News tagged with heterogeneity
Processes at the surface of catalysts: Oxygen defects act as active centers
In chemical industry, heterogeneous catalysis is of crucial importance to the manufacture of basic or fine chemicals, in catalytic converters of exhaust gas, or for the chemical storage of solar energy. Scientists ...
Apr 10, 2012 |
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Gases drawn into particles stay there
(Phys.org) -- Contrary to expectations, formation and growth of complex organic particles generated during oxidation of volatile organic molecules by ozone and nitrate follows a non-equilibrium path, according ...
Apr 09, 2012 |
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Learning about material integrity from statistical data
Whether it protects space satellites or sequesters nuclear waste, scientists want to understand tiny features that could significantly alter how a material behaves. Locating microscopic defects can be done ...
Feb 07, 2012 |
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Online activity grows in a similar pattern to those of real-life networks
The activity of online communities does not grow in line with the number of users, according to a model recently published in the European Physical Journal B.
Sep 01, 2011 |
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Stable temperatures boost biodiversity in tropical mountains
We often think of rainforests and coral reefs as hotspots for biodiversity, but mountains are treasure troves for species too -- especially in the tropics, scientists say. But what drives montane biodiversity? The diversity ...
Jun 08, 2011 |
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Researchers advance understanding of wetting of nanopatterned surfaces
(PhysOrg.com) -- Virginia Commonwealth University researchers have identified the molecular mechanisms at play for the non-additive wetting free energies at chemically heterogeneous surfaces.
Apr 21, 2011 |
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Novel approach uses ion-molecule collisions, deposition to create sought-after material
(PhysOrg.com) -- Once only possible with expensive liquids and large amounts of waste, scientists can now create an efficient, easy-to-separate catalyst with small amounts of material, thanks to an innovative ...
Mar 14, 2011 |
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A personality change for a catalyst
For more than 40 years, an ambition of catalysis science has been to persuade homogeneous catalysts to behave more like heterogeneous catalysts, while still maintaining their activity and exquisite selectivity. Professor ...
Mar 07, 2011 |
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Entangled frameworks limber up
The degree of interconnectivity of molecular frameworks in microporous materials influences their structural flexibility and gas sorption
Sep 20, 2010 |
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A laser shines light on the catalytic converter
(PhysOrg.com) -- Catalytic converters are encountered everywhere in our cars and in the chemical industry. However, the chemical reaction is not well understood. A discovery made at the EPFL may help to shed light on a field ...
Aug 03, 2010 |
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Face processing slows with age
Identifying a face can be difficult when that face is shown for only a fraction of a second. However, young adults have a marked advantage over elderly people in these conditions. Researchers writing in the open access journal ...
Medicine & Health / Neuroscience
Sep 08, 2009 |
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Breast cancer etiology may vary by subtype
Women's reproductive and lifestyle characteristics can be linked to different invasive breast cancer subtypes. Data on 2544 breast cancer cases, presented in the open access journal Breast Cancer Research, suggests that t ...
May 21, 2009 |
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Dutch chemists make new chiral palladium metal
Researchers at the University of Amsterdam (UvA) have succeeded in making the first ever piece of chiral palladium metal. The findings, by a research team led by Gadi Rothenberg, professor of Heterogeneous Catalysis and Sustainable ...
Apr 23, 2009 |
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Flexible, transparent supercapacitors -- bend and twist them like a poker card
It is a completely transparent and flexible energy conversion and storage device that you can bend and twist like a poker card.
Mar 31, 2009 |
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What determines the size of giant dunes?
Physicists at the Laboratory of Physics and Mechanics of Heterogeneous Media (CNRS / Université Paris Diderot / ESPCI ParisTech / Université Pierre et Marie Curie) have shown, in collaboration with scientists ...
Mar 04, 2009 |
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