Sökning: "circadian rhythm"

Visar resultat 1 - 5 av 56 avhandlingar innehållade orden circadian rhythm.

  1. 1. The rhythm of adolescence : morningness-eveningness and adjustment from a developmental perspective

    Författare :Anna-Karin Andersson [Andershed]; Margaret Kerr; Mats Gillberg; Örebro universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; morningness-Eveningness; circadian rhytmicity; sleep-wake; adolescence; development; social adjustment; school adjustment; family relations; risk; delinquency; impulsiveness; sensation-seeking; Psychology; Psykologi; Psykologi; Psychology;

    Sammanfattning : In recent developmental research, sleep-wake patterns and preferences, in other words Morningness-Eveningness, have been shown to be related to various kinds of problem behavior. Previous research on adolescents has demonstrated that individuals with a sleep-wake preference toward staying up late in the evening and arising late in the morning (i.e. LÄS MER

  2. 2. Circadian Rhythms in Moth Sex Pheromone Communication

    Författare :Germund von Wowern; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Physiology of invertebrates; växtparasitologi; Entomologi; plant parasitology; Entomology; Ecology; Ekologi; locomotor activity; social synchronisation; PDH; corazonin; PBAN; pheromone response; sex phermone; Lepidoptera; Ryggradslösa djurs fysiologi; calling behaviour; circadian rhythm;

    Sammanfattning : Sex pheromone communication and related physiological processes are regulated by circadian clock mechanisms in many moth species. This thesis includes studies of circadian rhythms in sexually relevant behaviours and communication in the Egyptian cotton leafworm Spodoptera littoralis, the turnip moth Agrotis segetum, the Indian meal moth Plodia interpunctella and the Mediterranean flour moth Ephestia kuehniella. LÄS MER

  3. 3. Interference with biological rhythm : a novel approach to metabolic disorders in women

    Författare :Roger Karlsson; Umeå universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Growth hormone; GH; cholecystokinin; CCK; osteocalcin; angiotensinogen; diurnal variation; oral contraception; pregnancy; menopause;

    Sammanfattning : Women seem to be largely protected against certain ‘welfare disorders’ such as cardiovacular disease and osteoporosis, during their fertile years.The metabolic changes observed during women’s non-menstrual states, i.e. LÄS MER

  4. 4. Studies on Natural Variation and Evolution of Photoperiodism in Plants

    Författare :Karl Holm; Ulf Lagercrantz; Martin Lascoux; Seth Jon Davis; Uppsala universitet; []
    Nyckelord :photoperiodism; circadian; flowering time; natural variation; evolution; Caspella bursa-pastoris; Physcomitrella patens; Biologi med inriktning mot evolutionär funktionsgenomik; Biology with specialization in Evolutionary Functional Genomics;

    Sammanfattning : Photoperiodism refers to the organism’s ability to detect and respond to seasonal changes in the daily duration of light and dark and thus constitutes one of the most significant and complex examples of the interaction between the organism and its environment. This thesis attempts to describe the prevalence of variation in a photoperiodic response, its adaptive value, and its putative genetic basis in a common cruciferous weed, Capsella bursa-pastoris (Brassicaceae). LÄS MER

  5. 5. Biological Rhythms of Pancreatic Secretion in Young Pigs with empahasis to the time around weaning

    Författare :Mary-Jane Sebabatso Thaela; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Volume; Ultradian; Protein; Pancreas; Pig; IRCT; Insulin; Infradian; Glucose; Circadian; Chymotrypsin; Biologic week and Half-week; Chronome; Animal physiology; Djurfysiologi;

    Sammanfattning : When the time structure (chronome) of pancreatic secretion was studied after weaning in 5-week-old pigs, the zero-amplitude (no-rhythm) assumption was rejected for the about-weekly (circaseptan, CS) and about-half-weekly (circasemiseptan, CSS) chronome components. When the data were assessed individually on a day-to-day basis, a 24-hour component was suggested (P. LÄS MER