Y. Koyama

发表

Negligible shift of 3Ag- potential in longer-chain carotenoids as revealed by a single persistent peak of 3Ag-→1Ag- stimulated emission followed by 3Ag-←1Ag- transient-absorption

T. Miki, Chunyong Li, Yoshinori Kakitani, 2007 .

Effects of plant carotenoid spacers on the performance of a dye-sensitized solar cell using a chlorophyll derivative: Enhancement of photocurrent determined by one electron-oxidation potential of each carotenoid

S. Sasaki, Y. Wada, Xiao‐Feng Wang, 2006 .

Low-lying singlet states of carotenoids having 8-13 conjugated double bonds as determined by electronic absorption spectroscopy

H. Hashimoto, Jianping Zhang, Y. Kanematsu, 2005 .

Dye-sensitized solar cells using a chlorophyll a derivative as the sensitizer and carotenoids having different conjugation lengths as redox spacers

S. Sasaki, Y. Wada, Xiao‐Feng Wang, 2005 .

Vibrational relaxation in the 1Bu+ state of carotenoids as determined by Kerr-gate fluorescence spectroscopy

Y. Kanematsu, Y. Koyama, H. Nagae, 2004 .

The first detection of the 3A g - state in carotenoids using resonance-Raman excitation profiles

Y. Koyama, K. Furuichi, Tokutake Sashima, 2002 .

Cis-to-trans Isomerization of Spheroidene in the Triplet State as Detected by Time-Resolved Absorption Spectroscopy

H. Hashimoto, Jianping Zhang, Y. Koyama, 2002 .

Fluorescence spectroscopy of all-trans-lycopene : comparison of the energy and the potential displacements of its 2Ag- state with those of neurosporene and spheroidene

Y. Koyama, H. Nagae, R. Fujii, 2001 .

The 1Bu-type singlet state of β-carotene as a precursor of the radical cation found in chloroform solution by sub-picosecond time-resolved absorption spectroscopy

L. Skibsted, A. Mortensen, Jianping Zhang, 2001 .

Time‐dependent Changes in the Carotenoid Composition and Preferential Binding of Spirilloxanthin to the Reaction Center and Anhydrorhodovibrin to the LH1 Antenna Complex in Rhodobium marinum ¶

Yasushi Koyama, Pu Qian, Tadashi Mizoguchi, 2001, Photochemistry and photobiology.

CONFIGURATIONS OF CAROTENOIDS IN THE REACTION CENTER and THE LIGHT‐HARVESTING COMPLEX OF Rhodospirillum rubrum. NATURAL SELECTION OF CAROTENOID CONFIGURATIONS BY PIGMENT PROTEIN COMPLEXES

K. Saiki, Y. Koyama, M. Kito, 1990 .

The structures of S0 spheroidene in the light-harvesting (LH2) complex and S0 and T1 spheroidene in the reaction center of Rhodobacter sphaeroides 2.4.1 as revealed by Raman spectroscopy

R. Cogdell, Y. Koyama, T. Shimamura, 1998 .

Supplementary and revised assignment of the peaks of the 7,9-, 9,9'-, 13,13'-, 9,13'-di-cis and 9,9',13-tri-cis isomers of β-carotene in high-performance liquid chromatography using a column of calcium hydroxide

K. Nagayama, H. Hashimoto, Y. Koyama, 1988 .

1H NMR spectra of the all-trans, 7-cis, 9-cis, 13-cis and 15-cis isomers of β-carotene: elongation of the double bond and shortening of the single bond toward the center of the conjugated chain as revealed by vicinal coupling constants

H. Hashimoto, Y. Koyama, T. Shimamura, 1989 .

Shifts of the 1A−g→1B+u electronic absorption of carotenoids in nonpolar and polar solvents

R. Cogdell, Y. Koyama, H. Nagae, 1994 .

Fabrication of dye-sensitized solar cells using chlorophylls c1 and c2 and their oxidized forms c1′ and c2′ from Undaria pinnatifida (Wakame)

T. Maoka, Y. Wada, Xiao‐Feng Wang, 2007 .

The relation between the crystal axes and the dipping direction of built-up films of octadecanoic acid as revealed by polarized infrared transmission spectroscopy

Y. Koyama, S. Toda, Miyoko Yanagishita, 1977 .

Spectroscopic properties and temperature induced electronic configuration changes of all-trans and 15-cis β-carotenes in ionic liquids

G. Bialek-Bylka, B. Jazurek, A. Skrzypczak, 2007, Photosynthetica.

The role of the 11Bu− state in carotenoid-to-bacteriochlorophyll singlet-energy transfer in the LH2 antenna complexes from Rhodobacter sphaeroides G1C, Rhodobacter sphaeroides 2.4.1, Rhodospirillum molischianum and Rhodopseudomonas acidophila

R. Cogdell, F. S. Rondonuwu, Y. Koyama, 2004 .

A first detection of singlet to triplet conversion from the 11Bu− to the 13Ag state and triplet internal conversion from the 13Ag to the 13Bu state in carotenoids: dependence on the conjugation length

F. S. Rondonuwu, Y. Koyama, R. Fujii, 2003 .

Transient Absorption from the 1Bu+ State of All‐trans‐β‐carotene Newly Identified in the Near‐infrared Region ¶

L. Skibsted, Jianping Zhang, Y. Koyama, 2001 .

Singlet Excited States and the Light‐Harvesting Function of Carotenoids in Bacterial Photosynthesis

T. Gillbro, P. Andersson, Y. Koyama, 1996 .

The 2 1Ag− state of a carotenoid bound to the chromatophore membrane or Rhodobacter sphaeroides 2.4.1 as revealed by transient resonance raman spectroscopy

H. Hashimoto, Y. Koyama, M. Kuki, 1990 .

The CC stretching Raman lines of [β-carotene isomers in the S1 state as detected by pump-probe resonance Raman spectroscopy

H. Hashimoto, Y. Koyama, 1989 .

Mechanism of the Carotenoid-to-Bacteriochlorophyll Energy Transfer via the S1 State in the LH2 Complexes from Purple Bacteria

T. Inaba, Jianping Zhang, Y. Koyama, 2000 .

Reaction rates of the hydrated electron with N2O in high temperature water and potential surface of the N2O− anion

Kenji Takahashi, Timothy W. Marin, D. Bartels, 2004 .

A dye-sensitized solar cell using pheophytin–carotenoid adduct: Enhancement of photocurrent by electron and singlet-energy transfer and by suppression of singlet–triplet annihilation due to the presence of the carotenoid moiety

S. Sasaki, Y. Wada, Xiao‐Feng Wang, 2007 .

Dye-sensitized solar cells using retinoic acid and carotenoic acids: Dependence of performance on the conjugation length and the dye concentration

S. Ito, T. Kitamura, Xiao‐Feng Wang, 2005 .

Dependence of Photocurrent and Conversion Efficiency of Titania-Based Solar Cell on the Qy Absorption and One Electron-Oxidation Potential of Pheophorbide Sensitizer

Y. Wada, Xiao‐Feng Wang, H. Tamiaki, 2008 .

Excited state dynamics of carotenoids free and bound to pigment-protein complexes

F. S. Rondonuwu, Y. Koyama, 2015 .

Mechanisms of Suppression and Enhancement of Photocurrent/Conversion Efficiency in Dye-Sensitized Solar-Cells Using Carotenoid and Chlorophyll Derivatives as Sensitizers

Yoshinori Kakitani, Y. Koyama, H. Nagae, 2012, Molecules.

Separation and determination of cis/trans-β-carotenes by high-performance liquid chromatography

Y. Koyama, K. Tsukida, K. Saiki, 1982 .

Excited-State Dynamics of Overlapped Optically-Allowed 1Bu+ and Optically-Forbidden 1Bu− or 3Ag− Vibronic Levels of Carotenoids: Possible Roles in the Light-Harvesting Function

T. Miki, Yoshinori Kakitani, Y. Koyama, 2010, International journal of molecular sciences.

Fluorescence Spectroscopy of All-trans-anhydrorhodovibrin and Spirilloxanthin: Detection of the 1Bu- Fluorescence

Y. Koyama, H. Nagae, T. Ishikawa, 2001 .

A new singlet-excited state of all-trans-spheroidene as detected by resonance-Raman excitation profiles

Y. Koyama, H. Nagae, Tokutake Sashima, 1999 .

The 2Ag− energies of all-trans-neurosporene and spheroidene as determined by fluorescence spectroscopy

Y. Koyama, R. Fujii, Kengo Onaka, 1998 .

The state energy and the displacements of the potential minima of the 2Ag− state in all-trans-β-carotene as determined by fluorescence spectroscopy

Y. Koyama, H. Nagae, R. Fujii, 1999 .

The 1Bu+, 1Bu-, and 2Ag- Energies of Crystalline Lycopene, β-Carotene, and Mini-9-β-carotene as Determined by Resonance-Raman Excitation Profiles: Dependence of the 1Bu- State Energy on the Conjugation Length

H. Hashimoto, Y. Koyama, Tokutake Sashima and, 2000 .

15‐cis‐β‐Carotene found in the reaction center of spinach photosystem II

T. Tomo, K. Satoh, Y. Koyama, 1995 .

The structure of the aggregate form of bacteriochlorophyll c showing the Qy absorption above 740 nm: a 1H-NMR study

K. Shimada, K. Matsuura, Y. Koyama, 1996 .

AGGREGATION FORMS OF 8-ETHYL-12-ETHYL FARNESYL BACTERIOCHLOROPHYLL C IN METHANOL-CHLOROFORM MIXTURES AS REVEALED BY ^1H-NMR SPECTROSCOPY

K. Shimada, K. Matsuura, Y. Koyama, 1996 .

Stacking of bacteriochlorophyll c macrocycles in chlorosome from Chlorobium limicola as revealed by intermolecular 13C magnetic-dipole correlation, X-ray diffraction, and quadrupole coupling in 25Mg NMR.

H. Utsumi, Yoshinori Kakitani, Y. Koyama, 2009, Biochemistry.

Strong carotenoid-to-peptide interaction immediately after triplet excitation triggering conformational changes in photo-reaction center-bound 15-cis-spheroidene as revealed by submicrosecond time-resolved Raman spectroscopy

Jianping Zhang, Yoshinori Kakitani, Y. Koyama, 2008 .

Cis-trans-isomerization of violaxanthin in LHC II: violaxanthin isomerization cycle within the violaxanthin cycle

Z. Krupa, W. Gruszecki, Y. Koyama, 1997 .

Internal-conversion and radiative-transition processes among the 1Bu+, 1Bu− and 2Ag− states of all-trans-neurosporene as revealed by subpicosecond time-resolved Raman spectroscopy

Jianping Zhang, F. S. Rondonuwu, Y. Koyama, 2002 .

ALL‐trans β‐CAROTENE‐5,6‐EPOXIDE IN THYLAKOID MEMBRANES

Y. Inoue, I. Ashikawa, K. Satoh, 1987 .

Effects of singlet and triplet excitation, oxidation and axial coordination on the bond orders in the macrocycle of bacteriochlorophyll a as revealed by resonance Raman spectroscopy

Y. Koyama, L. Limantara, 1998 .

Raman spectra of cis‐trans isomers of retinal homologues. Key bands of unmethylated cis configurations and of all‐trans parts of mono‐cis isomers

Y. Koyama, K. Tsukida, Masayoshi Ito, 1986 .

Central-Cis isomers of lutein found in the major light-harvesting complex of Photosystem II (LHC IIb) of higher plants

A. Young, G. Bialek-Bylka, Y. Koyama, 1998, Photosynthesis Research.

Configuration of the carotenoid in the reaction centers of photosynthetic bacteria. Comparison of the resonance Raman spectrum of the reaction center of Rhodopseudomonas sphaeroides G1C with those of cis-trans isomers of β-carotene

K. Saiki, Y. Koyama, M. Kito, 1982 .

A null lesion in the rhodopin 3,4-desaturase of Rhodospirillum rubrum unmasks a cryptic branch of the carotenoid biosynthetic pathway.

R. Ghosh, Y. Hu, Y. Koyama, 1998, Biochemistry.

Dependence of the triplet potential of retinal homologs on the chain length: resonance Raman spectroscopy and analysis of triplet-sensitized isomerization

H. Hashimoto, Y. Koyama, Y. Mukai, 1990 .

Time-resolved absorption spectroscopy of the triplet state produced from the all-trans, 7-cis, 9-cis, 13-cis, and 15-cis isomers of β-carotene

Hideki Hashimoto, Yasushi Koyama, Takayoshi Kobayashi, 1989 .

Time-resolved resonance Raman spectroscopy of triplet .beta.-carotene produced from all-trans, 7-cis, 9-cis, 13-cis, and 15-cis isomers and high-pressure liquid chromatography analyses of photoisomerization via the triplet state

H. Hashimoto, Y. Koyama, 1988 .

Transient Raman spectra of the all-trans and 7-, 9-, 11- and 13-mono-cis isomers of retinal and the mechanism of the cis-trans isomerization in the lowest excited triplet state

M. Tasumi, H. Hamaguchi, H. Okamoto, 1984 .

The T1 and S1 raman spectra of 15N- and 2H-enriched bacteriochlorophyll a: changes in bond order upon triplet and singlet excitation

W. Schäfer, H. Scheer, Y. Koyama, 1996 .

Spectroscopic studies of carotenoids in photosynthetic systems

Y. Koyama, H. Hashimoto, Y. Koyama, 1993 .

Effects of the terminal-methyl position and of the length of the conjugated chain on the cis isomers produced by photo-isomerization: analysis by HPLC and configurational determination by 1H-NMR spectroscopy of isomeric analogues of retinal and β-apo-12′-carotenal

Y. Koyama, Masayoshi Ito, Y. Yamano, 1997 .

Rotational isomerism of N‐acetylamino acid methylamides having serine, tyrosine, histidine, and proline residues as revealed by Raman spectroscopy

H. Uchida, Y. Koyama, K. Harada, 1977, Biopolymers.

Triplet-sensitized and thermal isomerization of all-trans, 7-cis, 9-cis, 13-cis, and 15-cis isomers of. beta. -carotene: Configurational dependence of the quantum yield of isomerization via the T sub 1 state

Y. Koyama, H. Nagae, M. Kuki, 1991 .

Light-induced structural change of .beta.-carotene in thylakoid membranes

Y. Inoue, I. Ashikawa, Y. Koyama, 1986 .

Nondestructive Structural Analysis of Photosynthetic Pigments in Living Rhodobacter Sphaeroides Mutants by Near-Infrared Fourier Transform Raman Spectroscopy

Y. Ozaki, S. Muraishi, Y. Koyama, 1992 .

Raman and infrared spectra of the 7-cis and di-cis isomers of retinal

Y. Koyama, J. Umemura, K. Tsukida, 1984 .

THE So AND TI STATES OF ISOMERIC CANTHAXANTHIN AS COMPARED WITH THOSE OF GROUPS DETECTED BY RAMAN SPECTROSCOPY P-CAROTENE: EFFECT OF THE TERMINAL CARBONYL

H. Hashimoto, Y. Koyama, 1999 .

Isolation by high‐pressure liquid chromatography, configurational determination by 1H‐NMR, and analyses of electronic absorption and raman spectra of isomeric spheroidene

Y. Koyama, T. Shimamura, Naoto Ohashi, 1998 .

Isolation by high-pressure liquid chromatography of cis-trans isomers of β-apo-12′-carotenal and determination of their configurations by 1H NMR spectroscopy

Y. Koyama, T. Mizoguchi, Ying Hu, 1995 .

EFFECT OF PROTONATION ON THE ISOMERIZATION PROPERTIES OF n‐BUTYLAMINE SCHIFF BASE OF ISOMERIC RETINAL AS REVEALED BY DIRECT HPLC ANALYSES: SELECTION OF ISOMERIZATION PATHWAYS BY RETINAL PROTEINS

Y. Koyama, M. Komori, Keishi Kubo, 1991, Photochemistry and photobiology.

THE S0 AND Ti STATES OF ISOMERIC CANTHAXANTHIN AS COMPARED WITH THOSE OF β‐CAROTENE: EFFECT OF THE TERMINAL CARBONYL GROUPS DETECTED BY RAMAN SPECTROSCOPY

H. Hashimoto, Y. Koyama, 1991 .

Raman and infrared spectra of the all-trans, 7-cis, 9-cis, 13-cis and 15-cis isomers of β-carotene: Key bands distinguishing stretched or terminal-bent configurations form central-bent configurations

Yasushi Koyama, Mitsuo Tasumi, M. Nakata, 1988 .

Raman spectra of chlorophyll forms

Makoto Tanaka, Y. Koyama, K. Uehara, 1986 .

How the terminal methyl group affects the S0, S1 and T1 electronic structures of a conjugated aldehyde chain: A comparison between all-trans-β-apo-12′-carotenal and its analogue by NMR and Raman spectroscopy

Jianping Zhang, Y. Koyama, T. Mizoguchi, 1997 .

Unique properties of the 11-cis and 11,11′-di-cis isomers of β-carotene as revealed by electronic absorption, resonance Raman and 1H and 13C NMR spectroscopy and by HPLC analysis of their thermal isomerization

U. Hengartner, H. Hashimoto, Y. Koyama, 1997 .

Isolation by high-pressure liquid chromatography of the cis-trans isomers of .beta.-apo-8'-carotenal. Determination of their S0-state configurations by NMR spectroscopy and prediction of their S1- and T1-state configurations by transient Raman spectroscopy

H. Hashimoto, H. Utsumi, Y. Koyama, 1993 .

Low-lying electronic levels of spheroidene bound to the light-harvesting (LH2) complex of Rhodobacter sphaeroides 2.4.1 as determined by fluorescence and fluorescence—excitation spectroscopy at 170 K

R. Cogdell, Y. Koyama, Yasutaka Watanabe, 1993 .

[27] Proton nuclear magnetic resonance and raman spectroscopies of cis-trans-carotenoids from pigment-protein complexes

Y. Koyama, 1992 .

A coordination-marker Raman line of bacteriochlorophyll a in the T1 state

Y. Koyama, E. Nishizawa, 1991 .

Raman spectra of chlorophyll a in the T1 state

H. Hashimoto, Y. Koyama, E. Nishizawa, 1989 .

Structural Studies on a Photosystem II Reaction-Center Complex Consisting of D-1 and D-2 Polypeptides and Cytochrome b-559 by Resonance Raman Spectroscopy and High-Performance Liquid Chromatography

H. Hayashi, K. Satoh, M. Tasumi, 1987 .

15-Cis-carotenoids found in the reaction center of a green sulfur bacterium Chlorobium tepidum and in the Photosystem I reaction center of a cyanobacterium Synechococcus vulcanus

G. Bialek-Bylka, Y. Koyama, K. Satoh, 1998, Photosynthesis Research.

Cis-Trans Carotenoids in Photosynthesis: Configurations, Excited-State Properties and Physiological Functions

Y. Koyama, R. Fujii, 1999 .

1H NMR, electronic-absorption and resonance-Raman spectra of isomeric okenone as compared with those of isomeric β-carotene, canthaxanthin, β-apo-8′-carotenal and spheroidene

Y. Koyama, R. Fujii, T. Mizoguchi, 1998 .

Triplet excitation of precursors of spirilloxanthin bound to the chromatophores of Rhodospirillum rubrum as detected by transient Raman spectroscopy

H. Hashimoto, Y. Koyama, M. Kuki, 1991 .

The 21A-g state of a carotenoid bound to spinach chloroplast as revealed by picosecond transient Raman spectroscopy

H. Hashimoto, Y. Koyama, 1990 .

Transient raman spectra of all-trans, 7-cis, 9-cis, 11-cis and 13-cis retinylideneacetaldehyde. Structures of triplet species as revealed by Raman spectroscopy

H. Hashimoto, Y. Koyama, Y. Mukai, 1988 .

Isolation of cis-trans isomers of canthaxanthin by high-performance liquid chromatography using a calcium hydroxide column and identification of their configurations by 1H NMR spectroscopy

H. Hashimoto, Y. Koyama, T. Shimamura, 1988 .

Excited States of Retinoids, Carotenoids, and Chlorophylls

Y. Koyama, 1992 .

The energies and kinetics of triplet carotenoids in the LH2 antenna complexes as determined by phosphorescence spectroscopy

T. Taguchi, F. S. Rondonuwu, Y. Koyama, 2004 .

The T1 Raman spectra of bacteriochlorophyll a: changes in the bond orders of the conjugated macrocycle upon triplet excitation

Y. Koyama, E. Nishizawa, 1990 .

RESONANCE RAMAN SPECTRA OF EXCITED TRIPLET-STATES OF β-CAROTENE ISOMERS

H. Hashimoto, Y. Koyama, J. Teraoka, 1985 .

COMPARISON OF THE PATHWAYS AND QUANTUM YIELDS OF DIRECT PHOTOISOMERIZATION OF UNPROTONATED AND PROTONATED N‐BUTYLAMINE SCHIFF BASES OF ISOMERIC RETINYLIDENEACETALDEHYDE WITH THOSE OF SCHIFF BASES OF ISOMERIC RETINAL: RATIONALIZATION OF THE SELECTION OF THE RETINYLIDENE CHROMOPHORE BY RETINOCHROME

Y. Koyama, Y. Mukai, T. Imahori, 1992 .

The resonance Raman spectrum of carotenoids as an intrinsic probe for membrane potential. Oscillatory changes in the spectrum of neurosporene in the chromatophores of Rhodopseudomonas sphaeroides.

W. G. Martin, P. Carey, Y. Koyama, 1979, Biochimica et biophysica acta.

Picosecond time-resolved absorption study of all-trans- and 9-cis-retinal: configurational relaxation in the triplet state

N. Mataga, Y. Koyama, Y. Hirata, 1987 .

Triplet-Sensitized and Thermal Isomerization of all-trans, 7-cis, 9- cis, 13-cis, and 15-cis Isomers of β-Carotene: Configurational Dependence of the Quantum Yield of Isomerization via the T1 State.

Y. Koyama, H. Nagae, M. Kuki, 1992 .

S1- and T1-state properties of n-butylamine Schiff bases of isomeric retinylideneacetaldehyde as revealed by transient absorption and transient Raman spectroscopies and by HPLC analysis of triplet-sensitized isomerization

N. Mataga, H. Hashimoto, Y. Koyama, 1991 .

Dependence of the Triplet Potential of Retinal Homologues on the Chain Length: Resonance Raman Spectroscopy and Analysis of Triplet-Sensitized Isomerization.

H. Hashimoto, Y. Koyama, Y. Mukai, 1990 .

Configurational changes of retinal in the triplet state: picosecond time-resolved absorption spectroscopy on the 7-cis, 11-cis, and 13-cis isomers and high-performance liquid chromatography analysis of photoisomerization

N. Mataga, Y. Koyama, Y. Hirata, 1988 .

Picosecond time-resolved absorption studies of various retinylideneacetaldehyde isomers: cis-trans isomerization in the excited states

N. Mataga, Y. Koyama, Y. Hirata, 1987 .

Natural Selection of Carotenoid Configurations by the Reaction Center and the Light-Harvesting Complex of Photosynthetic Bacteria

Y. Koyama, 1989 .

The resonance raman spectrum of β-carotene in a lipid black-film (bilayer)

Y. Koyama, M. Komori, T. Yoshida, 1982 .

Structures, Excited-State Properties and Functions of Carotenoids in Photosynthesis

Y. Koyama, 1995 .

CONFIGURATIONS OF NEUROSPORENE ISOMERS ISOLATED FROM THE REACTION CENTER AND THE LIGHT‐HARVESTING COMPLEX OF Rhodobacter spheroides G1C. A RESONANCE RAMAN, ELECTRONIC ABSORPTION, AND 1H‐NMR STUDY

Y. Koyama, M. Kanaji, T. Shimamura, 1988 .

Solvent effects on the resonance Raman spectra of bacteriochlorophyll a cation radical

K. Itoh, Y. Koyama, L. Limantara, 1995 .

Picosecond Resonance-Raman Spectroscopy of the Reaction Center of Rhodobacter sphaeroides R26

K. Itoh, Y. Koyama, Y. Misono, 1994 .

Isolation and purification of the reaction center (RC) and the core (RC-LH1) complex from Rhodobium marinum: the LH1 ring of the detergent-solubilized core complex contains 32 bacteriochlorophylls.

R. Cogdell, Y. Koyama, R J Cogdell, 2000, Plant & cell physiology.

Excited-state properties and physiological functions of biological polyenes: the triplet-excited region of retinoids and carotenoids

Yasushi Koyama, Yumiko Mukai, Michitaka Kuki, 1993, Other Conferences.

Raman spectra and conformations of the cis-unsaturated fatty-acid chains

K. Ikeda, Y. Koyama, 1980 .

Raman spectra of all-trans-β-apo-8′-carotenal in the S1 and T1 states; a picosecond pump-and-probe technique using ML-Qs pulse trains

H. Hashimoto, Y. Koyama, 1989 .

High-performance liquid chromatography of cis—trans isomers of neurosporene: discrimination of cis and trans configurations at the end of an open conjugated chain

H. Hashimoto, Y. Koyama, T. Shimamura, 1990 .

Natural Selection of Carotenoid Configurations by Light-Harvesting Complexes and Reaction Centers: Configurational Dependence of Excited-State Properties

Y. Koyama, 1995 .

Fluorescence spectroscopy of 13′‐cis‐spheroidene at 170 K: A reason for the natural selection of the all‐trans configuration for the light‐harvesting function

Y. Koyama, Yasutaka Watanabe, Yue-shun Jiang, 1995 .

Solvent Effects and Vibronic Couplings of ag-Type Stretching Vibrations in T1-Bacteriochlorophyll a and S0- and S1-Spheroidene: Environment of these Pigments in the LH2 Complex of Rhodobacter sphaeroides

Y. Koyama, H. Nagae, M. Kuki, 1994 .

The 2 1Ag− state and two additional low-lying electronic states of spheroidene newly identified by fluorescence and fluorescence-excitation spectroscopy at 170 K

Y. Koyama, Yasutaka Watanabe, M. Kuki, 1993 .

TRANSIENT RAMAN SPECTROSCOPY OF^ N-SUBSTITUTED BACTERIOCHLOROPHYLL a: AN EMPIRICALASSIGNMENT OF T_1 RAMAN LINES

H. Scheer, Y. Koyama, I. Katheder, 1994 .

SOLVENT EFFECTS ON TRIPLET‐STATE BACTERIOCHLOROPHYLL a AS DETECTED BY TRANSIENT RAMAN SPECTROSCOPY AND THE ENVIRONMENT OF BACTERIOCHLOROPHYLL a IN THE LIGHT‐HARVESTING COMPLEX OF Rhodobacter sphaeroides R26

Y. Koyama, H. Nagae, L. Limantara, 1994 .

Raman spectrum of bacteriochlorophyll a in the S1 state

H. Hashimoto, Y. Koyama, E. Nishizawa, 1991 .

Raman spectra of all-trans-β-carotene in the S1 and T1 states produced by direct photoexcitation

H. Hashimoto, Y. Koyama, 1989 .

Vibronic Coupling through the In-Phase, CC Stretching Mode Plays a Major Role in the 2Ag- to 1Ag- Internal Conversion of all-trans-β-Carotene

Jianping Zhang, Y. Koyama, H. Nagae, 2000 .

S1 and T1 species of .beta.-carotene generated by direct photoexcitation from the all-trans, 9-cis, 13-cis, and 15-cis isomers as revealed by picosecond transient absorption and transient Raman spectroscopies

N. Mataga, H. Hashimoto, Y. Koyama, 1991 .

Picosecond Raman spectroscopy of the B830 LH2 complex ofChromatium purpuratum BN 5500

Hideki Hashimoto, Yasushi Koyama, R. Cogdell, 2004, Photosynthesis Research.

Sub-picosecond time-resolved absorption spectroscopy of all-trans-neurosporene in solution and bound to the LH2 complex from Rhodobacter sphaeroides G1C

T. Inaba, Jianping Zhang, Y. Koyama, 2000 .

15-Cis-β-carotene found in the reaction center of spinach Photosystem I

G. Bialek-Bylka, Y. Koyama, K. Yumoto, 1996, Photosynthesis Research.

Presence and absence of electronic mixing in shorter-chain and longer-chain carotenoids: Assignment of the symmetries of 1Bu- and 3Ag- states located just below the 1Bu+ state

Chunyong Li, Yoshinori Kakitani, Y. Koyama, 2007 .

Singlet internal conversion processes in the order of 1Bu+→3Ag-→1Bu-→2Ag-→1Ag- in all-trans-spheroidene and lycopene as revealed by subpicosecond time-resolved Raman spectroscopy

H. Tamura, F. S. Rondonuwu, Yoshinori Kakitani, 2006 .

Excited-state dynamics of the 1Bu+,3Ag−, and 1Bu− states in a carotenoid molecule by 5-fs absorption spectroscopy

Takayoshi Kobayashi, F. S. Rondonuwu, Y. Koyama, 2005 .

Light-harvesting function of carotenoids in photo-synthesis: the roles of the newly found 1(1)Bu- state.

F. S. Rondonuwu, Y. Koyama, R. Fujii, 2004, Biopolymers.

Internal conversion of 1Bu+ → 1Bu− → 2Ag− and fluorescence from the 1Bu− state in all-trans-neurosporene as probed by up-conversion spectroscopy

T. Inaba, Y. Koyama, H. Nagae, 2004 .

Two different pathways of internal conversion in carotenoids depending on the length of the conjugated chain

T. Inaba, Jianping Zhang, Y. Koyama, 2003 .

Excited-state dynamics among the 1Bu+, 1Bu− and 2Ag− states of all-trans-neurosporene as revealed by near-infrared time-resolved absorption spectroscopy

Yasushi Koyama, Toru Inaba, T. Inaba, 2000 .

S1 and T1 Species of β-Carotene Generated by Direct Photoexcitation from the all-trans, 9-cis, 13-cis, and 15-cis Isomers as Revealed by Picosecond Transient Absorption and Transient Raman Spectroscopies

N. Mataga, H. Hashimoto, Y. Koyama, 1991 .

The environment of the four nitrogen atoms of bacteriochlorophyll a in solutions as revealed by 15N NMR spectroscopy

H. Scheer, H. Utsumi, Y. Koyama, 1995 .

CHANGES IN THE CARBON-CARBON AND CARBON-NITROGEN BOND ORDERS IN THE MACROCYCLE OF CHLOROPHYLL A UPON SINGLET AND TRIPLET EXCITATION AS PROBED BY RESON ANCE RAMAN SPECTROSCOPY OF NATURAL-ABUNDANCE AND SINGLY AND DOUBLY LABELED SPECIES WITH 15N, 13C, AND 2H ISOTOPES

S. Miyachi, N. Kurano, Y. Koyama, 1998 .

1H NMR Spectra of the all-trans (I), 7-cis, 9-cis, 13-cis and 15-cis Isomers of β-Carotene: Elongation of the Double Bond and Shortening of the Single Bond Toward the Center of the Conjugated Chain as Revealed by Vicinal Coupling Cons

H. Hashimoto, Y. Koyama, T. Shimamura, 1989 .

Triplet-state conformational changes in 15-cis-spheroidene bound to the reaction center from Rhodobacter sphaeroides 2.4.1 as revealed by time-resolved EPR spectroscopy: strengthened hypothetical mechanism of triplet-energy dissipation.

A. Angerhofer, Yoshinori Kakitani, Y. Koyama, 2006, Biochemistry.

Raman spectra and conformation of the glycerophosphorylcholine headgroup.

Y. Kyōgoku, Y. Koyama, Y Koyama, 1977, Chemistry and physics of lipids.

Efficient light harvesting through carotenoids

K. Schulten, T. Ritz, A. Damjanovic, 2004, Photosynthesis Research.

Emerging techniques Efficient light harvesting through carotenoids

K. Schulten, T. Ritz, A. Damjanovic, 2001 .

Time-dependent Changes in the Carotenoid Composition and Preferential Binding of Spirilloxanthin to the Reaction Center and Anhydrorhodovibrin to the LH1 Antenna Complex in Rhodobium marinum¶

K. Saiki, Y. Koyama, P. Qian, 2001 .

15-cis-beta-carotene found in the reaction center of spinach photosystem II.

T. Tomo, G. Bialek-Bylka, K. Satoh, 1995, FEBS letters.

Time-Resolved Resonance Raman Spectroscopy of Triplet β-Carotene Produced from All-trans, 7-cis, 9-cis, 13-cis, and 15-cis Isomers and High-Pressure Liquid Chromatography Analyses of Photoisomerization via the Triplet State.

H. Hashimoto, Y. Koyama, 1988 .

15-CIS-β-CAROTENE FOUND IN THE REACTIONCENTER OF PHOTOSYSTEM II

T. Tomo, K. Satoh, Y. Koyama, 1995 .

A novel photoproduct of peridinin, A 6S allenic isomer

Y. Koyama, T. Shimamura, Keiko Suzuki, 1992 .

Structure of the light-harvesting bacteriochlorophyll c assembly in chlorosomes from Chlorobium limicola determined by solid-state NMR

T. Fujiwara, H. Akutsu, Yoshinori Kakitani, 2007, Proceedings of the National Academy of Sciences.

Transient Absorption from the 1Bu+ State of All-trans-β-carotene Newly Identified in the Near-infrared Region¶

L. Skibsted, Jianping Zhang, Y. Koyama, 2001, Photochemistry and photobiology.

Vibrational Relaxation and Redistribution in the 2Ag- State of all-trans-Lycopene As Revealed by Picosecond Time-Resolved Absorption Spectroscopy

Jianping Zhang, Y. Koyama, H. Nagae, 1998 .

Conjugation-length dependence of the T1 lifetimes of carotenoids free in solution and incorporated into the LH2, LH1, RC, and RC-LH1 complexes: possible mechanisms of triplet-energy dissipation.

H. Sogabe, Yoshinori Kakitani, Y. Koyama, 2007, Biochemistry.

Near-infrared time-resolved study of the S-1 state dynamics of the carotenoid spheroidene

V. Sundström, H. Frank, D. Zigmantas, 2001 .

Role of amino-acid sidechains in electron-transfer reactions in reaction center of rhodopseudomonas viridis as revealed by extended hückel molecular orbital calculations

T. Okada, Y. Koyama, H. Nakagawa, 1995 .

The 1Bu+→3Ag-→1Bu-→2Ag- internal conversion in carotenoids following the energy-gap law identified by 5 fs spectroscopy

Takayoshi Kobayashi, A. Yabushita, F. S. Rondonuwu, 2006 .

Energies and excited-state dynamics of 1Bu+, 1Bu- and 3Ag- states of carotenoids bound to LH2 antenna complexes from purple photosynthetic bacteria

T. Miki, Yoshinori Kakitani, Y. Koyama, 2009 .

Vibrational relaxation on the mixed vibronic levels of the 1Bu+ and 1Bu- states in all-trans-neurosporene as revealed by subpicosecond time-resolved, stimulated emission and transient absorption spectroscopy

Chunyong Li, Y. Koyama, H. Nagae, 2007 .

Excited-state dynamics of overlapped optically-allowed 1B(u)+ and optically-forbidden 1B(u)- or 3A(g)- vibronic levels of carotenoids: possible roles in the light-harvesting function.

Yoshinori Kakitani, Y. Koyama, H. Nagae, 2012, Acta biochimica Polonica.

Vibrational relaxation and internal conversion in the overlapped optically-allowed 1Bu+ and optically-forbidden 1Bu- or 3Ag- vibronic levels of carotenoids: Effects of diabatic mixing as determined by Kerr-gate fluorescence spectroscopy

T. Miki, Y. Kanematsu, Yoshinori Kakitani, 2009 .

Theoretical description of diabatic mixing and coherent excitation in singlet-excited states of carotenoids

Yoshinori Kakitani, Y. Koyama, H. Nagae, 2009 .

Stimulated emission from the 1Bu-(0) level and the 1Bu+(0) + 1Bu- (1 and 2) diabatic levels upon excitation to the 1Bu+(0) level in neurosporene and spheroidene

T. Miki, Yoshinori Kakitani, Y. Koyama, 2008 .

Rates of the initial two steps of electron transfer in reaction centers from Rhodobacter sphaeroides as determined by singular-value decomposition followed by global fitting

Yoshinori Kakitani, Y. Koyama, H. Nagae, 2010 .

Excitation followed by stimulated-emission from diabatic levels in all-trans- and 15-cis-β-carotenes: Effects of molecular symmetry and solvent polarity

Chunyong Li, Yoshinori Kakitani, Y. Koyama, 2008 .

Generation of carotenoid radical cation in the vicinity of a chlorophyll derivative bound to titanium oxide, upon excitation of the chlorophyll derivative to the Qy state, as identified by time-resolved absorption spectroscopy

S. Sasaki, Xiao‐Feng Wang, J. Xiang, 2005 .

Conformations of model compounds of proteins. I. Acetylglycine N‐methylamide

T. Shimanouchi, Y. Koyama, 1968, Biopolymers.

Conformations of model compounds of proteins II. Infrared spectra of n‐acetyl‐amino acid methylamides

T. Shimanouchi, Y. Koyama, T. Tatsuno, 1971, Biopolymers.

Protein structural deformation induced lifetime shortening of photosynthetic bacteria light-harvesting complex LH2 excited state.

Lei Zhang, Guo‐zhen Yang, Luchao Du, 2005, Biophysical journal.

Structural Transformation Among the Aggregate Forms of Bacteriochlorophyll c as Determined by Electronic-Absorption and NMR Spectroscopies: Dependence on the Stereoisomeric Configuration and on the Bulkiness of the 8-C Side Chain‡

Y. Koyama, H. Nagae, T. Mizoguchi, 2000 .

Structural Transformation Among the Aggregate Forms of Bacteriochlorophyll c as Determined by Electronic‐Absorption and NMR Spectroscopies: Dependence on the Stereoisomeric Configuration and on the Bulkiness of the 8‐C Side Chain ‡

Y. Koyama, H. Nagae, T. Mizoguchi, 2000, Photochemistry and photobiology.

Carotenoid-induced cooperative formation of bacterial photosynthetic LH1 complex.

Y. Koyama, L. Fiedor, Junji Akahane, 2004, Biochemistry.

The Structure of the Aggregate Form of Bacteriochlorophyll c Showing the Qy Absorption above 740 nm as Determined by the Ring‐current Effects on 1H and 13C Nuclei and by 1H–1H Intermolecular NOE Correlations

K. Ogura, F. Inagaki, Y. Koyama, 1998, Biospectroscopy.

Dependence of singlet-energy transfer on the conjugation length of carotenoids reconstituted into the LH1 complex from Rhodospirillum rubrum G9

F. S. Rondonuwu, Y. Koyama, L. Fiedor, 2004 .

The structure of an aggregate form of bacteriochlorophyll c showing the Qy absorption at 705 nm as determined by the ring-current effects on 1H and 13C nuclei and by 1H-1H intermolecular NOE correlations.

K. Ogura, F. Inagaki, Y. Koyama, 1999 .

Resonance Raman Spectroscopy

Y. Koyama, 2010 .

Vibrational relaxation pathways in the electronic excited state of carotenoid

Hideki Hashimoto, Ryosuke Nakamura, Yasushi Koyama, 2006 .

Effects of Nonpolar and Polar Solvents on the Qx and QY Energies of Bacteriochlorophyll a and Bacteriopheophytin a

Y. Koyama, H. Nagae, L. Limantara, 1997 .

Dye-Sensitized Solar Cells Based on the Principles and Materials of Photosynthesis: Mechanisms of Suppression and Enhancement of Photocurrent and Conversion Efficiency

T. Miki, Xiao‐Feng Wang, Y. Koyama, 2009, International journal of molecular sciences.

The role of the newly-found 1Bu− state of carotenoid in mediating the 1Bu+-to-2Ag− internal conversion and the excited-state dynamics of carotenoid and bacteriochlorophyll in a bacterial antenna complex

Yasushi Koyama, Toru Inaba, T. Inaba, 2001 .

Partition of carotenoid-to-bacteriochlorophyll singlet-energy transfer through two channels in the LH2 complex from Rhodobacter sphaeroides G1C

T. Inaba, Jianping Zhang, Y. Koyama, 2001 .

Sequential singlet internal conversion of 1Bu+ → 3Ag− → 1Bu− → 2Ag− → (1Ag− ground) in all-trans-spirilloxanthin revealed by two-dimensional sub-5-fs spectroscopy

Takayoshi Kobayashi, F. S. Rondonuwu, Y. Koyama, 2004 .

Two-exciton emission of BIC J-aggregates

K. Yoshihara, V. Kamalov, Y. Koyama, 1994 .

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

Yoshinori Kakitani, Y. Koyama, R. Fujii, 2006 .

ADENYLATE KINASE BOUND TO THE CHROMATOPHORE MEMBRANES OF Rhodobactor spheroides G1C

Y. Koyama, T. Nakano, Hiroaki Utsumi, 1989, Photochemistry and photobiology.

THE 2AG- ENERGY OF CRYSTALLINE ALL-TRANS-SPHEROIDENE AS DETERMINED BY RESONANCE-RAMAN EXCITATION PROFILES

Hideki Hashimoto, Yasushi Koyama, H. Hashimoto, 1998 .

Photocurrents of solar cells sensitized by aggregate-forming polyenes: Enhancement due to suppression of singlet–triplet annihilation by lowering of dye concentration or light intensity

Y. Wada, Xiao‐Feng Wang, Y. Koyama, 2006 .

Mechanism enabling the observation of the formally optically-forbidden 2Ag- and 1Bu- states in resonance-Raman excitation profiles of spheroidene in KBr disc

Yasushi Koyama, Y. Koyama, H. Nagae, 2010 .

Generation of triplet and cation-radical bacteriochlorophyll a in carotenoidless LH1 and LH2 antenna complexes from Rhodobacter sphaeroides.

R. Cogdell, A. Kawamori, Y. Koyama, 1998, Biochemistry.

Spectrally Resolved Femtosecond Nonlinear Spectroscopy for the Study of Vibrational Dynamics of Carotenoid Light Harvesting Molecules

P. Hannaford, L. Dao, Y. Koyama, 2006 .

Assembly of a mixture of isomeric BChl c from Chlorobium limicola as determined by intermolecular 13C-13C dipolar correlations: coexistence of dimer-based and pseudo-monomer-based stackings.

T. Fujiwara, H. Akutsu, Yoshinori Kakitani, 2006, Biochemistry.

Excited-state dynamics of the 1Bu+, 3Ag−, and 1Bu− states in all-trans-spirilloxanthin as revealed by sub-5-fs time-resolved absorption spectroscopy

Takayoshi Kobayashi, F. S. Rondonuwu, Y. Koyama, 2005 .

Isotopic replacement of pigments and a lipid in chlorosomes from Chlorobium limicola: characterization of the resultant chlorosomes.

Yoshinori Kakitani, Y. Koyama, T. Mizoguchi, 2007, Biochemistry.

Cytochrome c electronic structure characterization toward the analysis of electron transfer mechanism.

T. Okada, Y. Koyama, Y Koyama, 1994, Journal of biochemistry.

Mechanisms of Carotenoid-to-Bacteriochlorophyll Energy Transfer in the Light Harvesting Antenna Complexes 1 and 2: Dependence on the Conjugation Length of Carotenoids

Yoshinori Kakitani, Y. Koyama, 2006 .

Mechanism Activating the 21Ag State in all-trans-β-Carotene Crystal to Resonance Raman Scattering

H. Hashimoto, Y. Koyama, Yuzo Mori Yuzo Mori, 1997 .

A resonance Raman and electronic absorption probe of membrane energization. Quinaldine red in cells of Streptococcus faecalis.

W. G. Martin, P. Carey, H. Schneider, 1979, The Journal of biological chemistry.