A solid phase extraction and gas chromatography with negative chemical ionization mass spectrometry in scan mode (GC-NCI-MS) method was developed to identify and quantify for the first time low levels of organochlorine pesticides (OCs) in plasma samples of less than 100 ?l from wild birds.

For the present study, an attempt has been made to study the effect of cypermethrin and fenvalerate on oxygen consumption of the freshwater hill stream fish, Garra mullya (Sykes). The fishes were exposed to 24 h lethal concentration (0.18 ppm) of cypermethrin, whereas 24 h lethal (0.26ppm) and two sub lethal concentrations (0.086 and 0.026 ppm) of fenvalerate for different time periods.

Experiments have been carried out on the impact of commonly used pesticides on the population of earthworms and enchytraeids in rice-wheat cropping system.

Products derived from medicinal plants have been used for therapeutic purposes for centuries. Herbal products are generally considered safe and have been proven effective against certain ailments. They are also extensively used, particularly in many Asian, African and other developing countries (Patwardhan et al., 2005). There is an urgent need to establish the identity, purity and quality of herbal products in order to have full efficacy and safety.

The article discussses the health effects of polychlorinated biphenyls (PCB). Between 1960 and 1977 Monsanto's Newport plant produced several types of PCB, that are persistent and ubiquitous and toxic.