摘要：A paramecium was employed as a biological reagent to evaluate the interaction of paraquat with biological materials (additives). This protista was added into a cocktail of paraquat and a biological material preparation. Life or death of paramecium in the cocktail indicated whether or not paraquat interacted with an additive. The following materials were found to protect paramecia from the toxicity of paraquat : soybean lecithin, soybean milk, egg lecithin, casein, cow's milk, skim milk, cheese, and trypan blue (not a biological material). These findings suggested that those materials had an ability to interact with paraquat.
