Science

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Immunomodulatory effect of nanoparticles

Polymeric nanoparticles for immunotherapy represent a dynamic research field. The possibility to control their size, charge, and other surface properties provides the opportunity to affect both uptake by immune cells and induction of immunity. Dendritic cells (DC), which represent the most potent antigen-presenting cells of the immune system, are one of the main targets of current NP-based immunotherapeutic approaches against tumors.

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NASA's NuSTAR Spots Flare From Milky Way's Black Hole

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NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR, has captured these first, focused views of the supermassive black hole at the heart of our galaxy in high-energy X-ray light.

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NRL Researchers Discover New Route to Spin-Polarized Contacts on Silicon

Scientists at the Naval Research Laboratory have demonstrated that graphene, a single layer of carbon atoms in a honeycomb lattice, can serve as a low resistance spin-polarized tunnel barrier contact which successfully enables spin injection/detection in silicon from a ferromagnetic metal. The graphene provides a highly uniform, chemically inert and thermally robust tunnel barrier free of defects and trap states which plague oxide barriers. This discovery clears an important hurdle to the development of future semiconductor spintronic devices, that is, devices which rely on manipulating the electron's spin rather than its charge for low-power, high-speed information processing beyond the traditional size scaling of Moore's Law.

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NRL scientists successfully used graphene, a single layer of carbon atoms in a honeycomb lattice (gray), as a tunnel barrier to electrically inject spin polarized electrons from a ferromagnetic NiFe contact (red) into a silicon substrate (purple). The net spin accumulation in the silicon produces a voltage, which can be directly measured. Spin injection, manipulation and detection are the fundamental elements allowing information processing with the electron spin rather than its charge.

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Scientists Determine Mechanical Properties of Bone Cement by Nanotechnology

Researchers in Iran University of Science and Technology succeeded in the characterization of bone cement by using nanoindentation and nano scratch tests.

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Quasar May Be Embedded in Unusually Dusty Galaxy

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This artist's impression of one of the most distant, oldest, brightest quasars ever seen is hidden behind dust. The quasar dates back to less than one billion years after the big bang. The dust is also hiding the view of the underlying galaxy of stars that the quasar is presumably embedded in.

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Active Region on the Sun Emits Another Flare

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By observing the sun in a number of different wavelengths, NASA's telescopes can tease out different aspects of events on the sun. These four images of a solar flare on Oct. 22, 2012, show from the top left, and moving clockwise: light from the sun in the 171 Angstrom wavelength, which shows the structure of loops of solar material in the sun's atmosphere, the corona; light in 335 Angstroms, which highlights light from active regions in the corona; a magnetogram, which shows magnetically active regions on the sun; light in the 304 Angstrom wavelength, which shows light from the region of the sun's atmosphere where flares originate.

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Feeling the Force of Cancer

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Using ARTIDIS to feel the tissue structure of a tumor biopsy by a nanometer-sized atomic force microscope tip

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Split-Personality Elliptical Galaxy Holds a Hidden Spiral

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Iranian Scientists Fabricate Magnetic Nano-Adsorbent to Measure Toxic Metals

Iranian researchers succeeded in the production of modified magnetic magnetite nano-adsorbent (Fe3O4) through chemical deposition method, and successfully doped the toxic metal ions to measure them in low concentrations in the environment.

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Iran Produces New Nano-Sensor to Detect Tinidazole Medicine

Iranian researchers at Sharif University of Technology synthesized glass carbon electrode modified with a thin film of carbon nanotubes and gold nanoparticles, and used it as a nano-sensor to detect and measure tinidazole medicine with a precision of 10 nanomolars.

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