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Fabrication of Ruby thin film for temperature indicator application
Hiroaki Aizawa,Kenichi Ito,Sayaka Takahashi,Shuji Komuro,Yukari Miyazaki,Tooru Katsumata 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Chromium doped sapphire (Ruby) films have been fabricated on Si substrate by laser ablation, and their fundamental optical property and thermal characteristics are evaluated for temperature sensor application. The red emission near 700 nm which originates from 3d transition in Cr<SUP>3+</SUP> ions was clearly observed from the Ruby films. The split of PL peak, originated in 3d-orbital of chromium ion, is also clearly observed from Ruby films. Temperature dependence of PL spectrum from ruby films was measured under Ar laser excitation. PL intensity and PL peak positiongreatly vary with temperature ranging from 293 K to 443 K. To take the advantage of this phenomenon, the temperature sensor with calibration free can be developed.
Kim, Raeyeong,Kanamaru, Shuji,Mikawa, Tsutomu,Pré,vost, Chantal,Ishii, Kentaro,Ito, Kentaro,Uchiyama, Susumu,Oda, Masayuki,Iwasaki, Hiroshi,Kim, Seog K,Takahashi, Masayuki Oxford University Press 2018 Nucleic acids research Vol.46 No.5
<P><B>Abstract</B></P><P>Mg<SUP>2+</SUP> ion stimulates the DNA strand exchange reaction catalyzed by RecA, a key step in homologous recombination. To elucidate the molecular mechanisms underlying the role of Mg<SUP>2+</SUP> and the strand exchange reaction itself, we investigated the interaction of RecA with Mg<SUP>2+</SUP> and sought to determine which step of the reaction is affected. Thermal stability, intrinsic fluorescence, and native mass spectrometric analyses of RecA revealed that RecA binds at least two Mg<SUP>2+</SUP> ions with K<SUB>D</SUB> ≈ 2 mM and 5 mM. Deletion of the C-terminal acidic tail of RecA made its thermal stability and fluorescence characteristics insensitive to Mg<SUP>2+</SUP> and similar to those of full-length RecA in the presence of saturating Mg<SUP>2+</SUP>. These observations, together with the results of a molecular dynamics simulation, support the idea that the acidic tail hampers the strand exchange reaction by interacting with other parts of RecA, and that binding of Mg<SUP>2+</SUP> to the tail prevents these interactions and releases RecA from inhibition. We observed that binding of the first Mg<SUP>2+</SUP> stimulated joint molecule formation, whereas binding of the second stimulated progression of the reaction. Thus, RecA is actively involved in the strand exchange step as well as bringing the two DNAs close to each other.</P>
Kim, Kil Suk,Noh, Su Bum,Katsuda, Takayuki,Ito, Shuji,Osuka, Atsuhiro,Kim, Dongho Royal Society of Chemistry 2007 Chemical communications Vol.2007 No.24
<P>Intramolecular charge transfer in 5,15-bis(azulenylethynyl) substituted zinc(<SMALL>II</SMALL>) porphyrin leads to a significant enhancement of two-photon absorption at near-IR region, which has been investigated by femtosecond <I>Z</I>-scan method.</P> <P>Graphic Abstract</P><P>Intramolecular charge transfer in 5,15-bis(azulenylethynyl) substituted zinc(<SMALL>II</SMALL>) porphyrin leads to a significant enhancement of two-photon absorption at near-IR region, which has been investigated by femtosecond <I>Z</I>-scan method. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b704986b'> </P>