background and aims. the aim of the present study was to compare 1.3% sodium hypochlorite (naocl) in mtad (mixture of tetracycline isomer, acid, and detergent) for the removal of the smear layer and induction of canal erosion. materials and methods. 38 maxillary incisors were divided in three experimental groups of 10 and two positive and negative control groups of each 4 teeth, and prepared us...

The title compound, [Na2(C6H18NSi2)2(C6H16N2)] n , was found to consist of dimeric [Na(NSiMe3)2] units with crystallographically imposed centrosymmetry based upon four-membered NaNNaN rings. The dimers are bridged by N,N,N',N'-tetra-methyl-ethylenediamine ligands, which act in an unusual extended non-chelating coordination mode. This gives a one-dimensional coordination polymer that extends par...

In the title complex, cis-[PdI(2)(C(6)H(16)N(2))], the Pd(II) atom lies on a crystallographic twofold rotation axis and is four-coordinated by the two N atoms of a chelating N,N,N',N'-tetra-methyl-ethylenediamine ligand [Pd-N = 2.125 (3) Å] and two I atoms [Pd-I = 2.5833 (4) Å], displaying a distorted square-planar geometry (r.m.s. deviation = 0.005 Å), imposed by the small bite of the chelatin...

In the title compound, [Ge(C(9)H(11)O)(2)(C(6)H(16)N(2))], the Ge(II) atom is coordinated in a distorted trigonal-pyramidal geometry by two O atoms belonging to two 2,4,6-trimethyl-phenolate ligands and one N atom of a tetra-methyl-ethylenediamine ligand. Comparing the structure with published data of similar compounds shows that the Ge-O bonds are covalent and the Ge-N bond is coordinated.

In the heterometallic title bulky amido complex, [LiNa(C15H21N2Si)2(C6H16N2)], both alkali metal ions are four-coordinated with distorted tetra-hedral geometries. The Li(+) ion is N,N'-chelated by the N-silylated amido ligand, with Li-N = 2.015 (5) and 2.074 (5) Å. The two amido ligands are arranged cis to each other. The mol-ecule exhibits a twofold rotational symmetry operation along the Li-N...

1 The effects of the disodium salt of ethylenediamine tetra-acetate (EDTA) and 1, 2, bis, 2 aminoethoxyethane-NNN'N'-tetra-acetic acid (EGTA) on renin secretion and vascular resistance were studied in the isolated perfused kidney of the rat. 2 Both substances produced a significant increase of renin release 3 In the absence of calcium and magnesium, EDTA still increased rein release and there w...