Estuarine sediments from a USEPA Superfund site in coastal Georgia were extensively contaminated with Aroclor 1268, a mixture of highly chlorinated polychlorinated biphenyls used by a former chlor-alkali plant. Batch slurries of contaminated sediment were incubated for 1 yr with amendments of 2,...

Iron 2-ethylhexoate is a salt of ferric iron and 2-ethylhexanoic acid. It is incorporated into silicone elastomeric formulations to provide high temperature stability by counteracting oxidative embrittlement. Though metallic salts are commonly used, the reaction of the salt with the siloxane is ...

The alkylation of bromobenzene and toluene on zeolite H-USY (Si/Al 15) was studied using a high-throughput frontal analysis experimental setup. Adsorption properties of the involved components were determined using the batch technique. Reactions were performed using allyl alcohol, allyl acetate,...

Pd(0) nanoparticles ca. 2 nm in diameter were obtained by the reduction of PdCl2 and Pd(OAc)2 in water at 80 °C in the presence of a PVP-stabilizing polymer. Pd(0) NPs were successfully used in the Heck coupling of allyl alcohol with iodo- and bromobenzenes. Iodobenzenes reacted under solventle...

The reactions of 4- and 5-methyl-2,2,2-trichlorobenzo[d]-1,3,2-dioxaphospholes with molecular chlorine in an 1:1 ratio occur selectively to give 4-methyl-2,2,2,5-tetrachloro- and 5-methyl-2,2,2,6-tetrachlorobenzo[d]-1,3,2-dioxaphospholes, which undergo hydrolysis to 4-chloro-3-methyl- and 4-chlo...

Pyrazole derivatives display diverse biological and pharmacological activities. The aim of this study is to investigate the antioxidant properties of a novel pyrazolecarboxamide derivative (4-amino-N-[(4-chlorophenyl)]-3-methyl-1-phenyl-1H-thieno [2, 3-c] pyrazole-5-carboxamide) in African catfi...

Recent reports indicate that the metabollte of quinidine, 3-hydroxyquinidine, is pharmacologically active. It was the primary purpose of this study to determine total and unbound concentrations of quinidine and 3-hydroxyquinidine in 25 patients receiving quinidine for therapoutic purposes. At th...

The asymmetric ligands, 3-aminopropyl(aryl)tellurides (1a, lb) [Ar = Ph (a); C6H4-OMe (b)] and 3-aminopropyl(phenyl)selenide (2) and their complexes with platinum(II) and palladium(II), viz. [PtCl2(1a, lb)] (3, 4), [PtCl2(2)] (5), [PdCl2(1a, 1b)] (6, 7), [PdCl2(2)] (8), [(Me)ClPd(1b)] (9) and [(...

Displacement of cod from [Pt(cod)Cl2] by 2 equiv. of heteroarylphosphorus ligand, PR2R′, in dichloromethane at ambient temperature afforded — but for one exception trans-[Pt(P{2-(N-methylpyrrolyl)}iPr2)2Cl2] (1) — the expected cis complexes, cis-[Pt(P{2-(N-methylpyrrolyl)}Ph2)2Cl2] (2), cis-[...

New compounds containing the 1,1′-bis(dialkylaminophosphino)ferrocene ligands 1,1′-bis(dimethylaminophosphino)ferrocene (dmapf) and 1,1′-bis(diethylaminophosphino)ferrocene (deapf) were prepared and characterized by NMR. The oxidative electrochemistries of these compounds were examined in met...

Two new bis(diphenylphosphino)isopropylphenylamines, (PPh2)2N-C6H4-CH(CH3)2, having the isopropyl substituent at the carbon atom 2 (1) or 4 (2), were prepared by the aminolysis of chlorodiphenylphosphine with isopropyl substituted aniline at the ortho- or para-position, respectively, under anaer...

The synthesis, properties and coordination behaviour of the bis(dipyridylphosphinomethyl)phenyl pincer ligand 1,3-C6H4(CH2PPy2)2 (Py = 2-pyridyl) are reported. The basicity of the phosphorus atoms in the ligand is explored through the synthesis of the phosphine selenide and a protonation study. ...

AimTo compare and evaluate the clinical and radiographic success of four different zinc-oxide integrated root canal obturating materials.

The most important limitation of leached Waelz Oxide from the pyrometallurgical treatment of Electric Arc Furnace Dust (EAFD) is its high fluorine content. This work deals with the reduction of the harmful effects of the Double Leached Waelz Oxide fluorine content in the hydrometallurgical proce...

To understand the mechanism of fluoride removal from the simulated zinc sulfate solution by the La(III)-modified zeolite, the adsorbent was characterized by XRD, SEM and EDS. The effects of absorbent dose and contact time, the adsorption isotherms and the sorption kinetics were investigated. The...

BackgroundThis article highlights a stabilized stannous fluoride (SnF2) dentifrice that, in addition to being efficacious against caries, gingivitis, and dentin hypersensitivity, demonstrates high-performing stain prevention and removal efficacy.

BackgroundThe objective of this study was to compare a stannous fluoride (SnF2) dentifrice (Colgate TotalSF) stabilized with zinc phosphate with a sodium fluoride control dentifrice for gingivitis and plaque control over a 6-month period.

Dental materials that are antimicrobial and acid-resistant can inhibit bacterial colonization and demineralization, thereby preventing caries. Zinc and copper are well-known for their antibacterial effect, as is nanostructured ZnO–CuO composite. Minerals such as fluorine and calcium, can remine...

ObjectiveThe objective of this study was to compare a stabilized stannous fluoride (SnF2) dentifrice with zinc phosphate (Colgate TotalSF) with SnF2 with zinc lactate and control fluoride dentifrices for gingivitis and plaque control over a 6-month period.

ObjectivesTo compare and explore the dose-response of phytate-containing 1150 ppm fluoride toothpastes on model caries lesions and to determine the impact of zinc ions.