Essays about: "Blekning"

Showing result 1 - 5 of 8 essays containing the word Blekning.

  1. 1. Optical Communication using Nanowires and Molecular Memory Systems

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Synkrotronljusfysik

    Author : Thomas Kjellberg Jensen; [2024]
    Keywords : neuromorphic computing; nanowire; molecular dye; DASA photoswitch; OBIC; Physics and Astronomy;

    Abstract : Neuromorphic computational networks, inspired by biological neural networks, provide a possible way of lowering computational energy cost, while at the same time allowing for much more sophisticated devices capable of real-time inferences and learning. Since simulating artificial neural networks on conventional computers is particularly inefficient, the development of neuromorphic devices is strongly motivated as the reliance on AI-models increases. READ MORE

  3. 2. Impact of pre-treatments on the brightness stability of a conventional and near neutral pH ECF-light bleaching sequence

    University essay from KTH/Fiber- och polymerteknologi

    Author : Ali Amirjani; [2023]
    Keywords : ECF; Bleaching; Pulp; AOX; Brightness Stability; ECF; Blekning; Massa; AOX; Ljushetsstabilitet;

    Abstract : Syftet med denna studie är att undersöka inverkan av förbehandlingar på ljushetsstabiliteten av Northern Bleached Softwood Kraft (NBSK) som har blekts enligt (OO) (OP) D/Dn (PO) bleksekvensen. Effekten av förbehandling med xylanas (X), mild sur (A), DTPA (Q) samt ett kombinerad DTPA- & xylanassteg (Q+X) har studerats. READ MORE

  4. 3. Analysis of Methanol Based Chlorine Dioxide Production : An analysis of sodium chlorate reduction efficiency and investigation of salt cake filter wash on an SVP-LITE® system

    University essay from Karlstads universitet

    Author : Emil Lundh; [2023]
    Keywords : ECF; SVP-LITE®; chlorine dioxide; bleaching; ECF; SVP-LITE®; Klordioxid; blekning;

    Abstract : This work aimed to determine how effective an SVP-LITE® chlorine dioxide plant at Vallviks Bruk was running. This was done by determining the chemical consumption per unit of chlorine dioxide produced. The calculations relied upon online instrumentation that was manually validated. READ MORE

  5. 4. Toothwhit"eu"ning

    University essay from Malmö högskola/Odontologiska fakulteten (OD)

    Author : Fredrik Bengtsson; Martin Svanberg; [2016]
    Keywords : Child; Adolescent; tooth discoloration; tooth whitening; tooth bleaching; hydrogen peroxide; carbamide peroxide;

    Abstract : SyfteAtt utvärdera effekterna och bieffekterna av tandblekningsprodukter innehållande eller utsöndrande av väteperoxid på permanenta tänder hos personer under 18 år. Studien gjordes med tanke på barn som drabbats av missfärgade tänder med ett objektivt och subjektivt behandlingsbehov. READ MORE

  6. 5. The origin of fibre charge in chemical pulp

    University essay from KTH/Skolan för kemivetenskap (CHE)

    Author : Pär Lindén; [2013]
    Keywords : Hardwood kraft pulp; Eucalyptus; Uronic acid; Lignin; Total charge; Carboxylic groups; Conductometric titration; Methanolysis; Acid hydrolysis; Kappa number;

    Abstract : Chemical components in wood contain multiple anionic groups, including carboxyl groups and hydroxyl groups. During kraft cooking and bleaching, such structures are also formed, degraded or modified by the action of reactions both deliberate and unwanted. It has previously been found by Laine that anionic groups with pKa values of 3.3 and 5. READ MORE