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- Axelsson, Anders, et al.
(författare)
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Determination of effective diffusion coefficients in calcium alginate gel plates with varying yeast cell content
- 1988
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Ingår i: Applied Biochemistry and Biotechnology. - 1559-0291. ; 18, s. 231-250
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Tidskriftsartikel (refereegranskat)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.
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4. |
- Bergstrom, H, et al.
(författare)
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Two different types of hollow-cathode discharges used for high resolution laser spectroscopy on copper
- 1989
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Ingår i: Zeitschrift für Physik D Atoms, Molecules and Clusters. - 0178-7683. ; 13:3, s. 203-206
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Tidskriftsartikel (refereegranskat)abstract
- Two different techniques, Doppler-free saturation spectroscopy on a hollow-cathode discharge and fluorescence spectroscopy on a collimated atomic beam produced from a hollow-cathode discharge, have been used for high-resolution laser-spectroscopy measurements on the 3d10 4p and 5p states in neutral Copper. The relative merits of the two techniques are discussed.
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5. |
- Björklund, Anders, et al.
(författare)
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Youth Employment in Sweden
- 1983
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Ingår i: Youth at Work. An International Survey. ; , s. 232-268
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Bokkapitel (övrigt vetenskapligt/konstnärligt)
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7. |
- Carlsson, Goran, et al.
(författare)
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The effect of total body microwave hyperthermia and hepatic artery ligation on liver tumors—an experimental study in rats
- 1983
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Ingår i: Journal of Surgical Oncology. - : Wiley. - 0022-4790 .- 1096-9098. ; 22:1, s. 37-40
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Tidskriftsartikel (refereegranskat)abstract
- The effect of general microwave hyperthermia and hepatic artery ligation (HAL) was tested on Wistar rats with a transplanted N‐methyl‐N‐nitroso‐guanidine‐induced adenocarcinoma in the liver. Total body hyperthermia (41.5°C for 1 hour, three times during 24 hours) was given on the same day as HAL, and 1, 2, and 3 days after. HAL induced a slower tumor growth than untreated controls. No additive effect was registered when total body microwave hyperthermia was added to HAL. When hyperthermia was added 2 days after HAL, there was a transient decrease in tumor volume as in the HAL series. Total body microwave hyperthermia added 3 days after HAL induced a faster tumor growth than after HAL alone. When hyperthermia was added the same day and 1 day after HAL, there was a 50% mortality.
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10. |
- Eriksson, Stig, et al.
(författare)
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Arbetslösheten: ett individuellt problem?
- 1983
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Ingår i: Handelsnytt. - 0017-7326. ; , s. 5-5
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- Om det lyckas att göra en av de idag viktigaste politiska frågorna, arbetslösheten, till ett individproblem, har makthavarna - de ekonomiska och politiska - också lyckats lyfta bort frågan om det kapitalistiska samhällets legitimitet från dagordningen.
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