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Masatoh Takahashi,Kazuo Ogura,Hiroyuki Yoshimura,Hiroshi Iiduka,Akira Sugawara,Kiyoyuki Yambe,김원섭 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.61
Experimental studies of coaxial oversized backward wave oscillators (BWOs) are presented. The beam voltage is weakly relativistic less than 100 kV. The slow-wave structure (SWS) consists of a rectangularly corrugated oversized hollow waveguide and rectangularly corrugated inner conductor, whose target operating frequency due to Cherenkov interaction is in the K-band. The coaxial SWS can have two surface waves caused by the inner and outer corrugations. The oversized BWO operations under the influences of two surface waves are examined. An oscillation starting voltage decreases by introducing the rectangularly corrugated inner conductor. Output powers increase greatly as compared with those without the corrugated inner conductor. The inner corrugation improves the oversized BWO operation
Nakata, Kazue,Taniguchi, Yoshie,Yoshioka, Noriko,Yoshida, Aya,Inagawa, Hiroyuki,Nakamoto, Takeru,Yoshimura, Hiroshi,Miyake, Shin-Ichiro,Kohchi, Chie,Kuroki, Masahide,Soma, Gen-Ichiro The Korean Nutrition Society 2011 Nutrition Research and Practice Vol. No.
At present, lifestyle-related diseases are one of the most critical health issues worldwide. It has been reported that lipopolysaccharide derived from a Gram-negative bacteria (IP-PA1) symbiotic with wheat exhibited several advantageous biological effects, such as the reduction of plasma glucose levels in NOD mice and low-density lipoprotein (LDL) levels in WHHL rabbits. In this study, the beneficial effects on plasma glucose and lipids of a tea (SI tea) consisting of IP-PA1 and Salacia (which contains an inhibitor of ${\alpha}$-glucosidase) were investigated in the KK-Ay/TaJcl type 2 diabetic model mice and in human subjects with premetabolic syndrome in a double-blind, randomized study. S1 tea significantly decreased plasma glucose levels in KK-Ay/TaJcl mice. A clinical trial of SI tea was performed with 41 subjects between the ages of 40 and 69, who belonged either to a high plasma glucose group (HG: FPG 100-125 mg/dl) or to a hyperlipidemia group (HL: TG ${\geq}$ 150 mg/dl, or LDL ${\geq}$ 120 mg/dl, or HDL <40 mg/dl). These subjects ingested either Salacia without IP-PA1 (the control) or SI tea. Blood samples were collected at 0, 30, and 60 days after initiating SI tea treatment, and were measured for FPG, HbA1c, TG, LDL, and HDL. These results showed that SI tea reduced FPG and HbA1c more rapidly than the control in the HL group, and also significantly improved LDL and HDL levels in the HG group. Thus, SI tea may be helpful in preventing lifestyle-related diseases.