Science

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Microscopy Reveals how Atom-High Steps Impede Oxidation of Metal Surfaces

Rust never sleeps. Whether a reference to the 1979 Neil Young album or a product designed to protect metal surfaces, the phrase invokes the idea that corrosion from oxidation-the more general chemical name for rust and other reactions of metal with oxygen-is an inevitable, persistent process. But a new study performed at the Center for Functional Nanomaterials at the U.S. Department of Energy's (DOE) Brookhaven National Laboratory reveals that certain features of metal surfaces can stop the process of oxidation in its tracks.

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Low-energy electron microscopy images of the nickel-aluminum surface before and after oxidation. The faint lines before oxidation indicate the atom-high steps that separate flat terrace sections of the crystal surface. As oxidation begins at a point on one terrace, the oxide spreads in elongated stripes along that terrace, pushing steps out of the way and bunching them closer and closer together. Eventually the bunching of steps stops the growth of the oxide stripe and another begins to form, often at right angles, to produce a grid-like pattern.

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Iranian Scientists Produce Silver Nanoparticles from Eucalyptus Extract

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Nanotechnology Applied to Remove Heavy Metallic Ions from Water

Iranian researchers used nanotechnology to produce super bio-magnetic sorbent for the removal of pollutions dissolved in water.

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Nanotechnology Increases Durability, Performance of Asphalt

Iranian researchers proposed the simultaneous use of nanoparticles and nanofibers to increase the resistance and lifetime of asphalt.

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New Evidence for a Mars Water Reservoir

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This illustration depicts Martian water reservoirs. Recent research provides evidence for the existence of a third reservoir that is intermediate in isotopic composition between the Red Planet’s mantle and its current atmosphere. These results support the hypothesis that a buried cryosphere accounts for a large part of the initial water budget of Mars.

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Production of Nanosorbent in Iran to Remove Aromatic Pollutants

Iranian researchers from Shahid Bahonar University of Kerman succeeded in the production of a sorbent with comparable advantages over the commercial sorbents in the extraction and removal of pollutants.

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Sun Sizzles in High-Energy X-Rays

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X-rays stream off the sun in this image showing observations from by NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, overlaid on a picture taken by NASA's Solar Dynamics Observatory (SDO).

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Nano Filter cleans dirty industry

Prototypes of nano-cellulose based filters with high purification capacity towards environmentally hazardous contaminants from industrial effluents eg. process industries, have been developed by researchers at Luleå University of Technology. The research, conducted in collaboration with Imperial College in the UK has reached a breakthrough with the prototypes and they will now be tested on a few industries in Europe.

- The bio-based filter of nano-cellulose is to be used for the first time in real-life situations and tested within a process industry and in municipal wastewater treatment in Spain. Other industries have also shown interest in this technology and representatives of the mining industry have contacted me and I have even received requests from a large retail chain in the UK, says Aji Mathew Associate Professor, Division of Materials Science at Luleå University.

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Getting into your head: Gelatin nanoparticles could deliver drugs to the brain

Stroke victims could have more time to seek treatment that could reduce harmful effects on the brain, thanks to tiny blobs of gelatin that could deliver the medication to the brain noninvasively.

The researchers found that gelatin nanoparticles could be laced with medications for delivery to the brain, and that they could extend the treatment window for when a drug could be effective. Gelatin is biocompatible, biodegradable, and classified as "Generally Recognized as Safe" by the Food and Drug Administration. Once administered, the gelatin nanoparticles target damaged brain tissue thanks to an abundance of gelatin-munching enzymes produced in injured regions.

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Production of Special Nanocomposite in Iran with Application in Railways

Iranian researchers from Sharif University of Technology succeeded in the production of a nanocomposite with appropriate mechanical properties and resistance against various environmental conditions.

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