Sökning: "absorbance ratio"

Visar resultat 1 - 5 av 9 uppsatser innehållade orden absorbance ratio.

1. 1. Biocatalysis in Pickering emulsions

   Master-uppsats, Lunds universitet/Bioteknik (master); Lunds universitet/Bioteknik (CI)

   Författare :Christine Vera Isabel Schmidt; [2023]
   Nyckelord :Enzymes; Pickering emulsion; Amine Transaminases; Green Chemistry; Stereoselectivity; Biotechnology; Biology and Life Sciences;

   Sammanfattning : Employing enzymes as catalysts in the production of chiral amines that are both used as building blocks and active pharmaceutical ingredients might be promising due to milder reaction conditions compared to non-biological catalysts, exclusion of heavy metals, high selectivity towards substrates and precision in chirality of the products. Transaminases are attractive for the use in this process. LÄS MER

3. 2. Dissolved organic carbon (DOC) : Differences in reactivity amongst water sources to boreal streams in Sweden

   Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

   Författare :Lukas Eriksson; [2018]
   Nyckelord :Dissolved organic carbon; DOC; Discrete riparian inputs; Resazurin; Resorufin;

   Sammanfattning : The importance of dissolved organic carbon (DOC) to aquatic environments is well established in the scientific community. In boreal landscapes, small streams receive water from headwater lakes, mires, and discrete flow paths that drain riparian soils. 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. The suitability of using Landsat TM-5 Images for estimating chromophoric dissolved organic matter in subarctic Lakes

   Kandidat-uppsats, Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Författare :Julia Jakobsson; [2014]
   Nyckelord :CDOM; dissolved organic carbon; colored dissolved organic matter; Chromophoric; landsat thematic mapper 5; subarctic lakes; Stordalen; empirical algorithm.; Abisko; DOC; remote sensing; Physical Geography and Ecosystem Science; Earth and Environmental Sciences;

   Sammanfattning : Recent trends of permafrost thawing in the subarctic are expected to cause increased release of dissolved organic carbon (DOC) to inland waters, which might have cascading effects on downstream aquatic ecosystems and release of CO2 to the atmosphere. This study therefore aimed at evaluating the applicability of an empirical band ratio algorithm for estimating chromophoric dissolved organic matter (CDOM; a proxy for DOC) from the easily accessible satellite images Landsat TM-5, to counter the inaccessibility of the region in general. LÄS MER

7. 5. Reducering av DOC beroende av karaktär med fyra dricksvattenberedningstekniker : Jämförelse mellan fällning (FeCl3 och Al2(SO4)3), membranfiltrering och jonbyte med MIEX®

   Uppsats för yrkesexamina på avancerad nivå,

   Författare :Sarah Nilsson; Sofia Wängdahl; [2014]
   Nyckelord :DOC-character; precipitation; MIEX; membrane filtration; SUVA; absorbance; DOC-karaktär; fällning; MIEX; membran; SUVA; absorbans;

   Sammanfattning : Halten löst organiskt material (DOC) har under de senaste 20 åren ökat i våra sjöar. Det har också skett förändringar i karaktären. DOC ställer till problem för vattenverk som använder ytvatten som dricksvattenkälla genom att det kan ge lukt, smak och färg till vattnet. LÄS MER