Publications by authors named "A N Coly"
Article Synopsis
- The widespread use of pesticides necessitates effective monitoring of surface water quality, but traditional methods are complex, costly, and time-consuming.
- The proposed solution involves a novel photoinduced fluorescence method paired with a lightweight database that simplifies pesticide identification by using combined spectra.
- This system enables on-line monitoring and accurate identification of pesticides in surface water, making it accessible for untrained users and demonstrating promising analytical performance.
The effect of adding organized supramolecular systems such as β-cyclodextrin (β-CD) and hydroxypropyl-β-cyclodextrin (HP-β-CD) on the photochemically-induced fluorescence (PIF) spectral properties of -fluvalinate (TFV) in aqueous solutions was examined. The influence of pH, UV irradiation time and photoproduct stability on the cyclodextrin-enhanced photochemically-induced fluorescence intensity was also investigated. The spectral changes associated with the inclusion process yielded values for the formation constants of TFV inclusion complexes between 450 and 640 M, which were calculated using the nonlinear iterative regression approach least squares.
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- The main treatment for short bowel syndrome is getting nutrition at home through a special method called parenteral nutrition, but patients need to follow strict rules to avoid problems.
- Some patients prefer to receive help from nurses rather than being completely responsible for their care, even though doctors encourage everyone to learn how to do it themselves.
- Interviews with patients showed that while some enjoy having more control over their care, others feel safer and more comfortable when a nurse visits them regularly.
In this work, analytical study of carbofuran (CAF) and fluometuron (FLM) pesticides was carried out using direct spectrofluorimetric method in various solvents. Results showed that CAF and FLM are naturally fluorescent in all solvents under study including organic (MeOH, MeCN, DMF) and aqueous micellar one (CTAC, SDS, Brij-700). For the analysis of FLM, CTAC give the best fluorescence signal enhancement.
View Article and Find Full Text PDFAnalysis of non-native fluorescent pesticides by thermo-induced and photo-induced fluorescence, a comparative study.
Spectrochim Acta A Mol Biomol Spectrosc
December 2023
This paper compares the performance of three analytical methods for the determination of pesticides in natural waters. As many pesticides are non-fluorescent, they are transformed into highly fluorescent by-products in two ways: elevated temperature in an alkaline medium (thermo-induced fluorescence - TIF); or UV irradiation in water (photo-induced fluorescence - PIF). The first method studied uses TIF, the second one uses PIF and the third one uses an automatic sampling and analysing PIF system.
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