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Ben, Goichi,Kihara, Yuichi,Nakamori, Keita,Aoki, Yoshio The Korean Society for Composite Materials 2007 Advanced composite materials Vol.16 No.4
Disposing of conventional fiber-reinforced polymers (FRPs) poses an environmentally challenging problem. Disposal of FRPs by combustion discharges carbon dioxide in the air because the resin of FRPs is made of fossil fuel. When they are disposed of in the ground, FRPs remain semipermanently without decomposing. In response to these problems, green composites are now being developed and are extensively studied as a material that produces a lower environmental burden. In this paper, green composites using kenaf fiber yarn bundles and PLA (poly(lactic acid)) are fabricated and their tensile properties are evaluated in the experiment. The tensile Young's modulus of all of the laminations is larger than that of PLA alone and the tensile strength of some laminations is larger than that of PLA alone. In particular, the value of UD composite of $0^{\circ$ shows double the tensile strength of PLA alone. Furthermore, the molding conditions for fabricating with a hot press are investigated and the heat resistant tensile properties of green composites are also reported.
Isolated Right Ventricular Apical Hypoplasia: A Case Report with 18 Years of Follow Up
Oya Takashi,Kitagawa Kakuya,Kokawa Takanori,Nakajima Hiroshi,Nakamori Shiro,Ogihara Yoshito,Nakata Kei,Ishida Masaki,Ichikawa Yasutaka,Sakuma Hajime 아시아심장혈관영상의학회 2021 Cardiovascular Imaging Asia Vol.5 No.2
Isolated right ventricular (RV) hypoplasia is a rare congenital anomaly in which the apical trabecular component of the ventricle fails to develop. In severe forms of isolated RV hypoplasia, patients usually develop cyanosis early in life and require prompt surgical intervention. Mild forms, however, can be asymptomatic until the development of severe tricuspid regurgitation due to annular dilatation. We report a 50-year-old woman with isolated RV apical hypoplasia who presented to our hospital 18 years ago and was followed with serial imaging studies.