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.
How UV Light Kills Bacteria. To understand Ultraviolet Germicidal Irradiation (UV light bacteria killing effect), itâs imperative first to understand what ultraviolet light is. Ultraviolet light is the light between X-Rays and Visible Infrared on the light spectrum, with wavelengths between 100 nanometers and 400 nanometers.