Arthritis means joint inflammation.. It causes pain and swelling in the body's joints, such as the knees or hips. There are many types of arthritis, but osteoarthritis is the most common. Also known as degenerative joint disease or age-related arthritis, osteoarthritis is more likely to develop as people get older.
Hydrogen cyanide (HCN), sometimes called prussic acid, is a chemical compound with the chemical formula HCN. It is a colorless, extremely poisonous and inflammable liquid that boils slightly above room temperature, at 25.6 Â°C (78.1 Â°F).
The cyanide ion is isoelectronic with carbon monoxide and with molecular nitrogen. Most cyanides are highly toxic. Organic cyanides are usually called nitriles; in these, the CN group is linked by a covalent bond to a carbon-containing group, such as methyl (CH 3) in methyl cyanide (acetonitrile).