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The (γSF) Method - Determination of Radiative Neutron Capture Cross Sections for Unstable Nuclei
H. Utsunomiya,S. Goriely,H. Akimune,H. Harada,F. Kitatani,S. Goko,H. Toyokawa,K. Yamada 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
An indirect method of determining radiative neutron-capture cross sections for unstable nuclei which we refer to as the γ-ray strength function (γSF) method is outlined and applied to Zr and Sn isotopes. Photoneutron cross sections for ^(91,92,94,96)Zr and ^(117,116)Sn near neutron threshold show the presence of extra γ-ray strengths known as giant M1 and pygmy E1 resonances on top of the low-energy γSF of GDR. Based on the γSF method, we present (n,γ) cross sections for two radioactive nuclei, a long-lived fission product, ^(93)Zr with T^(1/2) = 1.5 × 10^6 y and an s-process branching point nucleus, ^(95)Zr with T^(1/2) = 64.0 d.
Flavobacterium meningosepticum 이 생산하는 peroxidase 의 분리정제 및 특성
양한철,최양문,Koga, S,Shimizu, S,Yamada, H 한국농화학회 1991 Applied Biological Chemistry (Appl Biol Chem) Vol.34 No.4
Peroxidase는 식물체에 널리 분포되어 있으며, 특히 horseradish에 많이 존재하고 있으나 미생물로부터 peroxidase의 생산은 거의 알려져 있지 않다. 토양으로부터 peroxidase를 생산하는 F, meningoseptium을 분리하였으며 분리균이 생산하는 intracellular enzyme을 DEAE-sephacel, phenyl-Sepharose CL-4B, Sephacryl S-300을 거쳐 효소를 분리 정제하여 효소의 특성을 검토하였다. Peroxidase의 native molecular weight는 220,000이며, subunit의 M.W.은 54,000으로 추정되었다. 본 효소는 pH 5.0-7.0, 50℃ 이하의 온도에서 안정성을 나타내었다.
Lin, W.,Byrne, T.B.,Kinoshita, M.,McNeill, L.C.,Chang, C.,Lewis, J.C.,Yamamoto, Y.,Saffer, D.M.,Casey Moore, J.,Wu, H.Y.,Tsuji, T.,Yamada, Y.,Conin, M.,Saito, S.,Ito, T.,Tobin, H.J.,Kimura, G.,Kanagaw Elsevier Scientific Publishing Co 2016 Tectonophysics Vol.692 No.2
<P>To better understand the distribution of three dimensional stress states in the Nankai subduction zone, southwest Japan, we review various stress-related investigations carried out in the first and second stage expeditions of the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) by the Integrated Ocean Drilling Program (IODP) and compile the stress data. Overall, the maximum principal stress sigma(l) in the shallower levels (<similar to 1 km) is vertical from near the center of forearc basin to near the trench and; the maximum horizontal stress S-Hmax (interpreted to be the intermediate principal stress sigma(2)) is generally parallel to the plate convergence vector. The exception to this generalization occurs along the shelf edge of the Nankai margin where S-Hmax, is along strike rather than parallel to the plate convergence vector. Reorientation of the principal stresses at deeper levels (e.g., >similar to 1 km below seafloor or in underlying accretionary prism) with sigma(1) becoming horizontal is also suggested at all deeper drilling sites. We also make a comparison of the stress state in the hanging wall of the frontal plate-interface between Site C0066 in the Nankai and Site C0019 in the Japan Trench subduction zone drilled after the 2011 Mw 9.0 Tohoku-Oki earthquake. In the Japan Trench, a comparison between stress state before and after the 2011 mega-earthquake shows that the stress changed from compression before the earthquake to extension after the earthquake. As a result of the comparison between the Nankai Trough and Japan Trench, a similar current stress state with trench parallel extension was recognized at both C0006 and C0019 sites. Hypothetically, this may indicate that in Nankai Trough it is still in an early stage of the interseismic cycle of a great earthquake which occurs on the decollement and propagates to the toe (around site C0006). (C) 2015 Elsevier B.V. All rights reserved.</P>
Association of a polymorphism of BTN2A1 with myocardial infarction in East Asian populations
Yamada, Y.,Nishida, T.,Ichihara, S.,Sawabe, M.,Fuku, N.,Nishigaki, Y.,Aoyagi, Y.,Tanaka, M.,Fujiwara, Y.,Yoshida, H.,Shinkai, S.,Satoh, K.,Kato, K.,Fujimaki, T.,Yokoi, K.,Oguri, M.,Yoshida, T.,Watanab Elsevier Scientific Publ. Co 2011 Atherosclerosis Vol.215 No.1
Objective: We have performed a genome-wide association study (GWAS) to identify genetic variants that confer susceptibility to myocardial infarction (MI) in Japanese and Korean populations. Methods: A total of 17,447 Japanese or Korean individuals from four independent subject panels was examined. Japanese subject panels A, B, and C comprised 134 individuals with MI and 137 controls, 1431 individuals with MI and 3161 controls, and 643 individuals with MI and 1347 controls, respectively, whereas the Korean population comprised 1880 individuals with MI and 8714 controls. A GWAS for MI was performed in Japanese subject panel A with the use of the Affymetrix GeneChip Human Mapping 500K Array Set. Results: Seventy single nucleotide polymorphisms (SNPs) significantly (P<1.0x10<SUP>-7</SUP>) associated with MI by the GWAS were examined further in Japanese subject panel B, revealing two SNPs (rs6929846 of BTN2A1, rs2569512 of ILF3) to be significantly (P<0.0007) associated with MI. The rs6929846 SNP of BTN2A1, but not rs2569512 of ILF3, was also significantly associated with MI in Japanese subject panel C. However, the association of neither rs6929846 nor rs2569512 with MI was replicated in the Korean population. Conclusion: BTN2A1 may be a susceptibility gene for MI in Japanese individuals.
Yamada, M.,Oeda, A.,Jung, J.,Iijima, M.,Yoshimoto, N.,Niimi, T.,Jeong, S.Y.,Choi, E.K.,Tanizawa, K.,Kuroda, S. Elsevier Science Publishers 2012 Journal of controlled release Vol.160 No.2
A bio-nanocapsule (BNC) is a hollow nanoparticle consisting of an approximately 100-nm-diameter liposome with about 110 molecules of hepatitis B virus (HBV) surface antigen L protein embedded as a transmembrane protein. BNC can encapsulate various drugs and genes and deliver them specifically to human hepatic cells based on the ability of HBV to recognize human hepatocyte, which is integrated in the N-terminal region of L protein. However, it is elusive whether the cellular attachment and entry into hepatic cells of BNC utilize the early infection mechanism of HBV. In this study, we have found that while all human hepatic cells show distinct affinities for BNC compared to non-hepatic cells, primary hepatocytes shows the highest efficiency for cellular binding and incorporation of BNC. Amounts of BNCs bound weakly and strongly to cell membranes and those entered into the cells varied significantly depending on the types of human hepatic cells. The weak and strong binding modes of BNC are likely mediated through binding to two distinct HBV receptors (heparin-mediated low-affinity and unidentified high-affinity receptors), which play major roles in the early infection mechanism of HBV. The rates of cellular uptake of BNC are similar to those reported for HBV. The BNCs incorporated into the cells are swiftly sorted to either early endosomes or macropinosomes and then to late endosomes and/or lysosomes. These findings strongly suggest that BNC is bound to and incorporated into human hepatic cells according to the early infection mechanism of HBV.
PRACTICAL ACTIVE POWER FILTERS USING SI-THYRISTORS
S.ATOH,T.SHIOTA,T.YAMADA,S.ARAKI,M.KOHATA 전력전자학회 1989 ICPE(ISPE)논문집 Vol.- No.-
We have developed a practical active power filters using SI(Static Induction)-Thyristors, a self-turn-off device excellent in high speed switching characteristics. This active filter was applied to VVVF inverter-driven water distribution system and has operated in the best conditions since the end of the last year. The active filter we have developed uses the compensating algorithm based on the instantaneous spatial vector theory and achieves nig11 speed and high accuracy controls by performing the on-line arithmetic operation with a digital signal processor. As for compensating performances suppression effects within 2% have been a-chieved as compared with the fundamental components at the 5th to 19th harmonics components of inverter current contained in the input current of inverter system.<br/>