Temat: 33.55.Ad - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Circular Dichroism Study of the Light-Harvesting PCP Complexes Within the Vibronic Multistate Dimer Theory
Autorzy:: Pilch, M.
Pawlikowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/1887493.pdf
Data publikacji:: 1991-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 33.55.Ad
33.10.Lb
Opis:: Chiral properties of peridinin-chlorophyll-protein (PCP) light-harvesting complexes are studied in terms of vibronic dimer theory previously applied to study certain structural aspects of α-crustacyanin pigments. On the base of CD spectra it is shown that the peridinin dimer acts as a chiral group in PCP complexes and its geometrical structure is such that the peridinin monomers cannot be coplanar. Certain observations concerning the energy transfer process in PCP complexes in vivo are also made.
Źródło:: Acta Physica Polonica A; 1991, 79, 5; 619-626
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Three-Particle Recombination at Low Temperature: a QED Approach
Autorzy:: Bhattacharyya, S.
Roy, A.
Powiązania:: https://bibliotekanauki.pl/articles/2027431.pdf
Data publikacji:: 2001-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 32.80.Fb
33.55.Ad
Opis:: A theoretical study of the three-body recombination of proton and electron in presence of a spectator electron with electronic beam at near-zero temperature is presented using field theory and invariant Lorentz gauge. Contributions from the Feynman diagrams of different orders give an insight into the physics of the phenomena. Recombination rate coefficient is obtained for low lying principal quantum number n=1 to 10. At a fixed ion beam temperature (300 K) recombination rate coefficient is found to increase in general with n, having a flat and a sharp peak at quantum states 3 and 5, respectively. In absence of any other theoretical and experimental results for low temperature formation of H-atom by three-body recombination at low lying quantum states, we have presented the theoretical results of Stevefelt and group for three-body recombination of deuteron with electron along with the present results. Three-body recombination of antihydrogen in antiproton-positron plasma is expected to yield similar result as that for three-body recombination of hydrogen formation in proton-electron plasma. The necessity for experimental investigation of low temperature three-body recombination at low quantum states is stressed.
Źródło:: Acta Physica Polonica A; 2001, 100, 1; 23-40
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Circular Dichroism Spectra of Axially Oriented Rhodospirillum rubrum Cells and Their Fragments Immobilized in Polymer Film
Autorzy:: Cegielski, Roman
Frąckowiak, Danuta
Liang, Jim
Powiązania:: https://bibliotekanauki.pl/articles/1887328.pdf
Data publikacji:: 1991-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 87.15.Mi
33.55.Ad
Opis:: Circular Dichroism (CD) spectra of Rhodospirillum rubrum cells, and their fragments embedded in isotropic and uniaxially oriented by stretching polyvinyl alcohol films were measured. Effects responsible for CD signal generation such as assymetry of chromophores itself, the helical organisation of lamellar system, the helical texture of stretched PVA matrix, the contribution from circular and linear birefringence, as well as from exciton splitting resulting from pigments mutual interactions are discussed.
Źródło:: Acta Physica Polonica A; 1991, 79, 4; 479-491
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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