Sökning: "circadian rhythm"

Visar resultat 16 - 20 av 58 avhandlingar innehållade orden circadian rhythm.

  1. 16. Circadian rhythms and carbon acquisition in the red algae Kappaphycus alvarezii and Eucheuma denticulatum

    Författare :Malena Granbom; Matt Dring; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysiologisk botanik; Physiological Botany;

    Sammanfattning : Aspects of carbon and nitrogen metabolism have been studied in two closely related tropical red macroalgae (Rhodophyta) that belong to the commercially important genera Kappaphycus and Eucheuma. These algae are cultivated around the world for their carrageenan content. LÄS MER

  3. 17. Altered sleep/wake patterns and circadian rhythms : laboratory and field studies of sympathoadrenomedullary and related variables

    Författare :Torbjörn Åkerstedt; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Sammanfattning : Six studies on sleep/wake patterns and circadian rhythms were  carried out. In summary: (1) Adrenaline excretion, self-rated activation,  and body temperature rhythms persisted during sleep  deprivation, resisted adjustment to rotating shift work, but adjusted  rather well to permanent night work. LÄS MER

  4. 18. The size of synaptic boutons of an identified Drosophila motorneuron follows a circadian rhythm

    Författare :Kerstin Mehnert; Stockholms universitet; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  5. 19. Circadian rhythm dysfunction in the suprachiasmatic nucleus : effects of Trypanosoma brucei brucei infection and inflammatory cytokines

    Författare :Gabriella B Lundkvist; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Suprachiasmatic nucleus; slice; Trypanosoma brucei; sleeping sickness; spontaneous firing; rhytm; synaptic activity; GABA; glutamate; AMPA cytokines; sleep regulation; interferon-gamma; tumor necrosis factor-alpha;

    Sammanfattning : Alterations in the mammalian circadian pacemaker, the hypothalamic suprachiasmatic nuclei (SCN), were studied in an experimental rat model of African trypanosomiasis, or sleeping sickness, caused by infections with subspecies of Trypanosoma brucei (T b). Characteristic signs of the disease are marked disturbances in circadian rhythms, such as a fragmentation of the sleep-wake cycle. LÄS MER

  7. 20. Circadian plasticity in the neuromuscular junction of Drosophila melanogaster

    Författare :Kerstin Mehnert; Rafael Cantera; Charlotte Helfrich-Förster; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Neurobiology; Neurobiologi; funktionell morfologi; Functional Zoomorphology;

    Sammanfattning : A biological clock exists in many organisms and controls rhythmic behaviors such as the activity pattern of locomotion. At the cellular level, it has been shown that circadian rhythms in the morphology of neurons exist in the fruit fly Drosophila melanogaster. LÄS MER