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- 저자 : Masaaki Ashida (검색결과 2 건)
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Kouichi Katayama,Kensuke Miyajima,Masaaki Ashida,Tadashi Itoh 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.5
By the selective excitation of localized excitons in Cd0:8Mn0:2Te at 2 K, a new nonlinear PL band (hereinafter referred to as the X band) appears on the higher energy side of the ordinary magnetic polaron band. When the X band is observed through a linear analyzer with weak magnetic fields (0 - 0.3 T), under a Faraday configuration, it exhibits an oscillatory structure. The energy interval of this oscillation is half that of the Faraday rotation spectrum observed in the transmission spectrum. Therefore, the oscillation is interpreted as being caused by the Faraday rotation of the X-band luminescence, which is first emitted near the surface of excitation, passes through the sample, is re ected back from the rear surface and then passes through the sample again. By the selective excitation of localized excitons in Cd0:8Mn0:2Te at 2 K, a new nonlinear PL band (hereinafter referred to as the X band) appears on the higher energy side of the ordinary magnetic polaron band. When the X band is observed through a linear analyzer with weak magnetic fields (0 - 0.3 T), under a Faraday configuration, it exhibits an oscillatory structure. The energy interval of this oscillation is half that of the Faraday rotation spectrum observed in the transmission spectrum. Therefore, the oscillation is interpreted as being caused by the Faraday rotation of the X-band luminescence, which is first emitted near the surface of excitation, passes through the sample, is re ected back from the rear surface and then passes through the sample again.
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Jang, In-Hwan,Chosa, Naoyuki,Kim, Sung-Hee,Nam, Hyuck-Jin,Lemaitre, Bruno,Ochiai, Masanori,Kambris, Zakaria,Brun, Sylvain,Hashimoto, Carl,Ashida, Masaaki,Brey, Paul T.,Lee, Won-Jae Elsevier 2006 Developmental cell Vol.10 No.1
<P><B>Summary</B></P><P>The Toll receptor was originally identified as an indispensable molecule for <I>Drosophila</I> embryonic development and subsequently as an essential component of innate immunity from insects to humans. Although in <I>Drosophila</I> the Easter protease processes the pro-Spätzle protein to generate the Toll ligand during development, the identification of the protease responsible for pro-Spätzle processing during the immune response has remained elusive for a decade. Here, we report a protease, called Spätzle-processing enzyme (SPE), required for Toll-dependent antimicrobial response. Flies with reduced SPE expression show no noticeable pro-Spätzle processing and become highly susceptible to microbial infection. Furthermore, activated SPE can rescue ventral and lateral development in embryos lacking Easter, showing the functional homology between SPE and Easter. These results imply that a single ligand/receptor-mediated signaling event can be utilized for different biological processes, such as immunity and development, by recruiting similar ligand-processing proteases with distinct activation modes.</P>
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