Microscale preconcentration by liquid-liquid extraction of cadmium in indium and nickel

Microscale preconcentration techniques using 1 to 10 milligrams of samples and microliter volumes of aqueous solutions and organic solvents are described for the determination of cadmium at the sub-ppm level in indium and nickel by graphite-furnace atomic absorption spectrometry. Several simple apparatus are devised to overcome operational difficulties resulting from the miniaturization and ensure the precision and accuracy of analytical results. Cadmium in the metals is heterogeneously distributed.     

Metathesis reactions of pyrazolotriazinones generate dynamic combinatorial libraries

[reaction: see text] Reversible metathesis reactions of pyrazolotriazinones and aliphatic aldehydes or ketones proceed in aqueous, phosphate-buffered media at pH 4 and 40-60 degrees C to generate thermodynamically controlled mixtures of heterocycles.     

Schizophyllans carrying oligosaccharide appendages as potential candidates for cell-targeted antisense carrier

Schizophyllans carrying beta-lactoside and alpha-mannoside appendages were prepared from native schizophyllan through NaIO4 oxidation followed by reductive amination using aminoethyl-beta-lactoside and alpha-mannoside, respectively. The resulting schizophyllans form stable macromolecular complexes with polynucleotides, such as poly(C) and poly(dA). Specific affinity between these macromolecular complexes and saccharide-binding proteins was demonstrated by surface plasmon resonance and agarose gel staining assays. beta-lactoside-appended schizophyllan enhanced an antisense activity in hepatocytes which express lactoside-binding proteins on their cell surfaces.     

Morava -theory of extraspecial -groups

We compute the Morava -theory of some extraspecial 2-groups and associated compact groups.

     

Weakened constraints from b-->sgamma on supersymmetry flavor mixing due to next-to-leading-order corrections

We examine the process B-->X(s)gamma in minimal supersymmetry (SUSY) with general squark flavor mix-ings. We include all relevant next-to-leading order (NLO) QCD corrections and dominant NLO SUSY effects from the gluino. We find that gluino-squark corrections to down-type quark masses induce large NLO corrections to the dominant Wilson coefficients whose size is often similar to those at LO, es-pecially at large tan(beta. For micro>0, destructive interference and suppression by the renormalization group running lead to a "focusing effect" of reducing the size of gluino corrections to the branching ratio, and also of reducing the LO sensitivity to flavor mixings among squarks. Constraints from B(B-->X(s)gamma) on the SUSY-breaking scale can become significantly weakened relative to the minimal flavor violation case, even, at large tan(beta, for small flavor mixings. The case of micro<0 also becomes allowed.     

Specific band observed in VCD predicts the anomeric configuration of carbohydrates

The vibrational circular dichroism (VCD) technique was applied to carbohydrates and produced a glycoside characteristic VCD band, which was named the "glycoside band." It confirmed that this vibration was related to anomeric configurations of carbohydrates in the case of the d-series by means of isotope substitution. This band is defined as a negative, sharp, and intense VCD band at around 1145 cm-1, exhibited by d-sugars with an axial alpha-glycosidic linkage in the 4C1 conformation. As applications of this band, the VCD studies of the maltose-cellobiose mixture and the monitoring of the amyloglucosidase reaction were examined.     

Effects of monoclonal anti-PcrV antibody on <Emphasis Type="Italic">Pseudomonas aeruginosa</Emphasis>-induced acute lung injury in a rat model

Background  

The effects of the murine monoclonal anti-PcrV antibody Mab166 on acute lung injury induced by Pseudomonas aeruginosa were analyzed in a rat model.