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地球生命起源的最新研究成果

7788 / by: 传诗雷特 / 发布:2015年12月17日 / 22次阅读 / 暂无评论
标签:生命起源   / 最后修改时间: 2016-04-11 17:27:42

7788 / 2015年12月17日 / 22次阅读 / 标签:生命起源  


地球生命起源的最新研究成果

地球生命起源的最新研究成果宣称,生命完全可以就在地球上自己产生。下文英文部分在网络上看到的发布日期是2015年03月19日。

 

Chemists claim to have solved riddle of how life began on Earth

化学家声称他们已经解决了地球上生命起源之谜

A team of chemists working at the MRC Laboratory of Molecular Biology, at Cambridge in the UK believes they have solved the mystery of how it was possible for life to begin on Earth over four billion years ago. In their paper published in the journal Nature Chemistry, the team describes how they were able to map reactions that produced two and three-carbon sugars, amino acids, ribonucleotides and glycerol—the material necessary for metabolism and for creating the building blocks of proteins and ribonucleic acid molecules and also for allowing for the creation of lipids that form cell membranes.

在英国剑桥大学分子生物学MRC实验室工作的一组化学家相信他们已经解决了生命是如何在40亿年前的地球上开始的谜题。在他们发表在《自然化学》杂志上的论文中,他们介绍了他们是如何通过化学反应生产二碳糖,和三碳糖,各种氨基酸,核苷酸,以及有机甘油,这些物质都是必要的用于新陈代谢,以及生产蛋白质和核糖核酸分子,同时也可用于构建形成细胞膜的油脂。

Scientists have debated for years the various possibilities that could have led to life evolving on Earth, and the arguments have only grown more heated in recent years as many have suggested that it did not happen here at all, instead, it was brought to us from comets or some other celestial body. Most of the recent debate has found scientists in one of three chicken-or-the-egg first camps: RNA world advocates, metabolism-first supporters and those who believe that cell membranes must have developed first.

科学家就地球生命起源的各种可能性讨论了很多年,这些讨论在最近几年持续升温,这是因为很多人认为生命起源完全不是发生在地球上的,而是通过彗星或者其它天外物体带来的(美国有几部涉及到此问题的科幻电影,有一部的名字好像叫《火星任务》,还有一部被称为异性前传,叫《普罗米修斯》)。大部分参与讨论的科学家可以划分成三个先有鸡还是先有蛋的阵营:RNA支持者;新陈代谢优先的支持者;细胞膜优先发展理论的支持者。

The chemists with this new effort believe they have found a way to show that all three arguments are both right and wrong—they believe they have found a way to show that everything necessary for life to evolve could have done so from just hydrogen sulfide, hydrogen cyanide and ultraviolet light and that those building blocks could have all existed at the same time—in their paper, they report that using just those three basic ingredients they were able to produce more than 50 nucleic acids—precursors to DNA and RNA molecules. They note that early meteorites carried with them ingredients that would react with nitrogen already in the atmosphere, producing a lot of hydrogen cyanide. By dissolving in water, it could have very easily come into contact with hydrogen sulfide, while being exposed to ultraviolet light from the sun. And that, they claim, would have been all that was needed to get things going.

完成新发现的这些化学家们认为以上三种理论都同时正确和错误,他们相信,他们发现了一个方法说明一切生命进化需要的物质,都可以只通过氢硫化物,氢氰化物,以及紫外线,这几种同时存在的东西来构建,在他们的论文中,他们说只用这三种基本物质,就可以制造出超过50种不同的核酸----产生DNA和RNA的前期物质。他们说,早期的携带这些物质的陨星可以跟大气中的氮发生反应,产生很多氢氰化物。通过在水中分解,这些氢氰化物可以非常容易的与氢硫化物发生反应,同时又暴露在太阳的紫外线下面。就是这样,他们宣称,就可以让生命开始。

地球生命起源的最新研究成果

地球生命起源的最新研究成果

The findings by the team are sure to garner a great deal of interest in the scientific community and others will no doubt be testing and commenting on their findings. If what they claim passes muster, their work will likely be remembered as one of the great achievements of our time.

这个团队的发现必然会引起科学界的极大的兴趣,其它科学家毫无疑问会对他们的发现进行测试和评论。如果他们的宣称符合要求,他们的工作成果将会很可能被誉为我们这个时代伟大的成就之一。

 

注意:生命起源与人类起源不一样,人类并不是地球上唯一的生命体。

本文固定链接:http://www.maixj.net/misc/shengming-qiyuan-9925
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