen Peroxide ◽  
Phenolic Contents ◽  
H Nmr ◽  
Ft Ir

In order to increase the application prospect of calcium lignosulfonate in phenolic resin, Calcium lignosulfonate was oxidatively degraded by Hydrogen peroxide under alkaline condition. Both lignins were characterized by FT-IR, 1H NMR, UV, GC-MS and GPC. The optimal degradation conditions are: lignosulfonate:water=1:1, wt/wt, pH=10, temperature 60 °C, reaction time 2 h, and H2O2 dosage 6 wt% (based on weight of lignosulfonate). The results show that the degraded resultant is higher in phenolic contents, and lower in methoxyl content. Number molecular weight (Mn) of calcium lignosulfonate sharply decreases to 2294, versus 17774 before oxidative degradation.Guaiacly monoer content increased and kinds of phenolic compounds occurre in oxidative degradation fractions, mainly due to β-O-4 and β-5 cleavage. And reactive activity of the oxidatively degraded compounds is sharply increased.

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

Fractional pretreatment of lignocellulose by alkaline hydrogen peroxide: Characterization of its major components

2015 ◽  
Vol 94 ◽  
pp. 322-330 ◽  
Author(s):  
Yapeng Su ◽  
Ruoyu Du ◽  
Hong Guo ◽  
Ming Cao ◽  
Qinfeng Wu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Alkaline Hydrogen Peroxide

The isolation and characterization of 18 equine microsatellite loci, TKY272–TKY289

2000 ◽  
Vol 31 (2) ◽  
pp. 149-149 ◽  
Author(s):  
T Tozaki ◽  
H Kakoi ◽  
S Mashima ◽  
K Hirota ◽  
T Hasegawa ◽  
...  
Keyword(s):  
Microsatellite Loci ◽  
Isolation And Characterization
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