Virtual intermediates in photosynthetic electron transfer
نویسندگان
چکیده
منابع مشابه
Excited States, Electron-Transfer Reactions, and Intermediates in Bacterial Photosynthetic Reaction Centers
ragonal transition at the equilibrium state occurs at about 550 OC. Here we have shown that under CH, atmosphere the onset temperature is lowered by at least 150 "C. This result is consistent with the assumption that the out-diffusion rate of oxygen in the YBaCuO compound is limited by a surface barrier of 1.7 eV, which is involved in the surface diffusion of 0species and the further formation ...
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enhancement of the T-d8 concentration relative to EtOH (bulk solution has a value of =0.25) followed by a near-linear decrease after the break. Returning to the Fickian solution and using the slower turn on of the surface concentration could represent the EtOH diffusion into the polystyrene. Figure 9 with a = 1 would be indicative if an induction period was included. That the EtOH is constraine...
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Photosynthesis occurs via electron transfer between pigment molecules or prosthetic groups embedded in a thylakoid membrane protein complex. These pigments form the “conductive pathway” for electron flow and the surrounding protein serves as a“shaping insulator”. Electron transfer through the protein proceeds via quantum tunneling into succesively lower potential wells represented by the pigmen...
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Electron transfer activity in intact trichomes of Spirulina platensis (Nordst.) Geitl. can be observed with either CO(2) or methylviologen as the Hill acceptor. Ferricyanide cannot penetrate the intact trichomes, but photoreduction of this oxidant can be observed when mediated by lipophilic oxidants such as p-phenylenediamine or 2,5-dimethyl-p-benzoquinone. The insensitivity of these reactions ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1992
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(92)81611-9