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 is also mutagenic, It causes damage to DNA, exposure to it (skin contact or inhalation) should be avoided as it will damage the DNA in the cells it comes into contact with and hence have a negative effect on the cell. Source(s): i'm a geneticist. well_clever_i_am Â· 9 years ago. Thumbs up. 1.