Throughout our life, we are exposed daily to ionizing radiation (IR) emitted by Earth, during routine medical diagnosis exams, or in the workplace for professionals such as nuclear workers but also cabin crew members of airline companies. How aware is the public of being exposed to low doses of IR? Accounting for about 2,4 mSv/year/person, these unperceived exposures to IR are considered harmless by radiation protection standards based on biological effects the current state of science allows to detect...
But how to be sure that what you can not see does not exist? Part of the answer is expected to come from European research project RISC-RAD (Radiosensitivity of Individuals and Susceptibility to Cancer induced by Ionizing Radiations), which just held its midterm meeting in Leiden, The Netherlands, from 4 to 6 May 2006. This four-year project funded by the European Commission (EC) started on 1st January 2004 and addresses the challenging issue of cancer risk assessment at low doses of IR.
“Under the dose of 100 mSv, epidemiological studies failed to demonstrate long term effects on organisms of exposure to ionizing radiations, because, if they exist, these effects are masked by the high cancer incidence of 25 % in the population”, explains Laure Sabatier, coordinator of RISC-RAD and head of the Radiobiology and Oncology Lab in the French Atomic Energy Commission. “This is why a biological approach is needed, starting with improving our understanding of the mechanisms by which ionizing radiation induce cancer”. Ionizing radiation act as a stress on cells, provoking immediate lesions on DNA double-helix, including strand breaks associated with base modifications. Since Hiroshima and Nagasaki bombings, long term effects of exposure to IR are known to be cancers.
Axel Meunier | alfa
Advanced analysis of brain structure shape may track progression to Alzheimer's disease
26.10.2016 | Massachusetts General Hospital
Indian roadside refuse fires produce toxic rainbow
26.10.2016 | Duke University
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences