| pubmed-article:3593871 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C0025663 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C0025255 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C0205093 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C0012222 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C0016315 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C2603343 | lld:lifeskim |
| pubmed-article:3593871 | lifeskim:mentions | umls-concept:C1707429 | lld:lifeskim |
| pubmed-article:3593871 | pubmed:issue | 5 | lld:pubmed |
| pubmed-article:3593871 | pubmed:dateCreated | 1987-8-10 | lld:pubmed |
| pubmed-article:3593871 | pubmed:abstractText | The Stern-Volmer theory, in which the quantum yield ratio (Io/I) depends linearly on the quencher concentration, will typically be inapplicable to fluorescence quenching in membranes. Numerical analysis shows that diffusion-controlled quenching results in a nonlinear concentration dependence for diffusion coefficients less than or of the order of 10(-6) cm2 s-1 and probe fluorescence lifetimes in the region of 10-100 ns. Lateral diffusion coefficients in membranes are typically overestimated an order of magnitude or more by the Stern-Volmer theory. An alternative empirical method is presented, which represents nonlinear concentration curves by a single parameter linear approximation determined by a least-squares analysis. The fitting parameter, P, depends on the interaction distance, the membrane thickness, the maximum extent of quenching and, in the case of biexponential probe fluorescence decay, the fluorescence kinetic parameters. P is presented in tabular form for a useful range of these parameters. The method is used to estimate diffusion coefficients for plastoquinone and plastoquinol from pyrene fluorescence quenching in soya bean phosphatidylcholine liposomes. It is found that the diffusion coefficients are nearly equal and in the region of 1.3-3.5 X 10(-7) cm2 s-1 for interaction radii of 1.5-0.5 nm, respectively. | lld:pubmed |
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| pubmed-article:3593871 | pubmed:language | eng | lld:pubmed |
| pubmed-article:3593871 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:3593871 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:3593871 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:3593871 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:3593871 | pubmed:month | May | lld:pubmed |
| pubmed-article:3593871 | pubmed:issn | 0006-3495 | lld:pubmed |
| pubmed-article:3593871 | pubmed:author | pubmed-author:BarberJJ | lld:pubmed |
| pubmed-article:3593871 | pubmed:author | pubmed-author:GounarisKK | lld:pubmed |
| pubmed-article:3593871 | pubmed:author | pubmed-author:BlackwellM... | lld:pubmed |
| pubmed-article:3593871 | pubmed:author | pubmed-author:ZaraS JSJ | lld:pubmed |
| pubmed-article:3593871 | pubmed:issnType | Print | lld:pubmed |
| pubmed-article:3593871 | pubmed:volume | 51 | lld:pubmed |
| pubmed-article:3593871 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:3593871 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:3593871 | pubmed:pagination | 735-44 | lld:pubmed |
| pubmed-article:3593871 | pubmed:dateRevised | 2009-11-18 | lld:pubmed |
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| pubmed-article:3593871 | pubmed:year | 1987 | lld:pubmed |
| pubmed-article:3593871 | pubmed:articleTitle | A method for estimating lateral diffusion coefficients in membranes from steady-state fluorescence quenching studies. | lld:pubmed |
| pubmed-article:3593871 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:3593871 | pubmed:publicationType | Research Support, U.S. Gov't, P.H.S. | lld:pubmed |
| pubmed-article:3593871 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
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