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Thermal conductivity of PLA-bamboo fiber composites
Takagi, Hitoshi,Kako, Shuhei,Kusano, Koji,Ousaka, Akiharu The Korean Society for Composite Materials 2007 Advanced composite materials Vol.16 No.4
'Green' composites were fabricated from poly lactic acid (PLA) and bamboo fibers by using a conventional hot pressing method. The insulating properties of the PLA-bamboo fiber 'green' composites were evaluated by determination of the thermal conductivity, which was measured using a hot-wire method. The thermal conductivity values were compared with theoretical estimations. It was demonstrated that thermal conductivity of PLA-bamboo fiber 'green' composites is smaller than that of conventional composites, such as glass fiber reinforced plastics (GFRPs) and carbon fiber reinforced plastics (CFRPs). The thermal conductivity of PLA-bamboo fiber 'green' composites was significantly influenced by their density, and was in fair agreement with theoretical predictions based on Russell's model. The PLA-bamboo fiber composites have low thermal conductivity comparable with that of woods.
The Processing and Mechanical Performance of Cellulose Nanofiber-based Composites
Nakagaito, Antonio Norio,Takagi, Hitoshi,Pandey, Jitendra Kumar Korean Society of Ocean Engineers 2011 International journal of ocean system engineering Vol.1 No.4
Nanocomposites based on cellulose nanofibers have been studied for a considerable time since its first introduction, however real applications seem to have hardly developed to these days. The high-strength of cellulose nanofibers suggests the potential to reinforce plastics to produce composites for semi-structural or even structural applications. This paper discusses some of the attempts to produce such high-strength nanocomposites and the main challenges that have to be overcome to bring them into commercial products.
Enhancement of Radioprotection and Anti-Tumor Immunity by Yeast-Derived β-Glucan in Mice
Yoshimi Niwano,Yasuyuki Takagi,Takashi Nakamura,Takeo Hasegawa,Ikukatsu Suzuki,Masami Oshima,Hitoshi Tawaraya,Yeun-hwa Gu 한국식품영양과학회 2005 Journal of medicinal food Vol.8 No.2
Intraperitoneal injection of .-glucan was shown to greatly delay mortality in mice exposed to whole-bodyX-ray radiation and tumor growth in tumor-bearing mice. Since the leukocyte and lymphocyte numbers were increased by asingle dose of .-glucan, the radioprotective effect of .-glucan is probably mediated, at least in part, by a hemopoietic actionin irradiated mice. In addition, both natural killer (NK) and lymphokine-activated killer (LAK) activities were significantlyincreased by repeated doses of .-glucan. Augmented immunological activity as seen in increased NK and LAK activity by .-glucan seems to play a role in preventing secondary infections associated with irradiation, and probably contributes to theattenuated tumor growth in tumor-bearing mice through enhanced anti-tumor immunity. These results suggest that .-glucanmay be a promising adjunct treatment for cancer patients receiving radiotherapy.
A comparison of mechanical property of jute/styrene composites by VARTM and hand lay-up methods
Yun-hae Kim,Hee-beom An,Hitoshi Takagi,Dong-hun Yang,Kyung-man Moon 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6
This paper shows the mechanical property between the VARTM (Vacuum Assisted Resin Transfer Molding) system and hand lay-up methods for jute/styrene composites. The jute fiber made by woven as a reinforcement in composites was produced from Indonesia. Resin content of jute fiber reinforced composites made by hand lay-up method is higher than that of jute fiber reinforced composites made by VARTM. And