Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


German Scientists Perfect DNA From 'Omitted Hair'

DNA-Analysis Of Hair Simplified - Scientists Develop Process For Aggrieved Material

By Marietta Gross - Scoop Media Auckland

German legal scientists have discovered a DNA technique that will enable a reliable genetic fingerprint from "omitted hair" or hair that has fallen out of been removed from a body. Previously, police and forensic scientists were often unable to get a reliable match from omitted hair samples.

Medico-legal experts from the Johannes-Gutenberg-University in Mainz have developed a new method for taking genetic fingerprints, which considerably simplifies the DNA-designation for single hairs and heavily aggrieved material. To date, it has been almost impossible to base an analysis on omitted hair, because of the absence of somatic cells within roots of omitted hair.

DNA contains all the genetic information of a human being and consists of four basic modules, the bases Adenine, Guanine, Thymine and Cytosine. It is found in the cell nucleus in the form of 46 chromosomes. Only five per cent of DNA contains coding regions, which means it is responsible for the actual forming and appearance of a person. The other 95 per cent are non-coding segments, which can differ in size and which do not carry information that is important for appearance. In this non-coding region there are sections, which vary between different persons and give a relatively unique criterion for recognition.

DNA-material can be easily extracted from hair that is still growing. But omitted hair normally does not contain any more somatic cells. Old or aggrieved DNA is only existent in fragments. The scientists from Mainz have simplified the aggrandisement of these segments by means of polymerase chain reaction (PCR). The experts tried to examine as many criteria of the heavily aggrieved DNA as possible in one reaction. But only five to seven criteria can be placed in such a multiplex. The new method unifies two multiplexes for the PCR, which are later separated.

© Scoop Media

Business Headlines | Sci-Tech Headlines


ScoopPro: Helping PR Professionals Get More Out Of Scoop has been a fixture of New Zealand’s news and Public Relations infrastructure for over 18 years. However, without the financial assistance of those using Scoop in a professional context in key sectors such as Public Relations and media, Scoop will not be able to continue this service... More>>

Insurance: 2017 Worst Year On Record For Weather-Related Losses

The Insurance Council of New Zealand (ICNZ) announced today that 2017 has been the most expensive year on record for weather-related losses, with a total insured-losses value of more than $242 million. More>>


Crown Accounts: Govt Books In Line With Forecasts

The Government’s financial statements for the four months to 31 October indicate the books are tracking along with Treasury’s Budget forecasts, Finance Minister Grant Robertson says. More>>


Expert Reaction: Ross Sea Region Marine Protected Area In Force

Sweeping new protections for Antarctica's Ross Sea will come into effect on Friday 1 December. After five years of debate, the marine protected area (MPA) was agreed in 2016 after a joint proposal by New Zealand and the United States... More>>