Tiny tech, unknown risks - News & Observer, USA
Researchers are faced with concerns about the effects, if any, of nanoparticles once they enter the body.
"Relatively few studies have looked at longer-term impacts, and particularly chronic impacts," said Andrew Maynard, chief science adviser for the Project on Emerging Nanotechnologies.
Unless more money is provided for research, scientists have made it clear that they won't be able to catch up with the stream of new products hitting store shelves.

Study shows quantum dots can penetrate skin through minor abrasions - NanoWerk, USA
Quantum dot nanoparticles can penetrate the skin if there is an abrasion. This provides insight into potential workplace concerns for healthcare workers or individuals involved in the manufacturing of quantum dots or doing research on potential biomedical applications of the tiny nanoparticles.

EPA Nano Authority under TSCA, Part 5: Can EPA Regulate “Existing” Nanomaterials? - Environmental Defense, USA
In this series of posts, I’ve described some of the serious limits to EPA’s ability to apply its authorities under TSCA to address the potential for nanomaterials to harm human health or the environment. These limits pertain both to EPA’s ability to obtain information sufficient to effectively assess potential risks, and its ability to act on such information when it indicates there are significant risks.
While in some cases EPA could use its existing authorities to do more than it has done, a number of the problems I’ve identified will clearly require changes to TSCA. And, of course, many of these problems extend well beyond nanomaterials to affect all chemicals that fall under the purview of TSCA.