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Studium složení palmového oleje z hlediska autenticity
Heinz, Petr
The palm oil is the most desirable raw material in a wide range of industry in the 21st century. It is a basic material for food, cosmetics, biodiesel and many other products. However, it’s production has a negative impact on the environment. In this thesis the palm oil authenticity is judged according to the differences in composition depending on the conditions of cultivation, which is related to the certification of this raw material. The fatty acid spectrum in the samples of palm oil was determined by method of gas chromatography coupled with flame ionization detection. In terms of total fatty acids content, the non-certified palm oil (fat sample 1) containing 0.969 g.g-1 fat (after three months storage 0.880 g.g-1 fat) is better than certified palm oil (fat sample 2) containing 0.648 g.g-1 fat (after three months storage 0.533 g.g-1 fat).
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Syřidla
Heinz, Petr
This work deals with rennet. The aim was to study all the available literature on the topic of rennet. History, composition of rennet, their distribution and production are described in this thesis. There are specified methods for evaluation of milk-clotting herein too. Cow's milk-clotting time was determined and quality of the resulting curd was evaluated. After that the yield of the resulting curd after one minute of dripping was evaluated. The milk used to determine of these parameters contained on average 3,67 % of fat, dry matter of these milk was 12,65 %, lactose 5,15 %, protein 3,15 %, pH 6,64, titratable acidity 6,93, calcium 1,05 g/l and the result of N-test was 1.
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