weightlessness

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weight·less·ness

(wāt'les-nĕs),
The psychophysiologic effect of zero gravity, as experienced by someone falling freely in a vacuum (for example, astronauts in a stable orbit). A temporary state of simulated weightlessness can be achieved during powered flight within the earth's atmosphere by traversing an inverted parabolic curve where gravitational pull and centrifugal force cancel each other out.
A state in which there is no gravitational effect on a body or material
Physiologic effects Bone mineral loss, altered blood chemistries, weakened immune system, variable heart rate, arrhythmias, loss of skeletal and cardiac muscle mass and strength, increased urinary loss of nitrogen and phosphorus, motion sickness, and redistribution of fluids that are normally pooled in the lower torso and legs, resulting in a ‘fat face’
References in periodicals archive ?
(24) Furthermore, recent spaceflight and long-term head down tilt bed rest studies used to simulate microgravity exposure have likewise demonstrated impairments in diastolic functioning due to inefficiencies with untwisting.
Kearns-Jonker's research will study the aging of neonatal and adult cardiac stem cells in microgravity with the ultimate goal of improving cardiac cell therapy.
(6.) "Modeled microgravity" increases virulence of common bacterial pathogen.
In conclusion, reversible effect of microgravity is oedema of face, change in taste, abnormal expression of face, teeth pain and xerostomia.
During the experiments aboard the NASA microgravity plane, the Purdue team was able to directly measure cellular signaling events associated with gravity sensing in a model plant cell system, the Ceratopteris fern spore.
In microgravity, the usual cues for bone production, such as weight bearing, are missing.
These experiments were performed on rhesus monkeys and included the chronic invasive recording of hemodynamic signals during simulated microgravity via prolonged head down tilt (HDT).
and the Centennial of Flight as well as IS$ A Home in Microgravity--a yearlong event focusing on microgravity aboard the International Space Station.
It will enable its wearer to harness the power of the moon because it is derived from Overnight sensation - a rose grown in microgravity aboard the John Glenn Shuttle mission of 1998.
NASA has found that more than two-thirds of all shuttle crews have experienced difficulties associated with microgravity and motion sickness.
Researchers found that during two 1998 space flight missions, exposure to microgravity reduced the number of arousals due to sleep-disordered breathing and virtually eliminated snoring in five healthy subjects (Am.
It had a lower priority, reports NASA, than the International Space Shuttle payloads, the Hubble Space Telescope reboost, and Microgravity experiments.