Polyarthralgia, which is joint pain that affects five or more joints, and polyarthritis, which is joint inflammation that affects five or more joints, are the most common joint problems associated with lupus.In fact, more than half of people with lupus already suffer from these problems when they are first diagnosed.bout 95 percent of people with lupus experience arthritis, which is joint inflammation, or arthralgia, which is joint pain.
Ethane, C2H6, is an alkane and is an example of a saturated hydrocarbon. Ethene, C2H4, is an alkene and is an example of unsaturated hydrocarbon. Ethyne, C2H2, is an alkyne and is also an example of unsaturated hydrocarbon. Aromatic compounds are unsaturated hydrocarbons and contain a benzene ring.lkanes are saturated hydrocarbons. Saturated means that the hydrocarbon has only single bonds and that the hydrocarbon contains the maximum number of hydrogen atoms for each carbon atom. Unsaturated hydrocarbons contain multiple bonding and contain less than the maximum number of hydrogens per carbon.
Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula C 2H 4 or H2C=CH2. It is a colorless flammable gas with a faint sweet and musky odour when pure. It is the simplest alkene (a hydrocarbon with carbon-carbon double bonds).