http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Hidekazu Miyaji,안교한,박수문,김대식,Byoung-Yong Chang 대한화학회 2008 Bulletin of the Korean Chemical Society Vol.29 No.12
Described are the electrochemical and 19F NMR detection of anions, ion-pairs, and zwitterionic L-phenylalanine with the ferrocene-based hetero-ditopic receptor. A cyclic voltammetric study shows that the receptor induces a positive shift in the ferrocene oxidation potential upon binding of a potassium cation, whereas it induces a negative shift upon binding of an acetate anion, both of which can be reversed. Also, the redox potential shifts were dependent on ion-pairing interactions. Furthermore, direct detection of an amino acid in its zwitterionic form is demonstrated by 19F NMR spectroscopy in aqueous media.
Kim, Dae-Sik,Miyaji, Hidekazu,Chang, Byoung-Yong,Park, Su-Moon,Ahn, Kyo Han Royal Society of Chemistry 2006 Chemical communications Vol.2006 No.31
<P>A ferrocene-based bis(<I>o</I>-trifluoroacetylcarboxanilide) receptor selectively recognizes <I>m</I>-phenylene diacetate through cooperative binding; the receptor also displays a significant negative shift in the oxidation potential of ferrocene upon the guest binding.</P> <P>Graphic Abstract</P><P>A neutral ferrocene-based ditopic receptor binds a dicarboxylate in a cooperative 1 ∶ 1 binding mode, showing a very high affinity (<I>K</I> = 1.6 × 10<SUP>7</SUP> M<SUP>−1</SUP> in acetonitrile at 303 K) and also a large negative shift in the redox potential. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b606081a'> </P>
MONITORING OBSERVATIONS OF THE JUPITER-FAMILY COMET 17P/HOLMES DURING ITS 2014 PERIHELION PASSAGE
Kwon, Yuna Grace,Ishiguro, Masateru,Hanayama, Hidekazu,Kuroda, Daisuke,Honda, Satoshi,Takahashi, Jun,Kim, Yoonyoung,Lee, Myung Gyoon,Choi, Young-Jun,Kim, Myung-Jin,Vaubaillon, Jeremie J.,Miyaji, Takes American Astronomical Society 2016 The Astrophysical journal Vol.818 No.1
<P>We performed a monitoring observation of a Jupiter-family comet, 17P/Holmes, during its 2014 perihelion passage to investigate its secular change in activity. The comet has drawn the attention of astronomers since its historic outburst in 2007, and this occasion was its first perihelion passage since then. We analyzed the obtained data using an aperture photometry package and derived the Af rho parameter, a proxy for the dust-production rate. We found that Af rho showed asymmetric properties with respect to the perihelion passage: it increased moderately from 100 cm at the heliocentric distance of r(h) = 2.6-3.1 AU to a maximal value of 185 cm at r(h) = 2.2 AU (near the perihelion) during the inbound orbit, while dropping rapidly to 35 cm at r(h) = 3.2 AU during the outbound orbit. We applied a model for characterizing dust-production rates as a function of r(h) and found that the fractional active area of the cometary nucleus had dropped from 20%-40% in 2008-2011 (around the aphelion) to 0.1%-0.3% in 2014-2015 (around the perihelion). This result suggests that a dust mantle would have developed rapidly in only one orbital revolution around the Sun. Although a minor eruption was observed on UT 2015 January 26 at r(h) = 3.0 AU, the areas excavated by the 2007 outburst would be covered with a layer of dust (less than or similar to 10 cm depth) which would be enough to insulate the subsurface ice and to keep the nucleus in a state of low activity.</P>