cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2420185-1
title: Visualisation of water dynamics in heterogeneously perforated gas diffusion layers-based polymer electrolyte fuel cells using neutron radiography

description: Contemporary society tackles the intertwined challenges of energy sustainability and environmental preservation. Polymer electrolyte fuel cells (PEFCs) have the potential to be a vital technology in a green, electricity-based energy landscape but currently suffer from intrinsic water management problems. The proposed heterogeneously perforated gas diffusion layers serve as a simple and effective means of achieving reliable PEFC operation at high current densities. However, an in-depth study of the water dynamics within this novel PEFC has not been established. This proposal aims to use the unique benefits of IMAT instruments to provide the first-ever comparison of heterogeneously perforated GDLs and those with homogenous perforations and non-perforated GDLs, synchronising with advanced thermal-electrical mapping. This could significantly and broadly impact academia, R&D, and manufacturers of fuel cell systems.
DOI: 10.5286/isis.e.rb2420524-1
title: Understanding the synergistic activity of antimicrobial polymers with silver sulfadiazine

description: Multidrug resistant bacteria are one of the major causes of death in humans. Recently, we have investigated cationic polymers alternatives to small molecule antibiotics, to which resistance is easily acquired, and antimicrobial peptides, where poor bioavailability, high toxicity and synthetic expense hinder their clinical application. We have now identified a strong synergistic relationship between our guanidinium-containing antimicrobial polymers (GD-50) and the pre-existing antibiotic silver sulfadiazine (Ag-SD), typically applied to topical infections afflicting burn wounds. This synergistic activity suggests there is a beneficial interaction between the two compounds, enhancing combined potency by a larger-than-additive degree through a modified mechanism of action. The implications of determining the nature of this synergy are far-reaching, including allowing treatment of resistant infections, and using lower quantities of both treatments in combination to avoiding the emergence of resistance and reduce the cost of such treatments for wider accessibility. Here, we propose to use NR to gain understanding of this synergistic mechanism of action at the molecular level by determining the nature of the interaction with model of the Gram-negative inner and outer membranes.
DOI: 10.15468/dl.wm2bj9
title: Occurrence Download

description: A dataset containing 1378 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Bidens frondosa L.",
 "Country is Ukraine",
 "HasCoordinate is true"
 ]
}

 The dataset includes 1378 records from 49 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0109286-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.3535/fnf-bty-7xf
title: Schismus barbatus (L.) Thell.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420180
title: Thermal variation of defect association in gadolinium doped ceria.

description: Gadolinium doped ceria (GDC) is currently being used as an oxide ion conducting electrolyte in intermediate temperature (ca. 500-700 deg C) solid oxide fuel cells (SOFCs). Our previous work on GDC samples isotopically enriched with 160Gd (which has a low absorption cross section) at room temperature has revealed evidence of dopant cation-oxide ion vacancy association as well as other local structural features. It is thought that the enthalpy of this association leads to an increased activation energy for conductivity at low temperatures but that at elevated temperatures the mobility of vacancies decreases this effect. Following, a recent study of neodymium doped ceria where this type of association was present but diminished at 600 deg C, we propose a more detailed study of the the thermal variation defect assocation in the technologically relevant system GDC.
DOI: 10.5286/isis.e.rb2420180-1
title: Thermal variation of defect association in gadolinium doped ceria.

description: Gadolinium doped ceria (GDC) is currently being used as an oxide ion conducting electrolyte in intermediate temperature (ca. 500-700 deg C) solid oxide fuel cells (SOFCs). Our previous work on GDC samples isotopically enriched with 160Gd (which has a low absorption cross section) at room temperature has revealed evidence of dopant cation-oxide ion vacancy association as well as other local structural features. It is thought that the enthalpy of this association leads to an increased activation energy for conductivity at low temperatures but that at elevated temperatures the mobility of vacancies decreases this effect. Following, a recent study of neodymium doped ceria where this type of association was present but diminished at 600 deg C, we propose a more detailed study of the the thermal variation defect assocation in the technologically relevant system GDC.
DOI: 10.5286/isis.e.rb2420524
title: Understanding the synergistic activity of antimicrobial polymers with silver sulfadiazine

description: Multidrug resistant bacteria are one of the major causes of death in humans. Recently, we have investigated cationic polymers alternatives to small molecule antibiotics, to which resistance is easily acquired, and antimicrobial peptides, where poor bioavailability, high toxicity and synthetic expense hinder their clinical application. We have now identified a strong synergistic relationship between our guanidinium-containing antimicrobial polymers (GD-50) and the pre-existing antibiotic silver sulfadiazine (Ag-SD), typically applied to topical infections afflicting burn wounds. This synergistic activity suggests there is a beneficial interaction between the two compounds, enhancing combined potency by a larger-than-additive degree through a modified mechanism of action. The implications of determining the nature of this synergy are far-reaching, including allowing treatment of resistant infections, and using lower quantities of both treatments in combination to avoiding the emergence of resistance and reduce the cost of such treatments for wider accessibility. Here, we propose to use NR to gain understanding of this synergistic mechanism of action at the molecular level by determining the nature of the interaction with model of the Gram-negative inner and outer membranes.
DOI: 10.34816/ifao.archives.232873
title: SAQQARA_nb_1994_03351

description: Référence : nb_1994_03351<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/m04-gll-0h9
title: Avena L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/q8g-49j-w7b
title: Hilaria rigida (Thurb.) Benth. ex Scribn.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420077-1
title: Cartilage‐inspired alginate LipoGels: Impact of different liposomes

description: Inspired by the exceptional lubricity in living systems (e.g. knee joints), a physically cross-linked hydrogel has been prepared from sodium alginate, an abundant green biopolymer derived from brown algae. Alginate hydrogels were cross-linked by divalent cations, Ca2+, and liposomes (or lipid vesicles) were embedded into the gel (Fig. 1), aiming to generate a lubricious and self-repairing material, also with the potential for therapeutic inclusion. The lubrication performance of the alginate hydrogels was evaluated with a tribometer (UMT Tribolab), and the results showed that the 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) embedded alginate hydrogel exhibited excellent lubrication with a coefficient of friction (CoF) of 0.022 under water. Furthermore, valuable structural information on the polymer network mesh size ξ (Fig. 1) was obtained from a recent small angle neutron scattering (SANS) experiment at SANS2D. To complete a PhD study (in the 4th year), we propose a SANS investigation of the effect of different types of liposomes with varying headgroup charges and tail lengths/fluidity on the hydrogel structures. The results will offer structural insights into alginate hydrogels embedded with different types of liposomes, enabling a correlation with the mechanical characterisation of the hydrogels using nano-indenter and rheometer. Ultimately, this will underpin the rational design of robust hydrogels with tailored nanostructures for biomimetic lubrication.
DOI: 10.5286/isis.e.rb2420129
title: Probing Effective Spin 1/2 Crystal Field Dynamics in a magnetic insulator NdVO4 via Inelastic Neutron Scattering

description: Three -dimensional spin systems with strong interplay of spin-orbit coupling and non-cubic crystal electric field (CEF) leads to an effective spin Jeff – ½ ground state at low temperatures which offers a platform to realize novel quantum spin liquid (QSL) state and Mott insulating state in case of comparable on-site coulombic interaction (U). In the context of Jeff – ½ magnetic ground state, a rare-earth orthovanadate, NdVO4 is a potential candidate as revealed by basic thermodynamic measurements. Along with this, density functional theory (DFT) studies show the opening of a band gap on inclusion of U, hinting towards Mott-insulating state. Since in NdVO4, Nd3+ has total angular momentum (J) = 9/2 and this ten-fold degenerate state is split into five Kramer doublets by the D2d crystal field. By doing the Inelastic Neutron Scattering (INS) measurements, we want to probe the CEF spectra and directly visualize the magnetic excitations corresponding to the ground state and excited states. By evaluating the integrated intensity as a function of energy at a particular temperature, we wish to find the intensity and position of the excitations. Further, we also want to do simultaneous fit to INS spectra at various temperatures together with the magnetic susceptibility and heat capacity data to obtain the unique set of CEF parameters.
DOI: 10.5286/isis.e.rb2420129-1
title: Probing Effective Spin 1/2 Crystal Field Dynamics in a magnetic insulator NdVO4 via Inelastic Neutron Scattering

description: Three -dimensional spin systems with strong interplay of spin-orbit coupling and non-cubic crystal electric field (CEF) leads to an effective spin Jeff – ½ ground state at low temperatures which offers a platform to realize novel quantum spin liquid (QSL) state and Mott insulating state in case of comparable on-site coulombic interaction (U). In the context of Jeff – ½ magnetic ground state, a rare-earth orthovanadate, NdVO4 is a potential candidate as revealed by basic thermodynamic measurements. Along with this, density functional theory (DFT) studies show the opening of a band gap on inclusion of U, hinting towards Mott-insulating state. Since in NdVO4, Nd3+ has total angular momentum (J) = 9/2 and this ten-fold degenerate state is split into five Kramer doublets by the D2d crystal field. By doing the Inelastic Neutron Scattering (INS) measurements, we want to probe the CEF spectra and directly visualize the magnetic excitations corresponding to the ground state and excited states. By evaluating the integrated intensity as a function of energy at a particular temperature, we wish to find the intensity and position of the excitations. Further, we also want to do simultaneous fit to INS spectra at various temperatures together with the magnetic susceptibility and heat capacity data to obtain the unique set of CEF parameters.
DOI: 10.3535/0hr-vhe-wc5
title: Avena L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/fvm-k3z-p37
title: Coriaria ruscifolia L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420077
title: Cartilage‐inspired alginate LipoGels: Impact of different liposomes

description: Inspired by the exceptional lubricity in living systems (e.g. knee joints), a physically cross-linked hydrogel has been prepared from sodium alginate, an abundant green biopolymer derived from brown algae. Alginate hydrogels were cross-linked by divalent cations, Ca2+, and liposomes (or lipid vesicles) were embedded into the gel (Fig. 1), aiming to generate a lubricious and self-repairing material, also with the potential for therapeutic inclusion. The lubrication performance of the alginate hydrogels was evaluated with a tribometer (UMT Tribolab), and the results showed that the 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) embedded alginate hydrogel exhibited excellent lubrication with a coefficient of friction (CoF) of 0.022 under water. Furthermore, valuable structural information on the polymer network mesh size ξ (Fig. 1) was obtained from a recent small angle neutron scattering (SANS) experiment at SANS2D. To complete a PhD study (in the 4th year), we propose a SANS investigation of the effect of different types of liposomes with varying headgroup charges and tail lengths/fluidity on the hydrogel structures. The results will offer structural insights into alginate hydrogels embedded with different types of liposomes, enabling a correlation with the mechanical characterisation of the hydrogels using nano-indenter and rheometer. Ultimately, this will underpin the rational design of robust hydrogels with tailored nanostructures for biomimetic lubrication.
DOI: 10.5286/isis.e.rb2420165
title: SANS to reveal the Effect of Fatty Alcohol on APG Surfactant Triton® CG 110

description: The global demand for surfactants, crucial in various industries, has driven the exploration of eco-friendly options like alkyl polyglucoside (APG) surfactants. In particular, Triton® CG 110, an APG surfactant, was studied in synergy with fatty alcohol (C12OH) for its behavior in different formulations. This research focused on the impact of 1-dodecanol on Triton® CG 110, altering its micellar phase and oil-uptake abilities. SANS and Rheo-SANS at ISIS will be employed to analyze the surfactant's structure and to localize the C12OH under stationary conditions. Preliminary results indicated potential tailored applications due to intriguing transitions in rheological behavior.
This study not only advances APG surfactant knowledge but also offers vital insights into surfactant concentration and co-surfactant effects. These findings contribute significantly to developing sustainable, biodegradable materials, addressing environmental concerns linked to conventional surfactants.
DOI: 10.5286/isis.e.rb2420165-1
title: SANS to reveal the Effect of Fatty Alcohol on APG Surfactant Triton® CG 110

description: The global demand for surfactants, crucial in various industries, has driven the exploration of eco-friendly options like alkyl polyglucoside (APG) surfactants. In particular, Triton® CG 110, an APG surfactant, was studied in synergy with fatty alcohol (C12OH) for its behavior in different formulations. This research focused on the impact of 1-dodecanol on Triton® CG 110, altering its micellar phase and oil-uptake abilities. SANS and Rheo-SANS at ISIS will be employed to analyze the surfactant's structure and to localize the C12OH under stationary conditions. Preliminary results indicated potential tailored applications due to intriguing transitions in rheological behavior.
This study not only advances APG surfactant knowledge but also offers vital insights into surfactant concentration and co-surfactant effects. These findings contribute significantly to developing sustainable, biodegradable materials, addressing environmental concerns linked to conventional surfactants.
DOI: 10.34816/ifao.archives.232874
title: SAQQARA_nb_1994_03352

description: Référence : nb_1994_03352<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/he1-k9y-vxf
title: Avena barbata Pott ex Link

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/s6n-h01-lc9
title: Lomatia ferruginea (Cav.) R. Br.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420038
title: An INS investigation on the effect of a regeneration cycle for post-reaction Fe-modified ZSM5 catalysts applied to xylene isomerization reactions (TOSCA)

description: The global demand for p-xylene production is considerable. One production route involves the use of ZSM5 zeolites to affect the isomerisation of m-xylene to p-xylene. However, catalyst deactivation constitutes a significant impediment to the process operation. In partnership with a major catalyst manufacturer, this application seeks to use the TOSCA spectrometer to examine the effect of a regeneration cycle on a series of new Fe-doped ZSM5 catalyst formulations under development. Carbon deposition as a function of time-on-stream results in a significant reduction of activity, necessitating the zeolite to experience an oxidative treatment to burn off the ‘coke’. Laboratory testing has established that discrete Fe loadings can induce ‘soft’ coke formation (reversible via regeneration) over ‘hard’ coke (irreversible). However, the durability of the Fe-doped catalysts with respect to the regeneration treatment is uncertain. TOSCA beamtime is requested to analyse a selection of post-reaction samples after deployment of a regeneration stage. This procedure will provide spectral insight as to how the regeneration stage perturbs the catalysts’ acid site distribution, with particular emphasis on strong Brønsted acid sites. Further measurement of the samples after a second reaction sequence will be used to speciate the form of the hydrocarbonaceous species that results post-regeneration. This TOSCA application is linked to an associated MAPS proposal.
DOI: 10.5286/isis.e.rb2420038-1
title: An INS investigation on the effect of a regeneration cycle for post-reaction Fe-modified ZSM5 catalysts applied to xylene isomerization reactions (TOSCA)

description: The global demand for p-xylene production is considerable. One production route involves the use of ZSM5 zeolites to affect the isomerisation of m-xylene to p-xylene. However, catalyst deactivation constitutes a significant impediment to the process operation. In partnership with a major catalyst manufacturer, this application seeks to use the TOSCA spectrometer to examine the effect of a regeneration cycle on a series of new Fe-doped ZSM5 catalyst formulations under development. Carbon deposition as a function of time-on-stream results in a significant reduction of activity, necessitating the zeolite to experience an oxidative treatment to burn off the ‘coke’. Laboratory testing has established that discrete Fe loadings can induce ‘soft’ coke formation (reversible via regeneration) over ‘hard’ coke (irreversible). However, the durability of the Fe-doped catalysts with respect to the regeneration treatment is uncertain. TOSCA beamtime is requested to analyse a selection of post-reaction samples after deployment of a regeneration stage. This procedure will provide spectral insight as to how the regeneration stage perturbs the catalysts’ acid site distribution, with particular emphasis on strong Brønsted acid sites. Further measurement of the samples after a second reaction sequence will be used to speciate the form of the hydrocarbonaceous species that results post-regeneration. This TOSCA application is linked to an associated MAPS proposal.
DOI: 10.5286/isis.e.rb2490291-1
title: Crystal field excitations in Ce2Rh3Ge5
DOI: 10.3535/l5f-d76-dp3
title: Nassella cernua (Stebbins & Love) Barkworth

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2400049-1
title: Determination of zero-field magnetic structure of antiferromagnetic EuSnP

description: Based on magnetization and magnetotransport data, antiferromagnetic EuSnP is considered a possible skyrmionic lattice, despite its centrosymmetric crystal structure. To verify this tempting conjecture, neutron diffraction or resonant elastic X-ray scattering studies in an external magnetic field of about 2 T should be carried out. However, a prerequisite for such experiments is knowledge of the magnetic wave vector in zero magnetic field. The aim of this proposal is to determine the zero-field magnetic wave vector and magnetic structure of EuSnP at a temperature of 5 K using the SXD diffractometer at ISIS Facility.
DOI: 10.5286/isis.e.rb2469100
title: SANS study of the (V,Ti)C precipitation kinetics in Nanosteels

description: Nano-steels are a new generation of Advanced High Strength Steels (AHSS) that are especially suited for lightweight automotive applications. The matrix of the steel, which provides ductility and stretch, is significantly strengthened by 30-50% as a result of the formation of nanometre-sized precipitates. These steels contain different microalloying additions, such as vanadium (V) and titanium (Ti), which form the nano-precipitates. A resource-efficient use of these alloying additions requires further knowledge on the formation kinetics of these nanometre-sized vanadium and titanium containing carbides. The formation of these nanoscale (V,Ti)C precipitates can be achieved by two mechanisms: (a) random precipitation from supersaturated ferrite and/or (b) interphase precipitation. Our previous studies have focused on the formation of VC precipitates. In this experiment we want to explore the effect of Ti substitution, which is expected to enhance nucleation. Our aim is to measure the random (V,Ti)C precipitation kinetics in NANO-steel by SANS and elucidate the effects of Ti addition for both interface and random precipitation.
DOI: 10.5286/isis.e.rb2469100-1
title: SANS study of the (V,Ti)C precipitation kinetics in Nanosteels

description: Nano-steels are a new generation of Advanced High Strength Steels (AHSS) that are especially suited for lightweight automotive applications. The matrix of the steel, which provides ductility and stretch, is significantly strengthened by 30-50% as a result of the formation of nanometre-sized precipitates. These steels contain different microalloying additions, such as vanadium (V) and titanium (Ti), which form the nano-precipitates. A resource-efficient use of these alloying additions requires further knowledge on the formation kinetics of these nanometre-sized vanadium and titanium containing carbides. The formation of these nanoscale (V,Ti)C precipitates can be achieved by two mechanisms: (a) random precipitation from supersaturated ferrite and/or (b) interphase precipitation. Our previous studies have focused on the formation of VC precipitates. In this experiment we want to explore the effect of Ti substitution, which is expected to enhance nucleation. Our aim is to measure the random (V,Ti)C precipitation kinetics in NANO-steel by SANS and elucidate the effects of Ti addition for both interface and random precipitation.
DOI: 10.3535/8z8-cjw-073
title: Apiaceae Lindl.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tbz-043-clb
title: Mimulus alatus Aiton

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