Screening

{
  "id": "MLC-T-ENV-024899",
  "term": "Screening",
  "field": "Environment",
  "definition": "1. An activity using less expensive tests typically of shorter duration to provide preliminary information about chemical toxicity potential. Results from screening assays are typically used to set priorities for those chemicals (or groups of chemicals) that need further evaluation. These tests may consist of in vivo or in vitro assays. Screening can also be done by the use of QSAR modeling.\n\n2. Reviewing files to apply access restrictions. See also ACCESS.\n\n3. Examining files to identify and remove documents of short-term value, especially those eligible for immediate destruction. Also called weeding or purging.\n\n4. Use of screens to remove coarse floating and suspended solids from sewage.\n\n5. Separating material according to size by passing undersize material through one or more mesh surfaces (screens) in series, and retaining oversize material on the mesh surfaces (screens). Grizzly feeders associated with truck dumping and static (non-moving) grizzlies used anywhere in the nonmetallic mineral processing plant are not considered to be screening operations.",
  "synonyms": [
    "WEEDING"
  ],
  "subject": "Chemicals, toxics and pesticides",
  "see_also": [
    "Purging"
  ],
  "references": [
    "Toxicity Testing and Risk Assessment Glossary",
    "Records Glossary",
    "Terms of Environment",
    "Adapted from 40 CFR 60.671 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/screening/"
}