1401 research outputs found
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Dataset associated with "Volcanic ash ice-nucleating activity can be enhanced or depressed by ash-gas interaction in the eruption plume"
No full textVolcanic ash can trigger ice nucleation when immersed in supercooled water, impacting several processes in the eruption plume/cloud and the wider atmosphere upon ash dispersal. The experimental study associated with this dataset explores how interaction with magmatic gases in the hot eruption plume, which inevitably alters the surface properties of ash, may affect the ice-nucleating activity (INA) of ash. We show that the INA of tephra is raised by exposure to H2O(g) mixed with SO2(g) at 800-400 °C, but is substantially reduced by exposure to H2O(g) alone or mixed with HCl(g) at the same temperatures. In contrast, the INA of K-feldspar and quartz is reduced by all three treatments. A decrease in INA after heating with H2O(g) might relate to a loss of ice-active sites by surface dehydroxylation and/or oxidation. On the tephra surfaces, metal chloride or sulphate salts form in the presence of HCl(g) or SO2(g), respectively. While NaCl and CaCl2 seem to have no effect on the tephra INA, CaSO4 is inferred to create ice-active sites, potentially through a particular combination of surface chemistry and topography. Together, these findings suggest a complex interplay of bulk mineralogy and surface alteration in influencing ice nucleation by volcanic ash, and highlight the general sensitivity of ash INA to interaction with gases at high temperatures in the eruption plume
Leeds hyperspectral pavement crack images
No full textThis materials contains a dataset of 50 hyperspectral images captured for road pavement cracks in the ENVI format.
The crack dataset are captured in St Helens Lane north of Leeds city at post code LS16 8JJ at August 2020
Data to support study of Structural transformations and spin-crossover in [FeL2]2+ salts (L = 4-{tertbutylsulfanyl}-2,6-di{pyrazol-1-yl}pyridine) − the influence of bulky ligand substituents
Get PDFDesolvation of [FeL2][BF4]2·xMeNO2 occurs via an intermediate phase, exhibiting hysteretic spin-crossover (SCO) with a reverse step in its warming branch. Incomplete SCO in the final product phase reflects disorder of an L ligand. [FeL2][BF4]2·yMe2CO contains five complex cations per asymmetric unit, four of which undergo gradual SCO in at least two discrete steps
Phase Boundary Exchange Coupling in the Mixed Magnetic Phase Regime of a Pd-doped FeRh Epilayer - dataset.
No full textData associated with the manuscript 'Phase Boundary Exchange Coupling in the Mixed Magnetic Phase Regime of a Pd-doped FeRh Epilayer
Seasonal vegetation and management influence overland flow velocity in upland grasslands - dataset
Get PDFCollated measured data from overland flow hillslope flume fieldwork in Swindale, Lake District, UK. Data includes mean flow velocity, mean flow depth, slope angle, flume length, Darcy-weisbach roughness and habitat description. All data collected in 2019
Dataset associated with "Isotropic liquid crystal elastomers as exceptional photoelastic strain sensors"
No full textIsotropic elastomeric materials containing liquid crystalline mesogenic unit are shown to have exceptionally large photoelastic constants and compliances that outperform commercially available photoelastic sensor materials. This dataset contains the data from various forms of tensile mechanical testing performed on the new materials developed. In these tests, the strain-induced ordering of the mesogenic units was monitored using birefringence measurements, polarised Raman spectroscopy and the guest-host dye effect
Data associated with 'One-step Preparation of Biocompatible Gold Nanoplates with Controlled Thickness and Adjustable Optical Properties for Plasmon-based Applications'
No full textThe ability to synthesize plasmonic nanomaterials with well-defined structures and tailorable size is crucial for exploring their potential applications. Gold nanoplates (AuNPLs) exhibit appealing structural and optical properties, yet their applications are limited by difficulties in thickness control. Other challenges include a narrow range of tunability in size and surface plasmon resonance (SPR), combined with a synthesis conventionally involving cytotoxic cetyltrimethylammonium (CTA) halide surfactant. Here, a one-step, high-yield synthesis of single-crystalline AuNPLs has been developed, based on the combined use of two structure-directing agents, methyl orange and FeBr3, which undergo preferential adsorption onto different crystalline facets of gold. The obtained AuNPLs feature high shape homogeneity that enables mesoscopic self-assembly, broad-range tunability of dimensions (controlled thickness from ∼7 to ∼20 nm, accompanied by modulation of the edge length from ~150 nm to ~2 μm) and plasmonic properties. These merits, coupled with a preparation free of CTA-halide surfactants, have facilitated the exploration of various uses especially in bio-related areas. For example, they have been demonstrated as biocompatible photothermal agents for cell ablation in NIR-I and II windows. This work paves the way to the innovative fabrication of anisotropic plasmonic nanomaterials with desired attributes for wide-ranging practical applications
Axonemal Dynein FFEA
No full textThe molecular motor flagellar dynein causes the macroscopic motion of axonemal structures, such as those present in the tails of sperm. However, each motor exists within a tightly packed environment, suspended between two microtubule structures. To simulate those motor in it's crowded environment, and reproduce published results, we present a set of input files to be used with the Fluctuating Finite Element Analysis (FFEA) software package
Data associated with 'Reaction Rate Governs the Viscoelasticity and Nanostructure of Folded Protein Hydrogels'
No full textHydrogels constructed from folded protein domains are of increasing interest as resilient and responsive biomaterials, but their optimisation for applications requires time-consuming and costly molecular design. Here, we explore a complementary approach to control their properties by examining the influence of crosslinking rate on the structure and viscoelastic response of a model hydrogel constructed from photo-chemically crosslinked bovine serum albumin (BSA). Gelation is observed to follow a heterogeneous nucleation pathway in which BSA monomers crosslink into compact nuclei that grow into fractal percolated networks. Both the viscoelastic response probed by shear rheology and the nanostructure probed by small angle x-ray scattering (SAXS) is shown to depend on the photochemical crosslinking reaction rate, with increased reaction rates corresponding to higher viscoelastic moduli, lower fractal dimension and higher fractal cluster size. Reaction rate dependent changes are shown to be consistent with a transition between diffusion- and rate- limited assembly and the corresponding changes to viscoelastic response are proposed to arise from the presence of non-fractal depletion regions, as confirmed by SAXS. This controllable nanostructure and viscoelasticity constitutes a potential route for the precise control of hydrogel properties, without the need for molecular modification
User Manual: Waste Flow Diagram (WFD): A rapid assessment tool for mapping waste flows and quantifying plastic leakage. Version 1.0.
Get PDFThe Waste Flow Diagram user manual provides an explanation of the Waste Flow Diagram toolkit and in-depth guidance on how to apply it. This includes information on data collection issues, how to estimate plastic leakages, how to run scenarios, and how to visualise the waste flows