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119 results for “chemical composition”
Chemical compositions data for "Space weathering of the Chang'e-5 lunar sample from a mid-high latitude region on the Moon"
<p>Data for “Space weathering of the Chang’e-5 lunar sample from a mid-high latitude region on the Moon”</p>
Chemical and Cl isotopic composition data for "Extremely Large Cl Isotopic Fractionation in Chang'e-5 Impact Glass Beads"
<p>Data for "Extremely Large Cl Isotopic Fractionation in Chang'e-5 Impact Glass Beads".</p>
The field measured size-dependent volatility of ambient fine particles at different heating temperatures and the retrieval of aerosol chemical composition
<p>This is the data used in the paper of “Qiao, X, R., Chen, L., Ren, J, Y., et al. The field measured size-dependent volatility of ambient fine particles at different heating temperatures and the retrieval of aerosol chemical composition. Journal of Geophysical Research - Atmospheres”.</p>
Equilibrium chemical composition of impact-produced hot cloud during isentropic expansion. The initial temperature T0 is 4000 K, the initial pressure P0 is 5, 20, and 80 bar. Calculations are performed using the EQL program. Abundances of considered species are presented in molar fractions.The elemental composition of impact-produced cloud is taken as a mixture of CI chondrite, mare basalts, and ferroan anorthosite with a ratio of 1:25:25 by mass as in Berezhnoy (2013).
<p>Considered species include ions, neutral gas-phase species, and condensates. Ions are written as ...(+) (for example, Al(+)). Condensates (solids and liquids) are written as ...(c) or ...(c;...). Examples of condensates are Al2O3(c) and Al2O3(c; gamma). For species marked in theirs names as (cr, l) in Gurvich et al. (1989) (for example, Al2O3(cr, l)) it is possible to determine a state of matter (liquid or solid). The content of studied species is 0 if the relative molar fraction is less than 1e-21. </p> <p>The elemental composition of impact-produced cloud is taken as a mixture of CI chondrite, mare basalts, and ferroan anorthosite with a ratio of 1:25:25 by mass as in Berezhnoy (2013). </p> <p>Calculations of the equilibrium chemical composition of impact-produced clouds were performed starting from an initial temperature of 4000 K at different initial pressures of 5, 20, and 80 bar, corresponding to entropies equal to 7.2, 5.56, and 4.25 kJ / (kg×K), respectively. </p> <p>Berezhnoy, A.A., 2013. Chemistry of impact events on the Moon. Icarus 226, 205-211.</p> <p>Gurvich L.V., Veitz I.V. et al. Thermodynamic properties of individual substances. Fourth edition in 5 volumes. Hemisphere Pub Co. New York-London, 1989.</p>
Chemical composition data of sedimentary rocks from the Permian-Triassic boundary and Cretaceous oceanic anoxic events
<p>Bulk chemical composition data of sedimentary rocks from the Permian-Triassic boundary and Cretaceous oceanic anoxic events. This is a supplementary dataset for “Geochemical variations in sedimentary records of oxygen-depleted marine environments in representative geological periods: New perspectives from a multivariate statistical technique” by Moei Yano et al.</p>
Measurement report: The variation properties of aerosol hygroscopic growth related to chemical composition during new particle formation days in a coastal city of southeast China
<p>The aerosol scattering hygroscopic growth factor (f(RH)), along with conventional air pollutants and meteorological parameters were simultaneously observed from February to April 2022 in Xiamen, a coastal city of southeast China.</p>
Behavioral and chemical composition data for: Maternal and personal information mediates the use of social cues about predation risk
<p></p><p>Organisms can gain information about predation risks from their parents, their own personal experience, and their conspecifics and adjust their behavior to alleviate these risks. These different sources of information can, however, provide conflicting information due to spatial and temporal variation of the environment. This raises the question of how these cues are integrated to produce adaptive antipredator behavior. We investigated how common lizards (Zootoca vivipara) adjust the use of conspecific cues about predation risk depending on whether the information is maternally or personally acquired. We experimentally manipulated the presence of predator scent in gestating mothers and their offspring in a full-crossed design. We then tested the consequences for social information use by monitoring offspring social response to conspecifics previously exposed to predator cues or not. Lizards were more attracted to the scent of conspecifics having experienced predation cues when they had themselves no personal information about predation risk. In contrast, they were more repulsed by conspecific scent when they had personally obtained information about predation risk. However, the addition of maternal information about predation risk canceled out this interactive effect between personal and social information: lizards were slightly more attracted to conspecific scent when these two sources of information about predation risk were in agreement. A chemical analysis of lizard scent revealed that exposure to predator cues modified the chemical composition of lizard scents, a change that might underlie lizards' use of social information. Our results highlight the importance of considering multiple sources of information while studying antipredator defenses.</p><p></p>
Long-term snow chemical composition monitoring - Ariebreen glacier (Hornsund) - raw data
<p>Since 2020, snow samples have been taken from the Ariebreen glacier several times a season during the accumulation season. The snow samples are collected in polyethylene sterile bags and transported to the Polish Polar Station Hornsund. After melting at room temperature, they are analysed in the chemical laboratory of the Polish Polar Station for pH, conductivity and chemical composition (major ions).<br> <br> Site Information Ariebreen - 0.5 km long glacier between Skoddefjellet and the northern part of Ariekammen, southernmost in Wedel Jarlsberg Land.</p> <p>Presented data from 2020 to 2022</p> <p>The data has not been checked, which means that it is raw data.</p> <p>Principal investigator (PI) Adam Nawrot</p>
Chemical compositions of PM1 and PM2.5 collected online at PKUERS site in Beijing during three seasons from 2016 to 2018
<p>This dataset provides the chemical composition of PM<sub>1</sub> and PM<sub>2.5 </sub>measured in urban Beijing. The sampling site is PKUERS which is located on the campus of Peking University. The dataset was collected by an online aerosol mass spectrometer covering three seasons (early autumn, winter, and spring) from 2016 to 2018.</p>
Compilation of the chemical composition data of pelagic clay around Minamitorishima Island in the western North Pacific Ocean
<p>A compilation of bulk chemical composition data of pelagic clay around Minamitorishima Island in the western North Pacific Ocean. Original data were published in the cited articles (shown in Data source column). This is a supplementary dataset for "High-dimensional chemostratigraphy of pelagic clay in western North Pacific Ocean revealed <em>via</em> unsupervised clustering approach" by Yasukawa et al.</p>
Figure data of "Variation in chemical composition and volatility of oxygenated organic aerosol in different rural, urban, and mountain environments"
<p>This dataset involves the data that is used for the figures in "Variation in chemical composition and volatility of oxygenated organic aerosol in different rural, urban, and mountain environments".</p>
High-time-resolution chemical composition and source apportionment of PM2.5 in northern Chinese cities: implications for policy
<p>Three real-time measurement campaigns were conducted in Xi’an, Shijiazhuang, and Beijing to investigate the chemical characteristics and source contributions of PM<sub>2.5</sub> and explore the formation progress of heavy pollution for policy implications. Chemeical components of PM<sub>2.5</sub> including OA, NO<sub>3</sub><sup>-</sup>, SO<sub>4</sub><sup>2-</sup>, NH<sub>4</sub><sup>+</sup>, Cl-, BC, and elements were monitored by Q-ACSM, AE33, and Xact, respectively. The results show that chemical compositions of PM<sub>2.5 </sub>in the three cities are all dominated by organic aerosol (OA) and nitrate (NO<sub>3</sub><sup>-</sup>). And results of source apportionment analyzed by the hybrid environmental receptor model (HERM) show that the secondary nitrate plus sulfate contributed higher to PM<sub>2.5</sub> compared to other primary sources. Morevoer, the potential formation mechanisms of secondary aerosol in three cities were further explored by establishing the correlations between secondary nitrate plus sulfate and aerosol liquid water content (ALWC), and O<em><sub>x</sub></em> (O<sub>3</sub> + NO<sub>2</sub>). The results show that photochemical oxidation and aqueous-phase reaction were two important pathways of secondary aerosol fromation. Additionally, this study compared the changes in chemical composition and source contributions of PM<sub>2.5</sub> in past decades, and suggested that not only the activities of clean energy replacements for the rural household is urgently enhanced to reduce the primary source emissions in northern China, but also collaborative control ozone and particulate matter need to be contiouslty promoted to weaken the atmosphere oxidation capacity for reducing secondary aerosol formation.</p>
Fig. 1 in Comprehensive evaluation of Bletilla striata and its substitutes by combining phenotypic characteristic, chemical composition, and anti-melanogenic activity
Fig. 1. Plant morphological characteristics of B. striata (A1 aerial part, A2 pseudobulb), B. ochracea (B1 aerial part, B2 pseudobulb) and B. formosana (C1 aerial part, C2 pseudobulb).
Fig. 3 in Comprehensive evaluation of Bletilla striata and its substitutes by combining phenotypic characteristic, chemical composition, and anti-melanogenic activity
Fig. 3. UPLC chromatographic fingerprints of 27 Bletillae Rhizoma samples (S1–S27) and the reference fingerprint (R). The peaks marked with 1–19 represent the 19 common peaks.
Fig. 2 in Comprehensive evaluation of Bletilla striata and its substitutes by combining phenotypic characteristic, chemical composition, and anti-melanogenic activity
Fig. 2. Microscopic characteristics of B. striata (A), B. ochracea (B), and B. formosana (C). (1.Epidermal cell 2. Raphid of calcium oxalate 3. Mucilage cell 4. Vessel 5. Fiber 6. Starch granule).
Fig. 9 in Comprehensive evaluation of Bletilla striata and its substitutes by combining phenotypic characteristic, chemical composition, and anti-melanogenic activity
Fig. 9. The docking complex of two compounds with tyrosinase and adenylate cyclase. (A) Coelonin in active pocket site of tyrosinase. (B) Batatasin III in an active pocket site of adenylate cyclase. (C) Coelonin formed 2 hydrogen bonds with the amino acid residues of tyrosinase. (D) Batatasin III formed 2 hydrogen bonds with the amino acid residues of adenylate cyclase.
Fig. 8 in Comprehensive evaluation of Bletilla striata and its substitutes by combining phenotypic characteristic, chemical composition, and anti-melanogenic activity
Fig. 8. Total optical density of melanin(A) and anti-melanogenic effect(B) comparison of Control, Winona, B. striata (SR), B. formosana (FS), and B. ochracea (OS). Values given are the means ± SD (n = 30). *P <0.05, ***P <0.001 versus control group.
Comparison of Acidity and Chemical Composition of Summertime Cloud Water and Aerosol at an Alpine Site in Northwest China: Implication for Elevated pH of Cloud
<p>Low molecular weight organic acids and water-soluble ion data of Cloud water and PM2.5 samples in Mt. Hua</p>
WALL-E/Vocus AIM data: Online particle phase chemical composition
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Effects of seed morphology and elaiosome chemical composition on attractiveness of five Trillium species to seed-dispersing ants
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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.