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.
Methods of DNA/RNA Purification from PAGE Gels. This technique accelerates the slow diffusion of DNA from a block of polyacrylamide by maximizing the surface area for contact between the gel and the elution buffer. The gel slice is crushed into a fine slurry, which is soaked in the elution buffer of choice.