Sökning: "Björn Brunström"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Björn Brunström.

1. 1. Differentiation of Brain and Reproductive Organs in Birds : Effects of Environmental Contaminants

   Författare :Jeanette Axelsson; Björn Brunström; Björn Munro-Jenssen; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Zoophysiology; Bird; endocrine disruption; estrogen receptor; methoxychlor; UV-filter; sexual behavior; ovotestis; Zoofysiologi; Biology; Biologi;

   Sammanfattning : The first objective of this thesis was to investigate effects of endocrine disruptors on the developing brain and gonads of bird embryos. The substances studied were the insecticide methoxychlor, and nine UV-filters (3-benzylidene camphor (3BC), 4 methyl benzylidene camphor (4MBC), benzophenone (BP) 1,2 and 3, 4 hydroxy benzophenone (4 HB), 4 dihydroxy benzophenone (4DHB), benzyl salicylate (BS), and ethyl-4-aminobenzoate Et-PABA)), commonly used in cosmetic products. LÄS MER

3. 2. Chlorinated hydrocarbons injected into avian eggs : toxicity and influence on the embryonic metabolism

   Författare :Björn Brunström; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

   Sammanfattning : .... LÄS MER

4. 3. Gill EROD Activity in Fish : A Biomarker for Waterborne Ah-receptor Agonists

   Författare :Alexandra Abrahamson; Ingvar Brandt; Björn Brunström; Janneche Utne Skaare; Uppsala universitet; []
   Nyckelord :Biology; biomarker; fish; gill; CYP1A; EROD; environmental monitoring; induction; inhibition; PAH; PCB; produced water; Biologi;

   Sammanfattning : Induction of the cytochrome P450(CYP)1A protein and the connected increase in 7-ethoxyresorufin O-deethylase (EROD) activity are common biomarkers in fish. Enhanced activity of this protein signals exposure to Ah-receptor agonists such as chlorinated dioxins, co-planar polychlorinated biphenyls (PCBs) and certain polycyclic aromatic hydrocarbons (PAHs). LÄS MER

5. 4. Evaluation of Biomarker Responses in Fish : with Special Emphasis on Gill EROD Activity

   Författare :Carin Andersson; Jan Örberg; Björn Brunström; Lars Förlin; Uppsala universitet; []
   Nyckelord :Biology; three-spined stickleback; biomarker; EROD; ethynylestradiol; gill; vitellogenin; spiggin; CYP1A inducers; humic substances; sperm quality; biomonitoring; Biologi;

   Sammanfattning : Many chemicals present in the aquatic environment can interfere with physiological functions in fish. Exposure to chemicals can be revealed by the use of biomarkers. Induction of 7-ethoxyresorufin O-deethylase (EROD) activity is a commonly used biomarker for exposure to CYP1A inducers such as dioxins and polyaromatic hyrdrocarbons. LÄS MER

7. 5. Azoles and Contaminants in Treated Effluents Interact with CYP1 and CYP19 in Fish

   Författare :Kristina Beijer; Ingvar Brandt; Björn Brunström; Henner Hollert; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Azole; fungicide; chemical; CYP1A; CYP19; EROD; aromatase; effluent; STP; wastewater; fish; stickleback; rainbow trout; Biologi med inriktning mot ekotoxikologi; Biology with specialization in Environmental Toxicology;

   Sammanfattning : Numerous contaminants are present in mixtures in the aquatic environment. Among these are the azoles, a group of chemicals that includes both pharmaceuticals and pesticides. Azole fungicides are designed to inhibit lanosterol 14-demethylase (cytochrome P450 (CYP) 51), while other azoles are intended to inhibit aromatase (CYP19), i.e. LÄS MER