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Koncentrace vybraných fytoestrogenů v krmné dávce dojeného skotu a jejich distribuce do krve a mléka
Bařinová, Michaela
Diploma thesis on the theme Concentration of selected phytoestrogens in the diet of dairy cattle and their distribution in to the blood and milk deals about transmittance of phytoestrogens from real fed TMR in the South Moravian conventional breedings of dairy cows into the blood plasma of animals and to milk as a product intended for hu-man consumption. A review of literature is devoted to the occurrence of phytoestrogens in forage and feed, their metabolism and effects on animals and humans. The experimental part of the thesis is devoted to the identification and quantification of selected phytoestrogens in feed and their penetration into blood plasma and milk. Determination of phytoestrogens was performed by HPLC - MS analysis.
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Sója a jej vplyv na ľudské zdravie
Saganová, Sabrina
Soy is currently a very popular food. Although the views of individual researches are not entirely clear, it is assumed that the consumption of soy and soy products has a positive effect on our health. This bachelor thesis deals with about soybeans as a food that contains healthy substances. The first part of the work characterizes the plant and the view of soybeans from a chemical point of view. The most positive significance are phytoestrogens, the content of which was also investigated in the experimental part. The second half of the work points out the positive and negative effects that are caused by diet containing soy.
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Sója - funkční potravina
Zedníčková, Pavlína
This diploma thesis is about soybean as functional food. Functional food contain components with positive effect on human health. In soybean there are lot of these components and very valued are phytoestrogens. Phytoestrogens has estrogenic activity with positive effect in prevention of osteoporosis, breast and prostate cancer, cardiovascular disease and menopausal problems. In experimental part was measured level of isoflavones in different kinds of soy food. The method for separation was high performance liquid chromatography with mass spectrometry.
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Význam biologicky aktivních látek ve funkčních potravinách
Tomášková, Lenka
We live in tough times. We experiencing high fyzical and psychical pressure whitch corrupting our healthy livestyle. This restriction takes its toll in the form of lifestyle diseases such as diabetes mellitus or obesity. That's why I decided to concentrate my bachelor thesis to healthy nutrition in the form of functional foods. I belive that conclusions of this thesis can show the way to people whos looking for healthy life. Literary part of this work is focused to functional foods, their general characteristics and the main representatives. Furthermore, the importance of biologically active substances contained in them. I pay attention only few of them because huge range of this topic. From the group of antioxidants for example vitamin E and vitamin C and from the micronutrients selenium and carotenoids. I also examine fiber becouse of high incidence of colorectal cancer disease in the Czech Republic. The experimental part of my work is focused on phytoestrogens, their structure, content in foods and effects on human health. I'm extracting phytoestrogens using the high-performance liquid chromatography in the scope of the experiments of various plant materials.
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Vliv stravovacích zvyklostí na výskyt nádorových onemocnění
Fabianová, Jana
Bachelor thesis entitled The influence of dietary habits on the incidence of cancer in the literature review discusses the importance of nutrition in disease prevention. Describes some negative factors on human health. It also deals with the issue of phytoestrogens, their occurrence in foods and their effect on human health. The last section focuses on recommendations of daily routine and diet for people with a genetic predisposition to cancer. The practical part deals with the evaluation questionnaires from respondents with cured cancer.
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Sója z pohledu obsahu sekundárních metabolitů a její vliv na výživu člověka
Holá, Julie
This bachelor´s thesis written on theme „Soy from the perspective of secondary metabolites and its effect on human nutrition“ summarizes findings on the effect of soybean and soyfoods consumption on human health. The beginning of the thesis deals with worldwide and national production of soybean. Next part of the thesis deals with substance composition of soybean. The part devoted to secondary metabolites summarizes secondary metabolites contained in soybean, their properties, content and method of determination. The thesis also discusses the content of antinutritional factors and its effect on the human body. The last part describes the production a properties of non-fermented and fermented soyfoods in terms of the content of biologically active substances.
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Fytoestrogeny v potravinářství
Došková, Markéta
Phytoestroegens are biologically active compounds naturally occuring in plant materials. This group consists mainly of polyphenols characterized by structural similarities with female hormone 17-beta-estradiol. Plants produce phytoestrogens as their secundary metabolities, primarily due to the reaction as a response to various stress. Agents with estrogen effect contained in foodstuffs bring very positive impact on our health. On the other hand, some of the estrogen compounds may be harmful to the health depending on the concentration and the complex state of the consumer, as well as mycoestrogens, xenoestrogens and antiestrogens. Also for this reason is necessary to detect and quantify them in the sample of food. The major problem encountered in the studies of their effect is large amount of a variety of other substances in biological material, and according to their complicated structure was important to establish a reliable method, that was used also in the practical part of my experiment. It is an UPLC-MS/MS -- combination of Ultra High Performance Liquid Chromatography and Tandem Mass Spectrometry preceded by complex sample preparation which involves also SPE purification ("solid phase extraction").
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Estrogenní účinky sóji a její dopad na lidský organismus
Pilátová, Lucie
Over the past few years, healthy eating and its impact on health has become one of the most discussed topics. In connection to this, in Europe, there was partly a change in eating habits, structure, and constituents of nourishment. Some food types were phased out, yet some became more popular. Thanks to this, even soybean consumption increased. This bachelor´s thesis, on topic Estrogenic effect of soybean and it’s impact on human organism, discusses soybean as a plant, its nutrition value, the impact of individual constituents on the health of the consumers as well as different products made from soybean and its beneficial impacts on health. Besides the advantages of soy consumption, this thesis discusses the negative effects of soy on health and nutritional value, outgoing from the content of antinutritional substances and its allergenic effects. The main part of this thesis examines physiologically active substances, especially phytoestrogens, that can be found in soybean. These substances are likely to be mentioned in connection to its estrogenic and also anticarcinogenic effects.
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Monitoring of Phytoestrogens Expression to the Milk and Milk Products
Watzková, Jarmila ; Rittich, Bohuslav (referee) ; Doležal, Petr (referee) ; Omelková, Jiřina (advisor)
Phytoestrogens are very intensively studied in recent years because they show different pharmacological effects on human health. For example, it was demonstrated that phytoestrogens reduce the risk of certain cancers (breast, prostate or colon), act as antioxidants in the body and affect the activity of certain enzymes. In addition, also it was demonstrated number of positive effects of soybean phytoestrogens on the health status of women in the menopause, such as reducing the risk of atherosclerotic cardiovascular disease or osteoporosis. Various technologically processed soy beans are important part of the feed rations mainly for high-lactating dairy cows, because they are a valuable source of the energy and high-quality protein, despite their negative effect on reproductive performance. Phytoestrogens consumed from the feed rations are hydrolyzed in the rumen of dairy cow and together with their metabolites are absorbed in the small intestine into the blood. They can be excreted from the body in urine or milk. From this perspective, cow's milk may become a source of phytoestrogens substances, especially equol in the human nutrition. On the other hand, some research results suggest possible potential risks associated with phytoestrogens intake in the diet on human health. At the some age (infants and young children) and group (vegetarians) categories may be dietary intake of phytoestrogens undiserable. According to most experts, a beneficial effect on human health prevail the potential risks. However, the risks associated with phytoestrogens intake in food can not be ignored and therefore phytoestrogens are still actual problem in the field of scientific research.
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