A series of novel resorcin-[4]arenes with extended pi systems have been synthesised and developed as potassium-selective transporters. Resorcin[4]arenes that feature crown ether moieties function as efficient carriers of K+ across bulk liquid membranes showing enhanced selectivity over the other alkali metal ions relative to a model system (benzo[15]crown-5). Incorporation of functionalities su...

Enantioenriched, highly functionalized cyclopropane derivatives were prepared by a simple and green approach using monosaccharide-based chiral crown ethers as phase transfer catalysts. The Michael-initiated ring closure (MIRC) reactions of diethyl bromomalonate with 2-cyano-3-phenylacrylate took place complete diastereoselectivity in the presence lariat derived from carbohydrates enantioselecti...

Complexes of the anion of the secondary amine 2-phenylaminopyridine (LH) with the heavier alkali metals Na-Cs have been prepared in the presence of various macrocyclic polyether crowns [12-crown-4 (12C4), 15-crown-5 (15C5), and 18-crown-6 (18C6)], which coordinate to the metal ions in all cases. Depending on the combination of alkali metal and crown, the products include separated ion pairs [(c...

The research aimed to determine the effect of sludge and NPK fertilizer their combination gain best result in growth palm oil seedlings main nursery. This used a factorial, completely randomized design. first factor was sludge, which has three dosages: 10 g, 20 30 g per plant. second fertilizer, 5 15 Twenty-seven units trials were obtained from 9 treatment combinations repetitions. Each trial u...

Novel 2-benzothiazole-, 4-pyridine-, and 2- and 4-quinoline-based styryl dyes containing an N-methylbenzoaza-15(18)-crown-5(6)-ether moiety were synthesized. A detailed electronic spectroscopy study revealed high performance of these compounds as optical molecular sensors for alkali and alkaline-earth metal cations. They were shown to considerably surpass analogous chromoionophores based on N-p...

Objective: In this study, it was aimed to determine the age of onset crown calcification third molars in children aged 5-15 years Turkey, and evaluate development status by age.Material Methods: Panoramic radiographs first 1024 patients between ages 5 15 were evaluated. The (calcification) classified according Demirjian method.Results: When stages for maxillary mandibular compared, no statistic...