کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10533276 | 961861 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A cryogenic optical waveguide spectrometer for the measurement of low-temperature absorption spectra of dilute biological samples
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A cryogenic optical waveguide spectrometer that uses a Teflon-AF 2400 liquid core waveguide is described. In comparison to standard low-temperature absorption techniques, the liquid core waveguide approach not only affords the use of microliter samples but also provides significant improvements in sensitivity. Here we show low-temperature absorption spectra of various flavoproteins, including DNA photolyase, measured using this new technique. The technique has high reproducibility and can afford the detection of 15Â ng of flavoprotein. In addition, the technique requires several hundredfold less protein than standard low-temperature techniques for the same sensitivity. The performance of the spectrometer in the ultraviolet (UV) region is investigated experimentally and compared with standard UV absorption techniques. Results indicate that, below 300Â nm, the observed absorbances deviate from the Beer-Lambert law.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytical Biochemistry - Volume 337, Issue 1, 1 February 2005, Pages 121-129
Journal: Analytical Biochemistry - Volume 337, Issue 1, 1 February 2005, Pages 121-129
نویسندگان
M. Salim U. Siddiqui, Robert J. Stanley,