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IMAGE: 3D reconstructions showing the precursors of the large bacterial ribosomal subunit and the bound helper proteins. view more
Credit: Nikolay/Charité.
Ribosome formation is viewed as a promising potential target for new antibacterial agents. Researchers from Charité - Universitätsmedizin Berlin have gained new insights into this multifaceted process. The formation of ribosomal components involves multiple helper proteins which, much like instruments in an orchestra, interact in a coordinated way. One of these helper proteins - protein ObgE - acts as the conductor, guiding the entire process. The research, which produced the first-ever image-based reconstruction of this process, has been published in
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IMAGE: Transition metals stitched into graphene with an electron beam form promising quantum building blocks. view more
Credit: Ondrej Dyck, Andrew Lupini and Jacob Swett/ORNL, U.S. Dept. of Energy
Materials - Quantum building blocks
Oak Ridge National Laboratory scientists demonstrated that an electron microscope can be used to selectively remove carbon atoms from graphene s atomically thin lattice and stitch transition-metal dopant atoms in their place.
This method could open the door to making quantum building blocks that can interact to produce exotic electronic, magnetic and topological properties.
This is the first precision positioning of transition-metal dopants in graphene. The produced graphene-dopant complexes can exhibit atomic-like behavior, inducing desired properties in the graphene.
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IMAGE: Electron microscopy shows the graphene sample (gray) in which the helium beam has created a hole pattern so that the density varies periodically. This results in the superposition of vibrational. view more
Credit: K. Höflich/HZB
Without electronics and photonics, there would be no computers, smartphones, sensors, or information and communication technologies. In the coming years, the new field of phononics may further expand these options. That field is concerned with understanding and controlling lattice vibrations (phonons) in solids. In order to realize phononic devices, however, lattice vibrations have to be controlled as precisely as commonly realized in the case of electrons or photons.
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IMAGE: Rice University graduate student Grant Gorman at work in Rice s Ultracold Atoms and Plasmas Lab. view more
Credit: Photo by Jeff Fitlow/Rice University
HOUSTON - (March 1, 2021) - Rice University physicists have discovered a way to trap the world s coldest plasma in a magnetic bottle, a technological achievement that could advance research into clean energy, space weather and astrophysics. To understand how the solar wind interacts with the Earth, or to generate clean energy from nuclear fusion, one has to understand how plasma a soup of electrons and ions behaves in a magnetic field, said Rice Dean of Natural Sciences Tom Killian, the corresponding author of a published study about the work in