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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4
|
| pubmed:dateCreated |
1979-3-24
|
| pubmed:abstractText |
The noise behavior of lipid bilayer membranes, doped with a chemically dimerized gramicidin A, was investigated. In contrast to normal gramicidin A, which generates a Lorentzian type power spectrum due to the formation and disappearance of conducting dimers, the current power spectrum density Sm(f) obtained with this gramicidin A derivative showed over several orders of magnitude a clear l/f behavior. The intensity of this l/f component was analyzed as a function of the membrane-applied voltage, membrane resistance, electrolyte concentration, and composition. The relationship between the mean-square fluctuation in current and the membrane current mean value was found to follow Hooge's equation, i.e., deltaI2 = alphaI2m/Nf where N is the number of channels and alpha is a constant equal to 1.0 X 10(-2). It is suggested that a l/f type noise was observed because the chemically dimerized form of gramicidin A produces long lasting cation selective channels.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:chemical | |
| pubmed:status |
MEDLINE
|
| pubmed:month |
Nov
|
| pubmed:issn |
0022-2631
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:day |
8
|
| pubmed:volume |
43
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
317-33
|
| pubmed:dateRevised |
2000-12-18
|
| pubmed:meshHeading | |
| pubmed:year |
1978
|
| pubmed:articleTitle |
l/f noise in black lipid membranes induced by ionic channels formed by chemically dimerized gramicidin A.
|
| pubmed:publicationType |
Journal Article
|