Search for dissertations about: "P G Nilsson"

Showing result 1 - 5 of 9 swedish dissertations containing the words P G Nilsson.

2. 1. High-Resolution Measurement of the 4He(g,n) Reaction in the Giant Resonance Region

   Author : Björn Nilsson; Kärnfysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; tagged photons; photonuclear reactions; liquid helium; neutron detectors; liquid scintillators; giant resonances; angular distributions; differential cross sections; total cross sections; Nuclear physics; Kärnfysik; Fysicumarkivet A:2003:Nilsson;

   Abstract : A comprehensive near-threshold 4He(g,n) absolute cross section measurement has been performed at the high-resolution tagged-photon facility MAX-lab located in Lund, Sweden. The 20 < Eg < 45 MeV tagged photons (covering the Giant Dipole Resonance energy region) were directed towards a liquid 4He target, and knocked-out neutrons were detected in a pair of 60 cm x 60 cm vetoed NE213A liquid scintillator arrays. READ MORE

4. 2. Electronic, Transport, and Optical Properties of Broken-Gap Heterostructures

   Author : Karin Nilsson; Matematisk fysik; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; relaxation; magnetic resonance; supraconductors; magnetic and optical properties; k.p calculations; Condensed matter:electronic structure; electrical; interband transport; electron-hole hybridization; spin polarization; spectroscopy; spektroskopi; Kondenserade materiens egenskaper:elektronstruktur; egenskaper elektriska; magnetiska och optiska ; supraledare; magnetisk resonans;

   Abstract : This thesis examines the physical properties of broken-gap heterostructures using a multiband k.p model and self-consistent calculations. Broken-gap heterostructures, made from InAs, GaSb, and AlSb, are characterized by a special band alignment with an overlap between the InAs conduction band and the GaSb valence band. READ MORE

5. 3. Movement patterns and displacement of a soil insect

   Author : Elna Nilsson; Biologiska institutionen; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; attraction; repellence; fatty acid; Ecology; Ekologi; alarm; autoregressive model; autocorrelation; random walk; Protaphorura armata; Collembola; migration; dispersal; movement; displacement;

   Abstract : Movement and dispersal are important determinants of the spatial distribution and persistence of animal populations in a heterogeneous environment. I studied the small-scale movement pattern of a soil-living insect, Protaphorura armata (Collembola) by using a video-equipment. READ MORE

6. 4. Insulinogenic Effects of Milk- and Other Dietary Proteins, Mechanisms and metabolic implications

   Author : Mikael Nilsson; Avdelningen för livsmedel och läkemedel; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Näringslära; Nutrition; Type 2 diabetes; Isolated islets; Incretin hormones; Food proteins; Amino acids; Insulin index; Glycaemic index; Hyperinsulinaemia; Insulin; Blood glucose; Milk; Whey;

   Abstract : The metabolic syndrome (type 2 diabetes, obesity, hypertension, atherosclerotic cardiovascular disease, dyslipidaemia, and hyperinsulinaemia), is increasing in prevalence world-wide. The progression of this syndrome proceeds through a step-wise deterioration of metabolic events where deterioration of insulin sensitivity appears to have a key role in a ?vicious circle? of hyperinsulinaemia/hyperglycaemia and insulin resistance. READ MORE

7. 5. Somatostatin neurotransmission : studies on experimentally induced cognitive changes and Alzheimer’s disease

   Author : Lars Nilsson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Alzheimer s disease Adenylyl cyclase Autoradiography Behavior Cerebral cortex DemenbaEnvironment Ibotenic acid lesion In-situ hybridization Learning Neuropeptides Northern blot Nucleus basalismagnocellularis Posttranslational processing Rat Recepto;

   Abstract : Several neuropeptides are widely distributed in regions of the central nervous system (CNS) which are associated with cognitive functions. Multiple studies on postmortem Alzheimer's disease (AD) brains have shown depleted neuropeptide content and morphological abnormalities of somatostatin (SS)-containing interneurons in the hippocampus and the cerebral cortex. READ MORE