Results 261 to 270 of about 303,776 (293)
Some of the next articles are maybe not open access.
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
openaire +3 more sources
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
openaire +3 more sources
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
openaire +3 more sources
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
openaire +3 more sources
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
openaire +3 more sources
Leptin responses to physical inactivity induced by simulated weightlessness
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 2000Physical inactivity induced by head-down bed rest (HDBR) affects body composition (BC). Leptin is involved in BC regulation by acting on fuel homeostasis. We investigated whether leptin and counterregulatory hormone levels are affected by a 7-day HDBR. Fasting blood was sampled daily (0700) in males ( n = 8) and on alternating days in females ( n = 8)
Claude Gharib +4 more
openaire +3 more sources
Orthostatic tests after a 4‐day confinement or simulated weightlessness
Clinical Physiology, 1997Besides microgravity, inactivity is likely to play a role in the cardiovascular deconditioning after space flights and weightlessness simulations. The aim of the study was to compare the effects of a 4‐day head‐down bed rest (HDBR) (−68) and a 4‐day confinement (C) on cardiovascular responses to orthostatic stress. Eight male subjects underwent head‐up
Antonio Güell +6 more
openaire +3 more sources
Postural reactions of circulation and its regulation during simulated weightlessness
Acta Astronautica, 1994The extention and intensification of space exploration the influence of weightlessness on human organism and the formation of a new level of adaptation. The studies of blood circulation is very important because of frequent occurrence of cardiovascular disorders in the middle age subjects.
V.A. Gornago +3 more
openaire +3 more sources
[Weightlessness or weightlessness simulation and vascular remodeling].
Hang tian yi xue yu yi xue gong cheng = Space medicine & medical engineering, 2003Weightlessness is inavoidable during spaceflight. It brings profound physiological effects on human body. Vascular remodeling is one of the important changes of cardiovascular system caused by weightlessness or simulated weightlessness. The paper summarized the studies on the effects of weightlessness or weightlessness simulation on vascular remodeling
Yong, Yue +3 more
openaire +1 more source
Brain Norepinephrine Changes With Simulated Weightlessness and Relation to Exercise Training
Physiology & Behavior, 1999Maintenance of nervous system function during periods of a deconditioning syndrome is important to prevent diminished psychological/behavioral, and physiological function observed during periods of bed rest, physical inactivity, and weightlessness. A main neurotransmitter is norepinephrine (NE), and its regulation yields insight into nervous system ...
Gary M. Kastello, Mark S. Sothmann
openaire +3 more sources