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Vitamin C
Juráňová, Jana ; Hrstka, Miroslav (referee) ; Vespalcová, Milena (advisor)
The theme of this diploma thesis is an assessment of given nutritional parameters in selected kinds of lesser known fruits, specifically 10 varieties of sea buckthorn (Hippophae rhamnoides L.), 12 varieties of cornelian cherry (Cornus mas L.) and 6 varieties of blue honeysuckle (Lonicera caerulea var. kamtschatica). Harvests of two consecutive years (2011 and 2012) were analyzed in the case of blue honeysuckle. The theoretical part was focused on historical, morphological, taxonomic and nutritional aspects of individual plants and food or pharmaceutical utilization. The considerable part of the thesis is devoted to the characterization and the possibilities of determining the contained substances, namely ascorbic acid and polyphenolic compounds, especially anthocyanins. The content of the experimental part was a description of the methods and the results of the analysis of total solids, titratable acidity, total phenolics, total anthocyanins and ascorbic acid in fruits of the selected varieties of the above mentioned fruit species. Based on the measured results, the different varieties of fruits were compared to each other and evaluated.
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Comparison of vitamin C content between less known kinds of fruit
Mařáková, Veronika ; Hrstka, Miroslav (referee) ; Vespalcová, Milena (advisor)
This thesis deals with the determination of vitamin C in different varieties of cornelian cherry (Cornus mas) and mountain ash (Sorbus aucuparia). The theoretical part describes the botanical characteristics of both plants, the extension in the CZ and in the world, methods of reproduction, the content of meaningful health substances and the importance of both plants in food-processing industry. Attention is paid to vitamin C, which is in their fruits in high quantity. Conclusion of the theoretical part discusses various methods of determination of vitamin C. The aim of the experimental part was to comparison of the vitamin C content in different varieties cornelian cherry and mountain ash. The chosen method for the determination of vitamin C by high performance liquid chromatography (HPLC) with UV detection was first tested on standards. Selected validation parameters of this method was then determined. Validated method was used to determine the content of vitamin C in nine varieties cornelian cherry and six varieties of the mountain ash. For comparison were also tested some samples of the determination of total vitamin C after reducing dehydroascorbic acid by using dithiothreitol (DTT).
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Evaluation of Physical and Chemical Parameters of Still Less Exploited Species of Small Fruit and Proposal of a New Soft Drink from this Fruit
Cetkovská, Jitka ; Krška,, Boris (referee) ; Barták,, Petr (referee) ; Omelková, Jiřina (advisor)
This thesis deals with still less expolited species of small fruit, evaluation of its physical and chemical parameters and proposal of a new soft drink from one of the studied species of furit. Firstly, for the characterisation of basic nutrition parameters (dry matter, content of organic acids and saccharides) and biologicaly active substances (vitamin C, anthocyanins and phenolic compounds) suitable titration, spectrophotometric, chromatographic and electrophoretic methods were chosen, optimized and validated. The sample preparation procedure was optimized as well. For three years (2010–2012) the content of listed parameters was monitored in some cultivars of five species of small fruit: in seven cultivars of sea buckthorn, in ten cultivars of cornelian cherry, in twelve cultivars of rowanberry, in two cultivars of chokeberry and in seventeen cultivars of elderberry. By means of Duncan’s test, analysis of principal components (PCA) and cluster analysis (CLU) the main differences between studied cultivars were observed mainly in sea buckthorn and rowanberry, where single cultivars were easily distinguishable from others on the basis of genetic origin. On the basis of comparison of determined parameters in studied species of fruit and with collaboration with fruit processing company the suitable species of fruit for commercial utilization was chosen – elderberry, as a important source of anthocyanins and phenolic compounds. A new soft drink as a proposal of utilization of this fruit was created – fruit juice or nectar with portion of elderberry juice. Mixed juices and nectars with various composition were prepared from elderberry and grape juice and the sensory analysis of these drinks was performed. The best evaluated were 100% fruit juices prepared with 30–50% portion of elderberry juice. The composition was jurally protected. On the basis of this protection the product consisted from 100% fruit juice with 10% of elderberry component mixed with apple and grape juice was introduced to the market by the fruit processing company.
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Hodnocení růstových a sklizňových údajů netradičního ovocného druhu - dřínu obecného
Shromáždil, Filip
This thesis examines the growth and harvesting characteristics of the non-traditional fruit species of dogwood. The work in the explanatory section deals with the origin of this fruit shrub, its distribution, the demands it makes on the environment, its growth properties and propagation technology. Then it describes the chemical composition of the fruit and possibilities for using it in the food industry or in horticulture. The selection of six dogwood species (´Elegant´, ´Fruchtal´, ´Jolico´, ´Lukjanov´, ´Vydubec´ and ´Vyshegorod´) was evaluated at an experimental area of the breeding institute in Zabcice. For each variety, we examined and compared the extent of the phenological phases, the size of the bush volume, the size of the fruit harvest and both external and internal features of the fruit. This last observation involved evaluation of the length, width and weight of the fruit, the proportions and weight of the stone, plus the levels of vitamin C, dry matter and refractometric dry matter. The results obtained from the measurements were processed and statistically evaluated. Through a combination of our results and reference to expert studies, we are able to recommend the most suitable varieties for cultivation under our climatic conditions.
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Hodnocení růstových a sklizňových údajů vybraných odrůd a genotypů dřínu obecného
Hašková, Lenka
The aim of the bachelor thesis was to find out and evaluate the growth and harvesting properties and their subsequent evaluation in the selected group of varieties of Cornus mas L. in the monitored period 2018. The general part deals with the characteristics of Cornus mas L., its history and use. Further is described agrotechnics, expanding, its demands on growing, propagation, planting and harvesting. A selected set of 6 varieties of Cornus mas L., was evaluated on the experimental plot in Žabčice. Phenological phases, growth and harvesting properties were monitored. The information obtained was processed and evaluated. According to the results achieved, the most suitable varieties were recommended for cultivation. Dogwood can be recommended for larger production plantings and further expansion among small.
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Hodnocení růstových a sklizňových údajů netradičního ovocného druhu - dřínu obecného
Karásková, Petra
The diploma thesis is focused on finding and evaluating growth and yield indicators for selected assortment of cornelian cherry varieties (Cornus mas L.). The evaluation took place on the grounds of ŠZP Žabčice in 2018-2019. The diploma thesis offers an overview of the history, origin, occurrence and demands of the environment and agrotechnics in cornelian growing. The literature review describes botanical characteristics, propagation, planting, harvesting, wide range of uses and evaluated varieties. Part of the practical section was to compare yields, internal and external features of fruits and content substances. Based on the evaluation, recommend suitable varieties that are optimal for growing in Czech Republic.
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Hodnocení růstových a sklizňových údajů vybraných odrůd a genotypů dřínu obecného
Nováková, Jana
This bachelor thesis is focused on ascertaining of the growth and harvesting properties and subsequently on evaluation of phenological phases of a few varieties of Cornelian cherry (Cornus mas L.) in the growing season 2016. The thesis includes the general part dealing with the history, origin and distribution of the species, the method of propagation and cultivation. It also discusses the importance of the nutritional value of the fruit and its chemical content. The thesis also contains an information about the possibility of using Cornelian cherry in ornamental ladscaping and food processing industry. The experimental part of the work was secured on an experimental plot in Žabčice. I evaluated fice varieties of Cornelian cherry (Fruchtal, Vydubecký, Vyšegorodský, Lukjanovský and Elegantní). Phenological phases of different Cornelian cherry varieties were observed. Furthemore, there was carried out the measurement of growth parameters (cubic bushes, fruit size) and evaluation of harvesting parameters (yield of plants, weight of individual fruits). I assessed pomological characteristics, determined the content of vitamin C and evaluated the taste of the fruit of the individual varieties. Overall results of the measurements were processed and evaluated statistically. The obtained values were arranged in tables, diagrams and described in detail. According to the determined values we can pass on an information about the best variety for cultivation and subsequent processing. Cornelian cherry among rarely widespread fruit species in the Czech Republic. Because of his modesty during cultivation, resistace to pesticides and diseases and high nutritional values it could be further exploited again. New and interesting varieties of fruit are being growned. Also, a more appropriate method of growing on the trunk is used. This advance in growing could be beneficial for extending of this kind of fruit.
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Studium antioxidační kapacity vybraných druhů drobného ovoce
Hromadová, Hana
The bachelor Studies of antioxidant capacity of selected species of small fruit was drafted in the years 2015-2016 at the Institute of Post-Harvest Technology of Horticultural Products of Horticultural Faculty, Mendel University in Brno. The aim of the study was to characterize antioxidant substances and their effects on human health. Further to describe the ingredients with antioxidation effect in fruit of selected species of small fruit. Based on laboratory experiments to verify experimentally antioxidant capacity of selected species of small fruit. It was observed a total of 13 varieties, including 4 species, Cornus mas, Sorbus acuparia, Hippophae rhamnoides and Lonicera caerulea var. kamtschatica. To evaluate the antioxidant capacity were chosen FRAP and DPPH methods.
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Evaluation of Physical and Chemical Parameters of Still Less Exploited Species of Small Fruit and Proposal of a New Soft Drink from this Fruit
Cetkovská, Jitka ; Krška,, Boris (referee) ; Barták,, Petr (referee) ; Omelková, Jiřina (advisor)
This thesis deals with still less expolited species of small fruit, evaluation of its physical and chemical parameters and proposal of a new soft drink from one of the studied species of furit. Firstly, for the characterisation of basic nutrition parameters (dry matter, content of organic acids and saccharides) and biologicaly active substances (vitamin C, anthocyanins and phenolic compounds) suitable titration, spectrophotometric, chromatographic and electrophoretic methods were chosen, optimized and validated. The sample preparation procedure was optimized as well. For three years (2010–2012) the content of listed parameters was monitored in some cultivars of five species of small fruit: in seven cultivars of sea buckthorn, in ten cultivars of cornelian cherry, in twelve cultivars of rowanberry, in two cultivars of chokeberry and in seventeen cultivars of elderberry. By means of Duncan’s test, analysis of principal components (PCA) and cluster analysis (CLU) the main differences between studied cultivars were observed mainly in sea buckthorn and rowanberry, where single cultivars were easily distinguishable from others on the basis of genetic origin. On the basis of comparison of determined parameters in studied species of fruit and with collaboration with fruit processing company the suitable species of fruit for commercial utilization was chosen – elderberry, as a important source of anthocyanins and phenolic compounds. A new soft drink as a proposal of utilization of this fruit was created – fruit juice or nectar with portion of elderberry juice. Mixed juices and nectars with various composition were prepared from elderberry and grape juice and the sensory analysis of these drinks was performed. The best evaluated were 100% fruit juices prepared with 30–50% portion of elderberry juice. The composition was jurally protected. On the basis of this protection the product consisted from 100% fruit juice with 10% of elderberry component mixed with apple and grape juice was introduced to the market by the fruit processing company.
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Pěstitelský a hospodářský význam pěstování dřínu obecného
Získalová, Lucie
The project is focused on application of not traditionally used art - cornelian cherry. On the experimental plantation in Žabčice owned by Breeding and re-production Department of cultivated plants" as a branch of Gardening and landscaping faculty of Mendel University" in Brno has been made a harvest of six cornelian cherry species. The plant and harvest data has been evaluated and the fruit sample has been used for a laboratory analysis and for preserve production. The products quality parameters has been tested and evaluated. KEY WORDS: cornelian cherry, harvest data, growth data, vitamin C, fruit pre-serve product, jam.
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