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2,281 results for “laboratories”
Laboratory experiments on river alternate bars
<p>Experiments performed in a 24 m-long flume with fixed straight and fixed banks but erodible bed, showing the spontaneous formation of downstream-migrating alternate bars.</p> <p>The dataset provides measured properties of alternate bars at equilibrium depending on flow discharge.</p> <p>Experiments funded by the project: GLORI - Glaciers-to-rivers sediment transfer in Alpine basins (Autonomous Province of Bozen-Bolzano).</p> <p>For further information see "metadata.txt".</p>
Data S1. Laboratory behavioral data from: Measuring the fitness advantage conferred by autotomy in the wild
<p>Data S1. Laboratory behavioral data. The composition is summarized in figure S1.</p> <p>Autotomy, the self-amputation of body parts, serves as an anti-predator defense in many taxonomic groups of animals. However, its adaptive value has seldom been quantified. Here, we propose a novel modeling approach for measuring the fitness advantage conferred by the capability for autotomy in the wild. Using a predator-prey system where a land snail autotomizes and regenerates its foot specifically in response to snake bites, we conducted a laboratory behavioral experiment and a 3-year multi-event capture–mark–recapture (CMR) study. Combining these empirical data, we developed a hierarchical model and estimated the basic life history parameters of the snail. Using samples from the posterior distribution, we constructed the snail's life table as well as that of a snail variant incapable of foot autotomy. As a result of our analyses, we estimated the monthly encounter rate with snake predators at 3.3% (95% CI: 1.6–4.9%), the contribution of snake predation to total mortality until maturity at 43.3% (15.0–95.3%), and the fitness advantage conferred by foot autotomy at 6.5% (2.7–11.5%). This study demonstrated the utility of the multi-method hierarchical modeling approach for the quantitative understanding of the ecological and evolutionary processes of anti-predator defenses in the wild.</p>
Raw data and supplementary material of the fifth inter-laboratory testing program (RRT5, self-healing concrete with macrocapsules) of the EU COST action SARCOS
<p>This data is the result of a collaboration of scientists working on the development of self-healing concrete within the framework of the European Cooperation in Science and Technology (COST) Action “Self-healing as preventive repair of concrete structures” SARCOS CA15202.</p> <p>In the framework of SARCOS 6 inter-laboratory testing programs are being executed to investigate possible standard test methods for self-healing concrete, each of the testing programs focusing on a different self-healing technique:<br> (1) Concrete with mineral additions,<br> (2) Concrete with the addition of magnesium oxide,<br> (3) Concrete enhanced with crystalline admixtures,<br> (4) High performance fibre reinforced concrete enhanced with crystalline admixtures,<br> (5) Concrete with preplaced macrocapsules containing polymeric healing agent, and<br> (6) Concrete with encapsulated bacteria.</p> <p>The data which can be found here have been obtained in the inter-laboratory testing program 5 "Concrete with preplaced macrocapsules containing polymeric healing agent". In total 6 labs participated in this testing program: Ghent University, Politecnico di Torino, Riga Technical University, Cracow University of Technology, Cambridge University, and KU Leuven (Ghent Technology Campus). All specimens were cast at Ghent University and were then distributed to the different labs, where they were tested.</p> <p>The testing program consisted of tests on both concrete and mortar specimens. The reinforced concrete specimens were cracked in a displacement-controlled three-point bending setup. Subsequently, they were subjected to two capillary water absorption tests, each with a different waterproofing technique. The mortar specimens were not reinforced, instead they were provided with a Carbon Fibre Reinforced Polymer (CFRP) laminate at the top. They were cracked in a force-controlled three-point bending setup, and immediately an active crack width control technique was applied to restrain the crack width of the specimens to a desired crack width range. After measuring of the crack width, the water permeability of the mortar specimens was accessed in a water flow test. In the end, the specimens were cracked open to assess the spread of the polyurethane healing agent.</p>
Chernobyl-level radiation exposure damages bumblebee reproduction: a laboratory experiment
The consequences for wildlife of living in radiologically contaminated environments are uncertain. Previous laboratory studies suggest insects are relatively radiation-resistant; however, some field studies from the Chernobyl Exclusion Zone report severe adverse effects at substantially lower radiation dose rates than expected. Here we present the first laboratory investigation to study how environmentally-relevant radiation exposure affects bumblebee life-history, assessing the shape of the relationship between radiation exposure and fitness-loss. Dose rates comparable to the Chernobyl Exclusion Zone (50-400 µGy h-1) impaired bumblebee reproduction and delayed colony growth but did not affect colony weight or longevity. Our best-fitting model for the effect of radiation dose rate on colony queen production had a strongly non-linear concave relationship: exposure to only 100 µGy h-1 impaired reproduction by 30-45%, while further dose rate increases caused more modest additional reproductive impairment. Our data indicate that the practice of estimating effects of environmentally-relevant low dose rate exposure by extrapolating from high dose rates may have considerably underestimated the effects of radiation. If our data can be generalised, they suggest insects suffer significant negative consequences at dose rates previously thought safe; we therefore advocate relevant revisions to the international framework for radiological protection of the environment.
The laboratory data of the measurements carried out on an n-decane saturated limestone sample
<p>This supporting information provides the numerical results of the laboratory experiments conducted on an n-decane saturated limestone sample with varying dead fluid volume, which correspond to the data presented in manuscript "The Effect of Boundary Conditions on the Elastic Moduli Measurements at Low Frequencies" submitted to Journal of Geophysical Research: Solid Earth.</p>
Dormancy in laboratory-reared Asian longhorned beetles, Anoplophora glabripennis
<p>An insect's capacity to survive winter is critical for range expansion in temperate regions. The Asian longhorned beetle (<em>Anoplophora glabripennis</em>) is a polyphagous wood-boring insect native to China and the Korean peninsula and poses a high risk of invasion in North America and Europe. It is unclear whether <em>A. glabripennis</em> enters diapause, which means that diapause cannot be included in assessments of the risk of this species invading forests in temperate regions. Using a laboratory colony, we examine larval developmental arrest, metabolic rates, gas exchange patterns, thermal sensitivity, and body composition to characterize larval dormancy. Chilled larvae entered a temperature-independent developmental arrest which usually required more than four weeks of chilling to break, decreased their metabolic rate by as much as 63 %, and maintained energy stores throughout the chilling period – results consistent with an obligate diapause. We also observed a switch to discontinuous gas exchange at low temperatures. Thermal sensitivity of metabolic rate did not differ between chilled and non-chilled larvae. Taken together, we conclude that <em>A. glabripennis</em> enters a larval diapause during chilling and terminates diapause after a requisite chilling period. These results will enhance our ability to predict phenology and potential distribution of current and future invasions of <em>A. glabripennis</em>. An insect's capacity to survive winter is critical for range expansion in temperate regions. The Asian longhorned beetle (<em>Anoplophora glabripennis</em>) is a polyphagous wood-boring insect native to China and the Korean peninsula and poses a high risk of invasion in North America and Europe. It is unclear whether <em>A. glabripennis</em> enters diapause, which means that diapause cannot be included in assessments of the risk of this species invading forests in temperate regions. Using a laboratory colony, we examine larval developmental arrest, metabolic rates, gas exchange patterns, thermal sensitivity, and body composition to characterize larval dormancy. Chilled larvae entered a temperature-independent developmental arrest which usually required more than four weeks of chilling to break, decreased their metabolic rate by as much as 63 %, and maintained energy stores throughout the chilling period – results consistent with an obligate diapause. We also observed a switch to discontinuous gas exchange at low temperatures. Thermal sensitivity of metabolic rate did not differ between chilled and non-chilled larvae. Taken together, we conclude that <em>A. glabripennis</em> enters a larval diapause during chilling and terminates diapause after a requisite chilling period. These results will enhance our ability to predict phenology and potential distribution of current and future invasions of <em>A. glabripennis</em>.</p>
A Laboratory Forced-Oscillation Apparatus
<p>In this file, we present supplementary materials for the paper titled </p> <p><em><strong>"A Laboratory Forced-Oscillation Apparatus for Measurements of Elastic and Anelastic Properties of Rocks at Seismic Frequencies" </strong></em></p> <p>by <strong>Vassily Mikhaltsevitch, Maxim Lebedev, Rafael Chavez, </strong><strong>Euripedes</strong> <strong>A. </strong><strong>Vargas Jr. and </strong><strong>Guilherme F. </strong><strong>Vasquez</strong></p>
The cultural transmission of causally (ir)relevant actions in the laboratory: Does modelling or verbal instruction lead to greater copying fidelity?
<p>This study examines the fidelity with which adults vs. children transmit a set of actions within diffusion chains (generations 1 to 3). The set consisted of causally relevant and causally irrelevant actions. Half of the adult and half of the child chains transmitted the actions via demonstration (next participant saw the previous perform the actions on video); the other half transmitted them verbally (next participant listened to audio file the previous participant describe his/her actions). We measured whether the actions were retained (i.e. re-produced by each next participant in the chain).</p>
An Introduction to a Bayesian Analysis of the Laboratory Origin of SARS-CoV-2
<p>An Introduction to a Bayesian Analysis of the Laboratory Origin of SARS-CoV-2</p>
Data from: Endosymbiont diversity in natural populations of Tetranychus mites is rapidly lost under laboratory conditions
<p>Although the diversity of bacterial endosymbionts in arthropods is well documented, whether and how such diversity is maintained remains an open question. We investigated the temporal changes occurring in the prevalence and composition of endosymbionts after transferring natural populations of <i>Tetranychus </i>spider-mites from the field to the laboratory. These populations, belonging to three different <i>Tetranychus </i>species (<i>T. urticae</i>, <i>T. ludeni </i>and <i>T. evansi</i>) carried variable infection frequencies of <i>Wolbachia</i>, <i>Cardinium</i>, and <i>Rickettsia</i>. We report a rapid change of the infection status of these populations after only 6 months of laboratory rearing, with an apparent loss of <i>Rickettsia </i>and <i>Cardinium</i>, while <i>Wolbachia </i>apparently either reached fixation or was lost. We show that <i>Wolbachia </i>had variable effects on host longevity and fecundity, and induced variable levels of cytoplasmic incompatibility (CI) in each fully infected population, despite no sequence divergence in the markers used and full CI rescue between all populations. This suggests that such effects are largely dependent upon the host genotype. Subsequently, we used these data to parameterize a theoretical model for the invasion of CI-inducing symbionts in haplodiploids, which shows that symbiont effects are sufficient to explain their dynamics in the laboratory. This further suggests that symbiont diversity and prevalence in the field are likely maintained by environmental heterogeneity, which is reduced in the laboratory. Overall, this study highlights the lability of endosymbiont infections and draws attention to the limitations of laboratory studies to understand host-symbiont interactions in natural populations.</p>
Conservation Laboratory Concept Design
University of Namibia Conservation Training Laboratory - PHASE 1: Planning and conceptualizing the preliminary layout and associated components / ergonomics of the proposed conservation laboratory, also taking into account the objectives / role of the training space with respect to the module: Scientific Principles of Conservation (Postgraduate Diploma - Heritage Conservation and Management). This concept proposal embodies a number of assumptions, namely that: 1. normal budgetary constraints are applicable, and to a conventional degree. 2. certain interior walls may be functional and/or load-bearing. 3. the staircase shall remain functional and in use. 4. rotational use may compensate for peak demand, when in excess of ergonomic capacity. 5. plumbed utilities may be consigned to the South Western facade only and should be excluded from the North Western facade. Source: Objaverse 1.0 / Sketchfab
Ct Laboratory Sentinel Testers 2008-2014
<p>Dataset comprises tests sampled in the German Chlamydia trachomatis laboratory sentinel during 2008 and 2014.</p>
LabbookDB Presentation - A Relational Framework for Laboratory Metadata
<p>LabbookDB is a relational database application framework for life sciences—providing an extendable schema and functions to conveniently add and retrieve information, and generate summaries. The core concept of LabbookDB is that wet work metadata commonly tracked in lab books or spreadsheets is more efficiently and more reliably stored in a relational database, and more flexibly queried. We overcome the flexibility limitations of designed-for-analysis spreadsheets and databases by building our schema around atomized physical object interactions in the laboratory (and providing plotting- and/or analysis-ready dataframes as a compatibility layer). We keep our database schema more easily extendable and adaptable by using joined table inheritance to manage polymorphic objects and their relationships. LabbookDB thus provides a wet work metadata storage model excellently suited for exploratory ex-post reporting and analysis, as well as a potential infrastructure for automated wet work tracking.</p>
Anonymized Transcripts of Change Laboratory Workshops
<p>Full transcript in Italian of the Change laboratory workshops in a a secondary vocational secondary institute in the Lombardy region.</p> <p>The workshops involved an overall number of 37 participants throughout the meetings between humanity teachers, science teachers, technical teachers and workshop assistants. </p> <p>Transcripts of 7 workshops (in 2016), 2 follow-up and two department councils (in 2016 and 2017). </p> <p>The transcripts have been fully anonymized.</p> <p> </p>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Romania
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_RO - National Sanitary Veterinary and Food Safety Authority (ANSVSA)</li> <li>ASF2023_RO - National Sanitary Veterinary and Food Safety Authority (ANSVSA)</li> <li>ASF2022_RO - National Sanitary Veterinary and Food Safety Authority (ANSVSA)*</li> <li>ASF2022_RO - National Sanitary Veterinary and Food Safety Authority (ANSVSA)</li> </ul> <p> </p> <p> </p> <p>*This version of the ASF laboratory data has been republished with the subunit identification code (sampUnitIds.subUnitId) column empty due to data protection reasons</p>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Lithuania
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_LT - National Food and Veterinary Risk Assessment Institute (NMVRVI)</li> <li>ASF2023_LT - National Food and Veterinary Risk Assessment Institute (NMVRVI)</li> <li>ASF2022_LT - National Food and Veterinary Risk Assessment Institute (NMVRVI)*</li> <li>ASF2022_LT - National Food and Veterinary Risk Assessment Institute (NMVRVI)</li> </ul> <p> </p> <p> </p> <p>*This version of the ASF laboratory data has been republished with the subunit identification code (sampUnitIds.subUnitId) column empty due to data protection reasons</p>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Greece
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_GR - Hellenic Ministry of Rural Development and Food (MINAGRIC)</li> <li>ASF2023_GR - Hellenic Ministry of Rural Development and Food (MINAGRIC)</li> </ul>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Czechia
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_CZ - State Veterinary Administration (SVA)</li> <li>ASF2023_CZ - State Veterinary Administration (SVA)</li> <li>ASF2022_CZ - State Veterinary Administration (SVA)*</li> <li>ASF2022_CZ - State Veterinary Administration (SVA)</li> </ul> <p> </p> <p> </p> <p>*This version of the ASF laboratory data has been republished with the subunit identification code (sampUnitIds.subUnitId) column empty due to data protection reasons</p>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Slovakia
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_SK - State Veterinary and Food Institute (SVPU)</li> <li>ASF2023_SK - State Veterinary and Food Institute (SVPU)</li> <li>ASF2022_SK - State Veterinary and Food Institute (SVPU)*</li> <li>ASF2022_SK - State Veterinary and Food Institute (SVPU)</li> </ul> <p> </p> <p> </p> <p> </p> <p>*This version of the ASF laboratory data has been republished with the subunit identification code (sampUnitIds.subUnitId) column empty due to data protection reasons</p>
Laboratory data complementing the annual report on the epidemiological analyses of African swine fever (ASF) in the European Union - Estonia
<p>This dataset contains ASF laboratory analytical results in domestic pigs and wild boar.</p> <p><strong>Reporting authorities contributing to the data collection:</strong></p> <ul> <li>ASF2024_EE - Estonian Veterinary and Food Laboratory (VFL)</li> <li>ASF2023_EE - Estonian Veterinary and Food Laboratory (VFL)</li> <li>ASF2022_EE - Estonian Veterinary and Food Laboratory (VFL)*</li> <li>ASF2022_EE - Estonian Veterinary and Food Laboratory (VFL)</li> </ul> <p> </p> <p> </p> <p>*This version of the ASF laboratory data has been republished with the subunit identification code (sampUnitIds.subUnitId) column empty due to data protection reasons</p>
ScienceDex guides
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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)
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.