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2017-09-10
11:29
OpenAccess [FZJ-2017-03688] Journal Article
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Hydrostatic pressure effects on the static magnetism in Eu(Fe$_{0.925}$Co$_{0.075}$)$_{2}$As$_{2}$
ddc:000
EuFe2As2-based iron pnictides are quite interesting compounds, due to the two magnetic sublattices in them and the tunability to superconductors by chemical doping or application of external pressure. The effects of hydrostatic pressure on the static magnetism in Eu(Fe0.925Co0.075)2As2 are investigated by complementary electrical resistivity, ac magnetic susceptibility and single-crystal neutron diffraction measurements. [...]

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2017-08-29
11:28
OpenAccess [FZJ-2017-05781] Journal Article
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New tools for grazing incidence neutron scattering experiments open perspectives to study nano-scale tribology mechanisms
ddc:530
Using grazing incidence scattering methods allows for depth profiling near surface structures very efficiently Dosch (1986). In parallel, layered structures have been used as resonators to enhance the wave field Kozhevnikov et al. [...]

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2017-08-01
11:28
OpenAccess [FZJ-2017-05329] Journal Article
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Polymer Chain Conformation and Dynamical Confinement in a Model One-Component Nanocomposite
ddc:550
We report a neutron-scattering investigation on the structure and dynamics of a single-component nanocomposite based on SiO2 particles that were grafted with polyisoprene chains at the entanglement limit. By skillful labeling, we access both the monomer density in the corona as well as the conformation of the grafted chains. [...]

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2017-01-10
16:19
[FZJ-2016-07285] Journal Article
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Studying Soft-matter and Biological Systems over a Wide Length-scale from Nanometer and Micrometer Sizes at the Small-angle Neutron Diffractometer KWS-2
ddc:570
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2016-11-30
16:20
OpenAccess [FZJ-2016-06902] Journal Article
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Nanoscale Motion of Soft Nanoparticles in Unentangled and Entangled Polymer Matrices
ddc:550
We have studied the motion of polyhedral oligomeric silsesquioxane (POSS) nanoparticles modified with poly(ethylene glycol) (PEG) arms immersed in PEG matrices of different molecular weight. Employing neutron spin echo spectroscopy in combination with pulsed field gradient (PFG) NMR we found the following. [...]

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2016-11-10
16:19
Embargoed OpenAccess [FZJ-2016-02235] Journal Article
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Sacrificial bonds enhance toughness of dual polybutadiene networks
ddc:540
A new dual network elastomer is developed that consists of polybutadiene crosslinked with both permanent and transient bonds. The transient network is formed by the association of urazole groups that are randomly attached to the polymer backbone [...]

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2016-11-08
16:19
OpenAccess [FZJ-2016-05846] Journal Article
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Structure and domain dynamics of human lactoferrin in solution and the influence of Fe(III)-ion ligand binding
ddc:570
BackgroundHuman lactoferrin is an iron-binding protein of the innate immune system consisting of two connected lobes, each with a binding site located in a cleft. The clefts in each lobe undergo a hinge movement from open to close when Fe3+ is present in the solution and can be bound. [...]

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2016-05-11
08:56
OpenAccess [FZJ-2016-02236] Journal Article
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Monomeric Amyloid Beta Peptide in Hexafluoroisopropanol Detected by Small Angle Neutron Scattering
PLoS one 11(2), e0150267 - (2016) [10.1371/journal.pone.0150267]
ddc:500
Small proteins like amyloid beta (Aβ) monomers are related to neurodegenerative disorders by aggregation to insoluble fibrils. Small angle neutron scattering (SANS) is a nondestructive method to observe the aggregation process in solution. [...]

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2016-05-11
08:56
OpenAccess [FZJ-2016-02131] Journal Article
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Fast antibody fragment motion: flexible linkers act as entropic spring
Scientific reports 6, 22148 - 1-13 (2016) [10.1038/srep22148]
ddc:000
A flexible linker region between three fragments allows antibodies to adjust their binding sites to an antigen or receptor. Using Neutron Spin Echo Spectroscopy we observed fragment motion on a timescale of 7 ns with motional amplitudes of about 1 nm relative to each other. [...]

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2016-03-11
09:41
[FZJ-2016-01863] Journal Article
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Photoactivation Reduces Side-Chain Dynamics of a LOV Photoreceptor
ddc:570
We used neutron-scattering experiments to probe the conformational dynamics of the light, oxygen, voltage (LOV) photoreceptor PpSB1-LOV from Pseudomonas putida in both the dark and light states. Global protein diffusion and internal macromolecular dynamics were measured using incoherent neutron time-of-flight and backscattering spectroscopy on the picosecond to nanosecond timescales. [...]

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