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Journal of Environmental Pathology, Toxicology and Oncology

Erscheint 4 Ausgaben pro Jahr

ISSN Druckformat: 0731-8898

ISSN Online: 2162-6537

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.4 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 2.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.5 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00049 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.59 SJR: 0.429 SNIP: 0.507 CiteScore™:: 3.9 H-Index: 49

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Cell-Substrate Topology upon ALA-PDT Using Variable-Angle Total Internal Reflection Fluorescence Microscopy (VA-TIRFM)

Volumen 26, Ausgabe 2, 2007, pp. 83-88
DOI: 10.1615/JEnvironPatholToxicolOncol.v26.i2.30
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ABSTRAKT

Because of the low penetration depth of an evanescent electromagnetic field, total internal reflection fluorescence microscopy (TIRFM) proved to be a powerful technique to examine fluorescent dyes or photosensitizers in close vicinity to the plasma membrane of living cells. In addition, on variation of the angle of incidence of exciting laser light, the penetration depth is varied, so that cell-substrate topology can be examined with nanometer resolution. Using a specific illumination device for TIRFM and a highly sensitive electron multiplying (EM) CCD camera, fluorescence of the photosensitizer protoporphyrin IX (PPIX) was studied in human cancer cells after application of 5-aminolevulinic acid (5-ALA) prior to and after irradiation with sublethal light doses (635 nm, 4 J/cm2). For cells growing on microscope cover slides, cell-substrate distances varied between approximately 20 and 250 nm with a mean distance of approximately 120 nm. On light exposure, these distances generally decreased, and a mean value below 100 nm was attained. Moreover, focal contacts visualized with a fusion protein of yellow fluorescent protein and focal adhesion kinase were maintained on light exposure, i.e., light-induced detachment of cells from their substrate was not likely to occur.

REFERENZIERT VON
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