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240 results for “Polyethylene”
Study Comparing Marathon Polyethylene and Enduron Polyethylene Acetabular Liners Used in Total Hip Arthroplasty
ClinicalTrials.gov study NCT01121146. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Study to Investigate Prucalopride vs. Polyethylene Glycol 3350 on Colon Activity
ClinicalTrials.gov study NCT01707667. IPD Sharing: Not stated. Countries: 3. Publications: 1.
Polyethylene tarping elevates temperature and reduces emergence of <em>Phloeosinus punctatus</em> LeConte (Coleoptera: Curculionidae) from giant sequoia debris piles
Open the record for dataset details and reuse information.
Chemical upcycling of polyethylene, polypropylene, and mixtures to high-value surfactants
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Role of the intestinal microbiome in polyethylene degradation by caterpillar larva of the greater wax moth (Galleria mellonella)
<p>Recently, a few insects, including the caterpillar larva of the greater wax moth <i>Galleria</i><i> mellonella</i>, have been identified as avid "plastivores". Interestingly, these caterpillars are able to ingest and metabolize polyethylene at unprecedented rates. While it appears that <i>G. mellonella</i> plays an important role in the biodegradation process, the contribution of its intestinal microbiome remains poorly understood and contested. In a series of experiments, we present strong evidence of an intricate relationship between an intact microbiome, low density polyethylene (LDPE) biodegradation, and the production of glycol as a metabolic by-product. First, we biochemically confirmed that <i>G. mellonella</i> larvae consume and metabolize LDPE, as individual caterpillars fed on polyethylene excreted glycol, but those excretions are reduced by antibiotic treatment. Further, while the gut bacterial communities remain relatively stable regardless of diet, we show that during the early phases of feeding on LDPE (24-72 hrs), caterpillars exhibit increased microbial abundance relative to those starved or fed on their natural honeycomb diet. Finally, by isolating and growing gut bacteria with polyethylene as their exclusive carbon source for over one year, we identified microorganisms in the genus <i>Acinetobacter</i> that appear to be involved in this biodegradation process. Taken collectively, our study indicates that during short term exposure, the intestinal microbiome of <i>G. mellonella </i>is intricately associated with polyethylene biodegradation <i>in vivo</i>.</p>
Experimental dataset: stereo-DIC experiment on uniaxially loaded, S-Shaped, high density polyethylene test sample
<p>Stereo-DIC experiments were performed on uniaxially loaded, s-shaped, high-density polyethylene test sample. 100 stationary images of unloaded test sample were taken for evaluation of DIC noise floor. Stereo calibration image dataset, involving a calibration target with rectangular grid (12 by 9 and pitch of 10 mm), is also made available. Tensile load from the test bench load-cell sampled at each moment an image is captured is available. </p>
Transient test on laboratory high-density polyethylene pipeline
<p>The file includes pressure signals acquired at three measurement sections during a transient test on a homogeneous high-density polyethylene pipeline installed at the Water Engineering Laboratory (WEL) of the University of Perugia. The sampling frequency was 2048 Hz.</p>
Molecular Dynamics Study on the Shock Induced Spallation of Polyethylene
<p>This repository contains the LAMMPS models (data files) we used in our recent work. More information and the required LAMMPS files to run shock simulations are available here: https://github.com/nuwan-d/shock_response_pe</p> <p> </p>
Dataset for Environmentally Degraded Polyethylene and Polypropylene
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Raw data for the article "In vitro culture of leukemic cells in collagen scaffolds and carboxymethylcellulose-polyethylene glycol gel"
<p>Uncropped original micrographs and raw numerical data of figures and tables from the article submitted to PeerJ. </p>
Fig. 5 in Alterations in nepetalactone metabolism during polyethylene glycol (PEG)- induced dehydration stress in two Nepeta species
Fig. 5. The expression of selected transcription factors (COI1, JAZ3, MYC2, MYB and YABBY5) during PEG-induced dehydration stress in Nepeta rtanjensis (a) and N. argolica ssp. argolica (b) leaves at 1, 3 and 6 days of PEG treatment (DPT). Obtained values were normalized against NrGAPDH (a) and NaGAPDH (b) as the endogenous controls and presented relatively to their respective controls as calibrators. Results are presented as the means ± SD of three biological replicates. Asterisks (*) denote significant differences between PEG-treated and non-treated plants (unpaired t-test, *p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001). Abbreviations: COI1- coronatine-insensitive 1, JAZ3-jasmonate ZIM-domain 3, MYC2- transcription factor Mouse-ear cress 2, MYB- transcription factor containing MYB-domain, YABBY5- YABBY5 transcription factor, GADPH- glyceraldehyde-3-phosphate dehydrogenase. Heatmaps of Pearson correlations of the absolute expression values for nepetalactone biosynthetic genes and transcription factors in N. rtanjensis (c) and N. argolica ssp. argolica (d). Correlation coefficients are shown in the lower triangle, while statistical significance (p <0.01) is marked with an asterisk at the appropriate positions in the upper triangle. Each square indicates the Pearson's correlation coefficient for a pair of genes, and the value of the correlation coefficient is represented by the intensity of yellow (positive correlations) or grey (negative correlations) in N. rtanjensis, or green (positive) and grey (negative) in N. argolica ssp. argolica, as indicated on the colour scale (for the interpretation of the references to colour in this Figure legend, the reader is referred to the web version of this article). The correlogram is ordered based on hierarchical cluster analysis (HCA) performed on a distance matrix (1- correlation matrix: minimal distance for absolutely positively correlated and maximal distance for absolutely negatively correlated gene expression). Cluster agglomeration was done using the single-linkage clustering method. The dendrograms are shown on heatmap sides. Abbreviations: GPPS- geranyl diphosphate synthase, GES- geraniol synthase, G8O- geraniol 8-oxidase, 8HGO- 8-hydroxygeraniol oxidoreductase, IS- iridoid synthase, NEPS- nepetalactol-related short-chain dehydrogenase, COI1- coronatine-insensitive 1, JAZ3-jasmonate ZIM-domain 3, MYC2- transcription factor Mouse-ear cress 2, MYBtranscription factor containing MYB-domain, YABBY5- YABBY5 transcription factor, DPT-days of PEG treatment. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 1 in Alterations in nepetalactone metabolism during polyethylene glycol (PEG)- induced dehydration stress in two Nepeta species
Fig. 1. The exposure of N. rtanjensis and N. argolica ssp. argolica shoots to PEG-induced dehydration stress under in vitro conditions resulted in the alterations of morphological and physiological parameters. As revealed by SEM of leaf surfaces of non-treated (a and c) and PEG-treated (b and d) N. rtanjensis and N. argolica ssp. argolica plants, peltate glandular trichomes (PGT) preserve their morphology, while stomata (white arrows) are closed in PEG-treated leaves at 6 days of PEG treatment (6DPT). Morphological differences between non-treated (e and g) and PEG-treated plants (f and h) at 6DPT indicated tissue dehydration and turgor loss in both model species. As a measure of dehydration stress, fresh weight (FW) of shoots (i and k) and their relative water content (RWC) (j and l) were traced throughout 6 days of PEG treatment in both N. rtanjensis and N. argolica ssp. argolica shoots. PEG-treated N. rtanjensis (yellow bars) and N. argolica ssp. argolica plants (green bars) are compared with their respective controls (grey bars) at 1DPT, 3DPT and 6DPT. Error bars represent SE of three biological replicates. Asterisks (*) denote significant differences between PEG-treated and non-treated plants (unpaired t-test, *p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001). Abbreviations: DPT-days of PEG treatment. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 6 in Alterations in nepetalactone metabolism during polyethylene glycol (PEG)- induced dehydration stress in two Nepeta species
Fig. 6. The relative expressions of the nepetalactone biosynthesis candidate genes (a) and of transcription factors (b) in trichomes and abraded leaves of Nepeta rtanjensis were normalized against 18S rRNA gene as endogenous control, and expressed relative to abraded leaves as calibrators. Error bars indicate SD of three biological replicates, each analysed in technical triplicates. Asterisks (*) denote significant differences between trichomes and depleted leaves (paired t-test, *p ≤ 0.05; **p ≤ 0.001; ***p ≤ 0.0001). Light micrograph of detached leaf trichomes (c) showing individual peltate glandular trichomes (PGT) and non-glandular mechanical trichomes (MT), bar = 100 μm. The light microscope (Leica DM2000, Germany) was used for the analysis of detached trichomes from N. rtanjensis leaves and image capturing was acquired with Software Leica IM1000 (Leica, Germany). Abbreviations: GPPSgeranyl diphosphate synthase, GES- geraniol synthase, G8O- geraniol 8-oxidase, 8HGO- 8-hydroxygeraniol oxidoreductase, IS- iridoid synthase, NEPS- nepetalactol-related short-chain dehydrogenase, COI1- coronatine-insensitive 1, JAZ3- jasmonate ZIM-domain 3, MYC2- transcription factor Mouse-ear cress 2, MYB- transcription factor containing MYB-domain, YABBY5- YABBY5 transcription factor.
Fig. 3 in Alterations in nepetalactone metabolism during polyethylene glycol (PEG)- induced dehydration stress in two Nepeta species
Fig. 3. Proposed nepetalactone (NL) biosynthetic pathway in Nepeta rtanjensis (Nr) and N. argolica ssp. argolica (Na) constructed based on the partially characterized N. mussini pathway (Lichman et al., 2018) and known MIA pathway in Catharanthus roseus (Miettinen et al., 2014). Arrows represent characterized biosynthetic steps in N. mussinii (Nm) or C. roseus (Cr). Dashed arrows represent parts of the NL-biosynthetic pathway specific for N. rtanjensis and N. argolica ssp. argolica. Enzymes involved in N. rtanjensis NL-metabolism are marked bold yellow and the ones included in the pathway of N. argolica ssp. argolica are bold green. Question marks (?) indicate unknown enzymes. Extracted are UHPLC/SRM−MS2 chromatograms of cis,trans-NL, trans,cis-NL and dehydronepetalactone (DNL). Abbreviations: GPPgeranyl diphosphate, IPP- isopentenyl diphosphate, DMAPP- dimethylallyl diphosphate, GPPS- geranyl diphosphate synthase, GES- geraniol synthase, G8O- geraniol 8-oxidase, 8HGO- 8-hydroxygeraniol oxidoreductase, IS- iridoid synthase, NEPS- nepetalactol-related short-chain dehydrogenase. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 2 in Alterations in nepetalactone metabolism during polyethylene glycol (PEG)- induced dehydration stress in two Nepeta species
Fig. 2. UHPLC/DAD/(±)HESI−MS2 profiling of nepetalactones in non-treated (grey bars) and PEG-treated N. rtanjensis (yellow bars) and N. argolica ssp. argolica (green bars) shoots, grown under in vitro conditions. UHPLC−SRM (Single reaction monitoring) chromatograms and corresponding mass spectra (extracted) of trans,cis-NL (a) and DNL (b) in Nepeta rtanjensis, and of cis,trans-NL (f) and DNL (g) in N. argolica ssp. argolica leaves. The content of trans,cis-NL (c) and DNL (d) in leaves of N. rtanjensis, as well as the DNL/trans,cis-NL ratio at 1DPT, 3DPT and 6DPT (e) are presented relative to their respective controls. The same was for the cis,trans-NL (h) and DNL (i) content in N. argolica ssp. argolica leaves, and for the DNL/cis,trans-NL ratio (j). Error bars represent SE of three biological replicates. Asterisks (*) denote significant differences between PEG-treated and non-treated plants (unpaired t-test, *p ≤ 0.05; **p ≤ 0.01; ***p ≤ 0.001). Abbreviations: NLnepetalactone, DNL-dehydronepetalactone, DPT-days of PEG treatment. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Data points for "Modelling the thermodynamic properties of the mixture of water and polyethylene glycol (PEG) with the SAFT-γ Mie group-contribution approach
<p>A variety of thermodynamic calculations (LLE, enthalpy of mixing, etc.) performed with the SAFT-γ Mie equation of state on polyethylene glycol (PEG) + water mixtures. Please refer to the original article (published in Fluid Phase Equilibria) for the bibliography and more details.</p>
Polyethylene Wear Particle Analysis of TKA
ClinicalTrials.gov study NCT06426641. IPD Sharing: NO. Countries: 2. Publications: 2.
Study of the Wear of a Highly Cross-linked Polyethylene Acetabular Doped With Vitamin E and Coated With Titanium in Total Hip Replacement
ClinicalTrials.gov study NCT02524587. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Efficacy of Polyethylene Glycol vs Lactulose With Isabgol in Acute Fissure-in-Ano: PEGASIS Trial
ClinicalTrials.gov study NCT05341180. IPD Sharing: NO. Countries: 1. Publications: 5.
Heat Loss Prevention in Very Preterm Infants in Delivery Rooms: A Multicenter, Randomized, Controlled Trial of Polyethylene Occlusive Total Body Skin Wrapping
ClinicalTrials.gov study NCT01671241. IPD Sharing: Not stated. Countries: 1. Publications: 4.
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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
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.