A paper in the October 2003 issue of the Journal, Opiate Recidivism in a Drug-Treatment Program: Comparison of Hair and Urine Data, by B.K. Charles et al. (1) concludes the following: 1. hair results of heroin use disagreed with the urine data in most cases; 2. hair was a poor matrix for routine use in recidivism monitoring; and 3. urine appeared to be a more sensitive indicator of changes in t...

The DPPH radical-scavenging abilities of the naturally occurring phenolic acid, 2,3,4-trihydroxybenzoic acid, and its methyl ester were evaluated. Both compounds in acetonitrile scavenged as many as four radicals compared to three or fewer radical consumption in acetone or ethanol. Only the ester showed relatively high ability in methanol. Oxidation with o-chloranil in acetonitrile resulted in ...

The improved synthesis and characterization of tetra-pyrazine-platinum(II) bis-(tetra-fluoro-borate) acetonitrile hemisolvate, [Pt(C(4)H(4)N(2))(4)](BF(4))(2)·0.5CH(3)CN, is reported. The unit cell contains a half equivalent of an acetonitrile solvent mol-ecule per tetra-pyrazine-platinum(II) ion. The coordination geometry of the Pt(II) ion is almost square-planar, with the Pt atom residing on ...