Publications
NIBIOs employees contribute to several hundred scientific articles and research reports every year. You can browse or search in our collection which contains references and links to these publications as well as other research and dissemination activities. The collection is continously updated with new and historical material.
1996
Forfattere
Gro HylenSammendrag
No abstract has been registered
Forfattere
Erik Christiansen A.M. GlosliSammendrag
No abstract has been registered
Forfattere
Bjørn ØklandSammendrag
A high trapping efficiency was found both for window traps and trunk-window traps, while the efficiency of extraction cylinders was low. Trunk-window traps are suitable for comparison of different substrates within the same forest environment, while comparative studies of different forest environments are more difficult, due to baiting effects. Window trap captures are more suitable for comparing different forest environments, but are related to ecological conditions over wide areas, and are almost unaffected by substrate conditions in the near surroundings of the traps
Forfattere
Hannu KokkonenSammendrag
No abstract has been registered
Sammendrag
There is a growing awareness to preserve the biodiversity in the forest ecosystems. A first step in biodiversity research is to find out what species really are found in the forest, using the scientific tool named taxonomy. Still there are species-rich groups of forest insects which have been poorly researched, and which include several unclearities concerning the species identities. One such group is the free-developing gall midges connected with litter, dead wood and fungi in the ground layer of the forest. This papers intends to improve the taxonomy of one genus in this group - Anaretella (Enderlein 1911), including the description of two new species and a key to the current species within the Holarctic region
Forfattere
Lars Sandved Dalen Øystein Johnsen Gunnar OgnerSammendrag
No abstract has been registered
Forfattere
Shabani A.O. Chamshama A.G. Mugasha Bjørn LangerudSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Forfattere
Hans Løkke Jesper Bak Ursula Falkengren-Grerup Roger D. Finlay Hannu IIvesniemi Per Holm Nygaard Michael StarrSammendrag
No abstract has been registered
Forfattere
Torild Wickstrøm W. Lund R. ByeSammendrag
It is shown, by using ICP-AES, that some Ni, Co, Fe and Cr is transported, probably as an aerosol, with the hydrides to the atom cell during a hydride generation process. The amount of matrix elements introduced to the atom cell depends on the concentrations of the sodium tetrahydroborate and the acid used for the hydride generation. For solutions containing 5000 mg l(-1) of Ni and Co, the signals obtained are equivalent to those obtained from 1-5 mg I-1 metal solutions nebulized in the ordinary way. A glass filter Frit placed between the gas-liquid separator and the torch reduces the transport of metal to the plasma by 50-80%. When HGAAS is used, a decrease in sensitivity is observed for As in samples containing high concentrations of Ni and Co. This may be owing to the presence of Ni and Co in the quartz tube atomizer.