Immunology

Structure of a key 'trigger' of immune response solved

An international collaboration, involving researchers from Monash University and the University of Oxford, has led to a breakthrough in our understanding of how immune responses are started. The study has been published in ...

Ophthalmology

Novel mechanism of retinal degeneration

Photoreceptors, like polarized sensory neurons, are essential for light sensation and phototransduction, which are highly dependent on the photoreceptor cilium. Disruption of photoreceptor cilia has been implicated in a variety ...

Medical research

Researchers uncover molecular details of muscle contraction

The connections between the nervous system and muscles develop differently across the kingdom of life. It takes newborn humans roughly a year to develop the proper muscular systems that support the ability to walk, while ...

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Electron microscope

An electron microscope is a type of microscope that uses a particle beam of electrons to illuminate a specimen and create a highly-magnified image. Electron microscopes have much greater resolving power than light microscopes that use electromagnetic radiation and can obtain much higher magnifications of up to 2 million times, while the best light microscopes are limited to magnifications of 2000 times. Both electron and light microscopes have resolution limitations, imposed by the wavelength of the radiation they use. The greater resolution and magnification of the electron microscope is because the wavelength of an electron; its de Broglie wavelength is much smaller than that of a photon of visible light.

The electron microscope uses electrostatic and electromagnetic lenses in forming the image by controlling the electron beam to focus it at a specific plane relative to the specimen. This manner is similar to how a light microscope uses glass lenses to focus light on or through a specimen to form an image.

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