Essays about: "Carboxylic Acid"

Showing result 21 - 25 of 28 essays containing the words Carboxylic Acid.

  1. 21. Evaluation of the Removal Efficiency of Per- and Polyfluoroalkyl Substances in Drinking Water using Nanofiltration Membranes, Active Carbon and Anion Exchange

    University essay from Uppsala universitet/Luft-, vatten- och landskapslära

    Author : Klara Lindegren; [2015]
    Keywords : PFASs; perfluoroalkyl substances; removal efficiency; NF; nanofiltration; membrane; GAC; granular activated carbon; AE; anion exchange; PFAS; perfluorerade alkylsubstanser; reningseffektivitet; NF; nanofiltrering; membran; GAC; granulärt aktivt kol; AE; jonbytarmassa;

    Abstract : Per- and polyfluoroalkyl substances (PFASs) is a group of man-made, highly persistent chemicals. Due to the specific surface-active attributes of these molecules, applications are numerous and feed an economically important industry. During the last decade, PFASs have been detected globally in the environment, living organisms and tap water. READ MORE

  3. 22. Qualitative and Quantitative Analysis of Biodiesel Deposits Formed on a Hot Metal Surface

    University essay from Institutionen för fysik, kemi och biologi; Tekniska högskolan

    Author : Emilie Westberg; [2013]
    Keywords : Fatty Acid Methyl Ester FAME ; Biodiesel deposits; SEM EDS; ATR-FTIR; GCMS;

    Abstract : This thesis aims to investigate the formation of deposits from thermally degraded biodiesel on a hot metal surface under the influence of sodium or copper contaminations. Biodiesel or Fatty Acid Methyl Esters (FAMEs) is a widely utilized biofuel with the potential to replace fossil fuels, however, issues regarding the thermal and oxidative stability prevent the progress of biodiesel for utilization as vehicle fuel. READ MORE

  4. 23. 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

  5. 24. The influence of salt in the formation of carboxylic functionalized mesoporous silica

    University essay from Lunds universitet/Kemiska institutionen

    Author : Ruiyu Lin; [2012]
    Keywords : Nanokemi; Chemistry;

    Abstract : Popular summary This master thesis was focused on the influence of salt, such as NaCl and CaCl2, in the formation of carboxylic functionalized mesoporous silica materials. Mesoporous silica materials are one type of porous materials with a pore size between 2 and 5 nm (1݊݉ = 0.000000001 ݉ ). READ MORE

  6. 25. Optimization of CarG crystals : a protein involved in the biosynthesis of 1-carbapen-2-em-3-carboxylic acid (Car); a beta-lactam antibiotic

    University essay from SLU/Dept. of Molecular Biology (until 131231)

    Author : Teres Persson; [2012]
    Keywords : carbapenem; CarG; optimization; purification; crystallography;

    Abstract : Carbapenems are one of the most widely used groups of antibiotics because of their broad spectrum against both gram positive and gram negative bacteria. The biosynthesis of the simplest carbapenem, 1-carbapen-2-em-3- carboxylic acid (Car) is controlled by an operon of eight genes, CarA-H. READ MORE