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.
1988
Forfattere
Torild Wickstrøm W. Lund R. ByeSammendrag
Iron(III) can minimize the serious interference from copper(II) and nickel(II) on the determination of tellurium by hydride generation/atomic absorption spectrometry. The optimal concentrations were found to be 1 g/l and 2 g/l Fe(III) in 4.0 mol/l HCl in presence of nickel(II) and copper(II), repectively. The signals were only 25% lower in a solution og 1.6 g/l Ni(II) than for a nickel-free solution. For copper(II), reasonable sensitivity was retained in the presence of 100 mg/l Cu(II).
Forfattere
Richard HorntvedtSammendrag
Fifty pole stage trees were inoculated with O. polonicum at monthly intervals between May and September. Most infection, measured as the area of sapwood blue-stained, occurred in July and least in May and September. The difference between July, August and September might be explained by the effect of temperature on fungal growth, but in May and June the trees had a higher resistance than expected. Tree resistance was correlated with resinosis. Tree variables not correlated with resistance were DBH, annual ring width, periodic growth, vigor index, or phloem carbohydrate concentration.
Forfattere
Oddvar SkreSammendrag
Frost damages may take place by rapid intracellular freezing or by extracellular ice formation and cell dehydration. The damages are measured visually or by electroconductivity measurements.The first hardeing stage is induced by short days and light, and is related to dormancy induction. The second stage is induced by low temperatures (-2-5 C). During this and the third stage, water binding forms of proteins and sugars are formed, and the membranes are re-structured in order to better withstand dehydration.Potassium prevents frost damages by increasing the resistance against dehydration while nitrogen and phosphorus in high concentrations are extending the growth period and exhaust carbohydrate reserves, making the plants more exposed to frost damages.
Forfattere
Kåre Hobbelstad Ole HofstadSammendrag
No abstract has been registered
Forfattere
Ann Merete Furuberg GjedtjernetSammendrag
No abstract has been registered
Forfattere
Magne Støen Bjørn Langerud Bonsak HammeraasSammendrag
No abstract has been registered
Forfattere
Oddvar SkreSammendrag
No abstract has been registered
Forfattere
Halvor SolheimSammendrag
No abstract has been registered
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Bjørn Langerud Martin SandvikSammendrag
No abstract has been registered
Forfattere
Tonje ØklandSammendrag
No abstract has been registered