News tagged with bleaching
Whiter laundry and a surprising new treatment for kids' eczema
It's best known for whitening a load of laundry. But now simple household bleach has a surprising new role: an effective treatment for kids' chronic eczema.
Medicine & Health / Diseases, Conditions, Syndromes
Apr 27, 2009 |
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Scientists say Asia's corals dying en masse
Coral reefs in Southeast Asia and the Indian Ocean are dying from the worst bleaching effect in more than a decade, Australian marine scientists said Tuesday.
Oct 19, 2010 |
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Cutting fishing could buy time for coral reefs
Stopping people fishing around Caribbean coral reefs by designating them legally protected marine reserves could help some of them survive the effects of a changing climate by more than 50 years.
Jun 29, 2011 |
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Corals can sense what's coming
Australian scientists have thrown new light on the mechanism behind the mass death of corals worldwide as the Earth's climate warms.
Nov 18, 2011 |
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Global warming threat to coral reefs: Can some species adapt?
Coral reefs are among the ecosystems most severely threatened by global warming, but hopeful new evidence has emerged that some coral species may be able to adapt to warmer oceans.
Mar 10, 2012 |
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Long-term recovery of reefs from bleaching requires local action to increase resilience
In the journal Estuarine, Coastal and Shelf Science, University of Miami Rosenstiel School of Marine and Atmospheric Science Professor Dr. Peter Glynn, and 2008 Pew Fellow for Marine Conservation and Assist ...
Feb 03, 2009 |
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Smithsonian reports regional sea temperature rise and coral bleaching event in Western Caribbean
The Smithsonian Tropical Research Institute's Bocas del Toro Research Station and Galeta Point Marine Laboratory are reporting an anomalous sea temperature rise and a major coral bleaching event in the western ...
Oct 12, 2010 |
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Discovery of the Jekyll-and-Hyde factors in 'coral bleaching'
Scientists are reporting the first identification of substances involved in the Jekyll-and-Hyde transformation that changes harmless marine bacteria into killers that cause "coral bleaching." Their study appears ...
Dec 02, 2009 |
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A tale of two atolls: Researchers study the impact of fishing on remote coral reefs
Coral reefs - kaleidoscopes of pink anemones and silver sharks - are the planet's most colorful ecosystems and among its most endangered, say marine scientists.
Jun 09, 2010 |
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'Green' hair bleach may become environmentally friendly consumer product
Scientists from Japan today reported development of what could be the world's first "green" hair bleach, an environmentally friendly preparation for lightening the color of hair on the head and other parts ...
Mar 24, 2009 |
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Remote Hawaii atoll corals suffer some bleaching
(AP) -- Corals at remote atolls northwest of the main Hawaiian islands suffered some bleaching this summer as ocean temperatures rose to higher-than-normal levels for a couple of weeks, but they were spared the large-scale ...
Sep 30, 2010 |
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Will coral reefs disappear?
This is the title of an upcoming symposium at the American Association for the Advancement of Science (AAAS) annual conference in San Diego, California. And it's a topic that should not be taken lightly.
Feb 22, 2010 |
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Bleach
Bleach refers to a number of chemicals that remove color, whiten, or disinfect, often via oxidation. Common chemical bleaches include household chlorine bleach (a solution of approximately 3–6% sodium hypochlorite, NaClO), lye, oxygen bleach (which contains either hydrogen peroxide or a peroxide-releasing compound), and bleaching powder (calcium hypochlorite). The bleaching process was known to most ancient civilizations and has been around for thousands of years. Modern bleaches resulted from the work of 18th century scientists including Swedish chemist Carl Wilhelm Scheele, French scientists Claude Berthollet and Antoine Germain Labarraque, and Scottish chemist Charles Tennant. Household chlorine bleach is created in two ways: by separating sodium hypochlorite from sea water or brine using electrolysis, or by adding chlorine gas to sodium hydroxide which produces sodium hypochlorite, water and sodium chloride.
Many bleaches have strong bactericidal properties, and are used for disinfecting and sterilizing.
Examples of peroxide-releasing compounds are sodium perborate, sodium percarbonate, sodium persulfate, tetrasodium pyrophosphate, or urea peroxide together with catalysts and activators, e.g., tetraacetylethylenediamine or sodium nonanoyloxybenzenesulfonate.
For more information about Bleach, read the full article at
Wikipedia.
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