Sökning: "spontaneous resolution"

Visar resultat 1 - 5 av 44 avhandlingar innehållade orden spontaneous resolution.

  1. 1. Creating Optical Activity: Total Spontaneous Resolution and Viedma Ripening

    Författare :Per Martin Björemark; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical activity; absolute asymmetric synthesis; total spontaneous resolution; Viedma ripening; grinding; chirality; conglomerate; coordination compound; coordination polymer; single crystal X-ray diffraction; solvent free oxidation; nantioselective sulfide oxidation; solid state VCD;

    Sammanfattning : The creation of optical activity has been considered as something impossible even though reports of such creation via total spontaneous resolution since the 1940´s have been published. More recently Viedma ripening have been developed that also produce enantiopure bulk product. Both methods are examples of absolute asymmetric synthesis i.e. LÄS MER

  3. 2. Breaking the symmetry: creation and transfer of optical activity via total spontaneous resolution and stereoselective reactions

    Författare :Susanne Olsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; absolute asymmetric synthesis; enantioselective reactions; chirality; spontaneous resolution; conglomerate; organometallic chemistry; coordination compounds; attritionenhanced deracemisation; polymorphism; organolithium compounds; single-crystal X-ray crystallography;

    Sammanfattning : The generation of optical activity from achiral or racemic precursors – absolute asymmetric synthesis – is discussed in relation to the origin of biomolecular homochirality but is also often (incorrectly) regarded as being impossible. One approach to absolute asymmetric synthesis is the use of compounds that form chiral crystals. LÄS MER

  4. 3. 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

  5. 4. Longitudinal study of infants with high-grade vesicoureteral reflux

    Författare :Sofia Sjöström; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; vesico-ureteral reflux; congenital; infant; kidney function tests; renal insufficiency; urinary tract infections; bladder; urodynamics; spontaneous resolution; multivariate analyses;

    Sammanfattning : Background: Infants with congenital high-grade vesicoureteral reflux (VUR) have been regarded as a special group amongst children with reflux, with their own characteristics concerning renal damage, gender, resolution rate and causative mechanism. A dysfunctional bladder has been suggested to be associated with the condition. LÄS MER

  7. 5. Synthesis, Structure, Total Spontaneous Resolution, and Solid-State Reactions of Chiral Metal Complexes

    Författare :Anna Johansson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER