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Nutritionally important components of fish muscle in the prevention of serious diseases
Mádl, David ; Bušová, Milena (advisor) ; Holcátová, Ivana (referee)
The topic of this bachelor thesis is the issue of nutritionally important components of fish muscle in the prevention of serious diseases. Fish meat is a rich source of essential amino acids, polyunsaturated fatty acids, minerals and vitamins, which has been shown to contribute to the improvement of human health. Omega-3 fatty acids reduce the risk of cardiovascular disease. In the practical part of the thesis, the consumer preferences regarding the consumption of fish snacks and consumer awareness of the importance of fish meat for health and disease prevention are investigated by means of a questionnaire survey. This work is of benefit not only to the professional community but also to consumers. Key words: fish meat; omega-3 fatty acids; dietary recommendations; fish contamination; fish consumption A
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Rybí maso jako rozšíření sortimentu pro výrobu masných výrobků
Nevrklová, Marie
Bachelor thesis Fish meat as an extension of the range for the production of meat products deals with fish production in the Czech Republic and abroad. It also includes general characteristics of fish, composition, benefits of fish meat and its importance in human diet. This is because fish meat is a rich source of protein, fat and vitamins necessary for the proper functioning of the human body. However, the bachelor thesis also deals with the possible risks associated with the consumption of fish meat, the occurrence of heavy metals, negatively affecting human health and the importance of hygiene and good processing practices. An important part of the bachelor thesis is the technological operations related to the processing of fish and fish meat. Likewise, fish meat products that are available on the market and accessible to the general population are included in the thesis.
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Způsoby marinování a nakládání ryb
Fichtnerová, Lenka
The bachelor thesis on the topic "Methods of marinating and pickling fish" deals with the characteristics of individual freshwater and marine fish species, which are the most used in the food industry, their nutritional value, and nutritional properties. The introductory part focuses on the description of specific fish species, the different components of fish meat and their impact on human health. Furthermore, special hygienic rules for handling fishery products were described, which are determined by both Czech legislation and European Union regulations. Subsequently, the various methods of fish processing that ensure the extension of the shelf life of fish meat are explained in detail. This is followed by a description of the various methods, including marinating, pickling, and preserving. Finally, the sub-processes are evaluated in terms of the processing requirements, the raw materials used and the shelf life of the products.
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Vliv suroviny a technologického postupu při výrobě rybích klobás
Klvaňová, Petra
This bachelors thesis follows up the effects of raw material and technological procedure in production of fish sausages. The sausages for the experiment were made of refrigerated or frozen muscles of the Carp (Cyprinus carpio). Then an organoleptic analysis was done, we evaluated these descriptors: overall look, the surface of the intestine, texture, appearence on the cut, scent, taste, salinity of the product and overall impression. Samples were put forward cooled (4 °C) and warmed (90 °C/15 minutes). The organoleptic analysis determined these results. The fish sausages made of refrigerated material and evaluated as cold had these most rated descriptors; scent and overal impression. On the other hand the fish sausages made of frozen material and evaluated cold, did not get positive score in any of descriptors. By analysing the fish sausages made of frozen material and evaluated cold, were the most rated decriptors; texture, appearance on the cut and taste. However, the fish sausages made of frozen material and evaluated warmed, were the most rated decriptors; overal look, the surface of the intestine and salitiny of the product. Based on the results we can say that the most suitable material for producing the fish sausages are frozen muscles. The technological procedure did not have any influence on the final product.
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The importance of fish in human nutrition and prevention of cardivascular diseases
Škrletová, Štěpánka ; Bušová, Milena (advisor) ; Kudlová, Eva (referee)
Fish are a perfect source of high quality proteins, vitamins and minerals which are also easily digestible. Sea fish contain considerable amount of Iodine and unsaturated omega-3 acids. Unfortunately, we in Czech Republic are substantially under average in fish meat consumption compared to EU. Consumption of fish meat can prevent the occurrence of cardiovascular disease and therefore there is a recommendation to regularly consumption fish meat thanks to their favourable influences. In theoretical part of this bachelor thesis is a comprehensive overview of the information about the importance of fish meat, description of its structure, utility, consumption and potential risks. Practical part is focused on research. For evaluation of the state of consumption and level of awareness was used survey. After the results were processed, it was found that 76 % of responders is consuming fish meat and 15% of responders is more likely not to consume it. It has also been found, that the responders are mostly informed about the nutritional values of fish meat. Key words: Fish meat, omega-3, consumption, KVO, nutrition
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Vliv krmení na senzorickou jakost kuřecího a rybího masa
Konečná, Kristýna
The topic of the thesis is The Influence of Feeding on the Sensory Quality of Chicken and Fish Meat. The work deals with the importance and the quality of chicken and fish meat and describes the effect of feeding on its sensory quality. It was observed the influence of fat contained in the feed to the chicken and fish meat quality. There were two basic types of feed in the chicken experiment. The control group of broilers was fed with a standard feed mixture and the experimental two groups with mixture with addition of 10% rapeseed oil. Subsequently sensory analysis assessed the differences between these groups, ROSS and COBB broilers and between slaughter parts (the chicken´s thighs and breasts). In the second practical meat of rainbow trout which came from five ponds was evaluated. Their feed differed mainly in the fat. In the sensory evaluation the sensory quality differences among the groups of ponds were assessed. The measured values were statistically processed cobwebby diagrams. The results showed the addition of rapeseed oil into the broiler feed had positive effect on the sensory quality to the ROSS chicken´s thighs and breasts. For the hybrid COBB there was no significant impact on the quality of chicken´s breasts or thighs muscle. The groups of rainbow trout were evaluated the best group fed by the mixture with the middle amount of the fat around 20 %.
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Kvalita a zpracování mořských ryb a mořských plodů
Zajíčková, Martina
This bachelor thesis on the topic Quality and processing methods of sea fish and sea food, describes complex characteristics of fish meat and partially also certain types of major sea food species and their processing methods. The first part is contributed to sea fish production and consumption in the Czech Republic as well as worldwide. Following by the second part, which describes the quality of fish and fish meat with the focus on its chemical composition. Thanks to this structure has fish meat great nutrition values and therefore also positive impact on human body. Next chapter is focused on serious illnesses connected with fish consumption. This bachelor thesis describes the overall fish processing from the killings to the final products. The last chapter is dedicated to the major sea food species, their processing and significance to the food industry.
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Vliv vykrvení na kvalitu masa kapra obecného (Cyprinus carpio)
KUBÍK, Michal
The aim of this study was to test the influence of bleeding on the flesh quality of common carp. For the assessment of the influence of bleeding on the colour, spectrophotometrical measuring was used. The sensory quality was evaluated to an ISO 8529 standard by a trained staff member of the Institute of Aquaculture and Protection of Water. Both raw and cooked samples were evaluated. Microbiological analysis was done according to ISO 4833 standard and lipid oxidation measured by TBARS. The influence of the bleeding was observed in all colour parameters (L*, a* and b*). The average of L* values was 43.7 +- 1; 42.7 +- 1, a 43 +- 0.9 in bled group and 37.51 +- 0.54; 37.98 +- 0.79; 37.42 +- 0.6 in unbled. The average of a* values was -1.4 +- 0.2; -1.6 +- 0.2; -0.9 +- 0.4 in the bled group and 4.5 +- 2.3; 3.6 +- 1.6; 7.4 +- 1 in the unbled group. A significant difference (p < 0.05) between groups was observed in all days of study in the L* and a* parameter. In the b* parameter there was a difference observed just in the first nine days. A significant difference (p < 0.05) between the bled and the unbled groups was observed in all criteria on the raw sample on the 1st and 3rd days. Cooked samples were significantly different (p < 0.05) just on the 6th day of study. Microbiological results came up to 4 +- 0.2 log CFU.g-1 in the bled group and 6.3 +- 0.1 log CFU.g-1 in the unbled group. The influence of bleeding was shown in lipid oxidation too. At the end of the study TBARS values were 17.8 +- 8.8 ug.kg-1 of the sample in the bled group and 39.9 +- 6.4 ug.kg-1 of the sample in the unbled group. In both groups, exponential growth was shown. The influence of bleeding was observed in all parameters. It can be stated that the bleeding has a positive influence on the flesh quality of common carp. In order to convert these results into practice, further studies to optimize the bleeding process are needed.
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Oxidative changes in selected types of meat
Havelková, Michaela ; Prokůpková, Ludmila (advisor) ; Vladimír, Vladimír (referee)
This diploma theses addresses the changes in the composition of animal lipids during cooling storage and after processing. It was used mincing fish muscle of common carp (Caprinus caprio). After application of selected herbs has been studied their antioxidation effect on the stability of fish lipids after heat - treatment and coooling storage. In total, two analyses were performed. Each analysis consisted of measuring temperature every two to three days for 20 - 23 days. During this period, the effect of oregano (Origanum vulgare), summer savory (Satureja hortensis L.) and greek oregano (Origanum heracleoticum L.) to heat-treated meat in cooling storage was observed with the help of the TBA value as an indicator of the oxidation level . Fish meat contains a high percentage of water and PUFA (polyunsaturated fatty acids) resulting in a higher level of lipid autooxidation. By applying the herbs into the samples, it is possible to slow down the lipid autooxidation and prolong the storage period. The antioxidative effect of herbs was present in all measuremnts. There were no statictically significant differences between greek oregano and summer savory. Statistically significant effects appear between saummer savory and greek oregano and between oregano and greek oregano. During the whole period of measuring TBA, its values were low. No difference between the samples with the herbs and the standart sample was statistically proven. However, cold storage of fish meat with the help of antioxidative effect of the herbs can be considered as an effective reduction of oxidation in the meat.
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Texturní vlastnosti rybího masa a produktů z ryb
Bytešníková, Zuzana
The bachelor thesis is based on texture property of fish meat and fish products. Chemical composition and structure of fish meat has principal influence on texture of fish. Texture is influenced by other influence as diet, genetics, technology of farming, autolytic process and handling. Fish products are changed during production by influence of low temperature during frozen storage, influence of high temperature during cooking or change of pH. Sensory and instrumental methods are used for evaluation of texture property. Sensory evaluation is expensive, time-consuming, samples need heat treatment and sensory panel of professional. On the other hand instrumental methods are quick, easy reproducible, cheap despite the high cost of instruments. Although sensory methods are replaced by instrumental methods. Sensory methods are still gold standard of evaluation of texture property.
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