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18-10-2010, 10:58 AM


.doc   NANOBOTS.doc (Size: 30 KB / Downloads: 177)


Robert A. Freitas Jr. visualizes a future "vasculoid" (vascular-like machine) that would replace human blood with some 500 trillion nanorobots distributed throughout the body’s vasculature as a coating. It could eradicate heart disease, stroke, and other vascular problems; remove parasites, bacteria, viruses, and metastasizing cancer cells to limit the spread of bloodborne disease; move lymphocytes faster to improve immune response; reduce susceptibility to chemical, biochemical, and parasitic poisons; improve physical endurance and stamina; and partially protect from various accidents and other physical harm. With the availablitity of mature molecular nanotechnology we could replace blood with a single complex robot. This robot would duplicate all essential thermal and biochemical transport functions of the blood, including circulation of respiratory gases, glucose, hormones, cytokines, waste products, and all necessary cellular components. The device would conform to ! the shape of existing blood vessels. Ideally, it would replace natural blood so thoroughly that the rest of the body would remain, essentially unaffected. It is, in effect, a mechanically engineered redesign of the human circulatory system that attempts to integrate itself as an intimate personal appliance with minimal adaptation on the part of the host human body. Molecular nanotechnology has been defined as the three-dimensional positional control of molecular structure to create materials and devices to molecular precision. The human body is comprised of molecules, hence the availability of molecular nanotechnology will permit dramatic progress in human medical services. Nanomedicine will employ molecular machine systems to address medical problems, and will use molecular knowledge to maintain and improve human health at the molecular scale. Nanobots will have extraordinary and far-reaching implications for the medical profession, for the definition of disease, for the diag! n osis and treatment of medical conditions including aging, and ultimately for the improvement and extension of natural human biological structure and function. "Nanomedicine is the preservation and improvement of human health using molecular tools and molecular knowledge of the human body."
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18-10-2010, 01:16 PM

.docx   anamika.docx (Size: 1,020.45 KB / Downloads: 162)
.docx   anamika.docx (Size: 1,020.45 KB / Downloads: 162)

What are nanobots?
a nanobot is defined as a nanotechnological robot nanomachine, also called a nanite, which is a mechanical or electromechanical device whose dimensions are measured in nanometers (millionths of a millimeter, or units of 10-9 meter
Can you picture something that small? Can you think of how we might use such a device in science or medicine?
Nobody is quite sure who came up with the name ‘nanobot’ but most people give credit to Eric Drexler. A few years ago wrote a book called Engines of Creation. In his book, nanobots were imagined to be ‘self-replicating’ meaning that they could make more of themselves. They would be made of tiny parts that ‘self-assembled’. Imagine you had a pile of Legos that made themselves into a car without you having to put the pieces together. Sound farfetched? (See)
Nanobots would get their energy by eating molecules from their environment and also be able to not only do things but also make more of themselves. Sort of like bacteria, they can replicate and get their energy by eating molecules or by basking in the sun. Did you know that there are some bacteria that are photosynthetic?
Nanobots are mostly imagined to be little machines, tiny robots that scurry around and do things. Like what? Like cleaning out blocked arteries or swimming through the ocean eating polluting chemicals. But there are some serious problems in getting them to work. Life is different at the nanoscale. Not only do things not move very easily, but there is also a lot shaking going on. The notion of nanobots was at first a pretty scary thing. What would stop them from taking over the Earth by just making lots and lots of themselves. The closest things that are truly on the nanoscale are little ‘machines’ that are made out of stuff like DNA and move (link to DNA machines).

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