Sökning: "absorbance index"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden absorbance index.

  1. 1. Water quality and organic matter linkages in waters draining arable fields

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

    Författare :Adam Eriksson; [2021]
    Nyckelord :Natural organic matter NOM ; particular organic matter POM ; dissolved organic matter DOM ; allochthonous; autochthonous; Florescence index FIX ; Freshness index BIX ; Humification index HIX ; SUVA 254; E2:E3; Spectral Slope; Observation fields; microbial matter; humic matter; unfiltered samples UF ; filtered samples F45 ;

    Sammanfattning : This study investigated leaching of natural organic matter (NOM) in twelve Swedish arable fields with regards to the quality of dissolved organic matter (DOM) and particulate organic matter (POM), using Absorbance (UV-Vis) and fluorescence spectrometry (EEM). DOM is defined as organic matter (OM) 0.45 μm. LÄS MER

  3. 2. How robust is water quality determination with optical measurements for highly polluted agricultural waters?

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

    Författare :Honorine Uwera; [2020]
    Nyckelord :turbidity; suspended sediments; dissolved organic matter; optical measurements;

    Sammanfattning : Optical technology is used to measure and monitor water quality, to date mainly in drinking water treatment, where water is typically much cleaner than in heavily polluted agricultural streams. To characterize suspended sediments (SS) and dissolved organic matter (DOM) in surface water some optical measurements have been used (absorbance and fluorescence spectroscopy). LÄS MER

  4. 3. Organic matter properties and their relation to phosphorus and nitrogen concentrations in Swedish agricultural streams

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

    Författare :Betty Ehnvall; [2017]
    Nyckelord :dissolved organic matter; excitation-emission fluorescence spectroscopy; absorbance spectroscopy; eutrophication; biogeochemistry; absorbance index; fluorescence index;

    Sammanfattning : Many agricultural streams in Sweden exhibit high concentrations of nitrogen, phosphorus, suspended sediments and dissolved organic matter (DOM). Together these substances cause eutrophication in streams, rivers and eventually the Baltic Sea. The interactions between different fractions of DOM and nutrients are not very well understood. LÄS MER

  5. 4. Influences of Key Components and Surface Modifications on Beer Lacing

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

    Författare :Junjing Wang; [2017]
    Nyckelord :image analysis; protein; iso-α-acid; Beer; lacing; hydrophilic and hydrophobic; food technology; livsmedelsteknologi; Agriculture and Food Sciences; Technology and Engineering;

    Sammanfattning : Beer is one of the most favorable alcoholic beverages and has a large consumption in the world. However, there are fewer beer consumers who perceive the lacing character after drinking. Four different concentrations (25 mg/L, 50 mg/L, 75 mg/L and 100 mg/L) of iso-α-acid and two levels (0.3% and 0. LÄS MER

  7. 5. Bestämning av optimal skördetidpunkt och lagringspotential för äpple med DA-meter

    Kandidat-uppsats, SLU/Dept. of Biosystems and Technology (from 130101)

    Författare :Sarah Eneqvist Staflin; [2017]
    Nyckelord :äpple; optimal skördetidpunkt; mognadsindex; DA-meter; fruktkvalitet; lagringssjukdom;

    Sammanfattning : För att kunna tillgodose marknadens och konsumenternas krav på högkvalitativ frukt krävs en långsiktig strategi för hantering av frukt vid och efter skörd. Därför har en ny metod tagits fram som på ett exakt och icke-destruktivt sätt bestämmer optimal skördetidpunkt och lagringsduglighet. LÄS MER