National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Vliv pozice v kmeni a stanoviště na přirozenou trvanlivost dřeva douglasky tisolisté (Pseudotsuga menziesii)
Dobrovolný, Jakub
This thesis deals with a finding off a relationship between natural durability of Douglas fir wood against wood decaying fungi (Serpula lacrymans and Fibroporia vaillantii) and its habitat growth and position in the trunk. Durability of wood was determined as a percentage of mass loss compared to the original sample. The theoretical part describes all the problems related to this topic. In second part, the measured values are statistically evaluated and compared with literature.
Využití extraktivních látek tropických dřev pro zvýšení přirozené trvanlivosti buku
Přibylová, Zdeňka
This Bachelor thesis focuses on evaluating antimycotic activity of extractive compounds acquired using the FexIKA extraction apparatus. Merbau (Intsia bijuga O.Ktze.) and jatoba (Hymenaea courbaril L.) were used as the sampled material. The extractive compounds were obtained from ground samples of the tropical woods. Then, the beech wood was impregnated with the compounds. A rapid durability test of vulnerability against Trametes versicolor L. was performed. From the data acquired, the weight loss of the impregnated samples and reference samples was evaluated. The results show that the extractive compounds procured from Merbau wood in the highest concentration were able to increase the natural durability of beech from class 5, i.e. not durable, to class 1 - very durable. Impregnation with extractives from Jatoba in the highest concentration level increased the durability from class 5 to class 2, i.e. durable.
Milling process analysis of thermally modified wood
Dvořák, Ondřej ; Sarvašová Kvietková, Monika (advisor) ; Gašparík, Miroslav (referee)
The work is focused on the characteristics of the milling process of thermally modified wood as a new type of material with an innovative internal structure achieved by heat and humidity treatment. The work is divided into three parts. The first part focuses on the theoretical summary of the method of milling and a brief analysis of various types of the process. The second part specializes in description of thermally modified wood as the new technical material. The final part deals with the influence of properties of "thermowood" on milling process.

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