That leaves them contaminated with both the oil and the organic compounds later used to clean them, making it especially difficult for scientists who want to study what organic material they might contain.
"We worried about what would happen to the dust, which consists of pulverized building materials, and might contain asbestos and other unknown toxic substances," she said.
For input materials that might contain significant amounts of soil, such as sugar beets or grass, pre-treatment is advisable to avoid damage of machinery and sedimentation in the digester.
"You're in the middle of a joke," he said, "and they're like, 'Hey, you need another drink.' " Club appearances are important for trying out new material, though, and "Long Story Short" might contain material created during recent club dates.
Gliatech said the supplier recalled the material because it might contain particles from an aluminized-paper lid liner.
I was fearful that it might contain material which would be damaging or would put lives at risk.
After "When the Mountains Tremble" was shown publicly for the first time in Guatemala in 2003, Ms. Yates was approached by a lawyer there who wondered if her outtakes might contain material incriminating General Ríos Montt, now 85, and other military leaders.
For the past few years, trigger warnings – a written or verbal heads up that the content of an assignment, article, movie, etc might contain material potentially upsetting ("triggering") for trauma survivors – have been at the center of conversation around young people, most of it quite negative.
If they exist they might contain material left over from the earliest period of planet formation, and help determine the conditions under which the terrestrial planets, particularly Mercury, formed.
Just this week, a container ship from Liberia was stopped because of suspicions that it might contain radioactive material.
