Sökning: "Fourier Transform Spectrometry"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden Fourier Transform Spectrometry.

  1. 1. A study of optical and structural properties of spin-coated V2O3 thin films on sapphire substrates

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Jennifer Silander; [2022]
    Nyckelord :Optical properties; transmittance; FTIR spectrometry; scanning electron microscopy; x-ray diffraction; metal-insulator transition; crystalline material; sol-gel; spin-coating; vanadium oxide; infrared light;

    Sammanfattning : Many transition metal oxides exhibit a Metal-Insulator Transition (MIT). This is an interesting phenomenon where the material undergoes a structural phase transition, and the electronic charge is redistributed in the crystal lattice. LÄS MER

  3. 2. Evaluation of Esterification as a Valorization Route for Oxidized Lignin

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Industriell miljö- och processteknik

    Författare :Johanna Lindmark; [2017]
    Nyckelord :Lignin; Kraft Lignin; Esterification; Peracetic Acid; Oxidized Lignin; Muconic Acid; Vanillic Acid;

    Sammanfattning : RISE Bioeconomy is working with the biorefinery concept. That is, for the company, to utilize all wood derivatives in effective processes, resulting in unique products. RISE Bioeconomy is investigating the possibilities of producing holocellulose through an oxidative delignification process of wood, using peracetic acid (PAA). LÄS MER

  4. 3. Lake condition changes of a boreal lake over the past ca. 6500 years based on varve geochemistry

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

    Författare :Jora Ligtenberg; [2017]
    Nyckelord :varved lake sediment; total element concentrations; biogenic silica; lake-water organic carbon; Holocene;

    Sammanfattning : The purpose of this study was to assess changes in the in-lake conditions of lake Kassjön, northern Sweden, in response to environmental and climate changes over the past ca. 6500 years. LÄS MER

  5. 4. Data acquisition system for optical frequency comb spectroscopy

    Master-uppsats, Umeå universitet/Institutionen för fysik

    Författare :Ragnar Seton; [2017]
    Nyckelord :DAQS; HITRAN; MATLAB; libmx; Fourier Transform Spectrometry; Real time data visualization;

    Sammanfattning : The Optical Frequency Comb Spectroscopy (OFCS) Group at the Department of Physics at Umeå University develops new techniques for extremely high sensitivity trace gas detection, non invasive temperature measurements, and other applications of OFCS. Their setup used primarily for trace gas detection contains several components that have been developed in-house, including a Fourier Transform Spectrometer (FTS) and an auto-balancing detector. LÄS MER

  7. 5. De levandes gåvor och de dödas efterlämningar : -En kemisk analys på harts och ökendadel (Balanites aegyptiaca) från två egyptiska kärl

    Kandidat-uppsats, Arkeologiska forskningslaboratoriet

    Författare :Felicia Biström Freij; [2014]
    Nyckelord :Archaeological science; Laborativ arkeologi; Ancient Egypt; Forntida Egypten; Resin; Harts; Embalming; Balsamering; Balanites aegyptiaca; Ökendadel; Fourier transform infrared spectroscopy; Fouriertransformerad infrarödspektroskopi; Gas chromatography–mass spectrometry; Gaskromatografi med masspektrometri;

    Sammanfattning : This paper aims to investigate the embalming process and the Balanites aegyptiaca from two pottery originated in ancient Egypt. The two objects were from Medelhavsmuseet in Stockholm. LÄS MER