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Yuanxia Sun,Yupin Guan,Shigeru Hayakawa,Masahiro Ogawa,Supaporn Naknukool,Yoshiyuki Matsumoto 한국식품과학회 2011 Food Science and Biotechnology Vol.20 No.2
Solid wastes of freshwater clam in food processing, including mainly mantle, were used as a raw material for the recovery of bioactive peptides related to angiotensin I-converting enzyme (ACE) inhibitor. Among the primary hydrolysates of dried mantle (DM), the peptides corresponding to hydrolysates using 2 crude peptidases exhibited a strong ACE inhibitory activity (IC_50, 0.23 mg/mL), and recovery efficiency of soluble materials and their protein content were considerably large with 42.65% and 468.6 mg/g, respectively. The ACE inhibitory activity of all secondary hydrolysates digested by pepsin and trypsin was significantly increased as compared to primary hydrolysates. Furthermore, the peptic secondary hydrolysates were fractionated by gel filtration and reverse phase-HPLC (RP-HPLC) and characterized by matrix-assisted laser desorption-ionization time of flight/mass spectrometry (MALDI-TOF/MS). These peptides with molecular weight of less than 1 kDa possessed the stronger ACE inhibitory effect, and their inhibitory pattern was found to be competitive. The results showed that the DM hydoplysates might be utilized as a rich source of bioactive peptide.
The Influence of Moodle on Students` Expressing Themselves in English Classes
( Yuka Kawasaki ),( Noritaka Tomimura ),( Kazuaki Ichizaki ),( Shigeru Ogawa ),( Hironori Sasaki ) 한국교육공학회 2014 한국교육공학회 학술대회발표자료집 Vol.2014 No.2
This study examines the effects that different methods of presenting comments or answering teacher``s questions in class have on student``s voluntary participation in classroom activities. We observed three English classes, Class 1 and Class 2, for six weeks, April through May in 2014, and Class 3 for six weeks, October through November in 2013, at a school in Hiroshima, Japan, and counted how often students gave their comments or their answers voluntarily. This school has a five year engineering course and a two-year advanced engineering course corresponding to the 10th grade through the senior year in college. The students are all engineering majors. In Class 1 and Class 2, a well-known hand-raising method was used. The students in these two classes raised their hands and gave answers or comments when their teachers asked a question or asked them to give comments. In contrast, in Class 3, a writing method with the forum module of Moodle was used. The students in this class wrote their comments in Japanese about their classmates`` presentations in English. We counted the number of students who gave answers or comments during the observation period, and calculated the ratio to the total number of students who didn``t give answers or comments at all in each class. Class 1, Class 2, and Class 3 had 29%, 15%, and 0% of non-active students, respectively. This result suggests that some students hesitate to give their comments voluntarily in a spoken format, but not in a written format using Moodle. In other words, in order to enhance students`` active participation in the classroom, we should first instruct non-active students to give their comments in a written format, and then guide them to an oral format. Moodle will be a very helpful tool to pursue this instruction.
Low-speed Wake Analysis of Supersonic Biplane
Shuichi Ozaki,Masahito Yonezawa,Naoshi Kuratani,Toshihiro Ogawa,Shigeru Obayashi,Takashi Matsuno,Hiromitsu Kawazoe 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
This study was focused on the profile drag estimation from the wake survey of the now field with the wind tunnel testing. The experimental investigation was conducted with the low turbulence wind tunnel to estimate the profile drag coefficient of the supersonic biplane from the pressure loss in the wake of the model. The surveys were conducted behind the supersonic biplane model whose airfoil could realize the shock wave cancellation at design Mach number 1.7. The two-dimensional CFD simulations were also conducted to compare with the experimental results. The reduction of the test data by Jones equation gave the profile drag coefficients agreed with those obtained from the CFD simulations at zero lift conditions. However, at lifting conditions. the experimental results and the CFD results didn't agree. In this study, the profile drag characteristics of the supersonic biplane were discussed based on these results.