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1,542 results for “Degradation”
Dataset for Cell aggregation is associated with enzyme secretion strategies in marine polysaccharide-degrading bacteria
<p>Dataset includes: </p> <p>1. Analysed source data for figures</p> <p>2. Raw time-lapse images and tracking data that were used to generate the analysis</p>
Plant water use strategies predict restoration success across degraded drylands
<ul> <li>Plant strategies for coping with water limitation are likely to mediate restoration outcomes in degraded dryland ecosystems. Tradeoffs in traits related to water acquisition and use can intensify in more arid environments, making their effects on dryland restoration success even more salient. However, isolating the effects of drought responses from those of other environmental factors, as well as identifying the specific drought resistance traits that influence restoration success, can be difficult.</li> <li>In the present study, we couple a controlled dry-down experiment with a cross-site restoration field trial of out-planted seedlings (RestoreNet) using a suite of dryland herbaceous plant species from the same seed sources. We quantified interspecific variation in physiological responses to drought, specifically reductions in stomatal conductance (g<sub>s</sub>) and stem water potential (SWP), by comparing well-watered control plants to those experiencing decreasing soil moisture.</li> <li>Drought responses of SWP and g<sub>s</sub> varied independently among species, but both were related to survival in the cross-site restoration field trial when effect sizes were aggregated across all sites. Responses were consistent with acquisitive water use strategies resulting in greater success, where species with greater declines in SWP or weaker declines in g<sub>s</sub> under drought had greater survival. The correlation between SWP drought response and survival also intensified in sites with lower accumulated precipitation following restoration.</li> <li>Differences among functional groups revealed two different paths to restoration success: forbs that maintain high g<sub>s</sub> and narrow safety margins to maximize exploitation of moisture pulses before going into drought dormancy, or C<sub>4</sub> grasses that maintain efficient water uptake in drying soils while risking cavitation. C<sub>3</sub> grass species varied between these two strategies.</li> <li> <em>Synthesis and applications</em>: Taken together, the results of this study and others conducted at RestoreNet sites indicate that while a diversity of physiological responses to drought may exist in dryland plant communities, successfully restoring herbaceous species through out-planting in degraded conditions is likely to be achieved with species that maximize water uptake via one of two strategies, with tolerance of low SWP being particularly important in the most arid settings.</li> </ul>
Data for: HPV upregulates MARCHF8 ubiquitin ligase and inhibits apoptosis by degrading the death receptors in head and neck cancer
<p>The membrane-associated RING-CH-type finger ubiquitin ligase MARCHF8 is a human homolog of the viral ubiquitin ligases Kaposi's sarcoma herpesvirus K3 and K5 that promote host immune evasion. Previous studies have shown that MARCHF8 ubiquitinates several immune receptors, such as the major histocompatibility complex II and CD86. While human papillomavirus (HPV) does not encode any ubiquitin ligase, the viral oncoproteins E6 and E7 are known to regulate host ubiquitin ligases. Here, we report that MARCHF8 expression is upregulated in HPV-positive head and neck cancer (HNC) patients but not in HPV-negative HNC patients compared to normal individuals. The MARCHF8 promoter is highly activated by HPV oncoprotein E6-induced MYC/MAX transcriptional activation. The knockdown of MARCHF8 expression in human HPV-positive HNC cells restores cell surface expression of the tumor necrosis factor receptor superfamily (TNFRSF) death receptors, FAS, TRAIL-R1, and TRAIL-R2, and enhances apoptosis. MARCHF8 protein directly interacts with and ubiquitinates the TNFRSF death receptors. Further, MARCHF8 knockout in mouse oral cancer cells expressing HPV16 E6 and E7 augments cancer cell apoptosis and suppresses tumor growth in vivo. Our findings suggest that HPV inhibits host cell apoptosis by upregulating MARCHF8 and degrading TNFRSF death receptors in HPV-positive HNC cells.</p>
A physical perspective of recurrent water quality degradation: a case study in the Jiangsu coastal waters, China
<p>This dataset is created for manuscript entitle of <strong>A physical perspective of recurrent water quality degradation: a case study in the Jiangsu coastal waters, China</strong> submitted to <em>Journal of Geophysical Research: Oceans</em>. This dataset should not be used without agreement from authors before the paper published.</p>
Resources for "Disaggregating the carbon exchange of degrading permafrost peatlands using Bayesian deep learning"
<p>This dataset contains all predictors, fluxes, and footprint weights used and described in our manuscript.</p>
Data from: Rotavirus NSP1 subverts the antiviral oligoadenylate synthetase-RNase L pathway by inducing RNase L degradation
<div>The interferon (IFN)-inducible 2′,5′-oligoadenylate synthetase (OAS)-RNase L pathway plays a critical role in antiviral immunity. Group A rotaviruses, including the simian SA11 strain, inhibit this pathway through two activities: an E3-ligase related activity of NSP1 that degrades proteins necessary for IFN signaling, and a phosphodiesterase (PDE) activity of VP3 that hydrolyzes the RNase L-activator 2′,5′-oligoadenylate. Unexpectedly, we found that a recombinant (r) SA11 double mutant virus deficient in both activities (rSA11-VP3H797R-NSP1ΔC17) retained the ability to prevent RNase L activation. Mass spectrometry led to the discovery that NSP1 interacts with RNase L in rSA11-infected HT29 cells. This interaction was confirmed through copulldown assay of cells transiently expressing NSP1 and RNase L. Immunoblot analysis showed that infection with wild-type rSA11 virus, rSA11-VP3H797R-NSP1ΔC17 double mutant virus, or single mutant forms of the latter virus all resulted in the depletion of endogenous RNase L. The loss of RNase L was reversed by addition of the neddylation inhibitor MLN4924, but not the proteasome inhibitor MG132. Analysis of additional mutant forms of rSA11 showed that RNase L degradation no longer occurred when either the N-terminal RING domain of NSP1 was mutated or the C-terminal 98 amino acids of NSP1 were deleted. The C-terminal RNase L degradation domain is positioned upstream and is functionally independent of the NSP1 domain necessary for inhibiting IFN expression. Our studies reveal a new role for NSP1 and its E3-ligase related activity as an antagonist of RNase L and uncover a novel virus-mediated strategy of inhibiting the OAS-RNase L pathway.</div>
Targeted protein degradation reveals BET bromodomains as the cellular target of Hedgehog Pathway Inhibitor-1
<p>Raw experimental data for the manuscript entitled 'Targeted protein degradation reveals BET bromodomains as the cellular target of Hedgehog Pathway Inhibitor-1'. This includes the data underlying all figures, DESeq2 files, modeling and MD simulations, and chemical compound characterization (NMR, LC-MS, HRMS). Also, the custom Matlab script to analyse cilium intensity from microscopy images is included (cilia-track_v4.0).</p>
Data for: How do harvesting methods applied in continuous-cover forestry and rotation forest management impact soil carbon storage and degradability in boreal Scots pine forests?
<p>Forest management affects soil carbon (C) storage through forest composition, microclimate and litter inputs. How two major forest management systems, continuous-cover forestry (CCF) and clear-cut-based rotation forest management (RFM), differ in their impact on soil C in boreal forests is still poorly understood, however. We compared their effects on soil organic carbon (SOC) storage and quality in boreal Scots pine <span>(<em>Pinus sylvestris</em></span> L.) dominated forests in eastern Finland. We tested the hypotheses that (1) colder microclimates and continuous litter inputs will lead to higher SOC stocks in CCF plots than in clear-cuts and (2) the more labile litter in clear-cuts with varying ground vegetation will enhance SOC decomposition rates. We sampled uncut mature forests, clear-cuts, retention-cuts and gap-cuts, in which we analysed SOC concentrations and calculated the stocks. We measured stand characteristics such as diameter-at-breast height, basal area, dominant tree height, and understorey species coverage of the various treatments and modelled the above- and belowground litter inputs based on these parameters. We used laboratory incubation and sequential fractionation of SOC to assess its degradability under standardized conditions. To estimate the decomposition rate in the various environments we incubated cellulose bags in situ. We assessed the impact of microclimate on SOC decomposition, using data from soil-temperature and soil-moisture field measurements. We quantified the microbial biomass C pool, using chloroform fumigation extraction to gain insight on the impact of forest management practice on soil microbes. The SOC concentrations and SOC stocks did not differ significantly between the treatments, despite the presence of a warmer microclimate and lower litter inputs in the clear-cut plots. However, we found differences in the quality of the SOC. Soils in clear-cut sites showed lower proportions of labile SOC compounds than did the other treatments. As hypothesized, the decomposition rates were elevated in clear-cuts, but were equally as high within the canopy gaps on gap-cut stands. Our work highlights that forest management affects the quality, degradability, long-term accumulation and storage of SOC. We conclude that the accumulation of labile compounds in uncut forests and retention-cuts, combined with the decreased decomposition rates, indicate a higher potential for future C accumulation in the soil than in clear-cuts.</p>
Fastq sequence files supporting: Assessing the degradation of environmental DNA and RNA based on genomic origin in a metabarcoding context
<p>Molecular tools of species identification based on eNAs (environmental nucleic acids; eDNA and eRNA) have the potential to greatly transform biodiversity science. However, the ability of eNAs to obtain "real-time" biodiversity estimates may be complicated by the differential persistence and degradation dynamics of the molecular template (eDNA or eRNA) and the barcode marker used. Here, we collected water samples over a 28-day period to comparatively assess species detection using eDNA and eRNA metabarcoding of two distinct barcode markers—a mitochondrial mRNA marker (COI) and a nuclear rRNA marker (18S)—following complete removal of <em>Arthropoda </em>taxa in a semi-natural freshwater system. Our findings demonstrate that <em>Arthropoda </em>community composition was largely influenced by marker choice, rather than molecular template, individual microcosm, or sampling time point. Further, although eRNA may capture similar species diversity as the established eDNA method, this finding may be marker dependent. Although we found little to no difference in decay rates observed among sample groups (COI eDNA, COI eRNA, 18S eDNA, 18S eRNA), this result is likely due to limitations in the ability of eNA-based metabarcoding to provide a strong correlation between true eNA copy numbers present in the environment and final read counts obtained (following the metabarcoding workflow). Collectively, our findings provide further support for the use of multi-marker assessments in metabarcoding surveys to unravel the broadest taxonomic diversity possible, highlight the limitations of eNA metabarcoding methods in providing accurate decay rate estimates, as well as establish the need for further comparative studies using both metabarcoding and single-species detection methods to assess the persistence and degradation dynamics of eNAs for a diverse range of taxa.</p>
Lipids of different phytoplankton groups differ in sensitivity to degradation: implications for carbon export
<p>Data were collected on seven cruises on a monthly basis from February to August in 2010 in the northern Adriatic Sea (RV001 (N 45°04.8', E 013°36.6'), SJ107 (N 45°02.9', E 013°19.0'), SJ105 (N 45°02.0', E 0.13°09.3'), SJ103 (N 45°01.0', E 012°59.6'), SJ101 (N 44°59.9', E 012°50.3'), and SJ108 (N 44°48.7', E 012°45.0')). </p> <p>A CTD probe (Seabird SBE25, Sea–Bird Electronics Inc., Bellevue, Washington, USA) was used to measure temperature and salinity. Total phosphorus, dissolved inorganic orthophosphates (PO<sub>4</sub><sup>3-</sup>), total inorganic nitrogen (TIN), including nitrates (NO<sub>3</sub>¯), nitrites (NO<sub>2</sub>¯), and ammonium (NH<sub>4</sub><sup>+</sup>)), were determined by spectrophotometric methods (Parsons et al., 1984) on board and immediately after sampling using Shimadzu UV-Mini 1240 spectrophotometer with 10 cm quartz cuvettes. Organic phosphorus concentration was calculated as the difference between total and inorganic phosphorus concentrations. Subsamples for the determination of chlorophyll <em>a</em> (Chl <em>a</em>) were filtered on Whatman GF/C filters and stored frozen at -20°C until further processing. Chl <em>a</em> concentrations were determined following 3 h extraction in 90% acetone (in the dark, with grinding), on a Turner TD–700 fluorimeter (Parsons et al., 1984).</p> <p>We preserved 200 mL of seawater with 2% neutralized formaldehyde (final concentration) and performed nano- and microphytoplankton determination and enumeration within one month of sampling. The stored sample was homogenized by gentle shaking, and a subsample was added to the Utermöhl sedimentation chamber (volume: 50 mL; Hydro-Bios Apparatebau, Altenholz, Germany), where it settled for ~30 h. We performed the analysis on a Zeiss Axiovert 200 (Zeiss, Jena, Germany) following the inverted microscope method (Utermöhl, 1958, Hasle 1978). Total phytoplankton included all species counted in the microphytoplankton (20–200 µm) and nanophytoplankton (2-20 µm) groups (Sieburth et al., 1978). Taxa were identified to species level and subsequently grouped to diatoms, dinoflagellates, and nanophytoplankton coccolithophores and phytoflagellates (which included chlorophytes, chrysophytes, cryptophytes and prasinophytes) according to Tomas (1997).</p> <p>For POC determination, 1 L of seawater was filtered on board through 0.7 mm Whatman GF/F filters precombusted at 450 °C/5h. After filtration, the filters were rinsed with Milli-Q water to remove salts and stored in liquid nitrogen on board and at -80 <sup>o</sup>C in the laboratory until analysis. POC was analyzed using an SSM–5000A solid sample module connected to a Shimadzu TOC–V<sub>CPH</sub> carbon analyzer calibrated with glucose (Sugimura and Suzuki, 1988). POC concentrations were corrected based on filter blank measurements. The average filter blank value including the instrument blank value corresponded to 5 mg C L<sup>-1</sup>. The reproducibility obtained for the glucose standard was 3%.</p> <p>For particulate lipid analysis, we collected 3 L of seawater prefiltered through a 200 μm stainless steel screen to remove larger particles including microzooplankton. Lipids were collected on through precombusted (450 °C/5h) 47 mm GF/F filters and stored in liquid nitrogen until lipid extraction. It was performed using a modified one-phase solvent mixture of dichloromethane-methanol-water procedure (Bligh and Dyer, 1959; Vrana et al., 2023). In short, in order to assess recoveries in later stages of sample analysis we added 5 µg of standard methyl stearate to the sliced filters together with 10 mL of a one-phase solvent mixture (dichloromethane/methanol/deionized water (1:2:0.8 v/v/v)). This was then subjected to an ultrasonic treatment for three minutes and stored overnight in the refrigerator, afterwards we filtered the extracts through a sinter funnel into a separatory funnel, washed once with a the one-phase solvent mixture (10 mL), once with dichloromethane (5 mL) and 0.73% NaCl (5 mL) (1:1 v/v), and once with 10 mL dichloromethane. The dichloromethane extracts were concentrated by rotary evaporation under a nitrogen atmosphere and kept at -20 °C until measurements were made. To prepare the lipid extracts for analysis, the dichloromethane extracts were evaporated to dryness under nitrogen flow and then dissolved in 20 µL dichloromethane prior to analysis.</p> <p>Lipid classes were separated on Chromarods SIII and quantified with external calibration using a mixture of standard lipids by a thin-layer chromatograph-flame ionization detector (TLC-FID) Iatroscan Mark-VI (Iatron), using a hydrogen flow of 160 mL min<sup>-1</sup> and an air flow of 2000 mL min<sup>-1</sup>. This method identify eighteen lipid classes: hydrocarbons (HC), steryl esters (SE), fatty acid methyl esters (ME), fatty ketone (KET), triacylglycerols (TG), free fatty acids (FFA), fatty alcohols (ALC), 1,3-diacylglycerols (1,3DG), sterols (ST), 1,2-diacylglycerols (1,2DG), pigments (PIG), monoacylglycerols (MG), three glycolipids (GL) including monogalactosyl-, digalactosyl-, and sulfoquinovosyl- diacylglycerol (MGDG, DGDG, and SQDG, respectively), and three phospholipids (PL) (phosphatidylglycerols (PG), phosphatidylethanolamines (PE), and phosphatidylcholines (PC)). Total lipid concentration is calculated by summing all detected classes. Full details can be found in Gašparović et al. (2015; 2017). In this article we focused on lipid degradation indices trough the lipolysis index (Goutx et al., 2003), which characterize the degree of lipid degradation in seawater. Lipolysis index is calculated as the ratio of the sum of lipid degradation indices (ALC+FFA+MG+DG) to the sum of cell lipids TG, WE, and glyco- and phospho-lipids (Goutx et al., 2003).</p>
Supplementary materials for: Use and detection of a vitamin B1 degradation product yields new views of the marine B1 cycle and plankton metabolite exchange
<p>Vitamin B1 (thiamin) is a vital nutrient for most cells in nature including marine plankton. Early and recent experiments show that B1 degradation products instead of B1 can support the growth of marine bacterioplankton and phytoplankton. However, the use and occurrence of some degradation products remain uninvestigated – namely N-formyl-4-amino-5-aminomethyl-2-methylpyrimidine (FAMP) – which has been a focus of plant oxidative stress research. We investigated the relevance of FAMP in the ocean. Experiments and global ocean meta-omic data indicate that eukaryotic phytoplankton, including picoeukaryotes and harmful algal bloom species, use FAMP while bacterioplankton appear more likely to use deformylated FAMP, 4-amino-5-aminomethyl-2-methylpyrimidine (AmMP). Measurements of FAMP in seawater and biomass revealed that it occurs at picomolar concentrations in the surface ocean, heterotrophic bacterial cultures produce FAMP in the dark – indicating non-photodegradation of B1 by cells, and B1-requiring (auxotrophic) picoeukaryotic phytoplankton produce intracellular FAMP. Our results require an expansion of thinking about vitamin degradation in the sea, but also the marine B1 cycle – where it is now crucial to consider a new B1-related compound pool (FAMP) – as well as generation (dark degradation – likely via oxidation), turnover (plankton uptake), and exchange of the compound within networks of plankton.</p>
Data for: Antibiotic-degrading resistance changes bacterial community structure via species-specific responses
<p>Some bacterial resistance mechanisms degrade antibiotics, potentially protecting neighbouring susceptible cells from antibiotic exposure. We do not yet understand how such effects influence bacterial communities of more than two species, which are typical in nature. Here, we used experimental multispecies communities to test the effects of clinically important pOXA-48-plasmid-encoded resistance on community-level responses to antibiotics. We found that resistance in one community member reduced antibiotic inhibition of other species, but some benefitted more than others. Further experiments with supernatants and pure-culture growth assays showed the susceptible species profiting most from detoxification were those that grew best at degraded antibiotic concentrations (greater than zero, but lower than the starting concentration). This pattern was also observed on agar surfaces, and the same species also showed relatively high survival compared to most other species during the initial high-antibiotic phase. By contrast, we found no evidence of a role for higher-order interactions or horizontal plasmid transfer in community-level responses to detoxification in our experimental communities. Our findings suggest carriage of an antibiotic-degrading resistance mechanism by one species can drastically alter community-level responses to antibiotics, and the identities of the species that profit most from antibiotic detoxification are predicted by their intrinsic ability to survive and grow at changing antibiotic concentrations.</p>
Carbon sequestration in degraded intermountain west rangelands, USA
<p>Rangelands are often ignored in the discussion of using management to sequester carbon but demonstrating that restoration of vast degraded rangelands might pay for itself through carbon credit markets would be a significant conservation contribution. The additional amount and cost of carbon sequestered was quantified by simulating seeding perennial grass and shrub species in sagebrush shrublands dominated by non-native annual grass and forb species (NNAGF) compared to doing nothing in a 485,623 km<sup>2</sup> Area Of Interest (AOI) centered around Nevada, USA. Using Sentinel-2 satellite imagery, NNAGF cover was mapped across the AOI to locate areas dominated by NNAGFs. Spatial state-and-transition simulation models with a carbon stock-and-flow sub-model simulated the seeding of perennial species in NNAGF-dominated sagebrush shrublands in the Columbian Plateau ecoregion (IL Ranch, Nevada), north-central Great Basin ecoregion outside the North American Monsoon (TS-Horseshoe Ranch, Nevada), and the southeastern Great Basin ecoregion within the North American monsoon (PVMH landscape, Utah). The net biome productivity (NBP) and cost per unit area of sagebrush shrublands was quantified by simulating restoration of NNAGF to perennial vegetation over a 25-year period. The unseeded PVMH landscape, IL Ranch, and TS-Horseshoe Ranch were sinks of carbon (i.e., positive NBP) at 84, 9, and 11 g C∙m-<sup>2</sup>∙yr<sup>-1</sup>, respectively. About 58% to 90% of NBP was stored in the soil. The IL Ranch required only small levels of seeding and was a small sink of C at 0.71 ± 0.65 g C∙m-<sup>2</sup>∙yr<sup>-1</sup>, whereas the additional NBP for the seeded PVMH landscape was 19.9 ± 10.6 g C∙m-<sup>2</sup>∙yr<sup>-1</sup>. When extrapolated to the AOI, the most and least carbon stored, respectively, was in Utah (136,132 metric Ton∙yr<sup>-1</sup>, cost: $287M) and the central Great Basin (3,196 metric Ton∙yr<sup>-1</sup>, cost: $23M). Positive NBP values reported here showed that carbon sequestration in sagebrush shrublands compares favorably with those of more productive systems in the USA and worldwide.</p>
Green Synthesis of Copper Oxide Nanoparticles and its Efficiency in Degradation of Rifampicin Antibiotic
<p>The datasets came from synthesizing copper oxide nanoparticles from <em>Parthenium hysterophorus </em>aqueous extract, their characterization, and application in the degradation of rifampicin antibiotic. The data is presented in images and Microsoft Office Excel data sheets.</p>
Dataset: Recruitment responses of shade-tolerant and heliophilous trees in human-degraded areas: the necessity of knowing the recruitment autecology of species for making reforestation decisions
<p>This repository contains the files associated with the following article:</p> <p>Johanna Croce, Ernesto I. Badano, Andrés Tálamo. Recruitment responses of shade-tolerant and heliophilous trees in human-degraded areas: the necessity of knowing the recruitment autecology of species for making reforestation decisions Submitted to <em>Land Degradation & Development</em>.</p> <p>The first Microsoft Excel file (Dataset 01 - Microclimate.xlsx) contains two sheets with the microclimatic data (average, maximum and minimum soil temperatures, and volumetric soil water content) measured in Cerro Chachapoyas and Cerro Fachacano. These measurements were performed on three plots of each trearment, including shrub-protected treatment with high shade, shrub-protected treatment with medium shade, sunny treatment with high herbaceous cover, sunny treatment with medium herbaceous cover and controls. The second Microsoft Excel file (Dataset 02 -Plant responses.xlsx Dataset 02 - Plant responses.xlsx) contains three sheets with the data used to estimate the seedling emergence rates, plant survival rates and net aboveground growth rates of the tree species, including <em>Anadenanthera colubrina</em> and <em>Ceiba chodatii</em> in Cerro Chachapoyas, and <em>Jacaranda mimosifolia</em> in Cerro Fachacano.</p>
Reversing the great degradation of nature through economic development
<p>We analyze past and anticipated future trends in crop yields, per capita consumption, and population to estimate agricultural land requirements globally by 2050 and 2100. Assuming "business as usual," higher-income countries are expected to show little or no net growth in cropland by the end of the century, even in the face of moderate climate change. In contrast, in lower-income countries, we project that land requirements will grow dramatically, and climate change will likely double this expansion. Although economic growth is often considered to work in opposition to conservation, accelerating economic development in lower-income countries, which would help alleviate poverty and increase standards of living, would also greatly reduce potential cropland expansion in lower-income countries, even with climate change, owing to slower population growth and improved crop yields that more than offset increased per capita consumption. Combining economic development in low-income countries with reduced consumption in high-income countries could dramatically shrink global cropland requirements by the year 2100 even with moderate climate change. Such a remarkable reduction in cropland area would have enormous benefits for both biodiversity and global climate change. </p>
Data and code for: Degradation of floodplain integrity within the contiguous United States
<p class="MsoNormal">Despite the numerous hydrological, geological, and ecological benefits produced by floodplain landscapes, floodplains continue to be degraded by human activities at a much higher rate than other landscape types. This large-scale landscape modification has been widely recognized, yet a comprehensive, national dataset quantifying the degree to which human activities are responsible for this degradation has not previously been evaluated. In this research, we analyze floodplain integrity for the contiguous United States by spatially quantifying the impact of anthropogenic stressors on almost 80,000 floodplain units. This dataset demonstrates the prevalence of human modifications through widely available geospatial datasets, which we use to quantify indicators of floodplain integrity for five essential floodplain functions of flood attenuation, groundwater storage, habitat provision, sediment regulation, and organics and solute regulation. Our results show that floodplain degradation is spatially heterogeneous and that the integrity of nearly 70% of floodplains in the United States is poor. We highlight that quantifying the integrity of spatially explicit floodplain elements can allow for restoration efforts to be targeted to the areas in most desperate need of preservation.</p>
Composition of non-volant small mammals inhabiting a degradation gradient in a lowland tropical forest in Uganda
<p><span>A study aimed at assessing the structure of rodent and shrew assemblages inhabiting a degradation gradient while considering rainfall patterns was conducted in one of the few remaining lowland tropical forests in Eastern Africa. We collected a unique dataset of 1411 rodents and shrews, representing 24 species (19 rodents, 5 shrews). The most abundant species alternated in dominance as species abundance significantly fluctuated across the study period following a degradation gradient, </span><span>While only generalist species were observed near the degraded forest edge, habitat specialists such as <em>Deomys ferrugineus, Malacomys longipes</em> and <em>Scutisorex congicus</em>, were observed in the primary forest interior suggesting<span class="gnkrckgcgsb"><span> a significant</span></span></span><span class="gnkrckgcgsb"><span> association between species and their associated habitats and habitat attributes</span></span><span>. There was also an observed correlation between rainfall patterns and species abundance. Capturing more species in adjacent fallows and along the degraded forest edge suggests that many species are able to live in degraded habitats that offer a variety of food resources. The continued pressure on forest resources, however, may lead to changes in habitat structure. This, coupled with the dependence of forest ecological functions on rainfall, which is typically not the case, may ultimately cause the local extinction of highly specialized but less adaptable species.</span></p>
Controlled radical polymerization of α-Lipoic acid: A general route to degradable vinyl copolymers
<p>Here, we present the synthesis and characterization of statistical and block copolymers containing α-lipoic acid (LA) using reversible addition–fragmentation transfer (RAFT) polymerization. LA, a readily available nutritional supplement, undergoes efficient radical ring-opening copolymerization with vinyl monomers in a controlled manner with predictable molecular weights and low molar-mass dispersities. Because lipoic-acid diads present in the resulting copolymers include disulfide bonds, these copolymers efficiently and rapidly degrade when exposed to mild reducing agents such as tris(2-carboxyethyl)phosphine (<em>Mn </em>= 56 kg mol<sup>–1</sup> → 3.6 kg mol<sup>–1</sup>). This scalable and versatile polymerization method affords a facile way to synthesize degradable polymers with controlled architectures, molecular weights, and molar-mass dispersities from α-lipoic acid, a commercially available and renewable monomer.</p>
PREvention of Intrauterine Adhesion After Adhesiolysis With Novel Tri-block deGradable Polymer Film.
ClinicalTrials.gov study NCT04963179. IPD Sharing: YES. Countries: 7. Publications: 1.
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.