BROVANA Â® (arformoterol tartrate) Inhalation Solution is a long-acting beta 2-adrenergic agonist (LABA) indicated for the long-term, twice-daily (morning and evening) maintenance treatment of bronchoconstriction in patients with chronic obstructive pulmonary disease (COPD), including chronic bronchitis and/or emphysema.
The oil drop experiment was performed by Robert A. Millikan and Harvey Fletcher in 1909 to measure the elementary electric charge (the charge of the electron). The experiment entailed observing tiny electrically charged droplets of oil located between two parallel metal surfaces, forming the plates of a capacitor.
The oil drop experiment appears in a list of Science's 10 Most Beautiful Experiments , originally published in the New York Times. Engeness, T.E., The Millikan Oil Drop Experiment. 25 April 2005. Millikan R. A. (1913). On the elementary electrical charge and the Avogadro constant (PDF). Physical Review. Series II. 2: 109â143.