OpenAccess

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2021-09-18
11:28
OpenAccess [FZJ-2021-03346] Journal Article
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Distribution and orientation of nerve fibers and myelin assembly in a brain section retrieved by small-angle neutron scattering
The structural connectivity of the brain has been addressed by various imaging techniques such as diffusion weighted magnetic resonance imaging (DWMRI) or specific microscopic approaches based on histological staining or label-free using polarized light (e.g., three-dimensional Polarized Light Imaging (3D-PLI), Optical Coherence Tomography (OCT)). These methods are sensitive to different properties of the fiber enwrapping myelin sheaths i.e. [...]
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2021-09-18
11:28

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2021-09-18
11:28
OpenAccess [FZJ-2021-03224] Journal Article
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Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba 2 CoGe 2 O 7 under external magnetic fields
We report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energyinelastic neutron scattering. In-plane transverse (T1) spin-wave modes are highly dispersive along (h00) andrather flat but strong in intensity along (30l). [...]
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2021-09-14
11:28
OpenAccess [FZJ-2021-00903] Journal Article
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Polyethylene Oxide Hydrogels Crosslinked by Peroxide for the Controlled Release of Proteins
Macromol 1(1), 37-48 () [10.3390/macromol1010004]
Crosslinking of polyethylene oxide (PEO) using a peroxide in the melt is employed to synthesize soft hydrogels with the ability of controlled release of proteins. The viscoelastic properties of the swollen networks confirm the elastic nature of the synthesized material and they are in agreement with swelling characteristics [...]
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2021-08-05
11:28
OpenAccess [FZJ-2021-03148] Journal Article
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Separation of the inelastic and elastic scattering in time-of-flight mode on the pinhole small-angle neutron scattering diffractometer KWS-2
To study and control the incoherent inelastic background in small-angle neutron scattering, which makes a significant contribution to the detected scattering from hydrocarbon systems, the KWS-2 small-angle neutron scattering diffractometer operated by the Jülich Centre for Neutron Science (JCNS) at Heinz-Maier Leibnitz Zentrum (MLZ), Garching, Germany, was equipped with a secondary single-disc chopper that is placed in front of the sample stage. This makes it possible to record in time-of-flight mode the scattered neutrons in the high-Q regime of the instrument (i.e. [...]
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2021-08-05
11:28
OpenAccess [FZJ-2021-03126] Journal Article
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Comparison of the temperature- and pressure-dependent behavior of the crystal structure of CrAs
The crystal structure of CrAs was investigated using synchrotron X-ray single-crystal diffraction for separate dependences on temperature (30–400 K) and on pressure (0–9.46 GPa). The isosymmetrical magnetostructural phase transition at TN = 267 K can induce a change in the microstructure by twinning due to a crossing of the orthohexagonal setting of the unit-cell parameter ratio c/b. [...]
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2021-08-03
11:28
Embargoed OpenAccess [FZJ-2021-03150] Journal Article
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Evidence of anomalous conventional and spontaneous exchange bias, high coercivity in Fe doped NiCr2O4 spinel
Dalton transactions 49(14), 4502 - 4517 () [10.1039/D0DT00124D]
NiCr2−xFexO4 (x = 0 and 0.2) polycrystalline ceramics have been synthesized successfully through a simple co-precipitation technique to study the evolution of structural and magnetic properties by doping Fe. X-ray diffraction (XRD) reveals that the high-temperature cubic phase (space group Fd[3 with combining macron]m) observed at 320 K in bulk NiCr2O4 is stabilized at room temperature by decreasing the particle size to nanometer in x = 0 as well as after incorporating 20 at% Fe in the NiCr2O4 lattice. [...]

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2021-07-30
11:28
OpenAccess [FZJ-2021-03057] Journal Article
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Chain-End Effects on Supramolecular Poly(ethylene glycol) Polymers
Polymers 13(14), 2235 () [10.3390/polym13142235]
In this work we present a fundamental analysis based on small-angle scattering, linear rheology and differential scanning calorimetry (DSC) experiments of the role of different hydrogen bonding (H-bonding) types on the structure and dynamics of chain-end modified poly(ethylene glycol) (PEG) in bulk. As such bifunctional PEG with a molar mass below the entanglement mass Me is symmetrically end-functionalized with three different hydrogen bonding (H-bonding) groups: thymine-1-acetic acid (thy), diamino-triazine (dat) and 2-ureido-4[1H]-pyrimidinone (upy) [...]
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2021-07-30
11:28
Embargoed OpenAccess [FZJ-2021-03056] Journal Article
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Structural Organization of Cardiolipin-Containing Vesicles as Models of the Bacterial Cytoplasmic Membrane
Langmuir 37(28), 8508 - 8516 () [10.1021/acs.langmuir.1c00981]
The bacterial cytoplasmic membrane is the innermost bacterial membrane and is mainly composed of three different phospholipid species, i.e., phosphoethanolamine (PE), phosphoglycerol (PG), and cardiolipin (CL). In particular, PG and CL are responsible for the negative charge of the membrane and are often the targets of cationic antimicrobial agents. [...]

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2021-07-30
11:28
OpenAccess [FZJ-2020-02672] Journal Article
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Cold and distant: structural features of the nucleoprotein complex of a cold-adapted influenza A virus strain
Two influenza A nucleoprotein variants (wild-type: G102R; and mutant: G102R and E292G) were studied with regard to macro-molecular interactions in oligomeric form (24-mers). The E292G mutation has been previously shown to provide cold adaptation. [...]
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