Malachite green result. Numerous niche applications exploit the intense color of MG. It is used as a biological stain for microscopic analysis of cell biology and tissue samples. In the Gimenez staining method, basic fuchsin stains bacteria red or magenta, and malachite green is used as a blue-green counterstain. Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used. Malachite green can also be used as a saturable absorber in dye lasers, or as a pH indicator between pH 0.2–1.8. However, this use is relatively rare. Leuco-malachite green
Italian submarine Malachite of operations, she was attacked by an aircraft but the attack was beaten back with her anti-aircraft weapons. During the night January 27 1941 she patrolled in the Strait of Messina. From 9 to 18 February 1941 "Malachite" patrolled off Bardia. On February 14 she attempted an attack on an unidentified warship, but fails to launch torpedoes due to the high speed of the target. From 15 to 22 March 1941 she was deployed in the Kythira Strait. On the night of March 19, "Malachite" sighted a cruiser escorted by several destroyers. At 01:19 she launched two torpedoes but they