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Wood ant thermoregulation heat cluster formation
Slováková, Jana ; Frouz, Jan (advisor) ; Kadochová, Štěpánka (referee)
This study focuses on the influence of ant clusters on nest thermoregulation. The significance of this influence has been measured using temperature information from dataloggers about inner nest as well as ambient air temperature during the period from April 4 to June 4, 2016 and images capturing the ant mound surface for the same period. The results show that the ant clusters incidence rate and the size of the clusters are significantly affected by the inner temperature of the nest. The dependence of the cluster occurrence on the inner temperature is not linear but rather has the character of steep drops at defined temperature thresholds. In the temperature range of 0 - 7řC cluster occurrence significantly increases and reaches the occurrence peak at the upper limit of this interval, from 7řC to 21řC the cluster occurrence rate is significantly lower but relatively constant and at the temperature above 21řC there is a steep decrease. The occurrence of clusters is also significantly determined by climatic influences and insolation, with the measured data showing that after a precipitation or snowfall, the average cluster size is significantly larger compared to similar days without a precipitation or snowfall recorded. Keywords: Formica polyctena, thermoregulation, nest, temperature, ecology
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Possibilities of recycling mobile phones.
Slováková, Jana ; Benešová, Libuše (advisor) ; Polák, Miloš (referee)
Mobile phones are the most used electronic equipment on the globe. Their recycling rate is low because the collection system of end-of-life mobile phones is ineffective. This thesis remains mobile phones collection systems, their composition and content of usable components. The next section describes dealing with mobile phones in the Czech Republic, and the practical part describes the results of research conducted under the ASEKOL, s.r.o. The total weight of the samples was 20 830.27 kg. Total weight in group 3, where mobile phones are, was 13 740.79 kg (5 730 pieces). In comparison with year 2009 the group 3 increased by 155.14 kg, while there was a decline in the number of items in the group - there were from 6,092 pieces to 5,730 pieces.
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Influence of extrusion of oat on the nutritional value and palatability in adult warm-blood horses
Slováková, Jana ; Plachý, Vladimír (advisor) ; Dušan, Dušan (referee)
Oat is still the most used grain in horse nutrition, but the options of processing are extended. Extruded oat shows an alternative to feeding whole or flaked oats. Its advantage is better utilization, so it is possible to feed smaller amount of feed.
Literary part of this writing contains general information about oats, horse nutrition and extrusion. In the oat part we focus on composition and utilization. Chapter horse nutrition is aimed on parts of digestive system, which is related to intake of feed. Chapter extrusion is mostly about the oportunity to use grain, extra attention is laid on trasformation of starch during extrusion. The last part is dedicated to suitability of oat as horse feed and on features of extruded oat and its utilization in horse nutrition.
During experiment was made measurement of time needed to intake 500 g od whole or extruded oat in 5 mature warm-blood horses in JK Počin Dolní Počenice. Each form of feed was measured for 7 days.
Time of intake of this amount od whole oat was 3 minutes and 18 seconds +- 8,9 seconds. Extuded oat was eaten with difficulty, that is why we begun to feed wetted extuded oat. This way of treatment was eaten by 4 of 5 horses. Time of intake was on average 2 minutes 54 seconds +- 6,73. Whole oat was chewed more, in extruded oats horses sometimes even gobbled.
The wetted extruded oat horses was intook faster than whole oat. Hypotesis was rejected, because horses wetted extruded oats ate faster than whole oats. In dry extruded feed is time of intake enlonged according to literature. Extruded oat is feed suitable for working horses, older horses, horses with teeth problems, in time of teeth exchange, coughing horses and horses difficult to feed. Advantage is longer shelf life of feed.
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