|
|
Iris green
Menclová, Kateřina ; Hrdličková Kučková, Štěpánka (advisor) ; Crhová, Michaela (referee)
The goal of this thesis was to summarize available information about natural green organic dyes. This specific group of dyes is not too deep by itself; therefore other groups of natural dyes with a description of their chemical structures, natural resources and historical utilization, were also added. The work is aimed for preparation of organic dye that is called iridaceous green according to medieval recipes. This green dye was prepared from blue iris blows and than white linen was dyed by the plant extract. The dye together with the linen serve as a reference samples for future identification of natural organic dyes.
|
|
|
Gametogenesis and Fertilization in Humans
Crhová, Michaela ; Pavlasová, Lenka (advisor) ; Ehler, Edvard (referee)
This bachelor thesis summarises the topic of gametogenesis and fertilization in humans. A search in available literature was performed. The thesis concisely describes the cell cycle and cell division. The main focus is on meiosis, a reductional division that takes the lead part in sexual reproduction. The process of this division is described in detail, and also the mechanism that creates variability of protected cells is described. The product of meiosis is gametes, also known as germ cells. Production of these cells is a key moment in sexual reproduction. This thesis approaches this topic in the context of evolutionary biology and explains its importance in the survival of species on Earth. The main topic of the thesis is the production and maturing of human germ cells. This process is called gametogenesis. This thesis provides a cohesive description of the reproduction system of both sexes and describes the gradual maturing of the germ cells in gonads. The structure of both gametes, egg, and sperm is described with emphasis on the parts of these cells that take part in the process of fertilization. Female reproductive cycles are depicted, and their connection is explained. In contrast to this periodicity, the male continual maturing is also explained. This thesis compares the main differences in...
|
|
|
Iris green
Menclová, Kateřina ; Crhová, Michaela (referee) ; Hrdličková Kučková, Štěpánka (advisor)
The goal of this thesis was to summarize available information about natural green organic dyes. This specific group of dyes is not too deep by itself; therefore other groups of natural dyes with a description of their chemical structures, natural resources and historical utilization, were also added. The work is aimed for preparation of organic dye that is called iridaceous green according to medieval recipes. This green dye was prepared from blue iris blows and than white linen was dyed by the plant extract. The dye together with the linen serve as a reference samples for future identification of natural organic dyes.
|
|
| |
|
| |
guest ::
