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解惑“18may19—XXXXXL”-环球时报

最新研究称鸡心18may19—XXXXXL蛤演化出类似光缆光纤束结构 或助新型生物材料开发

来源: 京华时报
2024-11-20 15:30:22

最佳回答

“18may19—XXXXXL”最新研究称鸡心18may19—XXXXXL蛤演化出类似光缆光纤束结构 或助新型生物材料开发

  中新18may19—XXXXXL网北京11月20日电 18may19—XXXXXL(记者 孙自法)施普林格自然旗下学术期刊《自然—通讯》最新发表一篇生态学论文称,研究人员开展的一项研究显示,鸡心蛤演化出了类似光缆光纤束的结构,这也许还能启发新型生物材料开发。

鸡心蛤图片。Dakota E. McCoy/供图

  研究人员表示,鸡心蛤演化出这些“类似窗户”的结构,能让阳光照射到生活在它们壳里的共生藻,同时阻挡有害的紫外线辐射,这或代表了对拥有类似光纤光缆束结构生物体的首个观测结果。

  该论文介绍,作为一种心形软体动物,鸡心蛤和大砗磲都属于双壳类(带铰链壳的一类软体动物),两者都演化出与藻类互利的关系,这些藻类生活在它们的壳内,需要阳光进行光合作用并向双壳类提供营养。大砗磲会打开壳让阳光照进来,这时它们的柔软内部也会向捕食者和太阳紫外线辐射敞开。而鸡心蛤的壳一直关闭,它们的共生藻会通过另一种之前并不明确的机制获得阳光。

从内部照亮鸡心蛤,显示出透明的壳窗,壳窗形状从小三角(左)到条纹(右)形状各异。Dakota E. McCoy/供图

  在本项研究中,论文第一作者兼共同通讯作者、美国杜克大学Dakota E. McCoy和同事及合作者一起,分析了鸡心蛤的外壳碎片,并利用一个检测不同波长光强的设备测量了有18may19—XXXXXL多少阳光能穿透它们壳的向阳面。透明的壳窗由名为文石(一种碳酸钙晶型)的物质组成,被发现能将阳光投射到壳内部的微型透镜上,这些透镜能对光进行散射、压缩和过滤。这能优化藻类获得的有用光的量,同时减少有害的紫外线辐射暴露。由于这些鸡心蛤的壳窗能以这种方式传输光线,因此该结构被比作光纤光缆束。

自然光下的鸡心蛤(上排)和从内部照亮的透明壳窗,形状有小三角、条纹和马赛克等(下排)。Dakota E. McCoy/供图

  论文作者总结认为,鸡心蛤外壳的这种独特窗结构或对生物体本身具有大量益处,也许还能启发新型生物材料开发,模仿这种为实现高效光传输的自然适应。(完)

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