Results 281 to 290 of about 8,273,080 (310)
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Endocrine relationships during human spaceflight
American Journal of Physiology-Endocrinology and Metabolism, 1999Human spaceflight is associated with a chronic loss of protein from muscle. The objective of this study was to determine whether changes in urinary hormone excretion could identify a hormonal role for this loss. Urine samples were collected from the crews of two Life Sciences Space Shuttle missions before and during spaceflight.
M. D. Schluter +2 more
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A Robotics Perspective On Human Spaceflight [PDF]
Earth, Moon, and Planets, 1999 There has traditionally been a dichotomy in the space community regarding the efficacy of human versus robotic exploration of space. I argue that no such dichotomy is necessary, and that there is a natural and synergistic division of labour between man and machine, and that this division of labour will evolve in symbiotic fashion.
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Human spaceflight: science or spectacle?
Physics World, 2009On 20 July 1969 NASA's Apollo11 mission landed on the surface of the Moon. Apollo was done, to paraphrase US President John F Kennedy, because it was hard, and human spaceflight still remains very hard. Indeed, since the sixth and final Apollo lunar landing in December 1972, all of human spaceflight has been constrained to low Earth orbit – just a few ...
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Effect of spaceflight on human protein metabolism
American Journal of Physiology-Endocrinology and Metabolism, 1993Nitrogen balance and the whole body protein synthesis rate were measured before, during, and after a 9.5-day spaceflight mission on the space shuttle Columbia. Protein synthesis was measured by the single-pulse [15N]glycine method. Determinations were made 56, 26, and 18 days preflight, on flight days 2 and 8, and on days 0, 6, 14, and 45 postflight ...
M. J. Leskiw +2 more
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Spaceflight induced changes in the human proteome
Expert Review of Proteomics, 2016Spaceflight is one of the most extreme conditions encountered by humans: Individuals are exposed to radiation, microgravity, hypodynamia, and will experience isolation. A better understanding of the molecular processes induced by these factors may allow us to develop personalized countermeasures to minimize risks to astronauts.
Irina M. Larina +8 more
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Hibernation and torpor, prospects for human spaceflight?
, 2018Despite substantial technical progress in the last decades, long-distance human space travel beyond the Earth-Moon system still represents a challenge. Resources for sustaining humans in good physical and mental health on such journeys are important drivers of complexity and cost.
G. Petit +6 more
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Longevity of the Human Spaceflight Program
AIP Conference Proceedings, 2007The longevity of the human spaceflight program is important to our survival prospects. On May 27, 1993 I proposed a method for estimating future longevity, based on past observed longevity using the Copernican Principle: if your observation point is not special the 95% confidence level prediction of future longevity is between (1/39)th and 39 times the
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The Effects of Prolonged Spaceflights on the Human Body
Advances in Space Biology and Medicine, 1991Publisher Summary Results of medical investigations of long-term missions have shown that humans can adequately adapt and efficiently work in space for as long as a year. In the past, good health condition and adequate performance during extended space missions were enhanced by various measures: countermeasures against the adverse effects of ...
Anatolyi I. Grigoriev +1 more
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Human Spaceflight and Exploration
2013History of Human Spaceflight.- Space Exploration.- The effects of spaceflight on the human body and mind.- Life support systems.- Space suits.- Astronaut selection and training.- Mapping our world, the flight of European astronaut Gerhard Thiele on STS-99.
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Effects of spaceflight on human calf hemodynamics
Journal of Applied Physiology, 2001Chronic microgravity may modify adaptations of the leg circulation to gravitational pressures. We measured resting calf compliance and blood flow with venous occlusion plethysmography, and arterial blood pressure with sphygmomanometry, in seven subjects before, during, and after spaceflight.
Benjamin D. Levine +8 more
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