Items where Author is "Koyama, Yasushi"

Artikel Jurnal/Prosiding

Christiana, Rebecca and Miki, Takeshi and Kakitani, Yoshinori and Aoyagi, Shiho and Koyama, Yasushi and Limantara, Leenawaty (2009) Energies and Excited-State Dynamics of 1Bu+, 1Bu- and 3Ag- States of Carotenoids Bound to LH2 Antenna Complexes from Purple Photosynthetic Bacteria. Chemical Physics Letters, 480. pp. 298-295.

Koyama, Yasushi and Kakitani, Yoshinori and Limantara, Leenawaty and Fujii, Ritsuko (2006) Effects of Axial Coordination, Electronic Excitation and Oxidation on Bond Orders in the Bacteriochlorin Macrocycle, and Generation of Radical Cation on Photo-Excitation of in vitro and in vivo Bacteriochlorophyll a Aggregates: Resonance Raman Studies. Chlorophylls and Bacteriochlorophylls. pp. 323-335.

Nagae, Yuichi and Limantara, Leenawaty and Koyama, Yasushi (2004) Photo-protective of Carotenoids in Bacteriochlorophyll a in Solution: Dependence on the Conjugation Length. Journal International Plant & Cell Physiology, 45. pp. 89-277.

Zhang, Jian-Ping and Nagae, Hiroyoshi and Qian, Pu and Limantara, Leenawaty and Fujii, Ritsuko and Watanabe, Yasutaka and Koyama, Yasushi (2001) Localized Excitations on the B850a and B850b Bacteriochlorophylls in the LH2 Antenna Complex from Rhodospirillum molischianum As Probed by the Shifts of the Carotenoid Absorption. Journal of Physical Chemistry, 105 (30). pp. 7312-7322.

Sashima, Tokutake and Limantara, Leenawaty and Koyama, Yasushi (2000) Changes in Carbon-Carbon and Carbon-Nitrogen Stretching Force Constants in the Macrocycles of Bacteriochlorophyll a and Bacteriopheophytin a upon Triplet and Singlet Excitation: Resonance Raman Spectroscopy and Normal Coordinate Analysis of the Unlabelled and Totally 15N-, 13C- and 2H-labelled Species. Journal of Physical Chemistry, 104 (34). pp. 8308-8320.

Koyama, Yasushi and Limantara, Leenawaty and Sashima, Tokutake (1999) Transient Raman spectroscopy of isotope-substituted species of bacteriochlorophyll a, bacteriopheophytin a and chlorophyll a: Changes in the bond orders in the macrocycles upon triplet and singlet excitation. Laser Chemistry, 19. pp. 187-190.

Limantara, Leenawaty and Fujii, Ritsuko and Zhang, Jian-Ping and Kakuno, Tomisaburo and Hara, Hideyuki and Kawamori, Asako and Yagura, Tatsuo and Cogdell, Richard J and Koyama, Yasushi (1998) Generation of Triplet and Cation-Radical Bacteriochlorophyll a in Carotenoidless LH1 and LH2 Antenna Complexes from Rhodobacter sphaeroides. Biochemistry, 35 (70). pp. 17469-17486.

Koyama, Yasushi and Limantara, Leenawaty (1997) Effects of Electronic States on the Bond Orders in the Macrocycles of Bacteriochlorophyll a and Bacteriopheophytin a as Revealed by Resonance Raman Spectroscopy. Spectroscopy of Biological Molecules: Modern Trends. pp. 127-128.

Limantara, Leenawaty and Sakamoto, Shun and Koyama, Yasushi and Nagae, Hiroyoshi (1997) Effects of Nonpolar and Polar Solvents on the Qx and Qy Energies of Bacteriochlorophyll a and Bacteriopheophytin a. Photochemistry and Photobiology, 65 (2). pp. 330-337.

Limantara, Leenawaty and Katheder, Ingrid and Scheer, Hugo and Schafer, Wolfram and Koyama, Yasushi (1996) The T1 and S1 Raman spectra of 15N and 2H-enriched bacteriochlorophyll a: Changes in bond order upon triplet and singlet excitation. Chemical Physics Letters, 262 (5). pp. 656-662. ISSN 00092614

Mizoguchi, Tadashi and Limantara, Leenawaty and Matsuura, Katsumi and Shimada, Keizo and Koyama, Yasushi (1996) Aggregation forms of 8-Ethyl-12-Ethyl Farneshyl bacteriochlorophyll c in methanol-chloroform mixtures as revealed by 1H NMR spectroscopy. Journal of Molecular Structure, 379 (1-3). pp. 249-265.

Misono, Yasuhito and Limantara, Leenawaty and Koyama, Yasushi and Itoh, Koichi (1996) Solvent Effects on the Resonance Raman and Electronic Absorption Spectra of Bacteriochlorophyll a Cation Radical. The Journal of Physical Chemistry, 100 (6). pp. 2422-2429.

Misono, Yasuhito and Nishizawa, Ei‐ichi and Limantara, Leenawaty and Koyama, Yasushi and Itoh, Koichi (1995) Solvent effects on the resonance Raman spectra of bacteriochlorophyll a cation radical. Chemical Physics Letters, 236 (4-5). pp. 413-418. ISSN 00092614

Limantara, Leenawaty and Kurimoto, Yoshitaka and Shimamura, Toshio and Utsumi, Horiaki and Katheder, Ingrid and Scheer, Hugo and Koyama, Yasushi (1995) The environment of the four nitrogen atoms of bacteriochlorophyll a in solutions as revealed by 15N NMR spectroscopy. Chemical Physics Letters, 236 (1-2). pp. 71-77. ISSN 00092614

Limantara, Leenawaty and Koyama, Yasushi and Katheder, Ingrid and Scheer, Hugo (1994) Transient Raman spectroscopy of 15N-substituted bacteriochlorophyll a. An empirical assignment of T1 Raman lines. Chemical Physics Letters. ISSN 00092614