Final Exam

All of the following are DNA nitrogenous bases except 2. Tests at the National Institutes of Environmental and Health Sciences and the Federal Drug Administration are looking at what kind of exposure route for engineered nanoparticles 3. Depending on which medicine molecules are encapsulated, doctors would be able to change the (b) necessity of taking medicine (c) strength and type of medicine prescribed 4. Killer organisms, doomsday weapons, and science run amok are science fiction, not (d)...

Startups

Even though the nanotechnology market is still very much under construction, legitimate nano companies are coming up with great innovations and products. Many of these companies are evolving out of university research, headed by brilliant scientists who have never written a business plan. Some companies hire business managers to get things off the ground and make sure a reliable growth model is in place. Then, when everything is running smoothly, they hand off to operational managers and others...

Water Purification

Water is critical to human existence. The lack of a clean water supply not only affects health, but contaminated water from animal and human waste and chemical pollution and runoff is especially harmful. Access to clean water is a bigger problem than hunger in underdeveloped, war-torn, or natural disaster areas. In the United States, drinking water standards have been revised and water treatment methods are being changed to meet stricter contaminant standards. As the planet's population and...

Fluid Flow

The super small size of nanotubes allows them to pierce the skin painlessly always a plus , especially for people who have to check their blood several times a day, such as Type II diabetes patients. TheraFuse, Inc., is an emerging technology company that designs and develops infusion systems for delivering pharmaceutical and biopharmaceutical liquids. Since 2001, TheraFuse has created products that measure various fluid flow rates during therapeutic drug infusion e.g., very low insulin...

Gold Nanoshells

Figure 6-6 Gold-coated nanoshells are simple yet effective nanotechnology agents. Nanoparticles with a silica glass core and gold shell have been designed to absorb light wavelengths in the near-infrared i.e., in the total spectrum of light where light's penetration through tissue is greatest. Figure 6-7 shows the different wavelengths of the spectrum. The visible part of the spectrum is further divided according to color, with red at the long wavelength end and violet at the short wavelength...

Plenty of Room at the Bottom

On December 29, 1959, Professor Richard Feynman a 1965 Nobel Prize winner in physics presented a lecture entitled There's Plenty of Room at the Bottom during the annual meeting of the American Physical Society at the California Institute of Technology Caltech . He described a field that few researchers had thought much about, let alone investigated. Feynman presented the idea of manipulating and controlling things on an extremely small scale by building and shaping matter one atom at a time. He...