With more education and experience, accountants can become certified. Some financial documents, such as those submitted to the Securities and Exchange Commission, must be signed by a Certified Public Accountant.
Hyperchromicity is the increase of absorbance (optical density) of a material. The most famous example is the hyperchromicity of DNA that occurs when the DNA duplex is denatured. The UV absorption is increased when the two single DNA strands are being separated, either by heat or by addition of denaturant or by increasing the pH level.
DNA sucks in UV light like a sponge because the most intense portion of DNAâs absorption spectrum (wavelengths of 250 to 260 nm) complements the peak energy emission of UV light (240 to 280 nm). Because of the UV component of sunlight, UV light is the most common source of DNA-damaging radiation.