Utility of Interchangeable Coordination Modes of ,'-Dialkyl-2,6-pyridinediamide Tridentate Pincer Ligands for Solvent Extraction of Pd(II) and Zr(IV) from High-Level Radioactive Liquid Waste.

A new class of ligands, ,'-dialkyl-2,6-pyridinediamide (DRPDA), has been designed with the specific intention of exhibiting interchangeable diversity in coordination modes, including organometallic interactions, for the purpose of solvent extraction of elements relevant to the proper treatment of high-level radioactive liquid waste (HLLW) generated after nuclear fuel reprocessing. Consequently, DRPDA has been observed to extract Pd(II) and Zr(IV) from HNO(aq) to 1-octanol in nearly quantitative yields when the selected ligand is sufficiently hydrophobic. However, concomitance of some of other HLLW components were also found.

The relationship of tryptase- and chymase-positive mast cells to angiogenesis in stage I non-small cell lung cancer.

Objective: There are two types of human mast cells, tryptase-positive mast cells (MC(T)) and tryptase- and chymase-positive mast cells (MC(TC)). Although MC(T) have been reported to be related to the generation of angiogenesis, little is known about the involvement of MC(TC) in tumor angiogenesis. In this study, to clarify the relationship between MC(TC) and lung cancer angiogenesis, we evaluated MC(TC), MC(T), and microvessel counts in normal, border, and central lung cancer regions.

Body mass index can predict left ventricular diastolic filling in asymptomatic obese children.

To examine the effects of body mass index on left ventricular diastolic function, flow velocity patterns of the pulmonary vein and mitral valve were measured by pulse Doppler echocardiography in 21 asymptomatic obese children and were compared with those of an age-matched control population. The degree of obesity was calculated as (actual body mass index/ideal body mass index -1) x 100. The pulmonary venous flow indexes were peak systolic (S) and diastolic (D) velocities and peak D/S.

Coronary blood flow assessed by transthoracic echocardiography in neonates.

Coronary flow measurement has provided useful clinical and physiologic information. However, there is little information about values for coronary flow in normal neonates, much less neonates with congenital heart disease. The aim of this study was to assess coronary blood flow in normal neonates and to compare the results with those in infants with ventricular septal defect.

Tissue doppler imaging of left and right ventricles in normal children.

Tissue Doppler imaging is a new ultrasound technology that derives measurements of contraction and relaxation velocities directly from the myocardium. However, data on myocardial velocities by using tissue Doppler imaging have not been established in normal children. In 48 normal children, myocardial velocities were measured using tissue Doppler imaging at three different sites (base, middle, and apex) in the left and right ventricles and the interventricular septum.