Sökning: "covalent bonding"

Visar resultat 1 - 5 av 50 avhandlingar innehållade orden covalent bonding.

  1. 1. Understanding Atoms and Covalent Bonds. An exploration by Thomas-Fermi and one-electron theories

    Författare :William Eek; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; quantum ergodicity; delocalization; covalent bonding; atomic reactivity; Thomas-Fermi theory;

    Sammanfattning : .... LÄS MER

  3. 2. Coteaching chemical bonding with Upper secondary senior students : A way to refine teachers PCK

    Författare :Felix Schultze; Pernilla Nilsson; Zimmerman Nilsson Marie-Helene; Anna Vikström; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Coteaching; pedagogical content knowledge; pck; chemical bonding; representations; chemistry education; chemistry didactic;

    Sammanfattning : The aim of this study was to investigate how an experienced chemistry teacher gains and refines her pedagogical content knowledge (PCK) by cooperating with two grade 12 students (age 18) as coteachers while teaching chemical bonding in a grade 10 Upper secondary class. The study has been conducted from a sociocultural perspective, especially Vygotsky’s zone of proximal development (ZPD) (Vygotsky, 1978). LÄS MER

  4. 3. Studies on the Non-covalent Interactions (Stereoelectronics, Stacking and Hydrogen Bonding) in the Self-assembly of DNA and RNA

    Författare :Parag Acharya; Jyoti Chattopadhyaya; Frank Seela; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bioorganic chemistry; nucleic acids; NMR; Stereoelectronic effects; Hydrogen Bonding; Stacking; Bioorganisk kemi; Bioorganic chemistry; Bioorganisk kemi;

    Sammanfattning : This thesis is based on ten publications (Papers I-X). The phosphodiester backbone makes DNA or RNA to behave as polyelectrolyte, the pentose sugar gives the flexibility, and the aglycones promote the self-assembly or the ligand-binding process. LÄS MER

  5. 4. Probing molecular adsorbates with core level spectroscopies : Electronic structure and bonding models

    Författare :Alexander Föhlisch; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Fysik; Physics; Fysik; fysik; Physics;

    Sammanfattning : Resonantly excited X-ray emission spectroscopy has been applied to study the valence electronic structure of molecular adsorbates in an atom specific and orbital symmetry selective manner. In combination with ab initio cluster calculations, electronic structure and bonding models have been derived. LÄS MER

  7. 5. Bicyclo[3.3.1]nonanes as Scaffolds in Supramolecular Chemistry : From Host-Guest Systems to Hydrogen-Bonded Aggregates

    Författare :Anna Lidskog; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; supramolecular chemistry; host-guest system; non-covalent interactions; hydrogen bonding; aromatic interactions; electrostatic interactions; synthetic receptors; self-assembly; nanotubes;

    Sammanfattning : This thesis describes the use of bicyclo[3.3.1]nonane and its heteroanalogue 1,5- diazabicyclo[3.3. LÄS MER