POLARIZED PHOTOACOUSTIC SPECTRA OF PHYCOERYTHRIN and PHYCOCYANIN IN ANISOTROPIC POLYMER FILMS |
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| Authors: | Danuta Frackowiak Surat Hotchandani G Bialek-Bylka Roger M Leblanc |
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| Institution: | Centre de recherche en photobiophysique, Universitédu Québec àTrois-Rivières, Trois-Rivieres, Québec, G9A 5H7 Canada;Institute of Physics, Poznan Technical University, Poland |
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| Abstract: | Abstract— Photoacoustic spectra (PAS) of biliproteins, namely, R-phycoerythrin (PE) and C-phycocyanin (PC) and their mixture in anisotropic and isotropic polyvinylalcohol (PVA) films were measured under the illumination with polarized and natural light. Also samples in deuterated PVA were investigated. The yields of fluorescence of various chromophores of investigated biliproteins were obtained from PAS, absorption, fluorescence and fluorescence lifetime measurements. The deuteration of samples causes different changes in thermal deactivation of excitation of various chromophores. Ratios of PAS to absorption of the light polarized parallel and perpendicular to the direction of film stretching are different. The PAS amplitude of deuterated samples is higher than that for undeuterated. |
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