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26 results for “laser spectroscopy”
[Dataset] Simultaneous laser ultrasonic measurement of sound velocities and thickness of plates using combined mode local acoustic spectroscopy
<p>Research data for the purpose of reproducing the results presented in the journal publication titled "Simultaneous laser ultrasonic measurement of sound velocities and thickness of plates using combined mode local acoustic spectroscopy"</p>
Data for: Raman microspectroscopy and laser-induced breakdown spectroscopy for the analysis of polyethylene microplastics in human soft tissues
<p>Data from Raman microspectrometry, LIBS, XRF, and particle sizer analysis supports the findings in the published article named Raman microspectroscopy and laser-induced breakdown spectroscopy to analyze polyethylene microplastics in human soft tissues. The aim of this research is to present the optimized protocol for the detection and analysis of microplastics in biological samples.</p> <p><strong> </strong></p> <p>The tonsil tissue is used for this experiment, and the workflow consists of a few steps: 1. digestion, 2. filtration, 3. analysis. </p> <p>The presented dataset includes the data for verifying the validity of this proposed protocol and the data from clinical experiments done on tonsils where the protocol is applied. We are focusing only on PE microplastics as they are one of the most frequent plastic types in the environment. </p> <p>Firstly, the data from the particle sizer show the size distribution before and after KOH treatment, which is necessary for digestion. We are testing if the particles are not affected by the KOH solution. The data are listed in an Excel sheet where the individual detected PE particle size [µm] and their frequencies [%] are annotated. The data are separated into 2 tables in one sheet - 1st represents data collected before KOH and the 2nd after KOH treatment. </p> <p>To test the limits of our selected systems for microplastic detection, we included the data from Raman and LIBS under the file ‘limitations.’ The different sizes of PE particles, from tens to 1 µm, were analyzed, and the spectra can be retrieved in the folders. The signal intensity can be observed to see the detection limits. For the Raman analysis, the particles were located on the filter. For LIBS, the particles were embedded in epoxy to enable the detection of PE particles in tens of microns. The Raman data are in .txt files and can be opened in any adequate software (Matlab, R, Python, etc.). LIBS data are in specific .libsdata format, which can be opened by LibsAnalyzer software by Lightigo. </p> <p><strong> </strong></p> <p>The clinical experiment was done on tonsil tissue. The tissue was disgusted and filtered. Then, the filters were analyzed. The dataset presents two sample groups: 1. control-native tissue and 2. test-spiked tissue with PE particles. The data from Raman analysis include both, with the aim to confirm the presence of PE particles in the test sample and to exclude the contamination in the control sample. The spectra are again in .txt files. In the case of control, spectra from unclassified particles are presented. For these reasons, the LIBS and XRF were run to exclude the possibility of the presence of polymeric material on the filter of the control sample. The analyzed chemical elements by LIBS for both samples are in the ASC file. Furthermore, individual PE particles were also analyzed on LIBS to obtain reference results for test samples with added PE microplastics. In the case of XRF, data from the empty filter, control, and test samples are included, each in a .txt file. Individual detected chemical elements and their intensities can be retrieved in the tables. </p> <p> </p>
Analysis of heritage stones and model wall paintings by pulsed laser excitation of Raman, laser-induced fluorescence and laser-induced breakdown spectroscopy signals with a hybrid system
<p>Analysis of heritage stone samples, alabaster, gypsum, limestone and marble, and model wall paintings was carried out with a laboratory, hybrid system based on the pulsed laser excitation of Raman, laser-induced fluorescence and laser-induced breakdown spectroscopy signals. The system is based on a nanosecond Q-switched Nd:YAG laser operating at its second (532 nm), third (355 nm) and fourth (266 nm) harmonics and a spectrograph coupled to a time-gated intensified charge coupled device for spectral analysis allowing detection with temporal resolution. For the stone samples, Raman spectra display the characteristic vibration modes of SO<sub>4</sub><sup>2-</sup> of calcium sulfate, in alabaster and gypsum, and of free CO<sub>3</sub><sup>2- </sup>of calcium carbonate, in limestone and marble. Simultaneously acquired laser-induced fluorescence spectra reveal characteristic bands that help to distinguish between heritage stone types. The elemental composition of stone samples is obtained by laser-induced breakdown spectroscopy upon excitation at 355 nm. Spectra of all stone samples reveal their elemental composition that includes Ca, Na, Mn and Sr and the presence of molecular species, such as CN, C<sub>2</sub> and CaO. Additional emission lines, ascribed to Mg, Si, Al and K, appear with different intensities according to the nature of the stone material. Model wall paintings, based on a red pigment, prepared as fresco or mixed with two different binders, were also studied. The complementary information provided by the three spectroscopic modes allows the identification of the pigment as red vermillion and of the different preparations based on the pigment alone or in mixtures with linseed oil and egg yolk binders.</p>
Dataset: Laser spectroscopy of fermium isotopes probing trends in nuclear charge radii
<p>In this dataset, a collection of data supporting the findings in the publication J. Warbinek et al. (2024) is presented along with python scripts for the analysis of the data. In the README.txt file, mor einformation on the analysis scripts are provided. </p> <p> </p> <p>The data was collected as parts of on-line expeirmental campaigns between 2019 and 2022 at GSI Helmholtzzentrum für Schwerionenforschung GmbH. The experiments used the RADRIS laser spectroscopy setup coupled to the SHIP separator.</p> <p>More data was collected at Johannes Gutenberg-Universität Mainz between 2019 and 2023 using the RISIKO mass separator. </p> <p> </p> <p> </p>
Collinear laser spectroscopy data of singly charged natural uranium isotopes
<div> <div>This dataset contain the raw data produced in an offline experiment at the IGISOL facility, University of Jyväskylä</div> <div>Accelerator laboratory JYFL, using the Collinear Laser Spectroscopy (CLS) line to measure a set of ten ionic transitions in 234,235,238U.</div> </div>
Dataset: vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions
<p>This is a data set accompanying the publication "Vacuum-ultraviolet laser source for spectroscopy of trapped thorium ions" in the New Journal of Physics. https://doi.org/10.1088/1367-2630/aced1b</p>
Dataset for: Laser absorption spectroscopy measurements of different pulmonary oxygen gas concentrations in transmittance and remittance geometry – phantom study
<p><strong>Significance</strong></p> <p>GASMAS technique has the potential for continuous, clinical monitoring of pre-term infant lung function, removing the need to X-ray diagnosis and reliance on indirect and relatively slow measurement of blood oxygenation.</p> <p><strong>Aim</strong></p> <p>To determine optimal source-detector configuration for reliable path lengths calculation and to estimate the oxygen gas concentration inside the lung cavities filled with humidified gas with four different oxygen gas concentrations ranging between 21% and 100%.</p> <p><strong>Approach</strong></p> <p>Anthropomorphic optical phantoms of neonatal thorax with two different geometries were used to acquire Gas in Scattering Media Absorption Spectroscopy (GASMAS) signals, for 30 source-detector configurations in transmittance and remittance geometry of phantoms in two sizes.</p> <p><strong>Results</strong></p> <p>The results show that an internal light administration is more likely to provide a high GASMAS signal-to-noise ratio (SNR). In general, better SNRs were obtained with the smaller set of phantoms. The values of path length and O<sub>2</sub> concentrations calculated with signals from the phantoms with optical properties at 820 nm, exhibit higher variations than signals from the phantoms with optical properties at 764 nm.</p> <p><strong>Conclusion</strong></p> <p>The study shows that by moving the source and detector over the thorax, most of the lung volumes can potentially be assessed using GASMAS technique.</p>
External cavity quantum cascade laser vibrational circular dichroism spectroscopy for fast and sensitive analysis of proteins at low concentrations (Data analysis)
<p>This record contains a docker container image of the data evaluation shown in the publication "External cavity quantum cascade laser vibrational circular dichroism spectroscopy for fast and sensitive analysis of proteins at low concentrations". The evaluations can be accessed by running the container and accessing the contained Jupyter Lab via a browser. The calculations are contained in 'Eval_protein_D2O.ipynb'.</p> <p>To run the container (requires docker):</p> <p>1.download 'd2o_vcd.tar'</p> <p>2. in the command line, execute 'docker load -i d2o_vcd.tar'. This will return something like 'Loaded image: <image_name>' with image_name probably being "drhermann/vcd_d2o_00:trial_03"</p> <p>3. then 'docker run -p 8889:8889 <image_name>' replacing the brackets with the actual name of the image, such as drhermann/vcd_d2o_00:trial_03</p> <p>4.In your command line a link starting in 'http://127.0.0.1:8888/lab?token=...' will appear. Open this link in your browser to access the evaluation.</p>
Raw data for 'Increasing the Modulation Depth of Gd(III)-based Pulsed Dipolar EPR Spectroscopy (PDS) with Porphyrin-GdIII Laser Induced Magnetic Dipole Spectroscopy'
<p>Raw data for 'Increasing the Modulation Depth of Gd(III)-based Pulsed Dipolar EPR Spectroscopy (PDS) with Porphyrin-GdIII Laser Induced Magnetic Dipole Spectroscopy'</p>
Backscatter tuned laser absorption spectroscopy in additive manufacturing
<p>Raw data accompanying our paper </p> <p><strong>Backscatter absorption spectroscopy for process monitoring in powder bed fusion</strong></p> <p> </p>
Single-shot multi-keV X-ray absorption spectroscopy using an ultrashort laser wakefield accelerator source
<p>The data contained in this repository was used to generate the figures for the publication "Single-shot multi-keV X-ray absorption spectroscopy using an ultrashort laser wakefield accelerator source".</p>
Appendix Data for Manuscript : Application of OSL surface exposure dating with the use of two-dimensional OSL laser scanning instruments and energy-dispersive x-ray spectroscopy
<p>Appendix Data for Manuscript 'Application of OSL surface exposure dating with the use of two-dimensional OSL laser scanning instruments and energy-dispersive x-ray spectroscopy'.</p>
High-resolution and gapless dual comb spectroscopy with current-tuned quantum cascade lasers
<p>Data for figures 2-7 in</p> <p>M. Gianella et al., <em>High-resolution and gapless dual comb spectroscopy with current-tuned quantum cascade lasers, </em>Optics Express <strong>28</strong>, 6197-6208 (2020)</p> <p><a href="https://doi.org/10.1364/OE.379790">https://doi.org/10.1364/OE.379790</a></p> <p>Funding: Swiss National Science Foundation / InnoSuisse Grant 40B2-0_176584</p>
Nonresonant Raman spectroscopy of isolated human retina samples complying with laser safety regulations for in vivo measurements
<p>Raman raw data for the paper "Nonresonant Raman spectroscopy of isolated human retina samples complying with laser safety regulations for in vivo measurements"</p> <ul> <li>two sets of unprocessed Raman spectra recorded under restricted conditions as seen in Figure 5(b)</li> <li>each spectrum was recorded at 785 nm with 1 mW laser power and 10 s integration time</li> </ul>
Raw Data for "Frequency stabilisation and SI tracing of mid-infrared quantum-cascade lasers for precision molecular spectroscopy"
<p>The MasterRunner.m Matlab file in the main folder can execute individual Matlab scripts in different folders in order to analyze the data and generate the figures in the papers.</p> <p>The folder BeatNotes contains the raw data and the corresponding analysis scripts for getting the beats of the 729 laser, QCL, and the US laser. </p> <p>The folder AllanDeviation contains the Allan deviation measurements of the QCL and the 729 nm laser with respect to the GPS disciplined oscillator and the US laser. The file Analysis_v2.m can be executed in order to analyze the Allan deviation data.</p> <p>The folder TrackingOscillatorSetup contains the electronic schematic, list of components and a photo of the complete home-built VCO setup.</p>
Urocanic acid as a novel scaffold for next-gen nature-inspired sunscreens: I. Electronic laser spectroscopy under isolated conditions - dataset
Open the record for dataset details and reuse information.
Analysis of heritage stones and model wall paintings by pulsed laser excitation of Raman, laser-induced fluorescence and laser-induced breakdown spectroscopy signals with a hybrid system
<p>Laser based analysis of artworks benefits from the development of hybrid instruments where a single laser source serves to excite fluorescence, Raman and laser induced breakdown spectroscopy (LIBS) signals. Laser induced fluorescence (LIF) and Raman spectra provide information at the molecular level, while LIBS serves for identifying the elemental composition of the substrate under consideration. Studies using several excitation wavelengths on different types of materials and substrates help to develop and establish these hybrid systems for the conservation of artworks.</p>
Supplementary Data for Manuscript : "Application of OSL surface exposure dating with the use of two-dimensional OSL laser scanning instruments and energy-dispersive x-ray spectroscopy'
<p>Contains all supplementary works mentioned in the manuscript.</p>
Extended X-ray absorption spectroscopy using an ultrashort pulse laboratory-scale laser-plasma accelerator
<p>The data contained in this repository was used in the production of the publication "Extended X-ray absorption spectroscopy using an ultrashort pulse laboratory-scale laser-plasma accelerator"</p>
Supplementary Documents for Manuscript 'Investigating the use of two-dimensional OSL laser scanning instruments and energy-dispersive x-ray spectroscopy for OSL exposure dating'
<p>Appendix Data for Manuscript 'Investigating the use of two-dimensional OSL laser scanning instruments and energy-dispersive x-ray spectroscopy for OSL exposure dating' - with added "Readme's" for relevant databases.</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.