Science

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Strong odour challenge of mercaptans

NHC Catalytic system, developed in the Ananikov laboratory, targeted on alternative technology of chemical utilization of organic sulfur species from crude oil.

Mercaptans or thiols are a special class of organic compounds that contains sulfur functional group, RSH. Various sulfur compounds are highly demanded in the formation of new materials in photonics, optics, pharmaceutical industry, organic chemistry, and nanotechnology.

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Made to order: Researchers discover a new form of crystalline matter: Experiments reveal a new type of imposed ordering of particles in dusty plasma

Dust is everywhere: under the bed, on the stairs and even inside of plasmas. A team of researchers from Auburn University, the University of Iowa and the University of California, San Diego, using the new Magnetized Dusty Plasma Experiment (MDPX), the first U.S. experiment of its kind, recently discovered a new form of crystalline-like matter in strongly magnetized dusty plasma.

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Figure 1: [Left] Typical plasma crystal with a self-ordered, hexagonal arrangement of dust particles indicated by the bright white spots. [Middle] Made to order square pattern formed in an imposed dust crystalline-like structure. [Right] A typical dusty plasma illuminated by a green laser in the MDPX experiment at Auburn University.
Figure 2: Breakup of the dust grid structure is observed as the background neutral pressure is increased from low to high pressure. Each image is a sum of over 100 individual picture frames to reveal the motion of the dust particle trajectories. With increasing pressure the particles "unlock" from the grid generated crystal and begin to flow, first from lattice site to lattice site, and then forming a swirling pattern at high pressure. The yellow boxes show close-ups of the observed particle pattern at different pressures for the area highlighted in the left figure.

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Onion-like layers help this efficient new nanoparticle glow: A dye-coated surface is 1 of 3 specially crafted layers that help the particle emit light ideal for bioimaging

A new, onion-like nanoparticle could open new frontiers in biomaging, solar energy harvesting and light-based security techniques.

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An artist's rendering shows the layers of a new, onion-like nanoparticle whose specially crafted layers enable it to efficiently convert invisible near-infrared light to higher energy blue and UV light.

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Quantum dots made from fool's gold boost battery performance

If you add quantum dots - nanocrystals 10,000 times smaller than the width of a human hair - to a smartphone battery it will charge in 30 seconds, but the effect only lasts for a few recharge cycles.

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Vanderbilt graduate student Anna Douglas holding one of the batteries that she has modified by adding millions of quantum dots made from iron pyrite, fool's gold.

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Sunscreen ingredient may prevent medical implant infections

A common ingredient in sunscreen could be an effective antibacterial coating for medical implants such as pacemakers and replacement joints.

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The illustration shows a pacemaker lead with a coating of nanoscale zinc oxide pyramids. These pyramids prevent MRSA, an antibiotic-resistant strain of bacteria common in hospitals, from colonizing coated surfaces well.

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Microwave field imaging using diamond and vapor cells

Microwave field imaging is becoming increasingly important, as microwaves play an essential role in modern communications technology and can also be used in medical diagnostics. Researchers from the Swiss Nanoscience Institute and the Department of Physics at the University of Basel have now independently developed two new methods for imaging microwave fields. Both methods exploit the change in spin states induced by an applied microwave field, as reported".

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Imaging of microwave fields is made possible by measuring of spin changes in individual atoms or electrons.

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Clay makes better high-temp batteries: Rice University scientists develop materials to power devices in harsh environments

A unique combination of materials developed at Rice University, including a clay-based electrolyte, may solve a problem for rechargeable lithium-ion batteries destined for harsh environments.

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Batteries with clay-based electrolyte/separators were tested at up to 120 degrees Celsius and showed strong performance over 120 charge-discharge cycles, according to scientists at Rice University.

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Tomatoes get boost in growth, antioxidants from nano-sized nutrients

With the world population expected to reach 9 billion by 2050, engineers and scientists are looking for ways to meet the increasing demand for food without also increasing the strain on natural resources, such as water and energy -- an initiative known as the food-water-energy nexus.

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This illustration shows the different effects of the application of nano nutrients on a tomato plant.

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Efforts to Obtain Drug Carrier Nanofibers to Treat Wounds

Iranian researchers produced and studied laboratorial samples of nanofibers that have application in the treatment of wound and infection thanks to their antibacterial properties and ability to prevent the extension of infection.

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Tomatoes get boost in growth, antioxidants from nano-sized nutrients

Ramesh Raliya, PhD, a postdoctoral researcher, and Pratim Biswas, PhD, the Lucy & Stanley Lopata Professor and chair of the Department of Energy, Environmental & Chemical Engineering, both at the School of Engineering & Applied Science at Washington University in St. Louis, are addressing this issue by using nanoparticles to boost the nutrient content and growth of tomato plants. Taking a clue from their work with solar cells, the team found that by using zinc oxide and titanium dioxide nanoparticles, the tomato plants better absorbed light and minerals, and the fruit had higher antioxidant content.