Question #86832
1 Answer
Electron microscopes, light microscopes,
Explanation:
Advanced versions of electron microscopes have been used to produce images of molecules and atoms.
Using electron microscopes, we can see the thinnest cell walls, giving us a greater example of how diffusion, facilitated diffusion and active uptake are used to transfer molecules across a cell wall, vital for living organisms.
Light microscope is the oldest, simplest and most widely-used form of microscopy technique. Specimens are illuminated with light, which is focused using glass lenses and viewed using the eye or photographic film. Specimens that are subject to examination can be alive or dead, but generally need to be stained with a colored dye to make them visible. Many different stains are available that stain specific parts of the cell such as DNA, lipids, cytoskeleton, etc.
There has been a recent resurgence in the use of light microscopy, partly thanks to technical improvements, which have dramatically improved the resolution beyond the theoretical limit. For example fluorescence microscopy has a resolution of about 10 nm, while interference microscopy has a resolution of about 1 nm.
Optical coherence microscopy has the capability for use in the developmental biology in its capacity to image tissue areas that are unobtainable to standard microscopes. The high light dispersion characteristics of biological tissue make such methods as two-photon and confocal microscopy worthless for imaging a lot underneath the surface covering of tissue. Optical coherence microscopy prevails over this constraint letting three-dimensional imaging of cells or clusters of cells at depths of equal to one millimeter underneath the surface. The concept of the equipment facilitates imaging of biological samples safely and insidiously permitting the procedures to be observed in vivo. The method of the researchers to optical coherence microscopy offers a technique for creating three-dimensional time-lapse movies of tissue formation, an apparent benefit for developmental biologists with the help of contemporary visualization software.
References:
EcoGlobe. http://eco-globe.com/types-of-microscope/
WikiEducator. http://oeruniversitas.com/'Microscopes_and_Their_Uses_in_Biology'
