The reaction of phytophagous on differenced manganese content in the diet
Martinek, Petr
2018 - English The rapid adaptation of insect species on environment changes can represent a significant advantage for their development and consequently a great negative effect for the stability of forest ecosystems. Larval individuals of Cabera pusaria and Lymantria dispar and adults of Melolontha hippocastani and Phillobius arborator is in general widely expanded species of herbivorous insects in European regions and with them are connected huge economic and ecological losses. The composition of food (biogenic elements, trace elements, heavy metals, proteins, carbohydrates etc.) is the main parameter of food quality. Laboratory experiment with natural diet (assimilation apparatus of Quercus petraea and Betula pendula) in control conditions (temperature, humidity, and light) were used for determination of insects’ reactions to increased concentration of manganese in the diet. Food was contaminated by soaking in solutions of MnCl2.4H2O with graded manganese concentrations. On the base of experiment design and character of reared experimental species we determined the food consumption, the activity period of adults, the mortality of larvae, the quantity of eggs laying, the dry mass and live weight of experimental individuals, concentrations of manganese in unconsumed food, excrement and lyophilized bodies, larval and pupal exuviae. Mentioned parameters were observed for determination of reactions of experimental insect species on changed food quality via the presence of high manganese contents. The results showed, that the reactions of individual experimental animals were very different. We observed the negative reaction to high manganese content in the diet of L. dispar larvae with the tendency of its compensation (the increasing food consumption rate and prolongation of development). Caterpillars of C. pusaria were very sensitive to changed food quality and therefore we observed high mortality. On the other side, the high manganese content in the diet of P. arborator in the laboratory conditions influenced neither their food intake nor their mortality. For individuals of M. hippocastani very high content of manganese in the diet significantly influenced the food consumption and thereby their development(distortion of copulation and consequent eggs laying). We observed the repellent effect of high levels of manganese in the diet. In all cases, the elimination mechanisms of surplus manganese in the diet were observed. Individuals in experiments exuded manganese through the digestive system into excrements and by incorporation of it into unspecified parts of their adult body without direct physiology activity or in exuviae of caterpillars. The rapid adaptation of insect species on environment changes can represent a significant advantage for their development and consequently a great negative effect for the stability of forest ecosystems. Larval individuals of Cabera pusaria and Lymantria dispar and adults of Melolontha hippocastani and Phillobius arborator is in general widely expanded species of herbivorous insects in European regions and with them are connected huge economic and ecological losses. The composition of food (biogenic elements, trace elements, heavy metals, proteins, carbohydrates etc.) is the main parameter of food quality. Laboratory experiment with natural diet (assimilation apparatus of Quercus petraea and Betula pendula) in control conditions (temperature, humidity, and light) were used for determination of insects’ reactions to increased concentration of manganese in the diet. Food was contaminated by soaking in solutions of MnCl2.4H2O with graded manganese concentrations. On the base of experiment design and character of reared experimental species we determined the food consumption, the activity period of adults, the mortality of larvae, the quantity of eggs laying, the dry mass and live weight of experimental individuals, concentrations of manganese in unconsumed food, excrement and lyophilized bodies, larval and pupal exuviae. Mentioned parameters were observed for determination of reactions of experimental insect species on changed food quality via the presence of high manganese contents. The results showed, that the reactions of individual experimental animals were very different. We observed the negative reaction to high manganese content in the diet of L. dispar larvae with the tendency of its compensation (the increasing food consumption rate and prolongation of development). Caterpillars of C. pusaria were very sensitive to changed food quality and therefore we observed high mortality. On the other side, the high manganese content in the diet of P. arborator in the laboratory conditions influenced neither their food intake nor their mortality. For individuals of M. hippocastani very high content of manganese in the diet significantly influenced the food consumption and thereby their development(distortion of copulation and consequent eggs laying). We observed the repellent effect of high levels of manganese in the diet. In all cases, the elimination mechanisms of surplus manganese in the diet were observed. Individuals in experiments exuded manganese through the digestive system into excrements and by incorporation of it into unspecified parts of their adult body without direct physiology activity or in exuviae of caterpillars. Keywords: bekyně velkohlavá; bříza; dub; chroust maďalový; listohlod stromový; Mn; mortalita; přírodní potrava; světlokřídlec obecný; vývoj Available to registered users in the Library of Mendel University. The reaction of phytophagous on differenced manganese content in the diet

The rapid adaptation of insect species on environment changes can represent a significant advantage for their development and consequently a great negative effect for the stability of forest ...

Martinek, Petr
Mendelova univerzita v Brně, 2018

Virtual organization as a special cooperation form in the activity field of Mergers & Acquisitions
Hanser, Nicholas
2014 - English Předložená disertace se zaměřuje na poskytnutí návodu k výzkumu a praxi v oblasti spolupráce formou virtuální organizace, a poskytuje podklady k prokázání, že virtuální organizační formy mohou být životaschopnou alternativou ke klasickým a tradičním formám spolupráce jako jsou fúze, akvizice, strategické aliance, joint ventures a další v praxi uplatňované formy. Přestože klasické a tradiční formy spolupráce jsou široce známé a často diskutované v příslušných publikacích, neplatí totéž o spolupráci formou virtuálních organizací. Disertace vysvětluje vznik a teoretické základy virtuálních organizací. Poté jsou uvedeny typické charakteristiky, a také příležitosti a rizika této organizační formy. Empirické studie manažerů a firem kotovaných na burzách v Evropě prokazují, že koncept virtuálních organizací není mezi odbornou veřejností a v podnikatelské praxi tak rozšířen, jako jiné klasické a tradiční formy spolupráce. Na druhé straně práce též dokládá, že mnohé charakteristiky a aspekty virtuální organizace popsané v příslušné manažerské literatuře lze nalézt také v podnikatelské praxi a v reálných firmách. Následně jsou diskutovány případové studie z moderní podnikatelské praxe s cílem dále zdůraznit koncept virtuální organizace a jeho přirozené vlastnosti pomocí reálných příkladů z podnikatelského světa. Tato disertační práce si klade za cíl objasnit tento rozdíl spočívající v nedostatečném veřejném povědomí na straně jedné a v zastoupení příslušných charakteristik virtuálních organizací ve firmách na straně druhé. Srovnání s jinými formami spolupráce ukazuje, že virtuální korporace lze jasně odlišit od jiných forem spolupráce, a to navzdory skutečnosti, že lze pozorovat významné podobnosti a společné základy. V závěru je diskutován význam a potenciál virtuálních organizací v současnosti a v budoucnosti. This dissertation aims to provide guidance to research and practice in regards to the co-operation form of the virtual organisation and the insight that virtual organisation forms could prove to be a viable alternative to classic and traditional cooperation forms such as mergers, acquisitions, strategic alliances, joint ventures and others in business practice. Although the classic and more traditional cooperation forms are widely known and often discussed in the relevant press, the same does not seem to be true for the cooperation form of the virtual organisation. The explanation of the emergence and the theoretical foundation of the virtual organisation are mentioned in this dissertation. After that, typical characteristics and chances and risks of the organisation form follow. Empirical studies with business professionals and stock exchange listed companies in Europe prove that the concept of the virtual organisation is not so widely known in the public and in the business praxis as other classic and traditional cooperation forms. It is shown that on the other hand, many characteristics and aspects of the virtual organisation, as they are described in the relevant business and management theory, can also be found in business praxis and in real life companies. Case studies from modern business praxis will be discussed in order to further highlight the concept of the virtual organisation and its inherent characteristics via real examples from the business world. This dissertation aims to make clear this discrepancy of a lack of public conscious awareness on the one hand and representation of relevant characteristics of virtual companies on the other hand. The comparison with other forms of cooperation shows that virtual corporations can be clearly distinguished from other forms of cooperation, despite the fact that significant similarities and common grounds can be partially observed. The relevance and the potential of the cooperation type of the virtual organisation can have in the present and in the future is also discussed. Keywords: formy spolupráce; technologie; virtualizace; virtuální firma Available to registered users in the Library of Mendel University. Virtual organization as a special cooperation form in the activity field of Mergers & Acquisitions

Předložená disertace se zaměřuje na poskytnutí návodu k výzkumu a praxi v oblasti spolupráce formou virtuální organizace, a poskytuje podklady k prokázání, že virtuální organizační formy mohou být ...

Hanser, Nicholas
Mendelova univerzita v Brně, 2014

Success factors of small and medium sized enterprises
Peschel, Stefan
2012 - English Předložená disertace je zaměřena na identifikaci klíčových aspektů, kterým by malé a střední podniky (MSP) v Německu měly věnovat pozornost s cílem zajištění své dlouhodobé existence na volném trhu. Disertace přináší kritickou analýzu a výzkum faktorů úspěchu, které pomáhají podnikatelům v jejich rozhodování a řízení organizací. Nejdůležitějším faktorem úspěchu je dle respondentů prováděného dotazníkového šetření a řízených rozhovorů je vytrvalost těsně následovaná flexibilní strukturou. Dále je dle respondentů pro založení a řízení úspěšného MSP v Německu a jeho dlouhodobé přežití na volném trhu nezbytná podpora a rodinné zázemí. Další nezbytné předpoklady úspěchu MSP zahrnují inovativní přístupy k procesům a produktům, stejně jako kompetentní zaměstnance. Významné faktory úspěchu MSP, které rovněž pozitivně korelují s jejich výkonností, souvisejí též s osobností vlastníka a rodinným zázemím. Osoba vlastníka je považována za klíčový faktor úspěchu MSP, neboť vytrvalost a osobnost vlastníka/manažera, jeho "pocitová" rozhodnutí a vizionářské vedení jsou přímo vázány k osobě vlastníka či rodinnému zázemí. Tyto čtyři aspekty související s osobností vlastníka byly respondenty průzkumu řazeny mezi jedenáct faktorů identifikovaných jako nejvýznamnější. U zkoumaných MSP se projevuje jednoznačná tendence řízení s ohledem na jejich dlouhodobou existenci s častým uplatněním diferenciační strategie a za úspěch je v nich považována tvorba hodnot pro budoucnost a ne prosté finanční ukazatele. This dissertation focuses on identification of key aspects small and medium sized enterprises in Germany should pay attention to in order to survive on the free market. The dissertation comes up with critically analysed and researched success factors that support entrepreneurs in their decision making and steering of their enterprise. The most important factor for success regarding the respondents of the survey and interviews is the power of endurance closely followed by the aspect of flexible structures. Additionally it seems to be important to have support and backing from the family in order to own/manage/found a successful small and medium sized enterprise in Germany and survive on the free, self regulating market. Furthermore innovation in processes and products show significance towards being relevant for a successful SME. Another aspect that seems to be important for these German SMEs are competent employees. There are certain aspects that show significance towards a successful small and medium sized enterprise that are related to the owner and family. The owner seems to be one key aspect for a successful SME, as power of endurance, the personality of the owner/manager, "gut-feeling" decisions of the owner and a visionary leadership all relate to the personality of the individual owner or family. These four aspects relating to the personality of the owner are all ranked under the first eleven success factors of the survey. Researched SMEs tend to be steered and managed with a long-term perspective with the strategy of differentiation and rather consider success as creating values for the future not simply monetary profit. Keywords: faktory úspěchu; malé podniky; střední podniky; podnikatelská strategie; rodinná firma Available to registered users in the Library of Mendel University. Success factors of small and medium sized enterprises

Předložená disertace je zaměřena na identifikaci klíčových aspektů, kterým by malé a střední podniky (MSP) v Německu měly věnovat pozornost s cílem zajištění své dlouhodobé existence na volném trhu. ...

Peschel, Stefan
Mendelova univerzita v Brně, 2012

Vegetation structure and diversity of woody plants in Hamusit and Jawi woodlands, Amhara National Regional State, Ethiopia
Alemu, Biresaw M.
2009 - English Keywords: dřeviny; Etiopie Available to registered users in the Library of Mendel University. Vegetation structure and diversity of woody plants in Hamusit and Jawi woodlands, Amhara National Regional State, Ethiopia

Alemu, Biresaw M.
Mendelova univerzita v Brně, 2009

Virus pathogens on gladiolus, iris and tulips
Duraisamy, Ganesh Selvaraj
2009 - English Keywords: diagnostika; okrasné rostliny; virové patogeny; ochrana rostlin Available to registered users in the Library of Mendel University. Virus pathogens on gladiolus, iris and tulips

Duraisamy, Ganesh Selvaraj
Mendelova univerzita v Brně, 2009

Transformation of sun energy in the forest ecosystems solved on the level of photosyntetic induction with regard to the ecophysiological aspects
Zitová, Martina
2009 - English Souhrn česky Keywords: fotosyntéza; fluorescence; dynamický světelný režim Available to registered users in the Library of Mendel University. Transformation of sun energy in the forest ecosystems solved on the level of photosyntetic induction with regard to the ecophysiological aspects

Souhrn česky

Zitová, Martina
Mendelova univerzita v Brně, 2009

The import of establishing financial market in libyan economy
Ajbiri, Atiya Milad
2008 - English Keywords: ekonomika; finanční trhy; Libye Available to registered users in the Library of Mendel University. The import of establishing financial market in libyan economy

Ajbiri, Atiya Milad
Mendelova univerzita v Brně, 2008

Impact of microcystin containing diets on Nile tilapia (Oreochromis niloticus) = Vliv krmiv obsahujících microcystin na tilapii nilskou (Oreochromis niloticus)
Ziková, Andrea
2008 - English Keywords: tilapie nilská; microcystin; krmiva Available to registered users in the Library of Mendel University. Impact of microcystin containing diets on Nile tilapia (Oreochromis niloticus) = Vliv krmiv obsahujících microcystin na tilapii nilskou (Oreochromis niloticus)

Ziková, Andrea
Mendelova univerzita v Brně, 2008

"Application of agrometeorological models for agricultural drought assessment" = "Aplikace agrometeorologických modelů při posuzování zemědělského sucha"
Hlavinka, Petr
2008 - English Keywords: agrometeorologie; evapotranspirace Available to registered users in the Library of Mendel University. "Application of agrometeorological models for agricultural drought assessment" = "Aplikace agrometeorologických modelů při posuzování zemědělského sucha"

Hlavinka, Petr
Mendelova univerzita v Brně, 2008

The impact of cocoa industry development on the economy og Ghana
Darkwah, Samuel Antwi
2007 - English Keywords: ekonomika; Ghana; kakaový průmysl Available to registered users in the Library of Mendel University. The impact of cocoa industry development on the economy og Ghana

Darkwah, Samuel Antwi
Mendelova univerzita v Brně, 2007