Sökning: "Perfluorocarbon"

Visar resultat 1 - 5 av 11 uppsatser innehållade ordet Perfluorocarbon.

  1. 1. Acoustic Characterization of the Cellulose-coated Perfluorocarbon Droplets based on Phase Velocity Measurements

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Emma Lindroth; [2020]
    Nyckelord :Ultrasound; Droplets; Contrast agent; Cellulose; Perfluorocarbon; Acoustic characterization; Non-destructive evaluation; Phase velocity; Bulk modulus; Compressibility;

    Sammanfattning : Today, microbubbles are one of the most commonly used ultrasound contrast agents, since their high compressibility results in a strongly scattered signal. Despite this advantage, microbubbles experience limitations by the decreased stability and large diameter. LÄS MER

  3. 2. Acoustic Characterization of the Frequency-Dependent Attenuation Profile of Cellulose Stabilized Perfluorocarbon Droplets

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Lisa Saljén; [2020]
    Nyckelord :Ultrasound; Contrast Agent; Attenuation; Acoustic Characterization; Non Destructive Evaluation; Perfluorocarbon; Droplet; Cellulose; Oscillation; Acoustic Droplet Vaporization;

    Sammanfattning : The use of ultrasound contrast agents increases the information available for reconstruction during ultrasound imaging. Previously studied microbubbles, consisting of a gas core, are subject to limitations such as a short lifetime and a large size. LÄS MER

  4. 3. Binding of per- and polyfluoroalkyl substances (PFASs) to organic soil horizons of peat and mor : effect of solution chemistry and soil organic matter composition

    Master-uppsats, SLU/Dept. of Soil and Environment

    Författare :Jennifer Makselon; [2019]
    Nyckelord :sorption; electrostatic interactions; isotherms; partitioning coefficient; soil organic matter; cation; PFOS; PFOA; desorption;

    Sammanfattning : The understanding of sorption processes of per- and polyfluoroalkyl substances (PFASs) in soils is important for the determination of their fate and transport in the environment. The sorption behavior of PFASs of varying chain length and hydrophilic headgroup was studied in three organic soils, two peat soils and one mor layer, with differing chemical composition of the soil organic matter (SOM). LÄS MER

  5. 4. Acoustic Droplet Vaporization of Perfluorocarbon Filled Microdroplets

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Didrik Nimander; [2019]
    Nyckelord :Medical engineering; Acoustic Droplet Vaporization; Ultrasound; Contrast agent;

    Sammanfattning : The use of peruorocarbon lled droplets for use as Phase Changing Contrast Agents (PCCAs) is a promosing eld. These capsules also have potential to be used for mediated drug delivery. The phase change, which has given the capsules their name, is the process when the capsule transforms from a droplet into a bubble. LÄS MER

  7. 5. Removal of poly- and perfluoroalkyl substances from water using the BDD electrode

    L3-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Winnie Nassazzi; [2018]
    Nyckelord :PFAS; drinking water; advanced oxidation processes; membrane reject water; electrochemical treatment; BDD electrode;

    Sammanfattning : Poly-and perfluoroalkyl substances (PFASs) have been used for a wide range of purposes due to their unique properties. Unfortunately, these compounds have been associated with several adverse health effects and high persistence in the environment, therefore, creating a need for their elimination from the environment. LÄS MER