CNG is made by compressing natural gas (which is mainly composed of methane, CH4), to less than 1 percent of the volume it occupies at standard atmospheric pressure. It is stored and distributed in hard containers at a pressure of 20â25 MPa (2,900â3,600 psi), usually in cylindrical or spherical shapes.
Definition of chromophore - an atom or group whose presence is responsible for the colour of a compound. Definition of chromophore - an atom or group whose presence is responsible for the colour of a compound.
1 The term âelectrophoresisâ was originally meant to refer to the migration of charged. particles in an electrical field. The alternative term âionophoresisâ had been reserved for. the migration of lower molecular weight substances in stabilized media such as gels and. powders [1].