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Effect of a Simulated Weightlessness Model on the Production of Rat Interferon
Journal of Interferon Research, 1982A rat model simulating some aspects of weightlessness was used to determine whether simulated weightlessness might alter interferon production. The optimum time for in-vivo induction of alpha/beta interferon (alpha/beta-IFN) by polyriboinosinic-polyribocytidylic acid was determined to be four hours in normal, mature rats.
Emily R. Morey +3 more
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An optimized index of human cardiovascular adaptation to simulated weightlessness
IEEE Transactions on Biomedical Engineering, 1996Prolonged exposure to weightlessness is known to produce a variety of cardiovascular changes, some of which may influence the astronaut's performance during a mission. In order to find a reliable indicator of cardiovascular adaptation to weightlessness, we analyzed data from nine male subjects after a 24-hour period of normal activity and after a ...
Michael Mao Wang +4 more
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Decision making after 50 days of simulated weightlessness
Brain Research, 2009By restricting physical activity levels, the bed rest simulation of weightlessness could be associated with changes in prefrontal cortex functioning that manifest as cognitive decrements, particularly for executive cognitive functions. We aimed to determine if performance on an executive function task was indeed affected by bed rest.
Daniel L. Belavy +3 more
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[Study of temperature homeostasis in real and simulated weightlessness].
Fiziologiia cheloveka, 2002The analysis of the temperature (T) reaction of the body of healthy humans was carried out using the results of investigations with the thermometry technique under antiorthostatic hypokinesia (ANOH) (38 males in the studies of 14- to 49-day duration, eight females, 120 days), isolation in a regenerated gas environment (six males, 90 to 135 days), suit ...
I. M. Larina, N. G. Lakota
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Effects of simulated weightlessness on bone properties in rats
Journal of Biomechanics, 1990Abstract This paper addresses two questions: (1) are reductions in bone apposition rate during disuse due to increased periods of ‘resting’ during bone formation? and (2) are diaphyseal strength changes due to disuse caused by changes in the quality as well as the quantity of the bone matrix?
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Effects of spaceflight and simulated weightlessness on longitudinal bone growth
Bone, 2000Indirect measurements have suggested that spaceflight impairs bone elongation in rats. To test this possibility, our laboratory measured, by the fluorochrome labeling technique, bone elongation that occurred during a spaceflight experiment. The longitudinal growth rate (LGR) in the tibia of rats in spaceflight experiments (Physiological Space ...
J.M Cavolina +6 more
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Urinary adrenaline and noradrenaline response to simulated weightless state
American Journal of Physiology-Legacy Content, 1964Sixteen normal subjects were placed in a simulated weightless state, i.e., water immersion. After 6 hr of water immersion, urine samples were collected and bio-assayed for adrenaline and noradrenaline. The excretion of adrenaline was moderately increased ( P < 0.15 > 0.10), possibly related to the anxiety associated with the immersion.
Duane E. Graveline +2 more
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The action of simulated and true weightlessness on the digestive tract of rats
Advances in Space Research, 1981Rats on board the Soviet Cosmos 936 satellite for l8 1/2 days showed a decreased glycoprotein secretion from the salivary mucous glands, stomach and intestine, and an increased leucine aminopeptidase and acid phosphatase content from the small intestine. Grimelius positive cells were activated.
Lungu D +5 more
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RESPONSES OF ROOTS TO SIMULATED WEIGHTLESSNESS ON THE FAST-ROTATING CLINOSTAT
1979Sedimentable cell particles are distributed randomly along the horizontal axis of the fast-rotating clinostat. They neither sediment in the direction of gravity, nor in the direction of the centrifugal force, nor in the direction of the resultant force of both.
Volker Sobick, Andreas Sievers
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Contributory factors to orthostatic intolerance after simulated weightlessness
Clinical Physiology, 1999Various factors may contribute to orthostatic intolerance (OI) observed after space flights or simulated weightlessness such as bed rest experiments: individual physical and physiological factors (arterial blood pressure (BP), height), physiological changes induced by real or simulated weightlessness (hypovolaemia, increase in venous distensibility ...
Vasseur‐Clausen +4 more
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