Sökning: "spektroskopi"

Visar resultat 16 - 20 av 126 uppsatser innehållade ordet spektroskopi.

  1. 16. Green Protein Hydrogels and Non-dry Aerogels in Water Purification

    Kandidat-uppsats, KTH/Kemi

    Författare :Emanuel Nelsson Vedung; Alexander Singh; Julia Wadefjord; [2022]
    Nyckelord :Aerogel; Hydrogel; Whey Protein Isolate; Water purification; Adsorption; Sustainability;

    Sammanfattning : Having access to clean water is not a certainty for every human being. Today, there are major problems with polluted water that not just affect us humans, but also the ecosystem around us. In recent years, research into making aerogels from protein nanofibrils (PNF) has increased. LÄS MER

  3. 17. An Infrared Stellar Thermometer: Exploiting IGRINS Spectra

    Kandidat-uppsats, Lunds universitet/Astronomi - Genomgår omorganisation

    Författare :Emelie Sandved; [2022]
    Nyckelord :Effective temperature; K-giants; surface gravity; oxygen abundance; carbon abundance; CO lines; OH lines; line sensitivities; Physics and Astronomy;

    Sammanfattning : Using the infrared (IR) spectral range when measuring stellar spectra is beneficial compared to using the optical range mainly when observing distant stars through the dust dense interstellar regions in the Galactic mid-plane. Methods to determine stellar parameters from IR spectra are, however, not fully developed yet because technological difficulties in creating reliable IR detectors have slowed the advance of such methods. LÄS MER

  4. 18. Prototype Instrumentation for Frequency Domain – Functional Near Infrared Spectroscopy

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Rohit Rathnam Nareshkumar; [2022]
    Nyckelord :Neurofeedback; Frequency domain fNIRS; vertical-cavity surface-emitting laser; silicon photomultiplier;

    Sammanfattning : Frequency domain functional near infrared spectroscopy (FD-fNIRS) is a tissue optical measurement technique used to measure absolute haemoglobin concentrations in brain tissue. This work is intended to be the first step in the development of a wearable, low-cost FD-fNIRS device for neurofeedback applications. LÄS MER

  5. 19. Record of the end-Triassic mass extinction in shallow marine carbonates: the Lorüns section (Austria)

    Master-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Linus Brakebusch; [2022]
    Nyckelord :sedimentology; geochemistry; ooids; oolites; oncoids; oncolites; Triassic; Jurassic; Rhaetian; Hettangian; ocean acidification; Earth and Environmental Sciences;

    Sammanfattning : The end-Triassic mass extinction (ETE) was one of the five big mass extinctions of the Phanerozoic and occurred ~201 Ma ago. Research agrees that the main triggering factor for the ETE was the eruptions of the Central Atlantic Magmatic Volcanic Province (CAMP), linked to the break-up of the supercontinent Pangaea. LÄS MER

  7. 20. Synthesis of a rotaxane with switchable lanthanide luminescence

    Master-uppsats, KTH/Organisk kemi

    Författare :Anja Ramström; [2022]
    Nyckelord :mechanically interlocked molecules; supramolecular chemistry; luminescence; rotaxanes; lanthanides; mekaniskt sammankopplade molekyler; supramolekylär kemi; luminescens; rotaxaner; lantanider;

    Sammanfattning : I rotaxaner följs förflyttningen av makrocykeln vanligtvis med 1H-NMR spektroskopi. Målet med detta projekt är i stället att utveckla ett system som möjliggör att förflyttningen av makrocykeln kan observeras med hjälp av luminiscerande lantanid emission. LÄS MER