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Return on investment (ROI) or return on costs (ROC) is the ratio between net income (over a period) and investment (costs resulting from an investment of some resources at a point in time). A high ROI means the investment's gains compare favourably to its cost.
The patch pipette is designed for whole cell recording so its opening diameter is larger than experiments done to examine single ion-channels. For the most part standard patch clamp protocols may be used although there are some small situation dependent modifications to the pipette and the internal solution.
A strong acid will react with a weak base to form an acidic (pH < 7) solution. A weak acid will react with a strong base to form a basic (pH > 7) solution. These indicators are essential tools in chemistry and biology, aiding in the determination of a solution's acidity or alkalinity through the observation of colour transitions. [ 10 ]
ASTM standard E969 defines the standard tolerance for volumetric transfer pipettes. The tolerance depends on the size: a 0.5-mL pipette has a tolerance of ±0.006 mL, while a 50-mL pipette has a tolerance of ±0.05 mL. (These are for Class A pipettes; Class B pipettes are given a tolerance of twice that for the corresponding Class A.)
A telescope in the Very Large Telescope system producing four orange laser guide stars. A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.
Set in the fictional town of Charterville, three "typical average kids" — Andrew "Drew" McCormick (Wesley Barker) and his younger sister Josephine "Jo" McCormick (Shannon Chandler, later Brittany Konarzewski), and their best friend Roland Williams (Herbie Baez) — enter the supposedly haunted Hillhurst Mansion after accepting a dare from rich snobs Van and Trip.
A tax return usually includes the following components. Income consists of the sources of a citizen's revenue, excluding items which are exempt from tax by law.Wages, salaries, income from retirement plans, dividends, interest and capital gains or losses should be considered as a source of revenue.
Australian tax returns for the tax year beginning 1 July and ending 30 June of the following year are generally due on 31 October after the end of the tax year. Australian individual taxpayers can file their return online with the ATO's myTax software, by ordering a printed copy of the tax return form, or with the assistance of a tax agent.