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The Role of Heat Shock Response in Insulin Resistance and Diabetes
Tatsuya Kondo,Hiroyuki Motoshima1,Motoyuki Igata,Junji Kawashima,Takeshi Matsumura,Hirofumi Kai,Eiichi Araki 대한당뇨병학회 2014 Diabetes and Metabolism Journal Vol.38 No.2
The expansion of life-style related diseases, such as metabolic syndrome (MS) and type 2 diabetes mellitus (T2DM), appears to be unstoppable. It is also difficult to cease their complications in spite of many antidiabetic medications or intervention of public administration. We and our collaborators found that physical medicine using simultaneous stimulation of heat with mild electric current activates heat shock response, thereby reducing visceral adiposity, insulin resistance, chronic inflammation and improving glucose homeostasis in mice models of T2DM, as well as in humans with MS or T2DM. This combination therapy exerts novel action on insulin signaling, β-cell protection and body compositions, and may provide a new therapeutic alternative in diabetic treatment strategy.
Keisuke Ohdaira,Hiroyuki Takemoto,Takuya Nishikawa,Hideki Matsumura 한국물리학회 2010 Current Applied Physics Vol.10 No.3
Polycrystalline silicon (poly-Si) films formed by flash lamp annealing (FLA) of precursor a-Si films are found to hardly lose hydrogen (H) atoms during crystallization and keep the initial H concentration on the order of 1021/㎤. Short annealing duration and sufficient Si film thickness would lead to the suppression of H desorption. A characteristic lateral crystallization mechanism, referred to as explosive crystallization (EC), may also contribute to the prevention of H desorption due to rapid lateral heat diffusion into neighboring a-Si. Poly-Si films after annealing under N2 or forming gas ambient shows remarkably long minority carrier lifetime compared to untreated films, indicating effective defect termination by H atoms remaining in the poly-Si films.
( Masumi Hasegawa ),( Hiroyuki Okamura ),( Mami Murakawa ),( Kazutoshi Takeuchi ),( Keiichi Yamada ),( Kiyotaka Uchikura ),( Noriyuki Harada ),( Junji Matsumura ) 한국목재공학회 2019 한국목재공학회 학술발표논문집 Vol.2019 No.1
Some fire-retardant woods with no documented fire performance have occasionally been sold in the market. It is important to know whether the required amount of chemical fire retardant is present in all sections of a wood sample. In this study, nondestructive measurement of chemical retention in fire-retardant treated wood was experimentally investigated using air-coupled ultrasonic and micro focus X-ray computed tomography. Wood samples were impregnated with different chemical concentrations. First, the ultrasonic wave velocities of wood samples were measured before and after impregnation. The percent changes in velocity exhibited a positive correlation with the chemical retention. Second, the images of wood sample were captured using X-ray CT before and after impregnation. The changes in integrated brightness values calculated from the captured images also showed a positive correlation with the chemical retention at a 1% significance level. These findings suggest that it is possible to evaluate the distributions of chemical retention in fire-retardant wood.