Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"relaxation experiments"”.
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Markov state modeling of binding and conformational changes of proteins
… system Mdm2-PMI and by analysis of data from relaxation experiments. The central task it to uncover the binding mechanism, which is described by the sequence of (partial) binding events and conformational change events including their probabilities. In the simplest case, the binding mechanism …
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Viscoelastic characterization of polyurea based polymers
… Based on results from confined compression experiments on these materials, TRI – 25 was selected as the best alternative material on account of its good flow characteristics at lower stresses. The constitutive behavior of this formulation has been determined using confined relaxation and …
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Entwicklung und Anwendung mobiler NMR-Sonden
… had been performed successfully. The experiments prove that the radial measure concept of the NMR endoscope is suitable to perform radial imaging, space resolved spectroscopy and relaxation measurements. In the second part the feasibilities of the endoscope has been examined to work as …
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Aspects of Wood Adhesion: Applications of 13C CP/MAS NMR and Fracture Testing
… PF and pMDI and wood was probed using NMR relaxation experiments. Evidence was shown to suggest the formation of an interpenetrating polymer network (IPN) morphology existing at both types of wood-resin interphases. The formation of the IPN morphology was strongly influenced by resin …
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Towards atomistic characterization of blood coagulation proteins by NMR spectroscopy
… intraresidue multidimensional solid-state NMR experiments have been acquired in order to complete the chemical shift assignments of microcrystalline sTF and compare the effects of different precipitation agents on chemical shifts, focusing on the loop residues missing in the X-ray crystal …
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Self-assembly of helical ribbons from chiral amphiphiles
… the importance of these structures, a series of experiments to probe the kinetics and energetics of helix formation has been performed. Theoretical interpretation and experimental measurements of helix elastic properties have also been performed. It was shown that the formation of helical ribbons …
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Relaxation mechanism in methyl stearate monolayer films at the air/water interface
… film collapse took place. Surface pressure relaxation was then followed as a function of time. Investigation involving the effects of film compression beyond the collapse pressure revealed an important process involved in the surface pressure relaxation mechanism. When the monolayer is …
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Determination of Biomolecular Interdomain Motions using Nuclear Magnetic Resonance
… motions of two adjacent domains in SpA. NMR spin relaxation experiments identified a 6-residue flexible interdomain linker and interdomain motions. To quantify the anisotropy of the distribution of interdomain orientations, we measured residual dipolar couplings (RDCs) from the two domains with …
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Functional Roles of A1-adrenergic Receptors in the Bovine Inferior Alveolar Artery: Regulation of Contraction and Activation of Extracellular Signal Regulated Kinase
… was used to pre-contract rings sub-maximally for relaxation experiments. Concentrations of ACH of less than 3 pM caused relaxation of ring segments with an EC50 = 0.10 + 0.02 pM, while concentrations greater than 3 pM caused contraction. CGRP was a full agonist for vasodilation with an EC50 = 0.30 …
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Mechanical behavior of tissue simulants and soft tissues under extreme loading conditions
… in nature, atomic force microscopy enabled load relaxation experiments are utilized to develop approaches to distinguish between poroelastic and viscoelastic regimes, and to study how the anisotropy of the tissue structure affects elastic and transport properties, in order to inform the future …
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Membrane and membrane protein dynamics studied with time-resolved infrared spectroscopy
… or over a kinetic axis in transient relaxation experiments. The temporal information encoded by multidimensional IR spectroscopy and transient experiments also provides a route to studying the dynamics of membranes and membrane proteins over a range of timescales, from sub-picoseconds …
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Structural basis of membrane targeting and regulation of the innate immunity adaptor TIRAP by its phosphoinositide-binding motif
… located on the micellar surface. Nuclear spin relaxation experiments indicate that the two termini of TIRAP PBM become more ordered when bound to PIP, thus, we propose that the central helix in PBM is responsible for membrane insertion, whereas the two sets of basic residues interact with PIPs …
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Characterization of natural porous media by NMR and MRI techniques : high and low magnetic field studies for estimation of hydraulic properties
… different mixture of sand/clay) to determine the relaxation parameters in order to adapt optimal sequence and parameters for water imaging. Conventional imaging is mostly performed with superconducting high field scanners but low field scanners promise longer relaxation times and therefore smaller …
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Biophysical Analyses of Intermolecular Ion-Pairs in Protein-DNA Complexes
… the free and DNA-bound state of Anp through 15N relaxation experiments. We show that side chain mobility is retained for both Arg and Lys side chains that form an ion pair with the phosphate backbone. Second, we investigate the role of ion pair dynamics of the Antp homeodomain through the …
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Structure Property Relationships of Proton Exchange Membranes
… copolymers were characterized using DSC and NMR relaxation techniques. At similar ionic contents, the free water concentration increased with increasing block lengths. The distribution of the states of water in the copolymers correlates to transport properties. This knowledge, coupled with the …
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Poly(L-Lactic Acid) Langmuir Monolayers at the Air/Water Interface and Langmuir-Blodgett Films on Solid Substrates: Phase Behavior, Surface Morphology, and Crystallinity
… lamellae during constant compression rate experiments, and a modified nucleation and growth mechanism during isobaric area relaxation experiments. PLLA LB-films prepared in different Langmuir film phases at temperatures below Tc all contain lamellae with different surface roughnesses and …
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Phase Behavior of Poly(Caprolactone) Based Polymer Blends As Langmuir Films at the Air/Water Interface
… are ~ 7-8 nm. BAM studies during isobaric area relaxation experiments at different surface pressure reveal morphological transitions from highly branched dendrites, to six-arm dendrites, four-arm dendrites, seaweedlike crystals, and distorted rectangular crystals. In contrast, PCL …
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Cartilage stress relaxation induced by intra-tissue transport of cationic nanoparticles : implications for post-traumatic osteoarthritis drug delivery
… cartilage explants in vitro, mechanical stress relaxation experiments were performed at two ionic strengths (low = 0.015 M NaCl and physiologic = 0.15 M NaCl) in the presence and absence of added avidin. After an initial set of compressive strain ramps and relaxations, 100 [mu]M avidin was added …
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Characterizing Plastic Deformation Mechanisms in Metal Thin Films using In Situ Transmission Electron Microscopy Nanomechanics
… electron microscopy (TEM) nanomechanical experiments. This technique allows for the simultaneous observation of the active deformation mechanisms and quantification of the mechanical properties during monotonic and stress-relaxation experiments. Experiments were performed on NC Al and UFG …
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Synthesis and characterization of fluorinated cellulose derivatives
… solution analysis, and l3C spin-lattice relaxation experiments were used to compare the rod-like and coil-like behavior of the fluorobenzyl cellulose and amylose. Polycaprolactone, PCL, was blended with tri-O-benzylated cellulose with different degrees of fluorination. PCL was found to be …
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