No description available.

The aim of this study was to determine the quantities of nitrate content in potatoes and in common vegetables, available all year round, and trace the health safety of vegetables offered in the trade network in the city Prachatice in years 2011 - 2012.

No description available.

The dissertation thesis is focused on investigation of possibilities of usage NIR spectroscopy for nutritional composition of fruit and vegetables evaluation. The basic nutritional components of fruit and vegetables, methods of apples, peaches and tomatoes storage are characterized in the literary section. The history of infrared spectroscopy, present, principles and types of NIR spectroscopy analyses are described in detail. The possibilities of usage of NIR spectroscopy in food industry aimed on fruit and vegetables quality evaluation are also described in the literary section. Changes of fruit and vegetables nutritional composition during ripening are evaluated in the experimental part. Evaluated fruit and vegetables were apples (variety Rubinola), tomatoes (variety Dagmar) and peaches (variety Redhaven). Changes in the total polyphenols content, titratable acids, soluble dry matter, malic acid, ascorbic acid, citric acid, peel firmness and apple flesh firmness were evaluated. Calibration models were prepared from the gained data using the NIR spectroscopy method. The changes of stored fruits nutritional composition were evaluated using the created calibration models. Soluble dry matter, titratable acids, ascorbic acid and flesh firmness of different apple, peach and tomato varieties can be determined fast and exactly according to the data. The accuracy of models for total polyphenols and peel firmness is significantly influenced by the number of calibration standards. The accuracy of models for malic and citric acids is influenced by the concentration of these components in fruits.

The two-year experiment (2010, 2011) dealt with the evaluation of yield and quality parameters of vegetables Capsicum annuum L., variety 'SLÁVY F1' and Allium porrum L., 'GIGANTE SUIZO' treated with mycorrhizal product SYMBIVIT in two irrigation modes. The research was conducted as a field experiment. The site was located on the properties of Faculty of Horticulture MENDELU, Mendeleum, Lednice. The positive effect of the mycorrhizal preparation as an intensifying factor was statistically proven in the quality of pepper seedlings. The set parameters were: plant height, stem diameter and increase of the number of leaves. The set parametres in the quality of leek seedlings were: stem diameter, length of the above-ground part, the length of the underground section, weight of fresh roots, weight of roots after drying. The positive effect of the mycorrhizal preparation as an anti-stress measure was proven in the evaluation of yield of peppers in 2011. The positive effect of the mycorrhizal preparation as an anti-stress measure was also proven in the evaluation of yield of the 1st grade quality of peppers in 2011 and in the quantity of nitrates in leek planted in 2010. The positive effect of mycorrhizal preparation as an intensifying factor or as an anti-stress measure on the other evaluated parameters was not proven.

STEHNOVÁ, N., Shopping behaviour of consumers on the vegetable market in the Czech Republic. Diploma thesis. Brno: Mendel University in Brno, 2020. The diploma thesis describes the situation on the vegetable market in the Czech Republic. The first part of the thesis monitors the development of sowing areas, harvest, consumption, consumer prices and the development of foreign trade of vegetables in recent years. The next part of the thesis deals with factors affecting shopping behaviour of consumers on the vegetable market. These consumers are further divided into individual segments by means of cluster analysis. Not least, the thesis also includes the research of Czech vegetable producers. At the end of the thesis are formulated recommendations for the consumers, producers and traders on the vegetable market.

The object of this research was follow up the cumulation of nitrates in individual kinds of vegetables. Analysed was 240 samples of root crops, cole crops and potatoes distributed in the trade network in Humpolec in the years 2008 - 2010. The measurement results show that all the vegetables went beyond the nitrate permitted limit, according to a law n. 53/2002. The most frequently it was in potatoe samples (50 % samples). The next was a carrot (27 %), kohlrabi (25 %), broccoli (24 %) and celery (17 %). From aspect cumulation of nitrates is parsley unchallenged kind of vegetable. Permitted limit was transcendent in 10 % about less than 1 %. The origin of the vegetables was detected as well. Czech republic had the worst results (52,5 %) because of the high nitrate concentration in potatoes. It is grown by a domestic growers. Spain had 20 % in broccoli and kohlrabi. It is imported to our market. Although the high nitrate concentration in some vegetable samples the vegetable influence the human health in a positive way and it doesn?t make health hazard.

The thesis was aimed to the problems of storing and changes in quality characteristics (weight, measurements, colour, firmness, soluble solids content and acidyty) for selected specie and varieties of fruit vegetables. From fruit vegetables were evaluated tomatoes (Lycopersicon esculentum, L.) and varieties 'Bejbino F1', 'Duo', 'Torino F1', 'Tornado F1', 'Toro F1' a 'Zlatava'. All varieties were harvested in the same time, stockholding in refrigeration and regularly instrumentally and sensorially evaluated. The results were processed graphically and statistically.

High level of agricultural products processing and especially better storage of products currently represent one of the hottest topics. At the same time, there is a lot of effort to grow crops without chemical substances. Root vegetables, which are consumed a lot, are prone to many harmful and damaging influences. There are several risk factors, including a long vegetation period. This creates an opportunity to use natural substances, in particular essential oils. Their effects are used in various different fields because they are safe for the environment as well as for the human health and the area of food commodities treatment. This study focuses on antibacterial activity testing of several essential oils: satureja, cinnamon, clove, thyme and oregano. Carrot, garden parsley and celery were chosen as representatives of root vegetables. The antibacterial activity was measured by the broth microdilution method. Even though the vegetables were inoculated with pathogenic bacteria, putrefaction did not develop in the specific places. Therefore an isolate from the parsley and the celery was then used to identify several other microorganisms by the MALDI TOF mass spectrometry. Consequently, the minimum inhibitory concentration of essential oils was again tested against these bacteria in in vitro conditions. There was a demonstrable positive result: the most frequent minimum inhibitory concentration of the cinnamon essential oil was 0.128 mg/ml. At this level the essential oil inhibited eight out of the seventeen tested microorganisms. The other tested essential oils showed some inhibition activity at least against one bacterium in in vitro conditions.

The presented diploma thesis entitled "Vegetable in nutrition and possibilities of its consumption increase" takes two parts theoretical and practical. The theoretical part describes vegetables in terms of their properties, possibilities of use and also deals with their consumption. Consumption of vegetables is described at the level of the Czech Republic compared to foreign data, captures the possible influences affecting its consumption and at the same time describes some existing support programs to increase its consumption. The practical part is composed of two parts - questionnaire survey among 150 respondents and own experimental activities aimed at finding an influence on consumption of vegetables in children of primary school elementary school with attractive treatment before consumption. A questionnaire survey of 150 randomly selected respondents divided into 3 age categories (3-11 years, 12-19 years, 20-50+ years) was found: Of the total number of responses, 28,4 % of the respondents correctly stated the value of the recommended daily amount of vegetables. There was no difference between men and women in the preference of consumption of fresh vegetables before the modified.When eating vegetables during the day, only 12 % of respondents consume vegetables even at breakfast. Of the total 12 % of respondents eating breakfast vegetables, only 22 % were men. In our own experimental activity, 300 children aged 6-11 years who were offered a choice of eating vegetables in a regular and attractive way (in the form of a wagon and a frog) during lunch in the school canteen, found that attractive vegetable treatment. The first rating preferred a total of 54,6 % of children. The most prominent age group was 6-7 years old and 9-10 years of age. An attractive vegetable dressing (wagon) served at the same time to increase the consumption of vegetables by 50 % compared to a standard portion of consumed vegetables as a lunch supplement. In the re-evaluation the shape was changed to the shape of a flip-flop and a new kind of less attractive vegetable - peas was added. This attractive treatment of vegetables was preferred by 69,9 % of children, in the age groups of 6-7 years, 7-8 years and 8-9 years. A particular way of making an attractive form (wagon, frog) influences the effect of preference, while giving some possibility of increasing its consumption.