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.
2001
Forfattere
John Beck Jensen Jørgen A. Mølmann Jorunn Elisabeth Olsen Lars Sandved Dalen Olavi Junttila Øystein Johnsen Anders Lönneborg Carl Gunnar FossdalSammendrag
To find interesting gene products and to study gene expression in the greenparts of Norway spruce we have sequenced 1101 cDNA clones based on mRNA isolated from needles. Here we present some preliminary findings describing the frequency of different Expressed Sequence Tags (ESTs), the ratio of similarity to known and unknown sequences present in GenBank and sequences not previously reported from Norway spruce. In addition we have tried to place the ESTs into major categories based on putative function
Forfattere
Carl Gunnar Fossdal Lars Sandved Dalen Jørgen A. Mølmann John Beck JensenSammendrag
To find interesting gene products and to study gene expression in the green parts of Norway spruce we have sequenced 1101 cDNA clones based on mRNA isolated from needles. Here we present some preliminary findings describing the frequency of different Expressed Sequence Tags (ESTs), the ratio of similarity to known and unknown sequences present in GenBank and sequences not previously reported from Norway spruce. In addition we have tried to place the ESTs into major categories based on putative function
Forfattere
Peder Gjerdrum M. Warensjö M. NylinderSammendrag
Log sorting according to dimension and quality is the first important step during conversion from sawlog to sawn timber. Crooked logs should be rejected or sawn to reduced yield. The 3D scanner furnish detailed information about the log geometry.Based on cylindrical co-ordinates four new parameters describing the centroid were evaluated: Maximum Radial Deviation (MRD), Standard deviation of the Sweep Angle (SSA), Distance from Log End to MRD (DLE), and Residual between the Radial deviation and a skew sinusoidal Model (RRM). 56 unbarked spruce logs were sampled, representing six different crook types denoted I, J, C, V, Z and S according to their curvature.Algorithms were established by means of logistic regression models to distinguish between several crook classes. It was concluded that the 3D scanner can be programmed to effectively perform automatic crook detection and classification.
Forfattere
Oddvar SkreSammendrag
Direct and indirect effects of increased CO2 level on the mountain birch ecosystem are reviewed and evaluated, and supplemented with some case studies on mountain birch (Betula pubescens) based on field experiments at different altitudes and greenhouse experiments at elevated CO2 and winter temperature level. These studies have shown that large differences exist in responses on climate change between mountain birch populations, and that these differences may be related to the climate at their habitat.
Forfattere
Maria Sørensen Arild Ernstsen Leidulf Lund Jarle Nilsen Anders Lönneborg Øystein JohnsenSammendrag
No abstract has been registered
Sammendrag
No abstract has been registered
Forfattere
Jenny Fäldt Halvor Solheim Bo Långström Anna-Karin Borg-KarlsonSammendrag
No abstract has been registered
Forfattere
Alf Bakke Leif Aarvik K. BerggrenSammendrag
No abstract has been registered
Forfattere
Edward Tipping B. Michalzik Jan Mulder J.F. Gallardo Lancho E. Matzner Charlotte Bryant Nicholas Clarke S. Lofts A. Vicente EstebanSammendrag
DyDOC identifies three soil horizons with different properties. Within each horizon the transport of wter, metabolic transformations of organic matter, and sorption of potential DOC are simulated. The model is parameterised by fitting experimental laboratory and field data, including 14C signals. The outputs are quasi-steady state C pools, varying on long timescales (centuries) and daily DOC concentrations and fluxes.
Forfattere
Peder GjerdrumSammendrag
Fuktforandringer i trelasten etter tørking før den når frem til sin endelige bruk er studert. En dynamisk modell for fuktutvikling i stabilt klima er utviklet og analysert. Temperaturområdet er 3 - 60 gr C, og modellen gjelder for planker av 50 mm gran. Arbeidet inngår i bestrebelene for å finne frem til en mer generell modell for et reelt, vekslende klima.