Sökning: "analytical chemistry"

Visar resultat 11 - 15 av 57 uppsatser innehållade orden analytical chemistry.

  1. 11. Extraction efficiency of four pesticides using the QuEChERS extraction method and analysis by HPLC/DAD

    Kandidat-uppsats, Lunds universitet/Kemiska institutionen

    Författare :Honia Rasul; [2022]
    Nyckelord :analytical chemistry; pesticides; QuEChERS; soil; Chemistry;

    Sammanfattning : A cleanup step is essential from an analytical perspective, to improve the chance of quantification and to minimize interference. Pesticides in soil are a necessity is agriculture for survival of crops and protection from unwanted growth and pests. LÄS MER

  3. 12. Polymerized Tubular Silicates in Lower Cambrian Carbonates – Biology or Chemistry?

    Kandidat-uppsats, Uppsala universitet/Institutionen för geovetenskaper

    Författare :Scott Green; [2022]
    Nyckelord :biosignature; tubular structures; Lower Cambrian; silica precipitation; bifurcating; biosignatur; rörstrukturer; Kambrium Serie 3; kiseldioxid utfällning; förgrening;

    Sammanfattning : Shallow marine environments from the Lower Cambrian period were very different to shallow marine environments of today. Tubes of what was thought to be silica recovered from a partly dolomitized carbonate sample collected form a site near Indian Springs, Nevada could help further understand the chemistry and characteristics of such environments. LÄS MER

  4. 13. Från serum till plasma : Jämförelse av paratyroideahormon samt kortisol på Cobas 8000®

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för kemi och biomedicin (KOB)

    Författare :Maline Mellberg; [2022]
    Nyckelord :Parathyroid hormone; cortisol; electrochemical luminescence; Cobas 8000®; imprecision; correlation; Paratyroideahormon; kortisol; elektrokemilumenicense; Cobas 8000®; imprecision; korrelation;

    Sammanfattning : Paratyroideahormon (PTH) och kortisol är två analyter som i dagsläget analyseras i serum med elektrokemilumenicense på instrumentet Cobas 8000® på Klinisk Kemi på Länssjukhuset i Kalmar. I framtiden är det planerat att övergå till att analysera dem i plasma. LÄS MER

  5. 14. Spectroscopic model characterisation of hot exoplanet atmospheres

    Master-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

    Författare :Elin Sandvik; [2022]
    Nyckelord :Transit method; Transmission spectroscopy; Exoplanets; Hot Jupiter; Modelling; Physics and Astronomy;

    Sammanfattning : Hot Jupiters are gas giants under intense stellar radiation with short orbital periods of only a few days. Due to their large radii, hot temperatures, and large scale heights, hot Jupiters can be observationally characterised in detail through spectroscopy over an entire orbital phase. LÄS MER

  7. 15. P-cycling in sub-Arctic lakes – the importance of sediment release and retention

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

    Författare :Hanna Ravry; [2022]
    Nyckelord :phosphorus; sediment; oligotrophication;

    Sammanfattning : Oligotrophication is generally caused by a decreased nutrient availability, usually due to phosphorous limitation. This is a phenomenon impacting the entire food web and at worst causing cascading alterations within an ecosystem. Lakes of the Northern Hemisphere have lately been documented to be subjected to oligotrophication (e.g. LÄS MER