Graphene nanoribbons for ‘reading’ DNA

Celebrities Who Battled Mesothelioma The cancer community is all to familiar…On MyBiologica.comHealth is the level of functional or metabolic efficiency of a living being. In humans, it is the general condition of a person’s mind and body, usually meaning to be free from illness, injury or pain.Alternative medicine is any of a wide range of health care practices, products and therapies, using methods of medical diagnosis and treatments which, at least up to the end of the twentieth century, were typically not included in the degree courses of established medical schools teaching medicine. Examples include homeopathy, Ayurveda, chiropractic and acupuncture.On MyBiologica.com all you are looking for about alternative medicine and health.Coming soon section with best cheapset health insurance offers for self …

via My Biologica:

Graphene nanoribbons for ‘reading’ DNA

One of the methods used for examining the molecules in a liquid consists in passing the fluid through a nano-sized hole so as to detect their passage. Researchers have found a way to improve this technique by using a material with unique properties: graphene.

via ScienceDaily: Top Science News:

Nov. 17, 2013 — If we wanted to count the number of people in a crowd, we could make on the fly estimates, very likely to be imprecise, or we could ask each person to pass through a turnstile. The latter resembles the model that EPFL researchers have used for creating a “DNA reader” that is able to detect the passage of individual DNA molecules through a tiny hole: a nanopore with integrated graphene transistor.The DNA molecules are diluted in a solution containing ions and are driven by an electric field through a membrane with a nanopore. When the molecule goes through the orifice, it provokes a slight perturbation to the field, detectable not only by the modulations in ionic current but also by concomitant modulation in the graphene transistor current. Based on this information, it is possible to determine whether a DNA molecule has passed through the membrane or not.This system is based on a method that has been known for over a dozen years. The original technique was not as reliable since it presented a number of shortcomings such as clogging pores and lack of precision, among others. “We thought that we would be able to solve these problems by creating a membrane as thin as possible while maintaining the orifice’s strength,” said Aleksandra Radenovic from the Laboratory of Nanoscale Biology at EPFL. Together with Floriano Traversi, postdoctoral student, and colleagues from the Laboratory of Nanoscale Electronics and Structures, she came across the material that turned out to be both the strongest and most resilient: graphene, which consists of a single layer of carbon molecules. The strips of graphene or nanoribbons used in the experiment were produced at EPFL, thanks to the work carried out at the Center for Micro Nanotechnology (CMI) and the Center for Electron Microscopy (CIME).”Through an amazing coincidence, continued the researcher, the graphene layer’s thickness measures 0.335 nm, which exactly fits the gap existing between two DNA bases, whereas in the materials used so far there was a 15 nm thickness.” As a result, while previously it was not possible to individually analyze the passage of DNA bases through these “long” tunnels — at a molecular scale -, the new method is likely to provide a much higher precision. Eventually, it could be used for DNA sequencing.However they are not there yet. …

For more info: Graphene nanoribbons for ‘reading’ DNA

ScienceDaily: Top Science News

Graphene nanoribbons for ‘reading’ DNA

L’articolo Graphene nanoribbons for ‘reading’ DNA sembra essere il primo su My Biologica.

For more info: Graphene nanoribbons for ‘reading’ DNA

My Biologica

Graphene nanoribbons for ‘reading’ DNA

The post Graphene nanoribbons for ‘reading’ DNA appeared first on FX FOREX.

via WordPress http://www.evvi.net/2350/world-news/graphene-nanoribbons-for-reading-dna.html



World News, ayurveda, based, battled, cancer, electronics, established, health, medical, twentieth