کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9607112 | 44584 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Natural anthraquinones probed as Type I and Type II photosensitizers: singlet oxygen and superoxide anion production
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Natural anthraquinones probed as Type I and Type II photosensitizers: singlet oxygen and superoxide anion production Natural anthraquinones probed as Type I and Type II photosensitizers: singlet oxygen and superoxide anion production](/preview/png/9607112.png)
چکیده انگلیسی
The photosensitizing properties of six anthraquinones (AQs): soranjidiol (1), soranjidiol-1-methyl ether (2), rubiadin (3), rubiadin-1-methyl ether (4), damnacanthal (5) and damnacanthol (6), isolated from leaves and stems of Heterophyllaea pustulata Hook. f. (Rubiaceae) were studied. By means of photobiological and photophysical methods in vitro, the type of photosensitization that these metabolites are capable of producing was determined. Whereas the photosensitized generation of superoxide anion radical (O2-) (Type I) was evaluated in leukocyte suspensions, singlet molecular oxygen (1O2) production (Type II) was examined in organic solution. In addition, the quantum yield of 1O2 (Φ) in chloroform was measured for those AQs that generate it. It was established that 4 behaves exclusively as a Type I photosensitizer. By contrast, the others AQs act by both types of mechanisms, among which 5 showed the largest Φ of 1O2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 78, Issue 1, 14 January 2005, Pages 77-83
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 78, Issue 1, 14 January 2005, Pages 77-83
نویسندگان
Susana C. Núñez Montoya, Laura R. Comini, MartÃn Sarmiento, Cecilia Becerra, Inés Albesa, Gustavo A. Argüello, José L. Cabrera,