The dose makes the poison
"Drink at least 8 glasses of water a day" is commonly given advice. But is there any scientific basis to it?
The article looks at the available evidence and also at what happens when you drink too much water.
"The prototypes have already shown early sparks of intelligence, processing images very efficiently and gaining new skills in a way that resembles biological learning. IBM has created tools to let software engineers program these brain-inspired chips; the other prototype, at HRL Laboratories in Malibu, California, will soon be installed inside a tiny robotic aircraft, from which it will learn to recognize its surroundings."
The nanobot (also called a DNA nanocage) can encapsulate and release active biomolecules. In time, the developers say, it will be used to transport medications around the body with purpose of creating a targeted effect on unwanted cells.
The nanobot is made by self-assembly. The researchers designed eight DNA molecules using materials from the body. When these molecules mix together, they spontaneously cluster in a usable form, the nanocage.
The nanocage has four functional elements that transform in response to temperature changes in the surrounding environment. The reactions either close or open the nanocage. By using the temperature changes in the surroundings, the research team trapped an active enzyme called horseradish peroxidase (HRP) in the nanocage. HRP was used as a model because it’s activity is easily traceable.
The structure of the nanocage allows it to function; the nanocage’s outer lattice has apertures with a smaller diameter than the central spherical cavity. This makes it possible to encapsulate enzymes or other molecules that are larger than the apertures in the lattice, but smaller than the central cavity.
This research was published in the journal ACS Nano .
Press Release: http://goo.gl/2JjfSG
Image: The figure shows the nanocage where eight unique DNA molecules are mixed together. The nanocage has four functional components that transform in response to changes in surrounding temperature. These transformations are either close (A) or open (B). C shows the active enzyme HRP in the nanocage. Credit: Sissel Juul
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