Showing 20 articles starting at article 541
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Categories: Chemistry: General, Space: Cosmology
Published Spying on a shape-shifting protein
(via sciencedaily.com) Original source Researchers are using crystallography to gain a better understanding of how proteins shapeshift. The knowledge can provide valuable insight into stopping and treating diseases.
Published Surprise gamma-ray feature beyond our galaxy
(via sciencedaily.com) Original source Astronomers analyzing 13 years of data from NASA's Fermi Gamma-ray Space Telescope have found an unexpected and as yet unexplained feature outside of our galaxy.
Published Bulky additives could make cheaper solar cells last longer
(via sciencedaily.com) Original source An insight into preventing perovskite semiconductors from degrading quickly could help enable solar cells estimated to be two to four times cheaper than today's thin-film solar panels.
Published Molecularly designing polymer networks to control sound damping
(via sciencedaily.com) Original source The world is filled with a myriad of sounds and vibrations -- the gentle tones of a piano drifting down the hall, the relaxing purr of a cat laying on your chest, the annoying hum of the office lights. Imagine being able to selectively tune out noises of a certain frequency. Researchers have now synthesized polymer networks with two distinct architectures and crosslink points capable of dynamically exchanging polymer strands to understand how the network connectivity and bond exchange mechanisms govern the overall damping behavior of the network. The incorporation of dynamic bonds into the polymer network demonstrates excellent damping of sound and vibrations at well-defined frequencies.
Published Towards realizing eco-friendly and high-performance thermoelectric materials
(via sciencedaily.com) Original source In a new study, environmentally benign inverse-perovskites with high energy conversion efficiency have been reported by scientists with potential for practical application as thermoelectric materials (TEMs). Addressing the limitations typically faced with TEMs, such as insufficient energy conversion efficiency and environmental toxicity due to heavy elements, the new TEMs provide a suitable alternative to TEMs based on toxic elements with better thermoelectric properties than conventional eco-friendly TEMs.
Published Catalytic combo converts CO2 to solid carbon nanofibers
(via sciencedaily.com) Original source Scientists have developed a way to convert carbon dioxide (CO2), a potent greenhouse gas, into carbon nanofibers, materials with a wide range of unique properties and many potential long-term uses. Their strategy uses tandem electrochemical and thermochemical reactions run at relatively low temperatures and ambient pressure and could successfully lock carbon away to offset or even achieve negative carbon emissions.
Published Potential solvents identified for building on moon and Mars
(via sciencedaily.com) Original source Researchers have taken the first steps toward finding liquid solvents that may someday help extract critical building materials from lunar and Martian-rock dust, an important piece in making long-term space travel possible. Using machine learning and computational modeling, researchers have found about half a dozen good candidates for solvents that can extract materials on the moon and Mars usable in 3D printing. The powerful solvents, called ionic liquids, are salts that are in a liquid state.
Published Generating stable qubits at room temperature
(via sciencedaily.com) Original source Quantum bits, or qubits, can revolutionize computing and sensing systems. However, cryogenic temperatures are required to ensure the stability of qubits. In a groundbreaking study, researchers observed stable molecular qubits of four electron spins at room temperature for the first time by suppressing the mobility of a dye molecule within a metal-organic framework. Their innovative molecular design opens doors to materials that could drive the development of quantum technologies capable of functioning in real-world conditions.
Published Is there a common link between the physical and social worlds? Two brothers think so
(via sciencedaily.com) Original source A Rutgers biophysical chemist and his brother, a political scientist on the West Coast, have joined intellectual forces, realizing a long-standing dream of co-authoring an article that bridges their disciplines involving cells and society. In their paper, they have proposed that powerful parallels exist between the microscopic, natural world of cells and molecules and the human-forged realm of organizations and political systems.
Published Making an important industrial synthesis more environmentally friendly
(via sciencedaily.com) Original source Researchers have resolved a problem that has limited the environmental sustainability of peracid synthesis. By judicious choice of the solvent and light input, approximately room-temperature autoxidation of aldehydes proceeds in a manner that results in industrially useful peracids or carboxylic acids. This work is an important advance in green chemistry that will help minimize the carbon footprint of the chemical industry.
Published Researchers step closer to mimicking nature's mastery of chemistry
(via sciencedaily.com) Original source In nature, organic molecules are either left- or right-handed, but synthesizing molecules with a specific 'handedness' in a lab is hard to do. Make a drug or enzyme with the wrong 'handedness,' and it just won't work. Now chemists are getting closer to mimicking nature's chemical efficiency through computational modeling and physical experimentation.
Published Dry-cleaning fluid becomes a synthetic chemist's treasure
(via sciencedaily.com) Original source The widely used dry-cleaning and degreasing solvent perc can be converted to useful chemicals by a new clean, safe and inexpensive procedure. The discovery using on-demand UV activation may open the path to upcycling perc and thus contribute to a more sustainable society.
Published The reaction mechanism for catalytic ammonia production experimentally determined
(via sciencedaily.com) Original source Researchers have now been able to study the surface of iron and ruthenium catalysts when ammonia is formed from nitrogen and hydrogen. A better knowledge of the catalytic process and the possibility of finding even more efficient materials opens the door for a green transition in the currently very CO2-intensive chemical industry.
Published Epic of a molecular ion: With eyes of electrons
(via sciencedaily.com) Original source Researchers have achieved real-time capture of the ionization process and subsequent structural changes in gas-phase molecules through an enhanced mega-electronvolt ultrafast electron diffraction (MeV-UED) technique, enabling observation of faster and finer movements of ions.
Published Inspired by Greek mythology, this potential drug shows promise for vanquishing Parkinson's RNA in early studies
(via sciencedaily.com) Original source A new discovery takes its inspiration from Greek mythology. The compound is described as a chimera, because it battles a toxic cause of Parkinson's in two ways.
Published 'Blob-like' home of farthest-known fast radio burst is collection of seven galaxies
(via sciencedaily.com) Original source In summer 2022, astronomers detected the most powerful and most distant fast radio burst (FRB) ever observed. Now, astronomers have pinpointed the extraordinary object's birthplace -- and it's rather curious, indeed. Using images from NASA's Hubble Space Telescope, the researchers traced the FRB back to not one galaxy but a group of at least seven galaxies.
Published The first domino falls for redox reactions
(via sciencedaily.com) Original source Transmitting an effect known as a domino reaction using redox chemistry has been achieved for the first time.
Published Chemists develop new approach to inserting single carbon atoms
(via sciencedaily.com) Original source Chemists have presented a new approach in which a single carbon atom is inserted into the carbon skeleton of cyclic compounds in order to adjust the ring size. The method could be relevant, for example, for the production of active ingredients in new pharmaceutical products.
Published Final supernova results from Dark Energy Survey offer unique insights into the expansion of the universe
(via sciencedaily.com) Original source In the culmination of a decade's worth of effort, scientists analyzed an unprecedented sample of more than 1,500 supernovae classified using machine learning. They placed the strongest constraints on the expansion of the universe ever obtained with the DES supernova survey. While consistent with the current standard cosmological model, the results do not rule out a more complex theory that the density of dark energy in the universe could have varied over time.
Published Solid state battery design charges in minutes, lasts for thousands of cycles
(via sciencedaily.com) Original source Researchers have developed a new lithium metal battery that can be charged and discharged at least 6,000 times -- more than any other pouch battery cell -- and can be recharged in a matter of minutes. The research not only describes a new way to make solid state batteries with a lithium metal anode but also offers new understanding into the materials used for these potentially revolutionary batteries.