Search for dissertations about: "Per-Erik Olsson"

Showing result 1 - 5 of 15 swedish dissertations containing the words Per-Erik Olsson.

  1. 1. Interaction of brominated flame retardants with the chicken and zebrafish androgen receptors

    Author : Solomon Asnake; Per-Erik Olsson; Dennis Larsson; Örebro universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; DBE-DBCH; TBP-AE; TBP-BAE; TBP-DBPE; gene transcription; Biology; Biologi;

    Abstract : The survival of organisms depends on their ability to use different signaling pathways to adapt to the environment. The endocrine system consists of glands that release hormones to the blood stream. Male reproductive functions are regulated by androgens through interactions with the androgen receptor (AR). READ MORE

  2. 2. Modulation of androgen receptor function by brominated flame retardants

    Author : Joubert Banjop Kharlyngdoh; Per-Erik Olsson; Peter Pärt; Örebro universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; DBE-DBCH; TBP-AE; TBP-BAE; TBP-DBPE; androgen receptor; endocrine disrupters; brominated flame retardant; Biology; Biologi;

    Abstract : .... READ MORE

  3. 3. Teleost reproduction: Aspects of Arctic char (Salvelinus alpinus) oocyte growth and maturation

    Author : Håkan Berg; Per-Erik Olsson; Birgitta Norberg; Umeå universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Zoophysiology; Salmonid; oocyte growth; vitellogenin; vitelline envelope protein; stress; cortisol; oocyte maturation; membrane receptor; Zoofysiologi; Animal physiology; Zoofysiologi; Zoophysiology; zoofysiologi;

    Abstract : In all vertebrate species, reproduction is a hormonally controlled process, important for growth and maturation of gonads and germ cells. Production of functional germ cells is of outmost importance to secure the survival of a species. Fish comprises 50% of the known vertebrates and are found in aquatic habitats all over the world. READ MORE

  4. 4. The Origin of Tetrapod Limbs and Girdles: Fossil and Developmental Evidence

    Author : Catherine Anne Boisvert; Per Erik Ahlberg; Rolf Ohlsson; Johan Ledin; Lennart Olsson; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Organism biology; Organismbiologi;

    Abstract : 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. READ MORE

  5. 5. Hitting the mark : studies of alterations in behaviour and fertility in ethinyl estradiol-exposed zebrafish and search related biomarkers

    Author : Nasim Reyhanian Caspillo; Inger Porsch Hällström; Per-Erik Olsson; Håkan Olsén; Leif Norrgren; Örebro universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Endocrine disrupting compounds; 17α-ethinylestradiol; fertility; anxiety; behaviour; zebrafish; biomarkers; stress; Biology; Biologi;

    Abstract : In this thesis, we have analysed the effects of EE2 on non-reproductive behaviours and fertility. We have showed that two doses of EE2 in male adult short-term exposures evokes opposite behaviours in the novel tank test. READ MORE