| Gas heaters usually hiss when they operate and they usually require a venting system to avoid the buildup of dangerous byproducts. |
| In a bag of platelets or plasma, the psoralens break down after a day, and an absorbent resin wafer in the bag removes the byproducts. |
| Organic livestock producers must not feed mammalian or poultry slaughter byproducts to mammals or poultry. |
| Greenpeace found that perc breaks down into the toxic byproducts phosgene, vinyl chloride, carbon tetrachloride and trichloroacetic acid. |
| She says the government needs to ban byproducts from cattle and similar animals from all livestock feed. |
| Microwave irradiation can also allow the use of less or no solvent and can produce fewer byproducts, giving a purer product. |
