Outcomes After Sirolimus- and Paclitaxel-Eluting Stent Implantation in Patients With Insulin-Treated Diabetes Mellitus
- 作者：Ashesh N. Buch ; Aamir Javaid ; Daniel H. Steinberg ; Probal Roy ; Tina L. Pinto Slottow ; Zhenyi Xue ; Kimberly Smith ; William O. Suddath ; Lowell F. Satler ; Kenneth M. Kent ; Augusto D. Pichard ; Ron Waksman
- 关键词：Rutile twin ;
//www.sciencedirect.com/scidirimg/entities/204e.gif" alt="greek small letter alpha" title="greek small letter alpha" border="0">-PbO2-type TiO2 ; Phase transformation ; Image simulation
- 刊名：The American Journal of Cardiology
- 出版年：2008
- 期刊代码：5_00029149
- 类别：med
- 出版时间：1 May 2008
- 卷：101
- 期：9
- 页码：1253-1258
- 文件大小：175 K
摘要
The presence of nano-scale lamellae of the 
-PbO2-type polymorph of TiO2 sandwiched between twinned rutile inclusions in jadeite has been confirmed by electron diffraction and high-resolution transmission electron microscopy, backed up by image simulation techniques, from ultrahigh-pressure jadeite quartzite at Shuanghe in the Dabie Mountains, China. The crystal structure is orthorhombic with lattice parameters a = 4.58 Å, b = 5.42 Å, c = 5.02 Å and space group Pbcn. A three-dimensional structural model has been constructed for the rutile to -PbO2-type TiO2 phase transformation based on high-resolution electron microscopic images. Computer image simulation and structural model analysis reveal that rutile {0 1 1}R twin interface is a basic structural unit of -PbO2-type TiO2. Nucleation of -PbO2-type TiO2 lamellae 1–2 nm thick is caused by the displacement of one half of the titanium cations within the {0 1 1}R twin slab. This displacement reduces the Ti–O–Ti distance and is favored by high pressure.
-PbO2-type polymorph of TiO2 sandwiched between twinned rutile inclusions in jadeite has been confirmed by electron diffraction and high-resolution transmission electron microscopy, backed up by image simulation techniques, from ultrahigh-pressure jadeite quartzite at Shuanghe in the Dabie Mountains, China. The crystal structure is orthorhombic with lattice parameters a = 4.58 Å, b = 5.42 Å, c = 5.02 Å and space group Pbcn. A three-dimensional structural model has been constructed for the rutile to -PbO2-type TiO2 phase transformation based on high-resolution electron microscopic images. Computer image simulation and structural model analysis reveal that rutile {0 1 1}R twin interface is a basic structural unit of -PbO2-type TiO2. Nucleation of -PbO2-type TiO2 lamellae 1–2 nm thick is caused by the displacement of one half of the titanium cations within the {0 1 1}R twin slab. This displacement reduces the Ti–O–Ti distance and is favored by high pressure.