Sentences with phrase «toxic at the lower concentrations»

The invitro cytotoxicity results shows that the developed contrasts are not toxic at the lower concentrations.

Another preservative, phenoxyethanol, was originally used as an insecticide and an insect repellant, and it can be toxic at low concentrations to invertebrates from shrimp to sea urchins.

Not exact matches

The iPhone did get a clean bill of health from Greenpeace in several areas: no cadmium (a carcinogen) or mercury (a toxin known to cause nerve and organ damage) was detected, and lead and chromium (toxic if ingested or inhaled) were detected in a small proportion of samples and at relatively low concentrations.

«Originally, BDO was toxic to E. coli at fairly low levels but we evolved the organism such that it now tolerates the concentration we need it to grow at,» Schilling says.

Chemotherapy usually requires the delivery of multiple toxic drugs at high concentrations, and we could deliver all of these drugs in one injection at much lower dosages.

Toxic chemicals in the condensate could harm plankton, fish larvae and invertebrate larvae at fairly low concentrations at the sea surface, he says.

At lower concentrations they can act as pheromone and endocrine disruptors, while at higher concentrations they can be acutely toxic to invertebrateAt lower concentrations they can act as pheromone and endocrine disruptors, while at higher concentrations they can be acutely toxic to invertebrateat higher concentrations they can be acutely toxic to invertebrates.

«Many of the products — typically those that were yellow, red, or black — contained high concentrations of hazardous elements that can be toxic to children over an extended period, even at low levels.

But pollution also covers hundreds of chemicals which are fine or even beneficial at low levels but which if released in large quantities or in problematic circumstances cause «harm» — like phosphorus (grows your veges but also leads to toxic cyanobacterial blooms which kill cattle), nitrogen (grows crops kills many native species of plants and promotes weed growth costing farmers), copper (used as an oxygen carrier by gastropods but in high concentrations kills the life in sediments which feed fish), hormones like oestrogen (essential for regulating bodies but in high concentrations confuse reproductive cycles especially with marine life) or maybe molasses from a sugar mill (good for rum but when dumped into east coast estuaries used to cause oxygen sag in estuaries leading to massive fish kills).

At low concentrations, it is toxic.