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.
Nits are found firmly attached to the hair shaft about 1/4 inch from the scalp. They are oval and usually light colored or white, and take about a week to hatch into a baby louse called a nymph, then take about seven days to mature. Adult lice can live up to 30 days on a person's head, if the lice falls off a person, it dies within two days. The best defense, is a strong offense when dealing with these pests - the sooner the better. Search for head lice when hair is wet.