Microgravity Science and Technology最新文献_第10页

The Lunar One-Sixth Low Gravity Conduciveness to the Improvement of the Cold Resistance of Plants 月球六分之一低重力对植物抗寒性提高的影响

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-06-20 DOI: 10.1007/s12217-023-10058-9

Gengxin Xie, Jing Yang, Yuxuan Xu, Yuanxun Zhang, Dan Qiu, Jinghang Ding

{"title":"The Lunar One-Sixth Low Gravity Conduciveness to the Improvement of the Cold Resistance of Plants","authors":"Gengxin Xie, Jing Yang, Yuxuan Xu, Yuanxun Zhang, Dan Qiu, Jinghang Ding","doi":"10.1007/s12217-023-10058-9","DOIUrl":"10.1007/s12217-023-10058-9","url":null,"abstract":"<div><p>For humanity to complete its ambitious solar system exploration, it is crucial to comprehend how terrestrial life reacts to differing planet gravity. We followed the life trajectory of an earth cotton seed's germination, development, and ultimate fate after prolonged exposure to extremely low temperatures using the life-regeneration ecosystem carried by Chang'e 4 probe, which landed on the Moon on January 3rd, 2019, for the first time in human history. In a controlled environment with similar characteristics, such as temperature, humidity, air pressure, and nutrition, we compared this life trajectory on the moon to that on Earth, except for the differences in gravity, light, and radiation. We discovered that the 1/6 g moon gravity speeds up seed germination. Surprisingly, Moon seed-lings demonstrated rapid acclimatization to super-freezing (below minus 52 degrees Celsius) under 1/6 g lunar gravity, maintaining upright and green despite exposure to long-term extremely cold temperatures for 18–24 hours. Based on cellular and molecular reactions caused by moon-low gravity, we suggest probable mechanisms for cold resilience. These unique findings will enhance our understanding of how plants adapt to suboptimal environmental conditions in space.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-023-10058-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4795027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental Study On Gravity-effect for Startup Performance of High-Temperature Sodium Heat Pipe 重力对高温钠热管启动性能影响的实验研究

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-06-17 DOI: 10.1007/s12217-023-10056-x

Zhi Hu XUE, Bang Cheng AI, Wei QU

{"title":"Experimental Study On Gravity-effect for Startup Performance of High-Temperature Sodium Heat Pipe","authors":"Zhi Hu XUE, Bang Cheng AI, Wei QU","doi":"10.1007/s12217-023-10056-x","DOIUrl":"10.1007/s12217-023-10056-x","url":null,"abstract":"<div><p>The gravity-effect plays important factor on the startup and thermal performance of high-temperature heat pipes (HTHPs). But the results of past studies are quite different and confusing our perception. In this paper, a sodium HTHP is fabricated and experimented to study the gravity-assisted, horizontal and anti-gravity three modes on the startup behaviors and quasi-steady thermal performance. The HTHP is designed to Φ25 × 410 mm, two wraps of 100 mesh screen, and filling mass of 15 g sodium. The HTHP is tested at the inclination angle of 0°, 90°, -30° and -90°. The results show that no startup failures are found during all the three operating modes and the startup time for HTHP fully starting at different inclination angle is the same as 10 min. However, the gravity-effect cannot be ignored and plays important influence on the HTHP startup. Compared with the horizontal mode, the gravity-assisted mode (90°) is beneficial for the starting more favorably and decreasing the temperature difference between the evaporator and condenser after the startup. The anti-gravity working mode has a significant adverse effect on the temperature rise-rate of the HTHP condenser and increase the temperature difference after the startup in a large step as the inclination angle changed from 0°, -30° to -90°.\u0000</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-023-10056-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4690093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of an Approach to Measure the Inner Wall Temperature of a Tubular Window for Experiments of Two-Phase Flow Heat Transfer on the China Space Station 中国空间站两相流换热实验管状窗内壁温度测量方法的研究

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-06-13 DOI: 10.1007/s12217-023-10059-8

Zhengxi Dong, Zhenrui Wang, Liping Huang, Yukuan Shen, Zhenhui He

{"title":"Development of an Approach to Measure the Inner Wall Temperature of a Tubular Window for Experiments of Two-Phase Flow Heat Transfer on the China Space Station","authors":"Zhengxi Dong, Zhenrui Wang, Liping Huang, Yukuan Shen, Zhenhui He","doi":"10.1007/s12217-023-10059-8","DOIUrl":"10.1007/s12217-023-10059-8","url":null,"abstract":"<div><p>Observation of vapor-liquid two-phase flow patterns in a tube, together with precision measurement of the inner wall temperature of the tube is a key technique for studying the heat transfer of phase change of the two-phase flow. For the experimental study of the in-tube two-phase flow and phase-change heat transfer in microgravity on the China Space Station (CSS), a platinum thin film about 40 nm in thickness is coated on the inner wall of a quartz tube, allowing for observing flow patterns of the fluid, heating the fluid passing through, and measuring the temperature of the platinum film itself. To verify that the platinum film can measure the temperature of itself while it is working as a heater simultaneously, experiment was conducted on a selected tubular window. It showed quite acceptable precision and repeatability of the temperature measurement (0.1 ℃) at a current density of less than 4kA/cm<sup>2</sup> for calibration and remained 0.2 ℃ for applied current up to 0.7A (70kA/cm<sup>2</sup>) when it worked as a heater. After the current of 0.7A was applied for about 6 h, the slope and intercept of the linear temperature-resistance relationship of the platinum film change (i.e., the room-temperature resistance increases by 2Ω). Such platinum film can be served as a thermometer after a second in-situ calibration, with a precision kept within 0.1 ℃.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-023-10059-8.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4541911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inertial Wave Beam Path in a Non-uniformly Rotating Cylinder with Sloping Ends 端部倾斜非均匀旋转圆柱体中的惯性波束路径

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-06-01 DOI: 10.1007/s12217-023-10054-z

Stanislav Subbotin, Mariya Shiryaeva

{"title":"Inertial Wave Beam Path in a Non-uniformly Rotating Cylinder with Sloping Ends","authors":"Stanislav Subbotin, Mariya Shiryaeva","doi":"10.1007/s12217-023-10054-z","DOIUrl":"10.1007/s12217-023-10054-z","url":null,"abstract":"<div><p>The features of the inertial wave beam propagation in a librating cylindrical cavity with symmetrically inclined end-walls are experimentally studied. The geometry provides the existence of two flow regimes – inertial wave attractor and the case of symmetric beam reflection that is like the closed periodic orbit in a rotating spherical shell. Despite the visual similarity, the nature of the regimes is different. The first is due to the geometric focusing of the beams into the limit cycle after a series of reflections from sloping ends, and the second with the symmetry wave path for a given frequency and cavity geometry. Although the geometry of the problem is three-dimensional, these regimes are almost two-dimensional: the closed wave trajectory is trapping near the plane of the direction of the slope gradient of the ends. Also, we study the scaling laws for the width and amplitude of the oscillating shear layers in the axial section. At large amplitudes of the librational forcing, the global azimuthal vorticity grows in a quadratic manner, which indicates the development of a nonlinear regime of inertial waves. Fourier analysis shows that a spectrum, besides the fundamental frequency, contains two sets of closely spaced subharmonic frequencies that satisfy the triadic resonance condition.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4037514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Analysis of MRNA and MiRNA Expression Profiles in dys-1 Mutants of C. Elegans After Spaceflight and Simulated Microgravity 航天和模拟微重力条件下秀丽隐杆线虫dys1突变体MRNA和MiRNA表达谱的综合分析

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-06-01 DOI: 10.1007/s12217-023-10057-w

Jiahong Jiang, Lei Zhao, Lin Guo, Yanfang Xing, Yeqing Sun, Dan Xu

{"title":"Integrated Analysis of MRNA and MiRNA Expression Profiles in dys-1 Mutants of C. Elegans After Spaceflight and Simulated Microgravity","authors":"Jiahong Jiang, Lei Zhao, Lin Guo, Yanfang Xing, Yeqing Sun, Dan Xu","doi":"10.1007/s12217-023-10057-w","DOIUrl":"10.1007/s12217-023-10057-w","url":null,"abstract":"<div><p>Dystrophin-like <i>dys-1</i> gene is expressed and required in muscle tissue, playing a vital role in gravisensing in <i>Caenorhabditis elegans (C. elegans)</i>. To date, microRNA (miRNA)-mediated epigenetic mechanism in microgravity-induced muscular atrophy remains to be elucidated. In the present study, we first analyzed mRNA and miRNA expression profiles in space-flown <i>dys-1(cx18)</i> mutants and wild type worms (wt) of <i>C. elegans</i>. The results showed that spaceflight and microgravity have fewer effects on mRNA and miRNA expression in <i>dys-1</i> mutant than in wt worms. mRNA and miRNA expression patterns of <i>dys-1</i> mutants were changed by microgravity. Hierarchical clustering analysis showed that the alterations of genes function on neuromuscular system under space environment. Seven miRNAs (cel-miR-52, 56, 81, 82, 84, 124 and 230) have 18 significant anti-correlated target genes under space environment. RT-qPCR analysis confirmed that miR-52 and <i>cdh-3</i>, miR-84 and <i>lin-14</i>, miR-124 and <i>mgl-3</i> in <i>dys-1</i> mutants reversely altered under microgravity environment and in simulated microgravity experiment. Locomotion ability was only reduced in F0 wt worms but not in <i>dys-1</i> mutants as well as their F1 offspring after simulated microgravity. We observed expression alterations of 7 neuromuscular genes (<i>unc-27, nlp-22, flp-1, egl-5, flp-4, mgl-3, unc-94</i>) in F0 wt worms, which might be involved in the regulation of locomotion ability of <i>C. elegans.</i> This study provides important insights to reveal the mechanism in the pathogenesis of muscular atrophy induced by microgravity.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4037508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stability and Bifurcation Analysis of Two-Immiscible Liquids Film Down an Inclined Slippery Solid Substrate 两不混相液体膜沿倾斜光滑固体基底的稳定性及分岔分析

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-05-27 DOI: 10.1007/s12217-023-10048-x

Kadry Zakaria, Magdy A. Sirwah

{"title":"Stability and Bifurcation Analysis of Two-Immiscible Liquids Film Down an Inclined Slippery Solid Substrate","authors":"Kadry Zakaria, Magdy A. Sirwah","doi":"10.1007/s12217-023-10048-x","DOIUrl":"10.1007/s12217-023-10048-x","url":null,"abstract":"<div><p>In this work, the dynamic behavior of linear and nonlinear waves propagating at the separating surface between two thin layers of viscous Newtonian fluids is studied in the presence of the effect of insoluble surface surfactant. The two liquids are confined between two infinite rigid parallel plates and assumed to have different densities and viscosities. The equations of evolution for surface-wave elevation and concentration of surfactant are derived using the lubrication approximation. In the linear stage, by utilizing the normal mode approach, we have derived the dispersion relation that relates the wave angular frequency to the wave number and other parameters that is solved numerically to inspect the influences of some selected parameters on the stability criteria of the fluid flow. Also, analytical expressions for the growth rate as well as its maximum value with corresponding wave number are obtained in the special case of long-wave limiting. It is concluded that the Marangoni number <span>(text {Ma})</span> has acquired a significant stabilizing influence on the fluid flow, whereas the inverse of the slippery length of substrate plate <span>(beta)</span>, resorts to the destabilize the motion of the interfacial waves. Consequently, both of the Marangoni number and the substrate slippy coefficient can be utilized to control the film flow regime, where they preserve the film laminar flow and tend to prevent the film breakdown. These can be useful in many industrial applications such as coating processes, heat exchangers, cooling microelectronic devices, chemical reactors, food processing, thermal protection design of combustion chambers in rocket engines and operation of Laser cutting and heavy casting production processes.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12217-023-10048-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5054447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peculiarities of Surfactant Extraction by a Droplet from its Homogeneous Solution 液滴从均相溶液中萃取表面活性剂的特性

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-05-26 DOI: 10.1007/s12217-023-10051-2

M. O. Denisova, K. G. Kostarev

引用次数: 0

Development of an Experimental Device for the Assessment of Emulsions Dynamic Behavior and Stability in Micro-gravity 微重力条件下乳剂动态特性及稳定性评价实验装置的研制

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-05-25 DOI: 10.1007/s12217-023-10055-y

Angeliki P. Chondrou, Sotiris P. Evgenidis, Konstantinos A. Zacharias, Margaritis Kostoglou, Thodoris D. Karapantsios

{"title":"Development of an Experimental Device for the Assessment of Emulsions Dynamic Behavior and Stability in Micro-gravity","authors":"Angeliki P. Chondrou, Sotiris P. Evgenidis, Konstantinos A. Zacharias, Margaritis Kostoglou, Thodoris D. Karapantsios","doi":"10.1007/s12217-023-10055-y","DOIUrl":"10.1007/s12217-023-10055-y","url":null,"abstract":"<div><p>Emulsions are encountered in foods, cosmetics and pharmaceuticals. Their stability depends strongly on gravity (creaming or sedimentation) and interface driven destabilization mechanisms (coalescence or aggregation) occurring after their production. Although of great significance, coalescence and aggregation cannot be studied in-depth on ground due to coupling with gravity driven mechanisms. To overcome this restriction, the design, development and preliminary testing of a new experimental device to be used in the forthcoming ESA parabolic flights for the evaluation of emulsion dynamic behavior and stability under low gravity conditions, is presented. Such conditions allow to get rid of creaming and sedimentation and, thus, to isolate droplets coalescence and aggregation. A novel miniature emulsification cell, along with advanced electrical and optical diagnostics to produce and investigate emulsions are incorporated to custom experimental cells. Optical diagnostics include a high speed camera (up to 750.000 fps) to monitor droplets breakup and droplet-droplet interactions and a high resolution DSLR camera (20MP) to determine droplet size distribution. The EU patented I-VED electrical impedance spectroscopy technique (<i>EP 3 005 942 A1, 2016</i>) is employed to monitor the evolution of oil volumetric fraction as a function of time and gravity. Experimental parameters under study include: oil volume fraction, surfactant concentration, pulsation duration and stroke frequency for emulsification. The implementation of the experimental device, including two racks and one baseplate, complies with ESA technical requirements and safety regulations, while a number of experiments on-ground with a conventional oil-in-water emulsion validates it from a technical and functional point of view.</p></div>","PeriodicalId":707,"journal":{"name":"Microgravity Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4979557","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Viscous Effect on the Frequency Shift of an Oscillating-Rotating Droplet 粘滞对振荡旋转液滴频移的影响

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-05-19 DOI: 10.1007/s12217-023-10052-1

Lin Feng, Wan-Yuan Shi

引用次数: 0

Numerical Modelling for the Droplets Formation in Microfluidics - A Review 微流体中液滴形成的数值模拟研究进展

IF 1.8 4区工程技术

Microgravity Science and Technology Pub Date : 2023-05-16 DOI: 10.1007/s12217-023-10053-0

Liangyu Wu, Jian Qian, Xuyun Liu, Suchen Wu, Cheng Yu, Xiangdong Liu

引用次数: 0