Aryl radical formation by aryl halide bond cleavage by a N-heterocyclic carbene catalyst
Aryl halides with a benzene ring directly bonded to a halogen atom are readily available and chemically stable, so they are used as a source of benzene rings in organic synthesis. For example, a chemical reaction that generates a highly reactive aryl.....»»
Tiny worms are helping scientists better understand fertility
Studying sex from just the male perspective misses half the experience. But much of what we know about the origins of reproductive cells comes from looking at sperm and egg formation separately—or only focusing on sperm......»»
Study suggests nature may have had a hand in shaping Great Sphinx of Giza
A trio of experimental physicists and applied mathematicians at New York University has found evidence that Egypt's Great Sphinx of Giza may have originated as a natural formation. For their study, published in the journal Physical Review Fluids, Sam.....»»
LHCb: Correlations show nuances of the particle birth process
High-energy ion collisions at the Large Hadron Collider are capable of producing a quark-gluon plasma. But are heavy atomic nuclei really necessary for its formation? And above all: how are secondary particles later born from this plasma? Further clu.....»»
Data from NASA’s Webb Telescope backs up ideas on planet formation
New data confirms the existence of a "snow line" in planet-forming disks. Enlarge / Image of a planet-forming disk, with gaps in between higher-density areas. (credit: ALMA(ESO/NAOJ/NRAO); C. Brogan, B. Saxton) Where do.....»»
Giant sea salt aerosols found to play major role in Hawai"i"s coastal clouds, rain
Despite their tiny sizes, aerosols, such as sea salt, dust, and ash, play a giant role in shaping weather and climate. These particles scatter light, act as the starting point for cloud formation, and can even initiate or limit rainfall. A new study.....»»
Understanding charged particles helps physicists simulate element creation in stars
New research from North Carolina State University and Michigan State University opens a new avenue for modeling low-energy nuclear reactions, which are key to the formation of elements within stars. The research lays the groundwork for calculating ho.....»»
What would happen to Earth if a rogue star came too close?
Stars are gravitationally fastened to their galaxies and move in concert with their surroundings. But sometimes, something breaks the bond. If a star gets too close to a supermassive black hole, for example, the black hole can expel it out into space.....»»
Where are all the double planets?
A recent study published in the Monthly Notices of the Royal Astronomical Society examines formation mechanisms for how binary planets—two large planetary bodies orbiting each other—can be produced from a type of tidal heating known as tidal diss.....»»
The formation of an excitonic Mott insulator state in a moiré superlattice
When a negatively charged electron and a positively charged hole in a pair remain bound together following excitation by light, they produce states known as excitons. These states can influence the optical properties of materials, in turn enabling th.....»»
The formation of switchable and metastable discrete structures through chiral self-sorting
A paper titled "Thermo-/Mechano-Chromic Chiral Coordination Dimer: Formation of Switchable and Metastable Discrete Structure through Chiral Self-Sorting" describes chiral coordination dimers that emerge based on effectively exclusive chiral self-sort.....»»
Study reveals wintertime formation of large pollution particles in China"s skies
School of Earth and Atmospheric Sciences researchers find dangerous sulfates are formed, and their particles get bigger, within the plumes of pollution belching from coal-fired power plants.....»»
ALMA observation of young star reveals details of dust grains
One of the primary goals of the Atacama Large Millimeter/submillimeter Array (ALMA) is to study the formation and evolution of planetary systems. Young stars are often surrounded by a disk of gas and dust, out of which planets can form......»»
Webb follows neon signs toward new thinking on planet formation
Scientists are following neon signs in a search for clues to one planetary system's future and the past of another—our own solar system. Following up on a peculiar reading by NASA's previous infrared flagship observatory, the now-retired Spitzer Sp.....»»
Study resolves puzzles in gravitational collapse of gravitational waves
Black holes are regions in space where the gravitational pull is so strong that nothing can escape them, not even light. These fascinating regions have been the focus of countless studies, yet some of the physics underlying their formation is not yet.....»»
Physics reveals secret of how nature helped sculpt the Great Sphinx of Giza
This ancient wonder may have started out as a natural formation known as a yardang. Enlarge / Experiments yield fresh evidence to support controversial hypothesis about the formation of the Great Sphinx of Giza. (credit: MusikAni.....»»
Study reveals how natural processes helped sculpt the Great Sphinx of Giza
This ancient wonder may have started out as a natural formation known as a yardang. Enlarge / Experiments yield fresh evidence to support controversial hypothesis about the formation of the Great Sphinx of Giza. (credit: MusikAni.....»»
Researchers realize highly selective CO hydrogenation to higher alcohols
Selective hydrogenation of carbon monoxide (CO) to higher alcohols (C2+OH) is a promising non-petroleum route for producing high-value chemicals, in which precise regulations of both C-O cleavage and C-C coupling are essential......»»
Researchers develop cheap and efficient ethanol catalyst from laser-melted nanoparticles
Ethanol fuel cells are regarded as promising sources of green electricity. However, expensive platinum catalysts are used in their production. Research on laser melting of suspensions carried out at the Institute of Nuclear Physics of the Polish Acad.....»»
17th-century anti-décolletage campaign was form of misogyny, author asserts
A 17th century French clerical/commercial campaign against décolletage—fashions in which women reveal the cleavage between their breasts—was motivated more by misogyny than moral outrage, according to a University of Kansas scholar......»»
Dwarf galaxies stripped of stars prove to be the missing link in the formation of rare ultra-compact dwarf galaxies
Astronomers using the Gemini North telescope, one-half of the International Gemini Observatory operated by NSF's NOIRLab, have captured the eroding remains of more than 100 dwarf galaxies as they transition into ultra-compact dwarf galaxies, objects.....»»