The skin barrier opening
should be no more than 1/8 inch larger than the stoma size.
However, the initial albumin leakage into the brain tissue (seen within hours in ~40% of exposed animals in our previous studies) may start a secondary blood-brain barrier opening
, leading to a vicious circle--because we demonstrate albumin leakage even 8 weeks after the exposure.
They're also installed in fire barrier openings
that are designed to protect your building and its occupants from specific hazards, as well as compartmentalize your building into specific fire areas, says Chris Jelenewicz, engineering program manager with the Society of Fire Protection Engineers.