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- W2076829174 abstract "Technologically important extremophiles including oil eating microbes, uranium and rocket fuel perchloratereduction microbes, electron producing microbes and electrode electrons feeding microbes were compared interms of their 16S rRNA sequences, a standard targeted sequence in comparative phylogeny studies. Microbesthat were reported to have survived a prolonged dormant duration were also studied. Examples included therecently discovered microbe that survives after 34,000 years in a salty environment while feeding off organiccompounds from other trapped dead microbes. Shannon entropy of the 16S rRNA nucleotide composition andfractal dimension of the nucleotide sequence in terms of its atomic number fluctuation analyses suggest aselected range for these extremophiles as compared to other microbes; consistent with the experience ofrelatively mild evolutionary pressure. However, most of the microbes that have been reported to survive inprolonged dormant duration carry sequences with fractal dimension between 1.995 and 2.005 (N = 10 out of 13).Similar results are observed for halophiles, red-shifted chlorophyll and radiation resistant microbes. The resultssuggest that prolonged dormant duration, in analogous to high salty or radiation environment, would select highfractal 16S rRNA sequences. Path analysis in structural equation modeling supports a causal relation betweenentropy and fractal dimension for the studied 16S rRNA sequences (N = 7). Candidate choices for high fractal16S rRNA microbes could offer protection for prolonged spaceflights. BioBrick gene network manipulationcould include extremophile 16S rRNA sequences in synthetic biology and shed more light on exobiology andfuture colonization in shielded spaceflights. Whether the high fractal 16S rRNA sequences contain an asteroidlikeextra-terrestrial source could be speculative but interesting." @default.
- W2076829174 created "2016-06-24" @default.
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- W2076829174 date "2011-09-08" @default.
- W2076829174 modified "2023-09-27" @default.
- W2076829174 title "Technologically important extremophile 16S rRNA sequence Shannon entropy and fractal property comparison with long term dormant microbes" @default.
- W2076829174 doi "https://doi.org/10.1117/12.893450" @default.
- W2076829174 hasPublicationYear "2011" @default.
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