Black holes, quasars and active galaxies. Black holes are objects so dense, and with so much mass, that even light cannot escape their gravity. The existence of black holes has been theorised for more than 200 years. It is impossible to observe them directly, and astronomers had no way to test their theories until Hubble arrived.
Sequence IIIG Test Method. Sequence IIIG testing for automotive engine oils. The Sequence IIIG Test is a fired-engine, dynamometer lubricant test for evaluating automotive engine oils for certain high-temperature performance characteristics, including oil thickening, varnish deposition, oil consumption, and engine wear.
The Biuret Test works for any compound containing two or more of the following groups. Ninhydrin Test: The Ninhydrin Test is a test for amino acids and proteins with a free -NH2 group. When such an -NH2 group reacts with ninhydrin, a purple-blue complex is formed. | Chemistry Home | Dr. Sundin Home | Chemistry 3510 | sundin@uwplatt.edu |.