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600 results for “Contamination”
Influence of a portable air cleaner location on the exposure to exhaled contaminants in hospital rooms
<p>Indoor environments with a deficient mechanical ventilation, could increase exposure to exhaled contaminants. This situation is critical in hospital environments such as hospital rooms. In this situation, a portable air cleaner system based on high efficiency air filters maybe a solution by itself or combined with mechanical ventilation systems to reduce the concentration of aerosols in hospital room environments.</p> <p>In this study the influence of the location of a portable air cleaner based on high efficiency air filters on the exposure to exhaled contaminants of a health worker close to a patient lying on a bed was investigated.</p> <p>The experimental setup consists of a hospital room (40.84 m<sup>3</sup>) with two breathing thermal manikins, BTM. One BTM was lying on the bed (patient) and the other BTM was stand up near the bed (health worker). Each BTM has its own independent breathing system with the capability of performing different breathing flows. Both BTM inhale and exhale through the mouth with a respiration frequency of 17.90 min-1 (inhalation) and 16.43 min-1 (exhalation). Both has minute volume 9.46 (l/min) and tidal volume 0.55 l. The BTM lying on a bed, simulated the source of exhaled contaminants and exhales particles sized 0.57-0.76 µm.</p> <p>A total air flow rate of 150 m<sup>3</sup>/h (3.67 ACH) was used in all experimental tests. The total air flow rate was generated only by the air cleaner, only by the ventilation system or using a combination of the air cleaner and the ventilation system. The concentration of particles was measured in the inhalation of the standing BTM close to bed, and in other points of the room to analyse the influence of air cleaner location on the exposure to airborne contaminants.</p> <p>The results suggest that the air diffusion plays an important role in the exposure to exhaled contaminants in a hospital room. In these indoor environments, low values in the exposure to exhaled contaminants can be obtained using a combination of a portable air cleaner located near the source of contaminants and the ventilation system or using only 100% air flow rate in the ventilation system.</p>
Raw Data for the article: Efficacy of Three Commercial Disinfectants in Reducing Microbial Surfaces' Contaminations of Pharmaceuticals Hospital Facilities
<p>To evaluate and validate the efficacy of disinfectants used in our cleaning procedure, in order to reduce pharmaceutical hospital surfaces' contaminations, we tested the action of three commercial disinfectants on small representative samples of the surfaces present in our hospital cleanrooms. These samples (or coupons) were contaminated with selected microorganisms for the validation of the disinfectants. The coupons were sampled before and after disinfection and the microbial load was assessed to calculate the Log<sub>10</sub> reduction index. Subsequently, we developed and validated a disinfection procedure on real surfaces inside the cleanrooms intentionally contaminated with microorganisms, using approximately 10<sup>7</sup>-10<sup>8</sup> total colony forming units per coupon. Our results showed a bactericidal, fungicidal, and sporicidal efficacy coherent to the acceptance criteria suggested by United States Pharmacopeia 35 <1072>. The correct implementation of our cleaning and disinfection procedure, respecting stipulated concentrations and contact times, led to a reduction of at least 6 Log<sub>10</sub> for all microorganisms used. The proposed disinfection procedure reduced the pharmaceutical hospital surfaces' contaminations, limited the propagation of microorganisms in points adjacent to the disinfected area, and ensured high disinfection and safety levels for operators, patients, and treated surfaces.</p>
Supplementary data and information for 'Electron-Beam-Induced Carbon Contamination in STEM-in-SEM: Quantification and Mitigation'
<p>This repository contains supplementary data and information for the journal article "Electron-beam-induced carbon contamination in STEM-in-SEM: Quantification and mitigation" (https://doi.org/10.1093/micmic/ozac003).</p> <p>It provides comprehensive documentation of the thickness evaluation procedure based on STEM images. The thickness evaluation procedure is packed into a PYTHON library that can run using the provided exemplary images. It can also be adapted and applied to other images and individual settings, as described in the documentation file PythonTDL_Documentation.pdf. K. Adrion prepared the library based on the scripts written by her and M. Hugenschmidt, which were used for evaluating contamination thicknesses in the before-mentioned publication and on a conference poster: https://doi.org/10.5445/IR/1000135526.</p>
Raw data for 'Electron-Beam-Induced Carbon Contamination in STEM-in-SEM: Quantification and Mitigation'
<p>This repository contains the raw data of the figures in the journal article 'Electron-Beam-Induced Carbon Contamination in STEM-in-SEM: Quantification and Mitigation' (https://doi.org/10.1093/micmic/ozac003)</p>
Contaminations on Lidar Sensor Covers: Performance Degradation including Fault Detection and Modeling as Potential Applications
<p><strong>Data description of contamination measurements with lidar sensors RIEGL LD05-A20 and Ouster OS1-64</strong></p> <p><em><strong>Photos of the measurement setup</strong></em></p> <p>We provide photos of the measurement setup and the contaminations applied in the folder "/photos".</p> <p> </p> <p><em><strong>Riegl LD05-A20 data</strong></em></p> <p>The data of the Riegl LD05-A20 can be found in the folder "riegl_LD05-A20_full_waveforms" - one file per experiment. An example notebook for reading the data is provided in "/notebooks/example_riegl_LD05-A20.ipynb". Note that the files contain only the prominent peaks of the full waveform calculated by the V08Wave software provided by RIEGL. If you are interested in the entire full waveforms, please contact the authors.</p> <p> </p> <p><em><strong>Ouster OS1-64</strong></em></p> <p>The data of the Ouster OS1-64 can be found in the folder "ouster_OS1-64_point_clouds" - one folder per experiment. An example notebook for reading the data is provided in "/notebooks/example_ouster_OS1-64.ipynb". The python package <strong><em>pointcloudset</em></strong> (https://github.com/virtual-vehicle/pointcloudset) and its documentation is suggested for further data analytics of the point cloud data.</p> <p> </p>
Supp. Info. for Further analysis of metagenomic datasets containing GD and GX pangolin CoVs indicates widespread contamination, undermining pangolin host attribution
<p>Supplemanty Information for <strong>Further analysis of metagenomic datasets containing GD and GX pangolin CoVs indicates widespread contamination, undermining pangolin host attribution</strong></p> <p>Files:</p> <p>Supp_Info_1_PRJNA641544_DG14_DG18.xlsx</p> <p>Supp_Info_3_PRJNA606875_SRR11093270_reads_blast_nt_seq5_hsps1_PCT80_E0.05_hsps.txt</p> <p>Supp_Info_4_PRJNA573298_Analysis.xlsx</p>
Dataset and code for "Modelling the potential for peat-block transplants to restore industrially contaminated Sphagnum peatlands"
<p>Code to run simulations and dataset from HYDRUS-1D simulations used in the revised manuscript titled "Modelling the potential for peat-block transplants to restore industrially contaminated Sphagnum peatlands" submitted to Ecological Engineering</p>
Draft Genome sequencing of Nocardia sp. strain WB46 Isolated from Salix purpurea Growing in a Site Chronically Contaminated by Petroleum Hydrocarbons
<p>Assembled contigs of the genome of <em>Nocardia</em> sp. strain WB46 isolated from <em>the rhizosphere of Salix purpurea </em>growing in a site chronically contaminated by petroleum hydrocarbons located at Varennes, Qubec, Canada.</p>
Results from national testing programs on the occurrence of chemical contaminants in food and feed - Switzerland
<p>In the framework of Articles 23 and 33 of Regulation (EC) No 178/2002 EFSA has received from the European Commission a mandate (M-2010-0374) to collect all available data on the occurrence of chemical contaminants in food and feed. These data are used in EFSA’s scientific opinions and reports on contaminants in food and feed. </p> <p>The presence of unauthorised substances or chemical contaminants in food may pose a risk factor for public health and can cause a negative impact on the quality of food. </p> <p>Commission Recommendations and Regulations on occurrence monitoring are in place for several contaminants of interest, some of which can be found here below: </p> <ul> <li>Commission Regulation (EU) 625/2017, on the application of food and feed law</li> <li>Commission Delegated Regulation (EU) 2022/931</li> <li>Commission Implementing Regulation (EU) 2022/932</li> <li>Commission Regulation (EU) 2023/915, on maximum levels for certain contaminants in food and repealing Regulation (EC) No 1881/2006</li> </ul> <p>These datasets contain the results of sampling that was designed according to national testing programs for a variety of contaminants in food and feed, as reported under the Chemical Monitoring Data Collection 2023 split by sampling year (data element ‘sampY’). </p> <p>More details are available in last year's finalised call for data ‘<a href="https://www.efsa.europa.eu/en/call/call-continuous-collection-chemical-contaminants-occurrence-data-food-and-feed-2023">Call for continuous collection of chemical contaminants occurrence data in food and feed | EFSA (europa.eu)</a>’.</p> <p>REPORTING AUTHORITIES CONTRIBUTING TO EACH DATA COLLECTION: </p> <p>OCC-CHEMMON2023 – Federal Food Safety and Veterinary Office</p>
Deep microbiome-based characterization of the alterations in resident bacterial communities of pasteurized bovine milk contaminated with Salmonella Typhimurium over time
Open the record for dataset details and reuse information.
Consumption of pollen contaminated with field-realistic concentrations of fungicide cause sub-lethal effects in common eastern bumble bee (Bombus impatiens [Hymenoptera]: [Apidae]) microcolonies
<p>Bumble bees are declining across the globe. Causes of this decline have been attributed to a variety of stressors, including pesticides. Fungicides are a type of pesticide that have been understudied in the context of bumble bee health. As a result, fungicides are often applied to flowering plants without consideration of pollinator exposure. Recent work demonstrates that fungicides have sublethal effects in bumble bees, but little is known about how much fungicide it takes to cause these sublethal effects. To address this gap in the literature, we fed microcolonies of the common eastern bumble bee (<em>Bombus impatiens</em>) pollen contaminated with a range of fungicide concentrations. We chose these concentrations based on the range of fungicide concentrations in pollen and nectar that were reported in the literature. Results revealed that later-stage pupae and newly emerged males are potentially sensitive to fungicide exposure, showing smaller size and reduced fat reserves at intermediate levels of contamination. Compared to the control, intermediated levels of fungicide-contaminated pollen led to increased pupal mortality and delayed male emergence. Contrary to expectations, higher fungicide levels did not exhibit a linear relationship with negative impacts, suggesting nuanced effects. Because body size and emergence timing are important aspects of bumble bee reproductive behavior, results have implications for mating success, potentially disrupting colony development.</p>
Analysis Data, "Strain dynamics of contaminating bacteria modulate the yield of ethanol biorefineries"
<p>This package contains datasets in `Rdata` format underlying analyses presented in the study "Strain dynamics of contaminating bacteria modulate the yield of ethanol biorefineries", first available as a preprint on February 08, 2021:</p> <p><a href="https://www.biorxiv.org/content/10.1101/2021.02.07.430133v1.article-info">https://www.biorxiv.org/content/10.1101/2021.02.07.430133v1.article-info</a></p>
Investigating the Effects of Laser Wavelengths and Other Ablation Parameters on the Detection of Biogenic Elements and Contaminants in Hydroxyapatite - JAAS - Dataset
<p>The dataset provided contains measurements for an article in The Journal of Analytical Atomic Spectrometry (JAAS). Further details are available in the .txt file included in the folder.</p>
Decadal delays in groundwater recovery from nitrate contamination caused by low O2 reduction rates
<p>Dataset for the Publication 'Decadal delays in groundwater recovery from nitrate contamination caused by low O<sub>2</sub> reduction rates' in Water Resources Research.</p>
Mass spectrometry analysis of contaminating band in HTT samples 2019/10/31
<p><strong>Project: </strong>Biophysical investigation of purified HTT protein samples</p> <p><strong>Experiment: </strong>Mass spectrometry analysis of contaminating band in HTT samples</p> <p><strong>Date completed:­ </strong>2019/10/31</p> <p><strong>Rationale: </strong>To determine the identity of ~100 kDa band seen on SDS-PAGE in HTT preps – see <a href="https://zenodo.org/record/3555378">https://zenodo.org/record/3555378</a></p>
Large-scale purification of Q23 HTT-HAP40 from Sf9 expression system with contaminating nucleic acid material 2019/09/16
<p><strong>Project: </strong>Biophysical investigation of purified HTT protein samples</p> <p><strong>Experiment: </strong>Large-scale purification of Q23 HTT-HAP40 from Sf9 expression system with contaminating nucleic acid material</p> <p><strong>Date completed:­ </strong>2019/09/16</p> <p><strong>Rationale:</strong> To purify HTT-HAP40 + Sf9 derived nucleic acid material for cryoEM analysis</p>
Figure 1 in Heavy metal (cadmium, lead, and chromium) contamination in farmed fish: a potential risk for consumers' health
Figure 1. Map of the study area.
Figure 3 in Diversity of zooplankton in municipal wastewater-contaminated urban pond ecosystems of the lower Gangetic plains
Figure 3. Proportional abundance of different representative groups of zooplankton at study sites.
Figure 1 in Diversity of zooplankton in municipal wastewater-contaminated urban pond ecosystems of the lower Gangetic plains
Figure 1. Map showing the study sites (Site 1–5) within Hooghly-Chinsurah Municipality.
Figure 2 in Diversity of zooplankton in municipal wastewater-contaminated urban pond ecosystems of the lower Gangetic plains
Figure 2. Abundance of different representative groups of zooplankton at study sites.
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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)
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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.