Gravitational and space research : publication of the American Society for Gravitational and Space Research最新文献_第5页

Self-Assembly of Protein Fibrils in Microgravity 微重力条件下蛋白原纤维的自组装

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2018-07-01 DOI: 10.2478/gsr-2018-0002

D. Bell, S. Durrance, D. Kirk, Hector Gutierrez, D. Woodard, J. Avendano, J. Sargent, Caroline Leite, Beatriz Saldana, Tucker Melles, Samantha Jackson, Shaohua Xu

{"title":"Self-Assembly of Protein Fibrils in Microgravity","authors":"D. Bell, S. Durrance, D. Kirk, Hector Gutierrez, D. Woodard, J. Avendano, J. Sargent, Caroline Leite, Beatriz Saldana, Tucker Melles, Samantha Jackson, Shaohua Xu","doi":"10.2478/gsr-2018-0002","DOIUrl":"https://doi.org/10.2478/gsr-2018-0002","url":null,"abstract":"Abstract Deposits of insoluble protein fibrils in human tissue are associated with amyloidosis and neurodegenerative diseases. Different proteins are involved in each disease; all are soluble in their native conformation in vivo, but by molecular self-assembly, they all form insoluble protein fibril deposits with a similar cross β-sheet structure. This paper reports the results of an experiment in molecular self-assembly carried out in microgravity on the International Space Station (ISS). The Self-Assembly in Biology and the Origin of Life (SABOL) experiment was designed to study the growth of lysozyme fibrils in microgravity. Lysozyme is a model protein that has been shown to replicate the aggregation processes of other amyloid proteins. Here the design and performance of the experimental hardware is described in detail. The flight experiment was carried to the ISS in the Dragon capsule of the SpaceX CRS-5 mission and returned to Earth after 32 days. The lysozyme fibrils formed in microgravity aboard the ISS show a distinctly different morphology compared to fibrils formed in the ground-control (G-C) experiment. The fibrils formed in microgravity are shorter, straighter, and thicker than those formed in the laboratory G-C experiment. For two incubation periods, (2) about 8.5 days and (3) about 14.5 days, the average ISS and G-C fibril diameters are respectively: Period 2DISS=7.5nm±31%,andDG‐C=3.4nm±31%Period 3DISS=6.2nm±33%,andDG‐C=3.6nm±33%. matrix{{Period,2} hfill & {} hfill & {{D_{ISS}} = 7.5{rm{nm}} pm 31% ,} hfill cr {} hfill & {rm and} hfill & {{D_{G - C}} = 3.4{rm{nm}} pm 31%} hfill cr {Period,3} hfill & {} hfill & {{D_{ISS}} = 6.2{rm{nm}} pm 33% ,} hfill cr {} hfill & {rm and} hfill & {{D_{G - C}} = 3.6{rm{nm}} pm 33% .}}","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77592234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Temporal RNA Integrity Analysis of Archived Spaceflight Biological Samples 存档航天生物样本的时间RNA完整性分析

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2018-05-20 DOI: 10.2478/GSR-2018-0009

E. Talburt, Alison J. French, D. K. Lopez, San-Huei Lai Polo, Valery Boyko, Marie T. Dinh, J. Rask, Helen J. Stewart, K. Chakravarty

{"title":"Temporal RNA Integrity Analysis of Archived Spaceflight Biological Samples","authors":"E. Talburt, Alison J. French, D. K. Lopez, San-Huei Lai Polo, Valery Boyko, Marie T. Dinh, J. Rask, Helen J. Stewart, K. Chakravarty","doi":"10.2478/GSR-2018-0009","DOIUrl":"https://doi.org/10.2478/GSR-2018-0009","url":null,"abstract":"Abstract In spaceflight experiments, model organisms are used to assess the effects of microgravity on specific biological systems. In many cases, only one biological system is of interest to the Principal Investigator. To maximize the scientific return of experiments, the remaining spaceflight tissue is categorized, documented, and stored in the biobank at NASA Ames Research Center, which is maintained by the Ames Life Science Data Archive (ALSDA). The purpose of this study is to evaluate the state of a sample set of tissues from the ALSDA biobank. Garnering information – such as downstream functional analysis for the generation of omics datasets – from tissues is, in part, dependent on the state of sample preservation. RNA integrity number (RIN) values have been calculated for rodent liver tissues that were part of scientific payloads returned from the International Space Station (ISS). Rat livers from Spacelab Life Sciences 1 (SLS-1) and mouse livers from Commercial Biomedical Test Module 3 (CBTM-3), Rodent Research 1 (RR1), and Rodent Research 3 (RR3) were tested. It was found that mean RIN values from CBTM-3, RR1, and RR3 were suitable for downstream functional analysis (RIN > 5) while the mean RIN value for SLS-1 was not (RIN = 2.5 ± 0.1). Information from this study lays the foundation for future efforts in determining the types of assays that are most appropriate for different tissues in the ALSDA biobank and similar preservation facilities, which would aid in shaping the design of experiments.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89425690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Einstein-Elevator: A New Facility for Research from μg to 5 g 爱因斯坦电梯:一种新的研究设备，从μg到5g

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/GSR-2017-0007

C. Lotz, Tobias Froböse, A. Wanner, L. Overmeyer, W. Ertmer

{"title":"Einstein-Elevator: A New Facility for Research from μg to 5 g","authors":"C. Lotz, Tobias Froböse, A. Wanner, L. Overmeyer, W. Ertmer","doi":"10.2478/GSR-2017-0007","DOIUrl":"https://doi.org/10.2478/GSR-2017-0007","url":null,"abstract":"Abstract Increasing efforts to move into space have driven the need for new facilities that are capable of simulating weightlessness and other space gravity conditions on Earth. Simulation of weightlessness/microgravity (approximately 10−6 g) is conducted in different earthbound and flight-based facilities, often with poor availability. Other conditions such as lunar or Martian gravity with their partial Earth gravity/hypogravity cannot be performed at a large scale for scientific research on Earth. For multiple Earth gravity/hypergravity, simulation centrifuges are available, but they do not allow the possibility of abrupt acceleration changes. To support this wide range of conditions, a new technique is being developed to combine all of these requirements into a single drop tower facility. Currently under construction, the Einstein-Elevator of the Hannover Institute of Technology at the Leibniz Universität Hannover is an earthbound tool created for simulating micro-, hypo-, and hypergravity research with a high repetition rate. The facility will be capable of performing 100 experiments per day (8-h work shift), each creating 4 s of microgravity. For the first time, statistics can be applied in experiments under space gravity conditions at favorable costs and short mission times. The Einstein-Elevator offers room for large experiments with a diameter up to 1.7 m and a height up to 2 m as well as weights up to 1,000 kg. To perform larger experiments under different gravitational conditions, it was necessary to develop an innovative drive and guide concept. The Einstein-Elevator will be available for general research under different gravity conditions from 2018 onward.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89741811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Analysis of Vibratory Data Collected by the Space Acceleration Measurement System (SAMS) on Blue Origin, June 19, 2016 Blue Origin上空间加速度测量系统(SAMS)采集的振动数据分析，2016年6月19日

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/GSR-2017-0006

K. McPherson, Eric Kelly, Jennifer Keller, Ajeeth Ibrahim, E. Wagner, K. Hrovat

{"title":"Analysis of Vibratory Data Collected by the Space Acceleration Measurement System (SAMS) on Blue Origin, June 19, 2016","authors":"K. McPherson, Eric Kelly, Jennifer Keller, Ajeeth Ibrahim, E. Wagner, K. Hrovat","doi":"10.2478/GSR-2017-0006","DOIUrl":"https://doi.org/10.2478/GSR-2017-0006","url":null,"abstract":"Abstract On Sunday, June 19, 2016, a Space Acceleration Measurement System triaxial sensor head flew on a suborbital flight aboard Blue Origin's New Shepard vehicle to collect precision vibratory accelerometry data. The Space Acceleration Measurement System (SAMS) sensor head was mounted inside of a Blue Origin single payload locker inside of the crew capsule. This paper describes the configuration, capture, and analysis of the SAMS data from this flight along with other, related flight log information provided by Blue Origin. Three overlapping periods during the flight were identified and characterized to provide future users of the platform with insight into options that may prove suitable for their research needs. Average accelerations in the Post-Separation Period were consistent with other low-g research platforms, while the shorter Microgravity Period in the middle of the flight showed ultra-quiet vibratory acceleration environments. Researchers can consider this microgravity quality versus time a tradeoff in their experimental designs.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80777078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Electrophysiological Recordings on a Sounding Rocket: Report of a First Attempt Using Xenopus laevis Oocytes 探空火箭上的电生理记录:利用非洲爪蟾卵母细胞的首次尝试报告

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/gsr-2017-0010

Simon L. Wuest, T. Plüss, Christoph Hardegger, M. Felder, A. Kunz, Benno Fleischli, Carlos Komotar, Lukas Rüdlinger, Andreas Albisser, T. Gisler, D. Frauchiger, M. Egli

{"title":"Electrophysiological Recordings on a Sounding Rocket: Report of a First Attempt Using Xenopus laevis Oocytes","authors":"Simon L. Wuest, T. Plüss, Christoph Hardegger, M. Felder, A. Kunz, Benno Fleischli, Carlos Komotar, Lukas Rüdlinger, Andreas Albisser, T. Gisler, D. Frauchiger, M. Egli","doi":"10.2478/gsr-2017-0010","DOIUrl":"https://doi.org/10.2478/gsr-2017-0010","url":null,"abstract":"Abstract It is not fully understood how cells detect external mechanical forces, but mechanosensitive ion channels play important roles in detecting and translating physical forces into biological responses (mechanotransduction). With the “OoClamp” device, we developed a tool to study electrophysiological processes, including the gating properties of ion channels under various gravity conditions. The “OoClamp” device uses an adapted patch clamp technique and is operational during parabolic flight and centrifugation up to 20 g. In the framework of the REXUS/BEXUS program, we have further developed the “OoClamp” device with the goal of conducting electrophysiological experiments aboard a flying sounding rocket. The aim of such an experiment was first to assess whether electrophysiological measurements of Xenopus laevis oocytes can be performed on sounding rocket flights, something that has never been done before. Second, we aimed to examine the gating properties of ion channels under microgravity conditions. The experiment was conducted in March 2016 on the REXUS 20 rocket. The post-flight analysis showed that all recording chambers were empty as the rocket reached the microgravity phase. A closer analysis of the flight data revealed that the oocytes were ripped apart a few seconds after the rocket launch. This first attempt at using sounding rockets as a research platform for electrophysiological recordings was therefore limited. Our modified “OoClamp” hardware was able to perform the necessary tasks for difficult electrophysiological recordings aboard a sounding rocket; however, the physical stresses during launch (acceleration and vibrations) did not support viability of Xenopus oocytes.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90753102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

MMaJIC, an Experimental Chamber for Investigating Soldering and Brazing in Microgravity MMaJIC，研究微重力下焊接和钎焊的实验室

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/GSR-2017-0008

S. Daly, Micah Hardyman, Jimmy Ragan, J. Toombs, T. Prater, R. Grugel

引用次数: 3

Detection of Microorganisms Onboard the International Space Station Using an Electronic Nose 利用电子鼻检测国际空间站上的微生物

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/GSR-2017-0013

U. Reidt, A. Helwig, G. Müller, L. Plobner, Veronika Lugmayr, S. Kharin, Yu.I. Smirnov, N. Novikova, J. Lenic, V. Fetter, T. Hummel

{"title":"Detection of Microorganisms Onboard the International Space Station Using an Electronic Nose","authors":"U. Reidt, A. Helwig, G. Müller, L. Plobner, Veronika Lugmayr, S. Kharin, Yu.I. Smirnov, N. Novikova, J. Lenic, V. Fetter, T. Hummel","doi":"10.2478/GSR-2017-0013","DOIUrl":"https://doi.org/10.2478/GSR-2017-0013","url":null,"abstract":"Abstract We report on the detection of microorganisms onboard the International Space Station (ISS) using an electronic nose we named the E-Nose. The E-Nose, containing an array of ten different metal oxide gas sensors, was trained on Earth to detect the four most abundant microorganisms that are known to exist onboard the ISS. To assess its performance in space, the E-Nose was brought to the ISS and three measurement campaigns were carried out in three different locations inside the ISS during a 5-month mission. At the end of this mission, all investigated locations were wiped with swabs, and the swabs and odor sensor signal data were sent back to Earth for an in-depth analysis in earthbound laboratories. The in-space measurements were compared with an odor database containing four organisms, but a consensus odor could not be identified. Microbiological results could not provide clues to the smell that was measured. The yeast Rhodotorula mucilaginosa was identified in the literature as the most probable candidate for the unknown odor. Further investigations showed that the smell of Rhodotorula mucilaginosa matches very well with the data obtained inside the ISS. Finally, Rhodotorula mucilaginosa DNA was identified in swabs taken from the sleeping cabin of the astronaut, which confirms the assumption that the yeast Rhodotorula mucilaginosa was actually measured in space by the E-Nose.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84222211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Hemodynamic and Neuroendocrinological Responses to Artificial Gravity 对人工重力的血液动力学和神经内分泌反应

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/GSR-2017-0012

S. Schneider, Vanja Zander, T. Vogt, V. Abeln, H. Strüder, A. Jacubowski, H. Carnahan, P. Wollseiffen

{"title":"Hemodynamic and Neuroendocrinological Responses to Artificial Gravity","authors":"S. Schneider, Vanja Zander, T. Vogt, V. Abeln, H. Strüder, A. Jacubowski, H. Carnahan, P. Wollseiffen","doi":"10.2478/GSR-2017-0012","DOIUrl":"https://doi.org/10.2478/GSR-2017-0012","url":null,"abstract":"Abstract The aim of this study was to determine the hemodynamic and neuroendocrinological responses to different levels and protocols of artificial gravity, especially in comparison to what is expected during a moderate bout of exercise. Ten male participants were exposed to artificial gravity using two different protocols: the first was a centrifugation protocol that consisted of a constant phase of 2 Gz for 30 minutes, and the second consisted of an intermittent phase of 2 Gz for two minutes, separated by resting periods for three minutes in successive order. Near infrared spectroscopy (oxyhemoglobin and deoxyhemoglobin) at the prefrontal cortex, Musculus biceps brachii, and Musculus gastrocnemius, as well as heart rate and blood pressure were recorded before, during, and after exposure to artificial gravity. In order to determine effects of artificial gravity on neuroendocrinological parameters (brain-derived neurotrophic factor, vascular endothelial growth factor, and insulin-like growth factor 1), blood samples were taken before and after centrifugation. During the application of artificial gravity the concentration of oxyhemoglobin decreased significantly and the concentration of deoxyhemoglobin increased significantly in the prefrontal cortex and the Musculus biceps brachii muscle. Participants exposed to the continuous artificial gravity profile experienced peripheral pooling of blood. No changes were observed for brain-derived neurotrophic factor, vascular endothelial growth factor, or insulin-like growth factor 1. Intermittent application of artificial gravity may represent a better-tolerated presentation for participants as hemodynamic values normalize during resting periods. During both protocols, heart rate and arterial blood pressure remained far below what is experienced during moderate physical activity.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90190304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Sensitive Period for the Development of Motor Function in Rats: A Microgravity Study 微重力下大鼠运动功能发育敏感期的研究

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/gsr-2017-0011

Shannon M. Harding, Neeraj Singh, K. Walton

{"title":"A Sensitive Period for the Development of Motor Function in Rats: A Microgravity Study","authors":"Shannon M. Harding, Neeraj Singh, K. Walton","doi":"10.2478/gsr-2017-0011","DOIUrl":"https://doi.org/10.2478/gsr-2017-0011","url":null,"abstract":"Abstract Spaceflight studies offer a unique opportunity to examine the impact of gravity on developing motor skills. Previously, we reported that young rats experiencing microgravity in low Earth orbit (LEO) beginning on postnatal day (P)14 showed impaired swimming, walking, and surface righting after returning to 1 g, with immature motor skills persisting until adulthood. Here, we report on post-flight surface righting and swimming of rats experiencing spaceflight from P7 or P8. Litters with dams were flown aboard a space shuttle Space Transportation System (STS) 9-day (NIH-R3, STS-72) or 16-day mission (Neurolab, STS-90). Flight rats from both missions showed significantly fewer mature, age-appropriate righting tactics after landing compared to ground controls. Flight rats also had a steeper body angle while floating in the water before swimming, started swimming sooner, and swam faster. The effects on surface righting persisted for the duration of behavior tests (6 days [9-day mission] or 23 days [16-day mission]), after landing. Differences in pre-swimming behavior resolved by return day (R)2, and differences in swimming speed and posture resolved by R10. These data suggest that exposure to microgravity at a young age prevents the normal development of surface righting and that the normal development of swimming can recover if animals return from LEO by P16 or P24. These findings lend additional support to the existence of a critical period of development for motor function. However, studies are needed with improved housing during spaceflight to ensure that maternal offspring behavior is not disrupted, as was observed during the Neurolab mission.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90445588","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Damping of Thermocapillary Destabilization of a Liquid Film in Zero Gravity Through the Use of an Isothermal Porous Substrate 利用等温多孔衬底抑制零重力条件下液膜的热毛细失稳

Gravitational and space research : publication of the American Society for Gravitational and Space Research Pub Date : 2017-12-01 DOI: 10.2478/gsr-2017-0009

A. Narendranath

{"title":"Damping of Thermocapillary Destabilization of a Liquid Film in Zero Gravity Through the Use of an Isothermal Porous Substrate","authors":"A. Narendranath","doi":"10.2478/gsr-2017-0009","DOIUrl":"https://doi.org/10.2478/gsr-2017-0009","url":null,"abstract":"Abstract Thin liquid films on isothermal substrates, where the film is flat and parallel to the substrate, succumb to thermocapillary instabilities and rupture, forming local hot-spots. These long wavelength instabilities are specific to aspect ratios where the liquid film mean thickness is several orders of magnitude less than the substrate characteristic dimension. Absent stabilizing gravitational acceleration, the growth rate of thermocapillary instabilities is further intensified, driving the film to rupture even earlier. Numerical simulations of zero gravity dynamics of Newtonian liquid films on a solid, horizontal, isothermal substrate were conducted. When the solid, isothermal substrate was replaced with a one-dimensionally porous substrate, was fully saturated with the same fluid as the liquid film, and was deep enough to accommodate all the liquid on it, we observed that destabilizing spatial modes were damped thereby preventing rupture and prolonging the film lifespan. This nonlinear evolution was visualized and quantified using recurrence plots.","PeriodicalId":90510,"journal":{"name":"Gravitational and space research : publication of the American Society for Gravitational and Space Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90651581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0