Search for dissertations about: "Bioorganisk kemi."

Showing result 11 - 15 of 29 swedish dissertations containing the words Bioorganisk kemi..

  2. 11. Discovery-Oriented Screening of Dynamic Systems: Combinatorial and Synthetic Applications

    Author : Marcus Angelin; Olof Ramström; Stefan Kubik; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; chemical education; crystallization; dynamic combinatorial chemistry; dynamic combinatorial resolution; dynamic system; enzyme catalysis; isoindolinone; lipase; nitroalcohol; nitroaldol reaction; phthalide; reversible; secondary alcohol; systems chemistry; tandem reaction; Organic chemistry; Organisk kemi; Bioorganic chemistry; Bioorganisk kemi;

    Abstract : This thesis is divided into six parts, all centered around the development of dynamic (i.e., reversibly interacting) systems of molecules and their applications in dynamic combinatorial chemistry (DCC) and organic synthesis. READ MORE

  4. 12. Studies on the Non-covalent Interactions (Stereoelectronics, Stacking and Hydrogen Bonding) in the Self-assembly of DNA and RNA

    Author : Parag Acharya; Jyoti Chattopadhyaya; Frank Seela; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bioorganic chemistry; nucleic acids; NMR; Stereoelectronic effects; Hydrogen Bonding; Stacking; Bioorganisk kemi; Bioorganic chemistry; Bioorganisk kemi;

    Abstract : This thesis is based on ten publications (Papers I-X). The phosphodiester backbone makes DNA or RNA to behave as polyelectrolyte, the pentose sugar gives the flexibility, and the aglycones promote the self-assembly or the ligand-binding process. READ MORE

  5. 13. Studies on Nucleic Acids – Structure and Dynamics

    Author : Johan Isaksson; Jyoti Chattopadhyaya; Douglas H. Turner; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bioorganic chemistry; nucleic acids; modified nucleotides; NMR; structure; dangling-end; single-stranded; thermodynamics; hydration; Bioorganisk kemi; Bioorganic chemistry; Bioorganisk kemi;

    Abstract : This thesis is based on six papers, Papers I-VI, focusing on the interplay between the stabilizing elements of nucleic acids self-assembly; hydrogen bonding, stacking and solvent effects. In Paper I we investigate how the substitution of the O4' for CH2 in the sugar moiety of adenosine (2'-deoxyaristeromycin) at the A6 position of the Dickerson-Drew dodecamer makes the two modified bases exist in a dynamic equilibrium between Hoogsteen and Watson-Crick base pairing in the NMR time scale. READ MORE

  6. 14. Chemically Modified Oligonucleotides: Synthesis, Physicochemical and Biochemical Properties of their Duplexes with DNA and RNA

    Author : Pushpangadan Indira Pradeepkumar; Jyoti Chattopadhyaya; Jesper Wengel; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bioorganic chemistry; Antisense oligonucleotides; Dipyridophenazine; Oxetane; RNase H; Gene down-regulation; DNase 1; Charge transport; Bioorganisk kemi; Bioorganic chemistry; Bioorganisk kemi;

    Abstract : This thesis is based on 9 papers dealing with the synthesis, physicochemical and biochemical properties of two types of chemically modified oligonucleotides which have the potential to down-regulate gene expression: (i) The first set is comprised of antisense oligonucleotides (AONs) conjugated with different chromophores of varying size, charge and π-electron density. Conjugation of the chromophores at the 3'- or 5'-end enhanced the target RNA binding affinity and RNase H recruitment capabilities compared to the native counterpart without changing the global helical conformation of their AON/RNA hybrid duplexes. READ MORE

  7. 15. Development and Evaluation of Tools to Explore Posttranslational HexNAc-Tyrosine and Mucin-Type O-Glycosylation

    Author : Sandra Behren; Ulrika Westerlind; Mikael Elofsson; Carmen Galan; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Glycopeptides; mucins; mucin type-O-glycosylation; microarrays; tyrosine-O-HexNAcylation; lectins; MUC1 cancer vaccines; TcdA; LecB; galectins; LacdiNAc; antibodies; biologisk kemi; biological chemistry; Biorganic Chemistry; bioorganisk kemi; organisk kemi; Organic Chemistry;

    Abstract : Glycosylation is the most abundant form of post-translational modification (PTM). Recently, O-glycosylation attracted much attention in the glycoproteomic field due to its association with various diseases, such as pathogenic infections and cancer. READ MORE