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.
For the district of DiyarbakÄ±r Province in Turkey, see Lice, Turkey. For other uses, see Louse (disambiguation) . Louse (plural: lice) is the common name for the order Phthiraptera, which contains over 3,000 species of wingless insect; three of these species are agents of human disease, including typhus.Lice are obligate ectoparasites of every bird order, and every mammal order except for monotremes, bats, cetaceans and pangolins.ice generally cannot survive for long if removed from their host. A louse's color varies from pale beige to dark gray; however, if feeding on blood, it may become considerably darker. Female lice are usually more common than the males, and some species are even known to be parthenogenetic.