Light-induced transformations of hematoporphyrin diacetate and hematoporphyrin. 1988

J Rotomskiene, and R Kapociute, and R Rotomskis, and G Jonusauskas, and T Szitó, and A Nizhnik
Vilnius University Laser Research Centre, Lithuania.

Illumination of hematoporphyrin diacetate (HP-Diac) and hematoporphyrin (HP) in phosphate-buffered solutions causes the formation of a stable photoproduct absorbing at 636 nm. Simultaneously the photo-oxidation of HP-Diac and HP takes place. These phototransformations depend on the illumination dose and the concentration of the HP-Diac or HP solution, and cause qualitatively the same spectral changes independently of the light source used.

UI MeSH Term Description Entries
D008027 Light That portion of the electromagnetic spectrum in the visible, ultraviolet, and infrared range. Light, Visible,Photoradiation,Radiation, Visible,Visible Radiation,Photoradiations,Radiations, Visible,Visible Light,Visible Radiations
D010084 Oxidation-Reduction A chemical reaction in which an electron is transferred from one molecule to another. The electron-donating molecule is the reducing agent or reductant; the electron-accepting molecule is the oxidizing agent or oxidant. Reducing and oxidizing agents function as conjugate reductant-oxidant pairs or redox pairs (Lehninger, Principles of Biochemistry, 1982, p471). Redox,Oxidation Reduction
D010777 Photochemistry A branch of physical chemistry which studies chemical reactions, isomerization and physical behavior that may occur under the influence of visible and/or ultraviolet light. Photochemistries
D006415 Hematoporphyrins Iron-free derivatives of heme with 4 methyl groups, 2 hydroxyethyl groups and 2 propionic acid groups attached to the pyrrole rings. Some of these PHOTOSENSITIZING AGENTS are used in the PHOTOTHERAPY of malignant NEOPLASMS. Haematoporphyrin IX,Hematoporphyrin,Hemedonin
D013057 Spectrum Analysis The measurement of the amplitude of the components of a complex waveform throughout the frequency range of the waveform. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Spectroscopy,Analysis, Spectrum,Spectrometry

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