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.
2017
Forfattere
Ken Olaf StoraunetSammendrag
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Sammendrag
Takseringen av Nord-Trøndelag i perioden 2012-2016 inngår som et ledd i Landsskogtakseringens landsomfattende takstomdrev. Registreringene i Nord-Trøndelag er basert på 1876 permanente prøveflater som er lagt ut over fylket i henhold til et bestemt system. Produktivt skogareal som kan anvendes til skogbruk er beregnet til 634 000 ha, noe som representerer en økning på ca. 2 % siden taksten i 1995-1999. Økningen skyldes delvis at områder over barskoggrensa, som tidligere var unntatt fra taksering, nå er tatt med. Det stående volumet er beregnet til 65 mill m3 uten bark. Dette er en økning på ca. 44 % sammenliknet med forrige fylkestakst. Rapporten inneholder to ulike alternativer for langsiktige avvirkningsberegninger. Videre opptar det omfattende tabellverket en betydelig del av publikasjonen.
Forfattere
Tor MykingSammendrag
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Sammendrag
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Forfattere
Tor MykingSammendrag
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Sammendrag
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Sammendrag
The world’s need for industrial wood is expected to greatly increase in coming decades. Somatic embryogenesis (SE) is a way in which an almost unlimited number of genetically identical plants (clones) can be produced from a single mother plant/seed, and it offers an effective way to convey the genetic gain obtained in breeding to the planting stock. As cultures or methods of SE, for example in Norway spruce (Picea abies), may become the subject of intellectual property rights (IPRs), a legal conflict may arise between the right holder and the rights of the general public covered by the Every man’s rights to freely sample, for example, forest genetic resources (FGRs). Various IPR systems may be relevant for the protection of SE material in forestry, but they possibly differ in how well sufficient genetic variation can be encompassed by protection claims. We therefore specifically advocate awareness of genetic variation in future SE-related IPR claims in forestry, and argue that process patents are most applicable. In face of the bioeconomy, it is mandatory to be aware of the possible conflicts between IPRs and rights of the public to FGRs, and the genetic variation of future IPR-protected SE material in forestry.
Forfattere
Anna Sandak Jakub Sandak Athanasios Dimitriou Ingunn Burud Thomas Kringlebotn Thiis Lone Ross Graham Alan Ormondroyd Dimitrios KraniotisSammendrag
Bio-based building materials offer a wide range of outlooks, from traditional rustic to modern design products. Recent development in the science of materials significantly improves their functional performance. However, when considering the use of bio-materials in outdoor environments, materials will deteriorate due to processes like weathering, oxidation, biodegradation, wear, and decay. Consequentially, biomaterials may lose visual appeal, leading to a perceived need for replacement even if the material is far from reaching functional failure. Visual assessment is the most direct method for evaluation of the aesthetic appearance of materials. However, it possesses a high degree of subjectivity when performed by an untrained person. On the contrary, measurement of surface properties with dedicated sensors provides objective values that might be related to the current state of the material in use. Recent developments in field of optics and electronics opens a new possibility to perform measurements in-situ. Colour-, gloss-, or spectro-photo-meters allow non-destructive measurements without particular sample preparation. Since all of the above techniques provide complementary information, the multi-sensor approach is more frequently suggested for applied research. The material state can be assessed regularly during service life. In this case, such measurement turns into monitoring. The paper illustrates examples of assessment and monitoring of biomaterials’ degradation due to weathering. Direct implementation of various sensors is demonstrated. A proposal for the approach of combining data provided by various sensing techniques with data mining is also presented.
Sammendrag
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Sammendrag
Mould growth is an important contributor to colour change of untreated wood exposed outdoors. Predicting the development of mould growth is therefore important to ensure successful use of untreated wood as a façade material. More knowledge about the factors affecting mould growth on outdoor exposed wood is required to give better predictions. In this study, climatic factors and material properties affecting mould growth have been investigated by exposing selected wooden specimens (aspen, pine sapwood, pine heartwood, spruce sapwood and spruce heartwood) to 8 different climates for 91 days. The climates were defined in a factorial design with two levels of relative humidity (65 and 85 %), wetting period (2 and 4 hours per day) and temperature (10 and 25 °C), respectively. The degree of mould growth was visually evaluated once a week during the exposure period. Aspen and pine sapwood were the substrates most susceptible to mould growth. There were no significant differences in susceptibility between pine heartwood and spruce heartwood, but the difference between heartwood and sapwood was significant for both pine and spruce. The effect of density on mould growth was tested for the spruce heartwood material, but was not found to reduce the residual variance significantly. However, all the tested climatic factors affected mould growth significantly; relative humidity was most important, while there was a somewhat smaller effect of wetting period and a minor effect of temperature. Overall, increased RH, longer wetting period and increased temperature had a positive effect on the mould growth. It was found a significant interaction between temperature and relative humidity, indicating that the temperature had larger effect on the mould growth at lower relative humidity, and that the relative humidity had larger effect at lower temperature. There was a tendency that the relative performance of the substrates was dependent on climate, but this interaction effect was not significant for any of the climatic factors.