Sökning: "Structure dynamics"

Visar resultat 16 - 20 av 1346 avhandlingar innehållade orden Structure dynamics.

1. 16. Studies on Nucleic Acids – Structure and Dynamics

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

   Sammanfattning : 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. LÄS MER

3. 17. Stepfamily Dynamics in Sweden : Essays on family structure and children’s well-being

   Författare :Jani Turunen; Elizabeth Thomson; Livia Oláh; Frank F. Jr. Furstenberg; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Stepfamily; family structure; child well-being; sociologisk demografi; Sociological Demography;

   Sammanfattning : This thesis investigates different aspects of family structure and children’s well-being in Sweden. Applying a child perspective, it analyzes children’s likelihood of stepfamily entry, their emotional well-being in different family forms and educational outcomes in families with complex sibling structures. LÄS MER

4. 18. Structure and Dynamics of Hydrated Biopolymers

   Författare :Poornima Ramamohan; Jakob Wohlert; Istvan Furo; Fritjof Nilsson; KTH; []
   Nyckelord :Hydrated Polysaccharides; Molecular Dynamics Simulations; Structure-Function Properties; Convergence of Equilibrium Timescales; Chemical Heterogeneity; Hydrerade polysackarider; molekylära dynamiksimuleringar; struktur- funktionsegenskaper; konvergens av jämviktstidskalor; kemisk heterogenitet; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Sammanfattning : Hydrated polysaccharide systems primarily using xylans along with mutans and alternans were studied using long atomistic simulations over a few microseconds to analyse structure-function relationships and nanoscale interactions with moisture. The influence of various structural and chemical factors such as alignment, nature of glycosidic linkage, effect of moisture / chemical substitutions was explored with a focus on structure-dynamics correlations to aid in the effective functionalisation of biomaterials for the development of a green, circular bioeconomy. LÄS MER

5. 19. On the dynamics of footbridges : A theoretical approach and a comparison between running and walking loads

   Författare :Daniel Colmenares; Raid Karoumi; Andreas Andersson; Mahir Ülker Kaustell; Pedro Museros Romero; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; footbridges; dynamics; human induced loads; human structure interaction; harmonic load; continuous beam; gångbroar; dynamik; fotgängarlast; samverkan mellan fotgängare och bro; harmonisk last; kontinuerlig balk.; Structural Engineering and Bridges; Bro- och stålbyggnad;

   Sammanfattning : The dynamic behaviour of lightweight footbridges is often susceptible to HumanInduced Loads (HILs). Generally HILs are taken into account as moving harmonicfunctions in which the loading frequency represents the step frequency of the pedestrians. LÄS MER

7. 20. Dynamics in Ceria and Related Materials from Molecular Dynamics and Lattice Dynamics

   Författare :Anders Gotte; Kersti Hermansson; Micael Baudin; Anatoly Belonoshko; Uppsala universitet; []
   Nyckelord :Inorganic chemistry; molecular dynamics; diffusion; surface dynamics; ionic surfaces; Oorganisk kemi;

   Sammanfattning : In discussions of heterogeneous catalysis and other surface-related phenomena, the dynamical properties of the catalytic material are often neglected, even at elevated temperatures. An example is the three-way catalyst (TWC), used for treatment of exhaust gases from combustion engines operating at several hundred degrees Celsius. LÄS MER