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Consumer Reports looks at braiding hair and dangerous chemicals
2+ week, 7+ hour ago (57+ words) Add Yahoo as a preferred source to see more of our stories on Google. When Consumer Reports first tested synthetic braiding hair last year, scientists found potentially dangerous heavy metals and ... When Consumer Reports first tested synthetic braiding hair last…...
Formaldehyde hydrazone as a methyl reagent for nickel-catalyzed cross-coupling methylation of aryl and heteroaryl electrophiles
3+ day, 2+ hour ago (328+ words) Electron donor-acceptor (EDA) acceptor catalysis remains significantly less developed than donor catalysis. Herein, a hydrogen-bond-mediated EDA acceptor catalysis using readily available 4,4'-di-tert-butyl-2,2'-bipyridine (dtbbpy) or 4-tert-butylpyridine as the acceptor catalyst is developed, enabling the hydrosulfonylation of unactivated olefins and sulfonyl…...
Machine-learning-aided discovery of methanol-to-olefins zeolite catalysts with ultra-high initial selectivity
3+ week, 4+ day ago (147+ words) An MTO zeolite catalyst with an ultra-high initial selectivity has been discovered at a low trial-and-error cost through a machine learning (ML)-aidedworkflow. Its etheneselectivity unexpectedly exceeds 60%, presenting thehighest reported value in the field of MTO catalysis. image:An MTO zeolite…...
C3 Releases Reduced Chemical Mechanisms for Computational Fluid Dynamics Simulations of Alternative Fuels
11+ hour, 32+ min ago (686+ words) C3MechLite contains 61 species and 519 reactions. The reduced mechanism can predict the combustion characteristics of hydrogen, carbon monoxide, ammonia, methane, natural gas, nitrogen oxides, and their mixtures for a wide range of conditions. C3MechCore contains 118 species and 1,006 reactions. This mechanism includes all of…...
On-surface synthesis
3+ mon, 2+ week ago (509+ words) Collection" 16 December 2024 This Collection aims to bring together the latest progress in the synthesis, characterization, and functionalization of covalently bonded nanomaterials fabricated by the on-surface synthesis approach, as well as highlighting advances in the synthesis of coordination polymers, macrocycles and…...
New supercool alloy could take the heat off helium-3
21+ min ago (549+ words) The heated race to achieve the extreme cold that quantum technologies demand may have a frontrunner. Chinese scientists have developed an alloy that almost reaches absolute zero, the coldest possible temperature, without using the scarce isotope, helium-3. Other examples include…...
Scientists unveil new ion membrane that reduces salt in water by 50%
5+ hour, 28+ min ago (506+ words) The system uses ultra-thin metal layers to control ion flow in water. Scientists have designed a revolutionary solution that could reshape desalination and water purification after making a membrane that can transport ions through water without relying on mechanical systems…...
Rocket testing plan near Edwards Aquifer alarms San Marcos water advocates
5+ day, 5+ hour ago (56+ words) Water advocates warn that X-Bow System's solid rocket motor tests at Freeman Ranch could threaten to pollute the Edwards Aquifer and asks for plans to be halted ... Water advocates warn that X-Bow System's solid rocket motor tests at Freeman Ranch…...
The Particle That Walks Through Walls — And Why Your Phone Depends On It
5+ hour, 24+ min ago (167+ words) "The wave function approaching the barrier." I built a simulation I wanted to understand this more concretely. So I solved the time-dependent Schr'dinger equation numerically " the equation that describes how wave functions evolve " and built an interactive simulation. You fire…...
Breakup of a single chemical bond measured
1+ mon, 1+ day ago (334+ words) "It's an incredible image -- being able to actually see a single small molecule on a surface with another one bonded to it is amazing," said coauthor Craig Arnold, the Susan Dod Brown Professor of Mechanical and Aerospace Engineering and director…...