Essays about: "analytical chemistry"

Showing result 11 - 15 of 46 essays containing the words analytical chemistry.

  1. 11. Polymerized Tubular Silicates in Lower Cambrian Carbonates – Biology or Chemistry?

    University essay from Uppsala universitet/Institutionen för geovetenskaper

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

    Abstract : 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. READ MORE

  3. 12. Spectroscopic model characterisation of hot exoplanet atmospheres

    University essay from Lunds universitet/Astronomi - Genomgår omorganisation; Lunds universitet/Fysiska institutionen

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

    Abstract : 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. READ MORE

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

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

    Author : Hanna Ravry; [2022]
    Keywords : phosphorus; sediment; oligotrophication;

    Abstract : 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. READ MORE

  5. 14. Developing complementary supercritical fluid chromatographic methods for a high throughput purification process

    University essay from Karlstads universitet

    Author : Alma Söderström; [2022]
    Keywords : Supercritical Fluid Chromatography; Pharmaceutical Industry; Column screening; Green chemistry; Superkritisk vätskekromotografi; Läkemedelsindustri; Kolonn set; Grön kemi;

    Abstract : Supercritical fluid chromatography (SFC) is an expanding chromatographic technique that is part of the evolving field of green chemistry due to its short run times and use of non-toxic solvents in combination with recycled CO2. The use of a suitable column is essential for separation science in general and there is a wide variety of SFC compatible columns available on the market. READ MORE

  6. 15. Development and validation of an ultrahigh-performance liquid chromatography method for identity, assay and impurity testing of nicotine and preservatives in nicotine nasal spray

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Amane Kandas; [2021]
    Keywords : Nicotine; Nicotine nasal spray; Ultrahigh-performance liquid chromatography; Development; Validation; Technical analytical chemistry; Chemistry;

    Abstract : The topic of this study is to develop and validate an analysis method of nicotine nasal spray produced at McNeil AB. When developing the analysis method, several parameters were determined in advance to make the method more similar to other analysis methods at the company, making it more practical. READ MORE