Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

DNA can be damaged by very low-energy radiation

14.03.2014

How safe are 'eye-safe' lasers?

"Very low-energy radiation also damages DNA: how safe are "eye-safe" lasers?"

Damage to DNA by high energy radiation constitutes the most lethal damage occurring at the cellular level.

Surprisingly, very low-energy interactions - with OH radicals, for instance - can also induce DNA damage, including double strand breaks.

It is known that single strand breaks in the DNA backbone are amenable to repair but most double strand breaks are irreparable.

The propensity with which slow OH radicals damage DNA depends on their rotational energy: rotationally "hot" OH is more proficient in causing double breaks.

These novel findings are from experiments conducted on DNA in a physiological environment.

Intense femtosecond laser pulses are propagated through water (in which DNA plasmids are suspended), creating plasma channels within water, resulting in generation, in situ, of electrons and OH radicals.

It is shown that use of long laser wavelength light (1350 nm and 2200 nm) ensures only OH-induced damage to DNA is accessed.

It is noteworthy that industry presently characterizes as "eye-safe" lasers that emit at wavelengths longer than 1300 nm.

But it is such wavelengths that are proficient at inducing damage to DNA: how safe is "eye-safe" when DNA in the eye can be readily damaged?

Deepak Mathur | EurekAlert!
Further information:
http://www.tifr.res.in

Further reports about: DNA Tata breaks damage electrons interactions lasers lethal propensity radicals wavelengths

More articles from Health and Medicine:

nachricht Unlocking the secrets of pulmonary hypertension
31.10.2014 | University of Alberta Faculty of Medicine & Dentistry

nachricht High-intensity sound waves may aid regenerative medicine
30.10.2014 | Acoustical Society of America

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Anzeige

Anzeige

Event News

Registration Open Now: 18th International ESAFORM Conference on Material Forming

28.10.2014 | Event News

Comparing Apples and Oranges? A Colloquium on International Comparative Urban Research

22.10.2014 | Event News

Battery Conference April 2015 in Aachen

16.10.2014 | Event News

 
Latest News

Sculpting solar systems: Magnetic fields seen for first time

31.10.2014 | Physics and Astronomy

Here's Looking At You: Spooky Shadow Play Gives Jupiter a Giant Eye

31.10.2014 | Physics and Astronomy

New research reveals fish are smarter than we thought

31.10.2014 | Studies and Analyses

VideoLinks
B2B-VideoLinks
More VideoLinks >>>