Sökning: "DHP"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet DHP.

  1. 1. Light-induced yellowing studied with ¹³C-enriched CW-DHP and solid state ¹³C NMR spectroscopy

    Författare :Jim Parkås; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; solid state; yellowing; picea abies; differentiation xylem; spruce; DHP; lignin; 13C NMR spectroscopy; 13C-enrichment;

    Sammanfattning : .... LÄS MER

  3. 2. 13C-Enriched Dehydrogenation Polymers Used for Studying Light-Induced Yellowing of Lignocellulosic Materials

    Författare :Jim Parkås; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lignin model compounds; differentiating xylem; yellowing; Picea abies; 13C NMR spectroscopy; lignin; DHP; 13C-enrichment; solid state; spruce;

    Sammanfattning : This study deals with the use of selectively 13C-enriched dehydrogenation polymers (DHPs) as models of lignin in lignocellulosic materials for elucidating the reaction pathways involved in light-induced yellowing. Methods for the synthesis of coniferin, a precursor to lignin and DHP, selectively 13C-enriched in the aromatic ring (positions 1, 3, 4, and 5) have been developed. LÄS MER

  4. 3. Biochemical Control Aspects in Lignin Polymerization

    Författare :Anders Holmgren; Gunnar Henriksson; Liming Zhang; Jussi Sipilä; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lignin polymerization; DHP; Ascorbic Acid; NADH; template polymerization; melanin; Chemistry; Kemi;

    Sammanfattning : Lignins are produced by all vascular plants and they represent one of the most abundant groups of biopolymers in nature. Lignin chemistry research, which has been of great importance for the progress of pulping technologies, has been plagued by the difficulties of its isolation and characterization. LÄS MER

  5. 4. Novel combination chemotherapy for treatment and control of schistosomiasis among school children

    Författare :Rajabu Hussein Mnkugwe; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Despite reported success in reducing severe disease-associated morbidities in endemic countries, praziquantel (PZQ) alone has failed to control and eliminate schistosomiasis, partly due to its poor efficacy against immature/juvenile worms. Artemisinin derivatives are efficacious against juvenile schistosomes. LÄS MER

  7. 5. Optimization of intermittent preventive therapy for malaria during pregnancy : effectiveness of dihydroartemisinin-piperaquine versus sulfadoxine-pyrimethamine

    Författare :Eulambius Mathias Mlugu; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Malaria is a Tropical disease caused by different parasites species of genius Plasmodium. Because of pregnancy associated lowered immunity, women who are pregnant are at higher risk to malaria infection than non-pregnant women. LÄS MER