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USING ORBITAL EFFECTS TO BREAK THE CLOSE/WIDE DEGENERACY IN BINARY-LENS MICROLENSING EVENTS
Shin, I.-G.,Sumi, T.,Udalski, A.,Choi, J. Y.,Han, C.,Gould, A.,Abe, F.,Bennett, D. P.,Bond, I. A.,Botzler, C. S.,Chote, P.,Freeman, M.,Fukui, A.,Furusawa, K.,Harris, P.,Itow, Y.,Ling, C. H.,Masuda, K. IOP Publishing 2013 The Astrophysical journal Vol.764 No.1
<P>Microlensing can provide an important tool to study binaries, especially those composed of faint or dark objects. However, accurate analysis of binary-lens light curves is often hampered by the well-known degeneracy between close (s < 1) and wide (s > 1) binaries, which can be very severe due to an intrinsic symmetry in the lens equation. Here, s is the normalized projected binary separation. In this paper, we propose a method that can resolve the close/wide degeneracy using the effect of a lens orbital motion on lensing light curves. The method is based on the fact that the orbital effect tends to be important for close binaries while it is negligible for wide binaries. We demonstrate the usefulness of the method by applying it to an actually observed binary-lens event MOA-2011-BLG-040/OGLE-2011-BLG-0001, which suffers from severe close/wide degeneracy. From this, we are able to uniquely specify that the lens is composed of K- and M-type dwarfs located similar to 3.5 kpc from the Earth.</P>
Inhibitory Effect of Sawa-wasabi (Wasabia japonica) on the Growth of Fish Pathogenicic Bacteria
SHIN, Il-Shik,MASUDA, Hideki,KINAE, Naohide 강릉대학교 동해안지역연구소 2000 東海岸硏究 Vol.11 No.2
In this study, the inhibitory effects of each extract from Sawa-wasabi root, stem and leaf on the growth of fish pathogenic bacteria were examined. All of them showed antibacterial activity against Vibrio hollisae, V. anguillarum, and Edwardsiella tarda, but weak effect against Staphylococcus captis. The Sawa-wasabi leaf showed the strongest antibacterial activity with minimal inhibitory concentrations (MICs) of 500 ppm against V. hollisae, V. anguillarum, and Edwardsiella tarda. The Sawa-wasabi root and stem showed same antibacterial activities with 1,000i 2,000 ppm against them. The minium bactericidal concentrations (MBCs) of all Sawa-wasabi extracts were same or two-fold higher than the MICs. Viewed in aspect of allyl isothiocyanate (AIT) amount contained in Sawa-wasabi, the MIC of leaf was correspondence to 58 μg/ml of AIT, which was concentration of about one to third of root with 185 μg/ml of AIT and also was concentration of about one to seventeenth authentic AIT with 1,000 μg/ml. These results suggest that several chemical components containing AIT in Sawa-wasabi are affective in controlling pathogenic bacteria in fish and have a potent therapeutic effect against disease induced by these bacteria.
Eisuke Miura,Shin-ichi Masuda,Takanori Ooyama,Satoshi Ishii 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1
The generation of quasi-monoenergetic electron beams containing more than 3 × 108 electrons in a monoenergetic peak for energies from 40 to 60 MeV has been demonstrated. The quasimonoenergetic electron beams have been obtained from a plasma with an electron density of 1.6 × 1019 cm−3 produced by an 8-TW, 50-fs Ti:sapphire laser pulse. It is necessary to control the plasma density precisely and to suppress the nanosecond prepulse with the main pulse for stable generation of quasi-monoenergetic beams. Two-dimensional particle-in-cell simulation results are also shown. The simulation result suggests that quasi-monoenergetic beam generation is brought about by matching the laser propagation length with the gas jet length.
Steric Effect on the Nucleophilic Reactivity of Nickel(III) Peroxo Complexes
Kim, Jalee,Shin, Bongki,Kim, Hyunjeong,Lee, Junhyung,Kang, Joongoo,Yanagisawa, Sachiko,Ogura, Takashi,Masuda, Hideki,Ozawa, Tomohiro,Cho, Jaeheung American Chemical Society 2015 Inorganic Chemistry Vol.54 No.13
<P>A set of nickel(III) peroxo complexes bearing tetraazamacrocyclic ligands, [Ni<SUP>III</SUP>(TBDAP)(O<SUB>2</SUB>)]<SUP>+</SUP> (TBDAP = <I>N</I>,<I>N</I>′-di-<I>tert</I>-butyl-2,11-diaza[3.3](2,6)pyridinophane) and [Ni<SUP>III</SUP>(CHDAP)(O<SUB>2</SUB>)]<SUP>+</SUP> (CHDAP = <I>N</I>,<I>N</I>′-dicyclohexyl-2,11-diaza[3.3](2,6)pyridinophane), were prepared by reacting [Ni<SUP>II</SUP>(TBDAP)(NO<SUB>3</SUB>)(H<SUB>2</SUB>O)]<SUP>+</SUP> and [Ni<SUP>II</SUP>(CHDAP)(NO<SUB>3</SUB>)]<SUP>+</SUP>, respectively, with H<SUB>2</SUB>O<SUB>2</SUB> in the presence of triethylamine. The mononuclear nickel(III) peroxo complexes were fully characterized by various physicochemical methods, such as UV–vis, electrospray ionization mass spectrometry, resonance Raman, electron paramagnetic resonance, and X-ray analysis. The spectroscopic and structural characterization clearly shows that the NiO<SUB>2</SUB> cores are almost identical where the peroxo ligand is bound in a side-on fashion. However, the different steric properties of the supporting ligands were confirmed by X-ray crystallography, where the CHDAP ligand gives enough space around the Ni core compared to the TBDAP ligand. The nickel(III) peroxo complexes showed reactivity in the oxidation of aldehydes. In the aldehyde deformylation reaction, the nucleophilic reactivity of the nickel(III) peroxo complexes was highly dependent on the steric properties of the macrocyclic ligands, with a reactivity order of [Ni<SUP>III</SUP>(TBDAP)(O<SUB>2</SUB>)]<SUP>+</SUP> < [Ni<SUP>III</SUP>(CHDAP)(O<SUB>2</SUB>)]<SUP>+</SUP>. This result provides fundamental insight into the mechanism of the structure (steric)–reactivity relationship of metal peroxo intermediates.</P><P>A set of nickel(III) peroxo complexes, [Ni<SUP>III</SUP>(TBDAP)(O<SUB>2</SUB>)]<SUP>+</SUP> and [Ni<SUP>III</SUP>(CHDAP)(O<SUB>2</SUB>)]<SUP>+</SUP>, were prepared. The spectroscopic characterization clearly shows that the NiO<SUB>2</SUB> cores are almost identical. However, the different steric properties of the supporting ligands were confirmed by structural characterization. The nucleophilic reactivity of the nickel(III) peroxo complexes was highly dependent on the steric properties of the macrocyclic ligands, with a reactivity order of [Ni<SUP>III</SUP>(TBDAP)(O<SUB>2</SUB>)]<SUP>+</SUP> < [Ni<SUP>III</SUP>(CHDAP)(O<SUB>2</SUB>)]<SUP>+</SUP>.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/inocaj/2015/inocaj.2015.54.issue-13/acs.inorgchem.5b00294/production/images/medium/ic-2015-002943_0012.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ic5b00294'>ACS Electronic Supporting Info</A></P>
( Takayuki Furumatsu ),( Yuki Okazaki ),( Yuya Kodama ),( Yoshiki Okazaki ),( Yusuke Kamatsuki ),( Shin Masuda ),( Takaaki Hiranaka ),( Toshifumi Ozaki ) 대한슬관절학회 2019 대한슬관절학회지 Vol.31 No.1
Purpose: Posterior root repair of the medial meniscus (MM) can prevent rapid progression of knee osteoarthritis in patients with a MM posterior root tear (MMPRT). The anatomic reattachment of the MM posterior root is considered to be critical in a transtibial pullout repair. However, tibial tunnel creation at the anatomic attachment is technically difficult. We hypothesized that a newly developed point-contact aiming guide [Unicorn Meniscal Root (UMR) guide] can create the tibial tunnel at a better position rather than a previously designed MMPRT guide. The aim of this study was to compare the position of the created tibial tunnel between the two meniscal root repair guides. Materials and methods: Thirty-eight patients underwent transtibial pullout repairs. Tibial tunnel creation was performed using the UMR guide (19 cases) or MMPRT guide (19 cases). Three-dimensional computed tomography images of the tibial surface were evaluated using the Tsukada’s measurement method postoperatively. The expected anatomic center of the MM posterior root attachment was defined as the center of three tangential lines referring to three anatomic bony landmarks (anterior border of the posterior cruciate ligament, lateral margin of the medial tibial plateau, and retro-eminence ridge). The expected anatomic center and tibial tunnel center were evaluated using the percentage-based posterolateral location on the tibial surface. The distance between the anatomic center and tunnel center was calculated. Results: The anatomic center of the MM posterior root footprint was located at a position of 79.2% posterior and 39.5% lateral. The mean of the tunnel center in the UMR guide was similar to that in the MMPRT guide (posterior direction, P = 0.096; lateral direction, P = 0.280). The mean distances between the tunnel center and the anatomic center were 4.06 and 3.99mm in the UMR and MMPRT guide group, respectively (P = 0.455). Conclusions: The UMR guide, as well as the MMPRT guide, is a useful device to create favorable tibial tunnels at the MM posterior root attachment for pullout repairs in patients with MMPRTs. Level of evidence: IV