Sökning: "Supramolecular"

Visar resultat 21 - 25 av 80 avhandlingar innehållade ordet Supramolecular.

1. 21. Structural changes during cellulose composite processing

   Författare :Helena Halonen; Monica Ek; Tommy Iversen; Derek D. Gray; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; CP MAS 13C NMR; cellulose; fibril aggregation; biocomposite; compression moulding; supramolecular structure;

   Sammanfattning : Two approaches for creating a new all-cellulose composite material have been studied: the biosynthesis of compartmentalised bacterial cellulose fibril aggregates and the compression moulding of commercial chemical wood pulps processed with only water. The objective was to study the structural changes during processing and the complexity of relating the mechanical properties of the final biocomposites to the nanoscale structure was highlighted. LÄS MER

3. 22. Absolute Asymmetric Synthesis

   Författare :Anders Lennartson; Göteborgs universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; absolute asymmetric synthesis; enantioselective synthesis; chirality; optical resolution; spontaneous resolution; conglomerate; organozinc reagents; organometallic chemistry; coordination chemistry; supramolecular chemistry; intermolecular interactions; optical resolution;

   Sammanfattning : Absolute asymmetric synthesis is the synthesis of optically active products from achiral or racemic precursors only. This has generally been regarded as impossible and is relevant in the discussion of the origins of biomolecular homochirality. LÄS MER

4. 23. Exploring Molecular Interactions : Synthesis and Studies of Clip-Shaped Molecular Hosts

   Författare :Anjaneya Prasad Polavarapu; Helena Grennberg; Adolf Gogoll; Jerker Mårtensson; Uppsala universitet; []
   Nyckelord :Organic chemistry; Glycoluril clips; host-guest systems; supramolecular chemistry; complexation induced shifts; conformational restriction; NMR spectroscopy; fullerene binding; Organisk kemi;

   Sammanfattning : Molecular recognition via noncovalent interactions plays a key role in many biological processes such as antigen-antibody interactions, protein folding, the bonding and catalytic transformation of substrates by enzymes, etc. Amongst these noncovalent interactions, electrostatic interactions, hydrogen bonding, π-π interactions, and metal-to-ligand bonding are the most prominent. LÄS MER

5. 24. Stimuli-responsive lipid bilayer mimics for protein, virus and cell recognition

   Författare :Sing Yee Yeung; Malmö universitet; []
   Nyckelord :Lipid bilayers; Adaptable; Self-assembled; Monolayers; Supramolecular chemistry; Cell adhesion; Biocensor;

   Sammanfattning : The most well-studied two-dimensional biomimetic cellular membrane modelsare self-assembled monolayers (SAMs) and supported lipid bilayers (SLBs).The former has the advantage of control over ligand density, homogeneity andorientation, allowing unambiguous interaction studies. LÄS MER

7. 25. Electron and Energy Transfer in Supramolecular Complexes Designed for Artificial Photosynthesis

   Författare :Helena Berglund Baudin; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; artificial photosynthesis; electron transfer; energy transfer; ruthenium; manganese; Fysik; Physics; Fysik; Physical Chemistry; fysikalisk kemi;

   Sammanfattning : In the society of today the need for alternative energy sources is increasing. The construction of artificial devices for the conversion of sunlight into electricity or fuel seems very attractive from an environmental point of view, since these devices are based on processes that does not necessarily generate any harmful biproducts. LÄS MER