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首页> 外文期刊>Crystal growth & design >Influence of Nucleic Acids on the Synthesis of Crystalline Ca(II), Ba(II), and Sr(II) Silica-Carbonate Biomorphs: Implications for the Chemical Origin of Life on Primitive Earth
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Influence of Nucleic Acids on the Synthesis of Crystalline Ca(II), Ba(II), and Sr(II) Silica-Carbonate Biomorphs: Implications for the Chemical Origin of Life on Primitive Earth

机译：核酸对结晶Ca（II），Ba（II）和Sr（II）二氧化硅酯的影响的影响：对原始地球生命的化学来源的影响

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摘要

The Precambrian era is associated with the origin of life on primitive Earth. It was, in fact, in that era that ribonucleic acid (RNA) was first acquired. From this evolved the genomic deoxyribonucleic acid (DNA) that later generated the biomolecules that formed the first cell. In this way, with the ongoing changes in environmental factors, the first cells evolved to give rise to higher multicellular organisms, i.e., plants and animals. Radiolarians and diatoms are organisms that have been conserved since the Precambrian era. However, although these organisms are alive (they can be considered as living fossils), they do not suffice to explain the origin of life. To understand the origin of life, the interactions among inorganic compounds that existed in the Precambrian era must be elucidated. In this context, calcium, barium, or strontium silico-carbonates (usually called silica-biomorphs) have been simply named biomorphs that emulate the morphologies of organisms, such as flowers, leaves, stems, helices, worms, radiolarians, and diatoms, among others. The shapes of the biomorphs can be implicated in the origin of life due to their similarity with the shapes of the cherts of the Precambrian era. However, biomorphs are inorganic compounds that do not contain any organic biomolecules such as nucleic acids or proteins inside their chemical structures. The aim of the present work was to synthesize calcium, barium, or strontium silica biomorphs in the presence of nucleic acids: genomic DNA (linear double helices), plasmid DNA (circular helices), and RNA (a single chain helix). The morphology of these biomorphs was assessed through scanning electron microscopy (SEM). The obtained microphotographs revealed that nucleic acids direct the synthesis of biomorphs toward a unique and specific structure for each of these biomolecules. The chemical composition and the crystalline structure were determined through micro-Raman spectroscopy and X-ray diffraction to characterize the m
机译：Precambrian时代与原始地球上的生命起源有关。事实上，在那个时代，首先获得核糖核酸（RNA）。从这种情况流化，后来产生形成第一细胞的生物分子的基因组脱氧核糖核酸（DNA）。通过这种方式，随着环境因素的持续变化，第一细胞进化以产生更高的多细胞生物，即植物和动物。放射性弧度和硅藻是自前普里亚时代以来一直被保守的生物。然而，虽然这些生物是活着的（它们可以被视为活化石），但他们不足以解释生命的起源。为了了解生命的起源，必须阐明在预先征收中存在的无机化合物之间的相互作用。在这种情况下，钙，钡或锶硅 - 碳酸盐（通常称为二氧化硅 - 生物型）已经简单地命名为生物型照片，其模仿生物体的形态，例如花，叶，茎，螺旋，蠕虫，放射性物质和硅藻其他。由于它们与前兆时代的燧石的形状相似，生物摩尔人的形状可以涉及生命的起源。然而，生物摩洛片是无机化合物，其不含任何有机生物分子，例如其化学结构内的核酸或蛋白质。本作本作的目的是在核酸存在下合成钙，钡或锶二氧化铝生物素：基因组DNA（线性双螺旋），质粒DNA（圆形螺旋）和RNA（单链螺旋）。通过扫描电子显微镜（SEM）评估这些生物型照片的形态。所获得的显微镜谱图显示核酸将生物素的合成指向每个生物分子的独特和特异性结构。通过微拉曼光谱和X射线衍射测定化学成分和结晶结构，以表征M.

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  • 来源
    《Crystal growth & design》 |2019年第8期|共16页
  • 作者

    Cuellar-Cruz Mayra; Islas Selene R.; Gonzalez Gonzalo; Moreno Abel;

  • 作者单位

    Univ Guanajuato Dept Biol Div Ciencias Nat &

    Exactas Campus Guanajuato Noria Alta S-N Guanajuato 36050 Mexico;

    Univ Nacl Autonoma Mexico Inst Ciencias Aplicadas &

    Tecnol Circuito Exterior S-N Ciudad Univ Ciudad De Mexico Mexico;

    Univ Nacl Autonoma Mexico Inst Invest Mat Av Univ 3000 Ciudad Univ Ciudad De Mexico 04510 DF Mexico;

    Univ Nacl Autonoma Mexico Inst Quim Av Univ 3000 Ciudad Univ Ciudad De Mexico 04510 DF Mexico;

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  • 正文语种 eng
  • 中图分类 晶体学;
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