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Visar resultat 1 - 5 av 1312 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Developmental exposure to mixtures of environmental pollutants : Studies on metabolism, developmental processes, and reproductive organs in zebrafish and chicken embryos

   Författare :Anna Mentor; Maria Jönsson; Patrick Babin; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mixtures; Developmental toxicology; Endocrine disrupting chemicals; Metabolism; Feminization; Zebrafish; Chicken embryo; Biology with specialization in Environmental Toxicology; Biologi med inriktning mot miljötoxikologi; Biology with specialization in Environmental Toxicology; Biologi med inriktning mot miljötoxikologi; Biology with specialization in Environmental Toxicology; Biologi med inriktning mot miljötoxikologi; Biology with specialization in Environmental Toxicology; Biologi med inriktning mot miljötoxikologi;

   Sammanfattning : Humans and wildlife are continuously exposed to mixtures of environmental pollutants. Mixture toxicity can be challenging to predict due to interactions between chemicals and thus whole-mixture approaches are crucial in toxicology. LÄS MER

3. 2. Environmental pollutants and the reproductive system in birds : Developmental effects of estrogenic compounds

   Författare :Cecilia Berg; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Avian embryo; test system; xeno-estrogen; endocrine disruption; reproductive organ differentiation; oviduct; testis; Utvecklingsbiologi; Developmental biology; Utvecklingsbiologi; Ecotoxicology; ekotoxikologi;

   Sammanfattning : A number of environmental pollutants have been shown to mimick the action of the female sex hormone estrogen and are, therefore, suspected to be responsible for reproductive abnormalities seen in wildlife. Test systems which can be used in hazard and risk assessment of chemicals with estrogenic effects are consequently needed. LÄS MER

4. 3. Cellular transport and secretion of the cyanobacterial neurotoxin BMAA into milk and egg : Implications for developmental neurotoxicity

   Författare :Marie Andersson; Ingvar Brandt; Cynthia de Wit; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; BMAA; beta-N-methylamino-L-alanine; milk; secretion; amino acid transporter; autoradiography; metabolism; Biologi med inriktning mot ekotoxikologi; Biology with specialization in Environmental Toxicology;

   Sammanfattning : The cyanobacterial amino acid β-N-methylamino-L-alanine (BMAA) is a neurotoxin implicated in the etiology of neurodegenerative diseases. Cyanobacteria are cosmopolitan organisms present in various environments. LÄS MER

5. 4. Reactions to novelties : Developmental aspects

   Författare :Kerstin Andersson; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; Psykologi; Psychology; Psykologi; Psychology; psykologi;

   Sammanfattning : The present thesis considers different aspects of infants' and children's reactions to novelties, that is, unfamiliar persons, objects, and situations. In Study I, the developmental phenomenon stranger wariness was investigated from a temperamental perspective. LÄS MER

7. 5. New roles for apical secretion and extracellular matrix assembly in Drosophila epithelial morphogenesis

   Författare :Satish Arcot Jayaram; Christos Samakovlis; Catherine Rabouille; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Utvecklingsbiologi; utvecklingsbiologi; Developmental Biology;

   Sammanfattning : Branched tubular organs, such as the lung and vascular system fulfill the respiratory needs of most animals. Optimal tissue function relies on the uniform sizes and shapes of the constituting branches in each organ. LÄS MER