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ssbauer spectroscopic evidence on the heme binding to the proximal histidine in unfolded carbonmonoxy myoglobin by guanidine hydrochlorideHarami, Taikan*; Kitao, Shinji*; Kobayashi, Yasuhiro*; Mitsui, Takaya
Hyperfine Interactions, 181(1-3), p.179 - 187, 2008/01
Times Cited Count：2 Percentile：22.28(Physics, Atomic, Molecular & Chemical)The unfolded heme structure in myoglobin is controversial because of no chance of direct X-ray structure analyses. The unfolding of carbonmonoxy myoglobin (MbCO) by guanidine hydrochloride (GdnHCl) was studied by the Mssbauer spectroscopy. The spectra show the presence of a sort of spectrum in the unfolded MbCO, independent on the concentration of GdnHCl from 1 to 6 M and the increase of the fraction of unfolded MbCO, depending on the GdnHCl concentration. The isomer shift of the iron of heme in the unfolded MbCO was identified to be different from that of the native MbCO as the globin structure in Mb collapses under the unfolded conditions. This result and the existing related Mssbauer data proved that the heme in the unfolded MbCO may remain coordinated to the proximal histidine.
Shinto, Katsuhiro; Vermare, C.*; Harami, Taikan*; Sugimoto, Masayoshi; Garin, P.*; Maebara, Sunao; Sakaki, Hironao; Ohira, Shigeru; Okumura, Yoshikazu; Mosnier, A.*; et al.
Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.255 - 258, 2008/00
Shobu, Takahisa; Tozawa, Kazukiyo*; Shiwaku, Hideaki; Konishi, Hiroyuki; Inami, Toshiya; Harami, Taikan; Mizuki, Junichiro
AIP Conference Proceedings 879, p.902 - 906, 2007/01
BL22XU with undulator is consisted of one optical hutch and three experimental hutches and about 120m in length. The aim of this beamline is to perform diffraction and absorption experiment with anomalous dispersion, the high pressure experiments at high or low temperature with multi-anvil type and diamond-anvil type high pressure system and stress measurements. The energy region from 3 to 70keV and high flux of X-rays were required to satisfy these experimental conditions. Then we installed two kinds of monochromator by employing Si (111) crystals. One is SPring-8 "standard" double crystal monochromators to make low-energy X-rays from 3 to 37keV (L-mono), the other is double crystal monochromators, mechanically separated, but combined with calculation to make high-energy X-rays from 36 to 72keV (H-mono). These monochromators were arranged in the tandem for optics. L-mono can be used by lowering the first crystal of the H-mono, on the other hand the H-mono can be used by lifting the whole of L-mono. The liquid nitrogen is used for cooling the crystals, and as a result the high quality monochromatized X-rays is obtained. At the position of 115m from undulator, the beam size is 2.5 mm (vertical) 
3.5 mm (horizontal) (FWHM) and the flux is estimated to be 3 10
photon/s. But the stability of X-rays is rather poor because of the vibration caused by nitrogen liquid cooling system. The vertical position of X-rays changes by about 0.2 mm in a few minutes of periods, and the intensity of X-rays varies at about 10%. The stable X-rays within a limitation of accuracy can be obtained by using Monochromator stabilization, so called MOSTAB, which is a feedback control system.
F by synchrotron radiationHarami, Taikan; Yoda, Yoshitaka*; Fujiwara, Mamoru*
Journal of the Physical Society of Japan, 75(12), p.125002_1 - 125002_2, 2006/12
Times Cited Count：1 Percentile：11.03(Physics, Multidisciplinary)The nuclear excitation of F was first observed by synchrotron radiation in the beamline of SPring-8. The excitation energy, 110 keV, is the highest energy that was observed by synchrotron radiation so far. In spite of the low detector efficiency and the relatively short lifetime of 0.6 ns, the identification of the nuclear excitation was successful. The F nuclear excitation will provide a specific tool for the detection, identification and quatification of fluorine-containing drugs. In the field of elementary particle physics, the parity non-consevation effect can now be studied in nuclear excitation processes in F.
Fe-enriched very high quality iron borate single crystal and observation of magnetic domain structure using X-ray double crystal topographyMitsui, Takaya; Takei, Fumihiko*; Kitao, Shinji*; Seto, Makoto; Harami, Taikan; Zhang, X.*; Yoda, Yoshitaka*; Kikuta, Seishi*
Transactions of the Materials Research Society of Japan, 30(1), p.7 - 10, 2005/03
no abstracts in English
Tozawa, Kazukiyo*; Kiriyama, Koji*; Mitsui, Takaya; Shiwaku, Hideaki; Harami, Taikan
JAERI-Tech 2004-041, 27 Pages, 2004/03
JAERI-Tech-2004-041.pdf:5.11MB
Liquid-N
-cooled Si crystals replaced water-cooled diamond crystals for the double-crystal monochromator on BL11XU at SPring-8. To use the whole energy from 6 keV to 70 keV, we developed the system of dual symmetric Si geometry, Si(111)/Si(311), which can be switched by a horizontal translation (X) stage perpendicular to the beam axis. The off-line experiment was performed to estimate the degree of the crystal strain, which may arise from the way of assembling in the crystal holder. With MoK
, rocking curves from the crystals were measured for the second crystal of the double-crystal diffractometer of parallel setting. Each of the observed full-width at half maximum (FWHM) was almost constant and identical to the calculated value wherever X-rays hit on the crystal surface. By the use of synchrotron radiation from the undulator the crystals were tested and then the characterization was performed. The observed intensities and rocking curves resulted in that each crystal was good for BL11XU and that the performance of X-ray reflection was improved.
Shiwaku, Hideaki; Mitsui, Takaya; Tozawa, Kazukiyo*; Kiriyama, Koji*; Harami, Taikan; Mochizuki, Tetsuro*
AIP Conference Proceedings 705, p.659 - 662, 2004/00
We developed a multi-crystal switching system on a cryogenically cooled monochromator of JAERI materials science beamline, BL11XU. In order to study our science, it is necessary for ensuring at least the energy range of 6 - 70keV to employ Si(111) and Si(311) crystals. The principle of the crystal switching is that, two pair of crystals is arranged side by side, and they are translated in horizontal direction for exchanging. Indium sheets were inserted between both sides of crystals in order to improve thermal contact. Some adjustment stages of the monochromator were removed to avoid the crystal vibration and a sheet heater was installed on an X-axis stage to prevent over-cooling of X-axis stages. The monochromator is under commissioning at present. In comparison with a previous indirect water cooling diamond (111) crystal monochromator, this monochromator provides high flux intensity from 4 times to 7 times. It takes only 5 minutes to exchange and adjust crystals geometry. This mechanism will be easily applied to other crystals, for example asymmetrical-cut crystals.
Tozawa, Kazukiyo*; Kiriyama, Koji*; Mitsui, Takaya; Shiwaku, Hideaki; Harami, Taikan
AIP Conference Proceedings 705, p.671 - 674, 2004/00
Liquid-N-cooled Si crystals replaced water-cooled diamond crystals for the double-crystal monochromator on BL11XU at SPring-8. To use the whole energy from 6keV to 70keV, we adopted the system of alternative dual symmetric Si geometry, Si(111)/Si(311), which can be switched by a horizontal translation (X) stage perpendicular to the beam axis. Before the experiment on BL11XU, the off-line evaluation was performed to estimate the degree of the crystal strain, which may arise from the way of assembling. With MoK, rocking curves from the crystals were measured for the second crystal of the double-crystal diffractometer of parallel setting. Each of the observed FWHM was almost constant and identical to the calculated value wherever X-rays hit on the crystal surface. By the use of synchrotron radiation from the undulator the crystals were tested and then the characterization was performed. The observed intensities and rocking curves resulted in that each crystal was good for BL11XU and that the performance of X-ray reflection was improved.
-graphite intercalation compounds*; Mitsui, Takaya; Harami, Taikan; Yoda, Yoshitaka*; *
Japanese Journal of Applied Physics, 38(SUPPL.38-1), p.535 - 537, 1999/00
Times Cited Count：0 Percentile：0(Physics, Applied)no abstracts in English
Yokoya, Akinari; Sekiguchi, Tetsuhiro; Saito, Yuji; Okane, Tetsuo*; Nakatani, Takeshi; Shimada, Taihei; Kobayashi, Hideki*; Takao, Masaru*; Teraoka, Yuden; Hayashi, Yukio; et al.
Journal of Synchrotron Radiation, 5, p.10 - 16, 1998/00
Times Cited Count：87 Percentile：96.77(Instruments & Instrumentation)no abstracts in English
Mitsui, Takaya; Shimizu, Tatsuo*; *; Yoda, Yoshitaka*; X.W.Zhang*; *; Harami, Taikan; Kikuta, Seishi*
Japanese Journal of Applied Physics, Part 1, 36(10), p.6525 - 6529, 1997/10
Times Cited Count：8 Percentile：44.14(Physics, Applied)no abstracts in English
Kikuta, Seishi*; Yoda, Yoshitaka*; Koyama, Ichiro*; Shimizu, Tatsuo*; Igarashi, Hiroshi*; Izumi, Koichi*; Kunimune, Yorinobu*; Seto, Makoto*; Mitsui, Takaya; Harami, Taikan; et al.
X-Ray and Inner Shell-Processes (AIP Conference Proceedings 389), p.351 - 365, 1997/01
no abstracts in English
Harami, Taikan
Genshiryoku Kogyo, 42(11), p.77 - 79, 1996/00
no abstracts in English
Harami, Taikan; Konishi, Hiroyuki; Yokoya, Akinari
Hoshako, 9(5), p.453 - 457, 1996/00
no abstracts in English
Konishi, Hiroyuki; Yokoya, Akinari; Shiwaku, Hideaki; Motohashi, Haruhiko; *; Kashihara, Yasuharu*; *; Harami, Taikan; Sasaki, Teikichi; Maeta, Hiroshi; et al.
Nuclear Instruments and Methods in Physics Research A, 372, p.322 - 332, 1996/00
Times Cited Count：69 Percentile：97.59(Instruments & Instrumentation)no abstracts in English
Harami, Taikan
Sci. Technol. Jpn., 15(58), p.12 - 16, 1996/00
no abstracts in English
Shiwaku, Hideaki; Yoda, Yoshitaka*; Harami, Taikan; *; Ono, Hideo
JAERI-Research 94-032, 44 Pages, 1994/11
JAERI-Research-94-032.pdf:2.96MB
no abstracts in English
Harami, Taikan; Yokomizo, Hideaki; Ono, Hideo; Hara, Masahiro*; *
Nihon Genshiryoku Gakkai-Shi, 33(4), p.310 - 317, 1991/04
Times Cited Count：0 Percentile：0.01(Nuclear Science & Technology)no abstracts in English
*; Shimada, Taihei; Kabasawa, M.*; Harami, Taikan; Yonehara, Hiroto; *; *;
JAERI-M 91-045, 110 Pages, 1991/03
no abstracts in English
*; Suzuki, Hiromitsu; Minehara, Eisuke; Harami, Taikan
JAERI-M 91-012, 58 Pages, 1991/02
no abstracts in English
