Where exposure to weather might loosen the wrap, glue made of fish skin or hide scrapings was used to adhere the bark to
This was due to natural chemicals in the bark (tannins and other chemicals) that were produced by tree bark to
prevent invasion of the living tree by various pests.
For instance, betulin, the compound that whitens paper birch bark, also deters against desiccation and bacteria, fungi, insects and gnawing animals, and the curious, concentric cracks often found on red maple bark result from repeated cycles of fungal infections and attempts by the bark to
wall off, or compartmentalize, the intruders.
New research, soon to be published, suggests that dogs bark to
convey a range of emotions.
New research soon to be published suggests that dogs bark to
convey a range of emotions that humans understand.
New equipment transports the bark to
the presses and on to the silo near the steam holler, which is also used to recover energy from sludge generated by the mill's waste treatment plant.
Provincial Papers in Thunder Bay is installing three boilers this spring and will need to purchase bark to
They later discovered that another protein "cofactor," Barrestin, was necessary for BARK to
Extracting betulin from birch bark to
produce valuable products represents an exciting potential use for an otherwise underutilized renewable forest resource.
There were considerable differences between species in the contribution of bark to
total weight, but not in the percent drop in weight between seasons.
In addition, because of the trend of the bark to
produce finer particles than wood during the refining process, the effective bark content of particle size class 5.
The objectives of this study were 1) to determine the effect of extracted bark particle content and size on the physical and mechanical properties of PB made from black spruce and trembling aspen bark; 2) to compare the physical and mechanical properties of PB made from extracted bark to
those of unextracted bark.
Although in commercial OSB production it is not a common practice to include bark in the furnish, we would like to study the possibility of extending the use of bark to
increase biomass utilization.
A few reports describe the use of SYP bark to
make plywood adhesive mix fillers (Sellers 1994).
Slitting frozen bark to
improve the performance of a ring barker.