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Plausibility of the Formose Reaction in Alkaline Hydrothermal Vent Environments.
Origins of Life and Evolution of Biospheres ( IF 2 ) Pub Date : 2020-08-04 , DOI: 10.1007/s11084-020-09599-5
Arthur Omran 1
Affiliation  

Prebiotic processes required a reliable source of free energy and complex chemical mixtures that may have included sugars. The formose reaction is a potential source of those sugars. At moderate to elevated temperature and pH ranges, these sugars rapidly decay. Here it is shown that CaCO3-based chemical gardens catalyze the formose reaction to produce glucose, ribose, and other monosaccharides. These thin inorganic membranes are explored as analogs of hydrothermal vent materials—a possible place for the origin of life—and similarly exposed to very steep pH gradients. Supported by simulations of a simple reaction-diffusion model, this study shows that such gradients allow for the dynamic accumulation of sugars in specific layers of the thin membrane, effectively protecting formose sugar yields. Therefore, the formose reaction may be a plausible prebiotic reaction in alkaline hydrothermal vent environments, possibly setting the stage for an RNA world.



中文翻译:

碱性热液喷口环境中甲醛反应的合理性。

益生元过程需要可靠的自由能源和可能包含糖的复杂化学混合物。甲糖反应是这些糖的潜在来源。在中等至升高的温度和 pH 范围内,这些糖会迅速分解。这里表明,基于CaCO 3的化学花园催化甲醛反应产生葡萄糖、核糖和其他单糖。这些无机薄膜被探索为热液喷口材料的类似物(生命起源的可能场所),并且同样暴露于非常陡峭的 pH 梯度。在简单反应扩散模型模拟的支持下,这项研究表明,这种梯度允许糖在薄膜的特定层中动态积累,从而有效地保护甲醛糖的产量。因此,formose反应可能是碱性热液喷口环境中合理的益生元反应,可能为RNA世界奠定了基础。

更新日期:2020-08-04
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