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178 results for “seawater”
Stable isotope composition (d18O) of seawater from stations in the Palmer LTER Study Site
The west Antarctic Peninsula (WAP) is a region of marked climatic variability, exhibiting strong changes in sea ice extent, retreat of the majority of its glaciers, and shifts in the amount and form of precipitation. These changes can have significant impacts on the oceanic freshwater budget and marine biogeochemical processes; it is thus important to ascertain the relative balance of the drivers, and the spatial scales over which they operate. We present a new 7-year summer-season (October to March; 2011 to 2018) series of oxygen isotopes in seawater (δ18O), augmented with some winter sampling, collected adjacent to Anvers Island at the WAP. These data are used to attribute oceanic freshwater changes to sea ice and meteoric sources, and to deduce information on the spatial scales over which the changes are driven. Sea ice melt shows strong seasonality (~9% range) and marked interannual changes, with pronounced maxima in seasons 2013/14 and 2016/17. Both of these extrema are driven by anomalous winds, but reflect strongly contrasting dynamic and thermodynamic sea ice responses. Meteoric water also shows marked seasonality (~7% range), with interannual variability reflecting changes in the input of accumulated precipitation and glacial melt to the ocean. Unlike sea ice melt, meteoric water extremes are especially pronounced in thin (<10m) surface layers close to Marr Ice Piedmont, associated with enhanced ocean stratification. Isotopic tracers help to deconvolve the complex spatio-temporal scales inherent in the coastal freshwater budget, and hence improve knowledge of the separate and cumulative physical and ecological impacts.
Engineering properties of Seawater-mixed LWAC
<p>The following files consists of data from the original article "Seawater-Mixed Lightweight Aggregate Concretes with Dune Sand, Waste Glass and Nanosilica: Experimental and Life Cycle Analysis" published in International Journal of Concrete Structures and Materials. The files are sequenced in the order of appearance of data from the article. <br>The worksheets in the uploaded file consists of data from the tests consistency, oven-dry density, thermal conductivity, open porosity, water absorption coefficient, and strength (2, 7, and 28 days) conducted on seawater-mixed light weight concretes. Also, the particle size distribution data of the raw materials used in this study is also included. The values are presented with units mentioned in appropriate locations. </p><p>Sheet 1: Particle size distribution of raw materials</p><p>Sheet 2: Slump flow data (Fresh state)</p><p>Sheet 3: Compressive strength data (@ 2, 7, and 28 days)</p><p>Sheet 4: Oven dry density data (@ 28 days)</p><p>Sheet 5: Open porosity data (@ 28 days)</p><p>Sheet 6: Thermal conductivity data (@ 28 days)</p><p>Sheet 7: Water absorption coefficient data (@ 28 days)</p><p>Link to access the published article at the source: https://link.springer.com/article/10.1186/s40069-023-00613-4</p><p>Specimen ID description: </p><p>QTW0 - CEM III with quartz sand (Tap water mixing)</p><p>QTW3 - CEM III + 3% nano-Silica with quartz sand (Tap water mixing)</p><p>QSW0 - CEM III with quart sand (Seawater mixing)</p><p>QSW3 - CEM III + 3% nano-Silica with quartz sand (Seawater mixing)</p><p>GTW0 - CEM III with crushed glass aggregate (Tap water mixing)</p><p>GTW3 - CEM III + 3% nano-Silica with crushed glass aggregate (Tap water mixing)</p><p>GSW0 - CEM III with crushed glass aggregate (Seawater mixing)</p><p>GSW3 - CEM III + 3% nano-Silica with crushed glass aggregate (Seawater mixing)</p><p>DTW0 - CEM III with dune sand (Tap water mixing)</p><p>DTW3 - CEM III + 3% nano-Silica with dune sand (Tap water mixing)</p><p>DSW0 - CEM III with dune sand (Seawater mixing)</p><p>DSW3 - CEM III + 3% nano-Silica with dune sand (Seawater mixing)</p><p> </p><p>PS - The attached file could be opened only with ORIGIN 2021b or any other compatible versions of the same software</p>
Supplementary materials of the article Mushrooms Adapted to Seawater: Two New Species of Candolleomyces (Basidiomycota, Agaricales) from China
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Song et al._Peak areas of aromatic acids and cations in seawater and SSA filter samples & Enrichment factors for aromatic acids and cations in submicron SSA
<p><a name="OLE_LINK2"></a><span>Aromatic acids are ubiquitous in seawater (SW) and can be transported to the atmosphere via sea spray aerosol (SSA). Despite their importance in affecting the global radiative balance, the contribution of marine aromatic acids and their</span><span><span> </span></span><span><span>transport mechanisms through SSA remain unclear.</span></span><span> Herein, the distribution of particle size and number concentration of SSA produced in SW containing nine different aromatic acids (i.e., benzoic acids, benzenedicarboxylic acids, hydroxybenzoic acids, vanillic acid, and syringic acid) was studied using a custom-made SSA simulation chamber; moreover, the enrichment of aromatic acids in SSA and</span><span> </span><span>their emission flux to the atmosphere were analyzed. Transmission electron microscopy (TEM) images clearly revealed that aromatic acids can be transferred to the nascent SSA. Interestingly, the morphology associated with benzenedicarboxylic acids-coated particles showed that aromatic acids can promote the growth of other surfaces of sea salt, thus making the sea salt core spherical. Aromatic acids showed a significant enrichment behavior at the air-sea interface, which clearly indicated that SSA represent a source of aromatic acids in the atmosphere. Vanillic acid had the largest global emission flux through SSA (962 tons yr<sup>-1</sup>), even though its concentration in SW<span> </span>was lower. The calculated results indicated that the global annual flux of aromatic acids was not only affected by the concentration in SW, but also by their enrichment factor (EF). These data are critical for further quantifying the contribution of organic acids to the atmosphere via SSA, which may provide an estimate of the potential influence of the atmospheric feedbacks to the ocean carbon cycle.</span></p>
Impact of CO2-rich seawater injection on the flow properties of basalts
<p>This is the dataset that was used to run the pore network simulations in the published work "Impact of CO2-rich seawater injection on the flow properties of basalts" by E. Stavropoulou, C. Griner and L. Laloui 2024 in the International Journal of Greenhouse Gas Control.</p> <p>More precisely the provided data are the segmented porosity tomographies before (pre-CO2) and after (post-CO2) exposure to CO2 for cores 05-02, 08-02 and 08-03.</p> <ul> <li>05-02-pre and -post: 58 μm/px</li> <li>08-02-pre and -post: 52 μm/px</li> <li>08-03-pre and -post: 52 μm/px</li> </ul> <p>Additional data, e.g. the scripts to run the simulations (based on openPNM) can be provided upon request.</p>
Scripts and data for the manuscript "Transcriptomic profiling of gill biopsies to define predictive markers for seawater survival in farmed Atlantic salmon"
<p>This dataset supports the manuscript titled "Transcriptomic profiling of gill biopsies to define predictive markers for seawater survival in farmed Atlantic salmon." It contains comprehensive RNA-seq count data from gill biopsies of approximately 3000 Atlantic salmon smolt, collected during the SynchroSmolt project. The data is supplemented with RNA-seq counts from two prior photoperiod smolt experiments (2013_shortdays and 2017_winterlength) and single-nucleus RNA-seq (snRNA-seq) data from an additional experiment.</p> <p><strong>Key Dataset Elements:</strong><br>- <strong>RNA-seq read counts and metadata</strong> for three experiments, detailing various growth, condition, and survival indicators.<br>- <strong>Scripts for analysis</strong> include differential expression analysis, random forest model preparation and execution, and cell-type-specific gene analysis.<br>- <strong>Intermediate data outputs</strong> such as normalized RNA-seq counts, results from differential expression analyses, and random forest model inputs and outputs.</p> <p><br>This dataset facilitates the exploration of gene expression-based predictive modeling for seawater survival, revealing key insights into the influence of photoperiod history and developmental gene regulation on Atlantic salmon's transition to seawater.</p>
Methyl bromide and methyl chloride fluxes from soil and seawater samples under different treatment
<p>Methyl bromide (CH<sub>3</sub>Br) and methyl chloride (CH<sub>3</sub>Cl) are major carriers of atmospheric bromine and chlorine, respectively, which can catalyze stratospheric ozone depletion. However, in our current understanding, there are missing sources associated with these two species. Here we investigated the effect of copper(II) on CH<sub>3</sub>Br and CH<sub>3</sub>Cl production from soil, seawater and model organic compounds: catechol (benzene-1,2-diol) and guaiacol (2-methoxyphenol). This work has been accepted to publish in Nature Communications with open access, entitled as "Application of copper(II)-based chemicals induces CH<sub>3</sub>Br and CH<sub>3</sub>Cl emissions from soil and seawater". On Zenodo, we are providing the source data for figure production.</p>
Effect of nitrate on the photochemical production of carbonyl sulfide from surface seawater under sunlight
<p>Supporting data for "Effect of nitrate on the photochemical production of carbonyl sulfide from surface seawater under sunlight". Include data used to generate figures, plots, and tables in the paper.</p>
Mercury isotopic compositions in fine particles and offshore surface seawater in a coastal area of East China: Implication for Hg sources and atmospheric transformations
<p>Original data:</p> <p>sheet 1: PHg concentration</p> <p>sheet2: Chemical components in PM2.5</p> <p>sheet3: PHg isotopes</p> <p>sheet4: Seawater Hg isotopes</p>
The mysterious oil spill in the northeastern coast of Brazil: tracking offshore seawater and the need for improved vessel facilities
<p>PAHs and aliphatics data obtained in seawater from NE Brazil</p>
Data Supporting "Effects of Microhydration on the Mechanisms of Hydrolysis and Cl- Substitution in Reactions of N2O5 and Seawater"
<p>All structures used in paper "Effects of Microhydration on the Mechanisms of Hydrolysis and Cl- Substitution in Reactions of N2O5 and Seawater". See README for more information.</p>
The dataset for the manuscript entitled "Seawater intrusion inhibits nitrate removal in tidal marsh aquifers"
<p>This is the dataset for the manuscript entitled "Seawater intrusion inhibits nitrate removal in tidal marsh aquifers".</p>
Electrodeposition of calcareous cement from seawater in marine silica sands – Data
<p>Quantitative data in support of the publication titled "Electrodeposition of calcareous cement from seawater in marine silica sands" by Andony Landivar Macias, Steven D. Jacobsen, and Alessandro F. Rotta Loria.</p>
Data from: Population characteristics of a large whale shark aggregation inferred from seawater environmental DNA
Population genetics is essential for understanding and managing marine ecosystems, but sampling remains challenging. We demonstrate that high-throughput sequencing of seawater environmental DNA can provide useful estimates of genetic diversity in a whale shark (Rhincodon typus) aggregation. We recover similar mitochondrial haplotype frequencies in seawater compared to tissue samples, reliably placing the studied aggregation in a global genetic context and expanding the applications of environmental DNA to encompass population genetics of aquatic organisms.
Using vertebrate environmental DNA from seawater in biomonitoring of marine habitats
<p>Conservation and management of marine biodiversity depends on biomonitoring of marine habitats,<br> but current approaches are resource-intensive and require different approaches for different organisms. Environmental<br> DNA (eDNA) extracted from water samples is an efficient and versatile approach to detecting aquatic<br> animals. In the ocean, eDNA composition reflects local fauna at fine spatial scales, but little is known about the<br> effectiveness of eDNA-based monitoring of marine communities at larger scales. We investigated the potential of<br> eDNA to characterize and distinguish marine communities at large spatial scales by comparing vertebrate species<br> composition among marine habitats in Qatar, the Arabian Gulf (also known as the Persian Gulf), based on eDNA<br> metabarcoding of seawater samples. We conducted species accumulation analyses to estimate how much of the<br> vertebrate diversity we detected. We obtained eDNA sequences from a diverse assemblage of marine vertebrates,<br> spanning 191 taxa in 73 families. These included rare and endangered species and covered 36% of the bony fish<br> genera previously recorded in the gulf. Sites of similar habitat type were also similar in eDNA composition. The<br> species accumulation analyses showed that the number of sample replicates was insufficient for some sampling<br> sites but suggested that a few hundred eDNA samples could potentially capture >90% of the marine vertebrate<br> diversity in the study area. Our results confirm that seawater samples contain habitat-characteristic molecular<br> signatures and that eDNA monitoring can efficiently cover vertebrate diversity at scales relevant to national and<br> regional conservation and management.</p>
Divergent responses of symbiotic and asymbiotic N2 fixation to seawater additions
<p>Sea level rise-associated seawater intrusion exerts substantial impacts on the structure and function of coastal ecosystems. As nitrogen (N) availability is closely related to the structure and function of ecosystems, it is crucial to understand how seawater intrusion impacts biological N<sub>2</sub> fixation, a major pathway of new N input to natural ecosystems.</p> <p>Here, a seawater addition experiment with two N<sub>2</sub>-fixing plant species (<i>Acacia auriculiformis</i> and <i>Casuarina equisetifolia</i>) and ten non-N<sub>2</sub>-fixing plant species was conducted to simulate sea level rise-associated seawater intrusion. The experiment included control (0 mm seawater yr<sup>-1</sup>), low seawater addition (LSW, 200 mm seawater yr<sup>-1</sup>), and high seawater addition (HSW, 400 mm seawater yr<sup>-1</sup>). </p> <p>Symbiotic N<sub>2</sub> fixation (SNF) rate of <i>A. auriculiformis</i> was significantly higher under LSW (but not for HSW) than the control. For <i>C. equisetifolia</i>, SNF rates under LSW and HSW significantly increased by 8.0 and 19.5 times, respectively, compared with the control. In contrast, asymbiotic N<sub>2</sub> fixation rates under LSW and HSW significantly decreased by 18.5% and 30.4%, respectively, across all the plant species.</p> <p>Our findings suggest that the responses of biological N<sub>2</sub> fixation to seawater intrusion are divergent either among different N<sub>2</sub>-fixing plant species or between symbiotic and asymbiotic forms, which should be considered in terrestrial ecosystem models in order to improve the prediction of N dynamics under climate changes.</p>
Data from: Distinctive microbial community and genome structure in coastal seawater from a human-made port and nearby offshore island in northern Taiwan facing the Northwestern Pacific Ocean
<p><span>Pollution in human-made fishing ports caused by petroleum </span><span>from</span><span> boats, dead fish, toxic </span><span>chemicals</span><span>, and effluent </span><span>poses</span><span> a challenge to the organisms in seawater. To decipher the impact of pollution on the microbiome, we collected surface water </span><span>from</span><span> a fishing port and a nearby offshore island in northern Taiwan facing the </span><span>Northwestern Pacific Ocean. By employing 16S </span><span>rRNA gene</span><span> amplicon sequencing and whole-genome shotgun sequencing, we discovered that </span><span>Rhodobacteraceae, Vibrionaceae, and Oceanospirillaceae emerged as the dominant species in the fishing port</span><span>,</span><span> where we found many genes harboring the functions of </span><span>antibiotic</span><span> resistance (</span><span>ansamycin, nitroimidazole, and aminocoumarin), metal tolerance (copper, chromium, iron and multimetal), virulence factors (chemotaxis, flagella, T3SS1), carbohydrate metabolism (biofilm formation and remodeling of bacterial cell </span><span>walls</span><span>), nitrogen metabolism (denitrification, N<sub>2</sub> fixation, and ammonium assimilation), and ABC transporters (phosphate, lipopolysaccharide, and branched-chain amino </span><span>acids</span><span>). The dominant bacteria at the nearby offshore island (</span><span>Alteromonadaceae, Cryomorphaceae, Flavobacteriaceae, Litoricolaceae, and Rhodobacteraceae) were partly similar to those in the South China Sea and the East China Sea. Furthermore, we inferred</span><span> that</span><span> the microbial community network of </span><span>the cooccurrence</span><span> of dominant bacteria </span><span>on the</span><span> offshore island was connected to dominant bacteria in </span><span>the </span><span>fishing port by mutual</span> <span>exclusion. By examining the assembled microbial genomes collected from the coastal seawater of the fishing port, we revealed four genomic islands containing large gene-containing sequences</span><span>,</span><span> including phage integrase, DNA</span> <span>invertase, restriction enzyme, DNA gyrase inhibitor, and antitoxin HigA-1.</span><span> In this study, </span><span>we provided </span><span>clues </span><span>for the possibility of genomic islands as the units of horizontal transfer and as the tools of microbes for facilitating adaptation in a human-made port environment.</span></p>
Seawater Nasal Wash to Relieve COVID-19 Nasal Symptoms and Reduce SARS-CoV-2 Viral Load.
ClinicalTrials.gov study NCT04916639. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Washing COVID-19 Away With a Hypertonic Seawater Nasal Irrigation Solution
ClinicalTrials.gov study NCT05729204. IPD Sharing: YES. Countries: 1. Publications: 8.
Data from: Distinctive microbial community and genome structure in coastal seawater from a human-made port and nearby offshore island in northern Taiwan facing the Northwestern Pacific Ocean
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