Background: Calcium phosphates (CPs) form hydroxyapatite (HA) in physiological solutions. These are commonly used to treat dentine hypersensitivity (DH) as they mimic the mineral composition of natural tooth. Aim: The present study aims characterise apatite formation ability a commercially available calcium phosphate TeethmateTM (TM) physiological-like media. Materials and Methods: In this stud...

A series of new hyperbranched polymers containing a 2,4,6-tris(thiophen-2-yl)-1,3,5-triazine core unit and polyfluorene chain arms have been synthesized via Suzuki coupling, and characterized by NMR, IR and GPC. All the polymers exhibit good thermal stability with a high decomposition temperature. By changing the 2,4,6-tris(thiophen-2-yl)-1,3,5-triazine/fluorene ratio the UV-vis absorption and ...

The skeletal isoenzyme of human alkaline phosphatase was partially purified from the serum of a patient with Paget’s disease. The pH dependence of the reaction with p-nitrophenyl phosphate (PNPP) suggests that either the reaction mechanism involves 2 dissociable residues on the enzyme (8.75 > pK1 > 8.2; 9.35 > pKz > 8.75), or that the monoanion is the active form of the phosphoryl substrate. In...

Environmental chemicals with estrogenic activities have been suggested to be associated with deleterious effects in animals and humans. To characterize estrogenic chemicals and their mechanisms of action, we established in vitro and cell culture assays that detect human estrogen receptor [alpha] (hER[alpha])-mediated estrogenicity. First, we assayed chemicals to determine their ability to modul...

The title compound, C(30)H(42)N(4), is an aryl-ated tris-(amino-eth-yl)amine derivative which was obtained by reducing the corresponding tris-amide with AlH(3). The asymmetric unit consists of one third of a C(3v)-symmetric mol-ecule with the tertiary N atom lying on a crystallographic threefold axis.

Unlike many other metal and metalloid ions, tin(II) elicits intense, analytically useful chemiluminescence upon reaction with tris(2,2'-bipyridyl)ruthenium(III) in acidic aqueous solution. This finding provides new insight into the nature of this widely used reagent and has enabled the first direct, selective determination of a metal ion with tris(2,2'-bipyridyl)ruthenium(III).

Simple borates serve as effective promoters for amide bond formation with a variety of carboxylic acids and amines. With trimethyl or tris(2,2,2-trifluoroethyl) borate, amides are obtained in good to excellent yield and high purity after a simple work-up procedure. Tris(2,2,2-trifluoroethyl) borate can also be used for the straightforward conversion of primary amides to secondary amides via tra...

A new tris(pyrazolyl)borate ligand bearing phosphine donor groups appended to the 3-position of the pyrazolyl rings is reported, and the hemilabile behaviour of this tris-N,P ligand in coordination with K+, Tl+ and Cu+ ions is investigated.

Mononuclear [Ir{ArNC(NR2)NAr}(C8H14)2] complexes (where R = Me or Et; Ar = Ph or 4-MeC6H4; and C8H14 = cis-cyclooctene) were synthesized from the neutral N,Ndialkyl-N′,N′′-diarylguanidines via deprotonation and transmetalation. As confirmed by single-crystal structure determination, the guanidinato(1−) ligands coordinate the lowvalent d Ir center in an N,N′-chelating binding mode, and the C−N d...

Irradiation of a toluene solution containing cyclopentadienone tricarbonyl iron complexes and isocyanides with blue LEDs afforded the formation isolation 12 triisocyanide complexes, two which, namely tris(2,6-dimethylphenyl isocyanide)(η 4 -tetraphenylcyclopenatedienone)iron, [Fe(C 9 H N) 3 (C 29 20 O)], tris(naphthalen-2-yl -tetraphenylcyclopenatedienone)iron acetone hemisolvate, 11 7 O)] 2 ·C...