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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=54876&size=small" /></div> <h1 class="ph">怎么扭转衰老？太空生活或是一个关键途径 </h1> <p class="xg1"> 时间：2017-2-4 10:15<a class="zz" href="home.php?mod=space&uid=54876">作者：update</a> 阅读<em id="_viewnum">(702)</em> 评论: <a href="http://www.oecr.com/portal.php?mod=comment&id=5298&idtype=aid" title="查看全部评论"><em id="_commentnum">5</em></a></p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=58" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>怎么扭转衰老？太空生活或是一个关键途径。据外媒报道， 在国际空间站 (ISS) 生活了340天的美国宇航局（NASA）宇航员斯科特·凯利（Scott Kelly）可能变得更年轻了。</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><div> 怎么扭转衰老？太空生活或是一个关键途径。据外媒报道， 在国际空间站 (ISS) 生活了340天的美国宇航局（NASA）宇航员斯科特·凯利（Scott Kelly）可能变得更年轻了。NASA一直通过Scott和他的双胞胎兄弟马克·凯利（Mark Kelly）（退休宇航员）来研究太空环境对人体所产生的影响。Scott被送往太空，而Mark则留在地球上。 现在NASA的“太空——地球”对比实验有了一些令人震惊的发现。</div><div><br></div><div><p style="text-align: center;"><a href="data/attachment/portal/201702/04/101417uckha3ier4kaqwz4.jpg" target="_blank"><img src="data/attachment/portal/201702/04/101417uckha3ier4kaqwz4.jpg"></a></p></div><div><br></div><div> 端粒是存在于真核细胞线状染色体末端的一小段DNA-蛋白质复合体，能帮助修复受损的DNA。DNA分子每次分裂复制，端粒就缩短一点。随着年龄增加，端粒的长度逐渐缩短。 然而Scott在太空生活后，其端粒长度不但没有缩短，反而有所增长。辐射生物学家 Susan Bailey 表示：“这与我们想象的完全相反。”<span style="line-height: 1.8em;">由于宇航员在太空会承受更多的辐射，科学家原本以为宇航员端粒的缩短速度将更快。 但结果却与他们预想的完全相反。</span><span style="line-height: 1.8em;">科学家表示，在回到地球后，Scott Kelly的端粒再次开始缩短。</span></div><div><span style="line-height: 1.8em;"><br></span></div><div><p style="text-align: center;"><a href="data/attachment/portal/201702/04/101433axnjr37bbn3lwb37.jpg" target="_blank"><img src="data/attachment/portal/201702/04/101433axnjr37bbn3lwb37.jpg"></a></p><p style="text-align: center;"><br></p><p style="text-align: center;"><span style="line-height: 25.2px;">欢迎关注光电<a href="http://news.oecr.com" target="_blank" class="relatedlink">资讯</a>微信公众号，每天将由光电工程师<a href="http://club.oecr.com" target="_blank" class="relatedlink">社区</a>网站(oecr.com)编辑团队为您精选行业动态，科技资讯，技术解析，光电<a href="http://www.oecr.com/portal.php?mod=list&catid=62" target="_blank" class="relatedlink">科普</a>等精彩内容，欢迎交换友情链接</span><span style="line-height: 25.2px;">(</span><b style="line-height: 25.2px;"><a 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