نتایج جستجو برای: hydrophilic extractives of beech
تعداد نتایج: 21165167 فیلتر نتایج به سال:
The purpose of this investigation was to assess the potential of Scots pine (Pinus sylvestris L.) bark and knot extractives to function as preservative chemicals. Scots pine was chosen to due to its importance in Finland; bark and knots were chosen due to their high extractives content and lack of industrial applications. The bark and knots of Scots pine were extracted with acetone and the extr...
This study was carried out to determine the effect of thinning on density, extractives and lignin content of Pinus nigra Amold tree. Wood density was measured with computed tomography and 540+/-20 kg m(-3) were determined on control samples. Density of samples from thinning applied plot was 520+/-20 kg m(-3). The results showed that thinning slightly changes the density of wood and this change ...
Fire occurs relatively frequently in beech (Nothofagus) forest in drought prone eastern areas of the South Island, New Zealand. Because beech is poorly adapted to fire, and is slow to regenerate, forest is normally replaced by scrub or grassland. Seeding was investigated as a means of restoring mountain beech (N. solandri var. cliffortioides) forest after fire destroyed 300 ha of forest at Mt. ...
This study evaluates the edgewise bending moment capacity of the four most frequently used middle joints in the upholstered furniture frames. The research included the following joints: Mortise and Tenon, double Dowel, Corner Blocks and double Gusset Plates, designed in the form of middle joints and made of beech and poplar solid wood. The test results indicated that regarding the edgewise bend...
Small-scale disturbances that create canopy gaps play a key role in regulating successional pathways in temperate forests. This research was carried out with the aim of investigating the structural characteristics of natural canopy gaps in the in the Gap making phase during the development of beech stands in the Asalem forests-Guilan as the initial phase of the development of beech stands. Thre...
American beech gaps in the southern Appalachian mountains are currently threatened by an insect-mediated disease complex known as beech bark disease. Cryptococcus fagisuga Lindinger, or beech scale, a major component of beech bark disease, wounds trees through feeding on vascular tissue through the outer cambium. This feeding method leaves numerous wounds and provides entryways for infection by...
Fallow deer did not prefer either of the two main canopy species (silver beech, Nothofagus menziesii, and radiata pine, Pinus radiata), or any of the common indigenous shrubs, ferns, herbs and monocotyledons in three habitat types (beech, shrub-hardwood, and exotic forest). They did prefer all the common sub canopy tree species, and these comprised the bulk of diet in all habitats. Broadleaf (G...
The population structure of red beech (Nothofagus fusclI) is described for four forest stands situated at different altitudes on 1\.louot Colenso. Data cn red beech seedling densities and frequency distributions of living and dead tree dir:.meters (d.b.h.) arc presented. Red beech seedlings are shown to be more numerous, and on average larger, en decaying red beech logs than elsewhere. This see...
Collectively classified as white-rot fungi, certain basidiomycetes efficiently degrade the major structural polymers of wood cell walls. A small subset of these Agaricomycetes, exemplified by Phlebiopsis gigantea, is capable of colonizing freshly exposed conifer sapwood despite its high content of extractives, which retards the establishment of other fungal species. The mechanism(s) by which P....
Forest containing rata (Metrosideros umbellata) and kamahi (Weinmannia racemosa), with scattered trees of silver beech (Nothofagus menziesii), was sampled on Cedar Hill, Owaka Valley, Catlins Ecological Region. Diameter frequency distributions, age estimates, and basal area measurements show single cohort establishment of rata and kamahi, whereas three establishment phases of silver beech are e...
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