Acid hydrolysis of wheat straw: A kinetic study

2012 ◽  
Vol 36 ◽  
pp. 346-355 ◽  
Author(s):  
Esther Guerra-Rodríguez ◽  
Oscar M. Portilla-Rivera ◽  
Lorenzo Jarquín-Enríquez ◽  
Jose A. Ramírez ◽  
Manuel Vázquez
2008 ◽  
Vol 153 (1-3) ◽  
pp. 116-126 ◽  
Author(s):  
Luís C. Duarte ◽  
Talita Silva-Fernandes ◽  
Florbela Carvalheiro ◽  
Francisco M. Gírio

1972 ◽  
Vol 25 (10) ◽  
pp. 2139 ◽  
Author(s):  
M Stewart ◽  
CH Nicholls

The decomposition of tryptophan in aqueous HC1 at 100�C has been shown to proceed by a free-radical autoxidation mechanism. The acid functions by protonating the amino acid at either the 1- or 3-positions prior to autoxidation and so 1-methyltryptophan is also decomposed under these conditions. Impurities present in the soda glass containers used are shown to be responsible for the initiation of the reaction. The decomposition of tryptophan during the acid hydrolysis of proteins is considered in the light of these results.


1990 ◽  
Vol 38 (5) ◽  
pp. 1158-1164 ◽  
Author(s):  
Machiko ONO ◽  
Reiko TODORIKI ◽  
Ichiro ARAYA ◽  
Shinzo TAMURA

1983 ◽  
Vol 20 (6) ◽  
pp. 1585-1588 ◽  
Author(s):  
Beatriz M. Fernández ◽  
Ana M. Reverdito ◽  
Isabel A. Perillo ◽  
Samuel Lamdan

2002 ◽  
Vol 50 (6) ◽  
pp. 1602-1607 ◽  
Author(s):  
Christophe Blecker ◽  
Christian Fougnies ◽  
Jean-Claude Van Herck ◽  
Jean-Pol Chevalier ◽  
Michel Paquot

Author(s):  
Chioma M. Onyelucheya ◽  
Tagbo J. Nwabanne ◽  
Okechukwu E. Onyelucheya ◽  
Onyinye E. Onuoha

2002 ◽  
Vol 55 (4) ◽  
pp. 309-318 ◽  
Author(s):  
R Aguilar ◽  
J.A Ramı́rez ◽  
G Garrote ◽  
M Vázquez

Author(s):  
F.B. de Castro ◽  
P.M. Hotten ◽  
E.R. Ørskov

Extensive hydrolysis of cell wall polysaccharides by rumen bacteria or free enzymes has been reported when lignocellulosic materials had been treated with steam and pressure (Dekker & Wallis, 1983; Castro & Machado, 1989). This has mainly been explained by complete hydrolysis of hemicellulose, lignin depolymerization and redistribution within the cell wall and increasing accessible pore volume by swelling of the cell walls. Physical treatment based on use of steam and pressure alone (auto-hydrolysis) is always associated with the release of toxic levels of furfural and phenolic monomers. These chemicals are able to inhibit the activity of rumen microorganisms, yeasts and free enzymes. To overcome this effect, dilute-acid-hydrolysis at low temperatures and pressures has been proposed (Grohmann et al., 1985). The aim of this study was to evaluate the effect of temperature, sulphuric acid concentration and reaction time on the utilization of treated wheat straw by dilute-acid-hydrolysis, either by rumen bacteria and free enzymes.


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