cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2410553-1
title: Molecular investigation of cross-linking and thermo-gelling of a novel collagen-based hydrogel

description: This project aims to study the molecular mechanisms behind curing, shear-thinning, and self-healing properties of an injectable gel designed to provide mechanical support to the damaged region of the heart after heart-attack. Myocardial infarction, commonly known as heart-attack, happens due to occlusion of an artery leading to lack of oxygen and nutrient supply resulting in death of cardiac cells responsible for beating. As a result, heart´s ability to pump blood diminishes resulting in enlargement of the heart due to accumulated blood in the chamber and the left ventricular (LV) wall began to thin. Collagen based injectable gels were used before to provide mechanical support to the LV wall or to deliver therapeutic cells or drugs. However, these gels were formed through collagen physical assembly. Our solution is a chemically crosslinked collagen gel which is self-healing. This gel can provide mechanical support as well as suitable for delivery of cells or drugs. Understanding the molecular-level mechanisms of self-healing could help us develop a more controlled gel system. To achieve this, we propose using SANS experiments to observe the real-time formation of structural elements during the gel curing process. These gels remain fully transparent throughout the gelling process making SANS an indispensable technique, as it is challenging to do so using other available scattering methods.
DOI: 10.5286/isis.e.rb2410734-1
title: Spin textures in BiFeO3-based superlattices

description: An exciting development in the domain of ferroelectricity is the appearance of skyrmionic-like polar states. This has been recently observed in ferroic based superlattices (SLs). Such polar instability has also been demonstrated in BiFeO3 (BFO)-based SLs, including through our work. Following our recent success in probing (BFO) films on various substrates using neutron diffraction on WISH, we propose to study a series of BFO- SLs where changing the repeating pattern and thickness of the two materials (one of which is BFO, the other LaFeO3) provides a new control handle on confinement, strain and competing interactions to tune the magnetic and ferroelectric properties in BFO, the archetypical multiferroic oxide. We have produced high quality samples which should allow us to explore crossover behaviour between cycloidal and antiferromagnetic states and determine which polar and spin instabilities lead to exotic polar and/or magnetic textures. A test conducted on one such SL at the end of the series confirms the samples are suitable for WISH. Neutron diffraction is the only way to unambiguously determine the magnetic structure in these exciting potentially technologically relevant SL systems.
DOI: 10.34816/ifao.archives.232761
title: SAQQARA_nb_1994_03255

description: Référence : nb_1994_03255<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/4fk-nnc-frq
title: Cladium mariscus (L.) Pohl

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/prd-ala-zm4
title: Caltha palustris L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410526
title: Determination of crystal electric field and Kondo energy scale in a new compound, Ce2Rh3Ga5 via inelastic neutron scattering

description: In cerium-based compounds, crystalline electric field (CEF) plays an influential role in addition to Ruderman-Kittel-Kasuya-Yosida (RKKY) and Kondo effect in deciding the nature of magnetic ordering by lifting the degeneracy of the ground state J multiplets. Therefore, one must know the crystal electric field scheme and the Kondo energy scale to understand such a new system entirely. In this case, where the Ce site has a less symmetric environment (orthorhombic structure), perturbation from CEF splits the J = 5/2 state into three doublets, i.e., two excited states. Here, inelastic neutron scattering serves as the best technique to determine both the excited CEF split states. Moreover, quasielastic linewidth in the INS experiment provides a way to verify the existence/non-existence of the Kondo energy scale. We propose to perform these measurements on a new cerium-based compound, Ce2Rh3Ga5, which crystallizes in an orthorhombic structure to obtain the information corresponding to both energy scales.
DOI: 10.5286/isis.e.rb2410526-1
title: Determination of crystal electric field and Kondo energy scale in a new compound, Ce2Rh3Ga5 via inelastic neutron scattering

description: In cerium-based compounds, crystalline electric field (CEF) plays an influential role in addition to Ruderman-Kittel-Kasuya-Yosida (RKKY) and Kondo effect in deciding the nature of magnetic ordering by lifting the degeneracy of the ground state J multiplets. Therefore, one must know the crystal electric field scheme and the Kondo energy scale to understand such a new system entirely. In this case, where the Ce site has a less symmetric environment (orthorhombic structure), perturbation from CEF splits the J = 5/2 state into three doublets, i.e., two excited states. Here, inelastic neutron scattering serves as the best technique to determine both the excited CEF split states. Moreover, quasielastic linewidth in the INS experiment provides a way to verify the existence/non-existence of the Kondo energy scale. We propose to perform these measurements on a new cerium-based compound, Ce2Rh3Ga5, which crystallizes in an orthorhombic structure to obtain the information corresponding to both energy scales.
DOI: 10.5286/isis.e.rb2410734
title: Spin textures in BiFeO3-based superlattices

description: An exciting development in the domain of ferroelectricity is the appearance of skyrmionic-like polar states. This has been recently observed in ferroic based superlattices (SLs). Such polar instability has also been demonstrated in BiFeO3 (BFO)-based SLs, including through our work. Following our recent success in probing (BFO) films on various substrates using neutron diffraction on WISH, we propose to study a series of BFO- SLs where changing the repeating pattern and thickness of the two materials (one of which is BFO, the other LaFeO3) provides a new control handle on confinement, strain and competing interactions to tune the magnetic and ferroelectric properties in BFO, the archetypical multiferroic oxide. We have produced high quality samples which should allow us to explore crossover behaviour between cycloidal and antiferromagnetic states and determine which polar and spin instabilities lead to exotic polar and/or magnetic textures. A test conducted on one such SL at the end of the series confirms the samples are suitable for WISH. Neutron diffraction is the only way to unambiguously determine the magnetic structure in these exciting potentially technologically relevant SL systems.
DOI: 10.3535/7r9-t7n-mdf
title: Carex panicea L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lz5-tjr-1h0
title: Solidago virgaurea L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410102
title: Carbon-dioxide capture by hydroquinone clathrates

description: Organic clathrates are cheap and ideal candidate materials for the capture and storage of carbon dioxide, owing to a large and particularly stable porous structure combined to a high selectivity toward this molecule. Recent results in the synthesis of guest-free beta-hydroquinone phase could pave the way to the development of this class of compounds in real applications. Nonetheless, a full understanding of the CO2 capture process is still pending. This proposal seeks to investigate, in-situ, the adsorption and desorption mechanism of this fascinating crystal upon variation of pressure and temperature. To this end, we would need SXD fitted with the CCR and gas-pressure cell to perform experiments on single-crystals of beta-hydroquinone. This results, in combination with other computational and scattering techniques, will give us full access to the structure and its deformation as the CO2 is captured by the clathrate.
DOI: 10.5286/isis.e.rb2410102-1
title: Carbon-dioxide capture by hydroquinone clathrates

description: Organic clathrates are cheap and ideal candidate materials for the capture and storage of carbon dioxide, owing to a large and particularly stable porous structure combined to a high selectivity toward this molecule. Recent results in the synthesis of guest-free beta-hydroquinone phase could pave the way to the development of this class of compounds in real applications. Nonetheless, a full understanding of the CO2 capture process is still pending. This proposal seeks to investigate, in-situ, the adsorption and desorption mechanism of this fascinating crystal upon variation of pressure and temperature. To this end, we would need SXD fitted with the CCR and gas-pressure cell to perform experiments on single-crystals of beta-hydroquinone. This results, in combination with other computational and scattering techniques, will give us full access to the structure and its deformation as the CO2 is captured by the clathrate.
DOI: 10.5286/isis.e.rb2410236-2
title: Optimising Giant Spin Torques in Topological Insulator/Ferromagnet heterostructures

description: Exploiting topology in quantum matter offers unique possibilities to engineer materials at the nanoscale that can have transformative potential. Recognised in the 2016 Nobel prize for physics, topology is central to a number of contemporary topics in condensed matter physics. Here we combine two classes: topological insulators (TIs) and topologically protected skyrmions to search for an energy efficient method for computation and storage. This hybrid system has the potential to move information carrying skyrmions in a highly efficient manner as a result of the giant spin-orbit torques present in the system arising from the spin-momentum locked surface states in the TI. In this work we wish to understand the nanoscale magnetic structure in this system, in particular the interface between the TI and metallic multilayer and relate this to its functionality . We will combine the results with x-ray imaging and conventional magnetometry.
DOI: 10.34816/ifao.archives.232762
title: SAQQARA_nb_1994_03256

description: Référence : nb_1994_03256<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/j23-sve-6gk
title: Carex distans L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/y0k-tm9-xsm
title: Plantago uniflora L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410143-1
title: Inelastic Neutron Scattering Studies of Shastry-Sutherland Model System Tb2Be2GeO7

description: We propose to study the magnetic structure and spin excitations of Tb2Be2GeO7 - a rare-earth based Shastry-Sutherland compound - on high-quality single crystal sample and investigate its evolution under magnetic field. In particular we are interested in performing inelastic neutron scattering experiment to probe the spin-wave excitations at fields where we observe the magnetization plateaus in order to extract the exchange interactions.
DOI: 10.5286/isis.e.rb2410278
title: Structural kinetics of cement carbonation examined by neutron interferometric imaging (INFER) and SESANS

description: Cements and concretes are hierarchical porous solids that form the basis of most modern infrastructures, and growing interest exists to sequester atmospheric CO2 in their alkaline structure to offset emissions during cement production. Cement structures vary from nm to cm, and it remains a significant challenge to capture this structural hierarchy as it reacts. NIST is developing a three-grating far-field neutron interferometric imaging instrument (INFER) that aims to quantify hierarchical structures by combining neutron interferometry, tomography, and small-angle scattering. Despite promising results, INFER lacks quantitative validation from an independent method. The SESANS technique is ideal to compare with recent INFER data of carbonated cements. SESANS will also extend the range of comparison beyond SANS limitations, toward length scales of 1000 nm, which is useful to identify granular regions in carbonated cements. We propose to measure the structural kinetics of carbonated cement formulations with different water-to-cement ratios, limestone-to-cement ratios, and carbonation curing times, which are known to influence cement rheological properties and water/CO2 permeabilities. SESANS data will be modeled by a summed mass-surface fractal by a Hankel transformation shown to agree with previous SANS and INFER data of the same carbonated cements. Together, these measurements will improve understanding of cement structural evolution from nanometer to centimeters.
DOI: 10.5286/isis.e.rb2410278-1
title: Structural kinetics of cement carbonation examined by neutron interferometric imaging (INFER) and SESANS

description: Cements and concretes are hierarchical porous solids that form the basis of most modern infrastructures, and growing interest exists to sequester atmospheric CO2 in their alkaline structure to offset emissions during cement production. Cement structures vary from nm to cm, and it remains a significant challenge to capture this structural hierarchy as it reacts. NIST is developing a three-grating far-field neutron interferometric imaging instrument (INFER) that aims to quantify hierarchical structures by combining neutron interferometry, tomography, and small-angle scattering. Despite promising results, INFER lacks quantitative validation from an independent method. The SESANS technique is ideal to compare with recent INFER data of carbonated cements. SESANS will also extend the range of comparison beyond SANS limitations, toward length scales of 1000 nm, which is useful to identify granular regions in carbonated cements. We propose to measure the structural kinetics of carbonated cement formulations with different water-to-cement ratios, limestone-to-cement ratios, and carbonation curing times, which are known to influence cement rheological properties and water/CO2 permeabilities. SESANS data will be modeled by a summed mass-surface fractal by a Hankel transformation shown to agree with previous SANS and INFER data of the same carbonated cements. Together, these measurements will improve understanding of cement structural evolution from nanometer to centimeters.
DOI: 10.3535/m3l-mca-f0k
title: Betonica officinalis L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410143
title: Inelastic Neutron Scattering Studies of Shastry-Sutherland Model System Tb2Be2GeO7

description: We propose to study the magnetic structure and spin excitations of Tb2Be2GeO7 - a rare-earth based Shastry-Sutherland compound - on high-quality single crystal sample and investigate its evolution under magnetic field. In particular we are interested in performing inelastic neutron scattering experiment to probe the spin-wave excitations at fields where we observe the magnetization plateaus in order to extract the exchange interactions.
DOI: 10.5286/isis.e.rb2410166
title: Interaction of mucin and stimuli-responsive gels at interfaces
DOI: 10.5286/isis.e.rb2410166-2
title: Interaction of mucin and stimuli-responsive gels at interfaces

description: Intranasal drug delivery offers a promising alternative with advantages like improved patient compliance, enhanced bioavailability, and reduced systemic side effects. However, a key challenge lies in finding materials with strong mucoadhesive properties to overcome mucociliary clearance, a defense mechanism in the respiratory system. Establishing robust interactions between drug carriers and mucin, facilitated by mechanisms like electrostatic attractions, van der Waals forces, hydrophobic interactions, hydrogen bonding, and chain entanglement, is crucial. Our proposal focuses on assessing stimuli-responsive gels and their interplay with the mucin layer using neutron reflectometry, enabling a comprehensive exploration of these interactions.
DOI: 10.3535/0z8-tsa-qw9
title: Daboecia cantabrica (Huds.) K. Koch

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/q7b-33s-14e
title: Eriophorum vaginatum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2410167
title: The Effect of Plant Apoplastic Conditions on the Gram Negative Bacterial Outer Membrane of Adapted and Non-Adapted Pathogenic Species

description: Bacterial plant pathogens cause a significant loss of agricultural yields. Several species of the Gram negative bacterium Pseudomonas syringae are responsible for bacterial plant pathogenesis. Gram negative bacteria possess an asymmetric distribution phospholipids and lipopolysacchairdes (LPS) in their outer membrane (OM) which protect the microbe from its external environment. Members of the P. syringae species of phytopathogens have been shown to adapt their LPS structure to survive in plant conditions during pathogen activity. In a recent OFFSPEC experiment we compared three differing floating membrane models of the bacterial OM. Two were produced using P. aeruginosa and E. coli LPS and another was made from P. syringae LPS. We found that only the P. syringae LPS containing model was able to remain viable after being flushed into plant apoplastic pH and ion conditions. Here we wish to continue this study by resolving if it is pH or ion change stability which the P. syringae pathogen LPS modification imbue as well as resolve if these modifications give the microbe defence against plant innate immune system antimicrobials, namely the thionin family of small cationic antimicrobial proteins. This proposal was submitted for the 23_2 round and was well recieved but did not make the cut off due to the competitiveness of that round. Therefore we are resubmitting for the 24_1 round where there is more beam availiability due to the return of Surf and Inter to the user program.
DOI: 10.5286/isis.e.rb2410167-1
title: The Effect of Plant Apoplastic Conditions on the Gram Negative Bacterial Outer Membrane of Adapted and Non-Adapted Pathogenic Species

description: Bacterial plant pathogens cause a significant loss of agricultural yields. Several species of the Gram negative bacterium Pseudomonas syringae are responsible for bacterial plant pathogenesis. Gram negative bacteria possess an asymmetric distribution phospholipids and lipopolysacchairdes (LPS) in their outer membrane (OM) which protect the microbe from its external environment. Members of the P. syringae species of phytopathogens have been shown to adapt their LPS structure to survive in plant conditions during pathogen activity. In a recent OFFSPEC experiment we compared three differing floating membrane models of the bacterial OM. Two were produced using P. aeruginosa and E. coli LPS and another was made from P. syringae LPS. We found that only the P. syringae LPS containing model was able to remain viable after being flushed into plant apoplastic pH and ion conditions. Here we wish to continue this study by resolving if it is pH or ion change stability which the P. syringae pathogen LPS modification imbue as well as resolve if these modifications give the microbe defence against plant innate immune system antimicrobials, namely the thionin family of small cationic antimicrobial proteins. This proposal was submitted for the 23_2 round and was well recieved but did not make the cut off due to the competitiveness of that round. Therefore we are resubmitting for the 24_1 round where there is more beam availiability due to the return of Surf and Inter to the user program.
DOI: 10.3535/52w-vl7-h1m
title: Viola riviniana Rchb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/sa7-npw-2hb
title: Leontodon hispidus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220388
title: Oxygen Dynamics in Y2O3 doped Bi2O3: (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3

description: The high ionic conducting delta-phase of Bi2O3 can be stabilized at ambient temperature in a range of compositions, viz., (Bi1-xYx)2O3 (x=0.1 -0.5). We would measure quasielastic neutron scattering (QENS) spectra for (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3 from 300 K to 1050 K. Our ab initio molecular dynamics calculations show that macroscopic diffusion (although less) is attainable in yttria stabilized Bi2O3 at much lower temperatures, which is more suited for technological applications. . Our molecular dynamics simulation shows that diffusion in (Bi1-xYx)2O3 (x=0.1 - 0.5) starts at a smaller rate yet macroscopic diffusion is attainable at a low temperature of around 600 K. The study of (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3 would enable us better to understand the role of non-stoichiometry and structural disorder in leading to high diffusion coefficient of oxygen atoms in doped compounds.
DOI: 10.5286/isis.e.rb2220388-1
title: Oxygen Dynamics in Y2O3 doped Bi2O3: (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3

description: The high ionic conducting delta-phase of Bi2O3 can be stabilized at ambient temperature in a range of compositions, viz., (Bi1-xYx)2O3 (x=0.1 -0.5). We would measure quasielastic neutron scattering (QENS) spectra for (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3 from 300 K to 1050 K. Our ab initio molecular dynamics calculations show that macroscopic diffusion (although less) is attainable in yttria stabilized Bi2O3 at much lower temperatures, which is more suited for technological applications. . Our molecular dynamics simulation shows that diffusion in (Bi1-xYx)2O3 (x=0.1 - 0.5) starts at a smaller rate yet macroscopic diffusion is attainable at a low temperature of around 600 K. The study of (Bi0.8Y0.2)2O3 and (Bi0.6Y0.4)2O3 would enable us better to understand the role of non-stoichiometry and structural disorder in leading to high diffusion coefficient of oxygen atoms in doped compounds.
DOI: 10.5286/isis.e.rb2410616
title: Stable Heavy Water: The Case of Water-in-Salt Electrolytes

description: This is a continuation proposal aiming to finish measurements awarded in proposal RB2220714. We request a further 5 days of beamtime on VESUVIO to measure different dilutions of the deuterated water-in-salt electrolyte, LiTFSI. We were unable to conduct the planned deuteration of our systems due to intermittent beam and reduced statistics.
DOI: 10.5286/isis.e.rb2410616-1
title: Stable Heavy Water: The Case of Water-in-Salt Electrolytes

description: This is a continuation proposal aiming to finish measurements awarded in proposal RB2220714. We request a further 5 days of beamtime on VESUVIO to measure different dilutions of the deuterated water-in-salt electrolyte, LiTFSI. We were unable to conduct the planned deuteration of our systems due to intermittent beam and reduced statistics.
DOI: 10.3535/b3h-pk4-878
title: Catapodium Link

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/wvq-s89-mwb
title: Dactylorhiza Neck. ex Nevski

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.