T S Keller,A M Strauss
T S Keller
It is generally agreed that the single factor that most limits human survivability in non-Earth environments is the phenomenon of bone demineralization and the medical problems induced by the subsequent imbalance in the calcium metabolism. ...
A review of muscle atrophy in microgravity and during prolonged bed rest [0.03%]
微重力和长期卧床休息引起的肌肉萎缩研究进展
P M Droppert
P M Droppert
With the prospect of long duration space missions in Earth orbit or to Mars, there is a need for adequate information on the physiological adaptations that will occur. One consequence of prolonged exposure to microgravity is muscle atrophy ...
F Raulin,C Frere,P Paillous et al.
F Raulin et al.
Titan, the largest satellite of Saturn, has a dense N2-CH4 atmosphere rich in organic compounds, both in gas and in aerosol phases. Its surface is probably covered by oceans of liquid methane-ethane mixtures, with many dissolved organics. T...
M D Nussinov,V V Burdyuzha,S I Gleizer
M D Nussinov
An analysis of the experimental data available and of the present theoretical concepts shows that even the initial physicochemical chemical precellular stages of biological evolution are impossible in the interstellar medium, while biomonom...
What makes a planet habitable, and how to search for habitable planets in other solar systems [0.03%]
什么样的行星才适宜居住？以及如何在其他星系中寻找这样的宜居行星？
M D Papagiannis
M D Papagiannis
The availability of liquid water is the most important factor that makes a planet habitable, because water is a very effective polar molecule and hence an excellent solvent and facilitator for the complex chemistry of life. Its presence pre...
C N Matthews
C N Matthews
Current research in cosmochemistry shows that crude organic solids of high molecular weight are readily formed in planetary, interplanetary and interstellar environments. Underlying much of this ubiquitous chemistry is a low energy route le...
Drying as one of the extreme factors for the microflora of the atmosphere [0.03%]
干燥作为大气微生物群落的一个极端因素
S V Lysenko,N S Demina
S V Lysenko
An investigation of the effects of drying and drying-rewetting cycles under vacuum conditions of 10(-2) torr at -30 degrees C on conidia of the atmospheric strain Penicillium chrysogenum from 48-77 km heights, collected by meteorological ro...
M J Fogg
M J Fogg
A Monte Carlo computer model of extra-solar planetary formation and evolution, which includes the planetary geochemical carbon cycle, is presented. The results of a run of one million galactic disc stars are shown where the aim was to asses...
Polycondensation reactions of certain biologically essential molecules on mineral surfaces [0.03%]
矿物表面特定生命必需分子的缩合反应研究进展
V A Otroshchenko,L N Moiseeva,N V Vasileva et al.
V A Otroshchenko et al.
Methods of detecting extraterrestrial forms of organic matter should take into account the results of research in the effects of irradiation on the synthesis of biopolymers. Processes occurring on clay mineral surfaces and on the surfaces o...
An approach to the detection of microbe life in planetary environments through charge-coupled devices [0.03%]
通过电荷耦合器件在行星环境中检测微生物生命的方法
M D Nussinov,S V Lysenko,Kozlovskii MYu et al.
M D Nussinov et al.
The use of charge-coupled devices is suggested as a means for detecting growth of micro-organism colonies. The accuracy of the method is determined by channel width and the sensitivity by the signal/noise ratio. The method was tested on a d...