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Dataset results
302 results for “microplastic”
Microplastics in Otitis Media With Effusion Material
ClinicalTrials.gov study NCT06316635. IPD Sharing: UNDECIDED. Countries: 1. Publications: 1.
Microplastics alter feeding strategies of a coral reef organism
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Data from: Microplastics negatively affect soil fauna but stimulate microbial activity: insights from a field-based microplastic addition experiment
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Spatial-temporal growth, distribution, and diffusion of marine microplastic research and national plastic policies
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Data from: Microplastic prevalence in 4 Oregon rivers along a rural to urban gradient applying a cost‐effective validation technique
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Data from: Flow cytometry combined with viSNE for analysis of microbial biofilms and detection of microplastics
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Data from: Microplastics disrupt hermit crab shell selection
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No short-term effect of sinking microplastics on heterotrophy or sediment clearing in the tropical coral Stylophora pistillata
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Microplastics in Eurasian otter (Lutra lutra) spraints and their potential as a biomonitoring tool in freshwater systems
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Atmospheric transport is a major pathway of microplastics to remote regions
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Data from: Seafloor microplastic hotspots controlled by deep-sea circulation
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Data from: Impacts of microplastic versus natural abiotic particles on the clearance rate of a marine mussel
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Numerical and mass concentrations of microplastic debris collected by manta net; Numerical concentrations of Halobates sericeus adults/juveniles and eggs; zooplankton biomass concentration. Various cruises from 1972 - 2010 (completed).
Microplastic, Halobates, and zooplankton were collected using a standard manta net tow. Each sample was sorted at 6-12x magnification under a Wild M-5 dissecting microscope, and plastic particles and H. sericeus removed for further analysis. Plastic particles were soaked in deionized water to remove salts, dried at 60°C, and stored in a desiccator. Dry mass was measured on an analytical balance. Particles were then digitally imaged with a Zooscan digital scanner (Gorsky et al. 2010). The total number of particles was measured using NIH ImageJ-based tools in the Zooprocess software, calibrated against manual measurements (Gilfillan et al. 2009, Gorsky et al. 2010). H. sericeus samples were enumerated and classified into 5 categories: juvenile, adult male, adult female, newly molted, and molted exoskeletons. H. sericeus eggs, both those attached to plastic and those that had become detached during the collection process, were also enumerated. Dry mass of zooplankton was obtained from preserved manta tow samples. After fixation in 1.8% formaldehyde for 24 months, samples were split in a Folsom splitter, filtered onto 202 µm Nitex mesh disks and rinsed with isotonic ammonium formate. Filters were dried for 24 hours at 60°C and placed in a vacuum dessicator until weighing. Filters were weighed to the nearest 0.0001 gram on the same analytical balance as the plastic samples. A 20% correction factor was applied in order to compensate for the biomass lost by preservation.
Numerical (No m-3) concentrations (mg m-3) of subsurface microplastic debris collected by bongo net aboard the Scripps Environmental Accumulation of Plastic Expedition (SEAPLEX) cruise, August 2009.
Microplastic was collected using a standard bongo net tow. Each sample was sorted at 6-12x magnification under a Wild M-5 dissecting microscope, and plastic particles and removed for further analysis. Plastic particles were soaked in deionized water to remove salts, dried at 60°C, and stored in a desiccator. Dry mass was measured on an analytical balance. Particles were then digitally imaged with a Zooscan digital scanner (Gorsky et al. 2010). The total number of particles was measured using NIH ImageJ-based tools in the Zooprocess software, calibrated against manual measurements (Gilfillan et al. 2009, Gorsky et al. 2010)
Feret diameter (mm), area (mm2), and circularity of microplastic debris collected by manta net aboard the Scripps Environmental Accumulation of Plastic Expedition (SEAPLEX) cruise, August 2009, and NOAA Okeanos Explorer expedition, 2010.
Microplastic was collected using a standard manta net tow. Each sample was sorted at 6-12x magnification under a Wild M-5 dissecting microscope, and plastic particles and H. sericeus removed for further analysis. Plastic particles were soaked in deionized water to remove salts, dried at 60°C, and stored in a desiccator. Particles were then digitally imaged with a Zooscan digital scanner (Gilfillan et al. 2009, Gorsky et al. 2010)
Microplastic measurements including, mass, color, particle type and plastic type collected aboard the Scripps Environmental Accumulation of Plastic Expedition (SEAPLEX) cruise, August 2009.
Microplastic was collected using a standard manta net tow. Each sample was sorted at 6-12x magnification under a Wild M-5 dissecting microscope, and plastic particles and H. sericeus removed for further analysis. Plastic particles were soaked in deionized water to remove salts, dried at 60°C, and stored in a desiccator. Particles were then digitally imaged with a Zooscan digital scanner (Gilfillan et al. 2009, Gorsky et al. 2010)
Microplastic changes the sinking and resuspension rates of marine mussel biodeposits
<p>Microplastic (MP; < 5mm) is ubiquitous in marine environments and is likely transported by biotic benthic-pelagic coupling. Mussels are key benthic-pelagic couplers, concentrating particles from the water column into dense and nutrient rich biodeposits. This study examined how MP affects benthic-pelagic coupling processes of mussels exposed to feeding regimes with and without MP by measuring four attributes of biodeposits: 1) morphology, 2) quantity of algal and MP particles, 3) sinking rate, and 4) resuspension velocity. We found interacting effects of particle treatment and biodeposit type on biodeposit morphology. Biodeposits from the algae treatment contained more algal cells on average than biodeposits from the MP treatment. Biodeposits from the MP treatment sank 34-37% slower and resuspended in 7-22% slower shear velocities than biodeposits from the algae treatment. Decreases in sinking and resuspension velocities of biodeposits containing MP may increase dispersal distances, thus decreasing in-bed nutrient input and increasing nutrient subsidies for other communities.</p>
EFFECTS OF MICROPLASTICS AND DROUGHT ON SOIL ECOSYSTEM FUNCTIONS AND MULTIFUNCTIONALITY
<p class="western"> </p> <ol> <li> <p><span><span>Microplastics in soils have become an important threat for terrestrial systems as they may potentially alter the geochemical/biophysical soil environment and can interact with drought. As microplastics may affect soil water content, this could exacerbate the well-known negative effects of drought on ecosystem functionality. Thus, functions including litter decomposition, soil aggregation or those related with nutrient cycling can be altered. Despite this potential interaction, we know relatively little about how microplastics, under different soil water conditions, affect ecosystem functions and multifunctionality. </span></span></p> </li> <li> <p><span><span>To address this gap, we performed an experiment using grassland plant communities growing in microcosms. Microplastic fibers (absent, present) and soil water conditions (well-watered, drought), were applied in a fully factorial design. At harvest, we measured soil ecosystem functions related to nutrient cycling (ß-glucosaminidase, ß-D-cellobiosidase, phosphatase, ß-glucosidase enzymes), respiration, nutrient retention, pH, litter decomposition and soil aggregation (water stable aggregates). As terrestrial systems provide these functions simultaneously, we also assessed ecosystem multifunctionality, an index that encompasses the array of ecosystem functions measured here.</span></span></p> </li> <li> <p><span><span>We found that the interaction between microplastic fibers and drought affected ecosystem functions and multifunctionality. Drought had negatively affected nutrient cycling by decreasing enzymatic activities by up to ~39 %, while microplastics increased soil aggregation by ~18 %, soil pH by ~4 %, and nutrient retention by up to ~70 % by diminishing nutrient leaching. Microplastic fibers also impacted soil enzymes, respiration and ecosystem multifunctionality, but importantly, the direction of these effects depended on soil water status. That is, under well-watered conditions, these functions decreased with microplastic fibers by up to ~34 % while under drought they had similar values irrespective of the microplastic presence, or tended to increase with microplastics. Litter decomposition had a contrary pattern increasing with microplastics by ~6 % under well-watered conditions while decreasing to a similar percentage under drought. </span></span></p> </li> <li> <p><span><span><i>Synthesis and applications</i>. Single ecosystem functions can be positively or negatively affected by microplastics fibers depending on soil water status. However, our results suggest that microplastic fibers may cause negative effects on ecosystem soil multifunctionality of a similar magnitude as drought. Thus, strategies to counteract this new global change factor are necessary</span></span></p> </li> </ol>
Data from: Do microplastic particles affect Daphnia magna at the morphological, life history and molecular level?
Microplastic particles are ubiquitous not only in marine but also in freshwater ecosystems. However, the impacts of microplastics, consisting of a large variety of synthetic polymers, on freshwater organisms remains poorly understood. We examined the effects of two polymer mixtures on the morphology, life history and on the molecular level of the waterflea Daphnia magna (three different clones). Microplastic particles of ~40 µm were supplied at a low concentration (1% of the food particles) leading to an average of ~30 particles in the digestive tract which reflects a high microplastic contamination but still resembles a natural situation. Neither increased mortality nor changes on the morphological (body length, width and tail spine length) or reproductive parameters were observed for adult Daphnia. The analyses of juvenile Daphnia revealed a variety of small and rather subtle responses of morphological traits (body length, width and tail spine length). For adult Daphnia, alterations in expression of genes related to stress responses (i.e. HSP60, HSP70 & GST) as well as of other genes involved in body function and body composition (i.e. SERCA) were observed already 48h after exposure. We anticipate that the adverse effects of microplastic might be influenced by many additional factors like size, shape, type and even age of the particles and that the rather weak effects, as detected in a laboratory, may lead to reduced fitness in a natural multi-stressor environment.
Dataset of the publication entitled 'Light-Powered Self-Adaptive Mesostructured Microrobots for Simultaneous Microplastics Trapping and Fragmentation via in situ Surface Morphing'
<p>dataset of the publication entitled 'Light-Powered Self-Adaptive Mesostructured Microrobots for Simultaneous Microplastics Trapping and Fragmentation via in situ Surface Morphing'</p>
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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
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