Results 211 to 220 of about 2,310,283 (266)

Search for strangelets in lunar soil

Journal of Physics G: Nuclear and Particle Physics, 2006
The possible existence of strangelets has been hypothesized for a long time but has not been confirmed experimentally. Our experiment aims to search for strangelets in lunar soil samples, where the predicted concentration of one oxygen strangelet per 1016–1017 normal oxygen atoms is 104 times higher than that on earth.
Ke Han, the LSSS Collaboration
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Dynamic-compacting based lunar soil simulant preparation for subsurface exploration

, 2020
Compared to other technical methods, drilling and coring by only using the compound motions of rotation and penetration can sample subsurface lunar soils relatively efficiently. Considering that drill tool's power consumption and soils' coring morphology
Junyue Tang, Q. Quan, Shengyuan Jiang, Yi Shen, Ye Tian, Jieneng Liang, Weiwei Zhang, Huazhi Chen   +7 more
semanticscholar   +1 more source

Accumulation of Carbon in Lunar Soils

Nature Physical Science, 1973
Analyses of the carbon compounds released by pyrolysis from size fractions and particle separates of lunar soils indicate that the rate at which extralunar carbon is accumulated is slow compared to the rate at which it is redistributed among the different particle types by the cycle of particle erosion and aggregation.
D. J. DESMARAIS, J. M. HAYES, W. G. MEINSCHEIN   +2 more
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Oxygen From Lunar Soils

SAE Technical Paper Series, 1996
<div class="htmlview paragraph">We have conducted experiments on 16 lunar soils and 3 lunar volcanic glass samples to study the extraction of oxygen, an important resource for future lunar bases. The samples were chosen to span the range of composition and mineralogy represented in the Apollo collection.
Carlton C. Allen, Richard V. Morris, David S. McKay   +2 more
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Multivariate Comparison of Lunar Soil Simulants

Journal of Aerospace Engineering, 2019
Since 1960, when the first probes landed on the Moon, multiple specimens of lunar soil have been available for research.
P. Zarzycki, J. Katzer
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A lunar soil evolution model

The Moon, 1975
Comminution, agglutination, and replenishment processes in a lunar soil are modeled by a system of time-dependent linear differential equations. In the model, a soil is subdivided into coarse-particle, fine-particle, and agglutinate fractions. The relative mass abundance of each component in a mature soil is found to be proportional to rates for the ...
W. W. Mendell, D. S. McKay
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Lunar problems in soil engineering

Journal of Terramechanics, 1965
In the relatively near future unmanned, and perhaps manned spacecraft will make soft landings on the moon, and ultimately on some of the other planets. Because our knowledge of the intimate small-scale properties of the lunar surface is almost nonexistent, it is desireable to devise surface models and materials in line with current information for the ...
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Impact-driven disproportionation origin of nanophase iron particles in Chang’e-5 lunar soil sample

Nature Astronomy, 2022
Chen Li, Zhuang Guo, Yang Li, Kairui Tai, K. Wei, Xiongyao Li, Jianzhong Liu, Wenhui Ma   +7 more
semanticscholar   +1 more source

Lunar soil simulants alter macrophage survival and function

Journal of Applied Toxicology, 2019
Lunar regolith samples collected during previous Apollo missions were found to contain components that were established to be toxic to humans; however, the health effects due to inhalation of lunar soil as a whole are still unknown.
Melvin Li, K. Thompson, Jillian C. Nissen, D. Hendrix, J. Hurowitz, S. Tsirka   +5 more
semanticscholar   +1 more source

Compaction of Lunar‐Type Soil

Journal of Aerospace Engineering, 1994
Soil plays an important role in the construction of foundations of roads and buildings. The utilization of soil traditionally involves the compaction of the insitu or previously loosened material t...
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