The classical example of thermionic emission is the emission of electrons from a hot cathode into a vacuum (also known as thermal electron emission or the Edison effect) in a vacuum tube. The hot cathode can be a metal filament, a coated metal filament, or a separate structure of metal or carbides or borides of transition metals.
Low confidence regions are areas for which there s a small amount of DNA evidence found in your sample. All ethnicities with predicted percentages of less than 4.5% appear as low confidence regions. Inferior complex is low complex .
The amount of DNA associated with a fingerprint will vary from person to person and can vary within the same person. Low Copy Number DNA Profiling. STR DNA, which is used for human identification, is extracted from nucleated cells.The ability to obtain reliable DNA profiles from fingerprints depends on the number of nucleated cells collected from the fingerprints.The more cells there are in a stain or on a surface, the more DNA there will be. If there are very few cells available, it is referred to as low copy number DNA profiling..nstead of swabbing the fingerprint off the surface of the paper, DDC scientists cut the fingerprint section from the paper, which was used for DNA extraction. DDC has found that it is easier to obtain DNA from a cut section of paper rather than a swabbed section of paper.