Search for dissertations about: "Brain radiation"

Showing result 1 - 5 of 83 swedish dissertations containing the words Brain radiation.

  2. 1. Effects of Mobile Phone Radiation upon the Mammalian Brain

    Author : Henrietta Nittby; Sektion IV; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mobile phone; electromagnetic radiation; Blood-brain barrier; brain; rat;

    Abstract : oday about half of the world's population owns the microwave producing mobile phones. The blood-brain barrier (BBB) protects the mammalian brain from potentially harmful substances circulating in the blood. READ MORE

  4. 2. Ion escape from Mars : measurements in the present to understand the past

    Author : Robin Ramstad; Stas Barabash; Yoshifumi Futaana; David Brain; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mars; escape; solar wind; evolution; CME; coupling; plasma; atmosphere; Space Physics; rymdfysik;

    Abstract : Present-day Mars is a cold and dry planet with a thin CO2-dominated atmosphere comprising only a few ­­­mbar pressure at low altitudes. However, the Martian surface is marked with valley networks, hydrated mineral clays, carbonates and the remains of deltas and meandering rivers, i.e. READ MORE

  5. 3. Oxidized nucleotides as a predictor of radiation sensitivity

    Author : Ali Pour Khavari; Siamak Haghdoost; Marie Öhman; Anders Nilsson; Bo Stenerlöw; Neus Visa; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 8-oxo-dG; Radiation; Sensitivity; Oxidized; Nucleotides; ROS; NOS; molekylär biovetenskap; Molecular Bioscience;

    Abstract : The direct and indirect effects of IR can lead to DNA damage and activation of DNA repair. The indirect effects of ionizing radiation mediated by reactive oxygen species (ROS) which produced through radiolysis of water and if not taken care of by the antioxidant system, can also give rise to oxidative stress. READ MORE

  6. 4. Beyond Survival - Cognition after Pediatric Brain Tumor

    Author : Ingrid Tonning Olsson; Lund Pediatrik; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Pediatric Brain Tumor; Cognition; Late sequelae; Cranial Radiation Therapy; Neuropsychology;

    Abstract : Background: Pediatric Brain Tumor (PBT) survivors suffer from cognitive sequelae, especially within the areas of cognitive tempo, attention, executive function and memory. The cognitive difficulties are often accentuated over the years, but knowledge about the long term trajectory is still scarce. READ MORE

  7. 5. Cerebral arterial pulsatility imaging using 4D flow MRI : methodological development and applications in brain aging

    Author : Tomas Vikner; Anders Wåhlin; Anders Eklund; Jan Malm; Lars Nyberg; Susanne Schnell; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Magnetic resonance imaging; 4D flow MRI; medical image analysis; cerebral hemodynamics; arterial pulsatility; DCE MRI; blood-brain barrier; white matter lesions; perivascular spaces; cerebral small vessel disease; hippocampus; cognition; aging; biomedicinsk strålningsvetenskap; Biomedical Radiation Science;

    Abstract : 4D flow magnetic resonance imaging (MRI) is increasingly recognizedas a versatile tool to assess arterial and venous hemodynamics. Cerebral arterial pulsatility is typically assessed by analyzing flow waveforms over the cardiac cycle, where flow amplitude is a function of cardiac output, central arterial stiffness, and cerebrovascular resistance and compliance. READ MORE