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Determination of effective diffusion coefficients in calcium alginate gel plates with varying yeast cell content

Axelsson, Anders LU and Persson, B (1988) In Applied Biochemistry and Biotechnology 18. p.231-250
Abstract
Effective diffusion coefficients (De) have been determined for lactose, glucose, galactose, and ethanol in calcium alginate gel with varying yeast cell concentration. The measurements have been performed in a diffusion cell, and the results evaluated with the quasisteady-state method. An ultrasonic meter was used for gel thickness determination with an accuracy of 1.5% and a new method for the reproducible preparation of gel plates was developed. It was found thatD e in pure alginate gel decreased to about 90% of the diffusivity in water and did not vary with alginate concentration.D e decreased considerably with increasing yeast cell concentration. For the solutes studied, the effective diffusion coefficient can be estimated according to... (More)
Effective diffusion coefficients (De) have been determined for lactose, glucose, galactose, and ethanol in calcium alginate gel with varying yeast cell concentration. The measurements have been performed in a diffusion cell, and the results evaluated with the quasisteady-state method. An ultrasonic meter was used for gel thickness determination with an accuracy of 1.5% and a new method for the reproducible preparation of gel plates was developed. It was found thatD e in pure alginate gel decreased to about 90% of the diffusivity in water and did not vary with alginate concentration.D e decreased considerably with increasing yeast cell concentration. For the solutes studied, the effective diffusion coefficient can be estimated according to the equationD e =D eo (1 - ϕ)/[1+(ϕ/2)], whereD eo is the effective diffusivity in pure gel and ϕ is the volume fraction of yeast cells. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Applied Biochemistry and Biotechnology
volume
18
pages
231 - 250
publisher
Humana Press
external identifiers
  • wos:A1988P063000016
  • scopus:0001228253
ISSN
1559-0291
DOI
10.1007/BF02930828
language
English
LU publication?
yes
id
13ac7a02-d7b6-47f9-8715-d23bf4541fe3 (old id 3917056)
date added to LUP
2013-07-03 10:21:06
date last changed
2017-01-22 03:22:44
@article{13ac7a02-d7b6-47f9-8715-d23bf4541fe3,
  abstract     = {Effective diffusion coefficients (De) have been determined for lactose, glucose, galactose, and ethanol in calcium alginate gel with varying yeast cell concentration. The measurements have been performed in a diffusion cell, and the results evaluated with the quasisteady-state method. An ultrasonic meter was used for gel thickness determination with an accuracy of 1.5% and a new method for the reproducible preparation of gel plates was developed. It was found thatD e in pure alginate gel decreased to about 90% of the diffusivity in water and did not vary with alginate concentration.D e decreased considerably with increasing yeast cell concentration. For the solutes studied, the effective diffusion coefficient can be estimated according to the equationD e =D eo (1 - ϕ)/[1+(ϕ/2)], whereD eo is the effective diffusivity in pure gel and ϕ is the volume fraction of yeast cells.},
  author       = {Axelsson, Anders and Persson, B},
  issn         = {1559-0291},
  language     = {eng},
  pages        = {231--250},
  publisher    = {Humana Press},
  series       = {Applied Biochemistry and Biotechnology},
  title        = {Determination of effective diffusion coefficients in calcium alginate gel plates with varying yeast cell content},
  url          = {http://dx.doi.org/10.1007/BF02930828},
  volume       = {18},
  year         = {1988},
}