cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.5286/isis.e.rb2510412-1
title: Determining crystalline phases formed by iron and sulphur in wood samples from ancient waterlogged shipwrecks through neutron diffraction

description: This proposal focuses on the treatment of degraded wood from ancient waterlogged shipwrecks, damaged by the formation of acid precursors such as pyrite due to anaerobic bacterial activity. These compounds can oxidize, producing sulfuric acid, which further degrades the wood. To counteract this, we are exploring the use of Calcium Hydroxide Nanoparticles (CH-NPs) for their deacidifying and stabilizing properties, aiming to neutralize acidic conditions and prevent further damage. The main objective is to assess the distribution and quantity of iron and sulfur compounds within the wood, which is essential for optimizing the treatment. Neutron diffraction, a non-destructive technique, plays a key role in this study. It allows the identification and quantification of crystalline phases such as pyrite, greigite, and marcasite, providing information about their depth and extent. This technique enables internal structural analysis without altering the samples. We will perform measurements on three wood samples, both before and after artificial acidification, to monitor changes in sulfur-containing phases and their transformation into sulfuric acid. This will help us trace the penetration of acidic precursors and determine the optimal depth for nanoparticle treatment. Understanding the distribution of these compounds will enhance the effectiveness of the treatment, ensuring the long-term preservation of the artefacts.
DOI: 10.5286/isis.e.rb2590020-1
title: Crystal test of FeNb3S6
DOI: 10.3535/rlh-atq-kz0
title: Drimys winteri J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/wdb-gv0-f3g
title: Astragalus crassicarpus var. berlandieri Barneby

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420154
title: INS STUDY OF NITROGEN FUNCTIONAL GROUPS ON CARBON DOTS (CDs) - TOSCA

description: This research aims to elucidate the nitrogen configuration and positions that affect the photothermal properties of Carbon Dots (CDs). Specifically, the elucidation of the mid-site nitrogen configuration (pyrrolic-N) was expected to be distinguished by neutron techniques. This investigation is crucial for developing CDs with remarkable photothermal ability for applications like cancer treatment and sunlight for water evaporation. We plan to use a combination of techniques, including MAPS and TOSCA, to understand how different nitrogen configurations (Nitrogen site) affect how CDs absorb light and convert it into heat. To characterize how nitrogen is embedded in the CD, we will calculate the INS spectra of a range of models that have nitrogen in different sites and different proportions. By studying six different samples of CDs with varying amounts of a specific type of nitrogen, called pyrrolic-N, we hope to find the best nitrogen setup that boosts the CDs' ability to turn light into heat. This research could lead to significant advancements in using CDs for medical and energy-related purposes.
DOI: 10.5286/isis.e.rb2420154-1
title: INS STUDY OF NITROGEN FUNCTIONAL GROUPS ON CARBON DOTS (CDs) - TOSCA

description: This research aims to elucidate the nitrogen configuration and positions that affect the photothermal properties of Carbon Dots (CDs). Specifically, the elucidation of the mid-site nitrogen configuration (pyrrolic-N) was expected to be distinguished by neutron techniques. This investigation is crucial for developing CDs with remarkable photothermal ability for applications like cancer treatment and sunlight for water evaporation. We plan to use a combination of techniques, including MAPS and TOSCA, to understand how different nitrogen configurations (Nitrogen site) affect how CDs absorb light and convert it into heat. To characterize how nitrogen is embedded in the CD, we will calculate the INS spectra of a range of models that have nitrogen in different sites and different proportions. By studying six different samples of CDs with varying amounts of a specific type of nitrogen, called pyrrolic-N, we hope to find the best nitrogen setup that boosts the CDs' ability to turn light into heat. This research could lead to significant advancements in using CDs for medical and energy-related purposes.
DOI: 10.5286/isis.e.rb2510723
title: Emulsion droplets of Le Pastis: Investigating the micrometer range

description: Ouzo-effect emulsion droplets have been studied by conventional SANS in the past, but their ability to accurately determine the size of the droplets was limited by the overall size of the droplets being greater than the resolvable maximum size of the instruments. In this proposal, spin-echo SANS (SESANS) will be used to size droplets in a model ouzo-effect emulsion (Le Pastis), which should enable the determination of the entire size distribution because of the ability of SESANS to measure correlations up to ~20 µm. Preliminary SESANS measurements on another emulsion (limoncello) show that this should be possible. The emulsions will be studied as a function of composition, temperature, and time. Altogether, the results will provide illuminating information about the process of ouzo-effect emulsification and will provide valuable experience to support my research into emulsions using neutron scattering.
DOI: 10.5286/isis.e.rb2510723-1
title: Emulsion droplets of Le Pastis: Investigating the micrometer range

description: Ouzo-effect emulsion droplets have been studied by conventional SANS in the past, but their ability to accurately determine the size of the droplets was limited by the overall size of the droplets being greater than the resolvable maximum size of the instruments. In this proposal, spin-echo SANS (SESANS) will be used to size droplets in a model ouzo-effect emulsion (Le Pastis), which should enable the determination of the entire size distribution because of the ability of SESANS to measure correlations up to ~20 µm. Preliminary SESANS measurements on another emulsion (limoncello) show that this should be possible. The emulsions will be studied as a function of composition, temperature, and time. Altogether, the results will provide illuminating information about the process of ouzo-effect emulsification and will provide valuable experience to support my research into emulsions using neutron scattering.
DOI: 10.34816/ifao.archives.232910
title: SAQQARA_nb_1994_05964

description: Référence : nb_1994_05964<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/rjw-26s-41l
title: Astragalus canadensis L.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/tct-v00-he2
title: Drimys winteri J. R. Forst. & G. Forst.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420353
title: Understanding hydration water at pectin-aqueous glycerol interfaces

description: Pectin is a common plant block copolymer, which exhibits unique viscoelastic properties shaped by its structural conformation through interactions with the solvent, in this case water and glycerol. This study investigates how a co-solvent, i.e., glycerol, influences hydration water at the pectin-solvent interface using quasi-elastic neutron scattering across varying solvent compositions. This polymer's distinctive 'bottlebrush' structure also offers valuable insights that can extend our understanding of other 'goopy' biopolymers like mucins which forms mucous. The results will guide the design principles for biomaterials and contribute to advancing our comprehension of biopolymer physics.
DOI: 10.5286/isis.e.rb2420353-1
title: Understanding hydration water at pectin-aqueous glycerol interfaces

description: Pectin is a common plant block copolymer, which exhibits unique viscoelastic properties shaped by its structural conformation through interactions with the solvent, in this case water and glycerol. This study investigates how a co-solvent, i.e., glycerol, influences hydration water at the pectin-solvent interface using quasi-elastic neutron scattering across varying solvent compositions. This polymer's distinctive 'bottlebrush' structure also offers valuable insights that can extend our understanding of other 'goopy' biopolymers like mucins which forms mucous. The results will guide the design principles for biomaterials and contribute to advancing our comprehension of biopolymer physics.
DOI: 10.3535/b4t-320-j3r
title: Discaria Hook.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/v7n-yhj-7vp
title: Discaria Hook.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2510088
title: The structure of CaO–B2O3–P2O5 glasses

description: Boron oxide-containing bioactive glasses are noteworthy due to their unique properties and potential in biomedical applications. Boron plays a crucial role in various biological processes, and its deficiency has been associated with delayed bone growth. Boron-based bioactive glasses can be used as drug delivery systems for treating infections and conditions such as osteoporosis. They exhibit superior bioactivity and greater potential for bone healing compared to traditional silicate glasses.
Alkali borophosphate glasses have recently been investigated using Raman spectroscopic and ¹¹B and ³¹P MAS-NMR measurements [1]. It was shown that an increase in both alkali and borate content improves ionic conductivity. CaO–B₂O₃–P₂O₅ glasses were studied by Raman and infrared spectroscopy [2] and it was concluded that increasing the B₂O₃ content enhances the bioactivity of the glasses
Although several studies have been devoted to the structure and physical properties of boron-containing glasses [3–6], the connection between composition-induced structural changes and the bioactivity of the glasses is still not completely understood. The aim of our investigations is to obtain a reliable picture of both the B2O3-P2O5 host network and the environment of Ca (including Ca-cation and Ca-O correlations). To reach this goal we intend to combine a wide range of experimental techniques (neutron- and X-ray diffraction, IR, Raman, x-ray absorption spectroscopy) with classical molecular dynamics
DOI: 10.5286/isis.e.rb2510088-1
title: The structure of CaO–B2O3–P2O5 glasses

description: Boron oxide-containing bioactive glasses are noteworthy due to their unique properties and potential in biomedical applications. Boron plays a crucial role in various biological processes, and its deficiency has been associated with delayed bone growth. Boron-based bioactive glasses can be used as drug delivery systems for treating infections and conditions such as osteoporosis. They exhibit superior bioactivity and greater potential for bone healing compared to traditional silicate glasses.
Alkali borophosphate glasses have recently been investigated using Raman spectroscopic and ¹¹B and ³¹P MAS-NMR measurements [1]. It was shown that an increase in both alkali and borate content improves ionic conductivity. CaO–B₂O₃–P₂O₅ glasses were studied by Raman and infrared spectroscopy [2] and it was concluded that increasing the B₂O₃ content enhances the bioactivity of the glasses
Although several studies have been devoted to the structure and physical properties of boron-containing glasses [3–6], the connection between composition-induced structural changes and the bioactivity of the glasses is still not completely understood. The aim of our investigations is to obtain a reliable picture of both the B2O3-P2O5 host network and the environment of Ca (including Ca-cation and Ca-O correlations). To reach this goal we intend to combine a wide range of experimental techniques (neutron- and X-ray diffraction, IR, Raman, x-ray absorption spectroscopy) with classical molecular dynamics
DOI: 10.5286/isis.e.rb2510418
title: Field evolution of the triangular spin-liquid candidate KYbS2

description: We propose single-crystal neutron diffraction experiment on the triangular spin-liquid candidate KYbS2. We will probe the nature of three field-induced ordered states detected in our thermodynamic measurements and also study the evolution of the magnetic Bragg peaks toward zero field where quantum spin-liquid state is expected, but a 2D ordered state can not be ruled out. Additionally, we will probe the evolution of the lattice in the temperature range around 0.5 K where conventional scaling between heat capacity and thermal expansion breaks down. Our results will help to evaluate the spin-liquid candidacy of KYbS2.
DOI: 10.5286/isis.e.rb2510418-1
title: Field evolution of the triangular spin-liquid candidate KYbS2

description: We propose single-crystal neutron diffraction experiment on the triangular spin-liquid candidate KYbS2. We will probe the nature of three field-induced ordered states detected in our thermodynamic measurements and also study the evolution of the magnetic Bragg peaks toward zero field where quantum spin-liquid state is expected, but a 2D ordered state can not be ruled out. Additionally, we will probe the evolution of the lattice in the temperature range around 0.5 K where conventional scaling between heat capacity and thermal expansion breaks down. Our results will help to evaluate the spin-liquid candidacy of KYbS2.
DOI: 10.34816/ifao.archives.232911
title: SAQQARA_nb_1994_05965

description: Référence : nb_1994_05965<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/3dm-l42-d2k
title: Discaria Hook.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420046
title: An INS investigation on the effect of a regeneration cycle for post-reaction Fe-modified ZSM5 catalysts applied to xylene isomerisation reactions (MAPS)

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 (Johnson Matthey), this application seeks to use the MAPS 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.

MAPS beamtime is requested to analyse a selection of post-reaction samples after 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 MAPS application is linked to an associated TOSCA proposal.
DOI: 10.5286/isis.e.rb2420046-1
title: An INS investigation on the effect of a regeneration cycle for post-reaction Fe-modified ZSM5 catalysts applied to xylene isomerisation reactions (MAPS)

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 (Johnson Matthey), this application seeks to use the MAPS 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.

MAPS beamtime is requested to analyse a selection of post-reaction samples after 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 MAPS application is linked to an associated TOSCA proposal.
DOI: 10.3535/9tk-zr6-f6h
title: Marchantiaceae Lindl.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.3535/fnt-1k0-gf0
title: Riccardia prehensilis (Hook. f. & Taylor) C. Massal.

description: Digital Specimen for the physical specimen hosted at Botanic Garden and Botanical Museum Berlin.
DOI: 10.5286/isis.e.rb2420182
title: Paclitaxel delivery using lipid-based nanostructured drug carriers

description: Cancer is one of the leading causes of mortality worldwide, accounting for one in six deaths. This disease affects individuals of all ages and ethnic backgrounds, presenting a significant challenge to global public health. The main challenges in breast cancer (BC) chemotherapy are related to drug resistance, especially in the case of triple-negative BC. Nanotechnology strategies can improve the efficacy of chemotherapy by promoting sustained release and reducing systemic toxicity through drug delivery systems (DDS).This project aims to characterize, using Small Angle Neutron Scattering (SANS), nanostructured lipid carriers (NLC) containing β-caryophyllene (BCP) as a functional excipient (with anticancer and analgesic effects) and the taxane paclitaxel (PTX) as an experimental co-administration strategy to increase the bioavailability and reduce the toxicity of PTX. This study will contribute to the development of a new pharmaceutical formulation based on nanotechnology that is more effective and less toxic than commercially available PTX formulations, with the aim of improving the prognosis and quality of life of patients with BC.
DOI: 10.5286/isis.e.rb2420182-1
title: Paclitaxel delivery using lipid-based nanostructured drug carriers

description: Cancer is one of the leading causes of mortality worldwide, accounting for one in six deaths. This disease affects individuals of all ages and ethnic backgrounds, presenting a significant challenge to global public health. The main challenges in breast cancer (BC) chemotherapy are related to drug resistance, especially in the case of triple-negative BC. Nanotechnology strategies can improve the efficacy of chemotherapy by promoting sustained release and reducing systemic toxicity through drug delivery systems (DDS).This project aims to characterize, using Small Angle Neutron Scattering (SANS), nanostructured lipid carriers (NLC) containing β-caryophyllene (BCP) as a functional excipient (with anticancer and analgesic effects) and the taxane paclitaxel (PTX) as an experimental co-administration strategy to increase the bioavailability and reduce the toxicity of PTX. This study will contribute to the development of a new pharmaceutical formulation based on nanotechnology that is more effective and less toxic than commercially available PTX formulations, with the aim of improving the prognosis and quality of life of patients with BC.
DOI: 10.5286/isis.e.rb2420326
title: Crystal field excitations in the spin liquid candidate on a stuffed honeycomb lattice antiferromagnet:TbBO3

description: Quantum spin liquids (QSL) represent a highly entangled state of matter which lacks long-range magnetic order, despite strong exchange interactions between its magnetic constituents. QSLs are ideal hosts of exotic fractional quantum numbers coupled to emergent gauge fields and hold tantalizing prospects for applications in fault-tolerant quantum computing. The experimental realization of QSLs in 2D spin-lattice remains elusive in view of the presence of defects and anti-site disorder in real materials. Rare-earth based frustrated magnets offer a new route to realize the elusive QSL state with fractional magnetic excitations. Our focus is on a “stuffed honeycomb lattice” TbBO3 comprised of a honeycomb lattice with a superimposed triangular lattice formed by additional magnetic ions at the centre of each hexagon, that can support exotic quantum phenomena, including Dirac QSL. Our muon experiments down to 16 mK rule out the presence of magnetic ordering and spin freezing. Specific heat down to 100 mK shows no signature of magnetic ordering and specific heat shows power law behavior indicative of gapless spin excitations. NMR results suggest the presence of unconventional spin excitations in TbBO3. We propose to carry out inelastic neutron scattering (INS) studies to investigate the crystal field excitations to probe their energy and wave functions, which will shed light on the QSL state.
DOI: 10.5286/isis.e.rb2420326-1
title: Crystal field excitations in the spin liquid candidate on a stuffed honeycomb lattice antiferromagnet:TbBO3

description: Quantum spin liquids (QSL) represent a highly entangled state of matter which lacks long-range magnetic order, despite strong exchange interactions between its magnetic constituents. QSLs are ideal hosts of exotic fractional quantum numbers coupled to emergent gauge fields and hold tantalizing prospects for applications in fault-tolerant quantum computing. The experimental realization of QSLs in 2D spin-lattice remains elusive in view of the presence of defects and anti-site disorder in real materials. Rare-earth based frustrated magnets offer a new route to realize the elusive QSL state with fractional magnetic excitations. Our focus is on a “stuffed honeycomb lattice” TbBO3 comprised of a honeycomb lattice with a superimposed triangular lattice formed by additional magnetic ions at the centre of each hexagon, that can support exotic quantum phenomena, including Dirac QSL. Our muon experiments down to 16 mK rule out the presence of magnetic ordering and spin freezing. Specific heat down to 100 mK shows no signature of magnetic ordering and specific heat shows power law behavior indicative of gapless spin excitations. NMR results suggest the presence of unconventional spin excitations in TbBO3. We propose to carry out inelastic neutron scattering (INS) studies to investigate the crystal field excitations to probe their energy and wave functions, which will shed light on the QSL state.
DOI: 10.15468/dl.a3g5dj
title: Occurrence Download

description: A dataset containing 25 species occurrences available in GBIF matching the query:
{
 "and" : [
 "TaxonKey is Rosa canina L.",
 "Country is Latvia",
 "HasCoordinate is true"
 ]
}

 The dataset includes 25 records from 2 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0109289-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.34816/ifao.archives.232912
title: SAQQARA_nb_1994_05966

description: Référence : nb_1994_05966<br />Site : Saqqara<br />Secteur : Mastaba de Ti<br />Type : photographie<br />
DOI: 10.3535/4g5-tck-19e
title: Plagiochila elata Taylor

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