|
|
Mikrobiologická kvalita masa
Collinsová, Ria
This bachelor thesis deals with microbiological quality of meat. From a chemical point of view, meat and meat products have a high content of water and other substances that create the optimal environment for the growth and multiplication of undesirable microorganisms. In the case of imperfect handling and processing of the meat, contamination with microorganisms will occur and thus the sensory properties will change, and the spoilage will gradually increase. The development of microorganisms is also undesirable in terms of foodborne diseases, which can negatively affect the human body and affect it in the form of salmonellosis, campylobacteriosis, etc. The questionnaire survey revealed whether people are familiar with the notion of foodborne diseases and the potential risk that may arise with the consumption of meat and meat products. The survey shows that primary school children are more familiar with this potential risk compared to older people. A part of the thesis is a suggested recommendation to increase familiarity with this topic.
|
|
|
The efficiency testing of production commercial feeds for african catfish (Clarias gariepinus)
PETR, Miloš
In my diploma thesis I was tested six types of feed. I tested in 3 repetitions in the recirculating system with biological treatment of water. Tested fishes african catfish (Clarias gariepinus) weighted between 200 ? 800 g per piece, were deployed into 18 aquariums with volume of 190 litres per aquarium. The whole experiment took place in five partial 3-week periods in the intensive breeding of the laboratory - controlled reproduction of fishes FROV JCU. The average water temperature during the experiment was 27 °C. The main objective of the thesis was to observe production efficiency of tested types of feed, speed of the growth of fishes, feed rates and financial costs. Afterwards, determinativ of yield and organoleptic evaluation was determined, followed by laboratory examination of composition of meat. The results of production indicators (Specific Growth Rate, Relative Growth Rate, Food Conversation Ratio) were most favorable for 3 types of feed ? Haltáp (SGR=0,81 %; RGR=126 %; FCR=1,45), Coppens TROCO SUPREME-22 (SGR=0,73 %; RGR=105 %; FCR=1,19), Coppens TROCO PRIME-18 (SGR=0,68 %; RGR=97 %; FCR=1,26). The lowest costs for 1 kg of fish increment were achieved for these specific types of feed Haltáp and Aller Aqua Focus (45 Kč a 46 Kč). In the organoleptic analysis was found positive evaluation of meat of all tested fishes. Chemical composition of meat was (in term of proteins and fats content) most favorably documented for the hungarian feed called Haltáp (proteins=19,22 % and fats=4,85 %).
|
guest ::
