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    1401 research outputs found

    Dataset associated with 'Synchrotron FTIR Mapping of Mineralization in a Microfluidic Device'

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    Fourier transform infrared micro-spectroscopy provides an effective means of performing rapid, non-destructive, and label-free analysis of specimens according to their vibrational modes. However, as water absorbs very strongly in the infrared region, analysis of aqueous solutions in transmission mode can suffer from problems with signal saturation. We here describe the fabrication of a novel microfluidic device that overcomes this problem. Devices with channel depths of just 3 µm were constructed from calcium fluoride using photolithography and hot embossing bonding, where calcium fluoride was selected due to its transparency in the IR region. The utility of this device was then demonstrated by employing it to follow the precipitation pathways of calcium sulfate and calcium carbonate using synchrotron FTIR micro-spectroscopy. Importantly, due to the high brightness provided by synchrotron radiation, and the fact that the reacting ions (HCO3- , CO32- and SO42-) and the different mineral polymorphs all have finger print spectra in the measured IR range, this method can be used to acquire time-resolved, hyperspectral maps of the mineral particles formed within the sample cell, and then study the interaction and evolution of particles. The data provide new insight into the formation pathway of a population of crystals in confined volumes, and demonstrate that this in situ, real-time detection system provides a powerful tool for studying crystallization processes. And the useful dataset were deposited here

    Dataset associated with 'Infinite-period density-matrix model for terahertz-frequency quantum cascade lasers'

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    In this work we present a density matrix model which considers an infinite quantum cascade laser (QCL) and models transport via a nearest neighbor approximation. We will discuss derivation of output parameters of the model in detail and show the direct mathematical link to semi-classical rate equation approach. This model can be extended to an arbitrary number of states in the QCL period, without a priori specification of upper and lower lasing level. Application of the model to various QCL structures is possible, including bound-to-continuum structures which typically employ a large number of states per period. The model has been applied to a 2 THz bound-to-continuum QCL and a very good agreement with measured V-I characteristics is obtained along with qualitative agreement with measured L-I characteristics in terms of dynamic range. This archive contains the data associeted with the publication "Infinite-period density-matrix model for terahertz-frequency quantum cascade lasers" and refers to all data presented in 8 figures in the paper

    Dataset for 'The Effects of Geometric Uncertainties on Computational Modelling of Knee Biomechanics'

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    This dataset contains the finite element models developed in this study and the outputs of the finite element models presented in the paper

    Bovine vertebral material model calibration and validation data set.

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    Experimental data: Raw data from material testing machine, CT data. Computational data: experimental vs computational stiffness results, file containing model description and morphology results (DA,BV/TV, angle deviation)

    Dataset associated with 'Simulation of photo-excited adenine in water with a hierarchy of equations of motion approach'

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    Simulation data of two- and three-level models of adenine in solution with a hierarchy of equations of motion approach

    Strain-tuning of the Magnetocaloric Transition Temperature in Model FeRh Films dataset

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    Data and figures arising from study of the effects of epitaxial strain on FeRh thin film

    Crystal Morphology and Interfacial Stability of RS-Ibuprofen in Relation to Its Molecular and Synthonic Structure dataset

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    Raw data associated with the publication 'Crystal Morphology and Interfacial Stability of RS-Ibuprofen in Relation to Its Molecular and Synthonic Structure'

    Data associated with 'In vitro biomechanical and hydrodynamic characterisation of decellularised human pulmonary and aortic roots'

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    This study has performed full and robust assessment of biomechanical and hydrodynamic properties of decellularised cryopreserved human aortic and pulmonary roots. Findings from this study will serve as a step forward to use decellularised human heart valves for clinical trial

    Data associated with 'Green tea catechins and their metabolites in human skin before and after exposure to ultraviolet radiation'

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    Analytical data on green tea catechin metabolites in skin

    Characteristics of low concentration SDS decellularised human donor aortic and pulmonary valved conduits.

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    Data on the biological and biomechanical properties of human donor aortic and pulmonary cardiac valves before and after decellularisation: biomechanical testing data (ultimate tensile strength, failure strain, Young's modulus); DNA, collagen and GAG content; in vitro biocompatibility

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