Essays about: "Diffusion NMR"

Showing result 1 - 5 of 11 essays containing the words Diffusion NMR.

  1. 1. Ion specific effects in polymer conformation

    University essay from KTH/Tillämpad fysikalisk kemi

    Author : Lovisa Svanholm; Anna Köttö; Samuel Deuda Lundkvist; [2021]
    Keywords : 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;

    Abstract : 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℃. READ MORE

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

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

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

    Abstract : 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). READ MORE

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

    University essay from KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Author : Helena Olsson; [2019]
    Keywords : 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;

    Abstract : 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. READ MORE

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

    University essay from Lunds universitet/Centrum för analys och syntes

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

    Abstract : 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. READ MORE

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

    University essay from Lunds universitet/Biofysikalisk kemi

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

    Abstract : 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. READ MORE