Essays about: "Bleaching"

Showing result 11 - 15 of 51 essays containing the word Bleaching.

  1. 11. Correlating Photoconductivity with Photochromism in Oxygen-containing Rare-earth Metal Hydride Thin Films

    University essay from Uppsala universitet/Materialfysik

    Author : Suraya Kazi; [2021]
    Keywords : Rare-earth metal hydride; Thin film synthesis; Thin film characterization; Optical properties; Electrical properties; Chemical composition; Photochromic materials; Photoconductivity;

    Abstract : Scientists have recently discovered simultaneous photoconductivity and photochromism (i.e., optical switching upon light exposure) of oxygen-containing rare-earth metal hydrides (REMHO). A deep understanding of these extraordinary optical and electrical properties can open the door to advanced technological uses such as smart windows. READ MORE

  3. 12. Electric Transport of Rare-earth Metal Oxy-hydride Thin Films

    University essay from Uppsala universitet/Materialfysik; Uppsala universitet/Tillämpad kärnfysik

    Author : Suraya Kazi; [2021]
    Keywords : Photochromism; Photoconductivity; Rare-earth Metal Oxy-hydride; Electric Transport; Photodarkening; Yttrium Oxy-hydride;

    Abstract : In this project, I investigate the photoconductivenature of photochromic rare-earth metal oxy hydrides (REMHO). Such materials have received increasingscientific attention since they show a color-neutralphotochromic effect that can be applied, e.g., in smartwindows or chromogenic devices. READ MORE

  4. 13. Thermal induced yellowing of peroxide bleached birch pulp

    University essay from Luleå tekniska universitet/Industriell miljö- och processteknik

    Author : Alexander Nygren; [2020]
    Keywords : Accelerated ageing; Bleaching; Brightness reversion; Kraft pulp; pH; Yellowing;

    Abstract : Brightness reversion, also known as yellowing, is a well-known phenomenon which means that the brightness of paper products decreases during ageing. The name of this phenomenon is based on that paper products usually change in color towards yellow during ageing. READ MORE

  5. 14. Pelagic fish oil : methods for extraction and purification

    University essay from SLU/Department of Molecular Sciences

    Author : Linda Näsbom; [2020]
    Keywords : Pelagic fish; muscle; lipids; fish oil; pollution; purification; extraction.;

    Abstract : The Pelagic fishes are a wide group of fishes that live in the open water. They could be divided in two groups depending on the size, the small forage fishes and the large predators. These fishes swim regularly and have muscles with high lipid content. There are two types of muscles in the fish. READ MORE

  6. 15. Preparation of films and nonwoven composites from fungal microfibers grown in bread waste

    University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Author : Maximilian Köhnlein; [2020]
    Keywords : bread waste; chitin; chitosan; filamentous fungi; film; fungal cell wall; fungal microfibers; glucosamine; mycelia; N-acetyl-glucosamine; nonwoven; wet-laid;

    Abstract : Unsold bread makes up a signification fraction of waste occurring in Swedish supermarkets. This thesis seeks to address the problem of food waste, by cultivating filamentous fungi on bread waste and producing chitinous films and nonwovens from them. READ MORE