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.
2011
Forfattere
Eva Skarbøvik Hans Christian Udnæs Anne Falk Øgaard Hans Olav Eggestad Thomas Rohrlack Jens Kristian Tingvold Turid Anne DragesethSammendrag
Rapporten gir resultatet av en utredning om Vansjøs manøvreringsreglement. Et utkast til nytt manøvreringsreglement er gitt. I tillegg er det utført hydrologiske analyser av ulike flomtiltak, resultatene viser bl.a. at en flomtunnel vil gi bedre flomdemping enn utsprengninger av Mosseelvas løp. Effekten av flom på innsjønære jordbruksområder er vurdert, men arbeidet må i første rekke ansees som et forsøk på å kaste lys over prosessene i forbindelse med denne problemstillingen, og resultatene fra disse beregningene har derfor stor usikkerhet.
Forfattere
Eva SkarbøvikSammendrag
Det er ikke registrert sammendrag
Forfattere
Audun Helge Nerland Per Brandtzæg Merethe Aasmo Finne Askild Lorentz Holck Olavi Junttila Heidi Sjursen Konestabo Richard Meadow Arne Mikalsen Kaare Magne Nielsen Hilde-Gunn Opsahl Sorteberg Rose Vikse Åshild Kristine AndreassenSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Trygve S. Aamlid Lars Tørres HavstadSammendrag
Det er ikke registrert sammendrag
Forfattere
Dag-Ragnar BlystadSammendrag
Det er ikke registrert sammendrag
Forfattere
Oskar PuschmannSammendrag
Det er ikke registrert sammendrag
Forfattere
grete h m jørgensenSammendrag
Det er ikke registrert sammendrag
Forfattere
Peder GjerdrumSammendrag
This case study describes reflection, analyses and results obtained from investing in a new saw intake plant with the option to separate pre-sorted logs groups in two sub-sets for increased yield and sawing mini-series of 20-30 logs to maintain high capacity. The new plant was in need of careful trimming and follow-up during a period half a year or more before optimal operation was obtained. Log separation is done based on 3D scaling after debarking. As expected, scaling accuracy was substantially improved. However, scars and damages from the debarker cause some variation in the scaling, and most for 3-dimensional parameters like sweep and taper. Nevertheless, total sawn timber recovery increased by two percent of consumed log volume, equivalent to 2.3 % improvement in the sawmill\"s added value. Sawing two orders simultaneously increased the complexity of planning and sawn timber logistics. Automated sawn timber quality prediction based on observations of barked logs in the 3D scanner has so far not proved successful; one reason for this might be the quality variation within each log. It was concluded that the investment has proven profitable.
Sammendrag
Pieces from the stem, approximately 1.5 m above the trunk base, from two Norway maple (Acer platanoides) trees were collected in March 2010 in a forest in Stavanger, a city on the southwestern coast of Norway. The trees showed dieback symptoms in the crown and had bleeding canker wounds on the stems. Phytophthora plurivora had been isolated from the trunks in 2009. At JKI the wood samples were cut into sections, and a detailed procedure was followed for fixation, dehydration, preinfiltration, infiltration, polymerization, and mounting. The mounted histoblocs with the specimen were removed from the histoforms, and a rotary microtome was used for preparing thin sections which were placed on glass slides for microscope examination. Examination in light microscope revealed that the cells in the vascular system had collapsed. Phytophthora-like hyphal growth was found in and between wooden cells, but not in the bark. Since P. plurivora was isolated from the sample, we may conclude that the hyphae belonged to that pathogen. Also epifluorescence studies were carried out, and we found non-septated hyphae in the rays, further indicating the presence of P. plurivora in the wood tissue.