Recent advances in nacre used as bone implant are reviewed in this paper 摘要珍珠层是一种天然的纳米生物陶瓷材料,一直是生物矿物材料学者研究的焦点。
It is likely that nacre will become a good candidate for bone graft substitution in future 认为珍珠层是一种很有前途的骨植入材料,提出了今后研究的方向。
The research present situation and advancement of growth structure of nacreous layer are discussed 对珍珠层生长结构的研究现状与发展趋势予以了综述和讨论。
This effect is created when light reflects off the many layers of tiny calcium carbonate crystals that compose the pearl 珍珠是由一层层厚约0 . 3 0 . 4m的珍珠层组成的。
When selecting a pearl , consider that the larger the pearl , the more nacre it has , so it will also exhibit even more luster 这些珍珠层是平行的,剖面呈同心圆结构。每一珍珠层都十分光滑,而且是半透明的。
Akoya , tahitian , and south sea pearls found in jewelery have a tendency to be the roundest , while freshwater pearls can be oval or slightly off - round 因此,在每一珍珠层,都会有部分光线被反射,也有一部分光线被折射,还有一部分光线会穿过珍珠。
Time passed . layers of the pearl had come off . the sand returned to himself . he felt he was very pure , now he was able to meet his sand 又是一个漫长。珍珠层已经被剥离得没有了,砂粒又露出了自己的本色,他觉得很干净,自己可以一尘不染地去见另一粒砂了。
The research indicates that the microscale spiral ( vortex ) growth dislocation is another important growth mechanism of pteria penguin and blister pearl from sanya , hainan province 通过对该珍珠层的表徵与示踪,初步证实微尺度螺旋(涡旋)生长位错是海南三亚企鹅贝及其附壳珍珠又一重要的生长机制。
2 ) the carotenoids successfully probed in nacre by in situ resonance raman spectra , are considered one of the most important factors responsible for the coloration of nacre and pearl 2 )采用共振拉曼光谱首次成功地原位探测到三角帆蚌及马氏珍珠贝珍珠层中类胡萝卜素的存在,并提出类胡萝卜素是珍珠层致色的重要原因之一。
A ceylon legend tells how the tears of adam and eve created a lake that gave birth to pearls - white or pink pearls from eve s tears , and the more precious and rarer gray and black pearls from adam s tears Mabe是一种半边珍珠,养殖于珍珠贝的内壁。半边形的珠核被贴置干白蝶珍珠贝的内壁,日积月累,珍珠层将珠核一层一层地包起来。