منابع مشابه
Nuclear Powered and Reactionless Rockets
| We consider using emissions from radioactive atoms as the \exhaust" of a \rocket" for space propulsion. The \alpha rocket" consists of a thin lm of alpha emitting atoms on an inert backing lm of thickness 40 microns. It achieves speciic impulse values in the range 5 10 2 ; 10 3 ] km/second. It seems likely to be practical. By using 254 Cf and 250 Cm, which instead decay by spontaneous ssion, ...
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| In an earlier report, I pointed out that a bilayer lm, one of whose sides was made of-emitting radioactive atoms, would act as a \rocket." A 3-stage alpha rocket could reach, e.g., speeds of 0:0025c in a few hundred years. (1) I now describe a simple variant I call the \alpha-electric rocket." It uses alpha rays to charge a capacitor which powers an ion gun. If it works, it should be able to ...
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Background: The earlier Atomic Bomb explosion in Hiroshima and Nagasaki, and three worth mentioning nuclear accidents - detonation at Fukushima Daiichi nuclear plant, Chernobyl nuclear fallout and an accident at Three Mile Island nuclear power plant have made us more worried about the secure exploitation of nuclear energy. The central focus of this paper is to review radiation-mediated health e...
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Somatic cell nuclear transfer (SCNT or cloning) returns a differentiated cell to a totipotent status; a process termed nuclear reprogramming. Reproductive cloning has potential applications in both agriculture and biomedicine, but is limited by low efficiency. To understand the deficiencies of nuclear reprogramming, our research has focused on both candidate genes and global gene expression pat...
متن کاملNuclear Architecture and Epigenetics of Lineage Choice
Differentiation is an epigenetic process which is installed by changes of transcriptional programs over successive cellular divisions. A number of studies have reported the effects of biochemical modifications of chromatin (DNA and chromatin proteins) on the regulation of transcription. Although, these studies are able to explain how transcription of a given gene is regulated (toward activation...
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ژورنال
عنوان ژورنال: The Journal of the Society of Chemical Industry, Japan
سال: 1960
ISSN: 0023-2734,2185-0860
DOI: 10.1246/nikkashi1898.63.11_1875