cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2420319-1
title: Growth and structure of self-assembled metal-containing water-soluble nanotubes

description: We propose a SANS experiment to (i) gain structural insight on nanotubes formed by water soluble anthracene derivatives and (ii) using time-resolved experiments, investigate their formation both in the presence and absence of metal salts (Cu2+, Ag+). Metal incorporation yields a material that resembles a coaxial wire (with inner metal content and pi-pi interactions through the stacked anthracene units in the nanotube shell). These materials are being explored for use as wires and in catalysis. SANS is required to facilitate the global fitting of multiply contrasted datasets necessary to build up a detailed structural picture of these complex assemblies. While the experiment could run on any TS2 beamline, SANS2D is preferred, as these are fairly dilute systems. The lower background of SANS2D and use of the front detector allows the feature-filled scattering at mid-high Q to be better visualised.
DOI: 10.5286/isis.e.rb2420521
title: Intermediate Range Order Across the Liquid-Liquid Phase Separation in Li-NH3-MeNH2

description: We request 2 days on SANDALS to examine the existence and extent of intermediate range ordering in a phase-separated liquid-liquid system, Li-ND3-CD3ND2. This experiment is coupled to a VESUVIO proposal examining molecular distribution in the same system.
DOI: 10.3535/pdg-wbc-4jm
title: Thuidiopsis chilensis (Mitt.) Broth.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2400063-1
title: An in vitro gram-negative double bilayer envelope mimetic

description: In gram-negative bacteria the envelope is a complex, essential, tripartite structure formed by two membranes sandwiching a peptidoglycan layer that together maintain the integrity and shape of the cell. While the structure and composition of the bacterial cell envelope has been known for a number of years, emulating this system accurately in vitro has remained impossible with models either representing the outer membrane (OM) or the inner membrane (IM) solely. For the study of trans-envelope systems, however, no in vitro system is readily available. This therefore limits the study of transport processes between membranes, in particular the study of the biogenic transport processes responsible for OM formation. These processes utilise sophisticated and complex multi-protein machineries that have components in both membranes and in some cases span and tether the membranes together. One such system, the PqiABC complex, implicated in phospholipid transport, spans the periplasm with components in both the inner and outer membranes, tethering the two membranes together. Here we request rapid access to complete our studies utilising this trans-envelope complex as a scaffold to create a planar double membrane architecture of the gram-negative membrane on top of a solid support, providing a unique gram-negative envelope mimetic to probe envelope biology, significantly increasing the sophistication and accuracy of envelope based in vitro studies.
DOI: 10.5286/isis.e.rb2420305
title: Local Distortions in Isovalent Doped LaNbO4

description: This study will use total neutron scatting methods to characterise the local structure of oxide ion conductions of the type La1-xVxO4. Rietveld analysis of constant wavelength neutron diffraction data reveals a surprising volume increase upon V substitution despite its smaller ionic radius, which, from XAS measurements, remains +5 across the series. Bond Valence Sum calculations using the average structure reveal considerable underbonding of the V cations. Nb L-edge XAS measurements suggest a gradual disordering of the Nb cations, accompanied by a change in coordination. This work will shed light on the complex interplay between composition, structure, and bonding in these oxides.
DOI: 10.5286/isis.e.rb2420305-1
title: Local Distortions in Isovalent Doped LaNbO4

description: This study will use total neutron scatting methods to characterise the local structure of oxide ion conductions of the type La1-xVxO4. Rietveld analysis of constant wavelength neutron diffraction data reveals a surprising volume increase upon V substitution despite its smaller ionic radius, which, from XAS measurements, remains +5 across the series. Bond Valence Sum calculations using the average structure reveal considerable underbonding of the V cations. Nb L-edge XAS measurements suggest a gradual disordering of the Nb cations, accompanied by a change in coordination. This work will shed light on the complex interplay between composition, structure, and bonding in these oxides.
DOI: 10.34816/ifao.archives.232907
title: SAQQARA_nb_1994_05960

description: Référence : nb_1994_05960<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/kwc-j27-5b3
title: Cephaloziella verrucosa Steph.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/wn7-5dq-4we
title: Drimys andina (Reiche) R. A. Rodr. & Quezada

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2400063
title: An in vitro gram-negative double bilayer envelope mimetic

description: In gram-negative bacteria the envelope is a complex, essential, tripartite structure formed by two membranes sandwiching a peptidoglycan layer that together maintain the integrity and shape of the cell. While the structure and composition of the bacterial cell envelope has been known for a number of years, emulating this system accurately in vitro has remained impossible with models either representing the outer membrane (OM) or the inner membrane (IM) solely. For the study of trans-envelope systems, however, no in vitro system is readily available. This therefore limits the study of transport processes between membranes, in particular the study of the biogenic transport processes responsible for OM formation. These processes utilise sophisticated and complex multi-protein machineries that have components in both membranes and in some cases span and tether the membranes together. One such system, the PqiABC complex, implicated in phospholipid transport, spans the periplasm with components in both the inner and outer membranes, tethering the two membranes together. Here we request rapid access to complete our studies utilising this trans-envelope complex as a scaffold to create a planar double membrane architecture of the gram-negative membrane on top of a solid support, providing a unique gram-negative envelope mimetic to probe envelope biology, significantly increasing the sophistication and accuracy of envelope based in vitro studies.
DOI: 10.5286/isis.e.rb2510069
title: Search for the magnetic structure of a distorted Kagome CrNiAs

description: Kagome metals, with a frustrated sub-lattice, are ideal hosts for many exquisite quantum phenomena. Taking the kagome-metal Co3Sn2S2 for example, the nodal ring transforms into Weyl nodes under strong spin-orbit coupling (SOC), with intrinsic Berry curvature and ferromagnetic order contributing to a giant anomalous Hall effect. We recently synthesized a distorted Kagome single crystal CrNiAs with an anomalous Hall effect, similar to the Co3Sn2S2 compound. The ternary arsenide CrNiAs is a ferromagnet with the Curie temperature, Tc, reported to be 171.9 K, and the magnetic moment per formula unit reported to be 2.42 μB in powder. The hyperfine magnetic moment field at 61Ni nuclei implies that the Ni atoms carry a magnetic moment of 0.15(3) μB, and the moment carried by the Cr atoms is 0.95(6) μB. From powder neutron diffraction experiments, the compound is ferromagnetic mainly from the Cr moment of 1.25(5) μB in the 110-182 K. Below 110 K, it reveals typical satellite reflections whose propagation vector is 0.228 c*. The behavior of the anomalous Hall effect with temperature is the same as that of the moment. So measuring the magnetic structure of CrNiAs is crucial to explain its anomalous Hall effect. We have already prepared large crystals sized up to 3 mm. We propose to do neutron Laue diffraction at 4 K 100 K, and 200 K (reference point) using the top-loading CCR at the single crystal diffractometer SXD. The measurements will take about 5 days.
DOI: 10.5286/isis.e.rb2510069-1
title: Search for the magnetic structure of a distorted Kagome CrNiAs

description: Kagome metals, with a frustrated sub-lattice, are ideal hosts for many exquisite quantum phenomena. Taking the kagome-metal Co3Sn2S2 for example, the nodal ring transforms into Weyl nodes under strong spin-orbit coupling (SOC), with intrinsic Berry curvature and ferromagnetic order contributing to a giant anomalous Hall effect. We recently synthesized a distorted Kagome single crystal CrNiAs with an anomalous Hall effect, similar to the Co3Sn2S2 compound. The ternary arsenide CrNiAs is a ferromagnet with the Curie temperature, Tc, reported to be 171.9 K, and the magnetic moment per formula unit reported to be 2.42 μB in powder. The hyperfine magnetic moment field at 61Ni nuclei implies that the Ni atoms carry a magnetic moment of 0.15(3) μB, and the moment carried by the Cr atoms is 0.95(6) μB. From powder neutron diffraction experiments, the compound is ferromagnetic mainly from the Cr moment of 1.25(5) μB in the 110-182 K. Below 110 K, it reveals typical satellite reflections whose propagation vector is 0.228 c*. The behavior of the anomalous Hall effect with temperature is the same as that of the moment. So measuring the magnetic structure of CrNiAs is crucial to explain its anomalous Hall effect. We have already prepared large crystals sized up to 3 mm. We propose to do neutron Laue diffraction at 4 K 100 K, and 200 K (reference point) using the top-loading CCR at the single crystal diffractometer SXD. The measurements will take about 5 days.
DOI: 10.3535/4gt-55e-lkc
title: Gleditsia triacanthos L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/m0k-8qz-2zt
title: Gleditsia aquatica Marshall

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510159-1
title: Carrier lifetime in high efficiency silicon solar cells for space applications using temperature-dependent photoexcited muon spin spectroscopy

description: Silicon solar cells are widely used in space applications due to their cost-effectiveness, but their performance at extreme temperatures requires further study. This proposal aims to investigate temperature-dependent carrier lifetime in high-efficiency silicon solar cells using photo-µSR. Photo-µSR offers a unique advantage by measuring carrier lifetimes through metal contact structures and at various depths, making it ideal for studying completed solar cells. We will focus on two leading technologies: Tunnel oxide passivated contact (TOPCon) and silicon heterojunction (SHJ) solar cells. By analysing these cells across a temperature range from 77 K to 400 K, we aim to explore the underlying recombination mechanisms such as the impact of carrier freeze-out at low temperatures and the role of un-ionised dopants acting as recombination centre. Our previous beamtime demonstrated the effectiveness of photo-µSR in completed solar cells, which will serve as a foundation for this study. The findings will advance the development of more efficient solar cells for space applications and further extending the application of photo-µSR to other semiconductor devices.
DOI: 10.5286/isis.e.rb2510569
title: Investigating the Structural Dynamics and Interactions of S100A9 and Alpha-Synuclein using SANS

description: S100A9 is a pro-inflammatory, calcium binding protein that is a key inflammatory marker within the brain. Elevated levels of S100A9 have been shown to be linked with aging and the onset of neurodegenerative conditions including Alzheimer's and Parkinson's Disease. S100A9 is intrinsically amyloidogenic and readily forms amyloid fibrils. Interestingly though its presence also promotes the onset of alpha-synuclein deposition, a hallmark for Parkinson's Disease. Here SANS will be used to study the interaction between S100A9 and alpha-synuclein to determine how S100A9 promotes alpha-synuclein aggression and influences the conformational state it adopts, a property recently shown to influence the onset and progression of pathology. This data will complement site specific data obtained from solid-state NMR to provide insights into how this neuroinflammatory process could be targeted as a novel site for therapeutic intervention.
DOI: 10.5286/isis.e.rb2510569-1
title: Investigating the Structural Dynamics and Interactions of S100A9 and Alpha-Synuclein using SANS

description: S100A9 is a pro-inflammatory, calcium binding protein that is a key inflammatory marker within the brain. Elevated levels of S100A9 have been shown to be linked with aging and the onset of neurodegenerative conditions including Alzheimer's and Parkinson's Disease. S100A9 is intrinsically amyloidogenic and readily forms amyloid fibrils. Interestingly though its presence also promotes the onset of alpha-synuclein deposition, a hallmark for Parkinson's Disease. Here SANS will be used to study the interaction between S100A9 and alpha-synuclein to determine how S100A9 promotes alpha-synuclein aggression and influences the conformational state it adopts, a property recently shown to influence the onset and progression of pathology. This data will complement site specific data obtained from solid-state NMR to provide insights into how this neuroinflammatory process could be targeted as a novel site for therapeutic intervention.
DOI: 10.34816/ifao.archives.232908
title: SAQQARA_nb_1994_05961

description: Référence : nb_1994_05961<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/6z0-w9v-ec0
title: Drimys andina (Reiche) R. A. Rodr. & Quezada

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/egc-84w-3t0
title: Drimys andina (Reiche) R. A. Rodr. & Quezada

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510011
title: Understanding the Nature of Magnetic and Structural Transitions in Double Perovskite (Ca0.5Mn1.5)MnWO6

description: Materials that have ordered electric dipoles and magnetic spins are in general called multiferroics. After intensive studies, a general classification was introduced with type-I and type-II multiferroics. We have recently observed an interesting behavior in the double perovskite (Ca0.5Mn1.5)MnWO6 (Chem. Mater. 2024, 36, 7604), where features of type-I and type-II multiferroics are combined. We propose neutron diffraction experiments to determine magnetic structures of (Ca0.5Mn1.5)MnWO6 to understand the nature of magnetodielectric behavior at TN, and to determine temperature evolution of structural parameters to understand the Curie-Weiss behavior of dielectric constant in a wide temperature range as it is expected that the presence of small Mn2+ cations at large A perovskite sites can contribute to its unusual behavior of dielectric constant. Understanding the exact nature of magnetic orders as a function of temperature will allow us to unravel the microscopic physics at play in this example of perovskite-related materials.
DOI: 10.5286/isis.e.rb2510011-1
title: Understanding the Nature of Magnetic and Structural Transitions in Double Perovskite (Ca0.5Mn1.5)MnWO6

description: Materials that have ordered electric dipoles and magnetic spins are in general called multiferroics. After intensive studies, a general classification was introduced with type-I and type-II multiferroics. We have recently observed an interesting behavior in the double perovskite (Ca0.5Mn1.5)MnWO6 (Chem. Mater. 2024, 36, 7604), where features of type-I and type-II multiferroics are combined. We propose neutron diffraction experiments to determine magnetic structures of (Ca0.5Mn1.5)MnWO6 to understand the nature of magnetodielectric behavior at TN, and to determine temperature evolution of structural parameters to understand the Curie-Weiss behavior of dielectric constant in a wide temperature range as it is expected that the presence of small Mn2+ cations at large A perovskite sites can contribute to its unusual behavior of dielectric constant. Understanding the exact nature of magnetic orders as a function of temperature will allow us to unravel the microscopic physics at play in this example of perovskite-related materials.
DOI: 10.5286/isis.e.rb2510159
title: Carrier lifetime in high efficiency silicon solar cells for space applications using temperature-dependent photoexcited muon spin spectroscopy

description: Silicon solar cells are widely used in space applications due to their cost-effectiveness, but their performance at extreme temperatures requires further study. This proposal aims to investigate temperature-dependent carrier lifetime in high-efficiency silicon solar cells using photo-µSR. Photo-µSR offers a unique advantage by measuring carrier lifetimes through metal contact structures and at various depths, making it ideal for studying completed solar cells. We will focus on two leading technologies: Tunnel oxide passivated contact (TOPCon) and silicon heterojunction (SHJ) solar cells. By analysing these cells across a temperature range from 77 K to 400 K, we aim to explore the underlying recombination mechanisms such as the impact of carrier freeze-out at low temperatures and the role of un-ionised dopants acting as recombination centre. Our previous beamtime demonstrated the effectiveness of photo-µSR in completed solar cells, which will serve as a foundation for this study. The findings will advance the development of more efficient solar cells for space applications and further extending the application of photo-µSR to other semiconductor devices.
DOI: 10.21233/n3pj61
title: Pelly Bay pollen surface sample dataset

description: Raw data for the Pelly Bay pollen surface sample dataset submitted to the Neotoma Paleoecology Database. Data is available through the landing page in JSON format. The landing page referenced by the DOI also contains links to publications and a map-based viewer for the dataset. The Neotoma Paleoecology Database maintains a homepage at https://www.neotomadb.org.
DOI: 10.3535/eqw-2lg-y0g
title: Cuscuta glomerata Choisy

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/rh9-ksj-p4c
title: Drimys winteri J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510019
title: Investigation of the magnetic structure of the magnetic Weyl heavy fermion,CeBi2, using single-crystal neutron diffraction

description: Strongly correlated systems, due to entanglement among different interactions, often exhibit exotic and fascinating physics such as heavy fermion behaviour, complex magnetic ordering, or unconventional superconductivity. Due to strong spin-orbit coupling in these materials, topological surface states (TSS) with an inverted band gap are found. The prominent band features of TSS predicted and experimentally realised include non-trivial linearly dispersive Dirac-cones and Weyl fermions. Recently CeBi2 was found to demonstrate heavy fermion Kondo-type behaviour. It undergoes a transition to a complex antiferromagnetic ground state at TN = 3 K, and on the application of a magnetic field, a ferromagnetic-like state appears. In addition, the magneto-resistance behaviour of CeBi2 suggests the existence of non-trivial TSS. However, a previous neutron powder diffraction study at 1.6 K on D20 at ILL of CeBi2 did not reveal any clear sign of magnetic Bragg peaks. So far, the magnetic properties of this Weyl semimetal have not been explored by single crystal neutron diffraction. Here we propose to resolve the antiferromagnetic structure of CeBi2 by single-crystal neutron diffraction experiments using the WISH diffractometer.
DOI: 10.5286/isis.e.rb2510019-1
title: Investigation of the magnetic structure of the magnetic Weyl heavy fermion,CeBi2, using single-crystal neutron diffraction

description: Strongly correlated systems, due to entanglement among different interactions, often exhibit exotic and fascinating physics such as heavy fermion behaviour, complex magnetic ordering, or unconventional superconductivity. Due to strong spin-orbit coupling in these materials, topological surface states (TSS) with an inverted band gap are found. The prominent band features of TSS predicted and experimentally realised include non-trivial linearly dispersive Dirac-cones and Weyl fermions. Recently CeBi2 was found to demonstrate heavy fermion Kondo-type behaviour. It undergoes a transition to a complex antiferromagnetic ground state at TN = 3 K, and on the application of a magnetic field, a ferromagnetic-like state appears. In addition, the magneto-resistance behaviour of CeBi2 suggests the existence of non-trivial TSS. However, a previous neutron powder diffraction study at 1.6 K on D20 at ILL of CeBi2 did not reveal any clear sign of magnetic Bragg peaks. So far, the magnetic properties of this Weyl semimetal have not been explored by single crystal neutron diffraction. Here we propose to resolve the antiferromagnetic structure of CeBi2 by single-crystal neutron diffraction experiments using the WISH diffractometer.
DOI: 10.34816/ifao.archives.232909
title: SAQQARA_nb_1994_05962

description: Référence : nb_1994_05962<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/gzq-3xw-p4d
title: Drimys winteri J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510412
title: Determining crystalline phases formed by iron and sulphur in wood samples from ancient waterlogged shipwrecks through neutron diffraction

description: This proposal focuses on the treatment of degraded wood from ancient waterlogged shipwrecks, damaged by the formation of acid precursors such as pyrite due to anaerobic bacterial activity. These compounds can oxidize, producing sulfuric acid, which further degrades the wood. To counteract this, we are exploring the use of Calcium Hydroxide Nanoparticles (CH-NPs) for their deacidifying and stabilizing properties, aiming to neutralize acidic conditions and prevent further damage. The main objective is to assess the distribution and quantity of iron and sulfur compounds within the wood, which is essential for optimizing the treatment. Neutron diffraction, a non-destructive technique, plays a key role in this study. It allows the identification and quantification of crystalline phases such as pyrite, greigite, and marcasite, providing information about their depth and extent. This technique enables internal structural analysis without altering the samples. We will perform measurements on three wood samples, both before and after artificial acidification, to monitor changes in sulfur-containing phases and their transformation into sulfuric acid. This will help us trace the penetration of acidic precursors and determine the optimal depth for nanoparticle treatment. Understanding the distribution of these compounds will enhance the effectiveness of the treatment, ensuring the long-term preservation of the artefacts.