Carbon dioxide (CO 2) is usually pumped as a liquid, usually below 5Â°C (41Â°F) and a pressure of about 50 bar. The solvent is pumped as a liquid as it is then almost incompressible; if it was pumped as a supercritical fluid, much of the pump stroke would be used up in compressing the fluid, rather than pumping it.
The word lice is plural for louse. Head lice are spread by personal contact or the sharing of combs, brushes, caps, and other clothing. Head lice are a common problem with preschool and schoolchildren. Head lice cause a tickling feeling of something moving in the hair, itching, and sores on the head.
Pubic lice (Sing: pubic louse), also known as crab louse, crabs, or Fullers; Latin name Pthirus pubis are tiny parasitic blood-sucking wingless insects that infest the human genitals, causing itching and red spots. The only other animal known to be affected by this insect is the gorilla.