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Fyzikální vlastnosti medů
Slováček, Robin
The bachelor thesis is focused on the physical and rheological properties of honeys and influences on these properties. Physical properties of honeys are very different depending on chemical compositon on honey, sources of honey, climatic and geographic conditions. Crystallization of honey depends on the content of glucose and frucose. Nectar honey crystallize more rapidly than honeydew honey, because nectar honey has got a higher amount of glucose. The density of honeydew honeys is higher then nectar honey. The higher density of honey have a honeydew honeys, it is about a minerals. The colour of honeys depends on botanic origin, processing method and lenght of storage. Nectar honeys are lighter than honeydew honeys. Electrical conductivity is very important feature, because this feature we can find out the botanic origin of honey. Honeydew honeys have a higher electric conductivity, because they have got a larger amout of minerals. Rheological properties of honeys depends on composition of sugar and botanic origin.Viscosity is a reological properties of honeys which dicreases with increasing temperature.
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Vliv skladování na obsah vybraných nutrientů v slepičích vejcích
Slováček, Robin
The aim of this master´s thesis was to determinate selected nutrients in hen eggs depending on the time of their storage. The content of nutrients in hen albumen, hen yolk and hen melange was measured in fresh eggs ang in storaged eggs after one, two, eight, fiveteen, twenty nine, forty three and fifty seven days. Teoretical part of thesis is focused on chemical composition of hen egg, breeding, history, storage and consumption. Another part of thesis deals with selected nutrients, specifically by magnesium, copper, calcium, zinc and iron. In practical part the results are presented. The content of these elements was determined with using atomic absorption spectometry. The results show that the storage time did not have an effect on the contents of the selected elements in the eggs. Formula clause:hen egg, magnesium, copper, calcium, iron, zinc, atomic absorption spectrometry
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Fyzikální vlastnosti medů
Slováček, Robin
The bachelor thesis is focused on the physical and rheological properties of honeys and influences on these properties. Physical properties of honeys are very different depending on chemical compositon on honey, sources of honey, climatic and geographic conditions. Crystallization of honey depends on the content of glucose and frucose. Nectar honey crystallize more rapidly than honeydew honey, because nectar honey has got a higher amount of glucose. The density of honeydew honeys is higher then nectar honey. The higher density of honey have a honeydew honeys, it is about a minerals. The colour of honeys depends on botanic origin, processing method and lenght of storage. Nectar honeys are lighter than honeydew honeys. Electrical conductivity is very important feature, because this feature we can find out the botanic origin of honey. Honeydew honeys have a higher electric conductivity, because they have got a larger amout of minerals. Rheological properties of honeys depends on composition of sugar and botanic origin.Viscosity is a reological properties of honeys which dicreases with increasing temperature.
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