Since aromatic compounds play very important roles in organic chemistry, much attention has been also paid to the chemistry of silaaromatic compounds. However, there are few reports on the synthesis and isolation of silaaromatic compounds stable at room temperature because of their high reactivity. Very recently, we have successfully synthesized the first stable silabenzene, 2silanaphthalene, a...

The chemistry of complexes with diatomic chalcogen ligands has attracted much attention due to their unique structure, biological interest, potential for hydrogen-transfer catalysis, and synthetic utility as a precursor of new metal cluster complexes. However, since sulfur and selenium ligands have a strong propensity for bridging metal atoms, it is often difficult to prepare their mononuclear ...

Comment on " Accurate relativistic effective potentials for the sixth-row main group elements " [J. Abstract Critical remarks in respect to the Generalized Relativistic Effective Core Potential in the recent article of S. A. Wildman at al. are discussed and shown to be incorrect.'s article [1] deals with a problem of the Relativistic Effective Core Potential (RECP) generation for precise calcul...

The results from various samples reported here show that energy dispersive x-ray spectroscopy is available as an efficient analytical method; one that has emerged from the qualitative and semiquantitative overview analysis phase. Particularly the ability to improve sensitivity or reduce statistical error using optimized excitation has led to an important advancement in capturing the primary sig...

Tracheobronchial disruption is an uncommon but severe complication of double lumen endotracheal tube placement. The physical properties of a double lumen tube (large external diameter and length) make tracheobronchial injury more common than that associated with smaller single lumen endotracheal tubes. Here we present the case of an iatrogenic left main bronchus injury caused by placement of a ...

In this article, in order to demonstrate the pragmatic elements of Rawls’s viewpoint, the developmental path of his A Theory of Justice shall first be investigated. This development has two phases: In the first phase, justice has an ethical-philosophical basis. In A Theory of Justice, this phase is specifically shown under the title of theory of justice. In the second phase, justice has no phil...

Background and Purpose: The contamination by potentially toxic element (PTE) is a common environmental issue in worldwide rivers. The present study examined PTEs concentration in sediments of Talar River which is one of the main rivers in the Sothern Caspian Basin. Materials and Methods: The sediment samples (n= 44) were collected from top 0–5 cm of surface sediment in the main channel and flo...

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