Sökning: "diffusion NMR"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden diffusion NMR.

  1. 1. Ion specific effects in polymer conformation

    Kandidat-uppsats, KTH/Tillämpad fysikalisk kemi

    Författare :Lovisa Svanholm; Anna Köttö; Samuel Deuda Lundkvist; [2021]
    Nyckelord :Poly N-isopropylacrylamid ; PNIPAM; pre-transitional chain collapse; ion specific effects; Hoffmeister series; LCST; diffusion NMR; self-diffusion NMR; fractionation; kosmotropes; chaotropes; inversion recovery experiment;

    Sammanfattning : It is well known that ions affect polymers in specific ways not solely based on electric charge, usually referred to as the Hoffmeister effect or ion specific effects. Poly(N-isopropylacrylamid) (PNIPAM) is a thermosensitive polymer with a LCST at 32℃. LÄS MER

  3. 2. Characterizing the pore structure of porous matrices using SEQ-NMR spectroscopy

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Ella Strömberg; [2020]
    Nyckelord :SEQ-NMR; diffusion NMR; resins; porous materials; pore structure; pore size characterization; diffusion NMR simulations;

    Sammanfattning : Characterization of the pore structure is a crucial part in themanufacturing of porous media used for purification of biologicalpharmaceuticals. This project took place at Cytiva in Uppsala and aimedat optimizing a newly developed method in pore structurecharacterization called size-exclusion quantification NMR (SEQ-NMR). LÄS MER

  4. 3. Making wood durable. A sustainable approachwith linseed oil

    Uppsats för yrkesexamina på avancerad nivå, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Helena Olsson; [2019]
    Nyckelord :Linseed oil; Wood preservation; Nuclear Magnetic Resonance NMR ; Diffusion Ordered Spectroscopy DOSY ; Time-resolved oxidation study; Linolja; Bevarande träbehandling; Nuclear Magnetic Resonance NMR ; Diffusion Ordered Spectroscopy DOSY ; Oxidationstidsstudie;

    Sammanfattning : Linseed oil has been and is used for vast number of applications, such as in food and paint industry, and wood preservation. It is a good environmental choice, as it originates from renewable sources. Linseed oil is mainly a mixture of triglyceride of fatty acids, both saturated and mono- or polyunsaturated, which allows the oil to oxidize. LÄS MER

  5. 4. Dissolution and fibre spinning of cellulose from an ionic liquid

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

    Författare :Erika Andersson; [2018]
    Nyckelord :Cellulose; scattering; ionic liquid; dissolution; regenerated cellulose fibre; structure-property relationship; materials chemistry; materialkemi; Chemistry; Technology and Engineering;

    Sammanfattning : Regenerated cellulose fibres can become a sustainable alternative to cotton and polyester in textile applications. One method of producing such is dissolution of cellulose in an ionic liquid (IL) and regeneration through air-gap spinning. LÄS MER

  7. 5. Orientation of Sticks and Spheres - Estimating Tensor Shape and Orientation Distribution using Diffusion NMR

    Master-uppsats, Lunds universitet/Biofysikalisk kemi

    Författare :Mikael Leveau Novén; [2015]
    Nyckelord :Diffusion NMR; ODF; NMR; Diffusion; biophysical chemistry; biofysikalisk kemi; Chemistry; Technology and Engineering;

    Sammanfattning : The diffusion characteristics of water can be measured by using NMR methods. Specifically, the diffusion profiles in samples containing domains of water barriers are of major importance to be able to describe in applications such as diffusion tensor imaging or diffusion MRI-sequences. LÄS MER