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- Adlercreutz, Patrick, et al.
(författare)
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Characterization of Gluconobacter oxydans immobilized in calcium alginate
- 1985
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Ingår i: Applied Microbiology and Biotechnology. - 0175-7598. ; 22:1, s. 1-7
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Tidskriftsartikel (refereegranskat)abstract
- Gluconobacter oxydans cells were immobilized in calcium alginate and the preparation was used for the oxidation of glycerol to dihydroxyacetone. The characterization was done according to the guidelines given by the Working Party on Immobilized Biocatalysts of the European Federation of Biotechnology. The pH optimum of the preparation was found to be 5.0 and the temperature optimum was 40°C. However, the operational stability was better at 30°C. The glycerol concentration required to obtain half the maximal reaction rate was about 5 mM for both immobilized and free cells. At low concentrations of glycerol and high concentrations of dihydroxyacetone a slight inhibition was noted. No loss of activity of the immobilized preparation was observed after storage for 68 days at +4°C. Investigation of the operational stability revealed a half-life of 5 days. Studies of the influence of particle size and cell densities as well as that of oxygen concentration revealed that the oxygen supply was the rate limiting step.
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| 2. |
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| 3. |
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| 4. |
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| 5. |
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| 6. |
- Larsson, L, et al.
(författare)
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The measurement of cell growth in coal slurries
- 1989
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Ingår i: Biotechnology Techniques. - 0951-208X. ; 3:5, s. 295-298
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Tidskriftsartikel (refereegranskat)abstract
- Microbial growth in coal slurries can be detected if surfactant is present in the samples by analysing the protein concentration after disintegration of the cells. Without surfactant present in the samples, the proteins are readily adsorbed on the coal surfaces. A suitable surfactant is sodium dodecyl sulphate at 0.5 to 1% of the sample volume
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| 7. |
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| 8. |
- Olsson, G, et al.
(författare)
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Microorganisms for Desulfurization of Coal: the Influence of Leaching Compounds on their Growth
- 1989
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Ingår i: Fuel. - 1873-7153. ; 68:10, s. 1270-1274
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Tidskriftsartikel (refereegranskat)abstract
- An investigation was undertaken to outline how microorganisms suggested for use in coal desulphurization are affected by compounds leached from coal. Three species of the genus Sulfolobus were studied. Sulfolobus acidocaldarius was seen to be affected by compounds leached from coal more negatively than Sulfolobus brierleyi and Sulfolobus solfataricus. It was observed that certain conditions during leaching, such as pH, temperature and leaching time, were important for the concentration of compounds leached from coal. It was seen that compounds leached from coal, in some cases, can improve the growth yield for the microorganisms.
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| 9. |
- OLSSON, G, et al.
(författare)
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Mikrobiell Avsvavling av Kol
- 1988
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Ingår i: KEMISK TIDSKRIFT. - 0039-6605. ; 100:5, s. 54-56
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Tidskriftsartikel (populärvet., debatt m.m.)
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