Sökning: "naturvetenskap biologi"
Visar resultat 6 - 10 av 5963 avhandlingar innehållade orden naturvetenskap biologi.
6. Artificial neural networks in models of specialization and sympatric speciation
Sammanfattning : This thesis deals with specialization and how it is linked to sympatric speciation. The trait driving specialization is a cue recognition trait modelled with artificial neural networks that exploiters use to discriminate beneficial resources from detrimental resources based on the signals of the resources. LÄS MER
7. Characterization and environmental influences on inflammatory and physiological responses
Sammanfattning : Pharmaceuticals are regularly released into the environment, in particular nonsteroidalanti-inflammatory drugs (NSAIDs) and antibiotics. The measuredconcentrations are relatively low and have therefore been considered to be harmless. LÄS MER
8. Androgen receptors and endocrine disrupting substances
Sammanfattning : Throughout the animal kingdom, organisms are dependent on substances such as steroid hormones to help them maintain internal balances. Examples of important tasks that are under regulation of steroid hormones are somatic and gonadal development, sexual performance and behavior (both social and sexual) as well as sex differentiation. LÄS MER
9. Molecular mechanisms involved in prokaryotic cycling of labile dissolved organic matter in the sea
Sammanfattning : Roughly half of the global primary production originates from microscopic phytoplankton in marine ecosystems, converting carbon dioxide into organic matter. This organic matter pool consists of a myriad of compounds that fuel heterotrophic bacterioplankton. LÄS MER
10. Reproductive physiology of the female three-spined stickleback, Gasterosteus aculeatus
Sammanfattning : Reproduction in vertebrates, including fishes, is under control of the brain-pituitary-gonad (BPG) axis. The female three-spined stickleback, Gasterosteus aculeatus, produces egg clutches at intervals of a few days and spawns them in a nest built by male. LÄS MER