Near-infrared (NIR) Ytterbium(ΙΙΙ) complexes namely [Yb(dpq)(DMF)2Cl3] (1), [Yb(dppz)(DMF)2Cl3] (2), [Yb(dpq)(ttfa)3] (3) and [Yb(dppz)(ttfa)3] (4) based on photosensitizing antenna: dipyrido-[3,2-d:2′,3′-f]-quinoxaline (dpq), dipyrido-[3,2-a:2′,3′-c]-phenazine (dppz) and 4,4,4-trifluoro-...

The quantitative determination of biomolecules is a basic requisite in biochemistry, food analysis, and clinical analysis. In this paper, a highly sensitive and selective fluorescence method was developed to determine proteins using a metalloporphyrin, terbium-meso-vanillin-metalloporphyrin (T(3...

Terbium (Tb) doped mesoporous bioactive glasses (Tb/MBG) nanospheres were successfully synthesized by a facile sol-gel method using cetyl trimethyl ammonium bromide (CTAB) as the template. Results indicated that Tb/MBG had spherical morphology (100–200 nm), higher specific surface area (250–35...

A new method based on combining terbium-sensitized fluorescence method and magnetic solid-phase extraction (MSPE) was developed for the quantification of alendronate (ALD) in biological samples. The fluorescence intensity of Tb3+-ALD complex was measured at 545 nm following elution from polymer ...

A reaction of terbium chloride hexahydrate and 4-chlorobenzoic acid was used to form a terbium complex on the surface of an alkaline calcium carbonate core. Different concentrations of high-density polyethylene (HDPE) toluene solution were then coated onto the prepared terbium complex/calcium ca...

This paper reports the thermoluminescence (TL) and other optical studies made on terbium-doped KBr crystals X-irradiated at room temperature. Photoluminescence studies confirm the presence of terbium ions in the KBr matrix in their trivalent form. Formation of Z1 centres on F-bleaching of X-irra...

Sorption-luminescent method for terbium determination based on natural Transcarpathian clinoptilolite without using of complex synthetic organic compounds and toxic solvents was proposed. Optimal luminophore preparation conditions are sorption of Tb(III) on zeolite in the borate buffer solution ...

We studied uptake of iron from Fe(III)–diethylenetriamine pentaacetate (DTPA) in isolated rat hepatocytes. This uptake is specific with an affinity of 600 nMand shows an optimum pH of 6. The specificity is indicated by inhibition by ferric citrate and diferric transferrin. Iron uptake from Fe(I...

Iron deficiency occurring in calcareous soil is a problem in various plants. It is well known that some soil bacteria can release organic acids that can decrease the pH of the soil rhizosphere. However, there have been no attempts to study the effects of plant growth promoting rhizobacteria (PGP...

The interaction between thorium and human serum components was studied using difference ultraviolet spectroscopy (DUS), ultrafiltration and high-pressure-anion exchange chromatography (HPAEC) with external inductively conducted plasma mass spectrometry (ICP-MS) analysis. Experimental data are co...

There is a growing interest in the development of new iron ligands as novel promising therapeutic strategies for neurodegenerative disorders. In the article, a new tripodal hexadentate tris(dopamine) ligand, containing three dopamine chelate moieties which were attached to a cyanuric chloride mo...

A new polyaminocarboxylic bis-(3-hydroxy-4-pyridinone), derivative of DTPA, DTPA(PrHP)2, was synthesized starting from maltol by means of a coupling reaction of a protected 3-hydroxy-4-pyridinone and DTPA bis-anhydride. The DTPA(PrHP)2 acid-base behavior was investigated by UV–Vis spectrophotom...

There is significant current interest in the application of magnetic (magnetite or maghemite) nanoparticles functionalised with chelating agents for the environmental remediation of metal contaminated waters and solutions. Whilst there is a body of knowledge about the potential remediation effic...

Enhanced oil recovery (EOR) using low salinity water has been proven experimentally and at the field scale. One of the mechanisms behind recovery enhancement due to low salinity water injection has been related to the change of rock surface charge which might lead to wettability alteration. Low ...

1,6-Hexanediamine (HDA) is a high production volume chemical which is used as an intermediate in the synthesis of paints, resins, inks, and textiles and as a corrosion inhibitor in lubricants. Two-and 13-week studies of the toxicity of the dihydrochloride salt of HDA (HDDC) were conducted in mal...

Etching characteristics of (1 0 0), (0 1 0), (0 0 1), and (1 1 0) surfaces of an important nonlinear crystal `L-arginine hydrobromide monohydrate’ etched in organic acids have been investigated. It has been found that FeCl3 added to propionic acid reduces the tangential etch rate of (1 0 0) and...

SummaryObjectivesA novel, fast and sensitive HPLC method has been developed for the simultaneous bioanalytical determination of Donepezil hydrochloride (DON) and Citalopram hydrobromide (CTP) in raw materials, spiked human plasma and tablets.

A new series of 6-substituted amido, azo or thioureido-quinazolin-4(3H)-one was synthesized and tested for their in-vitro antitumor activity. Compounds 21, 53 and 60 showed broad spectrum antitumor activity with average IC50 values of 6.7, 7.6 and 9.1 μM, respectively compared with methotrexate...

Palladium(II) and nickel(II) complexes with tetradentate ligands derived from pyrrole 2-carboxaldehyde and various diamines have been synthesized and characterized. The complexes are neutral and the coordination around the metal is square-planar; they are able to activate the molecular hydrogen ...

Synthesis and characterization of five amphiphilic ruthenium(II) complexes of the type [Ru(Cn)3].(PF6)2 (Cn = 4,4′-dialkyl-2,2′-bipyridine, n = 5(4,4′-dipentyl), 6(4,4′-dihexyl), 7(4,4′-diheptyl), 8(4,4′-dioctyl), 9(4,4′-dinonyl)) have been investigated. Single crystal X-ray structures of...