Abstract:
:Steam explosion after sulphur dioxide impregnation of wood chips is an effective method for improving the enzymatic digestibility of cellulose in the softwood Pinus radiata. Digestibility of pretreated fiber was progressively increased by altering the conditions of steam explosion. With increasing digestibility, there was an observed increase in fiber porosity as measured by the solute exclusion technique. Accessible pore volume and accessible surface area to a 5-nm dextran probe positively correlated with both 2- and 24-h digestion yields from pretreated fiber. The increase in accessibility was probably the result of hemicellulose extraction and lignin redistribution. A subsequent loss in accessibility, brought about by structural collapse or further lignin redistribution, resulted in a corresponding loss in digestibility. It appears that steam explosion increases cellulose digestibility in P. radiata by increasing fiber porosity.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Wong KK,Deverell KF,Mackie KL,Clark TA,Donaldson LAdoi
10.1002/bit.260310509subject
Has Abstractpub_date
1988-04-05 00:00:00pages
447-56issue
5eissn
0006-3592issn
1097-0290journal_volume
31pub_type
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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