Temat: spirilloxanthin - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Femtosecond stimulated Raman spectroscopy of the dark S1 excited state of carotenoid in photosynthetic light harvesting complex
Autorzy:: Yoshizawa, Masayuki
Nakamura, Ryosuke
Yoshimatsu, Orihiro
Abe, Kenta
Sakai, Shunsuke
Nakagawa, Katsunori
Fujii, Ritsuko
Nango, Mamoru
Hashimoto, Hideki
Powiązania:: https://bibliotekanauki.pl/articles/1039771.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: spirilloxanthin
light-harvesting
femtosecond stimulated Raman spectroscopy
carotenoid
reconstituted LH1
vibrational dynamics
Opis:: Vibrational dynamics of the excited state in the light-harvesting complex (LH1) have been investigated by femtosecond stimulated Raman spectroscopy (FSRS). The native and reconstituted LH1 complexes have same dynamics. The ν1 (C=C stretching) vibrational mode of spirilloxanthin in LH1 shows ultrafast high-frequency shift in the S1 excited state with a time constant of 0.3 ps. It is assigned to the vibrational relaxation of the S1 state following the internal conversion from the photoexcited S2 state.
Źródło:: Acta Biochimica Polonica; 2012, 59, 1; 49-52
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Polarization angle dependence of stark absorption spectra of spirilloxanthin bound to the reconstituted LH1 complexes using LH1-subunits isolated from the purple photosynthetic bacterium Rhodospirillum rubrum
Autorzy:: Horibe, Tomoko
Nakagawa, Katsunori
Kusumoto, Toshiyuki
Fujii, Ritsuko
Cogdell, Richard
Nango, Mamoru
Hashimoto, Hideki
Powiązania:: https://bibliotekanauki.pl/articles/1039786.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: spirilloxanthin
Rhodospirillum rubrum
Stark absorption spectroscopy
polarization angle dependence
reconstitution
carotenoid
LH1 complex
Opis:: Reconstituted LH1 complexes were prepared using the LH1 subunit-type complexes, isolated from the purple photosynthetic bacterium Rhodospirillum (Rs.) rubrum, and purified all-trans spirilloxanthin. Stark absorption spectra of spirilloxanthin bound to both the native and reconstituted LH1 complexes were compared in different polarization angles (χ) against the external electric field. From the polarization angle dependence of the Stark absorption spectra, two angles were determined in reference to the direction of transition dipole moment (m) of spirilloxanthin: one is the change in polarizability upon photoexcitation (Δα), θΔα and the other is the change in static dipole moment upon photoexcitation (Δμ), θΔμ. Despite the symmetric molecular structure of all-trans spirilloxanthin, its Stark absorption spectra show pronounced values of Δμ. This large Δμ values essentially caused by the effect of induced dipole moment through Δα both in the cases for native and reconstituted LH1 complexes. However, slightly different values of θΔα and θΔμ observed for the native LH1 complex suggest that spirilloxanthin is asymmetrically distorted when bound to the native LH1 complex and gives rise to intrinsic Δμ value.
Źródło:: Acta Biochimica Polonica; 2012, 59, 1; 97-100
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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