Inhibitory effects of some synthesized dihydroxycoumarin compounds on purified G6PD were investigated. For this purpose, initially humanerythrocyte G6PD was purified 7069-fold in a yield of 33.6% by using ammonium sulfate precipitation and affinity chromatography which includes 2',5'-ADP Sepharose 4B. The purified enzyme showed a single band on sodium dodecyl sulfate-polyacrylamide gel electrophoresis
The synthesis, Na+ binding properties of new coumarin-crown ethers
作者:Ismet Basaran、Umit Cakir
DOI:10.1007/s10847-013-0286-1
日期:2014.4
o-Dihydroxy-3-(methylphenyl)-chromenones (coumarins; 3a–3c) were synthesized from trimethoxybenzaldehydes through a reaction with the corresponding methylphenyl-acrylonitrile in pyridine·HCl and then H3O+. Dihydroxycoumarins reacted with the ditosylate or dichloride derivatives of tri- or tetraethyleneglycols in the presence of CH3CN/Na2CO3 and macrocyclic ethers with a coumarin moiety were obtained. The chromatographically purified new coumarin-crown ethers (5a–5f) were identified by IR, 1H NMR, and Mass spectrometry. The binding constants of Na+ with the coumarin-crown ethers were determined in an 80 % dioxane/water binary solvent system at 25 °C from conductance measurements.
An ultrasensitive and selective ‘turn off’ fluorescent sensor with simple operation for the determination of trace copper (II) ions in water and various beverage samples
作者:Sukriye Nihan Karuk Elmas、Ibrahim Berk Gunay、Kenan Koran、Furkan Ozen、Duygu Aydin、Fatma Nur Arslan、Ahmet Orhan Gorgulu、Ibrahim Yilmaz
DOI:10.1080/10610278.2019.1702195
日期:2019.12.2
ABSTRACT Considering vital roles of trace copper ions for the health of humans, it is critical to sensitively detect it in foodstuffs. Herein, an ultrasensitive and cost–effective coumarin based fluorescent strategy with a “turn–off” signal was developed for specific detection of trace Cu2+ ions. Synthesis of 6,7-dihydroxy-3-(3-methylphenyl)coumarin (TMAC) probe was performed and characterized. The