Abstract:
:A stimulus-response tracer technique has been used to characterize packed beds of untreated, as well as acid prehydrolyzed, and enzymatically hydrolyzed aspen wood chips. Glucose was used as the tracer. Bulk liquid phase dispersion, interphase mass transfer, and intraparticle diffusion coefficients were determined for these materials as well as effective porosities and tortuosities. The untreated and prehydrolyzed aspen wood chips were found to have effective coid fractions of ca. 0.8, while the enzymatically hydrolyzed wood chips exhibited a void fraction of 0.37. Intraparticle diffusion was approximately twice as rapid in the prehydrolyzed and enzymatically hydrolyzed wood chips as in the untreated wood chips. Also, under the current experimental conditions, intraparticle diffusional transport resistance accounted for roughly half of the total tracer pulse dispersion. It is demonstrated that stimulus-response tracer techniques can be useful and convenient probes for beds of lignocellulosic, or other conversion and/or treatment.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Hradil G,Calo JM,Wunderlich TK Jrdoi
10.1002/bit.260410310subject
Has Abstractpub_date
1993-02-05 00:00:00pages
354-60issue
3eissn
0006-3592issn
1097-0290journal_volume
41pub_type
杂志文章abstract::Protein localization in Saccharomyces cerevisiae was studied with two plasmid systems used as a model: one containing the SUC2 structural gene fused with the MFalpha1 (alpha-factor) promoter and signal-sequence, the other containing the entire SUC2 gene. Special emphasis was placed on the effect of promoter/signal-seq...
journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260340903
更新日期:1989-11-01 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 传,古典文章,历史文章,杂志文章
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更新日期:2000-03-20 00:00:00
abstract::The performance of an industrial pharmaceutical process (production of an active pharmaceutical ingredient by fermentation, API) was modeled by multiblock partial least squares (MBPLS). The most important process stages are inoculum production and API production fermentation. Thirty batches (runs) were produced accord...
journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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更新日期:1983-08-01 00:00:00
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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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更新日期:1995-06-05 00:00:00
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260450607
更新日期:1995-03-20 00:00:00
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journal_title:Biotechnology and bioengineering
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更新日期:1987-11-01 00:00:00
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260390509
更新日期:1992-03-05 00:00:00
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journal_title:Biotechnology and bioengineering
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doi:10.1002/bit.24530
更新日期:2012-10-01 00:00:00
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/bit.260201012
更新日期:1978-10-01 00:00:00
abstract::Flocculation of yeast cells occurs during the fermentation of beer. Partway through the fermentation the cells become flocculent and start to form flocs. If the environmental conditions, such as medium composition and fluid velocities in the tank, are optimal, the flocs will grow in size large enough to settle. After ...
journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
doi:10.1002/(sici)1097-0290(19980205)57:3<330::aid-bit
更新日期:1998-02-05 00:00:00
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pub_type: 杂志文章
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journal_title:Biotechnology and bioengineering
pub_type: 杂志文章
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journal_title:Biotechnology and bioengineering
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更新日期:2009-03-01 00:00:00
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
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更新日期:2009-02-01 00:00:00
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journal_title:Biotechnology and bioengineering
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journal_title:Biotechnology and bioengineering
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更新日期:1988-05-01 00:00:00