The development of photochemical activities in isolated barley plastids during illumination of dark-grown plants has been studied and compared with the behaviour of plastocyanin, cytochromes f, b-559(LP), b-563 and b-559(HP) and pigments P546 (C550) and P700. Electron-transport activity dependent on Photosystem 1 and cyclic photophosphorylation dependent on N-methylphenazonium methosulphate (ph...

I. Vechiu, H. Camblong, G. Tapia, B. Dakyo, C. Nichita (1) LIPSI-ESTIA, Technopôle Izarbel, 64 210 Bidart, France, [email protected], [email protected], Tel: + 33 (0) 559 438 471, Fax: + 33 (0) 559 438 401 (2) University of Basque Country (UPV-EHU), Spain, [email protected] Tel: + (34) 943 018 682, Fax: + (34) 943 017 130 (3) GREAH – University of Le Havre, France, [email protected], nic...

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Despite many years of study, the physiological role of cytochrome b-559 (Cyt b-559) within the photosystem II (PSII) complex still remains unclear. Here we describe the analysis of a mutant of the green alga Chlamydomonas reinhardtii in which the His ligand to the haem, provided by the alpha subunit, has been replaced by a Cys residue. The mutant is unable to grow photoautotrophically but can a...

We have found that elevated copper concentrations, apart from the inhibition of oxygen evolution, changed the initial states distribution of the oxygen-evolving complex. Already at low concentrations, copper ions oxidized the low-potential form of cytochrome b (559) and also its high-potential form at higher concentrations at which fluorescence quenching was observed. We suggest that the primar...

We demonstrate the operation of a cascaded continuous wave (CW) mode-locked Raman oscillator. The output pulses were compressed from 28 ps at 532 nm down to 6.5 ps at 559 nm (first Stokes) and 5.5 ps at 589 nm (second Stokes). The maximum output was 2.5 W at 559 nm and 1.4 W at 589 nm with slope efficiencies up to 52%. This technique allows simple and efficient generation of short-pulse radiati...

1 Guidelines in Cardiovascular Research; a First for the American Journal of 2 Physiology: Heart and Circulatory Physiology 3 4 Irving H. Zucker 5 University of Nebraska Medical Center 6 Omaha, NE 7 8 9 10 Running title: Guidelines papers 11 12 Correspondence: 13 Irving H. Zucker, Ph.D. 14 Department of Cellular and Integrative Physiology 15 University of Nebraska Medical Center 16 985850 Nebra...