Getting a Grip

Gecko adhesion also works in a vacuum, which eliminates the possibility that suction is involved in the process. 

Figuring out how geckos stick is not just an issue of pure scientific interest but could lead to 

For a given volume a sphere has a below (Fig. 16.6). The effect of this uneven pull on the surface molecules tends smaller surface area than any other to draw them into the body of the liquid and causes a droplet of liquid to shape. assume the shape that has the minimum surface area—a sphere. 

To increase a liquid s surface area, molecules must move from the interior of the liquid to the surface. This requires energy, since some intermolec-ular forces must be overcome. The resistance of a liquid to an increase in its 

A molecule in the interior of a liquid is attracted to the molecules surrounding it, whereas a molecule at the surface of a liquid is attracted only by molecules below it and on each side of it, 

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We say something is as slippery as an ice rink if it is has a tiny coefficient of friction, and we cannot get a grip underfoot. This is odd because the coefficient of friction /r for ice is quite high - try dragging a fingernail along the surface of some ice fresh from the ice box. It requires quite a lot of effort (and hence work) for a body to move over the surface of ice. 

Gibson W (1998) Getting a grip on the supply chain. Chemical Engineering November 35-39... 

Ellenberger, T. Getting a grip on DNA recognition structures of the basic region leudne zipper, and the basic region helix-loop-helix DNA-binding domains (1994) Curr. Op. Struct. Biol. 

Getting a Grip on tonic Compounds With Pohfatomic tons... 

Travis J (1993) Frontiers in biotechnology - biotech gets a grip on cell adhesion. Science 260 906-908... 

Step 1 Kenneth knows that he needs to deal with Dr. Decker in order to get a grip on the situation. 

J. Jager and J.D. Pata. 1999. Getting a grip Polymerases and their substrate complexes Curr. Opin. Struct. Biol. 9 21-28. (PubMed)... 

But let s get a grip on what we re really talking about here. We ve previously covered a lot of scary territory with the chemicals part of this book. There is an inherent risk when dealing with companies that are exclusively reagent and research chemical oriented. That is not the case with the essential oil and fragrance chemical companies. It is a whole different ball game, bubba ... 

J. Johnson, Getting a Grip on Wasted Energy, Chemical and Engineering News, pp. 31-33 (July 24, 2000). 

Brown, R. S. (2005). Zinc finger proteins getting a grip on RNA. Current Opinion in Chemical Biology, 15, 94—98. 

Caughey B, Baron GS, Chesebro B et al (2009) Getting a grip on prions oligomers, amyloids, and pathological membrane interactions. Annu Rev Biochem 78 177-204... 

Getting a grip on how DNA polymerases function. Nat. Struct. Biol., 8, 656-659. 

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