A 'B symptom' is a general symptom that, when combined with other symptoms, often preceeds the diagnosis of lymphoma. Primary B symptoms include the following, and in order to be considered B symptoms, they generally must persist for at least six months: Unexplained low-grade fevers. Drenching lymphoma night sweats.
Propane: Liquefied Petroleum Gas (LPG). Propane, or liquefied petroleum gas (LPG), is a clean-burning fossil fuel that can be used to power internal combustion engines. LPG-fueled vehicles can produce significantly lower amounts of some harmful emissions and the greenhouse gas carbon dioxide (CO 2). LPG is usually less expensive than gasoline, it can be used without degrading vehicle performance, and most LPG used in U.S. comes from domestic sources. The availability of LPG-fueled light-duty passenger vehicles is currently limited.
However, some LPG fuelled products require it to be in its liquid form, such as with autogas LPG liquid injection systems. LPG (Propane) Vaporisation - How LPG Boils. To boil, the liquid LPG draws heat from the steel walls of the gas bottle which, in turn, get heat from the ambient air. LPG liquid boils and turns back into gas vapour when you release some of the pressure in the gas bottle by turning on your gas appliance.