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270 results for “near-infrared”
Data from: Heating rates are more strongly influenced by near-infrared than visible reflectance in beetles
Open the record for dataset details and reuse information.
Data from: Bio-inspired imager improves sensitivity in near-infrared fluorescence image-guided surgery
Open the record for dataset details and reuse information.
Data from: Climate is a strong predictor of near-infrared reflectance but a poor predictor of colour in butterflies
Colour variation across climatic gradients is a common ecogeographical pattern; yet there is long-standing contention over underlying causes, particularly selection for thermal benefits. We tested the evolutionary association between climate gradients and reflectance of near-infrared (NIR) wavelengths, which influence heat gain but are not visible to animals. We measured ultraviolet, visible and NIR reflectance from calibrated images of 372 butterfly specimens from 60 populations (49 species, 5 families) spanning the Australian continent. Consistent with selection for thermal benefits, the association between climate and reflectance was stronger (slope and effect size) for NIR than UVA-visible wavelengths. Furthermore, climate predicted reflectance of the thorax and basal wing, which are critical to thermoregulation; but did not predict reflectance of the entire wing, which has a variable role in thermoregulation depending on basking behaviour. These results provide evidence that selection for thermal benefits has shaped the reflectance properties of butterflies.
Near-infrared MINFLUX imaging enabled by suppression of fluorophore blinking
<p><strong>This upload contains raw data and simulation software underlying the results presented in a manuscript submitted for peer-review</strong><strong>, with the title:</strong></p> <p><strong> </strong></p> <p><strong>Near-infrared MINFLUX imaging enabled by suppression of fluorophore blinking</strong></p> <p> </p> <p><strong>Authored by:</strong></p> <p><strong>C Venugopal Srambickal<sup>1,*</sup>, H Esmaeeli<sup>1,*</sup>, J Piguet<sup>1</sup>, L Reinkensmeier<sup>2</sup>, R Siegmund<sup>2</sup>, A Agostinho<sup>3</sup> ,M Bates<sup>2</sup>, A Egner<sup>2</sup>, J Widengren<sup>1,**</sup></strong></p> <p><sup>1</sup> Experimental Biomolecular Physics, Bio-Opto-Nano Unit, Department of Applied Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden</p> <p><sup>2 </sup>Department of Optical Nanoscopy, Institute for Nanophotonics, D-37077 Göttingen, Germany</p> <p><sup>3</sup> Science for Life Laboratory, Department of Applied Physics, Royal Institute of Technology, SE-17165 Solna, Sweden</p> <p><sup>*</sup> Contributed equally</p> <p><sup>**</sup> Corresponding author: jwideng@kth.se</p> <p> </p> <p><strong>ABSTRACT</strong></p> <p>MINimal photon FLUXes (MINFLUX) offers super-resolution microscopy (SRM) with nanometer localization precision, with lower fluorophore brightness and photostability requirements than for other SRM techniques. Nonetheless, low localization probabilities have been reported in several MINFLUX studies, and a broader use of less bright and photostable fluorophores, including near-infrared (NIR) fluorophores has been difficult to realize. In this work, we identified fluorophore blinking as a main cause of erroneous (and dismissed) fluorophore localizations in MINFLUX imaging and devised strategies to overcome these effects. We systematically studied the blinking/switching properties of cyanine fluorophores emitting in the far-red or NIR range, over typical time scales (µs-10ms), sample and excitation conditions used in MINFLUX imaging. Subsequent simulations of representative MINFLUX localization procedures showed that trans-cis isomerization, and in particular photo-reduction of the fluorophores, can generate significant localization errors. These localization errors, however, could be suppressed by balanced redox buffers and repetitive excitation beam scans. Implementing these strategies, and replacing the slower, intrinsic switching of the fluorophores needed for the localization by transient binding of fluorophore-labelled DNA strands to complementary DNA strands attached to the targets (DNA-PAINT), we could for the first time demonstrate NIR-MINFLUX imaging with nanometer localization precision. This work presents an overall strategy, where fluorophore blinking characterization and subsequent simulations make it possible to design optimal sample and excitation conditions, opening for NIR-MINFLUX imaging, as well as for a broader use of fluorophores in MINFLUX and related SRM studies.</p> <p>Acknowledgements:</p> <p>This study was supported by the European Union's Horizon 2020 research and innovation program under grant agreement 101017180 (NanoVIB).</p> <p> </p> <p><strong>Files with raw data on which the manuscript is based are grouped into folders according to the figures/tables in the manuscript where the extracted results are presented. Additionally, software developed and used for the simulations are arranged into a separate folder. </strong></p> <p> </p>
DATA SET: Near-infrared diffuse optical characterization of human thyroid using ultrasound-guided hybrid time-domain and diffuse correlation spectroscopies
<p>This repository contains the data sets of the article:</p> <p>P. Fernández Esteberena et al. (2024). Near-infrared diffuse optical characterization of human thyroid using ultrasound-guided hybrid time-domain and diffuse correlation spectroscopies. <em>Biomedical Optics Express</em>. <a href="https://doi.org/10.1364/BOE.538141">https://doi.org/10.1364/BOE.538141</a></p>
Nanoprobes for Biomedical Imaging with Tunable Near-Infrared Optical Properties Obtained via Green Synthesis
<p>Dataset of: 10.1002/adpr.202100260</p>
In Vivo Near-Infrared Imaging Using Ternary Selenide Semiconductor Nanoparticles with an Uncommon Crystal Structure
<p>Dataset of </p> <table> <tbody> <tr> <td>https://zenodo.org/record/5793282#.YcCG4GjMJPY</td> </tr> </tbody> </table>
Competing Technologies: Determining the Geographical Origin of Strawberries (Fragaria × ananassa) using laboratory based Near-Infrared Spectroscopy compared to a simple portable device
<p><span>The application and development of fast and simple screening methods for the authentication of foods has increased continuously in recent years. A widely used analytical technique is Fourier transform near-infrared spectroscopy (FT-NIR). Despite the simple application of FT-NIR analysis, the analyses are usually carried out on benchtop devices in the laboratory. However small, inexpensive and mobile NIR devices could be used on-site. Despite the simple use of FT-NIR analysis, the examinations are usually carried out on a stationary benchtop device in a laboratory. However, in order to be able to perform the application directly on site, the application of small, cost-effective and mobile NIR devices for food analysis is crucial. In this study, both, a benchtop NIR instrument and a handheld NIR device with a lower resolution and analyzed wavenumber range were applied for the differentiation of strawberries from different geographical origins. Distinguishing German and non-German strawberries using linear discriminant analysis (LDA) yielded an accuracy of 91.9 % and 84.0 % using the benchtop and the handheld devices, respec-tively. Relevant variables could be assigned to lipids, carbohydrates and proteins. Overall, our study demonstrated for the first time that analyzing the geographical origin of strawberries using NIR spectroscopy is also possible by means of a handheld device.</span></p>
Visual, thermal, chemical, and stable isotope effects of near-infrared laser cutting on freezer ice
<p>This dataset includes visible-light and thermal imaging video of tap water ice being cut with millisecond-range pulses of 1070 nm laser light, as well as stable isotope and chemical (commonly-used ion species) composition data of ice samples frozen from Fiji bottled water and South Pole 1980 meltwater.</p> <p>This is a copy of the dataset published to USAP-DC, which requires that visitors arrange a download by email. The only changes are that the subdirectories have each been zipped—as Zenodo does not, at time of writing, support directories—and the .docx version of the README file has been omitted.</p>
Ultrahigh-responsivity waveguide-coupled optical power monitor for Si photonic circuits operating at near-infrared wavelengths
<p>The simulation code and script of Lumerical for the Simulation in the Supplementary figures: Fig. S4 and Fig. S5.</p>
Reproduction Package to "Resolving Power of Visible--to--Near-Infrared Hybrid beta-Ta/(Nb,Ti)N Kinetic Inductance Detectors"
<p>Reproduction package for paper: Resolving Power of Visible--to--Near-Infrared Hybrid beta-Ta/(Nb,Ti)N Kinetic Inductance Detectors. This package contains the necessary scripts and data to reproduce the data and figures in the paper. In addition, it contains a python based KID response model that can be used to test the coordinate transformations used in the paper for different use cases.</p>
Dataset for manuscript titled "Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared"
<p>The manuscript "Large active-area superconducting microwire detector array with single-photon sensitivity in the near-infrared" contains results for 1 mm<sup>2</sup> 8 pixel superconducting microwire single-photon detector arrays. All of the data used to generate the photon count rate vs. bias current and dark count rate vs. bias current plots are provided, along with measured properties of the films used to fabricate all devices. </p>
NEMO: A Database for Emotion Analysis Using Functional Near-infrared Spectroscopy
<p>The data from publication "NEMO: A Database for Emotion Analysis Using Functional Near-infrared Spectroscopy".<br> <br> <code>nemo-bids.zip</code> contains the raw optical density (OD) recordings and corresponding metadata for each participant.</p> <p><code><task_id>_csv.zip</code> provides an easy way to access the processed <a href="https://mne.tools/stable/auto_tutorials/epochs/10_epochs_overview.html">epochs</a> data without needing any code from the code repository or other BIDS tools.</p> <p><code>NEMO_additional_metadata.tsv</code> contains additional details, such as subject's age, monitor refresh rate, gender, handedness, recording date and time, specifics about different trial types, and more. Detailed descriptions of each column can be found in the <code>NEMO_additional_metadata_column_descriptions.tsv</code> file.</p> <p>For how to use the data, refer to <a href="https://github.com/Cognitive-Computing-Group/NEMO">https://github.com/Cognitive-Computing-Group/NEMO</a></p>
The Value of Lymph Node Dissection of Indocyanine Green-guided Near-infrared Fluorescent Imaging in Esophagectomy
ClinicalTrials.gov study NCT04615806. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Identifying Cerebral Hemodynamic Patterns in Mood Disorders and Mild Cognitive Impairment: A Functional Near-Infrared Spectroscopy (fNIRS) Study
ClinicalTrials.gov study NCT06897670. IPD Sharing: NO. Countries: 1. Publications: 7.
Objective Perfusion Rate Assessment by Near-infrared Fluorescence in Ileal Pouch Formation and Ileal-pouch-anal Anastomosis
ClinicalTrials.gov study NCT04695964. IPD Sharing: UNDECIDED. Countries: 1. Publications: 6.
Near-infrared Transcranial Laser Therapy in Subjects With Major Depressive Disorder: A Study of Dosing With Laser
ClinicalTrials.gov study NCT05435820. IPD Sharing: NO. Countries: 1. Publications: 3.
The Effect of Near-infrared Light Therapy on Brain Function and Cognition in Young and Older Adults
ClinicalTrials.gov study NCT07209683. IPD Sharing: NO. Countries: 1. Publications: 1.
Nephrogreen. Appearances of Exvivo Renal Tumours Under Near-infrared
ClinicalTrials.gov study NCT05735977. IPD Sharing: NO. Countries: 1. Publications: 13.
Assessment of Microcirculation Alteration With Both Sublingual Microcirculation and Near-infrared Spectroscopy on ARDS
ClinicalTrials.gov study NCT05180409. IPD Sharing: NO. Countries: 1. Publications: 55.
ScienceDex guides
Understand access before you commit
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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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.