Sökning: "Johan Holmberg"

Visar resultat 1 - 5 av 13 avhandlingar innehållade orden Johan Holmberg.

  1. 1. Galactic Structure Revealed by Space Astrometry

    Författare :Johan Holmberg; Astronomi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Astronomi; cosmic chemistry; Galactic structure; Milky Way Galaxy; Galactic kinematics and dynamics; Galactic chemical evolution; moving groups; solar neighbourhood; dark matter; astrometry; Hipparcos; space research; Astronomy; rymdvetenskap; kosmisk kemi; Space technology; Rymdteknik; Fysicumarkivet A:2001:Holmberg;

    Sammanfattning : This work demonstrates how the structure of our Galaxy, the Milky Way, can be unveiled with the use of space astrometry. It consists of two parts, of which the first is a brief introduction to the fields of Galactic structure, covering the Galaxy's stellar constituents, how the Galaxy was formed and how it has evolved over time, both chemically and kinematically. LÄS MER

  2. 2. Ephrins off the beaten path

    Författare :Johan Holmberg; Karolinska Institutet; Karolinska Institutet; []

    Sammanfattning : The Orchestration of cell-cell interactions is crucial to the developing embryo and the adult organism. Intercellular communication is to a large extent controlled by signalling events downstream of receptor tyrosine kinases (RTKs). Ligands for RTKs are often soluble and confer long distance information to the receptor expressing cell. LÄS MER

  3. 3. A Study of Propane and Propene Ammoxidation over the Mo-V-Nb-Te-Oxide System

    Författare :Johan Holmberg; Institutionen för kemiteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemiteknik och kemisk teknologi; TEM; TPR; XPS; XRD; XANES; Chemical technology and engineering; SEM; FTIR; BET; TiO2; SiO2; Al2O3; supports; substitution; synthesis; Mo-V-Nb-Te-Ox catalysts; acrylonitrile; propene; Ammoxidation; propane; symbiosis;

    Sammanfattning : The ammoxidation of propane is commonly regarded as being the future route for producing acrylonitrile, and the Mo-V-Nb-Te-oxide system studied here has thus far been seen as the most promising candidate for achieving this. Yields of up to 62% have been presented very elegantly in the patent literature. LÄS MER

  4. 4. Dizziness and fear of falling: A behavioural and physiological approach to Phobic Postural Vertigo

    Författare :Johan Holmberg; Lund näs- och halssjukdomar Öron-; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; klinisk psykologi; psykosomatik; Psychiatry; audiologi; Otorinolaryngologi; audiology; Otorhinolaryngology; clinical; patients; exposure; behaviour; cognitive; psychological; psychotherapy; proprioceptive; postural control; Anxiety; Psykiatri; clinical psychology; hörsel- och talorganen; auditive system and speech; psychosomatics;

    Sammanfattning : Dizziness is a common problem and it often co-exists with anxiety. Level of anxiety is the best predictor of handicap for dizzy patients. There is diagnostic controversy and few treatment programs for such patients. LÄS MER

  5. 5. Gain-of-function induced defects by PITX2 in eye and limb development

    Författare :Johan K Holmberg; Muskelbiologi; []

    Sammanfattning : My research has been focused on eye and limb development with regard to the transcription factor PITX2. In the first paper we present an Axenfeld-Rieger syndrome PITX2 gain-of-function eye mouse model. Axenfeld-Rieger syndrome is a rare autosomal disorder affecting the development of eyes, teeth and abdomen. LÄS MER