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Precise CCD image analysis for planar laser-induced fluorescence experiments
, Article Optics and Laser Technology ; Volume 38, Issue 3 , 2006 , Pages 152-161 ; 00303992 (ISSN) ; Sharif University of Technology
2006
Abstract
The goal of this paper is to describe essential criteria for image analysis of planar laser-induced fluorescence (PLIF) signals. A new image file conversion method is introduced and some typical illustrative examples showing the potential applications of the method in PLIF experiments are presented. Analysis of row, column, and total pixel counts, and the dark noise related to an image are discussed. Image segmentation, averaging and background correction can be easily done by the reported method. In our analysis it is straightforward to inspect the pixel counts and check for saturation of the camera sensors. It is also feasible to obtain a particular row or column for interpretation and it...
Simple and rapid detection of L-dopa based on in situ formation of polylevodopa nanoparticles
, Article Sensors and Actuators, B: Chemical ; Volume 243 , 2017 , Pages 715-720 ; 09254005 (ISSN) ; Moslehipour, A ; Bigdeli, A ; Sharif University of Technology
Elsevier B.V
2017
Abstract
Levodopa [L-3, 4-dihydroxyphenylalanine, or L-DOPA] is an important neurotransmitter used for the treatment of neural disorders such as Parkinson's disease. Abnormal L-Dopa concentrations in biological fluids can be used for the evaluation of such diseases. In this work, a rapid and sensitive method for L-DOPA detection has been reported which is based on in situ formation of polylevodopa nanoparticles. Under alkaline conditions, L-DOPA is spontaneously oxidized to its quinone derivative and shows fluorescence properties. The fluorescence signal of the oxidation product has been monitored and used for the determination of L-DOPA in the presence of dopamine, uric acid, ascorbic acid and other...