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International Trade with Flowers
HRUŠKOVÁ, Ivana
The aim of this thesis is to analyze international trade with flowers focusing on the largest producers and exporters. Another aim is to identify critical points in the import into the Czech Republic. The theoretical part gives the ways of transport and certification of flowers, problems with trading and peculiarity in sales are also discussed in this thesis. The qualitative method of research is used in the practical part. It is a method of controlled interviews with flower buyers and their future comparation. Respondents were selected by random sampling. The interviews are used to gather information about the problematics. The questions mainly concern the purchase of flowers, their transport, storage and frequency of purchase. The gained information is summarized at the end of the thesis.
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Educative possibilities on flowers and fruits morphology in examples of important plant species
SLÁDKOVÁ, Eva
The diploma thesis follows up on the issues addressed in the bachelor's thesis. It focuses on the possibilities of teaching the morphological structures of flowers and fruits of flowering plants. The results are transformed into a form that can be used effectively in teaching. The work contains several teaching materials. Specifically, two chapters which introduce teaching presentations and worksheets on the topic of Flower and Fruit.
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Boo Boo
Švantnerová, Izabela ; Fišerová, Lucia (referee) ; Gravlejs, Ivars (advisor)
We dedicate ourselves to the time of our rest, which many of us look forward to all day long. However, there are those among us who do not consider night, dreaming and sleep to be a time of rest. Sleep disorders are an unpleasant part of many of us and are becoming an increasingly discussed topic / problem. Sleep paralysis does not give us obvious answers to reality and dream - The work deals with monsters that become our houseplants during the night. And it is these monsters that are the basis for the ominous sleep experience. How else to deal with fear than to get to know him and understand him. So we create an "encyclopedia" of night monsters / flowers, based on which are illustrations of different people from different groups, working with the supplied materials and creating prototypes of a scary creature.
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The importance of the arrangement of flowers in the inflorescence on the plant reproductive success
Chvojková, Karolína ; Štenc, Jakub (advisor) ; Sklenář, Petr (referee)
Inflorescence and its properties have a fundamental influence on the pollinating behavior of pollinators, which can affect the resulting reproductive success of plants. Clustering of more flowers in the inflorescence is an advantage for plants due to the diversification of pollen sources and greater visual supply, which can attract more pollinators and thus increase the chance of pollen transfer to other individuals and ensure genetic variability of the offspring. The disadvantage of multiple flowers in one inflorescence may be both an increase in energy requirements for the formation and maintenance of multiple flowers and an increased risk of geitonogamy. Plants prevent geitonogamy within the inflorescence by various adaptations. The aim of this work is to evaluate the effect of inflorescence arrangement on successful plant reproduction. When studying the arrangement of flowers in the inflorescence, it is necessary to take into count not only their morphology, i.e. the shape, number, size and arrangement of flowers, but also other functional properties in the form of genitals, sterility and rewards. The resulting effect of flower arrangement on the reproductive success of plants also depends on the vectors that transfer pollen, in this case especially insect pollinators, which are affected by...
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Selected alcohol extracts of Sambucus nigra for use in cosmetology
Balonková, Daniela ; Doležalová Weissmannová, Helena (referee) ; Zemanová, Jana (advisor)
This thesis focuses on the preparation of selected alcohol extracts of elderberry and their use in cosmetology. In the theoretical part are described the botanical properties of the elderberry (Sambucus nigra). There are introduced and characterized bioactive compounds and toxic compounds contained in all vegetative parts of the plant. Attention is mostly focused on compounds with antioxidant properties. The theoretical part also contains a description of basic analytical methods, which are used in the practical part to characterize compounds contained in elder flowers. The practical part focuses on the optimization of the preparation of alcohol extracts with the aim to prepare the extract with the greatest possible content of polyphenols with respect to economy and production costs. Factors such as selection of the appropriate solvent, solvent to plant material ratio, solvent temperature, and extraction time are examined. Based on the total polyphenol concentration measured spectrophotometrically by the Folin-Ciocalteu method, the most suitable solvent is 60% ethanol, the ratio of plant material to solvent is 1:8, the laboratory temperature of solvent and the extraction time of 24 hours.Under these conditions, an ethanol extract is prepared, analyzed and determined selected properties, such as refractive index and density. Rutin, chlorogenic, caffeic and ferulic acids are identified by HPLC with a DAD detector. The pH value of alcohol extract is 5.743 ± 0.006, the refractive index is 1.365 ± 0.02 at 22.7 ° C and the density is 0.9288 gcm-3. By liquid chromatography the concentration of chlorogenic acids is quantified as 0.104 gl-1, caffeic acid as 0.086 gl-1 and ferulic acid as 0.060 gl-1. The extract is incorporated into cosmetic products, that are used in balneology. Prepared products are toilet soap and bath salt.
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Flowers and fruits of important plant species - materials for teaching at elementary schools
SLÁDKOVÁ, Eva
Sládková E.: Flowerage and fruits of significant plant species basics for teaching at primary school. Bachelor thesis, 2017 Bachelor thesis is aimed for knowledge of pupil of the 8th classes concerning flowerage and fruits, which pupils learned half year ago. Next part of this thesis is about approach of pupils to botany. Thesis includes evaluation of the test and guestionnaire. Next part of the thesis is also analysis of the properties of the four textbooks, which are most often used in the teaching of higher plants. The results are for the better clarity shown by column graph and doughnut chart. Leader of Bachelor thesis: RNDr. Božena Šerá, Ph.D. Department of biology PF JU, České Budějovice
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Image based flower recognition
Jedlička, František ; Kříž, Petr (referee) ; Přinosil, Jiří (advisor)
This paper is focus on flowers recognition in an image and class classification. Theoretical part is focus on problematics of deep convolutional neural networks. The practical part if focuse on created flowers database, with which it is further worked on. The database conteins it total 13000 plant pictures of 26 spicies as cornflower, violet, gerbera, cha- momile, cornflower, liverwort, hawkweed, clover, carnation, lily of the valley, marguerite daisy, pansy, poppy, marigold, daffodil, dandelion, teasel, forget-me-not, rose, anemone, daisy, sunflower, snowdrop, ragwort, tulip and celandine. Next is in the paper described used neural network model Inception v3 for class classification. The resulting accuracy has been achieved 92%.
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Antioxidant properties of Sambucus nigra flowers. II
Kozoňová, Pavlína ; Spilková, Jiřina (advisor) ; Martin, Jan (referee)
Drug Sambuci nigrae flos - Sambuci nigrae flos is obtained from the wild plants. The drug is primarily used to help reduce the symptoms of colds and flu. Elder flower provides antioxidant, anti-inflammatory, anticancer and diuretic effects. The main substances are flavonoids and hydroxycinnamic acid. Elderflowers from bred cultivars are not used to obtain drug so far. The aim of this work was to determine antioxidant acitivitiy of extracts of eldeflower cultivars. Cultivars ′Albida′, ′Allesö′, ′Aurea′, ′Bohatka′, ′Dana′, ′Haschberg′, ′Heidegg 13′, ′Juicy′, ′Korsør′, ′Mammut′, ′Pregarten′, ′Riese aus Voßloch′, ′Sambo′, ′Sambu′, ′Samdal′, ′Sampo′, ′Samyl′, ′Tulbing′ and ′Weinhenstephan′ were analyzed. Antioxidant activity was measured spectrophotometrically using DPPH ((2,2-diphenyl-1-picrylhydrazyl) radical method. Results of antioxidant activity were expressed as IC50 (concentration required for 50% reduction of the DPPH radical). The measured values are in the range 0.0419 - 0.0772 mg/ml. Cultivars 'Heidegg 13', 'Albida', 'Tulbing' showed the highest antioxidant activity, whereas the lowest activity was found in 'Pregarten','Korsør' and 'Allesö' clutivars.
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