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163 results for “biodegradability”
Data for publication "Selected Simple Natural Antimicrobial Terpenoids as Additives to Control Biodegradation of Polyhydroxy Butyrate"
<p><strong>Abstract</strong></p> <div>In this experimental research, different types of essential oils (EOs) were blended with polyhydroxybutyrate (PHB) to study the influence of these additives on PHB degradation. The blends were developed by incorporating three terpenoids at two concentrations (1 and 3%). The mineralization rate obtained from CO<sub>2</sub> released from each sample was the factor that defined biodegradation. Furthermore, scanning electron microscope (SEM), differential scanning calorimetry (DSC), and dynamic mechanical analysis (DMA) were used in this research. The biodegradation percentages of PHB blended with 3% of eucalyptol, limonene, and thymol after 226 days were reached 66.4%, 73.3%, and 76.9%, respectively, while the rate for pure PHB was 100% after 198 days, and SEM images proved these results. Mechanical analysis of the samples showed that eucalyptol had the highest resistance level, even before the burial test. The other additives showed excellent mechanical properties although they had less mechanical strength than pure PHB after extrusion. The samples’ mechanical properties improved due to their crystallinity and decreased glass transition temperature (Tg). DSC results showed that blending terpenoids caused a reduction in Tg, which is evident in the DMA results, and a negligible reduction in melting point (Tm).</div> <div> </div> <p>Data for publication contains: Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC), and Dynamic Mechanical Analysis (DMA) figures and images for samples</p> <p>Full publication can be found here: <em>https://zenodo.org/records/13785631</em></p>
Effect of Environmental Weathering on Biodegradation of Biodegradable Plastic Mulch Films under Ambient Soil and Composting Conditions
<p>Plastic mulch films contribute to better crop production. Concerns for lack of sustainable disposal methods for conventional polyethylene (PE) mulch led to development of biodegradable plastic mulches (BDMs) that can be soil-incorporated or composted after use. Environmental weathering of BDMs during crop growth reduces their mechanical strength and alters the molecular structure of their polymeric components. However, the impact of weathering on BDMs' biodegradability is not fully understood. The biodegradability of agriculturally weathered and unweathered BDMs in soil and compost was compared using standardized laboratory tests (ASTM D5988 and D5338) using four BDMs (experimental polylactic acid and polyhydroxyalkanoate-based film [PLA/PHA] and three commercially available polybutyrate [PBAT]-based BDMs). In soil, biodegradation of weathered PLA/PHA was greater than its unweathered counterpart. For PBAT-based BDMs, the extent of biodegradation varied. A decrease of the weight-averaged molecular weight (M<sub>w</sub>) of PBAT and PLA and thermostability of PLA, PHA, PBAT, and starch components was observed during biodegradation in the soil. The proportion of the minor components PHA and starch decreased during biodegradation, indicating preferential utilization of PHA over PLA and starch over PBAT by microbes. Bacterial abundance was significantly higher than fungal abundance in soil and was more prominent in soil adjacent to weathered than unweathered BDM treatments. Under composting conditions, unweathered PBAT-enriched mulches yielded higher CO<sub>2</sub> evolution than their weathered counterpart. Together, these results suggest that environmental weathering enhances biodegradation of BDMs and mulch's polymeric constituents also influence the microbial degradation, more so for bacterial than fungal communities.</p>
Supporting data for the manuscript entitled: Long-term biodegradation of oil under Arctic Conditions: the Baffin Island Oil Spill (BIOS) revisited after almost four decades.
<p>The potential of an unintentional oil spill from ships or upcoming oil development is rising as the Arctic warms up more. It is crucial to understand how oil behaves in this setting and what influences oil biodegradation in the Arctic. On Baffin Island in the Canadian High Arctic, the Baffin Island Oil Spill (BIOS) project staged a number of simulated oil spills on the backshore zone of beaches in the 1980s. Two BIOS sites were revisited in 2019, about 40 years after the first oil pollution, providing a unique chance to research the long-term weathering of crude oil in Arctic conditions. Here, we demonstrate that even after over 40 years, residual oil is still detectable at these locations. Oil at both locations seems to deteriorate relatively slowly, with estimated loss rates ranging from 1.8 to 2.7% annually and appearing to vary across the two locations. We also demonstrate how the locations' sediment microbial communities are still severely impacted by leftover oil, as seen by a decline in diversity, variations in microbial load, and an enrichment of reported oil-degrading bacteria in contaminated sediments. The most enriched putative oil degraders were found in non-oiled control sediments as well, indicating that these degraders are a normal component of the Arctic sediment microbiome even in the absence of oil. Reconstructed genomes of putative oil degraders indicate that only a portion of these degraders have unique adaptations for growth in psychrothermic environments. This study's findings taken together demonstrate that oil spills in the Arctic can linger and have a lasting, major impact on the environment for decades.</p>
ELECTRA_826244_CNR_BIODEGRADATION_01_1.0.0
<p>Dataset used for assessing the potential and efficacy of electrobioremediation technologies being developed</p>
Biodegradable polymers boost reproduction in the earthworm Eisenia fetida
<p><strong>Background</strong>:</p> <p>The microbiome profiling analysis of the mentioned publication was conducted using the <a href="http://www.qiime2.org">QIIME2 </a>analysis plattform. In addition to the final results presented in the publication, this dataset provides access to selected QIIME2 data (artifacts and visualizations) in order to allow view/reuse of these data in other projects. Artifact (.qza) data can be used by the QIIME2 software, Visualizations (.qzv) data can be viewed by <a href="https://view.qiime2.org/">QIIME2view</a>. </p> <p>If you are interested in additional data, please contact Alfons R. Weig.</p> <p><strong>Description of the dataset:</strong></p> <ul> <li>Abundance table (not filtered): table.qza / table.qzv</li> <li>Representative sequences / ASVs (not filtered): representative_sequences.qza / representative_sequences.qzv</li> <li>Abundance table (filtered, see paper): table-filtered.qza / table-filtered.qzv</li> <li>Representative sequences / ASVs (filtered, see paper): representative_sequences-filtered.qza / representative_sequences-filtered.qzv</li> <li>Taxonomic classification: classification.qza / classification.qzv</li> <li>Taxonomic barplot (interactive): taxa-barplot.qzv</li> </ul>
Soil-biodegradable plastic films do not decompose in a lake sediment over 9 months of incubation
<p>Dataset with the article 'Soil-biodegradable plastic films do not decompose in a lake sediment over 9 months of incubation', containing CO2 and CH4 data of sediment core incubations in a laboratory setting.</p> <p>Time is in days.</p> <p>Group identifiers: PC = control, PE = PE plastics (traditional), PR = Biodegradable plastics type 1, PS = biodegradable plastics type 2.</p>
Data from: Impact of agricultural weathering on physicochemical properties of biodegradable plastic mulch films: comparison of two diverse climates over four successive years
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Data from: Biodegradable microplastics can cause more serious loss of soil organic carbon by priming effect than conventional microplastics in farmland shelterbelts
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Effect of Environmental Weathering on Biodegradation of Biodegradable Plastic Mulch Films under Ambient Soil and Composting Conditions
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Data from: Microplastic biodegradability does not modify plant carbon input in soil but accelerate soil carbon loss in agroecosystems
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Data from: Exceptional preservation requires fast biodegradation: the case study of thylacocephalan specimens from La Voulte-sur-Rhône (Callovian, Jurassic, France)
<p>Konservat-Lagerstätten are seen as snapshots of past biodiversity for a given location and time. Yet, processes leading to the exceptional morphological preservation of fossils in these deposits remain incompletely understood. This results in the deficient assessment of taphonomic biases and limits the robustness/relevance of palaeobiological reconstructions. Here, we report the mineralogical characterization of crustacean fossils preserved within carbonate-rich concretions from the Jurassic Konservat-Lagerstätte of La Voulte-sur-Rhône (Ardèche, France). The combination of SEM-EDS, TEM, synchrotron-based XRF, XRD and XANES allows identifying the mineralogical phases composing these fossils (i.e. fluorapatite, Fe-sulfides (pyrite, pyrrhotite) and Mg-calcite) and the surrounding matrix (i.e. Mg-calcite, clays and detrital silicates). Fluorapatite and pyrite (and pyrrhotite) precipitated during decay under anoxic conditions, replacing delicate organic structures and preserving anatomical details. These mineral structures were subsequently consolidated by a Mg-calcite cement. Of note, histologically similar tissues were replaced by the same mineral phases, confirming that 'fossilization [in La Voulte] occurred rapidly enough to be influenced by tissue composition'. Altogether, the present study shows that exceptional preservation requires fast biodegradation, thereby confirming recent experimental evidence.</p>
Reproduction, growth and oxidative stress in the earthworm Eisenia andrei exposed to conventional and biodegradable mulching film microplastics
<p>Dataset on Earthworm (<em>Eisenia andrei</em>) exposed to <span>of low-density polyethylene microplastics (PE-MP) and polybutylene adipate terephthalate biodegradable microplastics (PBAT-BD-MP) originating from mulching films. The study utilized seven concentrations (0, 0.005, 0.05, 0.1, 0.5, 1, and 5% w/w) in five replicates. Survival, growth, and oxidative stress responses of the earthworms were analysed after four weeks of exposure. Measured biomarker responses were superoxide dismutase, catalase, glutathione reductase, glutathione S-transferase, glutathione, and lipid peroxidation. Additionally, the Integrated Biomarker Response Index (IBR) was conducted to assess the overall oxidative stress status of the earthworms. The number of biomass of the juveniles were recorded after four additional weeks. The total length of the experiment was eight weeks. Soil water holding capacity (WHC) was analysed in the beginning of the experiment and soil pH in the beginning and end of the experiment. The study was conducted at the Finnish Environment Institute (Syke) Under project PAPILLONS (EU Horizon). </span></p>
Figs. 1–5 in Nothing is Perfect: Biodegradable Packing Material as Food and Transportation for a Museum Pest,Lasioderma serricorne(F.) (Coleoptera: Anobiidae)
Figs. 1–5. Lasioderma serricorne in starch-based packing peanuts. 1) Adults (2.4 mm long); 2) Two teneral adults in a whole peanut (a) and just below the peanut surface (b); 3) Eggs (0.17 mm long); 4) Pupa dissected from a peanut; 5) Teneral adult and its larval exuviae dissected from a peanut.
In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants
<p><strong>Dataset for Thermal, Molecular, and Optical Characterization of PDLLA Optical Fibers</strong></p> <p><span>Parinaz Abdollahian<sup>a,b</sup>,<sup> </sup>Kunyang Sui<sup>a,b</sup>, Guanghui Li<sup>b</sup>, Jiachen Wang<sup>a</sup>, Cuiling Zhang<sup>a</sup>, Yazhou Wang<sup>a</sup>, Rune W. Berg<sup>b</sup>, Marcello Meneghetti<sup>a,b</sup>, and Christos Markos<sup>*a</sup></span></p> <p><span><span>a. Department of Photonics and Electronic Engineering, Denmark Technical University, Denmark</span></span></p> <p><span><span>b. Department of Neuroscience, Copenhagen University, Copenhagen, Denmark</span></span></p> <p><strong>Description</strong>:<br>This dataset includes the experimental data and characterization results for amorphous poly(D,L-lactic acid) (PDLLA) optical fibers used in the study titled "In vivo evaluation of thermally drawn biodegradable optical fibers as brain implants." The dataset comprises the following key measurements:</p> <ol> <li><strong>Differential Scanning Calorimetry (DSC)</strong>: <ul> <li>Thermograms of PDLLA granules as purchased and after quenching, used to analyze thermal transitions.</li> </ul> </li> <li><strong>Gel Permeation Chromatography (GPC)</strong>: <ul> <li>Molecular weight data of PDLLA before and after in vivo degradation.</li> </ul> </li> <li><strong>Optical Transmission</strong>: <ul> <li>Spectral data for PDLLA fibers of different diameters (150 µm, 250 µm, and 320 µm) and their transmission properties before and after in vitro degradation in phosphate-buffered saline (PBS).</li> </ul> </li> </ol> <p><strong>Purpose</strong>:<br>The data support the evaluation of the thermal stability, molecular degradation, and optical performance of PDLLA fibers under in vitro and in vivo conditions. The goal is to assess their suitability as biodegradable neural interfaces for biomedical applications.</p> <p><strong>Methods</strong>:</p> <ul> <li>DSC was performed on a Q 2000 instrument with a temperature range of -10°C to 200°C at a heating rate of 10°C/min and a cooling rate of 50°C/min.</li> <li>GPC was conducted using a TOSOH HLC-8320 to measure molecular weight distributions.</li> <li>Optical transmission was characterized using a broadband supercontinuum source (NKT SuperK Extreme) and an ANDO AQ-6315A optical spectrum analyzer.</li> </ul> <p><strong>File Contents</strong>:</p> <ul> <li>DSC raw and processed data for granules and quenched PDLLA.</li> <li>GPC chromatograms and molecular weight calculations.</li> <li>Transmission spectra for PDLLA fibers, including pre- and post-degradation measurements.</li> </ul>
Effects of pH and light exposure on the survival of bacteria and their ability to biodegrade organic compounds in clouds: Implications for microbial activity in acidic cloud water
<p>Our manuscript was submitted to ACP. Upon submission, all data must be accessible by anonymous access.</p>
Análisis de residuos lignocelulósicos provenientes de procesos agroindustriales de la región del Cauca con potencial para el desarrollo de polímeros biodegradables
<p>Entre los principales problemas socio-ambientales de la actualidad se destacan, la dependencia de los recursos fósiles y la disposición de residuos, que han llevado a la instauración de reglamentaciones y/o políticas públicas, para mitigar los impactos producidos por estos. En este sentido, vale destacar que los residuos lignocelulósicos son considerados como una de las materias primas renovables más abundantes y promisorias a nivel global. De esta forma, el aprovechamiento parcial, o incluso total, de los residuos agroindustriales lignocelulósicos, no solo es una ventaja desde el punto de vista ambiental, sino que también podría resolver algunos problemas económicos. De hecho, esto puede conducir a la minimización de la disposición de residuos mediante el tratamiento o la gestión de estos y al desarrollo de bioproductos con alto valor agregado basados en los sistemas de economía circular.</p>
Data: Impact of forest harvesting intensity and water table on biodegradability of dissolved organic carbon in boreal peat in an incubation experiment.
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Poly-3-hydroxybutyrate, a crystal-mobile biodegradable polyester
<p>This Dataset comprises the raw data contained in the figures of our journal article in <em>Macromolecules </em>(DOI: 10.1021/acs.macromol.4c00938) and its Supporting Information (SI)<em>. </em>We provide a preprint of the initially submitted article including the SI for reference to the figures and their captions, necessary to use the data. Note that a few figures have changed upon revision, so please also check the published article. For copyright details and licensing we refer to the published article and the publisher. Here is the abstract of the article:</p> <p>Poly(3-hydroxybutyrate), a biodegradable thermoplastic with potential to partially replace oil-based commodities, suffers from embrittlement over storage time. We here investigate possible causes by monitoring changes in mechanical and thermal properties as well as the semicrystalline morphology (crystallinity, lamellar stack dimensions and its inhomogeneity) over time, using advanced small-angle X-ray scattering analyses for the latter. We find that the slow rise in the shear modulus of the materials is accompanied by secondary crystallization, detected as a lamellar thickening and an increase of the melting point. These morphology changes may be due to chain mobility in the crystallites. This is a feature of "crystal-mobile" polymers that are known to be able to crystallize more fully than their crystal-fixed counterparts. We present first evidence of the related crystalline <em>α<sub>c</sub></em>-relaxation in P3HB by dynamic-mechanical analysis (DMA) and investigate the process microscopically by advanced magic-angle spinning solid-state exchange NMR techniques, specifically centerband-only detection of exchange. We show that monomer jumps in the P3HB crystals are comparably slow (i.e., with an average correlation time <em>τ<sub>c</sub></em> of 0.1 s at 120 °C). Their apparent activation energy (80-90 kJ/mol) is found to be independent of the crystallization temperature and in good agreement with the DMA results.</p>
Biogeosciences paper data for Hasanyar et al. "How much do bacterial growth properties and biodegradable dissolved organic matter control water quality at low flow?"
<p>The proposed dataset is related to the following publication:<br> Hasanyar, M., Romary, T., Wang, S., Flipo, N. (2023) How much do bacterial growth properties and biodegradable dissolved organic matter control water quality at low flow? Biogeosciences</p> <p>It consists in command files for the c-rive0.32 software available here<br> Shuaitao Wang, Lauriane Vilmin, Masihullah Hasanyar, & Nicolas Flipo. (2023). C-RIVE (0.32). Zenodo. https://doi.org/10.5281/zenodo.7849609</p> <p><br> To run the model :<br> 1. Compile crive0.32<br> 2. Copy the executable in the current directory<br> 3. In a terminal launch<br> > ./crive0.32 ./sensitivity.COMM test.log</p> <p>The “sensitivity.COMM” holds the settings for the C-RIVE simulation related to the paper mentioned in the front head of the current file<br> The information on different parameters of “sensitivity.COMM” are included in “layers”, “meteo” and “param_bio” folders.<br> The layer folder holds the information about the initial conditions of the model (Table 2 in the article).<br> The “meteo” folder holds the meteorological information and finally the “param_bio” folder holds the information on physiology of bacteria, phytoplankton and other model species.</p> <p><br> The output files are written in $HOME/OUTPUT_CRIVE. It is possible to change it directely in sensitivity.COMM, second entry 'OUTPUT_FOLDER'</p>
Intra-patient Study With Polymer Free Drug Eluting Stent Versus Abluminal Biodegradable Polymer Drug Eluting Stent With Early OCT (Optical Coherence Tomography) Follow up
ClinicalTrials.gov study NCT02785237. IPD Sharing: Not stated. Countries: 1. Publications: 32.
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.