Thesis / Master of Science (MS)

The inspiration is the human body. It is a fascinating grouping of diverse types of tissues, thanks to specialized cells that form organs that perform various tasks in your body - perfect cooperation of individual groups - organs. Your authorities should be understood as "machines" that fulfill your responsibilities throughout the system. These machines are suitable for us and help us so that we can get on our side as well. Man changes, he looks for the environment and organs, and therefore parts of his bodies change with whom. Motivation is the search for articulation of individual processes, principles taking place in the human body. They perceive them that it is possible to observe all the principles taking place on a microscopic scale and to approach us on a scale - they will reduce man. All is intertwined.

No description available.

Biologists have taken the concept of organism largely for granted. However, advances in the study of chimerism, symbiosis, bacterial-eukaryote associations, and microbial behavior have prompted a redefinition of organisms as biological entities exhibiting low conflict and high cooperation among their parts. This expanded view identifies organisms in evolutionary time. However, the ecological processes, mechanisms, and traits that drive the formation of organisms remain poorly understood. Recognizing that organismality can be context dependent, we advocate elucidating the ecological contexts under which entities do or do not act as organisms. Here we develop a "contextual organismality" framework and provide examples of entities, such as honey bee colonies, tumors, and bacterial swarms, that can act as organisms under specific life history, resource, or other ecological circumstances. We suggest that context dependence may be a stepping stone to the development of increased organismal unification, as the most integrated biological entities generally show little context dependence. Recognizing that organismality is contextual can identify common patterns and testable hypotheses across different entities. The contextual organismality framework can illuminate timeless as well as pressing issues in biology, including topics as disparate as cancer emergence, genomic conflict, evolution of symbiosis, and the role of the microbiota in impacting host phenotype.

<p>The present study is concerned with the evolutionary relationships among the Euasterids II, a group of angiosperms that includes the orders Apiales, Aquifoliales, Asterales, and Dipsacales together with several small, poorly known families yet unplaced as to order.</p><p>Parsimony analysis of nucleotide sequence data from the chloroplast genes <i>atp</i>B, <i>ndh</i>F and <i>rbc</i>L together with morphological data are used to construct a phylogeny of the order Asterals, which in the present sense includes 11 families and more than 26 000 species. It is argued that Rousseaceae should be expanded to include also Carpodetaceae (and thus contain four genera), and that <i>Donatia</i> should be re-merged with Stylidiaceae. The present study also strongly supports that the sister taxon to the largest plant family, Asteraceae (Compositae), is the small South American Calyceraceae. A new addition to Asterales is <i>Platyspermation</i> (formerly in Escalloniaceae).</p><p>Using the recently developed Bayesian approach to phylogenetic reconstruction, in combination with a dataset consisting of the <i>atp</i>B, <i>ndh</i>F and <i>rbc</i>L nucleotide sequences, a resolved and fairly well supported phylogeny of the Euasterids II could be reconstructed. Based on this analysis, and furthermore supported by morphological characters, the South Hemispheric family Escalloniaceae is recircumscribed to include the monogeneric families Eremosynaceae, Tribelaceae and Polyosmaceae, and in this new circumscription it includes seven genera. The formerly escalloniacean member <i>Quintinia</i>, together with the monogeneric families Paracryphiaceae and Sphenostemonaceae, is argued to consitute a monophyletic family Paracryphiaceae <i>sensu lato</i>, supported by several morphological characters.</p>

The present study is concerned with the evolutionary relationships among the Euasterids II, a group of angiosperms that includes the orders Apiales, Aquifoliales, Asterales, and Dipsacales together with several small, poorly known families yet unplaced as to order. Parsimony analysis of nucleotide sequence data from the chloroplast genes atpB, ndhF and rbcL together with morphological data are used to construct a phylogeny of the order Asterals, which in the present sense includes 11 families and more than 26 000 species. It is argued that Rousseaceae should be expanded to include also Carpodetaceae (and thus contain four genera), and that Donatia should be re-merged with Stylidiaceae. The present study also strongly supports that the sister taxon to the largest plant family, Asteraceae (Compositae), is the small South American Calyceraceae. A new addition to Asterales is Platyspermation (formerly in Escalloniaceae). Using the recently developed Bayesian approach to phylogenetic reconstruction, in combination with a dataset consisting of the atpB, ndhF and rbcL nucleotide sequences, a resolved and fairly well supported phylogeny of the Euasterids II could be reconstructed. Based on this analysis, and furthermore supported by morphological characters, the South Hemispheric family Escalloniaceae is recircumscribed to include the monogeneric families Eremosynaceae, Tribelaceae and Polyosmaceae, and in this new circumscription it includes seven genera. The formerly escalloniacean member Quintinia, together with the monogeneric families Paracryphiaceae and Sphenostemonaceae, is argued to consitute a monophyletic family Paracryphiaceae sensu lato, supported by several morphological characters.

Gnathostomes, or jawed vertebrates, make up the overwhelming majority of modern vertebrate diversity. Among living vertebrates, they comprise the chondrichthyans (“cartilaginous fishes” such as sharks, skates, rays, chimaeras) and the osteichthyans (“bony fishes” or bony vertebrates, inclusive of tetrapods). Gnathostomes appear to have originated in the early Palaeozoic Era, but their early fossil record is fairly scant. The best fossils appear first in the Late Silurian and Devonian periods. Much of gnathostome diversity owes to unique adaptations in the internal skeleton of their head (the endocranium). The endocranium is composed of the braincase, jaws, hyoid arch, and branchial arches, which sometimes fossilise when they are composed of bone or calcified cartilage. The purpose of this thesis is to describe and compare the fossilised cranial endoskeletons of a variety of different Palaeozoic gnathostomes. The objective is to test current conceptions of gnathostome interrelationships (i.e. phylogeny) and infer aspects of key morphological transformations that took place during the evolution of Palaeozoic members of this group. Two key areas are examined: the morphology and interrelationships of Palaeozoic gnathostomes and the morphology of the visceral arches in sarcopterygian fishes. New data on the visceral arches are described from the stem tetrapods Panderichthys and rhizodontids. These provide insight into the sequence of character acquisition leading to the tetrapod middle ear. Panderichthys shows key features of the tetrapod middle ear chamber were established prior to the origin fo digited limbs. New morphological data are described from the “acanthodian” fish Ptomacanthus. Ptomacanthus provides only the second example of a well-preserved braincase from any member of this group. It shows dramatic differences from that of its counterpart, Acanthodes, providing new evidence for acanthodian paraphyly. New interpretations of basal gnathostome and osteichthyan phylogeny are presented, challenging or enriching existing views of these problems.

No description available.

New microscopy techniques are continuously developed, resulting in more rapid acquisition of large amounts of data. Manual analysis of such data is extremely time-consuming and many features are difficult to quantify without the aid of a computer. But with automated image analysis biologists can extract quantitative measurements and increases throughput significantly, which becomes particularly important in high-throughput screening (HTS). This thesis addresses automation of traditional analysis of cell data as well as automation of both image capture and analysis in zebrafish high-throughput screening.  It is common in microscopy images to stain the nuclei in the cells, and to label the DNA and proteins in different ways. Padlock-probing and proximity ligation are highly specific detection methods that  produce point-like signals within the cells. Accurate signal detection and segmentation is often a key step in analysis of these types of images. Cells in a sample will always show some degree of variation in DNA and protein expression and to quantify these variations each cell has to be analyzed individually. This thesis presents development and evaluation of single cell analysis on a range of different types of image data. In addition, we present a novel method for signal detection in three dimensions.  HTS systems often use a combination of microscopy and image analysis to analyze cell-based samples. However, many diseases and biological pathways can be better studied in whole animals, particularly those that involve organ systems and multi-cellular interactions. The zebrafish is a widely-used vertebrate model of human organ function and development. Our collaborators have developed a high-throughput platform for cellular-resolution in vivo chemical and genetic screens on zebrafish larvae. This thesis presents improvements to the system, including accurate positioning of the fish which incorporates methods for detecting regions of interest, making the system fully automatic. Furthermore, the thesis describes a novel high-throughput tomography system for screening live zebrafish in both fluorescence and bright field microscopy. This 3D imaging approach combined with automatic quantification of morphological changes enables previously intractable high-throughput screening of vertebrate model organisms.

Charles University in Prague Faculty of Pharmacy in Hradec Králové Department of Pharmaceutical Botany and Ecology Candidate: Bc. Pavlína Šramarová Diploma thesis supervisor: PharmDr. Jana Karlíčková, Ph.D. Title of thesis 2015/2016: Metabolism of isoflavonoids in human organism, pp. 54 Isoflavonoids are subgroup of flavonoids, belonging to the phytoestrogenic compounds. These compounds occur especially in leguminous, mainly in soya (Glycine max (L.) Merr). They have a positive impact on human health, especially for its estrogenic effects, due to which are applied in the fight against osteoporosis, cardiovascular diseases, atherosclerosis and for moderation of menopausal symptoms. Furthermore they exhibit antibacterial activity and protect cells against damage of DNA. This thesis deals with their metabolism and action in human and animal organism, also with the influence of intestinal microflora to transform these isoflavonoids into metabolites, as well as the effects of these metabolites. There are also mentioned these isoflavonoids: daidzein, genistein, biochanin A, formononetin, calycosin, prunetin, puerarin, cladrin, tectorigenin and kakkalid. Key words: isoflavonoids, metabolism, human organism