1,000 1 ng = 10 -9 1mcg = 10 -6 answer is 10 - 3 i.e. 1000 http://www.convertworld.com/en/mass/Microgram.html
ug is a misspelling of µg, which stands for microgramme.
Gordon Scott Porter has written: 'The polargraphic determination of microgramme quantities of some phenothiazine and benzodiazepine tranquillizers'
Check if the following link will help; if not, then click on the 'Recommend Question' button shown near after the textbox so that the question can float around 'til it's found by someone with technical information. You can also browse for old answers archived within the categories labelled (American English 'labeled') 'Medication and Drugs' and 'Units of Measure':What_is_a_microgram
a microgram is In the metric system, a microgram or microgramme is a unit of mass equal to one millionth (1×10−6) of a gram. The unit symbol is μg according to the International System of Units; the recommended symbol in the United States and United Kingdom when communicating medical information is mcg. In μg the prefix symbol for micro- is the Greek letter μ (Mu).
It depends on the mass and context, but it would be expressed in just one of those units with decimals when necessary. You don't mix unit names Examples: 3mg, 7g, 7.53g, 6.4kg, 8000kg. Note 6.4kg not 6kg 400g, for although numerically right the latter breaks one of the points of decimal measurements. if you're working with extremely tiny or extremely large objects then scientific notation may be appropriate: 3 X 10-11g (0.03 nanogrammes) 5.5 X 1020tonnes... which would equal of course, if rather absurdly, 5.5 X 1023kg.
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