An individual projecting microscopic tube in the spinnerets from which spiders produce silk.

Then microscopic tubes inside the dentin allow hot, cold, or sweet foods to stimulate nerves within the tooth.

The scientists were working with so-called buckytubes, microscopic tubes made of carbon that are related to the more well-known buckyballs.

Electrospun nanofibers are prepared using microscopic tubes that range between 100 to 200 nanometers in diameter.

A microscopic tube.

Since then chemists have synthesized some 5,000 variants of the buckyball, including elongated spheroids, sheets of carbon and microscopic tubes.

Take the experience of researchers at DuPont, who are testing microscopic tubes of carbon, known as nanotubes, valued for their extraordinary strength and electrical conductivity.

But mushrooms are just temporary reproductive structures, occasionally stuck up by the real body of the fungi below: a relatively permanent network of microscopic tubes that spread through the soil and absorb nutrients.

JAPANESE and American research teams have discovered two different ways to make bulk quantities of carbon "nanotubes," microscopic tubes with walls whose standard thickness is only a single atom.

Scientists working on these microscopic tubes believe they can be bound together like the fibers in rope, and that in such form they will be stronger than steel or any other material in existence.

As bovine muscle he existed long ago in the food which nourished his parents; still farther back he was eaten by an ox in the form of some succulent weed of the pasture, and that very weed educed him from the soil through microscopic tubes by capillary attraction.

From this cavity the milk flows through a microscopic tube which unites with similar tubes to form a larger one; this in turn joins others of its kind; and so on, until ultimately the milk enters a relatively large duct-- the figurative stem of the cluster--which conducts the milk to its destination.

Dr. Smalley's group reported in the current issue of the journal Nature, however, that carbon "nanotubes," microscopic tubes that are actually long molecules of carbon atoms arrayed in a nested cylindrical chicken-wire pattern, are far more resilient than the metal whiskers usually used as probes in the scanning tunneling microscope.