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Latest Oxide Stories

ce66277a2ba90e148fe38b102e04c3a3
2008-02-06 09:52:42

Squeeze a crystal of manganese oxide hard enough, and it changes from an electrical insulator to a conductive metal. In a report published online this week by the journal Nature Materials, researchers use computational modeling to show why this happens.The results represent an advance in computer modeling of these materials and could shed light on the behavior of similar minerals deep in the Earth, said Warren Pickett, professor of physics at UC Davis and an author on the study.Manganese...

2007-11-21 03:00:43

By Liang, Yong-mei Jun, Ma; Liu, Wei ABSTRACT: A laboratory study demonstrated that ferrate pretreatment significantly enhanced lead and cadmium removal in alum coagulation, under the conditions of natural surface water. The enhancement of lead removal was approximately 21 to 37% by ferrate pretreatment at a dosage of 1 to 5 mg/L. The enhanced removal of cadmium by ferrate pretreatment at a dosage of 1 to 5 mg/L exceeded the removal by alum coagulation alone 2- to 12-fold. Cadmium is much...

6dfc40a071ba077cad7ffafcfbfbe4fc
2007-10-02 18:12:22

Minerals act as oxygen reservoirs, stopping the earth from becoming a barren planet   If our planet did not have the ability to store oxygen in the deep reaches of its mantle there would probably be no life on its surface. This is the conclusion reached by scientists at the University of Bonn who have subjected the mineral majorite to close laboratory examination. Majorite normally occurs only at a depth of several hundred kilometres - under very high pressures and temperatures....

2007-04-13 06:00:26

By Cha, S C The aim of this work is to investigate the corrosion behaviour of superheater materials below deposited ashes in biomass combusting atmospheres. The materials were exposed in three different settings (without deposits, with filter ash and with cyclone ash). Exposure tests were carried out with variation of water and HCl content for 360 h at 535C. The HCl addition led to higher mass losses of materials than those without HCl addition. The rate of mass loss is proportional to the...

6a877009ffc714c710946b83dbbf72fb1
2006-03-27 14:00:00

A new Pacific Northwest National Laboratory study offers the most detailed picture to date on how oxygen can be made in frigid reaches far from Earth ATLANTA-- Some may be surprised to learn that bleach-blondes and the enabler of life elsewhere in our solar system have something in common. And, no, it's not intelligence. It is, in fact, hydrogen peroxide. But how that hydrogen peroxide emerges from ice to become life-sustaining oxygen has been unclear. Now, a new study at the Department of...

2005-09-27 13:37:24

Many advanced material fabrication techniques use multi-step processes that can be environmentally stressing, energy-consuming and have high-costs. In an article published in AZojomo* researchers have described a novel method called "Localized Hydrothermal Technique" for growing coatings of barium titanate or other complex oxides on titanium. In this method, thin films grow on transition metal substrates by Joule heating of the substrate while it is immersed in an aqueous alkali-earth...

2005-08-09 18:33:39

A number of hypotheses have been used to explain how free oxygen first accumulated in Earth's atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers plausible scenarios for how oxygen came to dominate the atmosphere, and why it took at least 300 million years after bacterial photosynthesis started producing oxygen in large quantities. The big reason for the long delay was that processes such as volcanic gas production acted as sinks to...

66f48ee21f93681666c276b1044f2f9e1
2005-08-09 05:31:15

A number of hypotheses have been used to explain how free oxygen first accumulated in Earth's atmosphere some 2.4 billion years ago, but a full understanding has proven elusive. Now a new model offers plausible scenarios for how oxygen came to dominate the atmosphere, and why it took at least 300 million years after bacterial photosynthesis started producing oxygen in large quantities. The big reason for the long delay was that processes such as volcanic gas production acted as sinks to...


Latest Oxide Reference Libraries

Acid Rain
2013-04-01 10:21:17

Acid rain is any form of precipitation that is unusually acidic, meaning that is possesses high levels of hydrogen ions. It can have harmful effects on aquatic animals, plants, and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide, which react with the water molecules within the atmosphere to produce acids. Nitrogen oxides can be produced naturally by lightening strikes. Sulfur dioxide can be produced naturally by volcanic eruptions. The chemicals that are...

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Word of the Day
bibliopole
  • A bookseller; now, especially, a dealer in rare and curious books.
This word comes from a Greek phrase meaning 'book seller.'
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