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Survey and evaluation state of timber structures
Zouharová, Kateřina ; Anton, Ondřej (referee) ; Heřmánková, Věra (advisor)
The thesis is focused on the assessment of two wooden roof structures of the building, which is located in Brno on the street Rumiště 8. Parts of the work are also theoretical knowledge of roof structures, building technical survey and diagnostic methods. Rating roof truss was based on a survey of sensory and instrumental methods. In the first step were measured dimensions of roof truss members and were determined roof structures. In the next section was researched damage of elements and his causes. Rehabilitation solution was established for each type of damage to the components resist any attack as long as possible. This report had been prepared for the property owner who plans complete reconstruction.
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Posouzení zdravotního stavu vybraných smrkových porostů na revíru Lipina, Lesní správa Prostějov
Pospíšilová, Lucie
In the second half of the last century, a decline of secondary spruce stands emerged to an increased extent. This fact is connected with incorrect species composition of woody plants, low resistance, gradual temperature increase and rainfall decrease, increased occurrence of insects and fungal pathogens. This theses aims to objectify causes of spruce decline in the Forestry District in Prostějov, the forest Lipina, the forest stands Zadní hory, to evaluate the impact of abiotic and biotic stress factors, to outline passibilities of damage reduction and prolongation of spruce existence in unsuitable localities provided that spruce cover is transformed into mixed cover.
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Posouzení možnosti identifikace hnilob kmene s užitím termokamery
Fiala, Michael
This study is focused to possibilities of using thermography in tree assessment in urban greenery. It was took 628 infrared images of 43 trees. On these trees was determine the extent of damage and decayed wood and cavities. It was also acquired 555 photos in visible spectrum for comparison. For the verification of heat transfer in a tree trunk and bark were made the measurements of temperature development in different depths of trunk with using a thermocouple thermometer. In one case was measured the sap flow. It is not possible recommended infrared cameras as a helpful tool for determining cavities and decayed wood in trees. Interpretation of results obtained from infrared imaginings is difficult and its doesn't show anything more than direct observation in the field. Moreover some of visible defect weren't detected by thermography. Application of infrared cameras can be helpful for evaluation of presence the other organisms dependent on a tree cavity.
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Vliv gleosporiové hniloby na plynné složky odrůd jablek
Šustrová, Markéta
This thesis entitled "Effect of gloeosporium rot as gaseous constituents of apple varieties" deals with microorganisms in terms of storage and processing. Characterized mainly epiphyte microflora occurring on apples, mainly sponge Gloeosporium spp. Specifies how does this affect rot on the gaseous components in the fruit, how it affects breathing and the formation of ethylene and what risks may cause the processing. Features mold and products of their metabolism, concentrations and health risks. The conclusion of this paper describes the experimental determination of the invading microorganisms fruit during storage.
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Škody ohryzem, loupáním a následnými hnilobami v revíru Pluskovec
Ondryáš, Daniel
In the observed hunting district the most claimed damages have been caused by browsing and peeling over last five years. We have investigated 11 buck brushes in the 2nd -- 4th age group where level of damage caused by browsing and peeling with red deer was methodically examined and then compared with forestry files. In one of the most damaged buck brush detailed survey of 5 examples of tree trunks was carried out. In these bush brushes we have found out that average damage the amount of 33.45 %, in the forestry files the figure was 13 %. It is out of the question that our data are different from the data of the Czech Forestry Company; so we can suppose that the damages were overlooked or were collected after counting the damages. Average speed of widening the decay of Stereum sanguinoletum was 54.8 cm per year -1 and in horizontal bearing it was 1.82 cm per year -1. Age of hurt was about 10 years.
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