Two new one-dimensional (1-D) Pb(II) coordination polymers, namely, [Pb(3-pdip)(L)]·H2O (1) and [Pb(3-pdip)(L2)] (2) [LH2 = 1,6-hexanedioic acid, LH2 = homophthalic acid, 3-pdip = 2-(3-pyridyl)imidazo[4,5-f]1,10-phenanthroline] have been obtained from hydrothermal reactions of Pb(II) nitrate with the phenanthroline derivative and the two dicarboxylic acids. Single-crystal X-ray diffraction anal...

Selective separation of lead ions (Pb(2+)) from aqueous solutions containing multiple divalent metal ions (Pb(2+), Cu(2+), Cd(2+), Zn(2+), Mn(2+), Co(2+), and Ni(2+)) was investigated using liquid-liquid extraction. N,N-Dioctyldiglycol amic acid (DODGAA) enabled quantitative extraction and efficient separation of Pb(2+) from the metal ion mixture under mildly acidic conditions. Compared with ...

[1] This paper presents the first results of Be and Pb specific activities in cloudwater and investigates their respective differences in cloudwater and rainwater. Our data and analysis show that temporal variation of the Be/Pb activity ratio in cloudwater are caused by multiple sources of air masses, with increased Be/Pb activity ratios corresponding to the advent of maritime or high-altitude ...

Pb(II) is a representative heavy metal in industrial wastewater, which may frequently cause serious hazard to living organisms. In this study, comparative studies between alginate nanoparticles (AN) and quercetin-decorated alginate nanoparticles (Q-AN) were investigated for Pb(II) ion adsorption. Characterization of AN and Q-AN were analysed by transmission electron microscopy (TEM), Fourier tr...

BACKGROUND The aim of this study was to compare the effectiveness of paracervical block (PB) and IV sedation (IVS) on women's pain perception during operative hysteroscopy. METHODS A total of 84 patients with uterine polyps were randomized to either PB or IV sedation or general anesthesia (GA) as control group. In PB group, the patients received oral diazepam 10 mg and 100 mg diclofenac Na su...

We report measurements of Pb diffusion in both synthetic (CePO4) and natural monazites run under dry, 1-atm conditions. Powdered mixtures of prereacted CePO4 and PbZrO3 were used as the source of Pb diffusant for “in-diffusion” experiments conducted in sealed Pt capsules for durations ranging from a few hours to several weeks. Following the diffusion anneals, Pb concentration profiles were meas...

The present study investigated the accumulation and depuration of two heavy metals Cd and Pb in the freshwater clam  (Corbicula fluminea) under laboratory conditions. Treated clams were exposed to single and combined treatments of Cd and Pb at the concentration of 5 mg L-1 and 10.5 mg L-1 for 10 days, respectively. The animals were then placed in metal free water for the following 5 days for de...

Immunoglobulin (Ig)M 1 IgD 1 B cells are generally assumed to represent antigen-inexperienced, naive B cells expressing variable (V) region genes without somatic mutations. We report here that human IgM 1 IgD 1 peripheral blood (PB) B cells expressing the CD27 cell surface antigen carry mutated V genes, in contrast to CD27-negative IgM 1 IgD 1 B cells. IgM 1 IgD 1 CD27 1 B cells resemble class-...

Anthropogenic emissions have dominated marine Pb sources during the past century. Here we present Pb concentrations and isotope compositions for ocean depth profiles collected in the eastern Tropical Atlantic Ocean (GEOTRACES section GA06), to trace the transfer of anthropogenic Pb into the ocean interior. Variations in Pb concentration and isotope composition were associated with changes in hy...

Jet quenching as observed via high pT hadron production is studied in the HIJING1.35 model. We test the model on recent WA98 data on 160 AGeV Pb+ Pb → π up to 4 GeV/c. The results depend sensitively on the model of the Cronin effect. At (RHIC) collider energies ( √ s > 200 AGeV), on the other hand, semi-hard hadron production becomes insensitive to the above model and is thus expected to be a c...