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.
2015
Forfattere
Bruce Talbot Karl Stampfer Rien VisserSammendrag
An assessment of the benefits of a fully integrated yarder-processor was made against the alternative of splitting the yarding and processing functions onto two base machines. The effect of productivity rates, specific costs, and crew sizes on the relative performance of each working configuration was investigated. The systems analysis showed that for the integrated yarder machine, a two-man crew was considerably cheaper than a three-man crew at all yarding distances, although the difference became less pronounced with increasing mean tree volumes. The single integrated machine with a 2-man crew was cheaper than the modelled 2-machine system at medium and longer extraction distances, as the processor base machine in the 2-machine systems incurred a considerable cost penalty in waiting idly for the yarder. At shorter distances (75 m) the 2-machine system was cheapest, but became less competitive with increasing mean tree volume. For mid-sized trees (0.38 m3) on a medium corridor length of 150 m, overall system productivity rates ranged from 5.2 m3 per productive system hour (PSH) for the single machine system to 9.4 PSH−1 for the 2-machine system, although the specific net costs were almost identical at 31.5 € m−3. A sensitivity analysis showed that reduced labour costs would promote use of the 2-machine system, suggesting that the optimum system configuration would be country specific. Despite being marginally more costly in small trees at short corridor lengths (75 m), the single fully-integrated machine was considered the working configuration of choice under Norwegian conditions.
Forfattere
John Marshall BrydenSammendrag
Det er ikke registrert sammendrag
Forfattere
Margarita Novoa GarridoSammendrag
Det er ikke registrert sammendrag
Forfattere
Margarita Novoa-GarridoSammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Sammendrag
Det er ikke registrert sammendrag
Forfattere
Sergey Hayrapetyan Emilio Alvarenga Lusine Hayrapetyan S.A. Gevorgyan G.P. Pirumyan Brit SalbuSammendrag
The scanning electron microscopy (SEM), x-ray fluorescence spectrometry (XRF) and inductively coupled plasma mass spectrometry (ICP-MS) methods were used for investigation of manganese dioxide (MnO2)–containing composite sorbents and their sorption properties were evaluated as well. A characterization of the sorbents was performed by SEM and XRF. Diatomite and silicagel were used as the porous carrier for the MnO2 (which provides the functionality of the sorbents). The silica component was prepared by co-precipitation of water glass with manganese dioxide. Potassium permanganate is used as a source of manganese dioxide. Deposition of MnO2 was carried on the pore surfaces of porous materials (silica, diatomite) by means of hydrogen peroxide and formaldehyde. The sorbent prepared under the previously described procedure was tested for compounds containing potassium (K+).
Forfattere
Torstein KvammeSammendrag
Det er ikke registrert sammendrag
Forfattere
Julie Stamenic Andrew B. Gill Celine ReboursSammendrag
Det er ikke registrert sammendrag
Sammendrag
The woodland strawberry (Fragaria vesca) has become the model plant for the economically important, but genetically complex, octoploid F. × ananassa. Crown rot caused by the oomycete Phytophthora cactorum is a major problem for the strawberry industry and the identification and incorporation of efficient resistance genes into superior cultivars are important for breeding. In the present study, two experimental populations were used in inoculation experiments under controlled greenhouse condition. Studies of a sparse diallel cross between resistant and susceptible F. vesca genotypes concluded that resistance to crown rot is inherited as a dominant trait under nuclear control. Subsequently, an F2 population derived from the grandparents Bukammen (resistant) and Haugastøl 3 (susceptible) collected in Norway, were phenotyped in infection experiments and genotyped using genotyping-by-sequencing. A 416.2-cM linkage map was constructed, and a single major gene locus was identified on linkage group 6 that we attributed to resistance to Phytopthora infection. We propose to name the resistance locus RPc-1 (Resistance to Phytophthora cactorum 1). Gene prediction of the 3.3 Mb QTL recovered 801 genes of which 69 had a potential role in plant disease resistance.