| 1. |
- Odham, G., et al.
(författare)
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Model system for studies of microbial dynamics at exuding surfaces such as the rhizosphere.
- 1986
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Ingår i: Applied and Environmental Microbiology. - 0099-2240. ; 52:1, s. 191-196
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Tidskriftsartikel (refereegranskat)abstract
- An autoclavable all-glass system for studying microbial dynamics at permeable surfaces is described. Standard hydrophobic or hydrophilic membranes (46-mm diameter) of various pore sizes were supported on a glass frit through which nutrient solutions were pumped by a peristaltic pump. The pump provided a precisely controlled flow at speeds of 0.5 to 500 ml of defined or natural cell exudates per h, which passed through the membrane into a receiving vessel. The construction allowed a choice of membranes, which could be modified. The system was tested with a bacterium, isolated from rape plant roots (Brassica napus L.), that was inoculated on a hydrophilic membrane filter and allowed to develop into a biofilm. A defined medium with a composition resembling that of natural rape root exudate was pumped through the membrane at 0.5 ml/h. Scanning electron microscopic examinations indicated that the inoculum formed microcolonies embedded in exopolymers evenly distributed over the membrane surface. The lipid composition and content of poly-beta-hydroxybutyrate in free-living and adhered cells were determined by gas chromatography. The bacterial consumption of amino acids in the exudate was also studied.
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| 2. |
- Gunnarsson, T., et al.
(författare)
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Importance of leaf litter fragmentation for bacterial growth
- 1988
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Ingår i: Oikos. - : JSTOR. - 0030-1299. ; 52:3, s. 303-308
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Tidskriftsartikel (refereegranskat)abstract
- Four fragment size groups of maple leaf litter (Acer platanoides) were leached with sterile water. The fragments and leachates were inoculated with bacteria isolated from maple leaf litter and bacterial activity and growth were determined. About 80-90% of the dissolved organic carbon (DOC) released from the leaf fragments was released during the 1st day; the release was negatively correlated with fragment size. The 2nd day the correlation became positive whereas no correlation was found during days 3-7. Contents of DOC and phenolics in leachates were positively correlated. Release of chemical substances and not the surface area in itself influences bacterial growth and activity on fragmented maple leaf litter. -from Authors
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| 3. |
- Palm, J., et al.
(författare)
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A faster SPACFIL
- 1987
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Ingår i: Computers & Chemistry. - : Elsevier BV. - 0097-8485. ; 11:3, s. 223-225
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Tidskriftsartikel (refereegranskat)
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| 4. |
- v. d. Lieth, C. W., et al.
(författare)
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PEPCRE: an interactive program to create, manipulate and display oligopeptides
- 1987
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Ingår i: Journal of Molecular Graphics and Modelling. - : Elsevier BV. - 1093-3263 .- 0263-7855. ; 5:3, s. 119-125
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Tidskriftsartikel (refereegranskat)abstract
- PEPCRE is an interactive computer graphics program for the rapid construction, manipulation and display of oligopeptides. Essentially any desired conformation of an oligopeptide can be constructed in a simple and straightforward manner. The program provides various display and output possibilities. It is user-friendly and is written in FORTRAN 77 for use on inexpensive, monochrome graphics terminals.
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