生物手性选择场景的计算机模拟

IF 1.7 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS International Journal of Astrobiology Pub Date : 2022-03-14 DOI:10.1017/S147355042200009X
S. Longo, Carmela Mundo, G. Micca Longo
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引用次数: 1

摘要

生物同手性选择的生物场景是计算机建模在天体生物学中最有趣的应用之一。这些情景已经被研究了70多年,但仍有大量的研究可以更好地评估它们,特别是在选择性灭绝过程模型的发展中。在本文中,我们回顾了以前的研究,这些研究是基于这一过程的生物学模型,并提出了一类新的计算机程序:它们进一步证明了选择性灭绝动力学的复杂性,以及非平凡的化学物理概念在其中所起的作用。事实上,结果显示两种不同手性类型的种群之间存在巨大而持久的差异,这是由于个体种群的自由波动很大,而总体种群由于有限的化学能而稳定。这种强烈的差异最终导致两种类型中的一种选择性灭绝。通过这种方式,计算机模拟提供了越来越多的证据,支持生物的设想。
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Computer simulations of biotic chiral selection scenarios
Abstract The biotic scenario of the selection of biological homochirality is one of the most interesting applications of computer modelling to astrobiology. These scenarios have been studied for more than 70 years, yet there are plenty of studies to better assess them, in particular in the development of models of the selective extinction process. In this paper, we review former studies performed by biology-grounded models of this process and present a new class of computer programs: they further demonstrate the complexity of the selective extinction dynamics and the role played into it by non-trivial chemical-physical concepts. Indeed, the results display large and persistent differences between the populations of the two different chiral types, made possible by the freedom of individual populations to fluctuate wildly while the total population is stabilized by the limited availability of chemical energy. Such strong differences ultimately lead to the selective extinction of one of the two types. This way, computer simulations provide increasing evidence in favour of the biotic scenario.
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来源期刊
International Journal of Astrobiology
International Journal of Astrobiology 地学天文-地球科学综合
CiteScore
3.70
自引率
11.80%
发文量
45
审稿时长
>12 weeks
期刊介绍: International Journal of Astrobiology is the peer-reviewed forum for practitioners in this exciting interdisciplinary field. Coverage includes cosmic prebiotic chemistry, planetary evolution, the search for planetary systems and habitable zones, extremophile biology and experimental simulation of extraterrestrial environments, Mars as an abode of life, life detection in our solar system and beyond, the search for extraterrestrial intelligence, the history of the science of astrobiology, as well as societal and educational aspects of astrobiology. Occasionally an issue of the journal is devoted to the keynote plenary research papers from an international meeting. A notable feature of the journal is the global distribution of its authors.
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