In early tests with the ligand 2-(2-Thiazolylazo)-p-cresol (TAC), we found that interference of the Fe(TAC) 1 complex may have competed with Fe(TAC) 2 for Fe. Also, i pmax was not reached in UV treated seawater after overnight equilibration ([TAC] = 40 Î¼ m, Î± Fe 3 + (TAC) 2 = 3.6 Ã 10 13).
BASE UNIT - kilogram (kg) - MASS. The standard for the kilogram is a cylinder of platinum-iridium alloy kept by the International Bureau of Weights and Measures in Paris. A duplicate at the National Bureau of Standards serves as the mass standard for the United States.
The basic metric unit of mass is the kilogram (kg). Kilograms are the only basic unit to contain a metric prefix. For quantifying small masses, grams (g) or milligrams (mg) are used instead.Micrograms (Âµg) are used in microbiology and other laboratory work for extremely small masses.he basic metric unit of mass is the kilogram (kg). Kilograms are the only basic unit to contain a metric prefix. For quantifying small masses, grams (g) or milligrams (mg) are used instead.