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Rate-constraining changes in surface properties, porosity and hydrolysis kinetics of lignocellulose in the course of enzymatic saccharification

Overview of attention for article published in Biotechnology for Biofuels and Bioproducts, January 2016
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Title
Rate-constraining changes in surface properties, porosity and hydrolysis kinetics of lignocellulose in the course of enzymatic saccharification
Published in
Biotechnology for Biofuels and Bioproducts, January 2016
DOI 10.1186/s13068-016-0431-3
Pubmed ID
Authors

Ville Pihlajaniemi, Mika Henrikki Sipponen, Anne Kallioinen, Antti Nyyssölä, Simo Laakso

Abstract

Explaining the reduction of hydrolysis rate during lignocellulose hydrolysis is a challenge for the understanding and modelling of the process. This article reports the changes of cellulose and lignin surface areas, porosity and the residual cellulase activity during the hydrolysis of autohydrolysed wheat straw and delignified wheat straw. The potential rate-constraining mechanisms are assessed with a simplified kinetic model and compared to the observed effects, residual cellulase activity and product inhibition. The reaction rate depended exclusively on the degree of hydrolysis, while enzyme denaturation or time-dependent changes in substrate hydrolysability were absent. Cellulose surface area decreased linearly with hydrolysis, in correlation with total cellulose content. Lignin surface area was initially decreased by the dissolution of phenolics and then remained unchanged. The dissolved phenolics did not contribute to product inhibition. The porosity of delignified straw was decreased during hydrolysis, but no difference in porosity was detected during the hydrolysis of autohydrolysed straw. Although a hydrolysis-dependent increase of non-productive binding capacity of lignin was not apparent, the dependence of hydrolysis maxima on the enzyme dosage was best explained by partial irreversible product inhibition. Cellulose surface area correlated with the total cellulose content, which is thus an appropriate approximation of the substrate concentration for kinetic modelling. Kinetic models of cellulose hydrolysis should be simplified enough to include reversible and irreversible product inhibition and reduction of hydrolysability, as well as their possible non-linear relations to hydrolysis degree, without overparameterization of particular factors.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 51 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 4%
Thailand 1 2%
Mexico 1 2%
Unknown 47 92%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 12 24%
Researcher 10 20%
Student > Bachelor 6 12%
Student > Doctoral Student 4 8%
Professor 3 6%
Other 8 16%
Unknown 8 16%
Readers by discipline Count As %
Agricultural and Biological Sciences 16 31%
Chemistry 7 14%
Chemical Engineering 6 12%
Engineering 4 8%
Biochemistry, Genetics and Molecular Biology 3 6%
Other 3 6%
Unknown 12 24%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 28 January 2016.
All research outputs
#22,778,604
of 25,394,764 outputs
Outputs from Biotechnology for Biofuels and Bioproducts
#1,417
of 1,579 outputs
Outputs of similar age
#347,453
of 406,056 outputs
Outputs of similar age from Biotechnology for Biofuels and Bioproducts
#50
of 56 outputs
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