Any amount of ethylene glycol is dangerous.
But here to the devil is in the detail: A small
amount of ethylene carbonate is required in current systems to pacify the anode.
The direct conversion process produces minimal
amounts of ethylene by - product, making the technology more cost - effective than previous approaches.
Depending on manufacturing processes, PEGs may be contaminated with measurable
amounts of ethylene oxide and 1,4 - dioxane, which are both carcinogens.
Seasonal snow globes also contain small
amounts of ethylene glycol in the liquid.
Not exact matches
It also contains small
amounts of an acidified zirconium salt
of a weak acid (acetic acid) and
ethylene diamine tetra acetic acid (EDTA) to stabilize the emulsion.
«They reduced the
amount of acetylene in
ethylene down to less than 2 parts per million (ppm), which is lower than the 5 ppm that polyethylene manufacturing requires,» said NIST materials scientist Wei Zhou.
The conventional industrial solution is to convert this undesirable acetylene into
ethylene as well, but this step requires the use
of palladium, an expensive and rare metal, as a catalyst and consumes a significant
amount of energy.
The prototype device designed to carry out the reaction achieved a 30 per cent faradaic efficiency
of ethylene based on the
amount of electrons generated from solar energy.
When hot weather hits a wheat field an increase in
ethylene levels can lessen the
amount of grains produced on ears or spikes by limiting the export
of carbohydrates to pollen development.
Even small
amounts of antifreeze (
ethylene glycol) can kill dogs within hours.
«the largest impact on global warming was caused by the processing
of LDPE (low - density polyethylene, a thermoplastic made from the monomer
ethylene) used in tampon applicators as well as in the plastic back - strip
of a sanitary napkin requiring high
amounts of fossil fuel generated energy.