Nondestructive Methods for Recovery of Biological Material from Human Teeth for DNA Extraction

The extraction of DNA from human skeletal remains applied to forensic, and evolutionary studies do not exclude risks, which are to be evaluated when working with unique specimens that could be damaged or even destroyed. In the present study were evaluated several nondestructive methods for recovering DNA instead of the most currently used pulverization method. Three different procedures to access inside the dental pieces (occlusal perforation, cervical perforation, and cervical cut) have been compared with the aim of recovering as many cell remains as possible to carry out a DNA extraction. Given the DNA quantitation results, a method was proposed that consists of a cervical cut to facilitate the access to the pulp cavity and a subsequent filing of the root canals down to the apex of the dental root. This methodology allows the recovery of both mitochondrial and nuclear DNA, with the minimum deterioration for the dental pieces.     

Can Business Development Services practitioners learn from theories of innovation and services marketing?

Business Development Services (BDS) programmes have become big business for international donors and NGOs. Focusing on small enterprises in developing countries, the current BDS approach assumes that the development of commercial markets is the key to success. Yet many of these programmes continue to have a limited impact. A review of modern theories of innovation and services marketing management suggests that this may be because current BDS support practice reflects a rather limited understanding of how new markets actually develop. Drawing on the insights that these theories offer, the authors suggest that BDS practice should develop a more evolutionary approach, recognising that service innovations develop through active, on-going interaction between suppliers and customers. The article concludes with practical policy guidelines and a discussion about tools that could help BDS to adopt this more successful approach.