A process for initiating a reaction between methanol and a peroxide to produce a gas, which comprises contacting methanol and peroxide in the liquid phase and at a pressure equal to, below or above atmospheric pressure in the presence of a catalyst comprising at least one group 7, 8, 9, 10 or 11 transition metal. A plasma jet assembly may include: a tube through which a gas flows; a power source providing a high frequency power exciting the gas in plasma state; a power electrode applying the high frequency power to the gas; and a plasma control unit removing arc discharge of a plasma gas generated in the tube by the high frequency power applied to the power electrode. A support member can be slidably engaged with the door assembly. One form of encoding employs modification of the color content of the image at higher spatial frequencies, where human vision is not acute.