Sökning: "needle mass"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden needle mass.

  1. 1. Urea-Based Treatments of Unretted Hemp Fibres from Residual Streams

    Master-uppsats, Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Författare :Danilo Esteban Ortiz Sarasty; [2023]
    Nyckelord :Finola waste; stalks; unretted hemp fibres; degumming; cold urea alkali; microwave-urea;

    Sammanfattning : More sustainable and efficient degumming methods are required to extract finner bast fibres, especially from agro-industrial waste streams such as stalks from hemp for food purposes. For this reason, in this study, two urea-based treatments were evaluated as degumming alternatives for unretted hemp fibres from residual streams, one at cold and alkaline conditions (CUA) and the other in combination with microwave radiation (MWU). LÄS MER

  3. 2. Utveckling av Polydimetylsiloxan-Mikropartiklar för Biomedicinsk NMR

    Kandidat-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Mohammad Al-Sultani; Josef Djärf; [2022]
    Nyckelord :Technology and Engineering;

    Sammanfattning : Nuclear magnetic resonance spectroscopy is a technique for identifying molecular structures, compositions etc. and is widely used in many life science research fields. The purpose of this project is to synthesize PDMS microparticles with a magnetic susceptibility matching water, which makes them applicable for use in NMR of biological samples. LÄS MER

  4. 3. Design of a FEEP Thruster for Micro-/Nano-Satellites

    Master-uppsats, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Muhammad Ali Badami; [2019]
    Nyckelord :FEEP; Cube Satellite; Indium; Slit Emitter;

    Sammanfattning : CubeSat development has seen a rise since the first launch in 2003 due to faster design process and low launch costs. It has played a vital role in providing access to space to small start-ups and academic organizations with low budgets. LÄS MER

  5. 4. Rheological changes at the air-liquid interface and examining different kind of magnetic needles

    Master-uppsats, Karlstads universitet/Avdelningen för kemiteknik

    Författare :Fredrik Anderson; [2015]
    Nyckelord :Interfacial Shear Rheometer; rheometry; magentic needles; oscillation; surface chemistry; modulus; elastic; viscous; viscoelasticity; Reologi; elasticitetsmodul; oscillering; magnetiska nålar; viskositet; viskoelasticitet;

    Sammanfattning : The main objective in this work was to learn how the instrument, the Interfacial Shear Rheometer (ISR400), worked and to investigate how the rheological properties, storage modulus (elasticity), G' and loss modulus (viscous), G'', changes when the surface pressure at the air-liquid interphase changes. The second objective were to examine the different kind of magnetic needles used in the experiments and to conclude which type of needle is best for its specific field of analysis. LÄS MER

  7. 5. Skogsbränslets fraktionsfördelning

    Kandidat-uppsats, Linnéuniversitetet/Institutionen för skog och träteknik (SOT)

    Författare :Magnus Ljungberg; [2015]
    Nyckelord :Chipped logging residuals; Needle content; Particel size distribution; Barrinnehåll; Flisat skogsbränsle; Fraktionsfördelning;

    Sammanfattning : This study has analyzed particel size distribution and needle content in chipped logging residuals (branches and tops) delivered to the district heating plant Ryaverket in city of Borås, Sweden. Two fuel assortments has been analyzed: Chipped logging residuals from pure softwood and from mixed fuel (connifers and broadleaves). LÄS MER