Search for dissertations about: "Hai Dong"

Showing result 1 - 5 of 6 swedish dissertations containing the words Hai Dong.

  2. 1. Efficient carbohydrate synthesis by controlled inversion strategies

    Author : Hai Dong; Olof Ramström; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbohydrate Chemistry; Carbohydrate Protection; Epimerization; Inversion; Dynamic; Regioselective Control; Neighboring Group Participation; Organic chemistry; Organisk kemi;

    Abstract : The Lattrell-Dax method of nitrite-mediated substitution of carbohydrate triflates is an efficient method to generate structures of inverse configuration. In this study it has been demonstrated that a neighboring equatorial ester group plays a highly important role in this carbohydrate epimerization reaction, inducing the formation of inversion compounds in good yields. READ MORE

  4. 2. Efficient Carbohydrate Synthesis By Intra- and Supramolecular Control

    Author : Hai Dong; Olof Ramström; Ulf Nilsson; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Carbohydrate Chemistry; Supramolecular Control; Ambident Reactivity; Bioorganic chemistry; Bioorganisk kemi;

    Abstract : The Lattrell-Dax method of nitrite-mediated substitution of carbohydrate triflates is an efficient method to generate structures of inverse configuration. In this study, the effects of the neighboring group on the Lattrell-Dax inversion were explored. READ MORE

  5. 3. Oxidation and Corrosion of New MCrAlX Coatings : Modelling and Experiments

    Author : Kang Yuan; Ru Lin Peng; Xin-Hai Li; Sten Johansson; Yan-Dong Wang; Robert Vaβen; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : MCrAlY coatings (“M” for Ni and/or Co) are widely used for the protection of superalloy components operated at high temperatures such as in the hot sections of gas turbines. The exposure to high temperature can cause coating degradation due to oxidation or hot corrosion at the coating surface. READ MORE

  6. 4. Thermal and Mechanical Behaviors of High Temperature Coatings

    Author : Kang Yuan; Lin Peng Ru; Xin-Hai Li; Sten Johansson; Yan-dong Wang; Nicolaie Markocsan; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : With superior oxidation and corrosion resistance, metallic coatings (i.e. diffusion coatings and MCrAlX coatings) are widely used to protect hot components made of superalloys in turbine engines. READ MORE

  7. 5. Evaluating implementation strategies for improved food safety in Vietnam

    Author : Hai Hoang Tuan Ngo; Johanna Lindahl; Mats Målqvist; Hung Nguyen-Viet; Fred Unger; Phuc Pham-Duc; Coen van Wagenberg; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Food safety; Intervention; Pork value chain; Cost of illness; Cost-Benefit analysis; Microbial contamination; Experimental auction; Salmonella;

    Abstract : Pork is the most popular and consumed meat in Vietnam, and the preference among consumers for fresh and “warm” pork makes the traditional pork value chain dominate the pork industry. This thesis assessed microbial contamination in pork, then evaluated the technical and economic aspects of light-touch interventions in improving the safety of pork in the small-scale value chain. READ MORE