The Half Windsor Knot Tying Instructions. 1  1. Start with the wide end of the tie on the right and the small end on the left. 2  The tip of the small end should rest slightly above your belly-button (this will vary depending on your height and the length & thickness of your tie).
Ethidium bromide is an intercalating agent commonly used as a fluorescent tag (nucleic acid stain) in molecular biology laboratories for techniques such as agarose gel electrophoresis. It is commonly abbreviated as EtBr , which is also an abbreviation for bromoethane.
Ethidium Bromide - (Feb/16/2008 ) Stock solutions of Ethidium bromide are typically 10 mg/ml. This is diluted 10,000x for gels, buffers, or staining solutions to around 1 ug/ml. we use 1.5ul of ethidium bromide (10mg/ml) for 50ml of agarose gel.