Sökning: "Erik Björn"

Visar resultat 16 - 20 av 60 avhandlingar innehållade orden Erik Björn.

  1. 16. Fast and reliable alignment and classification of biological macromolecules in electron microscopy images

    Författare :Björn Forsberg; Erik Lindahl; Sriram Subramaniam; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; cryo-EM; electron microscopy; GPU; parallel processing; protein structure; Biochemistry towards Bioinformatics; biokemi med inriktning mot bioinformatik;

    Sammanfattning : In the last century, immense progress has been made to charter and understand a wide range of biological phenomena. The origin of genetic inheritance was determined, showing that DNA holds genes that determine the architecture of proteins, utilized by the cell for most functions. LÄS MER

  3. 17. Spectral Mammography with X-Ray Optics and a Photon-Counting Detector

    Författare :Erik Fredenberg; Mats Danielsson; Björn Cederström; Jeffrey H. Siewerdsen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mammography; x-ray optics; photon counting; spectral shaping; spectral imaging; collimation; radiation dose; signal-to-noise ratio; quantum noise; anatomical noise; spatial resolution; x-ray flux; ; TECHNOLOGY; TEKNIKVETENSKAP; Engineering physics; Teknisk fysik; Optical physics; Optisk fysik; Other engineering physics; Övrig teknisk fysik; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik; Medical engineering; Medicinsk teknik; Radiological research; Radiologisk forskning;

    Sammanfattning : Early detection is vital to successfully treating breast cancer, and mammography screening is the most efficient and wide-spread method to reach this goal. Imaging low-contrast targets, while minimizing the radiation exposure to a large population is, however, a major challenge. LÄS MER

  4. 18. Two New Corneal Diseases Characterized by Recurrent Erosions

    Författare :Björn Hammar; Per Fagerholm; Erik Björck; Minna Vesaluoma; Linköpings universitet; []
    Nyckelord :Cornea; Corneal Dystrophy; Dystrophia Smolandiensis; Dystrophia Helsinglandica; Recurrent Erosions; MEDICINE; MEDICIN;

    Sammanfattning : Recurrent corneal erosions are a common complication of superficial corneal wounds. They most commonly arise following a trauma, in association with various corneal dystrophies, or are idiopathic. LÄS MER

  5. 19. Models for the Transfer of Drugs from the Nasal Cavity to the Central Nervous System

    Författare :Björn Jansson; Erik Björk; Sveinbjörn Gizurarson; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biopharmacy; Administration; intranasal; Nasal mucosa; Central nervous system; Olfactory bulb; Rat; Mouse; Swine; Cattle; Diffusion chambers; culture; In vitro; Biological models; Biological transport; Dextrans; Dopamine; Gels; Polysaccharides; Autoradiography; Fluorescence microscopy; Biofarmaci; Biopharmacy; Biofarmaci;

    Sammanfattning : The blood-brain barrier restricts the access of many compounds, including therapeutic agents, to the brain. Several human studies indicate that nasal administration of hydrophilic compounds, such as peptides, can bypass the blood-brain barrier. The aims of this thesis were to develop and refine models for this direct nose-to-brain transfer. LÄS MER

  7. 20. Theoretical studies of the coupling between electronic, vibrational, configurational and structural effects in metal borides

    Författare :Erik Johansson; Björn Alling; Johanna Rosén; Paul Erhart; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : This thesis addresses theoretical studies of the coupling between electronic, vibrational, configurational and structural degrees of freedom in metal borides. The effect of external conditions of temperature, pressure and composition on the interplay between internal degrees of freedom is investigated. LÄS MER