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DNA microextraction from plant vegetable matrix
Cesnak, Filip ; Španová, Alena (referee) ; Rittich, Bohuslav (advisor)
The aim of the thesis was the comparison of two DNA microextraction methods with the use of magnetic beads from food of plant origin. Samples had disparate and complex matrices and were either raw (broccoli) or processed (strawberry jam). The first method uses a magnetic separator for the manipulation of magnetic beads and was used as a standart for the comparison. The second method uses a paramagnetic needle, the advantage of which should be the possibility to isolate DNA of higher quality without a significant contamination by polyphenolic compounds or proteins. The former method was validated by statistic analysis of results obtained from both methods. DNA quality was judged by testing the amplificability of isolated DNA via PCR. The amplified products were visualised on an agarose gel with electrophoresis.
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Identification of probiotic bacteria in complex food matrices and dietary supplements
Cesnak, Filip ; Konečná, Jana (referee) ; Trachtová, Štěpánka (advisor)
Theoretical part of the thesis deals with the general characteristics of probiotic bacteria, their effect on human health and with technological demands imposed on them. Furthermore the thesis deals with actual methods of bacterial identification, especially on the base of polymerase chain reaction. Presence of the declared probiotic bacteria was analysed with the polymerase chain reaction (PCR) and the DNA was isolated from the sample of food additive with the use of magnetic particles.
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DNA microextraction from plant vegetable matrix
Cesnak, Filip ; Španová, Alena (referee) ; Rittich, Bohuslav (advisor)
The aim of the thesis was the comparison of two DNA microextraction methods with the use of magnetic beads from food of plant origin. Samples had disparate and complex matrices and were either raw (broccoli) or processed (strawberry jam). The first method uses a magnetic separator for the manipulation of magnetic beads and was used as a standart for the comparison. The second method uses a paramagnetic needle, the advantage of which should be the possibility to isolate DNA of higher quality without a significant contamination by polyphenolic compounds or proteins. The former method was validated by statistic analysis of results obtained from both methods. DNA quality was judged by testing the amplificability of isolated DNA via PCR. The amplified products were visualised on an agarose gel with electrophoresis.
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Identification of probiotic bacteria in complex food matrices and dietary supplements
Cesnak, Filip ; Konečná, Jana (referee) ; Trachtová, Štěpánka (advisor)
Theoretical part of the thesis deals with the general characteristics of probiotic bacteria, their effect on human health and with technological demands imposed on them. Furthermore the thesis deals with actual methods of bacterial identification, especially on the base of polymerase chain reaction. Presence of the declared probiotic bacteria was analysed with the polymerase chain reaction (PCR) and the DNA was isolated from the sample of food additive with the use of magnetic particles.
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