摘要翻译:
我们用高分辨率技术证实了重叠珍珠层片之间存在矿物桥。在腹足类和头足类鹦鹉螺的塔状珍珠层中,有沿着塔轴排列的大桥,对应于层间膜的间隙(150-200纳米)。缝隙是由新生片剂与覆盖珍珠层隔层的表面膜相互作用产生的。在双壳贝类的层状珍珠层中,与层间膜的拉长间隙相关的桥(>100nm)主要存在于重叠的亲片边缘或附近。为了解释这种位置,我们假设,当钙化晚期,层间间隙变小时,层间膜由于渗透压力的差异而破裂。在任何情况下,叠加药片(<60纳米)之间的微小连接,早先报道的是矿物桥,都没有发现这种情况。
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英文标题:
《Mineral bridges in nacre revisited》
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作者:
Antonio G. Checa, Julyan H. E. Cartwright, Marc-Georg Willinger
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最新提交年份:
2012
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分类信息:
一级分类:Physics 物理学
二级分类:Biological Physics 生物物理学
分类描述:Molecular biophysics, cellular biophysics, neurological biophysics, membrane biophysics, single-molecule biophysics, ecological biophysics, quantum phenomena in biological systems (quantum biophysics), theoretical biophysics, molecular dynamics/modeling and simulation, game theory, biomechanics, bioinformatics, microorganisms, virology, evolution, biophysical methods.
分子生物物理、细胞生物物理、神经生物物理、膜生物物理、单分子生物物理、生态生物物理、生物系统中的量子现象(量子生物物理)、理论生物物理、分子动力学/建模与模拟、博弈论、生物力学、生物信息学、微生物、病毒学、进化论、生物物理方法。
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一级分类:Physics 物理学
二级分类:Materials Science 材料科学
分类描述:Techniques, synthesis, characterization, structure. Structural phase transitions, mechanical properties, phonons. Defects, adsorbates, interfaces
技术,合成,表征,结构。结构相变,力学性质,声子。缺陷,吸附质,界面
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一级分类:Physics 物理学
二级分类:Soft Condensed Matter 软凝聚态物质
分类描述:Membranes, polymers, liquid crystals, glasses, colloids, granular matter
膜,聚合物,液晶,玻璃,胶体,颗粒物质
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一级分类:Physics 物理学
二级分类:Adaptation and Self-Organizing Systems 自适应和自组织系统
分类描述:Adaptation, self-organizing systems, statistical physics, fluctuating systems, stochastic processes, interacting particle systems, machine learning
自适应,自组织系统,统计物理,波动系统,随机过程,相互作用粒子系统,机器学习
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一级分类:Quantitative Biology 数量生物学
二级分类:Other Quantitative Biology 其他定量生物学
分类描述:Work in quantitative biology that does not fit into the other q-bio classifications
不适合其他q-bio分类的定量生物学工作
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英文摘要:
We confirm with high-resolution techniques the existence of mineral bridges between superposed nacre tablets. In the towered nacre of both gastropods and the cephalopod Nautilus there are large bridges aligned along the tower axes, corresponding to gaps (150-200 nm) in the interlamellar membranes. Gaps are produced by the interaction of the nascent tablets with a surface membrane that covers the nacre compartment. In the terraced nacre of bivalves bridges associated with elongated gaps in the interlamellar membrane (> 100 nm) have mainly been found at or close to the edges of superposed parental tablets. To explain this placement, we hypothesize that the interlamellar membrane breaks due to differences in osmotic pressure across it when the interlamellar space below becomes reduced at an advanced stage of calcification. In no cases are the minor connections between superimposed tablets (< 60 nm), earlier reported to be mineral bridges, found to be such.
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PDF链接:
https://arxiv.org/pdf/1207.5025


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