Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2004
Forfattere
Lars Sandved Dalen Heather Danforth John Einset Carl Gunnar Fossdal Aksel Granhus Harald Kvaalen Nina Elisabeth Nagy Paivi Liisa Rinne Linda Ripel Sissel Torre Gunnhild Søgaard Christiaan van der SchootSammendrag
Det er ikke registrert sammendrag
Forfattere
Paivi Liisa Rinne Carl Gunnar Fossdal Sissel Torre Heather Danforth Aksel Granhus Gunnhild Søgaard John Einset Harald Kvaalen Øystein Johnsen Christiaan van der SchootSammendrag
Det er ikke registrert sammendrag
Forfattere
Gunhild Rønning Harald BratliSammendrag
Kartlegging av biologisk mangfold er foretatt i Stjørdal kommune. Til sammen 154 lokaliteter er kartfestet og beskrevet, fordelt på 24 ulike naturtyper. Flest lokaliteter ble registrert i naturtypene dammer, rik edellauvskog, rikmyr og gråor-heggeskog. Lokalitetenes naturverdi er vurdert. Til sammen 37 lokaliteter er gitt verdien svært viktig, 58 er rangert som viktige, mens 59 har lokal verdi. En høg andel dammer ble vurdert som svært viktige. En oversikt over kjente forekomster med truede og sjeldne arter er også gitt.
Forfattere
Alhaji JengSammendrag
Presentation to The African Development Bank Tunis, 2 May 2004
Forfattere
Steinar DraglandSammendrag
Humleplanten var tidligere en viktig vekst i norsk landbruk. Den ble brukt i forbindelse med ølbrygging og tekstilproduksjon, og som prydplante. For om lag 200 år siden minket interessen, og nå finnes humlen nesten bare som prydvekst i Norge. Rester av det tidligere mangfoldet holder på å forsvinne. Derfor har Nordisk Genbank støttet arbeidet med å samle inn og beskrive materialet. Det er nå en klonsamling i Finland, Sverige, Danmark og i Norge.
Forfattere
Martha Ebbesvik Randi Berland FrøsethSammendrag
Det er ikke registrert sammendrag
Forfattere
Gro Skøien Johannessen Randi Berland Frøseth Liv Solemdal Jorunn Jarp Yngvild Wasteson Liv Marit RørvikSammendrag
Aim: To investigate the bacteriological quality, and the occurrence of selected pathogenic bacteria from organically grown Iceberg lettuce fertilized with bovine manure in the form of compost, firm manure and slurry in a 2-year field trial. Methods and Results: Samples of soil, fertilizer, fertilized soil, seedlings and lettuce were analysed for aerobic plate counts (APC), thermotolerant coliform bacteria (TCB), Escherichia coli, E. coli O157:H7, Salmonella spp. and Listeria monocytogenes. No difference in bacteriological quality could be shown in lettuce at harvest, however, APC varied significantly from year to year in the study. The various treatments gave significantly different APC and numbers of TCB isolated from fertilized soil. Escherichia coli O157:H7 was isolated from firm manure and slurry, and soils fertilized with the respective fertilizers the second year, but were not recovered from the lettuce. Conclusions: No difference in bacteriological quality could be detected in lettuce at harvest after application of various types of manure-based fertilizers grown under Norwegian conditions. Significance and Impact of the Study: The results may indicate that the use of manure does not have considerable influence on the bacteriological quality of organic lettuce. However, others have suggested that there is a risk by using manure. There is a need for more research in the field.
Sammendrag
The sun is an abundant energy source, and increasing efforts are made to find more efficient ways to exploit it, than commonly used today. Hydrogen is considered to be the energy carrier of the future, and the potential for a sustainable system where hydrogen is obtained directly from solar energy, has been studied extensively. One alternative is the process of biophotolysis. Sulfur starvation of the green algae Chlamydomonas reinhardtii is known to cause hydrogen production under illumination, by biophotolysis where solar energy is used to produce significant amounts of hydrogen involving parts of the photosynthetic process. So far, little is known about this process in other species, and in this work we have investigated different species of green algae with respect to hydrogen production under sulfur starvation. A number of algae cultures were screened with respect to physiological response to sulfur deprivation in small-scale laboratory cultures under controlled conditions. Test parameters included hydrogen production, reduction of oxygen production, changes in morphology and other aspects of physiology. Investigations of oxygen sensitivity of hydrogenases were also performed. It was shown that other species than C. reinhardtii are able to produce hydrogen under sulfur deprivation.
Sammendrag
Most energy carriers that are in common use today originate from solar energy. Hydrogen is considered to be the energy carrier of the future, and the potential for a sustainable system where hydrogen is obtained directly from solar energy, has been studied by several researchers over the years. Several groups of microorganisms have shown the ability to produce hydrogen by natural biological processes using solar energy. Efforts have been made to understand the mechanisms involved in photobiological hydrogen production from these organisms, and to optimise the process. This work has recently resulted in a significant breakthrough. It has been discovered that some species of green algae have the ability to produce significant amounts of hydrogen during sulphur starvation, which allows hydrogen to be produced in light. However, very little is known about how this process varies between species. We have chosen to investigate green algae, with the intention to examine a variety of species for hydrogen production during sulphur starvation. A number of algae cultures were screened with respect to physiological response to sulphur deprivation in small-scale laboratory cultures under controlled conditions. Results from both marine and fresh water algae will be presented.
Forfattere
Ole Martin Eklo Jens Kværner Eivind Solbakken Ivar Solberg Stein SorknesSammendrag
Det er ikke registrert sammendrag