Molecular Expressions: Images from the Microscope This site provides some wonderful images taken by use of optical microscopes, with the images covering everything from microrganisms, to biological molecules to superconductors to beer. Check out the photo gallery that provides many images of various materials either as collections of images or as a JAVA-based "virtual microscope". There is also a microscope primer that discusses aspects of microscope structure and function. But the most fun is the collection of "virtual microscopes" that allow the user to simulate use of a number of types of microscopes, all with focus, zoom and intensity controls.Recommended: JAVA-enabled browser

Nanoworld This Web site is maintained by The Centre for Microscopy and Microanalysis (located at the University of Queensland) which is: ". . . an interdisciplinary research and service facility dedicated to an understanding of the structure and composition of all materials at atomic, molecular, cellular and macromolecular scales." There are a couple of nice graphics dealing with the issue of scale, and a lot of information about microscopy in general (e.g., scanning electron microscope (SEM)). Their fine image gallery is certainly worth a look. (Caution: Some of the images are fairly large and may take a while to load/download, depending on the system you're using.)

Virtual Microscope This site JavaScript to create the illusion of controlling a Scanning Electron Microscope (SEM). You can control the magnification when observing a variety of objects (e.g., bee, diatom).Required: JAVA-enabled browser

The Center for In Vivo Microscopy The Center for In Vivo Microscopy is located in the Medical Center at Duke University and is "dedicated to the development and application of the technology of magnetic resonance microscopy (MRM) to basic and applied science." MRM is based on magnetic resonance imaging (MRI) technology and there is a nice introduction to the principles involved. Most interesting is the image and movie gallery which provides examples of MRM applied to the study of lungs, livers, the cochlea, embryos and plants.

The Scanning Electron Microscope This is a very interesting site that introduces the basics of scanning electron microscopy. There is a good discussion of how the technology works as well as a fine image library which includes a quiz composed of several SEMs. This site is maintained by The Museum of Science, Boston.

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