Kinetic mechanisms by which nickel alters the calcium (Ca) transport in intact rat liver.

In the present work, the multiple-indicator dilution (MID) technique was used to investigate the kinetic mechanisms by which nickel (Ni) affects the calcium (Ca) transport in intact rat liver. Ca and extra- and intracellular space indicators were injected in livers perfused with 1 mM Ni, and the outflow profiles were analyzed by a mathematical model. For comparative purposes, the effects of norepinephrine were measured.

Bidens pilosa L. exhibits high sensitivity to coumarin in comparison with three other weed species.

Nine natural plant compounds were screened for phytotoxicity to Bidens pilosa L. a troublesome weed in field and plantation crops. The sensitivity of three other weed species to coumarin, the most active identified compound, was also evaluated.