Sökning: "solvent"

Visar resultat 1 - 5 av 301 uppsatser innehållade ordet solvent.

  1. 1. Nya metoder för fernissaborttagning – En komparativ studie

    Kandidat-uppsats, Göteborgs universitet/Institutionen för kulturvård

    Författare :Alica Larsson; [2023-11-08]
    Nyckelord :Oil painting; Varnish removal; Evolon® CR; Tissue-gel composite;

    Sammanfattning : In recent years, new varnish removal methods have emerged in conservation, with two notable approaches: the tissue-gel composite method, involving gel-coated tissue material pressed onto varnished surfaces for simultaneous dissolution and binding, and the use of Evolon® CR textile saturated with solvent. Evolon® CR offers an alternative to gels and tissue-gel composites, aiming to eliminate residue from gel thickening agents and the need for mechanical cleaning, while enabling the use of non-polar solvents in a bound form. LÄS MER

  2. 2. BORTTAGNING AV TRYCKKÄNSLIG TEJP PÅ PAPPER En studie över användningen av hydrogeler

    Kandidat-uppsats, Göteborgs universitet/Institutionen för kulturvård

    Författare :Amanda Nyagake Mwita; [2023-11-07]
    Nyckelord :Pressure-sensitive tape; agar-gel; hydrogel; nanogel; paper conservation;

    Sammanfattning : The purpose of this thesis is to examine hydrogels practical efficiency in the removal of pressure-sensitive tapes on paper. The organic agar gel and synthetically produced Nanorestore Gel® PG5 Peggy Gel and Nanorestore Gel® High Water Retention are used in an experimental process upon removing three common pressure-sensitive tapes (PTSs) on paper. LÄS MER

  3. 3. Bläckborttagning från ben med hjälp av geler En kvantitativ studie för bläckborttagning på björnbäcken och björnkranium från Naturhistoriska riksmuseet

    Kandidat-uppsats, Göteborgs universitet/Institutionen för kulturvård

    Författare :Engla Nordin; [2023-11-07]
    Nyckelord :Conservation; reversibility; bones; FTIR; nanogels; hydrogels; ink.;

    Sammanfattning : This bachelor's thesis has investigated four different hydrogels loaded in different solvents efficiency to remove unknown ink from four pelvic bones and one skull from five bear individuals that belongs to The Swedish Museum of Natural History. The experimental part of the thesis consists of an FTIR analysis together with microscopy and macroscopy analysis of the ink on the bear skeletons, as well as some tests of different gel-solvent combinations on a moose skull. LÄS MER

  4. 4. Transient state UV spectroscopy of Tyrosine and Tyrosine-containing protein

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Hongjian Chen; [2023]
    Nyckelord :Tyrosine; Calmodulin; Autofluorescence; Transient-state monitoring; Electronic state transitions; Tyrosin; Calmodulin; Autofluorescens; Transient-tillståndsövervakning; Elektroniska tillståndsövergångar;

    Sammanfattning : The aromatic amino acids tryptophan, tyrosine, and phenylalanine have been extensively used for different label-free protein studies. These investigations extract information on protein conformations and interactions from the emitted fluorescence's intensity, wavelength, and/or polarization. LÄS MER

  5. 5. Creating a High-Throughput Workflow for Automated Peptide Characterization using LC-MS

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Sara Forsberg; [2023]
    Nyckelord :High-throughput analysis; Impurity profiling; UHPLC-HRMS; Peptide characterization; Peptide descriptors; Analytical chemistry; Technology and Engineering;

    Sammanfattning : In the early stage of a drug discovery project, there is a need for efficient methods that can analyse peptides in short time. This includes methods that confirm the peptide’s identity and estimates its relative purity in an efficient and reliable way. LÄS MER