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.
The body louse (Pediculus humanus humanus, sometimes called Pediculus humanus corporis) is a louse that infests humans.The condition of being infested with head lice, body lice, or pubic lice is known as pediculosis. A nymph looks like an adult body louse, but is smaller. 2  Nymphs mature into adults about 9â12 days after hatching. 3  To live, it must feed on blood. 4  The adult body louse is about the size of a sesame seed (2.5â3.5 mm), has six legs, and is tan to greyish-white.