cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2420493
title: Multilayer model for pea protein supramolecular aggregates with phospholipids studied by neutron reflectometry.

description: We need to build a food system that include more sustainable, plant-derived protein, substituting animal protein in our diet. This is
challenging as we are not able to control the technological functionality of these proteins in foods. We propose to study the
supramolecular aggregates formed from pea proteins in the seed, as well as in the isolates, using for the first time neutron reflectometry. We are proposing that pea proteins, in nature, have compact structures dominated by hydrogen (beta-sheet stacks) bridges and hydrophobic interactions. These supramolecular stacked aggregates structure which includes phospholipids are critical to the preservation of the protein bodies (about 3 micron size) in the seed. We are proposing that the protein in the protein body of the seed is structured in various stratified layers with a layer of phospholipids present in between the layers. This can in the seed protect the protein from a rapid dissolution. To test this hypothesis, we would like to perform neutron reflectometry experiments with phospholipid layers and extracts of different pea proteins. This will allow us to observe “formation” of these protein/lipid structures.
DOI: 10.5286/isis.e.rb2420493-1
title: Multilayer model for pea protein supramolecular aggregates with phospholipids studied by neutron reflectometry.

description: We need to build a food system that include more sustainable, plant-derived protein, substituting animal protein in our diet. This is
challenging as we are not able to control the technological functionality of these proteins in foods. We propose to study the
supramolecular aggregates formed from pea proteins in the seed, as well as in the isolates, using for the first time neutron reflectometry. We are proposing that pea proteins, in nature, have compact structures dominated by hydrogen (beta-sheet stacks) bridges and hydrophobic interactions. These supramolecular stacked aggregates structure which includes phospholipids are critical to the preservation of the protein bodies (about 3 micron size) in the seed. We are proposing that the protein in the protein body of the seed is structured in various stratified layers with a layer of phospholipids present in between the layers. This can in the seed protect the protein from a rapid dissolution. To test this hypothesis, we would like to perform neutron reflectometry experiments with phospholipid layers and extracts of different pea proteins. This will allow us to observe “formation” of these protein/lipid structures.
DOI: 10.5286/isis.e.rb2510725
title: Investigating phase transitions in Lipid Nanoparticles (LNPs) by coupling SANS with in-situ DLS to aid LNP design

description: Lipid nanoparticles (also known as LNPs) are revolutionizing genetic medicine. Many clinical LNP formulations have surprisingly similar lipid compositions but different geometries. Recently, it has been reported that the buffers used to formulate LNPs impact LNP in vivo performance. We have used these findings to generate mRNA loaded LNPs with the same lipid composition but different internal structures.
A likely consequence of this is a redistribution of the lipid components which may alter the phase behavior and structural transitions of the LNPs. This experiment couples in-situ light scattering and SANS to study lipid nanoparticle structural variations, aggregation and stability over clinically relevant temperatures and spanning known phase transition regions. This will enable us to investigate which structural transitions LNPs undergo over these temperature ranges and correlate these to particle stability using in situ DLS. This information is critical for cell-based LNP assays where storage of LNPs between formulation and cell experiments is necessary and to enable enhanced shipment of LNPs. Furthermore we anticipate that establishing the structural changes during observed LNP phase transitions will enhance our ability to rationally engineer LNPs.
DOI: 10.34816/ifao.archives.233006
title: SAQQARA_di_1994_00968

description: Référence : di_1994_00968<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/5le-6sm-n41
title: Crepis pyrenaica (L.) Greuter

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ncn-w1y-dla
title: Luzula luzuloides subsp. rubella (Hoppe ex Mert. & W. D. J. Koch) Holub

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2310230-3
title: High-Pressure and Low-Temperature Structural Behaviour of 2,2,2-tricholoroethanol

description: In the mono-alcohols (ROH) there is a competition between the packing requirements of the relatively bulky R-group and the demand for the small hydroxyl groups to be sufficiently close for hydrogen bonding to occur. We have been carrying out a series of high-pressure studies on a range of mono-alcohol systems with our most recent study of 2,2,2-trifluoroethanol demonstrating that it has a surprisingly rich phase diagram. These studies were carried out with single-crystal X-ray diffraction at diamond and complementary low-temperature studies, at high-pressure using neutron powder-diffraction on PEARL. We now wish to extend this recent work to 2,2,2-trichloroethanol which, from our preliminary single-crystal high-pressure and low-temperature studies, also has a similarly rich phase diagram.
DOI: 10.5286/isis.e.rb2510045-1
title: μSR study on the frustrated trillium lattice antiferromagnet K2Co2(SO4)3

description: We propose to study a frustrated trillium lattice compound K2Co2(SO4)3 where Co(2+) ions feature a Jeff = ½ ground state at low temperatures. The compound exhibits the onset of an antiferromagnetic ordering around T* ~ 0.6 K in heat capacity. With the applied field of 1 T, the transition is completely suppressed, indicating a field-induced dynamic state similar to the isostructural compound K2Ni2(SO4)3. With a large frustration ratio of 16 and enhanced quantum fluctuations because of Jeff = ½ ground state, K2Co2(SO4)3 provides an ideal platform to realize the quantum spin liquid state. We propose to measure a series of zero-field measurements complemented by longitudinal field decoupling scans to verify the presence of static and/or dynamic magnetic order.
DOI: 10.3535/1s6-nhh-qfd
title: Carex parviflora Host

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/vc2-q4q-0jl
title: Crepis vesicaria subsp. taraxacifolia (Thuill.) Thell.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510045
title: μSR study on the frustrated trillium lattice antiferromagnet K2Co2(SO4)3

description: We propose to study a frustrated trillium lattice compound K2Co2(SO4)3 where Co(2+) ions feature a Jeff = ½ ground state at low temperatures. The compound exhibits the onset of an antiferromagnetic ordering around T* ~ 0.6 K in heat capacity. With the applied field of 1 T, the transition is completely suppressed, indicating a field-induced dynamic state similar to the isostructural compound K2Ni2(SO4)3. With a large frustration ratio of 16 and enhanced quantum fluctuations because of Jeff = ½ ground state, K2Co2(SO4)3 provides an ideal platform to realize the quantum spin liquid state. We propose to measure a series of zero-field measurements complemented by longitudinal field decoupling scans to verify the presence of static and/or dynamic magnetic order.
DOI: 10.5286/isis.e.rb2510435
title: Effect of deformation on microstructure and properties of steel grinding ball us using Neutron diffraction technique

description: The manufacturing of steel grinding balls involves a complex process where the final microstructure is influenced by several factors, including cooling rates, ball diameters, alloying elements, and heat treatment temperatures. The steel grinding media primarily consist of martensite and retained austenite, with the volume fraction of these phases varying from the surface to the core of the balls. During grinding operations, steel balls undergo repetitive impacts from contact with other balls, mill liners, and ore particles. This induces the transformation-induced plasticity (TRIP) effect, where austenite transforms into martensite, thereby enhancing the material's work-hardening. This neutron experiment aims to investigate the effects of deformation on the microstructure evolution and phase distribution within steel grinding balls. Specifically, the study will focus on the depth profile analysis and local variants investigation of samples subjected to varying durations of service and depths, utilizing neutron diffraction techniques. The data generated from this experiment will contribute to the design of superior grinding balls, optimizing their performance and longevity in industrial applications.
DOI: 10.5286/isis.e.rb2510435-1
title: Effect of deformation on microstructure and properties of steel grinding ball us using Neutron diffraction technique

description: The manufacturing of steel grinding balls involves a complex process where the final microstructure is influenced by several factors, including cooling rates, ball diameters, alloying elements, and heat treatment temperatures. The steel grinding media primarily consist of martensite and retained austenite, with the volume fraction of these phases varying from the surface to the core of the balls. During grinding operations, steel balls undergo repetitive impacts from contact with other balls, mill liners, and ore particles. This induces the transformation-induced plasticity (TRIP) effect, where austenite transforms into martensite, thereby enhancing the material's work-hardening. This neutron experiment aims to investigate the effects of deformation on the microstructure evolution and phase distribution within steel grinding balls. Specifically, the study will focus on the depth profile analysis and local variants investigation of samples subjected to varying durations of service and depths, utilizing neutron diffraction techniques. The data generated from this experiment will contribute to the design of superior grinding balls, optimizing their performance and longevity in industrial applications.
DOI: 10.34816/ifao.archives.233007
title: SAQQARA_di_1994_00967

description: Référence : di_1994_00967<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/890-hn6-h1l
title: Juncus filiformis L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/gzw-pcs-e0z
title: Carex pauciflora Lightf.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510048-1
title: Investigation of crystal-field and spin-wave excitations in a honeycomb magnet BiErGeO5

description: We have investigated the magnetic properties of a two-dimensional distorted honeycomb magnet BiErGeO5 using various thermodynamic and μSR experiments. Er^3+ is a Kramers ion and expected to form ground state doublets at low temperature. In zero-field, heat capacity shows two broad peaks at T* ≃ 1.1 K and T** ≃ 8.3 K and a sharp anomaly at around TN ≃ 0.4 K indicative of a magnetic ordering. With increasing field, the broad peaks at T* and T** move towards high temperatures and then overlap with each other in high fields. These observations suggest that the two peaks at T* and T** are related to the CEF excitations of Er^3+ ions. Surprisingly, the temperature dependent zero-field muSR relaxation rate λ shows a plateau below 10 K, without any feature at TN ≃ 0.4 K. These contrasting results from heat capacity and zero-field muSR require further investigations. The low energy CEF levels significantly influence the ground state and hence the thermodynamic properties. In order to confirm the ground state and to model the magnetization and heat capacity data, we need to have an estimate of the CEF levels. Therefore, we propose to do inelastic neutron scattering (INS) experiments in zero-field in MERLIN and OSIRIS spectrometer. In MERLIN, we want to measure high-energy CEF in the temperature range of 5- 300 K. OSIRIS spectrometer will be used to evaluate low-energy CEF, short range correlations, and spin wave excitations below 5 K.
DOI: 10.5286/isis.e.rb2510257
title: In Situ Investigation of Water Adsorption and Structural Transformations in Activated CuIm MOFs Using Wide Q-Range Neutron Diffraction

description: Metal-Organic Frameworks (MOFs) represent a versatile class of porous, crystalline materials with wide-ranging applications in environmental and biological fields, including catalysis, energy storage, gas capture, and drug delivery. Here we aim to study structural transformations in newly synthesized CuIm MOF due to water absorption/desorption, utilising wide Q-range neutron diffraction. The obtained results will complement our XAS findings and aims to investigate these transformations in situ by exposing samples to water in a controlled environment.
DOI: 10.5286/isis.e.rb2510257-1
title: In Situ Investigation of Water Adsorption and Structural Transformations in Activated CuIm MOFs Using Wide Q-Range Neutron Diffraction

description: Metal-Organic Frameworks (MOFs) represent a versatile class of porous, crystalline materials with wide-ranging applications in environmental and biological fields, including catalysis, energy storage, gas capture, and drug delivery. Here we aim to study structural transformations in newly synthesized CuIm MOF due to water absorption/desorption, utilising wide Q-range neutron diffraction. The obtained results will complement our XAS findings and aims to investigate these transformations in situ by exposing samples to water in a controlled environment.
DOI: 10.34816/ifao.archives.233008
title: SAQQARA_di_1994_00966

description: Référence : di_1994_00966<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/hb2-e5s-wnn
title: Sesleria caerulea (L.) Ard.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/hg1-4jl-nta
title: Juncus articulatus subsp. articulatus

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420467
title: The curious case of surfactant self-assembly in H-bonding rich non-aqueous media: Unexpected effect of counterions

description: Deep eutectic solvents (DES) are considered a greener alternative to conventional ionic liquids, and their hydrogen bond-rich environment has been shown to support self-assembly of different amphiphiles. Here, we propose to perform a small angle neutron scattering (SANS) characterisation of the self-assembled nanostructures of STAC (cetrimonium chloride) and CTAB, cetrimonium bromide) in glycerol and DES glycelin (choline chloride:glycerol in a 1:2 molar ratio). Differing only in their counterions (Cl- vs Br-; Fig.1), the two surfactants exhibited, surprisingly, contrasting self-assembly behaviours: STAC formed a gel in glyceline but not in glyceol; whereas CTAB formed a gel in glycerol but not in glyceline (Fig. 2). SANS will provide unique nanostructural insights to complement rheology and polarised light microscopy, shedding light on the mechanisms of molecular self-assembly in such H-bonding rich non-aqueous media, important to their future application as a green solvent.
DOI: 10.5286/isis.e.rb2420467-1
title: The curious case of surfactant self-assembly in H-bonding rich non-aqueous media: Unexpected effect of counterions

description: Deep eutectic solvents (DES) are considered a greener alternative to conventional ionic liquids, and their hydrogen bond-rich environment has been shown to support self-assembly of different amphiphiles. Here, we propose to perform a small angle neutron scattering (SANS) characterisation of the self-assembled nanostructures of STAC (cetrimonium chloride) and CTAB, cetrimonium bromide) in glycerol and DES glycelin (choline chloride:glycerol in a 1:2 molar ratio). Differing only in their counterions (Cl- vs Br-; Fig.1), the two surfactants exhibited, surprisingly, contrasting self-assembly behaviours: STAC formed a gel in glyceline but not in glyceol; whereas CTAB formed a gel in glycerol but not in glyceline (Fig. 2). SANS will provide unique nanostructural insights to complement rheology and polarised light microscopy, shedding light on the mechanisms of molecular self-assembly in such H-bonding rich non-aqueous media, important to their future application as a green solvent.
DOI: 10.5286/isis.e.rb2510048
title: Investigation of crystal-field and spin-wave excitations in a honeycomb magnet BiErGeO5

description: We have investigated the magnetic properties of a two-dimensional distorted honeycomb magnet BiErGeO5 using various thermodynamic and μSR experiments. Er^3+ is a Kramers ion and expected to form ground state doublets at low temperature. In zero-field, heat capacity shows two broad peaks at T* ≃ 1.1 K and T** ≃ 8.3 K and a sharp anomaly at around TN ≃ 0.4 K indicative of a magnetic ordering. With increasing field, the broad peaks at T* and T** move towards high temperatures and then overlap with each other in high fields. These observations suggest that the two peaks at T* and T** are related to the CEF excitations of Er^3+ ions. Surprisingly, the temperature dependent zero-field muSR relaxation rate λ shows a plateau below 10 K, without any feature at TN ≃ 0.4 K. These contrasting results from heat capacity and zero-field muSR require further investigations. The low energy CEF levels significantly influence the ground state and hence the thermodynamic properties. In order to confirm the ground state and to model the magnetization and heat capacity data, we need to have an estimate of the CEF levels. Therefore, we propose to do inelastic neutron scattering (INS) experiments in zero-field in MERLIN and OSIRIS spectrometer. In MERLIN, we want to measure high-energy CEF in the temperature range of 5- 300 K. OSIRIS spectrometer will be used to evaluate low-energy CEF, short range correlations, and spin wave excitations below 5 K.
DOI: 10.3535/z76-06h-akm
title: Carex echinata Murray

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510420
title: Exploration for chiral magnons splitting in g-wave altermagnets CrSb

description: Altermagnetism has been recently proposed as a new elementary magnetic phase, in addition to traditional ferromagnetism and antiferromagnetism, based on a developed spin-group-symmetry classification focusing on collinear magnets. Recently, several altermagnet candidates have been predicted and spin-splitting band structures has been observed through angle-resolved photoemission spectroscopy in some of them, including MnTe, CrSb and RuO2, etc.. Beyond spin splitting in electronic band structures, non-degenerate chiral magnons are also theoretically predicted in altermagnets at zero magnetic fields, which deviates from the magnon spectrum of conventional antiferromagnets. In this proposal, we aim to study the altermagnetic candidate CrSb, which has a high Néel temperature (TN) of ~710 K and is predicted to exhibit large spin splitting. Confirming the presence of chiral magnon splitting in CrSb is crucial to advancing our understanding of altermagnetism and its unique magnetic properties.
DOI: 10.5286/isis.e.rb2510420-1
title: Exploration for chiral magnons splitting in g-wave altermagnets CrSb

description: Altermagnetism has been recently proposed as a new elementary magnetic phase, in addition to traditional ferromagnetism and antiferromagnetism, based on a developed spin-group-symmetry classification focusing on collinear magnets. Recently, several altermagnet candidates have been predicted and spin-splitting band structures has been observed through angle-resolved photoemission spectroscopy in some of them, including MnTe, CrSb and RuO2, etc.. Beyond spin splitting in electronic band structures, non-degenerate chiral magnons are also theoretically predicted in altermagnets at zero magnetic fields, which deviates from the magnon spectrum of conventional antiferromagnets. In this proposal, we aim to study the altermagnetic candidate CrSb, which has a high Néel temperature (TN) of ~710 K and is predicted to exhibit large spin splitting. Confirming the presence of chiral magnon splitting in CrSb is crucial to advancing our understanding of altermagnetism and its unique magnetic properties.
DOI: 10.5286/isis.e.rb2510704-2
title: Tracking muons to their final states in model systems

description: We recently studied KF to investigate muon sites and diffusion pathways, owing to its simple structure and low cation nuclear moment. However, the data showed a very small asymmetry and strange relaxation that we were unable to explain. This result prompted us to consider muon behaviour more widely in the alkali halides, with previous studies suggesting a delayed diamagnetic state is formed through a prompt paramagnetic species. This early work proposed that state conversion is mediated by defect states. One of the crucial assumptions in μSR is that any defects that may be caused by the implantation of the muon are sufficiently far away that they do not affect the final muon spectra, but if the hypothesis from this early work is found to be correct then this could have profound implications for μSR. As alkali fluorides weren’t part of this early study and their measurements on the halides were carried out over a comparatively restricted temperature range, we believe that it’s opportune to take a fresh look at these materials. As well as at-resonance RF measurements to determine state conversion rates, we plan to use a combination of 90º pulsed RF methods and DFT to characterise the final states. The original study will be extended to encompass the alkali fluorides, where the F− ion so often plays a role in significantly modifying the muonic properties of these materials.
DOI: 10.34816/ifao.archives.233009
title: SAQQARA_di_1994_00965

description: Référence : di_1994_00965<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/5hs-h5r-94c
title: Phleum hirsutum Honck.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lx8-vlp-t4n
title: Carex sylvatica subsp. sylvatica

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510461
title: Muon spectroscopy studies of sodium-ion diffusion in layered transition metal oxides for positive electrode battery applications

description: We propose to conduct muon spectroscopy experiments on layered transition metal oxide, Na2/3+xNi1/3-xMn2/3-xNbxO2, with x = 0, 0.02, 0.03), in order to gain improved understanding of local dynamics and Na diffusion rates in this material for Na+-ion battery applications. We request 4 days of beamtime on Emu in order to conduct the necessary experiments. The data collected from this model system will be essential in improved understanding and development of this and other layered transition metal oxide electrode materials as Na+-ion batteries race towards commercialisation.