Skin gets its color primarily from melanin, a pigment produced by melanocyte cells in the skin. The darker the skin, the more melanin it contains [source: MedicineNet ]. Freckles and beauty marks likewise indicate a higher concentration of the pigment in certain areas. Melanin also performs another vital function: It protects the skin against harmful UV rays.
APB Opinion No. 25, Accounting for Stock Issued to Employees, specifies that the measurement date for determining compensation cost in stock option, purchase, and award plans is the first date on which are known both (a) the number of shares that an individual employee is entitled to receive and (b) the option or purchase price, if any.
The first English official measurement standards were defined in 15th century. British system of units, known as imperial units, was established in 1824. Later in 1963 the standards were redefined in terms of metre stantard maintained in Paris. From 1995 the UK adopted metric units for general use.