keyword
MENU ▼
Read by QxMD icon Read
search

astronaut

keyword
https://www.readbyqxmd.com/read/28931714/early-career-researchers-an-interview-with-kakani-katija
#1
(no author information available yet)
Kakani Katija is a Principal Engineer at the Monterey Bay Aquarium Research Institute, USA, where she designs and builds instrumentation to study marine invertebrate ecomechanics. She received her Bachelor's degree in Aeronautics and Astronautics from the University of Washington, USA, before moving to the California Institute of Technology, USA, for her Master's degree in Aeronautics with Morteza Gharib and PhD in Bioengineering in the laboratory of John Dabiri, completed in 2010. Katija was recognised as a National Geographic Emerging Explorer in 2011 and has given presentations at TEDYouth and TEDWomen...
September 15, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28925865/structural-changes-of-human-serum-albumin-hsa-in-simulated-microgravity
#2
Azadeh Hekmat, Zahra Hajebrahimi, Amir Motamedzade
Nowadays, the biological effects of microgravity have been the subject of various experimental researches. The purpose of this study was to investigate the probable biological effects of microgravity on the human serum albumin (HSA) structure after 3 and 24 h exposure via various spectroscopic instruments. The UV-Visible, near-UV-CD and intrinsic fluorescence spectroscopy represented that microgravity can remarkably change the tertiary structure of HSA. Additionally, the ANS affinity for HSA incremented when the protein was exposed to simulate microgravity compared to unexposed HSA, which may possibly have appeared attributable to expansion of the structure of simulated HSA...
September 17, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28923143/validation-of-the-cognition-test-battery-for-spaceflight-in-a-sample-of-highly-educated-adults
#3
Tyler M Moore, Mathias Basner, Jad Nasrini, Emanuel Hermosillo, Sushila Kabadi, David R Roalf, Sarah McGuire, Adrian J Ecker, Kosha Ruparel, Allison M Port, Chad T Jackson, David F Dinges, Ruben C Gur
BACKGROUND: Neuropsychological changes that may occur due to the environmental and psychological stressors of prolonged spaceflight motivated the development of the Cognition Test Battery. The battery was designed to assess multiple domains of neurocognitive functions linked to specific brain systems. Tests included in Cognition have been validated, but not in high-performing samples comparable to astronauts, which is an essential step toward ensuring their usefulness in long-duration space missions...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28923141/carotid-and-femoral-arterial-wall-distensibility-during-long-duration-spaceflight
#4
Philippe Arbeille, Romain Provost, Kathryn Zuj
INTRODUCTION: This study aimed to assess changes in common carotid (CA) and superficial femoral (FA) arterial stiffness during long-duration spaceflight. METHODS: Ultrasound imaging was used to investigate the CA and FA of 10 astronauts preflight (PRE), on flight day 15 (FD15), after 4-5 mo (FD4-5m), and 4 d after return to Earth (R+4). Arterial wall properties were assessed through the calculation of strain, stiffness (β), pressure-strain elastic modulus (Ep), and distensibility (DI)...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28923138/orientation-preferences-and-motion-sickness-induced-in-a-virtual-reality-environment
#5
Wei Chen, Jian-Gang Chao, Yan Zhang, Jin-Kun Wang, Xue-Wen Chen, Cheng Tan
BACKGROUND: Astronauts' orientation preferences tend to correlate with their susceptibility to space motion sickness (SMS). Orientation preferences appear universally, since variable sensory cue priorities are used between individuals. However, SMS susceptibility changes after proper training, while orientation preferences seem to be intrinsic proclivities. The present study was conducted to investigate whether orientation preferences change if susceptibility is reduced after repeated exposure to a virtual reality (VR) stimulus environment that induces SMS...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28923137/carbon-dioxide-physiological-training-at-nasa
#6
Jennifer Law, Millennia Young, David Alexander, Sara S Mason, Mary L Wear, Claudia M Méndez, David Stanley, Valerie Meyers Ryder, Mary Van Baalen
INTRODUCTION: Astronauts undergo CO2 exposure training to recognize their symptoms that can arise acutely both on the ground and in spaceflight. This article describes acute CO2 exposure training at NASA and examines the symptoms reported by astronauts during training. METHODS: In a controlled training environment, astronauts are exposed to up to 8% CO2 (60 mmHg) by a rebreathing apparatus. Symptoms are reported using a standard form. RESULTS: Symptom documentation forms between April 1994 and February 2012 were obtained for 130 astronauts...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28904800/alterations-in-hematologic-indices-during-long-duration-spaceflight
#7
Hawley Kunz, Heather Quiriarte, Richard J Simpson, Robert Ploutz-Snyder, Kathleen McMonigal, Clarence Sams, Brian Crucian
BACKGROUND: Although a state of anemia is perceived to be associated with spaceflight, to date a peripheral blood hematologic assessment of red blood cell (RBC) indices has not been performed during long-duration space missions. METHODS: This investigation collected whole blood samples from astronauts participating in up to 6-months orbital spaceflight, and returned those samples (ambient storage) to Earth for analysis. As samples were always collected near undock of a returning vehicle, the delay from collection to analysis never exceeded 48 h...
2017: BMC Hematology
https://www.readbyqxmd.com/read/28901176/an-evaluation-of-the-effectiveness-of-the-national-aeronautics-and-space-administration-mission-x-child-health-promotion-program-in-the-united-states
#8
Jungwon Min, Zhengqi Tan, Laurie Abadie, Scott Townsend, Hong Xue, Youfa Wang
PURPOSE: To examine the effects of the National Aeronautics and Space Administration Mission-X: Train Like an Astronaut program (MX) on children's health-related knowledge and behaviors of a sample of US participants. DESIGN: A nonexperimental pilot intervention study in 5 cities with a pre-post comparison of children's health-related knowledge and behaviors in the United States in 2014 and 2015. SAMPLE: Children (n = 409) with a mean age (standard deviation) of 10...
January 1, 2017: American Journal of Health Promotion: AJHP
https://www.readbyqxmd.com/read/28894789/impact-of-the-mk-vi-skinsuit-on-skin-microbiota-of-terrestrial-volunteers-and-an-international-space-station-bound-astronaut
#9
Richard A Stabler, Helena Rosado, Ronan Doyle, David Negus, Philip A Carvil, Juan G Kristjánsson, David A Green, Rafael Franco-Cendejas, Cadi Davies, Andreas Mogensen, Jonathan Scott, Peter W Taylor
Microgravity induces physiological deconditioning due to the absence of gravity loading, resulting in bone mineral density loss, atrophy of lower limb skeletal and postural muscles, and lengthening of the spine. SkinSuit is a lightweight compression suit designed to provide head-to-foot (axial) loading to counteract spinal elongation during spaceflight. As synthetic garments may impact negatively on the skin microbiome, we used 16S ribosomal RNA (rRNA) gene amplicon procedures to define bacterial skin communities at sebaceous and moist body sites of five healthy male volunteers undergoing SkinSuit evaluation...
2017: NPJ Microgravity
https://www.readbyqxmd.com/read/28892829/author-response-optic-nerve-sheath-distention-as-a-protective-mechanism-against-the-visual-impairment-and-intracranial-pressure-syndrome-in-astronauts
#10
Thomas H Mader, C Robert Gibson, Andrew G Lee
No abstract text is available yet for this article.
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28892828/optic-nerve-sheath-distention-as-a-protective-mechanism-against-the-visual-impairment-and-intracranial-pressure-syndrome-in-astronauts
#11
Peter Wostyn, Peter Paul De Deyn
No abstract text is available yet for this article.
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28890459/james-e-webb-technocracy-and-the-new-deal-roots-of-space-age-management
#12
Allan A Needell
abstract James E. Webb, NASA's Administrator during the hectic years preparing to send American astronauts to the Moon, has come to represent the pinnacle of postwar American optimism and support for large-scale, technically complex national undertakings. Success in 1969 lent credence to Webb's faith in "space age management." By the 1980s such "technocratic optimism" had precipitously declined. Since 1985, with the publication of Walter A. McDougall's Pulitzer Prize winning. . . The Heavens and the Earth, the rise and decline of such optimism has often been framed in the context of Cold War ideology and competition...
2017: Technology and Culture
https://www.readbyqxmd.com/read/28887939/the-radiation-environment-on-the-surface-of-mars-summary-of-model-calculations-and-comparison-to-rad-data
#13
Daniel Matthiä, Donald M Hassler, Wouter de Wet, Bent Ehresmann, Ana Firan, John Flores-McLaughlin, Jingnan Guo, Lawrence H Heilbronn, Kerry Lee, Hunter Ratliff, Ryan R Rios, Tony C Slaba, Michael Smith, Nicholas N Stoffle, Lawrence W Townsend, Thomas Berger, Günther Reitz, Robert F Wimmer-Schweingruber, Cary Zeitlin
The radiation environment at the Martian surface is, apart from occasional solar energetic particle events, dominated by galactic cosmic radiation, secondary particles produced in their interaction with the Martian atmosphere and albedo particles from the Martian regolith. The highly energetic primary cosmic radiation consists mainly of fully ionized nuclei creating a complex radiation field at the Martian surface. This complex field, its formation and its potential health risk posed to astronauts on future manned missions to Mars can only be fully understood using a combination of measurements and model calculations...
August 2017: Life Sciences in Space Research
https://www.readbyqxmd.com/read/28885042/searching-for-life-on-mars-before-it-is-too-late
#14
Alberto G Fairén, Victor Parro, Dirk Schulze-Makuch, Lyle Whyte
Decades of robotic exploration have confirmed that in the distant past, Mars was warmer and wetter and its surface was habitable. However, none of the spacecraft missions to Mars have included among their scientific objectives the exploration of Special Regions, those places on the planet that could be inhabited by extant martian life or where terrestrial microorganisms might replicate. A major reason for this is because of Planetary Protection constraints, which are implemented to protect Mars from terrestrial biological contamination...
September 8, 2017: Astrobiology
https://www.readbyqxmd.com/read/28869392/intracranial-pressure-induced-optic-nerve-sheath-response-as-a-predictive-biomarker-for-optic-disc-edema-in-astronauts
#15
Peter Wostyn, Peter Paul De Deyn
A significant proportion of the astronauts who spend extended periods in microgravity develop ophthalmic abnormalities. Understanding this syndrome, called visual impairment and intracranial pressure (VIIP), has become a high priority for National Aeronautics and Space Administration, especially in view of future long-duration missions (e.g., Mars missions). Moreover, to ensure selection of astronaut candidates who will be able to complete long-duration missions with low risk of the VIIP syndrome, it is imperative to identify biomarkers for VIIP risk prediction...
September 4, 2017: Biomarkers in Medicine
https://www.readbyqxmd.com/read/28860998/human-biomechanical-and-cardiopulmonary-responses-to-partial-gravity-a-systematic-review
#16
REVIEW
Charlotte Richter, Bjoern Braunstein, Andrew Winnard, Mona Nasser, Tobias Weber
The European Space Agency has recently announced to progress from low Earth orbit missions on the International Space Station to other mission scenarios such as exploration of the Moon or Mars. Therefore, the Moon is considered to be the next likely target for European human space explorations. Compared to microgravity (μg), only very little is known about the physiological effects of exposure to partial gravity (μg < partial gravity <1 g). However, previous research studies and experiences made during the Apollo missions comprise a valuable source of information that should be taken into account when planning human space explorations to reduced gravity environments...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28860502/bi-directional-and-shared-epigenomic-signatures-following-proton-and-56-fe-irradiation
#17
Soren Impey, Timothy Jopson, Carl Pelz, Amanuel Tafessu, Fatema Fareh, Damian Zuloaga, Tessa Marzulla, Lara-Kirstie Riparip, Blair Stewart, Susanna Rosi, Mitchell S Turker, Jacob Raber
The brain's response to radiation exposure is an important concern for patients undergoing cancer therapy and astronauts on long missions in deep space. We assessed whether this response is specific and prolonged and is linked to epigenetic mechanisms. We focused on the response of the hippocampus at early (2-weeks) and late (20-week) time points following whole body proton irradiation. We examined two forms of DNA methylation, cytosine methylation (5mC) and hydroxymethylation (5hmC). Impairments in object recognition, spatial memory retention, and network stability following proton irradiation were observed at the two-week time point and correlated with altered gene expression and 5hmC profiles that mapped to specific gene ontology pathways...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28860415/t2-relaxation-time-increases-in-lumbar-intervertebral-discs-after-21d-head-down-tilt-bed-rest
#18
T Koy, B Ganse, J Zange, J Rittweger, R Pohle-Fröhlich, P Fings-Meuthen, B Johannes, D Felsenberg, P Eysel, P M Bansmann, D L Belavý
OBJECTIVES: Spaceflight back pain and intervertebral disc (IVD) herniations cause problems in astronauts. Purpose of this study was to assess changes in T2-relaxation-time through MRI measurements before and after head-down tilt bed-rest, a spaceflight analog. METHODS: 8 men participated in the bed-rest study. Subjects remained in 6° head down tilt bed-rest in two campaigns of 21 days, and received a nutritional intervention (potassium bicarbonate 90 mmol/d) in a cross-over design...
September 1, 2017: Journal of Musculoskeletal & Neuronal Interactions
https://www.readbyqxmd.com/read/28857747/investigation-of-cerebral-venous-outflow-in-microgravity
#19
Angelo Taibi, Giacomo Gadda, Mauro Gambaccini, Erica Menegatti, Francesco Sisini, Paolo Zamboni
The gravitational gradient is the major component to face when considering the physiology of venous return and there is a growing interest in understanding the mechanisms ensuring the heart filling in the absence of gravity for astronauts who perform long-term space missions. The purpose of the Drain Brain project was to monitor the cerebral venous outflow of the crew member during an experiment on the International Space Station, so as to study the compensatory mechanisms that facilitate this essential physiological action in subjects living in a microgravity environment...
August 31, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28835667/dynamic-reverse-phase-transformation-induced-high-strain-rate-superplasticity-in-low-carbon-low-alloy-steels-with-commercial-potential
#20
Wenquan Cao, Chongxiang Huang, Chang Wang, Han Dong, Yuqing Weng
Superplastic materials are capable of exhibiting large tensile elongation at elevated temperature, which is of great industrial significance because it forms the basis of a fabrication method to produce complex shapes. Superplasticity with elongation larger than 500% has been widely realized in many metals and alloys, but seldomly been succeeded in low carbon low alloy steel, even though it is commercially applied in the largest quantity. Here we report ultrahigh superplastic elongation of 900-1200% in the FeMnAl low carbon steels at high strain rate of 10(-2)-10(-3) s(-1)...
August 23, 2017: Scientific Reports
keyword
keyword
45384
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"