Sökning: "Human exposure"

Visar resultat 16 - 20 av 1023 avhandlingar innehållade orden Human exposure.

1. 16. Mercury exposure during early human development

   Författare :Karolin Ask Björnberg; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Methylinmercury; inorganic mercury; selenium; human; fetal exposure; infant exposure; pregnancy; placenta; breast milk; fish consumption; dietary advisories;

   Sammanfattning : People are exposed to methylimercury (MeHg) mainly via consumption of fish, especially large predatory fish species. Inhaled mercury vapour (Hg0) released from dental amalgam fillings is the main source of exposure to inorganic mercury (I-Hg). In the body, a small fraction of MeHg is demethylated to inorganic He while most Hg0 is oxidized to Hg2+. LÄS MER

3. 17. Fear, Startle, and Fear-Potentiated Startle : Probing Emotion in the Human Brain

   Författare :Anna Pissiota; Mats Fredrikson; Scott Rauch; Uppsala universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Psychology; anxiety; attention; brain; fear; fear-potentiated startle; human; neuroimaging; positron emission tomography; posttraumatic stress disorder; regional cerebral blood flow; startle; startle habituation; symptom provocation; Psykologi; Psychology; Psykologi; Psychology; psykologi;

   Sammanfattning : The present thesis explored the neurobiological basis of three aspects of defense behaviors in humans. Positron emission tomography methodology was used, and changes in regional cerebral blood flow (rCBF) were measured as an index of neural activity. LÄS MER

4. 18. Human response to wind turbine noise : perception, annoyance and moderating factors

   Författare :Eja Pedersen; Sten Ljunggren; Högskolan i Halmstad; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Noise; Environmental exposure; Wind; Audio-visual interaction; Low-level noise exposure; NATURAL SCIENCES; NATURVETENSKAP; wind turbines; noise annoyance; sound perception; audio-visual interaction; low-level noise exposure;

   Sammanfattning : Aims: The aims of this thesis were to describe and gain an understanding of how people who live in the vicinity of wind turbines are affected by wind turbine noise, and how individual, situational and visual factors, as well as sound properties, moderate the response.Methods: A cross-sectional study was carried out in a flat, mainly rural area in Sweden, with the objective to estimate the prevalence of noise annoyance and to examine the dose-response relationship between A-weighted sound pressure levels (SPLs) and perception of and annoyance with wind turbine noise. LÄS MER

5. 19. Supporting Patients and Therapists in Virtual Reality Exposure Therapy

   Författare :Marius Koller; Cristian M Bogdan; Gerrit Meixner; Chiara Rossitto; Anders Lundström; Willem-Paul Brinkman; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Human-computer Interaction; Människa-datorinteraktion;

   Sammanfattning :  This thesis explores challenges for the design of Virtual Reality Exposure Therapy (VRET) systems. Exposure therapy is the established method for treatment of anxiety disorders and is typically delivered in-vivo, i.e. exposure to phobic stimulus in real environments. LÄS MER

7. 20. Levels of brominated flame retardants in humans and their environment : occupational and home exposure

   Författare :Marie Karlsson; Bert van Bavel; Bo Strandberg; Örebro universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; PBDE; BTBPE; DeBDethane; plasma; air; dust; Northern fulmar; egg; household; occupational exposure; Chemistry; Kemi; Kemi; Chemistry;

   Sammanfattning : Plasma from workers at an electronic dismantling plant were analysed for tri- to heptaBDEs (brominated diphenyl ethers), during 18 months. The different exposed groups showed concentrations ranging from 0.06to 2.8 ng g-1 (l. LÄS MER