The asymmetric unit of the title compound, [Pt(C10H5F2N2)(C5H7O2)], comprises one Pt(II) atom, one 2,6-di-fluoro-2,3-bi-pyridine ligand and one acetyl-acetonate anion. The Pt(II) atom adopts a distorted square-planar coordination geometry, being C,N-chelated by the 2,6-di-fluoro-3-(pyridin-2-yl)pyridin-4-yl ligand and O,O'-chelated by the pentane-2,4-dionate ligand. The two pyridine rings of th...

The purpose of the present study was to investigate the appearance of periodontally involved root surfaces after hand scaling and after using two different piezoelectric ultrasonic scalers. Further, the root surfaces were examined by a scanning electron microscope after they have been treated with saline, saturated citric acid, saturated tetracycline hydrochloride or 8% EDTA for 3 minutes. Thir...

Brucella spp. are facultative intracellular pathogens that have the ability to survive and multiply in professional and nonprofessional phagocytes, and cause abortion in domestic animals and undulant fever in humans. The mechanism and factors of virulence are not fully understood. High-affinity zinc uptake system protein mutant (znuA mutant) showed reduced growth in zinc chelated medium, and fa...

New platinum(II) complexes [PtCl(O,O'-acac)(L)] (1) and [Pt(O,O'-acac)(γ-acac)(L)] (2) (L = DMSO, a; DMS, b) containing a single chelated (O,O'-acac) (1), or one chelated and one σ-bonded (γ-acac) acetylacetonate (2) have been synthesized. The new Pt(II) complexes exhibited high in vitro cytotoxicity on cisplatin sensitive and resistant cell lines and showed negligible reactivity with nucleobas...

The asymmetric unit of the title trinuclear Ni(II) compound, [Ni(3)(C(11)H(11)N(2)O(3))(C(5)H(5)N)(4)], contains two independent mol-ecules which are located on individual inversion centres. The central Ni atom, located on an inversion centre, is coordinated by two pyridine N atoms and is further N,O-chelated by two N-(2-methyl-propano-yl)salicyloylhydrazidate anions in an elongated octa-hedral...

The mol-ecule of the title compound, [CuNa(C(18)H(18)N(2)O(4))(ClO(4))(CH(3)OH)], is almost planar with mean deviation of 5.2 (8)°. The coordination environment of the Cu(II) ion is distorted square-planar and it is N(2)O(2)-chelated by the 6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphenolate Schiff base ligand. The Na atom is chelated by the four O atoms of the Schiff bas...

The influence of persulfate activation methods on polycyclic aromatic hydrocarbons (PAHs) degradation was investigated and included thermal, citrate chelated iron, and alkaline, and a hydrogen peroxide (H₂O₂)-persulfate binary mixture. Thermal activation (60 °C) resulted in the highest removal of PAHs (99.1%) and persulfate consumption during thermal activation varied (0.45-1.38 g/kg soil). Per...

The tetra-nuclear title compound, [Cu(2)Ti(2)(C(6)H(6)NO(6))(2)O(O(2))(2)(H(2)O)(10)]·7H(2)O, lies about a twofold rotation axis that passes through the bridging oxide atom. The titanium atom is N,O,O',O''-chelated by the nitrilo-triacetate and O,O'-chelated by the peroidxo group and is coordinated to the bridging O atom in an overall penta-gonal-bipyramidal geometry. The O atom of one of the c...

The divalent cation chelators, ethyleneglycoltetraacetic acid (EGTA) and its magnesium salt, MgEGTA, were compared in studies of alternative complement pathway function. EGTA (0.01 M) inhibited both the rate and the amount of complement activation by zymosan whether compared to nonchelated serum or to serum chelated with MgEGTA (0.01 M). The rate of alternative pathway activation by zymosan was...

A simple and highly efficient protocol using magnetic mesoporous silica nanoparticles (MMSNPs) with metal affinity ligands was developed to directly capture laccase from Trametes versicolor fermentation broth. The Cu(2+)-chelated magnetic mesoporous silica nanoparticles (MMSNPs-Cu(2+)) with pore sizes ranging from 3.6 to 27.1 nm exhibited size selectivity on laccase capture from the fermentatio...