News tagged with luminescence
Research suggests cells communicate via biophotons
(Phys.org) -- Biologists have long been familiar with luminescence in organisms, where plants and animals produce visible light, but more intriguing perhaps is the newer field of study centered around biophotons, ...
May 23, 2012 |
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The acid test: 21st century pH meter
Modern methods for mass production of biological agents and fine chemicals require precise control of pH. However within these systems it is not always possible to use traditional methods for measuring acidity and alkalinity. ...
Mar 28, 2012 |
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Two-in-one imaging agents
(PhysOrg.com) -- Accurate visualization of living systems is key to the correct diagnosis and effective treatment of many diseases, as well as an improved understanding of biological processes. Magnetic resonance ...
Mar 19, 2012 |
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All-inorganic nanocrystals boost infrared emission
New chemistry has been developed to integrate lead chalcogenide nanocrystals into continuous inorganic matrices of chalcogenide glasses. Inorganic capping, rather than conventional organic capping ligands, ...
Nanotechnology / Nanomaterials
Mar 14, 2012 |
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New research points to erosional origin of linear dunes
Linear dunes, widespread on Earth and Saturn's moon, Titan, are generally considered to have been formed by deposits of windblown sand. It has been speculated for some time that some linear dunes may have ...
Space & Earth / Space Exploration
Feb 24, 2012 |
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Terahertz pulse increases electron density 1,000-fold
Researchers at Kyoto University have announced a breakthrough with broad implications for semiconductor-based devices. The findings, announced in the December 20 issue of the journal Nature Communications, may le ...
Dec 20, 2011 |
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'Label-free' imaging tool tracks nanotubes in cells, blood for biomedical research
(PhysOrg.com) -- Researchers have demonstrated a new imaging tool for tracking structures called carbon nanotubes in living cells and the bloodstream, which could aid efforts to perfect their use in biomedical ...
Nanotechnology / Bio & Medicine
Dec 05, 2011 |
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Trail of 'stone breadcrumbs' reveals the identity of one of the first human groups to leave Africa
A series of new archaeological discoveries in the Sultanate of Oman, nestled in the southeastern corner of the Arabian Peninsula, reveals the timing and identity of one of the first modern human groups to migrate out of Africa, ...
Other Sciences / Archaeology & Fossils
Nov 30, 2011 |
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Light vortex: Circularly polarized luminescence from a stirred and gelled solution of dye
(PhysOrg.com) -- Simple stirring can influence light, according to a report presented in the journal Angewandte Chemie by Kunihiko Okano and co-workers. Dye molecules locked in a gel send out “helical” ...
Oct 26, 2011 |
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100,000-year-old ochre toolkit and workshop discovered in South Africa
An ochre-rich mixture, possibly used for decoration, painting and skin protection 100,000 years ago, and stored in two abalone shells, was discovered at Blombos Cave in Cape Town, South Africa.
Other Sciences / Archaeology & Fossils
Oct 13, 2011 |
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Luminous grains of sand determine year of historic storm flood
Scientists at Delft University of Technology (TU Delft, The Netherlands) have successfully matched a layer of sediment from the dunes near Heemskerk to a severe storm flood that occurred in either 1775 or 1776. This type ...
Space & Earth / Earth Sciences
Oct 11, 2011 |
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Seeing red? Making carbon nanotubes clearer to the naked eye
If you were to look at a carbon nanotube with the naked eye you wouldn't see much more than black powder, but now a team of EU-funded scientists has developed a novel way of making these multi-purpose nanotechnology ...
Nanotechnology / Nanomaterials
Jul 11, 2011 |
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Night sky satellite luminescence images used to estimate economic levels
(PhysOrg.com) -- Applying statistical analysis to a truly inspirational idea, economic researchers Xi Chen and William D. Nordhaus used nighttime satellite images taken by the U.S. Department of Defense over ...
Space & Earth / Earth Sciences
May 17, 2011 |
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Don't Compare Bananas to Pears
(PhysOrg.com) -- Yellow leaves on banana plants give off a blue glow when viewed under UV light. This luminescence comes from decomposition products of chlorophyll, the substance that makes leaves green.
Jun 23, 2010 |
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New tool developed for DNA research: Molecular gauge to disclose function of new medications
Luminescent markers are an indispensable tool for researchers working with DNA. But the markers are troublesome. Some tend to destroy the function and structure of DNA when inserted. Others emit so little light, that they ...
Apr 06, 2010 |
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Luminescence
Luminescence is emission of light by a substance not resulting from heat; it is thus a form of cold body radiation. It can be caused by chemical reactions, electrical energy, subatomic motions, or stress on a crystal. This distinguishes luminescence from incandescence, which is light emitted by a substance as a result of heating. Historically, radioactivity was thought of as a form of "radio-luminescence", although it is today considered to be separate since it involves more than electromagnetic radiation. The term 'luminescence' was introduced in 1888 by Eilhard Wiedemann.
The dials, hands, scales and signs of aviation and navigational instruments and markings are often coated with luminescent materials in a process known as 'luminising'.
The following are types of luminescence
For more information about Luminescence, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
