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228 results for “light responsive”
Setaria viridis images used in the paper entitled "Led Color Gradient As A New Screening Tool For Rapid Phenotyping Of Plant Responses To Light Quality" by Pierre LEJEUNE et al.
<p><em>Setaria viridis</em> images used in the paper entitled "Led Color Gradient As A New Screening Tool For Rapid Phenotyping Of Plant Responses To Light Quality" by Pierre LEJEUNE, Anthony FRATAMICO, Frédéric BOUCHÉ, Samuel HUERGA-FERNÁNDEZ, Pierre TOCQUIN, Claire PÉRILLEUX</p>
Dual-Responsive Nanoparticles for Smart Drug Delivery: a NIR light Sensitive and Redox- Reactive PEG-PCL based System
<p>This folder contains raw data for the paper titled "Dual-Responsive Nanoparticles for Smart Drug Delivery: A NIR Light-Sensitive and Redox-Reactive PEG–PCL-Based System" authored by Nancy Ferrentino, Taha Behroozi Kohlan, Shokoufeh Mehrtashfar, Anna Finne-Wistrand, and Daniela Pappalardo, published in Biomacromolecules journal. <a title="DOI URL" href="https://doi.org/10.1021/acs.biomac.4c00889">https://doi.org/10.1021/acs.biomac.4c00889</a></p>
Temperature-dependent responses to light and nutrients in phytoplankton
<p>These files contain all data necessary to create the figures published in the study "Temperature-dependent responses to light and nutrients in phytoplankton"</p> <ul> <li>The uploaded files contain all T-scripts and tables used for the analyses of this study</li> <li>All data needed for the R-scripts are available in the folder '<em>RTables'</em></li> <li>A<em> READMe</em> file that descripes all data files is avalable in the ZIP file</li> </ul> <ol> <li>R-scripts "a-growthrates_RFU.R": Contains the calculation of the maximum linear growth rate using theRFU measurements (needed table is "incubation.txt")</li> <li>R-script: "b_gamlss_growthrates_RFU.R": We used a GAMLSS to search for a model that best described the observed growth rates and used a null model that predicts additive effect on growth (needed table is "growthrates_RFUbased.txt") - generates data for Figure 3 and Figure 3, and Table 2</li> <li>R-script "c_plots.R": Contains all R codes to generate all figures </li> <li>R-script "d_gamlss_growthrates_OD.R": Contains the same statistical analyses (GAMLSS) as used for the results of this study, but this time with the growth rates based on Optical Density data and RFU data (for appendix).</li> </ol>
Blue-light responses in Cancer borealis stomatogastric ganglion neurons
<p>Raw data used for paper "Blue-light responses in <em>Cancer borealis</em> stomatogastric ganglion neurons"</p> <p>File names are in the format: cell name_preparation number_condition identifier.</p> <p>Cell names are AB, PD, LP and PY.</p> <p>Conditions are intact, decentralized (dec) or PTX followed by the light intensity (baseline or actual intensity of light in microW/cm2)</p>
Photoperiod influences the shape and scaling of freshwater phytoplankton responses to light and temperature
Light fluctuations are ubiquitous, exist across multiple spatial and temporal scales, and directly affect the physiology and ecology of photoautotrophs. However, the indirect effects of light fluctuations on the sensitivity of organisms to other key environmental factors are unclear. Here, we evaluate how photoperiod regime (period of time each day where organisms receive light), a dynamic element of aquatic ecosystems, can influence the interactive effects of temperature and irradiance (intensity of light) on the growth rate of phytoplankton populations. We first completed a literature review and meta-analysis that suggests photoperiod alters the individual effects of temperature – but not irradiance – on algal growth rates and that highlights how few studies experimentally manipulate photoperiod, temperature, and irradiance. To address this empirical gap, we conducted a set of laboratory experiments on three freshwater phytoplankton species (Chlamydomonas reinhardtii, Chlorella vulgaris, and Cryptomonas ovata). We measured performance surfaces relating growth rate to irradiance and temperature gradients for each species in constant (24:0 hours of light:dark) environments. We then evaluated whether analogous surfaces measured under different photoperiods and scaled by the duration of light availability could be inferred from results under constant light. For a majority of the combinations of species and photoperiods examined, photoperiod meaningfully altered the intercept and shape of performance surfaces. These differences were most pronounced under the shortest photoperiod (6:18 light:dark), where populations underperformed expectations. Alterations to performance surfaces were non-linear and mostly structured by temperature with higher temperatures yielding higher than anticipated growth rates. Collectively, these experiments and synthesis reveal the potential for photoperiod regime to influence the effects of temperature, irradiance, and their interaction on phytoplankton growth. Beyond the environmental variables and organisms presently considered, this research highlights the capacity for dynamic, abiotic variables to exert direct effects while also influencing relationships among other environmental factors.
Light-Induced Spiking Response in Proteinoid-Actin-Kombucha System
<p>Data for the paper: 'Light-Induced Spiking Response in Proteinoid-Actin-Kombucha System'</p>
Light-responsive block copolymers with a spiropyran located at the block junction
<p>Data of manuscript "Light-responsive block copolymers with a spiropyran located at the block junction", published by the European Polymer Journal.</p>
Differential Gene Expression Dataset of Thalassiosira hyalina and Nitzschia frigida: Response to light stress under contemporary and elevated pCO2
<p>This is a time-course gene expression dataset on the transcriptomic responses of <em>Thalassiosira hyalina</em> and <em>Nitzschia frigida</em> to light stress under contemporary and elevated pCO2. The corresponding Sequencing data is deposited at the EBI ArrayExpress database under accession number E-MTAB-6999. Contigs were created with Trinity Assembler and are available under DOI:10.5281/zenodo.3361258</p> <p>The according publication is currently in review (8/6/2019): Higher sensitivity towards light stress and ocean acidification in an Arctic sympagic compared to a pelagic diatom;</p> <p>Author team: Ane C. Kvernvik, Sebastian D. Rokitta, Eva Leu, Lars Harms, Tove M. Gabrielsen, Björn Rost and Clara J. M. Hoppe</p> <p>Do not hesitate to contact the authors if you like more information!</p>
Evaluation of Spectral Light Simulation Tools For Prediction of ipRGC-influenced Light Responses in Field Conditions
<p><span>Spectral light simulation tools can be used to optimize lighting design in built environments for occupants’ ipRGC-influenced light (IIL) responses. The accuracy of these tools has been previously tested against measurements in controlled, neutral-colored spaces. This study aims to evaluate the accuracy of ALFA and Lark spectral light simulation tools in spectrally and geometrically complex environments. The methods consist of comparison of spectral irradiance, three IIL response metrics, and photopic illuminance in two office rooms in a university building. Measurements and simulations are performed in daylight, electric light, and combination of daylight and electric light. The dataset presented here documents this research.</span></p>
Data from: Adult plasticity in African Cichlids: rapid changes in opsin expression in response to environmental light differences
Phenotypic plasticity allows organisms to adapt quickly to local environmental conditions and could facilitate adaptive radiations. Cichlids have recently undergone an adaptive radiation in Lake Malawi where they inhabit diverse light environments and tune their visual sensitivity through differences in cone opsin expression. While cichlid opsin expression is known to be plastic over development, whether adults remain plastic is unknown. Adult plasticity in visual tuning could play a role in cichlid radiations by enabling survival in changing environments and facilitating invasion into novel environments. Here we examine the existence of and temporal changes in adult visual plasticity of two closely related species. In complementary experiments, wild adult Metriaclima mbenji from Lake Malawi were moved to the lab under UV-deficient fluorescent lighting; while lab raised M. benetos were placed under UV-rich lighting designed to mimic light conditions in the wild. Surprisingly, adult cichlids in both experiments showed significant changes in the expression of the UV-sensitive single cone opsin, SWS1, in only three days. Modeling quantum catches in the light environments revealed a possible link between the light available to the SWS1 visual pigment and SWS1 expression. We conclude that adult cichlids can undergo rapid and significant changes in opsin expression in response to environmental light shifts that are relevant to their habitat and evolutionary history in Lake Malawi. This could have contributed to the rapid divergence characteristic of these fantastic fishes.
Data from: Behavioural red-light sensitivity in fish according to the optomotor response
<p>Various procedures have been adopted to investigate spectral sensitivity of animals, e.g., absorption spectra of visual pigments, electroretinography, optokinetic response, optomotor response (OMR), and phototaxis. These works have led to various conclusions about animal vision. However, visual sensitivity should be evaluated consistently for a reliable comparison. In this study, we retrieved behavioural data of several fish species that used a unified procedure for the OMR test and compared the sensitivities to near-infrared light. Besides cavefish that lack eyes, some species were not appropriate for the OMR test because they either stayed still or changed swimming direction frequently. Eight fish species out of 13 species tested were OMR positive. Detailed analyses using goldfish, zebrafish, guppy, medaka, stickleback, and cichlid revealed that all the fish were sensitive to light at λ ≥ 750 nm, where the threshold wavelengths varied from 750 nm to 880 nm. Fish opsin repertoire enabled the perception of red light. In contrast, the copy number of long-wave-sensitive (LWS) genes did not necessarily improve red-light sensitivity. The duplication of LWS and other cone opsin genes that have occurred extensively during fish evolution might not aid increasing spectral sensitivity, but provide some other ophthalmic function, such as enhanced spectral discrimination.</p>
Data for: The photosynthetic response of spectral chlorophyll fluorescence differs across species and light environments in a boreal forest ecosystem
<p>Chlorophyll fluorescence can serve as a proxy of photosynthesis in boreal forests. When sustained non-photochemical quenching (NPQS) relaxes towards summer, leaf chlorophyll fluorescence (ChlF) emission increases along with photosynthesis. Yet, other physical and physiological factors can also leave a measurable imprint on the fluorescence emission spectra, and disrupt this relationship.</p> <p>We measured leaf-level spectral ChlF of Scots pine, Norway spruce and lingonberry exposed to contrasting light environments throughout the spring recovery of photosynthesis, simultaneously with a series of photosynthetic, biochemical and morphological traits. Correlations between traits and ChlF spectral components were analyzed to identify the mechanisms underlying both the spatial variation found between species and light environments, and the temporal variation found across the study period.</p> <p>Spatially, we found evidence of baseline differences in leaf-level ChlF magnitude, which we attribute to species- and light environment-specific changes in leaf morphology. Temporally, ChlF magnitude followed the relaxation of NPQS towards summer, but only in upper canopy foliage and lingonberry, suggesting a seasonal compensation effect between sustained photochemical quenching (PQS) and NPQS, potentially decoupling the seasonal relationship between ChlF and photosynthesis in shaded foliage. Finally, we show subtle changes in the shape of the ChlF spectra that took place independently of chlorophyll concentration dynamics, pointing to the complexity of NPQs which can involve structural rearrangements in the thylakoids and changes in the relative contribution of PSI to emitted ChlF.</p> <p>We conclude that the diversity of species and light environments found within an ecosystem generates a baseline level of variation in leaf spectral ChlF as well as contrasting seasonal photosynthetic acclimation patterns. These sources of variability should be taken into account when developing quantitative models for the interpretation of ChlF data, in particular for applications involving high resolution SIF imaging systems capable of resolving different plant individuals and their parts.</p>
Fig. 5 in On the Phototactic Response of RwandanDiaphanesMotschulsky (Coleoptera: Lampyridae) to a Trap with a 630Nm Red Light
Fig. 5. Peak wavelength emission of red light trap. Blue line refers to the red LED light on its own, and the black line refers to the red LED light when placed under the plastic cup. Notice that under the cup only the intensity changes, not the peak wavelength.
Activity measures for African Pygmy mice in response to dim and bright light
<p>Rodents are integral components of ecosystems as they provide several important ecosystem services. Despite their importance as prey, pollinators and seed distributors, African rodents are largely understudied. The effect of anthropogenic changes such as artificial light at night extend past urban areas to peri-urban and rural habitats and can have profound effects on entire ecosystems. We investigated the effect of dim light at night (dLAN) on the locomotor activity rhythms of the African pygmy mouse (<em>Mus minutoides</em>). Pygmy mice showed a dramatic, intensity dependent reduction in their locomotor activity when subjected to dLAN, which was accompanied by a delay in the activity onset. We also considered masking responses with a dark pulse during the day and a light pulse at night. All animals became inactive in response to a light pulse during the night, whereas approximately half of the animals showed activity during a dark pulse in the day. Our results suggest that the African pygmy mouse is highly sensitive to light and that their activity is strongly masked by light. In their natural environment, vegetation could shield pygmy mice against high light levels, however other anthropogenic disturbances can affect the behaviour of these animals and could affect their survival.</p>
Assessment of Hemodynamic Response During Intubation Between Rigid Laryngoscopy and Track Light in Coronary Patients
ClinicalTrials.gov study NCT01682707. IPD Sharing: Not stated. Countries: 1. Publications: 3.
The Effect of Induced Hyperammonaemia on Sleep and Melanopsin-mediated Pupillary Light Response in Patients With Liver Cirrhosis
ClinicalTrials.gov study NCT04771104. IPD Sharing: NO. Countries: 1. Publications: 1.
Multicenter RCT: LED Red Light Dose-Response in Myopia Progression Control
ClinicalTrials.gov study NCT07330180. IPD Sharing: NO. Countries: 1. Publications: 17.
The Flashing Light-Induced Pupil Response (FLIPR) Glaucoma Study
ClinicalTrials.gov study NCT01857440. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effects of Phototherapy by Low-level Light-emitting Diode Therapy (LEDT) on Clinical, Biochemical, Biomechanical, Histologic and Genetic Responses of Muscle Performance of Young Males Submitted to Phy
ClinicalTrials.gov study NCT01770938. IPD Sharing: Not stated. Countries: 1. Publications: 2.
A quantitative analysis of vertebrate environmental DNA degradation in soil in response to time, UV light and temperature
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Allen Brain Atlas
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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.