Sökning: "Activity generation"

Visar resultat 16 - 20 av 494 avhandlingar innehållade orden Activity generation.

1. 16. Effects of sex steroids and tamoxifen on matrix metalloproteinase activity and generation of endostatin in the breast

   Författare :Ulrika W. Nilsson; Charlotta Dabrosin; Lena Claesson-Welsh; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Angiogenesis; Breast cancer; TGF-β1; Endostatin; Estradiol; Mammary gland; Matrix metalloproteinases; MCF-7; Microdialysis; Nude mice; Tamoxifen; Oncology; Onkologi;

   Sammanfattning : Sex steroids are inevitable in women. However, long-term exposure to sex steroids increases the risk of breast cancer. A complete understanding of sex steroid control of the breast and how it relates to breast cancer risk is still lacking. LÄS MER

3. 17. Hydrogen Generation for Fuel Cells in Auxiliary Power Systems

   Författare :Marita Nilsson; Lars J. Pettersson; Gunther Kolb; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; autothermal reforming; auxiliary power unit; diesel; dimethyl ether; fuel cell; fuel-flexible reformer; hydrogen; PdZn alloy; reforming catalyst; reformer design; Rh; Chemical engineering; Kemiteknik;

   Sammanfattning : Heavy-duty trucks are in idle operation during long periods of time, providing the vehicles with electricity via the alternator at standstill. Idling trucks contribute to large amounts of emissions and high fuel consumption as a result of the low efficiency from fuel to electricity. LÄS MER

4. 18. Generation of Dopaminergic Neurons from Human Embryonic Stem Cells

   Författare :Tandis Vazin; Joakim Lundeberg; Ernest Arenas; KTH; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Human; dopaminergic; embryonic stem cells; differentiation; stromal cells; PA6 cells; dopamine; neurons; Neuroscience; Neurovetenskap; Neurobiology; Neurobiologi; Molecular neurobiology; Molekylär neurobiologi;

   Sammanfattning : Since the first successful derivation of human embryonic stem cells (hESC), rapid progress has been attained in the development of strategies in differentiation of these cells into various neural lineages, with the fundamental objective of using these cells for replacement and repair of damaged neuronal circuits in the central nervous system (CNS). Of particular interest are midbrain dopaminergic (mDA) neurons, which play a central role in regulation of voluntary movement. LÄS MER

5. 19. Mechanisms of rhythm generation in the lamprey locomotor network

   Författare :Lorenzo Cangiano; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Animals propel themselves through space, swimming, walking or flying, by rhythmic oscillatory movements of their body and limbs. In vertebrates these movements are mainly generated by specialized neuronal circuits in the spinal cord, called central pattern generators (CPGs) for locomotion. LÄS MER

7. 20. Internal Dosimetry Development and Evaluation of Methods and Models

   Författare :Lena M Jönsson; Lund Medicinsk strålningsfysik; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; tomografi; Klinisk fysiologi; medical instrumentation; tomography; radiology; Clinical physics; crypt cells; intestine; radionuclide; scintillation camera; sestamibi; activity quantification; conjugate view method; Monte Carlo simulation; internal dosimetry; Nuclear medicine; radiobiology; Nukleärmedicin; radiobiologi; medicinsk instrumentering; radiologi;

   Sammanfattning : Radionuclide therapy requires patient-specific planning of the absorbed dose to target volumes, in most cases tumours, in order to achieve an expected biological effect, taking into account that the absorbed doses to normal organs and tissues should be kept as low as reasonably achievable. Therefore, the calculation of absorbed doses has to be as accurate as possible. LÄS MER