Results 191 to 200 of about 1,264 (234)
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[Changes of cerebral circulation during weightlessness or simulated weightlessness].
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering, 2002The results about studies on changes of the cerebral circulation during weightlessness/simulated weightlessness were reviewed in this paper. The possible influencing mechanism of weightlessness on cerebral circulation and its physiological significance were summarized.
D W, Wu, X Y, Shen
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[Changes of learning and memory function under weightlessness or simulated weightlessness].
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering, 2002The work efficiency of astronauts has an intimate connection with the brain function state during space flight. The research results of the learning and memory mechanism of the brain in recent years were introduced. The effects of weightlessness or simulated weightlessness on brain's learning, memory, focused attention and many other higher neural ...
D W, Wu, X Y, Shen
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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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Research advance in effects of weightlessness or simulated weightlessness on tumor cells.
Zhongguo yi xue ke xue yuan xue bao. Acta Academiae Medicinae Sinicae, 2014Weightless environment is a rare phenomenon on the ground where the interactions among cells and internal cellular structures disappear or become weakened. Studies on the biological features and molecular expression of tumors cells in weightlessness condition may provide new clues to the tumor initiation, process, diagnosis, and therapy.
De, Chang +2 more
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[Thermoregulation under simulated weightlessness].
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering, 1998The effect of simulated weightlessness on thermoregulation was studied in 5 subjects. The experiment consisted of 3d baseline measurements, 7d head-down bed rest and 2d recovery. Circadian rhythm was assessed by continuous measurements of rectal temperature and skin temperature with 2h intervals.
M, Qiu +5 more
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[Metabolic changes in simulated weightlessness].
Anesteziologiia i reanimatologiia, 19908 healthy subjects participated in 2 series of experiments on the comparative studies of two techniques of respiratory therapy employing multicomponent anesthesia during controlled lung ventilation in normal conditions and in experimental weightlessness.
L L, Stazhadze +3 more
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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 D, Sibonga +6 more
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[The effect of weightlessness and simulated weightlessness on the expression of genes].
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering, 2003The research results of the relationship between gene expression and weightlessness or simulated weightlessness were studied. The influence of weight on the expression of genes in central nervous system were summarized in three aspects. It can be concluded that the expression of genes in central nervous system were precisely regulated by weight. It was
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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 ...
Mao Wang +4 more
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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.
G, Sonnenfeld +3 more
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