16 results found for microscopy

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00:35:00

Science with Combs of Light

by Theodor Hänsch
Science with Combs of Light
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 1569 views
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The spectrum of a frequency comb, commonly generated by a mode-locked femtosecond laser, consists of several hundred thousand precisely evenly spaced spectral lines. Such laser frequency combs have revolutionized the art of measuring the frequency of....

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00:33:00

Nanoscopy – allowing molecules to be examined inside living cells

by Eric Betzig
Nanoscopy – allowing molecules to be examined inside living cells
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 2861 views
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Eric Betzig shared the 2014 Chemistry Nobel prize with fellow American William E. Moerner and Romanian-German Stefan W. Hell for revolutionising science through the development of super-resolved fluorescence to exceed the accepted limits of tradition....

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00:31:00

Seeing is Believing – A Hundred Years of Visualizing Molecules

by Venkatraman Ramakrishnan
Seeing is Believing – A Hundred Years of Visualizing Molecules
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 1206 views
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It has been a hundred years since molecules were first visualized directly by using x-ray crystallography. That gave us our first look at molecules as simple as common salt to one as complex as the ribosome that has almost a million atoms. In the las....

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00:28:00

Optical Microscopy – the Resolution Revolution

by Stefan Hell
Optical Microscopy – the Resolution Revolution
for 18-22 and upwards,
Lectures | 18-22 and upwards | 8 years ago | 1245 views
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Throughout the 20th century it was widely accepted that a light microscope relying on conventional optical lenses cannot discern details that are much finer than about half the wavelength of light (200-400 nm), due to diffraction. However, in the 199....

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00:39:00

You can see a lot by observing: Optical Microscopy 2.0

by Steve Chu
You can see a lot by observing: Optical Microscopy 2.0
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1426 views
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Biological research and medicine were transformed by the invention and improvement of the optical microscope. Since the early 1990s, there has been another revolution in optical imaging, and manipulation of individual biological molecules and bio-mo....

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00:40:00

The Discovery of Quasi-Periodic Materials

by Dan Schectman
The Discovery of Quasi-Periodic Materials
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 1610 views
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Crystallography has been one of the mature sciences.  Over the years, the modern science of crystallography that started by experimenting with x-ray diffraction from crystals in 1912 has developed a major paradigm Ð that all crystals are ordered an....

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00:35:00

Quasi-Periodic Materials – Crystal Redefined

by Dan Schectman
Quasi-Periodic Materials – Crystal Redefined
for 18-22 and upwards,
Lectures | 18-22 and upwards | 9 years ago | 3016 views
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Crystallography has been one of the mature sciences.  Over the years, the modern science of crystallography that started by experimenting with x-ray diffraction from crystals in 1912, has developed a major paradigm that all crystals are ordered and ....

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00:31:00

Optical Coherence Tomography : The quest for Contrast

by Steven Matcher
Optical Coherence Tomography : The quest for Contrast
for 18-22 and upwards,
Postgraduate presentations | 18-22 and upwards | 11 years ago | 3290 views
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A survey of this useful technique

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00:03:00

Lensless imaging

by John Rodenburg
Lensless imaging
for 18-22 and upwards,
Lectures | 18-22 and upwards | 11 years ago | 1599 views
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John Rodenburg looks at novel ways of capturing highly enlarged images without the use of conventional lenses.

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00:02:00

Microscopy and Materials

by Mark Rainforth
Microscopy and Materials
for 18-22 and upwards,
Postgraduate presentations | 18-22 and upwards | 11 years ago | 1336 views
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How microscopy is used to improve materials

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01:00:00

How new science is transforming the optical microscope

by Brad Amos
How new science is transforming the optical microscope
for 18-22 and upwards,
Lectures | 18-22 and upwards | 11 years ago | 1872 views
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There are two rules for making an optical microscope; the lenses must be small, since defects of colour and focus increase with lens size, and the lenses must capture light from the object over as wide an angle as possible to record fine detail. This....

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01:05:00

Microscopy goes cold: secrets of frozen viruses

by Tony Crowther
Microscopy goes cold: secrets of frozen viruses
for 18-22 and upwards,
Lectures | 18-22 and upwards | 14 years ago | 1476 views
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Viruses are a major cause of death and disease. Too small to be seen by light microscopy, they were first visualised about 50 years ago by electron microscopy. Dr. Crowther describes his work on the development of the methods and illustrates how he h....

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