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283 results for “low temperatures”
Data from: Elevated oxidative stress in pied flycatcher nestlings of eumelanic foster fathers under low rearing temperatures
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Data from: Behavioural and physiological adaptations to low-temperature environments in the common frog, Rana temporaria
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Data from: Low temperature reveals genetic variability against male-killing Spiroplasma in Drosophila melanogaster natural populations
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Record low Arctic sea ice extent in 2012 linked to two-year La Niña-driven sea surface temperature pattern
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Data from: Bird mixed-species flock formation is driven by low temperatures between and within seasons in a Subtropical Andean-foothill forest
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Shape-controlled single-crystal growth of InP at low temperatures down to 220 ℃
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Data for: Low predictability of energy balance traits and leaf temperature metrics in desert, montane, and alpine plant communities
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Full vector low-temperature magnetic measurements of geologic materials
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Low temperature selective growth of GaN single crystals on pre-patterned Si substrates_experimental dataset
<p>This file contains the raw unprocessed experimental data for the results published in Jindřich Mach et al., <strong>Low temperature selective growth of GaN single crystals on pre-patterned Si substrates</strong>, Applied Surface Science, Volume 497, 16 August 2019, 143705. </p>
Supporting Information for "How erosion influence fault segmentation and earthquakes in thrust belts: Low-temperature thermochronology and fluvial shear stress analyses on the southern Longmen Shan, eastern Tibet"
<p>Supporting Information for</p> <p>How erosion influence fault segmentation and earthquakes in thrust belts: Low-temperature thermochronology and fluvial shear stress analyses on the southern Longmen Shan, eastern Tibet</p> <p>Yijia Ye<sup>1</sup>, Xibin Tan<sup>1, </sup>*, Yiduo Liu<sup>2</sup>, Feng Shi<sup>1</sup>, Yuan-Hsi Lee<sup>3</sup>, Michael A. Murphy<sup>2</sup>, Xiwei Xu<sup>4</sup></p> <ol> <li>State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing, 100029, China</li> <li>Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX, 77204-5007, USA</li> <li>Department of Earth and Environmental Sciences, National Chung-Cheng University, Chia-Yi, 62102, Taiwan</li> <li>Institute of Crustal Dynamics, China Earthquake Administration, Beijing, 100085, China</li> </ol> <p><em>* </em>Corresponding author. E-mail address: <a href="mailto:tanxibin@sina.com">tanxibin@sina.com</a></p> <p> </p> <p><strong>Contents of this file </strong></p> <p>Figures S1 and Table S1</p>
Data from: Plasma assisted CO2 methanation: effects on the low-temperature activity of a Ni-Ce catalyst and reaction performance
Ni-Ce three-dimensional material with macropore diameter of 146.6±8.4 nm were synthesized and used for methanation catalyst. Firstly, H2-reduction of catalyst was conducted in thermal fixed bed and plasma reactor respectively, then X-ray diffraction (XRD) and CO2 Temperature Programmed Desorption (TPD) experiments on the two reduced samples were carried out to reveal the plasma effect on catalyst's physicochemical properties. It was found that plasma reduction created more abundant basic sites for CO2 adsorption, especially the medium basic sites were even doubled compared with the thermal reduced catalysts. The plasma reduced catalyst exhibited excellent low-temperature activity, ca. 50~60 oC lower than the thermal catalyst (the maximum CO2 conversion point). Based on the optimum reduced catalyst, plasma effect in the reactor level was further investigated under high gas hour space velocity (GHSV) ~50000 h-1. The plasma reactor showed higher CO2 conversion capacity and efficiency than the thermal reactor.
Data from: Behavioral classification of low frequency acceleration and temperature data from a free ranging small mammal
1. The miniaturization and affordability of new technology is driving a biologging revolution in wildlife ecology with use of animal-borne data logging devices. Among many new biologging technologies, accelerometers are emerging as key tools for continuously recording animal behavior. Yet a critical, but under-acknowledged consideration in biologging is the trade-off between sampling rate and sampling duration, created by battery- (or memory-) related sampling constraints. This is especially acute among small animals, causing most researchers to sample at high rates for very limited durations.Here, we show that high accuracy in behavioral classification is achievable when pairing low frequency acceleration recordings with temperature. 2. We conducted 84 hours of direct behavioral observations on 67 free-ranging red squirrels (200-300 g) that were fitted with accelerometers (2 g) recording tri-axial acceleration and temperature at 1 Hz. We then used a random forest algorithm and a manually-created decision tree, with variable sampling window lengths, to associate observed behavior with logger recorded acceleration and temperature. Finally, we assessed the accuracy of these different classifications using an additional 60 hours of behavioral observations, not used in the initial classification. 3. The accuracy of the manually-created decision tree classification using observational data varied from 70.6% to 91.6% depending on the complexity of the tree, with increasing accuracy as complexity decreased. Short duration behavior like running had lower accuracy than long duration behavior like feeding. The random forest algorithm offered similarly high overall accuracy, but the manual decision tree afforded the flexibility to create a hierarchical tree, and to adjust sampling window length for behavioral states with varying durations. 4. Low frequency biologging of acceleration and temperature allows accurate behavioral classification of small animals over multi-month sampling durations. Nevertheless, low sampling rates impose several important limitations, especially related to assessing the classification accuracy of short duration behavior.
Data from: Enhanced low-temperature NH3-SCR performance of Ce/TiO2 modified by Ho catalyst
Holmium was used as a dopant to boost the low-temperature NH3-SCR performance of Ce/TiO2 catalyst. It was ascertained that certain amount Ho-doping species could exceedingly improve the low-temperature SCR activity under 60,000 h-1 of Ce/TiO2, accompanied with the improvement of tolerance to H2O and SO2 at 200 ℃. Characterization results manifested that Ho modification could not only result in inhibiting the growth of TiO2 crystals and the enlargement of surface specific area but also lead to the enhanced redox ability and the increased amount of surface adsorbed substances, all of which could promote the low-temperature NH3-SCR performance of Ce/TiO2.
Denitrification performance of pseudomonas fluorescens Z03 immobilized by GO modified PVA-SA gel bead at low temperature
<p>Experimental data monitoring results.</p>
Data from: Sulfur resistance of Ce-Mn/TiO2 catalysts for low-temperature NH3–SCR
Ce-Mn/TiO2 catalyst prepared using a simple impregnation method demonstrated a better low-temperature selective catalytic reduction of NO with NH3 (NH3-SCR) activity in comparison with the sol-gel method. The Ce-Mn/TiO2 catalyst loading with 20% Ce had the best low-temperature activity and achieved a NO conversion rate higher than 90% at 140-260°C with a 99.7% NO conversion rate at 180 °C. The Ce-Mn/TiO2 catalyst only had a 6% NO conversion rate decrease after 100 ppm of SO2 was added to the stream. When the SO2 was removed from the stream, the catalyst was able to recover completely. The crystal structure, morphology, textural properties, and valence state of the metals involving the novel catalysts were investigated using X-ray diffraction (XRD), N2 adsorption and desorption analysis, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS), respectively. The decrease of NH3-SCR performance in the presence of 100 ppm SO2 was due to the decrease of the surface area, change of the pore structure, the decrease of Ce4+ and Mn4+ concentration, and the formation of the sulfur phase chemicals which blocked the active sites and changed the valence status of the elements.
Data from: Continuous high and low temperature induced a decrease of photosynthetic activity and changes in the diurnal fluctuations of organic acids in Opuntia streptacantha
Opuntia plants grow naturally in areas where temperatures are extreme and highly variable in the day during the entire year. These plants survive through different adaptations to respond to adverse environmental conditions. Despite this capability, it is unknown how CAM photosynthetic activity and growth in Opuntia plantlets is affected by constant heat or cold. Therefore, the main objective of this research was to evaluate the short-term effect of high (40°C) and low (4°C) continuous temperatures on the photosynthetic efficiency, the organic acid content (malic acid) and the relative growth rate (RGR) in seven-month-old Opuntia streptacantha plantlets during 5, 10, and 15 days. Chlorophyll fluorescence analysis allowed us to determine that high temperatures negatively impact the photosynthetic efficiency of O. streptacantha plantlets, which exhibited the lowest values of maximum quantum efficiency of the photosystem II (Fv/Fm = 52%, Fv/F0 = 85%), operational quantum yield of PS (ΦPSII = 65%) and relative electron transport rate (rETR = 65%), as well as highest values of basal fluorescence (F0 = 226%) during 15 days of treatment. Similarly, low temperatures decreased Fv/Fm (16%), Fv/F0 (50%), ΦPSII and rETR (16%). High temperatures also decreased nocturnal acidification in approximately 34–50%, whereas low temperatures increased it by 30–36%. Additionally, both continuous temperatures affected drastically diurnal consumption of malic acid, which was related to a significant RGR inhibition, where the specific photosynthetic structure area component was the most affected. Our results allowed determining that, despite the high tolerance to extreme temperatures described for Opuntia plants, young individuals of O. streptacantha suffered photosynthetic impairment that led to the inhibition of their growth. Thus, the main findings reported in this study can help to predict the potential impact of climatic change on the establishment and survival of succulent species of arid and semiarid regions of Mexico.
POSSIBILITIES OF OBTAINING SPECTACULAR BINDING MATERIAL AT LOW TEMPERATURE.
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Chalcohalide Antiperovskite Thin Films with Visible Light Absorption and High Charge-Carrier Mobility Processed by Solvent-Free and Low-Temperature Methods
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Data for the paper: Increasing the flexibility and feasibility of CSP by the addition of a low temperature energy storage system
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Microwave spectroscopy of the low-temperature skyrmion state in Cu2OSeO3
<p>This data set is used for the figures published in Phys. Rev. Lett <strong>126</strong>, 017202 (2021).</p>
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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.