1401 research outputs found
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Dataset associated with "Volcanic ash ice nucleation activity is variably reduced by aging in water and sulfuric acid: the effects of leaching, dissolution, and precipitation"
No full textVolcanic ash nucleates ice when immersed in supercooled water, giving it the potential to influence weather and climate from local to global scales. However, the ice nucleation activity (INA) of ash can be modified by interaction with various chemical species during atmospheric transport. In the experimental study associated with this dataset, we show that the INA of two mineralogically distinct ash samples from Fuego and Astroni volcanoes is variably reduced when immersed in water or aqueous sulfuric acid for minutes to days. Aging in water decreases the INA of both ash samples by up to two orders of magnitude, possibly due to a reduction in surface crystallinity and cation availability accompanying leaching. Aging in sulfuric acid leads to minimal loss of INA for Fuego ash, which is proposed to reflect a quasi-equilibrium between leaching that removes ice-active sites and dissolution that reveals or creates new ones on the pyroxene phases present. Conversely, exposure to sulfuric acid reduces the INA of Astroni ash by one to two orders of magnitude, potentially due to selective dissolution of ice-active sites associated with surface microtextures on some K-feldspar phases. Analysis of dissolved element concentrations in the aged ash leachates indicates supersaturation of select mineral species which might have precipitated and so also contributed to altering the INA of the ash. These results highlight the key role that leaching, dissolution, and precipitation likely play in the aqueous aging of volcanic ash with respect to its INA
Data associated with 'Effects of oral lubrication on satiety, satiation and salivary biomarkers in model foods: A pilot study'
No full textRaw data for all figures in the associated paper 'Effects of oral lubrication on satiety, satiation and salivary biomarkers in model foods: A pilot study
In-silico trial of intracranial flow diverters replicates and expands insights from conventional clinical trials
No full textSource data for Tables 1-6 and raw simulation output
Ginger pasta satiety - raw data
No full textGinger is attributed with beneficial bioactivities including appetite suppression. We wanted to test the hypothesis that enriching wheat pasta with ginger powder would lead to sensory-associated satiety in humans.Ten healthy subjects consumed two samples of equal weight: control and ginger-enriched pasta (3%), on two occasions. Subjective feelings of satiety were assessed pre-consumption, immediately after and for 2 h post-consumption using a 7-point intensity scale. Results show that the ginger pasta sample had a similar satiety response compared to the control pasta up to 2 h after consumption. The results of this trial are reported in Wu, M., Gani, H., Viney, S., Ho, P. and Orfila, C. (2021), Effect of ginger-enriched pasta on acceptability and satiety. Int J Food Sci Technol. https://doi.org/10.1111/ijfs.1526
Dataset for the study of Ultrafast energy transfer between lipid-linked chromophores and plant Light-Harvesting Complex II
No full textThis dataset shows the raw data, analysed data and documentation related to figures and tables from the study “Ultrafast energy transfer between lipid-linked chromophores and plant Light-Harvesting Complex II". This includes: absorbance and fluorescence spectra; molecular dynamics images and associated files; calculations of excitation energy transfer; other graphical analyses; tabulated numerical data
Dataset associated with 'Biomimetic curvature and tension-driven membrane fusion by silica nanoparticles’
No full textExperimental data obtained from FRET spectroscopy and confocal microscopy imaging of lipid vesicles interacting with silica nanoparticles. Experimental set up and data processing and analysis described in the publication in Langmuir. Confocal microscopy movies of giant unilamellar vesicles undergoing fusion upon interaction with silica nanoparticles
Dataset associated with 'Autothermal reforming of acetic acid to hydrogen and syngas on Ni and Rh catalysts'
No full textRaw data for all figures in the associated paper 'Autothermal reforming of acetic acid to hydrogen and syngas on Ni and Rh catalysts
Supplementary: Global continental and marine detrital εNd: an updated compilation for use in understanding marine Nd cycling
No full textUnderstanding the role of sediment-water interactions in the oceanic cycling of neodymium (Nd) isotopes is essential for its reliable use as a modern and palaeoceanographic tracer of ocean circulation. However, the exact processes that control Nd cycling in the ocean are poorly defined and require an up-to-date knowledge of the sources, sinks and transformation of this tracer to and within the ocean (e.g. as per the GEOTRACES core mission). We propose a considerable improvement of Nd-source identification by providing an extensive and up-to-date compilation of published terrestrial and marine sedimentary Nd isotopic measurements. From this database, we construct high resolution, gridded, global maps that characterise the Nd-isotopic signature of the continental margins and seafloor sediment. Here, we present the database, interpolation methods, and final data products. Consistent with the previous studies that inform our compilation, our global results show unradiogenic detrital Nd isotopic values (εNd ≈ -20) in the North Atlantic, εNd values of ≈ -12 to -7 in the Indian and Southern Ocean, and radiogenic values (εNd ≈ -3 to +4) in the Pacific. The new, high-resolution interpolation is useful for improving conceptual knowledge of Nd sources and sinks and enables the application of isotope-enabled ocean models to understand targeted Nd behaviour in the oceans. Such applications may include: examining the strength and distribution of a possible benthic flux required to reconcile global Nd budgets, establishing the potential use of Nd isotopes as a kinematic tracer of ocean circulation, and a general quantification of the non-conservative sedimentary processes that may contribute to marine Nd cycling
The Temple Newsam Picture Gallery Suite: under the microscope
No full textA collaboration between the Bioimaging Facility and the curators at Temple Newsam House (Rachel Conroy & Adam Toole) to use microscopy to analyse the wear and stitching patterns in the Picture Gallery Suite. These are the raw digital microscope images of the furniture, organised by each piece of furniture
Bridging Structure, Dynamics, and Thermodynamics: An Example Study on Aqueous Potassium Halides - dataset
No full textAqueous salt systems are ubiquitous in all areas of life. The ions in these solutions impose important structural and dynamic perturbations to water. In this study we employ a combined neutron scattering, nuclear magnetic resonance, and computational modelling approach to deconstruct ion specific perturbations to water structure and dynamics and shed light on the molecular origins of bulk thermodynamic properties of the solutions. Our approach uses the atomistic scale resolution offered to us by neutron scattering and computational modelling to investigate how the properties of particular short-ranged microenvironments within aqueous systems can be related to bulk properties of the system. We find that by considering only the water molecules in the first hydration shell of the ions that the enthalpy of hydration can be determined. We also quantify the range over which ions perturb water structure by calculating the average enthalpic interaction between a central halide anion and the surrounding water molecules as a function of distance and find that the favourable anion-water enthalpic interactions only extend to ~4 Å. We further validate this by showing that ions induce structure in their solvating water molecules by examining the distribution of dipole angles in first hydration shell of the ions, but that this perturbation does not extend into the bulk water. We then use these structural findings to justify mathematical models which allow us to examine perturbations to rotational and diffusive dynamics in the first hydration shell around the potassium halide ions from NMR measurements. This shows that as one moves down the halide series from F to I, and ionic charge density is therefore reduced, that the enthalpy of hydration becomes less negative. The first hydration shell also becomes less well structured, and rotational and diffusive motions of the hydrating water molecules are increased. This reduction in structure and increase in dynamics is likely the origin of the previously observed increased entropy of hydration as one moves down the halide series. These results also suggest that simple monovalent potassium halide ions induce mostly local perturbations to water structure and dynamics