cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2220764-1
title: Effect of magnetic field on the magnetic structure of Fe-doped MnNiGe alloys

description: Magnetic equiatomic alloys (MEAs) of the general formula MM′X (M, M′ = transition metals, X = Si, Ge, Sn) undergo a magnetostructural transition of martensitic type on cooling from high temperature. Recently, these alloys have been identified as a new class of shape memory alloy and attracted considerable attention due to their rewarding magneto-functional properties like large magnetocaloric effect, exchange bias effect, magnetoresistance, and observation of spin-glass like ground state. In this proposal, our aim is to focus on the effect of an external magnetic field on the magnetic structure of two Fe-doped MnNiGe alloys of nominal compositions Mn0.85Fe0.15NiGe and MnNi0.75Fe0.25Ge where magnetic structure plays a crucial role behind their magneto-functionality. We have previously performed ambient and high-pressure neutron diffraction measurements in zero fields.
DOI: 10.3535/fgj-8c6-7nq
title: Legousia Durande

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/lty-753-zny
title: Trifolium resupinatum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb1835571-28
title: INTER Calibration cycle 18_3
DOI: 10.5286/isis.e.rb2200025-1
title: The 10 nm liquid-like layer in thin polymer films does not exist, reflectivity can prove it

description: Since the discovery (1994) of liquid-like layers in glassy polymers there has been a persistent dogma that a 10 nm liquid like layer exists at the surface of supported polymer thin films. This liquid-like layer manifests as a significant reduction (~ 10°C -30°C) in the glass transition temperature (Tg) of an ultra-thin film, this means orders of magnitude increase in polymer mobility and dynamics. We have evidence which shows this phenomenon simply does not exist and is instead an artefact due to fundamental limitations with the technique originally used to prove its existence, ellipsometry. Unifying our results from ellipsometry with neutron and X-ray reflectivity will unambigously show that when measured correctly, there is no reduction in the Tg of a thin film. Such work is of huge importance and will necessitate re-writing the textbooks in the field.
DOI: 10.3535/4c2-1v7-cnz
title: Holcus lanatus L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/czd-4za-xm9
title: Pimpinella cretica Poir.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2200025
title: The 10 nm liquid-like layer in thin polymer films does not exist, reflectivity can prove it

description: Since the discovery (1994) of liquid-like layers in glassy polymers there has been a persistent dogma that a 10 nm liquid like layer exists at the surface of supported polymer thin films. This liquid-like layer manifests as a significant reduction (~ 10°C -30°C) in the glass transition temperature (Tg) of an ultra-thin film, this means orders of magnitude increase in polymer mobility and dynamics. We have evidence which shows this phenomenon simply does not exist and is instead an artefact due to fundamental limitations with the technique originally used to prove its existence, ellipsometry. Unifying our results from ellipsometry with neutron and X-ray reflectivity will unambigously show that when measured correctly, there is no reduction in the Tg of a thin film. Such work is of huge importance and will necessitate re-writing the textbooks in the field.
DOI: 10.5286/isis.e.rb2220619
title: Mussel-inspired robust boundary lubricants for future electrified transport: Self-assembly of novel catechol-containing polymers in oil

description: We propose a SANS study to examine the self-assembly behaviour of novel catechol-containing polymer additives in oil. Our ultimate aim is to use these molecules for the construction of a robust boundary layer for future industrial lubricants that can strongly attach to a range of organic and inorganic surfaces and withstand the harsh shear conditions. The novel feature of the bespoke polymers synthesized by Infineum is inspired by mussel foot proteins which make use of the bidentate chelation ability of a catechol-containing group (L-3,4-dihydroxyphenylalanine; L-DOPA). As a first step, four novel catechol-containing polymers will be investigated to understand their self-assembly behaviour in oil, exploring the effect of temperature as well as the effect of concentration, polymer architecture, and catechol content.
DOI: 10.5286/isis.e.rb2220619-1
title: Mussel-inspired robust boundary lubricants for future electrified transport: Self-assembly of novel catechol-containing polymers in oil

description: We propose a SANS study to examine the self-assembly behaviour of novel catechol-containing polymer additives in oil. Our ultimate aim is to use these molecules for the construction of a robust boundary layer for future industrial lubricants that can strongly attach to a range of organic and inorganic surfaces and withstand the harsh shear conditions. The novel feature of the bespoke polymers synthesized by Infineum is inspired by mussel foot proteins which make use of the bidentate chelation ability of a catechol-containing group (L-3,4-dihydroxyphenylalanine; L-DOPA). As a first step, four novel catechol-containing polymers will be investigated to understand their self-assembly behaviour in oil, exploring the effect of temperature as well as the effect of concentration, polymer architecture, and catechol content.
DOI: 10.3535/e9b-ljf-kzs
title: Hordeum bulbosum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/zhg-nnp-f9j
title: Filago pyramidata L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2200313-1
title: Nanostructure comparison of phosphonium and imidazolium-orthoborate ionic liquids
DOI: 10.5286/isis.e.rb2220444
title: Investigation of the nanostructure of ionomer in fuel cell catalyst ink by SANS

description: Fuel cells are used in hydrogen-powered electric vehicles, where developments in performance and durability are crucial for further commercialization, which the final structure of the electrode (catalyst layer, CL) strongly influences. Composed of Pt nanoparticles supported on a carbon composite, embedded in a proton conductive polymer, the CL structure is known to be directly connected to that of the catalyst ink, where the components are dispersed in solvent, which is then dried to give highly heterogeneous structures. These are currently not well understood, leaving new developments reliant on a trial and error approach. The aim of this experiment is to develop our understanding of component interactions in catalyst inks, specifically related to the ionomer, via small angle neutron scattering to establish the impact on the final CL structure and hence fuel cell performance.
DOI: 10.5286/isis.e.rb2220444-1
title: Investigation of the nanostructure of ionomer in fuel cell catalyst ink by SANS

description: Fuel cells are used in hydrogen-powered electric vehicles, where developments in performance and durability are crucial for further commercialization, which the final structure of the electrode (catalyst layer, CL) strongly influences. Composed of Pt nanoparticles supported on a carbon composite, embedded in a proton conductive polymer, the CL structure is known to be directly connected to that of the catalyst ink, where the components are dispersed in solvent, which is then dried to give highly heterogeneous structures. These are currently not well understood, leaving new developments reliant on a trial and error approach. The aim of this experiment is to develop our understanding of component interactions in catalyst inks, specifically related to the ionomer, via small angle neutron scattering to establish the impact on the final CL structure and hence fuel cell performance.
DOI: 10.3535/bf3-4eb-t9j
title: Helianthemum salicifolium (L.) Mill.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2200313
title: Nanostructure comparison of phosphonium and imidazolium-orthoborate ionic liquids
DOI: 10.5286/isis.e.rb2220343
title: Mesoscopic Structure of Mucin-Mimicking Hydrogels

description: Biological hydrogels such as mucus, found at surfaces in the human body, act as a protective barrier against pathogens. In this experiment, we aim to develop a thorough understanding of how the rheological properties of mucin-mimicking hydrogels are related to their mesoscopic structure. For two different model hydrogel systems, we will systematically vary polymer chain length, concentration, pH and salt concentration, which yields a broad range of viscoelastic behaviour. Using SANS, we want to establish a connection to the associated structural changes on the mesoscopic scale. From the resulting spectra, we will be able to extract important hydrogel parameters such as mesh size and the fractal dimension of the polymer network. These parameters are required as input for a detailed theoretical description of the hydrogels based on bottom-up modelling techniques.
DOI: 10.5286/isis.e.rb2220343-1
title: Mesoscopic Structure of Mucin-Mimicking Hydrogels

description: Biological hydrogels such as mucus, found at surfaces in the human body, act as a protective barrier against pathogens. In this experiment, we aim to develop a thorough understanding of how the rheological properties of mucin-mimicking hydrogels are related to their mesoscopic structure. For two different model hydrogel systems, we will systematically vary polymer chain length, concentration, pH and salt concentration, which yields a broad range of viscoelastic behaviour. Using SANS, we want to establish a connection to the associated structural changes on the mesoscopic scale. From the resulting spectra, we will be able to extract important hydrogel parameters such as mesh size and the fractal dimension of the polymer network. These parameters are required as input for a detailed theoretical description of the hydrogels based on bottom-up modelling techniques.
DOI: 10.3535/5w1-ey7-1ep
title: Ainsworthia trachycarpa Boiss.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/h4q-1rd-pqq
title: Catapodium rigidum (L.) C.E.Hubb.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2010747
title: Monitoring uranium corrosion in 15-year-old simulant nuclear waste packages

description: Within the British nuclear inventory, fuel cladding waste used to be encapsulated in grout and stored in stainless steel drums. Due to mechanical faults occurring during metal fuel-cladding separation, it is expected that uranium swarf is also present in these drums. Recent inspections have revealed considerable distortion in a proportion of these drums, ascribed to uranium and cladding material corrosion taking place over the storage period. Potential mechanical failure of the drums raises concerns about how efficient the grout encapsulation is. We are now custodians of a number of mini trials, simulants of nuclear waste drums and initially produced by National Nuclear Laboratory approximately 15 years ago. We aim to perform neutron tomography and diffraction to investigate the state of interior metallic corrosion and grout degradation, and associate it with the real case scenario.
DOI: 10.5286/isis.e.rb2010747-1
title: Monitoring uranium corrosion in 15-year-old simulant nuclear waste packages

description: Within the British nuclear inventory, fuel cladding waste used to be encapsulated in grout and stored in stainless steel drums. Due to mechanical faults occurring during metal fuel-cladding separation, it is expected that uranium swarf is also present in these drums. Recent inspections have revealed considerable distortion in a proportion of these drums, ascribed to uranium and cladding material corrosion taking place over the storage period. Potential mechanical failure of the drums raises concerns about how efficient the grout encapsulation is. We are now custodians of a number of mini trials, simulants of nuclear waste drums and initially produced by National Nuclear Laboratory approximately 15 years ago. We aim to perform neutron tomography and diffraction to investigate the state of interior metallic corrosion and grout degradation, and associate it with the real case scenario.
DOI: 10.5286/isis.e.rb2220073-1
title: Effect of the chain conformation of denatured protein on the formation of single-chain nanoparticles

description: Protein nanoparticles with sizes ranging tens to hundreds of nanometers have been reported for diverse applications mainly in nanomedicine. The idea now is to push down the size of protein nanoparticles using single-chain technology. By definition, single chain nanoparticles are unimolecular polymer chains folded or collapsed via intra-molecular cross-linking under dilute conditions.Therefore, we have successfully adopted the strategy to cross-link internally the lysine residues of denatured BSA using disuccinimidyl ester cross-linkers and followed the chain collapse using SANS. Now, this proposal aims to use SANS to understand the effect of the polypeptide chain conformation on the structure of SCNPs and, thus, optimize the degree of collapse. This paves the way to the synthesis of biodegradable polypeptide SCNPs for a range of applications.
DOI: 10.3535/0y1-5d2-pbm
title: Milium effusum L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/ln9-1cs-gg1
title: Dianthus deltoides subsp. deltoides

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220065
title: Determining the size and structure of stable and compact single chain polymeric nanoparticles prepared via different folding pathways.

description: We have prepared single-chain polymeric nanoparticles in water, that are folded via different pathways into particles with a structured, hydrophobic pocket: Either first non-covalent interactions followed by covalent interactions, or vice versa. The particles differ strongly in size and size stability upon solvent-switch as probed by DLS and SEC, temperature stability, and interactions with complex media. However, the in-depth determination of the size, structure, and shape was not possible by SLS and SAXS due to the small size in the former case, and scattering in SAXS only originating from the hydrophobic pocket of the particles instead of the entire particle. SANS is needed to link the precise size/shape/structure/molecular weight of the particles of the entire particle to the observed (differences in) properties.
DOI: 10.5286/isis.e.rb2220065-1
title: Determining the size and structure of stable and compact single chain polymeric nanoparticles prepared via different folding pathways.

description: We have prepared single-chain polymeric nanoparticles in water, that are folded via different pathways into particles with a structured, hydrophobic pocket: Either first non-covalent interactions followed by covalent interactions, or vice versa. The particles differ strongly in size and size stability upon solvent-switch as probed by DLS and SEC, temperature stability, and interactions with complex media. However, the in-depth determination of the size, structure, and shape was not possible by SLS and SAXS due to the small size in the former case, and scattering in SAXS only originating from the hydrophobic pocket of the particles instead of the entire particle. SANS is needed to link the precise size/shape/structure/molecular weight of the particles of the entire particle to the observed (differences in) properties.
DOI: 10.5286/isis.e.rb2220073
title: Effect of the chain conformation of denatured protein on the formation of single-chain nanoparticles

description: Protein nanoparticles with sizes ranging tens to hundreds of nanometers have been reported for diverse applications mainly in nanomedicine. The idea now is to push down the size of protein nanoparticles using single-chain technology. By definition, single chain nanoparticles are unimolecular polymer chains folded or collapsed via intra-molecular cross-linking under dilute conditions.Therefore, we have successfully adopted the strategy to cross-link internally the lysine residues of denatured BSA using disuccinimidyl ester cross-linkers and followed the chain collapse using SANS. Now, this proposal aims to use SANS to understand the effect of the polypeptide chain conformation on the structure of SCNPs and, thus, optimize the degree of collapse. This paves the way to the synthesis of biodegradable polypeptide SCNPs for a range of applications.
DOI: 10.3535/a5p-hsf-3pd
title: Bromus commutatus subsp. decipiens (Bomble & H.Scholz) H.Scholz

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/mjs-0ez-977
title: Alyssum szovitsianum Fisch. & C. A. Mey.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220590-1
title: Structure Formation of Magnetic Nanoparticles in AC Magnetic Fields

description: By reducing the size of magnetic nanoparticles (MNPs) below a material-specific length scale they become magnetic single-domains, meaning that all atomic magnetic moments are preferentially aligned along the same direction. When MNPs are dispersed in a fluid they can be manipulated (i.e. moved around, rotated etc) by external magnetic fields. This makes them great candidates for various novel applications, especially in life science but also industrial applications. One of the most prominent biomedical applications of MNPs is magnetic hyperthermia.We propose to study the structure formation of MNPs samples in-situ in AC fields using SANS and a dedicated RF setup. With this study, we expect to gain a detailed understanding of the type and spatial extent of formed MNP aggregates and potential reversibility is therefore indispensable for real life application of magnetic hyperthermia.
DOI: 10.5286/isis.e.rb2220703
title: An in vitro Gram-negative double bilayer envelope mimetic

description: An attractive target for antimicrobial development is the bacterial cell envelope, with the mechanisms of its formation potentially holding the key to generating new antimicrobials. All Gram-negative bacteria possess two membranes that enclose the cell. Studying this double membrane system accurately within the laboratory has remained impossible with models only of individual membranes. Here, we aim to recreate the bacterial double membrane system on top of a solid sensor support giving us a unique platform to investigate its structure and function. Through this system we will be able to probe the fundamentals of its biochemistry, with pathways being studied in real time in a highly realistic setting for the first time. Such a system will provide a hugely powerful tool for understanding the fundamentals of membrane formation and potentially lead to the development of new antimicrobials.
DOI: 10.5286/isis.e.rb2220703-1
title: An in vitro Gram-negative double bilayer envelope mimetic

description: An attractive target for antimicrobial development is the bacterial cell envelope, with the mechanisms of its formation potentially holding the key to generating new antimicrobials. All Gram-negative bacteria possess two membranes that enclose the cell. Studying this double membrane system accurately within the laboratory has remained impossible with models only of individual membranes. Here, we aim to recreate the bacterial double membrane system on top of a solid sensor support giving us a unique platform to investigate its structure and function. Through this system we will be able to probe the fundamentals of its biochemistry, with pathways being studied in real time in a highly realistic setting for the first time. Such a system will provide a hugely powerful tool for understanding the fundamentals of membrane formation and potentially lead to the development of new antimicrobials.
DOI: 10.3535/6hd-xgb-qjz
title: Phleum phleoides (L.) H.Karst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/6xx-ycj-wl0
title: Phleum subulatum (Savi) Asch. & Graebn.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2220141
title: SANS study of pesticide solubilisation in nonionic bola-formed triblock copolymer nanoaggregates

description: Our recent studies have indicated the high potential of triblock Pluronic copolymers in solubilising pesticides. This SANS experiment is to outline how changes in the Pluronic polymer structures affect micellar nanostructures and how solubilisation of representative pesticides affects the transition of the micellar size and shape. H/D substitutions will help improve structural resolution. This SANS work offers the nanostrucutures of polymeric nanoaggregates before and after pesticide solubilisation and fulfils a crucial gap between molecular structures and solubility optimisation. 2 days of SANS2D time is requested to illustrate structural features of the micellar nanostructures. SANS2D is preferred because of the need to cover the whole Q range, especially the lowest Q range down to 0.001 Å-1 to determine the sizes of micelles, the cores, shells and water distributions.
DOI: 10.5286/isis.e.rb2220141-1
title: SANS study of pesticide solubilisation in nonionic bola-formed triblock copolymer nanoaggregates

description: Our recent studies have indicated the high potential of triblock Pluronic copolymers in solubilising pesticides. This SANS experiment is to outline how changes in the Pluronic polymer structures affect micellar nanostructures and how solubilisation of representative pesticides affects the transition of the micellar size and shape. H/D substitutions will help improve structural resolution. This SANS work offers the nanostrucutures of polymeric nanoaggregates before and after pesticide solubilisation and fulfils a crucial gap between molecular structures and solubility optimisation. 2 days of SANS2D time is requested to illustrate structural features of the micellar nanostructures. SANS2D is preferred because of the need to cover the whole Q range, especially the lowest Q range down to 0.001 Å-1 to determine the sizes of micelles, the cores, shells and water distributions.
DOI: 10.5286/isis.e.rb2220590
title: Structure Formation of Magnetic Nanoparticles in AC Magnetic Fields

description: By reducing the size of magnetic nanoparticles (MNPs) below a material-specific length scale they become magnetic single-domains, meaning that all atomic magnetic moments are preferentially aligned along the same direction. When MNPs are dispersed in a fluid they can be manipulated (i.e. moved around, rotated etc) by external magnetic fields. This makes them great candidates for various novel applications, especially in life science but also industrial applications. One of the most prominent biomedical applications of MNPs is magnetic hyperthermia.We propose to study the structure formation of MNPs samples in-situ in AC fields using SANS and a dedicated RF setup. With this study, we expect to gain a detailed understanding of the type and spatial extent of formed MNP aggregates and potential reversibility is therefore indispensable for real life application of magnetic hyperthermia.
DOI: 10.3535/y4n-7xf-ber
title: Draba verna L.

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