REsearchers at columbia university medical centre newyork have developed a DNA-based computer that could lead to faster and more accurate diagnosis of west nile virus and bird flu.
It is the first “medium -scale integrated molecular circuit” it is the most powerful comuting device of its type.
Joanne Macdonald a virologist at columbia’s dapertment of medicine lead the team that developed MAYA-II (molecular arrays of YES and AND logic gates) a computer whose circuits consists of DNA instead of silicon . These computers can be used in fluids such as a a sample of blood in the body and make decisions at the level of single level
In 2003 Israeli scientists have devised a computer that can perform 330 trillion operations per second, more than 100,000 times the speed of the fastest PC.
Researchers from the Weizmann Institute of Science in Rehovot, Israel, unveiled a programmable molecular computing machine composed of enzymes and DNA molecules instead of silicon microchips, the single DNA molecule that provides the computer with the input data also provides all the necessary fuel.
Think of DNA as software, and enzymes as hardware. Put them together in a test tube. The way in which these molecules undergo chemical reactions with each other allows simple operations to be performed as a byproduct of the reactions. The scientists tell the devices what to do by controlling the composition of the DNA software molecules. It’s a completely different approach to pushing electrons around a dry circuit in a conventional computer.
To the naked eye, the DNA computer looks like clear water solution in a test tube. There is no mechanical device. A trillion bio-molecular devices could fit into a single drop of water. Instead of showing up on a computer screen, results are analyzed using a technique that allows scientists to see the length of the DNA output molecule.
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