Showing 5,021 - 5,040 results of 5,100 for search '"cryogenics"', query time: 0.15s Refine Results
  1. 5021

    Multifunctional Molecular Magnets: Magnetocaloric Effect in Octacyanometallates by Magdalena Fitta, Robert Pełka, Piotr Konieczny, Maria Bałanda

    Published 2018-12-01
    “…These values revealed that this molecular material may be treated as a possible candidate for cryogenic magnetic cooling. Values obtained for ferrimagnetic polymers at temperatures close to their magnetic ordering temperatures, Tc, were lower, i.e., −ΔSm = 6.83 J·K−1 mol−1 (ΔTad = 1.42 K) and −ΔSm = 4.9 J·K−1 mol−1 (ΔTad = 2 K) for {[MnII(pyrazole)4]2[NbIV(CN)8]·4H2O}n and{[FeII(pyrazole)4]2[NbIV(CN)8]·4H2O}n, respectively. …”
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    Article
  2. 5022

    Ecohydrological travel times derived from in situ stable water isotope measurements in trees during a semi-controlled pot experiment by D. Mennekes, D. Mennekes, M. Rinderer, S. Seeger, N. Orlowski

    Published 2021-08-01
    “…Additional destructive sampling of soil and plant material allowed for a comparison between destructive (cryogenic vacuum extraction and direct water vapor equilibration) and in situ isotope measurements. …”
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    Article
  3. 5023
  4. 5024

    Accuracy and precision of <sup>14</sup>C-based source apportionment of organic and elemental carbon in aerosols using the Swiss_4S protocol by G. O. Mouteva, S. M. Fahrni, G. M. Santos, J. T. Randerson, Y.-L. Zhang, S. Szidat, C. I. Czimczik

    Published 2015-09-01
    “…On average, 91 % of the evolving CO<sub>2</sub> was then cryogenically trapped on the vacuum line, reduced to filamentous graphite, and measured for its <sup>14</sup>C content via accelerator mass spectrometry (AMS). …”
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    Article
  5. 5025
  6. 5026

    SREDNEKEDROVAYA PALEOSEISMODISLOCATION IN THE BAIKAL RIDGE: ITS STRUCTURE AND THROWS ESTIMATED FROM GROUND‐PENETRATING RADAR DATA by O. V. Lunina, A. S. Gladkov, A. A. Gladkov, I. A. Denisenko

    Published 2018-07-01
    “…It should be noted, however, that in the studied near‐surface layer of the crust, the blocks of loose material may move along the flat planes due to gravitational sliding that increases under the impact of cryogenic processes on the steep slopes of the Baikal ridge.…”
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    Article
  7. 5027

    On the Feasibility of Rovibrational Laser Cooling of Radioactive RaF<sup>+</sup> and RaH<sup>+</sup> Cations by Timur A. Isaev, Shane G. Wilkins, Michail Athanasakis-Kaklamanakis

    Published 2021-11-01
    “…Due to the highly diagonal nature between the ionic ground state and states in the neutral system, any reduction of the internal temperature of the molecular ions would largely persist through charge-exchange without requiring the use of cryogenic buffer gas cooling. Quasirelativistic X2C and scalar-relativistic ECP calculations were performed to calculate the transition energies to excited electronic states and to study the nature of chemical bonding for both RaF<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>+</mo></msup></semantics></math></inline-formula> and RaH<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><msup><mrow></mrow><mo>+</mo></msup></semantics></math></inline-formula>. …”
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    Article
  8. 5028

    A new set-up for simultaneous high-precision measurements of CO<sub>2</sub>, <i>δ</i><sup>13</sup>C-CO<sub>2</sub> and <i>δ</i><sup>18</sup>O-CO<sub>2</sub> on small ice core sampl... by T. M. Jenk, M. Rubino, D. Etheridge, V. G. Ciobanu, T. Blunier

    Published 2016-08-01
    “…In our method, CO<sub>2</sub> is cryogenically and chromatographically separated from the bulk air and its isotopic composition subsequently determined by continuous flow isotope ratio mass spectrometry (IRMS). …”
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    Article
  9. 5029

    Sedimentary climatic record in the Galician Internal Basin: sediment provenance, transport time and hydrodynamics over the last 60.000 years. by Maider Plaza Morlote, Omar Benazzouz, Sara Ribeiro

    Published 2014-06-01
    “…Finally, a multidisciplinary study combining resolution scans, including geochemistry (ITRAX), physical properties (GEOTEK) and enviromagnetic properties (2G cryogenic magnetometer), has been constrained using a very robust geochronology framework. …”
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    Article
  10. 5030
  11. 5031

    Thermal control techniques for infrared imaging on nanosatellites by Shanmugasundaram Selvadurai

    Published 2024
    “…Given the inherent spatial constraints, nanosatellites equipped with high-power scientific equipment, such as infrared or cryogenic instruments requiring active cooling, necessitate well-suited thermal control systems. …”
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    Thesis-Doctor of Philosophy
  12. 5032

    Stirling pulse tube cryocoolers for space science missions by Rana, H

    Published 2021
    “…<p>Cryocoolers are compact and effective devices that provide cooling to cryogenic temperature. They serve to reduce thermal noise on focal plane assemblies in space telescopes, cool down superconducting devices, and present many other applications for a wide range of technologies. …”
    Thesis
  13. 5033

    Microstructure, mechanical properties and irradiation response of CrMnFeCoNi-(Y) high-entropy alloys by Zhang, Z

    Published 2021
    “…<p>CrMnFeCoNi, also known as the Cantor alloy, exhibits attractive mechanical properties at cryogenic temperatures and encouraging irradiation resistance. …”
    Thesis
  14. 5034

    Tracing silicate weathering processes in the permafrost-dominated Lena River watershed using lithium isotopes by Murphy, MJ, Porcelli, DR, Von Strandmann, PAE, Hirst, CA, Kutscher, L, Katchinoff, JA, Morth, C-M, Maximov, T, Andersson, PS

    Published 2018
    “…Overall, the range of Li concentrations and δ7Lidiss observed within the Lena River catchment are comparable to global rivers located in temperate and tropical regions. This suggests that cryogenic weathering features specific to permafrost regions (such as the continual exposure of fresh primary minerals due to seasonal freeze-thaw cycles, frost shattering and salt weathering), and climate (temperature and runoff), are not a dominant control on δ7Li variations. …”
    Journal article
  15. 5035

    Experimental and theoretical evaluation of the tensile properties of carbon nanotube-coated carbon fibre hybrid composites by Md. Aziz, Shazed

    Published 2013
    “…The fibre-matrix adhesion was analyzed by using SEM on cryogenically fractured surface of both types of composites. …”
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    Thesis
  16. 5036

    Performance of coolant strategies when turning hardened martensitic stainless steel using tialn coated carbide tool by Mohamed Elshwaini, Amad Elddein Issa

    Published 2017
    “…Dry, minimum quantity lubricant (MQL) and cryogenic machining are alternatives of green coolant to eliminate conventional cutting fluids. …”
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    Thesis
  17. 5037
  18. 5038

    Short-lived brominated hydrocarbons – observations in the source regions and the tropical tropopause layer by S. Brinckmann, A. Engel, H. Bönisch, B. Quack, E. Atlas

    Published 2012-02-01
    “…Additional measurements were made in the tropical tropopause layer (TTL) above Teresina (Brazil, 5° S) in June 2008, using balloon-borne cryogenic whole air sampling technique. Near the level of zero clear-sky net radiative heating (LZRH) at 14.8 km about 2.25 ppt organic bromine was bound to the five short-lived species, making up 13% of total organic bromine (17.82 ppt). …”
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    Article
  19. 5039

    Narrowband Thermal Terahertz Emission from Homoepitaxial GaAs Structures Coupled with Ti/Au Metasurface by Ignas Grigelionis, Vladislovas Čižas, Mindaugas Karaliūnas, Vytautas Jakštas, Kȩstutis Ikamas, Andrzej Urbanowicz, Marius Treideris, Andrius Bičiūnas, Domas Jokubauskis, Renata Butkutė, Linas Minkevičius

    Published 2023-05-01
    “…The MP resonance quality factors obtained at elevated temperatures (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>Q</mi><mo>≈</mo><mn>3.3</mn><mspace width="4.pt"></mspace><mi>to</mi><mspace width="4.pt"></mspace><mn>5.2</mn></mrow></semantics></math></inline-formula>) are very similar to those of MIM structures as well as to 2D plasmon resonance quality at cryogenic temperatures.…”
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    Article
  20. 5040

    Breast Cancer Cryoablation: Assessment of the Impact of Fundamental Procedural Variables in an In Vitro Human Breast Cancer Model by Kristi K Snyder, Robert G Van Buskirk, John G Baust, John M Baust

    Published 2020-11-01
    “…As such, in this study, we investigated the level of cell death at various temperatures associated with the margin of a cryogenic lesion as well as the impact of repetitive freezing and thawing methods on overall efficacy. …”
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    Article