In this experiment, ammonium nitrate as mobile phase, by complexing Cr(III), under alkaline conditions, to achieve the separation of Cr(VI) and peak in front, LC-ICP-MS method was established for determination precipitation faucets. The had a good linearity range 1~10 μg/L. And suitable small volume faucets due amount extracting liquid low detection limit.

4. Synthetic and mechanistic aspects of main group chemistry as it relates to the design and development of novel ligand systems for use as complexing agents to radio metals of diagnostic and therapeutic importance in the development of site-specific radiopharmaceuticals. 5. Gold Nano Particles in Biomedical Optical Imaging 6. Development of new generation of Chemotherapeutic Agents for cancer ...

Atomically uniform nucleation products of ligated metal nanoclusters are observed irrespective of reduction conditions for metal-bidentate ligand systems. Monodentate ligands are not reported to wield similar control, indicating steric contributions of complexing ligands may be as important as their electronic structure for synthesizing small nanoclusters.

X-ray structural analyses have been carried out on the free acid of lasalocid A (X-537A) and on the sodium salt, both crystallized from methanol solution. In each case the structure is monomeric with one molecule of methanol complexing to the free acid and to the salt.

Under conditions favoring single-strand transformation, the two complementary strands of Bacillus subtilis DNA, separated by differential complexing with polyriboguanylic acid, have identical transforming activity. Moreover separated single strands, upon renaturation with unmarked (recipient) DNA, form heteroduplex molecules with similar double-strand transformin activity. These findings bear u...

The stability constants of Cu'(l1) glycine complexes in 0.7 M NaC104 and 0.7M NaN03 media were evaluated using Cu ( 1 1 ) ion selective electrode. The stability constant data are consistent with earlier reports of other metal ion complexes of glycine. The distribution level of Cu ( 1 1 ) glycine complexes in presence of other complexing ligands of marine environment has also been numerically ev...

A polyethylenimine (PEI) self-assembled monolayer (SAM) is prepared, capable of complexing silver and copper cations and of anchoring silver nanoparticles, exerting antibacterial activity against Escherichia coli and Staphylococcus aureus. Functionalized glassy surfaces have been fully characterized through spectroscopic techniques (UV-Vis spectroscopy, spectroscopic ellipsometry), atomic force...

Reversible switching between intra- to intermolecular electron transfer paths has been accomplished by adding and extracting potassium ions to the supramolecular porphyrin-fullerene conjugates formed by complexing porphyrin functionalized with a benzo-18-crown-6 entity and fullerene functionalized with an alkylammonium cation entity.

In human tissues, adenosine deaminase (ADA) (adenosine aminohydrolase; EC 3.5.4.4) activity can be separated by gel electrophoresis into several isozymes. A structural gene (ADA) on chromosome 20 codes for the "erythrocyte" isozyme, ADA-1, which is also expressed in some nonerythroid tissues. Nonerythroid cells also differentially express five ADA "tissue isozymes" of a greater molecular weight...

Hydroxyurea (Hy) in aqueous solutions has several tautomeric forms due to the formation of a >N-OH bond. The azometinic group >C=Nis present in all these tautomeric forms. The structural forms influence the hydrophil-lipophil character of Hy and it determines the complexing of the Fe(II) ions, thus explaining the appearance of anemia, due to the treatment with hydroxyurea. The paper presents a ...