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.....»»
Electrochemical flow aziridination of terpenes
Due to the inherent physiological properties of nitrogen-containing heterocyclic moieties, the construction of nitrogen-containing compounds has emerged as one of the central issues in contemporary synthetic chemistry over recent decades. Among these.....»»
Researchers design efficient iridium catalyst for hydrogen generation
The energy demands of the world are ever increasing. In our quest for clean and eco-friendly energy solutions, transportable hydrogen energy offers considerable promise. In this regard, proton exchange membrane water electrolyzers (PEMWEs) that conve.....»»
Researchers show cells communicate by pulling on a fiber network
Mechanics play a larger role in blood vessel formation and other developmental biology than previously thought. Cells appear to respond to mechanical signals, such as pressure. Through the extracellular matrix, a network of fibrous proteins, cells ca.....»»
Researchers visualize novel catalyst at work
A novel catalysis scheme enables chemical reactions that were previously virtually impossible. A method developed at the University of Bonn is also environmentally friendly and does not require rare and precious metals......»»
Experts say radical shift needed in our relationship with the environment
A radical shift in our relationship with the environment is needed and it is time we intervene in the extinction crisis, experts say......»»
A novel method uses gravity data to determine where density anomalies lie inside planetary bodies
Getting to know planets or moons inside out isn't easy. Like Earth and its moon, many celestial bodies are multilayered and can contain anomalous internal features that reflect the complex history of their formation, collisions with other bodies, and.....»»
The role of bubble formation in sustainable hydrogen production
The sustainable production of hydrogen could potentially be made more efficient by adding a cleverly chosen salt to the process. Researchers at the Leiden Institute of Chemistry (LIC), in collaboration with physicists at the University of Twente, hav.....»»
New paleoaltimetry research questions assumptions about the formation of the Himalayas
Mountain ranges play a key role in global climate, altering weather and shaping the flora and fauna that inhabit their slopes and the valleys below. As warm air rises windward grades and cools, moisture condenses into rain and snow. On the leeward si.....»»
Ditching the young entrepreneur myth: Research shows over-50s are the more radical innovators
Julie Wainwright—working as a CEO for almost two decades—was in her mid-50s when she created The RealReal platform for secondhand luxury. Harland Sanders was 62 when he started Kentucky Fried Chicken (KFC) restaurant chain, and Bernie Marcus was.....»»
New calcium material functions as an ammonia synthesis catalyst
Researchers find calcium outshines chromium in the catalytic production of ammonia. Working together, a humble trio of calcium atoms have defied expectations to break apart one of the strongest chemical bonds known. The atoms form the key part of a c.....»»
Telecommunications cable used to track sea ice extent in the Arctic
A telecommunications fiber optic cable deployed offshore of Oliktok Point, Alaska recorded ambient seismic noise that can be used to finely track the formation and retreat of sea ice in the area, researchers report in The Seismic Record......»»
US municipal bond market pricing may be biased by race, unphased by climate risk
New research suggests that the U.S. municipal bond market systemically misprices risk, as the pricing of municipal debt does not account for local physical climate risk, but does demand larger credit spreads from communities with a larger proportion.....»»
Physicists open new path to an exotic form of superconductivity
Physicists have identified a mechanism for the formation of oscillating superconductivity known as pair-density waves. Physical Review Letters published the discovery, which provides new insight into an unconventional, high-temperature superconductiv.....»»
Carbon Capture and Storage projects in Denmark at risk from bitumen formation
Carbon Capture and Storage (CCS) is increasingly being cited to help our global warming crisis by reducing greenhouse gas emissions through capturing carbon dioxide and storing deep underground. In the Danish North Sea, chalk rocks below the sea bed.....»»
Model with an extraordinary glass-forming ability expected to approach the ideal glass state, if it exists
Humans have been entranced by the unique beauty and physical properties of glass, producing jewelry, containers, and tools from the material for millennia. However, the physics underlying the phenomenon of glass formation remains surprisingly complex.....»»
The best movies on Amazon Prime Video (August 2023)
Revisit James Bond's greatest adventure in Skyfall, and Quentin Tarantino's Inglourious Basterds as they join the best movies on Amazon Prime Video......»»
"City killers" and half-giraffes: How many scary asteroids really go past Earth every year?
Asteroids are chunks of rock left over from the formation of our solar system. Approximately half a billion asteroids with sizes greater than four meters in diameter orbit the sun, traveling through our solar system at speeds up to about 30 kilometer.....»»
Team identifies gas streamers feeding triple baby stars
New observations and simulations of three spiral arms of gas feeding material to three protostars forming in a trinary system have clarified the formation of multi-star systems......»»
New exoplanet discovery builds better understanding of planet formation
An international team of scientists has discovered an unusual Jupiter-sized planet orbiting a low-mass star called TOI-4860, located in the Corvus constellation......»»
Ryugu samples reveal traces of rock from before the Sun existed
Small bits of material in the asteroid contain isotopes made in specific stars. Enlarge / Ryugu's rubble pile includes some small fragments left over from our Solar System's formation. (credit: ISAS, JAXA) When JAXA’s.....»»