Three new biphenyls, berbekorin A (1), 2'-hydroxy-3,4,5-trimethoxybiphenyl (2), and 4,5-dihydroxy-3-methoxybiphenyl (3), together with 11 known biphenyls (4-14), were isolated from the n-hexane-soluble fraction of the MeOH extract of the trunk of Berberis koreana. The structures of 1-3 were determined by spectroscopic methods, including 1D and 2D NMR analysis. Compound 1 exhibited cytotoxic act...

Polychlorinated Biphenyls (PCBs) have been widely used to flame-retard products common in homes and theworkplace, and subsequently. Polychlorinated biphenyls (PCBs) typify a class of highly toxic, stable aromaticpollutants. PCBs are recently being scrutinized for potential environment damage in groundwater and in theatmosphere. The elimination of chemical pollutants from a contaminated environm...

The elution order of 209 polychlorinated biphenyls (PCBs) was determined using five types commercially available capillary columns (VF-Xms, Rtx-20, VF-35ms, VF-1301ms and VF-200ms). In addition, the interference among molecular ion peaks PCDDs non-dioxin like PCB congeners, which affect during dioxin analysis by GC/MS, clarified.