|
|
Changes of protein profile in barley during malting
Šopíková, Martina ; Mazanec,, Karel (referee) ; Bobáľová,, Janette (advisor)
This diploma thesis is focused on studies of changing of protein profile during barley malting. Substantial part of this work is devoted to the proteomics identification of barley proteins which change during malting and so become more stationary and they influence quality of beer (haze and foam in beer). For this experiment was used barley variety Jersey. In the theoretical part of this thesis there is information about beer, manufacturing of beer with description of important commodities for manufacturing of beer and information about barley malting and information about malting process. Next there is description of methods for separation of proteins (1D gel electrophoresis and 2D gel electrophoresis), MALDI TOF/TOF mass spectrometry and this use for the analysis and identification of proteins, the use of matrices and ways of the sample preparation. In the experimental part of this thesis there was carried out the optimisation of the dosage of sample for 1D gel electrophoresis and the optimisation of staining. The 15 % TRIS-HCl gel was the best, this gel was stained by Commassie Brilliant Blue G-250. For illustration of changes was made 2D gel electrophoresis. With help of method peptide mass fingerprinting and MS/MS protein of barley – protein Z, -amylase subtilisin inhibitor, -amylase a peroxidase were identificated. The analysis of barley extract intact proteins was carried out, this analysis was focused on changes of important barley protein LTP 1.
|
|
|
Dietary supplements in sport nutrition and possibilities of monitoring their effect on efficiency of sportsman.
Vlčková, Lenka ; Hrstka, Miroslav (referee) ; Vránová, Dana (advisor)
This work deals with dietary supplements intake and its impact on the performance rise and muscle mass growth of bodybuilders. Twenty-five students (bodybuilders) were chosen for the purpose of this survey; they were divided into four groups according to the dosage of creatine and other dietary supplements (proteins and maltodextrine). Changes of the measured parameters (weight; bustline; weistline; limb girth; body lipid content; creatine and urea content in the urine) were compared during the survey. The tested dietary supplements impact on the muscle mass growth was evaluated on the basis of the acquired results.
|
|
|
The Study of Biopolymers Stability Using Light Scattering Techniques
Kratochvíl, Zdeněk ; Sedláček, Petr (referee) ; Kalina, Michal (advisor)
The stability of chosen biopolymers (or simple carbohydrates and amino acids) was in-vestigated using light scattering methods. Samples were prepared by dissolving the sub-stance in deionised water or in diluted acetic acid. Firstly, the effect of increasing concen-tration on zeta potential was observed and the optimal concentration for the next measure-ments was determined. Afterwards, the stability and the molecular weight of used sub-stances were studied during long-time storage in different time intervals. It was found out that chitosan, CMC, hyaluronate and sodium alginate were subjected to degradation whereas increase of the molecular weight and the zeta potential was observed in case of BSA. In the end, the samples were exposed to several different external effects, namely the influence of different temperatures, UV radiation and increasing ionic strength. The results showed that rather higher temperature has a significant impact on biopolymers stability. However, used biopolymers were hardly affected by UV radiation except BSA whose molecular weight increased considerably. Decrease of the zeta potential absolute values and the molecular size usually occurred with increasing ionic strength. The change of molecular weight was not detected.
|
|
|
Degradation of biomaterials in model physiological conditions
Mikulíková, Zuzana ; Obruča, Stanislav (referee) ; Márová, Ivana (advisor)
The aim of presented work was to study degradation of selected modified protein materials and optimization of methods usable for protein concentration changes in samples that undergo proteolytic degradation. In first part overview of biomaterials used in medicine applications, biocompatibility and of collagen materials and their applications was given. In experimental part some methods for proteolysis determination were tested using standards of albumin, collagen and selected amino acids. As a part of this work proteolysis of selected modified collagen materials was observed. First, following methods for total protein analysis were tested: ninhydrin method, biuret method, Hartree-Lowry, UV-VIS spectrophotometry and TNBS method (trinitro-benzen-sulphonic acid). For collagen proteolysis determination two of these methods were optimized: biuret method (peptide group detection) and TNBS (primary amino group detection). These two methods were applied on enzyme degradation of three collagen samples: soluble collagen standard, collagen standard type I (insoluble) and modified collagen material for clinical application. In soluble and modified collagens collagenase effect exhibited decrease of peptide bounds and, simultaneously, increase of primary amino groups according to enzyme concentration and enzyme:substrate ratio. In insoluble collagen analysis was strongly influenced by structure and conformation changes of material during degradation.
|
|
|
Proteiny ve výživě člověka
Fialová, Lucie
This thesis describes the issues related to proteins in human nutrition. It deals with their specific functions in the human body, their structure and the recommended daily intake, and the consequences of either a deficiency or an excess of protein in human nutrition. For this thesis, the work focused on various food sources and their nutritional value, any positive or negative effects on human health, and their availability to consumers. Two different sources were used to determine the preferences and consumption of proteins from either animal or vegetable origins. Information was gathered from public sources, as well as a questionnaire that was given to randomly selected individuals.
|
|
|
Evaluation of germination effect on storage proteins profiles in seeds of selected legume species
MAREK, Josef
The aim of the diploma thesis was to assess changes in pattern of legume storage proteins during germination. Four species of legumes were chosen for analyses ? Glycine max L., Lupinus angustifolius L., Pisum sativum L. and Vicia faba L. Seeds for analyses were sampled at the beginning, middle and end of germination. Proteins were extracted from lyophilised and homogenised material. These proteins were analysed by SDS-PAGE electrophoresis. The results proved that during seed germination the seed storage proteins cleave into smaller peptides, which forms new proteins. The intensity of protein bands in pea seeds was decreased in the area at around 48-45 kda and 40-36 kDa and the intensity of the proteins bands was increased at around the protein bands 25-23 kDa and 19-7 kDa. In lupine were not detected the protein bands over 39 kDa and during germination amount of protein bands in areas 15-7 kDa was increased
|
|
| |
|
| |
|
| |
|
| |
guest ::
