Sökning: "NATURAL SCIENCES Biology Organism biology Microbiology"
Visar resultat 21 - 25 av 31 avhandlingar innehållade orden NATURAL SCIENCES Biology Organism biology Microbiology.
21. The Origin of Tetrapod Limbs and Girdles: Fossil and Developmental Evidence
Sammanfattning : Around 375 million years ago, the first tetrapods appeared, marking one of the most important events in vertebrate evolutionary history. The fin to limb transition saw the appearance of fingers and a weight bearing pelvic girdle. LÄS MER
22. Proteostasis in Bacillus subtilis : chaperones and stress-response mechanisms
Sammanfattning : The maintenance of protein homeostasis, also referred to as proteostasis, is essential for preserving the structural and functional stability of the proteome in living organisms. This involves the precise control of protein synthesis, folding, and degradation. LÄS MER
23. Endocranial Morphology and Phylogeny of Palaeozoic Gnathostomes (Jawed Vertebrates)
Sammanfattning : 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). LÄS MER
24. Cardiovascular and hematological responses to voluntary apnea in humans
Sammanfattning : This thesis deals with cardiovascular and hematological responses to voluntary apnea in humans, with a special focus on O2 usage and storage. Humans, and many other air‐breathing animals, respond to apnea (breath holding) with a collection of interacting cardiovascular reflexes, which are collectively called the diving response. LÄS MER
25. Evolution of New Genes and Functions
Sammanfattning : To answer major evolutionary questions, we need a better understanding of the effects of mutations on specific functions and organism fitness. The aim of this thesis was to elucidate how new functions evolve and potential trade-offs with the original function. LÄS MER