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Supernovae Neutrinos and the Chirality of Amino Acids

机译:超新星中微子和氨基酸的手性

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摘要

A mechanism for creating an enantioenrichment in the amino acids, the building blocks of the proteins, that involves global selection of one handedness by interactions between the amino acids and neutrinos from core-collapse supernovae is defined. The chiral selection involves the dependence of the interaction cross sections on the orientations of the spins of the neutrinos and the 14N nuclei in the amino acids, or in precursor molecules, which in turn couple to the molecular chirality. It also requires an asymmetric distribution of neutrinos emitted from the supernova. The subsequent chemical evolution and galactic mixing would ultimately populate the Galaxy with the selected species. The resulting amino acids could either be the source thereof on Earth, or could have triggered the chirality that was ultimately achieved for Earth’s proteinaceous amino acids.
机译:定义了一种在氨基酸(蛋白质的组成部分)中产生对映体富集的机制,该机制涉及通过核塌陷超新星的氨基酸和中微子之间的相互作用来整体选择一种惯性。手性选择涉及相互作用截面与氨基酸或前体分子中的中微子自旋和 14 N核的自旋方向的依赖性,这又与分子手性相关。它还需要从超新星发射的中微子不对称分布。随后的化学演化和银河混合最终将使选定物种填充银河系。产生的氨基酸可能是其在地球上的来源,也可能触发了地球蛋白质氨基酸最终达到的手性。

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