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2008-01-31 14:37:45

TEMPE, Ariz. -- Water has some amazing properties. It is the only natural substance found in all three states "” solid, liquid and gas "” within the range of natural Earth temperatures. Its solid form is less dense than its liquid form, which is why ice floats. It can absorb a great deal of heat without getting hot, has very high surface tension (helping it move through roots and capillaries "” vital to maintaining life on Earth) and is virtually incompressible. A less...

2005-08-29 15:05:00

Automobile bumpers that deform and recover rather than crack and splinter, computer cases that withstand the occasional rough encounter, and resilient coatings that can withstand the ravages of the sun, may all be possible if tiny functionalized rubbery particles are imbedded in their plastic matrices, according to Penn State materials scientists. "Plastics such as polypropylene, nylon, polycarbonate, epoxy resins and other compounds are brittle and fracture easily," says Dr. T.C. Chung,...


Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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