Pronounced u-art, and short for universal asynchronous receiver-transmitter, the UART is a computer component that handles asynchronous serial communication. Every computer contains a UART to manage the serial ports, and some internal modems have their own UART.
1 Color. 2  Color of a rock depends on the minerals present and on their grain size. 3  Generally, rocks that contain lots of feldspar and quartz are light colored, and rocks that contain lots of pyroxenes, olivines, and amphiboles (ferromagnesium minerals) are dark colored.
Iron(III) oxide-hydroxide occurs naturally as four minerals, the polymorphs denoted by the Greek letters Î±, Î², Î³ and Î´. Goethite, Î±-FeO(OH), has been used as a pigment since prehistoric times. AkaganÃ©ite is the Î² polymorph, formed by weathering and noted for its presence in some meteorhe lunar surface.