中国科学家发现大熊猫牙齿的自我修复机制
文章来源:未知 文章作者:enread 发布时间:2019-01-16 06:24 字体: [ ]  进入论坛
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A group of researchers have recently found that giant pandas have particularly clever tooth enamel1, which can recover its structure and geometry to counteract2 early stages of damage.
 
一组研究人员近期发现,大熊猫有非常聪明的牙釉质,能恢复结构和几何性质抵消早期损伤。
 
The team, consisting of members from the Chinese Academy of Science (CAS), the University of Science and Technology of China, Lanzhou University of Technology, and the University of California Berkeley, believe that their observations could be utilized3 in the tooth enamel of all vertebrates, including humans, and inspire the design of artificial durable4 ceramics5.
 
Teeth are animals' natural weapons of attack and defense6 and tools for chewing food. Pandas are the representative animal with sharp teeth. Ninety-nine percent of their food is bamboo, and the teeth are the key for them to eat that food.
 
"The tooth enamel of giant pandas is capable of partially7 recovering its geometry and structure at nano- to microscale dimensions autonomously8 after deformation9 to counteract the early stage of damage," said Liu Zengqian, a professor from the Institute of Metal Research under the CAS and a member of the research team.
 
The ingenious design of the panda's tooth enamel allows it to withstand a daily diet of bamboo – a material of remarkable10 strength and toughness. When there is an impact on their enamel, a variety of different deformation mechanisms11 place to mitigate12 the growth of small cracks and prevent the formation of large cracks.
 
During the process, hydration plays a critical role. The presence of water decreases the width of any cracks that do form, with only a minor13 cost in terms of hardness.
 
"Tooth enamel possesses an exceptional durability14 and plays a key role in the function of teeth. However, it exhibits a remarkably15 low resistance to the initiation16 of large-scale cracks comparable to geological minerals," said Robert O. Ritchie, another researcher.


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1 enamel jZ4zF     
n.珐琅,搪瓷,瓷釉;(牙齿的)珐琅质
参考例句:
  • I chipped the enamel on my front tooth when I fell over.我跌倒时门牙的珐琅质碰碎了。
  • He collected coloured enamel bowls from Yugoslavia.他藏有来自南斯拉夫的彩色搪瓷碗。
2 counteract vzlxb     
vt.对…起反作用,对抗,抵消
参考例句:
  • The doctor gave him some medicine to counteract the effect of the poison.医生给他些药解毒。
  • Our work calls for mutual support.We shouldn't counteract each other's efforts.工作要互相支持,不要互相拆台。
3 utilized a24badb66c4d7870fd211f2511461fff     
v.利用,使用( utilize的过去式和过去分词 )
参考例句:
  • In the19th century waterpower was widely utilized to generate electricity. 在19世纪人们大规模使用水力来发电。 来自《简明英汉词典》
  • The empty building can be utilized for city storage. 可以利用那栋空建筑物作城市的仓库。 来自《简明英汉词典》
4 durable frox4     
adj.持久的,耐久的
参考例句:
  • This raincoat is made of very durable material.这件雨衣是用非常耐用的料子做的。
  • They frequently require more major durable purchases.他们经常需要购买耐用消费品。
5 ceramics 0a6d841bb40f677207869b9f856b3b21     
n.制陶业;陶器
参考例句:
  • an exhibition of ceramics by Picasso 毕加索陶瓷作品展
  • The ceramics bore the imprint of Luca della Robbia. 陶器上印有卢卡·德拉·罗比亚的字样。
6 defense AxbxB     
n.防御,保卫;[pl.]防务工事;辩护,答辩
参考例句:
  • The accused has the right to defense.被告人有权获得辩护。
  • The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。
7 partially yL7xm     
adv.部分地,从某些方面讲
参考例句:
  • The door was partially concealed by the drapes.门有一部分被门帘遮住了。
  • The police managed to restore calm and the curfew was partially lifted.警方设法恢复了平静,宵禁部分解除。
8 autonomously 7d7df118f987129bac059bd8fe8107ed     
adv. 自律地,自治地
参考例句:
  • To learn autonomously in the network environment is totally new to students. 基于网络环境下的自主学习对学生来说,是一种全新的学习方式。
  • The QC-RS can operate autonomously or by remote control. QC-RS能实现自动操作或通过遥控来操作。
9 deformation 59ryp     
n.形状损坏;变形;畸形
参考例句:
  • The deformation frequencies are not sufficiently distinctive.其变形频率不是十分明显的。
  • The calculated deformation is almost equal to the real situation by measurement.经检测,计算变形量与实际情况基本一致。
10 remarkable 8Vbx6     
adj.显著的,异常的,非凡的,值得注意的
参考例句:
  • She has made remarkable headway in her writing skills.她在写作技巧方面有了长足进步。
  • These cars are remarkable for the quietness of their engines.这些汽车因发动机没有噪音而不同凡响。
11 mechanisms d0db71d70348ef1c49f05f59097917b8     
n.机械( mechanism的名词复数 );机械装置;[生物学] 机制;机械作用
参考例句:
  • The research will provide direct insight into molecular mechanisms. 这项研究将使人能够直接地了解分子的机理。 来自《简明英汉词典》
  • He explained how the two mechanisms worked. 他解释这两台机械装置是如何工作的。 来自《简明英汉词典》
12 mitigate EjRyf     
vt.(使)减轻,(使)缓和
参考例句:
  • The government is trying to mitigate the effects of inflation.政府正试图缓和通货膨胀的影响。
  • Governments should endeavour to mitigate distress.政府应努力缓解贫困问题。
13 minor e7fzR     
adj.较小(少)的,较次要的;n.辅修学科;vi.辅修
参考例句:
  • The young actor was given a minor part in the new play.年轻的男演员在这出新戏里被分派担任一个小角色。
  • I gave him a minor share of my wealth.我把小部分财产给了他。
14 durability Orxx5     
n.经久性,耐用性
参考例句:
  • Nylons have the virtue of durability.尼龙丝袜有耐穿的优点。
15 remarkably EkPzTW     
ad.不同寻常地,相当地
参考例句:
  • I thought she was remarkably restrained in the circumstances. 我认为她在那种情况下非常克制。
  • He made a remarkably swift recovery. 他康复得相当快。
16 initiation oqSzAI     
n.开始
参考例句:
  • her initiation into the world of marketing 她的初次涉足营销界
  • It was my initiation into the world of high fashion. 这是我初次涉足高级时装界。
TAG标签: tooth enamel pandas
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