galvanic corrosion, 610 gas analysis installation in atmospheric chemistry , 610 gas black (carbon black, channel black, furnace black) , 610 gas chromatography (GC), 611 gas constant, 611 gas laser, 611 gas sensing electrode, 611 gas-filled phototube, 612 gas-filled X-ray detector, 612 gas-liquid chromatography, 612 gas-phase acidity, 612 gas-phase basicity, 613 gas-phase-grown carbon fibres, 613 gas-solid chromatography, 613 gaseous diffusion separator in atmospheric chemistry , 614 gated photochromism, 614 gated photodetector, 614 gauche, 614 gauche conformation in polymers , 614 gauche effect, 615 gauss, 615