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Direct methanol fuel cell — Direct methanol fuel cells or DMFCs are a subcategory of proton exchange fuel cells in which methanol is used as the fuel. Their main advantage is the ease of transport of methanol, an energy dense yet reasonably stable liquid at all… … Wikipedia
Direct-ethanol fuel cell — Direct ethanol fuel cells or DEFCs are a subcategory of Proton exchange fuel cells where the fuel, ethanol, is fed directly to the fuel cell. Contents 1 Advantages 2 Reaction 3 Issues 4 … Wikipedia
Direct borohydride fuel cell — Direct borohydride fuel cells (DBFCs) are a subcategory of alkaline fuel cells which are directly fed by sodium borohydride or potassium borohydride as a fuel and either air/oxygen[1] or hydrogen peroxide[2] as the oxidant. DBFCs are relatively… … Wikipedia
Direct current — (red curve). The horizontal axis measures time; the vertical, current or voltage. Direct current (DC) is the unidirectional flow of electric charge. Direct current is produced by such sources as batteries, thermocouples, solar cells, and… … Wikipedia
Direct tension indicator — Direct Tension Indicators, or DTIs, are single use mechanical load cells used to illustrate when adequate tension has been achieved in structural fastener assemblies.[1] The Standard for DTIs in North America is the ASTM International series of… … Wikipedia
direct current — n. an electric current flowing in one direction: abbrev. DC: cf. ALTERNATING CURRENT * * * ▪ electronics abbreviation Dc, flow of electric charge that does not change direction. Direct current is produced by batteries, fuel cells,… … Universalium
Direct injection expanded foam molding — (also known as injection molded foam) is a foam manufacturing process that creates soft foam products direct from compound into a final product. This process eliminates the steps required for die cutting and compression molding, as it… … Wikipedia
Direct carbon fuel cell — A Direct Carbon Fuel Cell (DCFC) is a fuel cell that uses a carbon rich material as a fuel. The cell produces energy by combining carbon and oxygen, which releases carbon dioxide as a by product. The total reaction of the cell is C + O2 → CO2.… … Wikipedia
Direct and indirect band gaps — In semiconductor physics, the band gap of a semiconductor is always one of two types, a direct band gap or an indirect band gap. The band gap is called direct if the momentum of electrons and holes is the same in both the conduction band and the… … Wikipedia
Direct access storage device — In mainframe computers and some minicomputers, a direct access storage device, or DASD ( /ˈdæ … Wikipedia
