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Showing 1 to 18 of 18 for “"Linear dichroism."”.
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Orientation of adsorbate-adsorbate complexes using a novel waveguide linear dichroism technique
Made available in DSpace on 2011-05-07T12:30:00Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9210774.pdf: 9143067 bytes, checksum: 78808011bb0bbcb2817b90e5a0e28b5a (MD5) Previous issue date: 1991
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Pigment orientation changes detected by low temperature linear dichroism spectroscopy: cold-hardening transition in phycobilisome-containing organisms
Low temperature (77K) linear dichroism spectroscopy was used to characterize pigment orientation changes accompanying the light state transition in the cyanobacterium, Synechococcus sp. pee 6301, and cold-hardening in winter rye (Secale cereale L. cv. Puma). Samples were oriented for spectroscopy …
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Supramolecular Architectures in Molecular Medicine: Visualizing and Manipulating the Structure of Protein-Lipid Surfaces
… A computational study of the dependence of linear dichroism on the distribution of protein orientation angle has revealed a constrained degenerate solution, which has impact on all attempts to describe protein orientation with this technique.
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Effects of Immobilization Matrices and Protein Orientation on Biomolecular Recognition at Solid-Liquid Interfaces
… b5 was well controlled as verified with linear dichroism measurements. The orientational dependence of the protein electrostatic surface potentials was observed by direct force measurement. The impact of immobilized cytochrome b5 orientation on the forces mediating the cytochrome …
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Systematic Investigation of Intermolecular Interactions in NEXAFS Spectroscopy
… n-alkanes crystalline polymorphs. However, linear dichroism effects were observed for these different n-alkane crystalline polymorphs. For a given a crystal structure (orthorhombic or monoclinic), the relative intensities of the two C-H peaks (287-288 eV) and the energy of the C-H band …
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Metallo-Supramolecular complexes and their interactions with biomolecules and cells
… complexes with B-DNA is probed by circular and linear dichroism and gel electrophoresis. The study confirms that the complexes bind to DNA, causing it to kink and bend. Chapter 5 presents the synthesis and crystallographic characterisation of four new silver(I) supramolecular polymers. In …
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Synthesis and modification of pamam dendrimers as histone replacement molecules
… by analysing dendrimer-DNA compaction using linear dichroism, dynamic light scattering and competitive binding of ethidium. Experiments designed to investigate modified dendrimer-lipid interactions are also discussed and the results of these are compared to molecular dynamic simulations. The …
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Optoelectronic properties and energy transport processes in cylindrical J-aggregates
… nanotubes and bundles of agglomerated nanotubes. Linear dichroism spectroscopy of flow-aligned nanotubes is used to generate the first quantitative, polarized model for the complicated C8S3 nanotube excitonic absorption spectrum that is consistent with theoretical predictions. The C8S3 J-aggregate …
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Potential-Dependent-Adsorption and Reorientation Responses Associated With a Phospholipid Monolayer at the Water /Dichloroethane Interface
… potentials. Concurrent fluorescence detected linear dichroism (FDLD) measurements found that I reorients towards the interface normal during a positive potential sweep. Because the total interfacial population decreases at these potentials, this behavior cannot be ascribed to a simple …
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Ensemble and single molecules fluorescence studies of polymers
… analyzed and the correlation function of reduced linear dichroism is fit by a stretched exponential function. The fitting results suggest that non-exponential decay of correlation function. However, more rigorous study is needed because of the intrinsic statistical error of limited experimental …
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Steady-State and Ultrafast Fluorescence Depolarisation in Rigid-Rod Conjugated Polymers
… such elongation can only be electronic. Linear dichroism results obtained for all the polymers has shown the angle between the absorption transition dipole moment and the molecular backbone is large and that the emission transition dipole moment is aligned with the backbone. “Off-chain” …
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Crystallization behavior and morphological features of two LARC polyimides and local orientation studies of two semicrystalline model composites
… Results were obtained utilizing linear dichroism for orientation within spherulitic and transcrystalline superstructure in poly(glycolide co-lactide) and isotactic polypropylene. An increase in orientation on an absolute basis as a function of position was successfully measured. …
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I, Crystallization and morphological studies of ICI's intermediate temperature semicrystalline (ITX) polymer and, II, The influence of deformation (shear strain) during bond formation on adhesive bond strength
… sheared bonds were weaker than control bonds. Linear dichroism was used to quantify the level of orientation present within similarly prepared adhesive films. The technique indicated that there was no measurable preferential orientation in either adhesive.
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Porphyrins as second order nonlinear optical materials
… one to four. In addition, based on UV-visible linear dichroism, all of the porphyrin films possess C$\rm\sb{\infty v}$ symmetry and adopt a tilt angle, $\theta$, of about 33$\sp\circ$ with respect to the fused quartz substrate. The proposed fixed orientation model suggests that the …
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Supramolecular Architectures in Molecular Medicine: Visualizing and Manipulating the Structure of Protein-Lipid Surfaces
… A computational study of the dependence of linear dichroism on the distribution of protein orientation angle has revealed a constrained degenerate solution, which has impact on ail attempts to describe protein orientation with this technique.
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Optical and core-level X-ray spectroscopy of correlated two-dimensional materials
… of the orbital degrees of freedom using X-ray linear dichroism with in-situ uniaxial strain tuning, electronic transport measurements and structural diffraction. We observe a lattice-independent orbital polarization acting as the primary nematic order parameter. This resolves the orbital origin …
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Excited state charge redistribution and dynamics of flavins, flavorproteins, and their cofactors
… are in agreement with previously a published linear dichroism experiment that found the absorption spectrum of flavins in this redox state arises from two distinct electonic transitions in the visible/near-ultraviolet spectral range, a fact that has not been incorporated into the analysis of …
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Probing light-matter interactions with differential polarizations: From chiral nanostructures to molecular sensing
… it demonstrates the fundamental understanding of dichroism at the single‑particle level while unlocking its potential for improved detection of chiral biomolecules. Using DNA-origami templated gold nanorod dimers, we apply single-particle circular differential scattering to probe nanoscale …