- 著者
- Fumio SAWA Manwal HUSSAIN Atsushi NAKAHIRA Shigehiro NISHIJIMA Koichi NIIHARA Toichi OKADA
- 出版者
- CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN
- 雑誌
- TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) (ISSN:03892441)
- 巻号頁・発行日
- vol.30, no.9, pp.415-419, 1995-09-25 (Released:2010-02-26)
- 参考文献数
- 9
- 被引用文献数
- 1
Hybrid materials involving epoxies with different numbers of reactive groups have been prepared to determine the molecular design of epoxies with high fracture toughness at cryogenic temperatures. To answer the opponent demands, that is, strong and flexible chains, hybrid materials were proposed. Two types of epoxy resin with different numbers of epoxy groups were mixed and cured by changing the mixing ratio. Fracture toughness, flexural strength, dielectric loss tangent, and thermal contraction of the hybrid epoxy resins were measured down to cryogenic temperatures. A hybrid material with high fracture toughness, even at liquid helium temperature, was successfully developed and hence the molecular design orientation was confirmed to be possible.
- 著者
- Atsushi Nakahira Yasuyuki Sasaki Hidekazu Hirai Toshihiro Fukui Manabu Motoki Yosuke Takahashi Hiroki Oe Toru Kataoka Shigefumi Suehiro
- 出版者
- The Japanese Circulation Society
- 雑誌
- Circulation Journal (ISSN:13469843)
- 巻号頁・発行日
- vol.71, no.12, pp.1996-1998, 2007 (Released:2007-11-25)
- 参考文献数
- 7
- 被引用文献数
- 18 22
Aneurysmal circumflex coronary artery (Cx) with fistulous connection to the coronary sinus is a rare clinical entity that usually remains asymptomatic until later in life, so the ideal therapeutic strategy is poorly defined. The timing of surgical treatment for asymptomatic patients is a big issue, and whether to leave or exclude the diffuse aneurysm in addition to ligation of the fistula is controversial, considering the native myocardial circulation. Complete surgical repair, including exclusion of a diffusely aneurysmal Cx and coronary revascularization to a graftable branch in the circumflex area combined with ligation of its fistula, is quite challenging and sometimes fatal because of a broad posterolateral myocardial infarction without revascularization caused by a lack of graftable branches. A case of diffuse aneurysmal Cx, which ruptured into the left atrium after surgical ligation of its fistulous connection to the coronary sinus, is presented. Simple ligation of the fistula, leaving a gigantic aneurysmal circumflex artery, is hazardous for later rupture and should be avoided. Therapeutic strategies for this complex disorder are discussed, including the optimal timing of surgical treatment. (Circ J 2007; 71: 1996 - 1998)