Search for dissertations about: "H II regions"

Showing result 1 - 5 of 52 swedish dissertations containing the words H II regions.

2. 1. Neural correlates of skilled movement : functional mapping of the human brain with fMRI and PET

   Author : H Henrik Ehrsson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Brain; manual dexterity inter-limb coordination; kinesthesia; motor imagery;

   Abstract : Humans have unique abilities to perform certain types of skilled voluntary movements. In this thesis we examine the neural substrates of. (i) fine digit actions, in particular the control of fingertip forces during manipulation, and (ii) the coordination of voluntary movements of different limbs. READ MORE

4. 2. Regulation of HIV-1 provirus transcription

   Author : Mojgan H Naghavi; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Key words- HIV-1; LTR; transcription; subtypes; phylogenetic analysis; NFkappaB; USF; MCEF; HMG-1 DSP1; Dorsal.;

   Abstract : Transcription of the HIV-genome is regulated by the interaction of viral long terminal repeat (LTR) cis-acting sequences with a complex of viral regulatory proteins and cellular transcription factors. The complex interplay between the cellular-, and/or viral proteins and LTR of different subtypes may play a role in the control of HIV-1 latency versus activation. READ MORE

5. 3. Neuronal tracers for fine caliber spinal primary afferents and their response to peripheral nerve injury

   Author : H Fredrik Wang; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Rat; Primary afferents; Dorsal root ganglion; Peripheral nerve injury; Spinal cord; Isolectin GSA I-B4; Soybean agglutinin; Cholera toxin B subunit; Horseradish peroxidase; Immunohistochemistry; Neuronal tracing;

   Abstract : The isolectin B4 from Griffonia simplicifolia I (B4) and soybean agglutinin from the plant Glycine max (SBA), have been shown to bind to rat small-diameter dorsal root ganglion (DRG) neurons, and to fibers and presumed terminals in laminae I-II of the spinal cord dorsal horn. In the present thesis, these lectins and/or their horseradish peroxidase (HRP) conjugates, have been investigated in the rat with regard to their usefulness as selective neuronal markers of and axonally transported tracers for somatic and/or visceral spinal primary afferents with fine caliber, including unmyelinated, axons. READ MORE

6. 4. Boundary layer streaks as a novel laminar flow control method

   Author : Sohrab Sattarzadeh Shirvan; Jens H. M. Fransson; Edward B. White; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; boundary layer stability; laminar to turbulent transition; laminar flow control; drag reduction; Tollmien-Schlichting waves; oblique waves; streaky boundary layers; miniature vortex generators; discrete suction;

   Abstract : A novel laminar flow control based on generation of spanwise mean velocity gradients (SVG) in a flat plate boundary layer is investigated where disturbances of different types are introduced in the wall-bounded shear layer. The experimental investigations are aimed at; (i) generating stable and steady streamwise streaks in the boundary layer which set up spanwise gradients in the mean flow, and (ii) attenuating disturbance energy growth in the streaky boundary layers and hence delaying the onset of turbulence transition. READ MORE

7. 5. Simulations of Cosmic Reionization : Shapes & Sizes of H II regions around Galaxies and Quasars

   Author : Martina M. Friedrich; Garrelt Mellema; Jonathan Pritchard; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; astronomi;

   Abstract : After the era of recombination, roughly 360 000 years after the big bang (redshift 1100), the universe was neutral, continued to expand and eventually the first gravitationally collapsed structures capable of forming stars, formed. Observations show that approximately 1 billion years later (redshift 6), the Universe had become highly ionized. READ MORE