Sökning: "Fertilization"

Visar resultat 16 - 20 av 196 avhandlingar innehållade ordet Fertilization.

  1. 16. Effects of fertilization on forest flora and vegetation

    Författare :Olle Kellner; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP;

    Sammanfattning : .... LÄS MER

  3. 17. In vitro fertilization : emotional reactions to treatment, pregnancy and parenthood

    Författare :Anna Hjelmstedt; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :in vitro fertilization; infertility distress; pregnancy; parenthood; personality traits; anxiety; marital relationship;

    Sammanfattning : The overall aim of this thesis was to study the emotional reactions of women and men entering in vitro fertilization (IVF) treatment and to study the emotional reactions during pregnancy and postpartum in couples who have achieved a pregnancy following IVF. Ninety-one couples seeking IVF treatment were investigated regarding gender differences in stress related to infertility. LÄS MER

  4. 18. Women's experience of pain and pain relief in assisted reproductive technology

    Författare :Ann-Louise Gejervall; Göteborgs universitet; []
    Nyckelord :oocyte retrieval; pain relief; randomized controlled trial; pain; fertilization rate; embryo development; Visual Analogue Scale;

    Sammanfattning : The overall aim of this thesis was to evaluate and compare different methods for pain relief during oocyte retrieval and to study women’s expectations and experiences of pain during oocyte retrieval in conjunction with in vitro fertilization. Paper I, an open prospective randomized controlled trial, including 160 women had the primary aims of comparing the pain relieving effects of electro-acupuncture and conventional analgesia, comprising opiates, in conjunction with oocyte retrieval, and to compare post-operative well-being between groups. LÄS MER

  5. 19. Top-down and bottom-up effects in a Fennoscandian tundra community

    Författare :Doris Grellmann; Lars Ericson; Lauri Oksanen; Richard Inouye; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; consumer-resource interactions; exclosures; food web dynamics; grey-sided voles; lemmings; NPK-fertilization; plant defences; reindeer; soil microbes; vertebrate grazing;

    Sammanfattning : The objective of this thesis was to investigate the effects of mammalian grazers, such as microtine rodents and reindeer, (top-down effects) and nutrient availability (bottom- up effects) on the plant community of a tundra heath.I conducted a large-scale fertilization experiment and studied the impact of grazers using exclosures. LÄS MER

  7. 20. The Nitrogen Cycle in Soil - Climate Impact and Methodological Challenges in Natural Ecosystems

    Författare :Anna-Karin Björsne; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Nitrogen cycle; 15N tracing experiments; gross N transformation rates; climate change; climate treatments; mineralization; nitrification; forest fertilization; nitrous oxide emissions; boreal forest soil; tree species; soil organic matter; C:N ratio;

    Sammanfattning : Nitrogen (N) is a fundamental element for life, and limiting in many terrestrial ecosystems. In non-N-fertilized ecosystems, the N inputs can be low, and the nutrient availability for plants is determined by the internal cycling of N. LÄS MER