Sökning: "surface electrostatic potential"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden surface electrostatic potential.

  1. 1. Ion pair chromatography of carboxylic and sulfonic acids with trialkylamines : An investigation of the relationship between the adsorption isotherm of the IPR and the retention factor of the analyte

    Kandidat-uppsats, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper (from 2013)

    Författare :Karl Kullberg; [2023]
    Nyckelord :;

    Sammanfattning : Ion pair chromatography has found many uses within analytical chemistry and understanding of the chromatographic process with an ion-pairing reagent have been studied since the 1970s. The adsorption of the Ion-pairing reagent to the stationary phase is understood to be important and many studies have been dedicated to looking at the adsorption isotherms of the earlier quaternary alkylammonium ions. LÄS MER

  3. 2. Quantum chemical studies of the reactivity of gold nanoparticles towards molecular radicals

    Master-uppsats, KTH/Kemi

    Författare :Sofia Larsson; [2022]
    Nyckelord :gold nanoparticles; surface electrostatic potential; average local ionization energy; electron attachment energy; free molecular radicals; guldnanopartiklar; elektrostatisk ytpotential; genomsnittlig lokal joniseringsenergi; fria molekylära radikaler;

    Sammanfattning : Kvantkemiska studier av reaktiviteten hos guldnanopartiklar Au3-Au11 och Au13 mot O- centrerade molekylradikaler OH , OOH , OCH3   och H2O undersöks. Olika molekylära ytegenskaper tas med i beräkningen, elektrostatiska ytpotentialen, den genomsnittliga lokala joniseringsenergin, electron attachment energy och spinndensiteten (VS(r), IS(r), TS(r), ES(r) och S(r)). LÄS MER

  4. 3. THE ROLE OF WATER PURITY IN EMULSIFICATION AND REMOVAL OF OIL FROM SOLID SURFACES

    Master-uppsats, Malmö universitet/Institutionen för biomedicinsk vetenskap (BMV)

    Författare :Andriani Tsompou; [2021]
    Nyckelord :ultra-pure water; detergency; detachment of oil from solid surfaces; washing; cleaning;

    Sammanfattning : Detergents are broadly used in our everyday life for cleaning and washing procedures. They are however, a source of water pollution and can have a negative effect on human health and the environment. To reduce their negative impact, a new trend of using only pure water for washing and cleaning applications is being implemented. LÄS MER

  5. 4. The Effect of In Vitro Gastrointestinal Condition on Aggregation of Nano Silica Particles

    Master-uppsats, Lunds universitet/Livsmedelsteknik och nutrition (master)

    Författare :Shuai Bai; [2018]
    Nyckelord :Silica nanoparticles; in vitro digestion; Aggregation; Asymmetrical flow field flow fractionation; DLVO; membrane interaction; food technology; livsmedelsteknologi; Chemistry;

    Sammanfattning : The presence of Nano particles in food is a topic that have gain much attention lately. The aim of this study is to investigate the aggregation behavior of nano silica under in vitro gastrointestinal conditions using asymmetric flow field flow fractionation (AF4) coupled with several detectors. LÄS MER

  7. 5. Deriving the Undisturbed Near-surface Lunar Electric Field : Simulations of the electrostatic environment of the Umeå Lunar Venture electric field instrument

    Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

    Författare :Konrad Steinvall; [2017]
    Nyckelord :;

    Sammanfattning : The existence of an electric field on the Moon has been theorized since the end of the 1960s, when reports from astronauts suggested that charged particles from the lunar surface could be seen interacting with light at high altitudes. Today it is believed that an electric field drives the motion of charged particles on the Moon, and although a good number of simulations investigating the field have been made, the electric field has not been measured experimentally. LÄS MER