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Categories: Chemistry: General, Space: General

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Chemistry: General Engineering: Graphene Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Sensors made from 'frozen smoke' can detect toxic formaldehyde in homes and offices      (via sciencedaily.com)     Original source 

Researchers have developed a sensor made from 'frozen smoke' that uses artificial intelligence techniques to detect formaldehyde in real time at concentrations as low as eight parts per billion, far beyond the sensitivity of most indoor air quality sensors.

Chemistry: General Energy: Technology Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Conversion process turns greenhouse gas into ethylene      (via sciencedaily.com)     Original source 

Engineers have created a more efficient way of converting carbon dioxide into valuable products while simultaneously addressing climate change.

Chemistry: General Chemistry: Inorganic Chemistry Chemistry: Organic Chemistry Energy: Alternative Fuels Energy: Technology Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Towards A Better Way of Releasing Hydrogen Stored in Hydrogen Boride Sheets      (via sciencedaily.com)     Original source 

Hydrogen stored in hydrogen boride sheets can be efficiently released electrochemically, report scientists. Through a series of experiments, they demonstrated that dispersing these sheets in an organic solvent and applying a small voltage is enough to release all the stored hydrogen efficiently. These findings suggest hydrogen boride sheets could soon become a safe and convenient way to store and transport hydrogen, which is a cleaner and more sustainable fuel.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Physics: General Physics: Optics
Published

Molecular manganese complex as superphotooxidant      (via sciencedaily.com)     Original source 

Highly reducing or oxidizing photocatalysts are a fundamental challenge in photochemistry. Only a few transition metal complexes with Earth-abundant metal ions have so far advanced to excited state oxidants, including chromium, iron, and cobalt. All these photocatalysts require high energy light for excitation and their oxidizing power has not yet been fully exploited. Furthermore, precious and hence expensive metals are the decisive ingredients in most cases. A team of researchers has now developed a new molecular system based on the element manganese. Manganese, as opposed to precious metals, is the third most abundant metal after iron and titanium and hence widely available and very cheap.

Offbeat: General Offbeat: Space Space: Astronomy Space: Exploration Space: General Space: Structures and Features
Published

Mysterious gap in size distribution of super-earths explained      (via sciencedaily.com)     Original source 

Astronomers have uncovered evidence of how the enigmatic gap in the size distribution of exoplanets at around two Earth radii emerges. Their computer simulations demonstrate that the migration of icy, so-called sub-Neptunes into the inner regions of their planetary systems could account for this phenomenon. As they draw closer to the central star, evaporating water ice forms an atmosphere that makes the planets appear larger than in their frozen state. Simultaneously, smaller rocky planets gradually lose a portion of their original gaseous envelope, causing their measured radius to shrink over time.

Chemistry: General Chemistry: Inorganic Chemistry Physics: General
Published

New process allows full recovery of starting materials from tough polymer composites      (via sciencedaily.com)     Original source 

In a win for chemistry, inventors have designed a closed-loop path for synthesizing an exceptionally tough carbon-fiber-reinforced polymer and later recovering all of its starting materials.

Chemistry: General Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Researchers unveil method to detect 'forever chemicals' in under 3 minutes      (via sciencedaily.com)     Original source 

PFAS have earned the name 'forever chemicals' with good reason -- the human-made compounds, which can take thousands of years to degrade and are found in everything from grease-resistant food packaging to water-repellent clothing, have made their way into nearly half the U.S. tap water supply.

Chemistry: Inorganic Chemistry Chemistry: Thermodynamics Physics: General Physics: Quantum Physics Space: Astrophysics Space: General
Published

Physicists capture the first sounds of heat 'sloshing' in a superfluid      (via sciencedaily.com)     Original source 

For the first time, physicists have captured direct images of 'second sound,' the movement of heat sloshing back and forth within a superfluid. The results will expand scientists' understanding of heat flow in superconductors and neutron stars.

Chemistry: Biochemistry Chemistry: General
Published

Nanofiber bandages fight infection, speed healing      (via sciencedaily.com)     Original source 

Researchers have identified a new way to harness the antioxidant and antibacterial properties of a botanical compound to make nanofiber-coated cotton bandages that fight infection and help wounds heal more quickly.

Biology: Microbiology Chemistry: General Chemistry: Inorganic Chemistry Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
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Scientists develop artificial 'worm gut' to break down plastics      (via sciencedaily.com)     Original source 

A team of scientists has developed an artificial 'worm gut' to break down plastics, offering hope for a nature-inspired method to tackle the global plastic pollution problem.

Offbeat: General Offbeat: Space Space: Astronomy Space: Exploration Space: General Space: The Solar System
Published

Mimas' surprise: Tiny moon of Saturn holds young ocean beneath icy shell      (via sciencedaily.com)     Original source 

Saturn's moon Mimas harbors a global ocean beneath its icy shell, discovered through analysis of its orbit by Cassini spacecraft data. This ocean formed just 5-15 million years ago, making Mimas a prime candidate for studying early ocean formation and potential for life. This discovery suggests life-essential conditions might exist on seemingly inactive moons, expanding our search for life beyond Earth.

Offbeat: General Offbeat: Space Space: Astrophysics Space: Exploration Space: General
Published

Astrophysicists crack the case of 'disappearing' Sulphur in planetary nebulae      (via sciencedaily.com)     Original source 

Two astrophysicists have finally solved a 20-year-old astrophysical puzzle concerning the lower-than-expected amounts of the element sulphur found in Planetary Nebulae (PNe) in comparison to expectations and measurements of other elements and other types of astrophysical objects. The expected levels of sulphur have long appeared to be 'missing in action'. However, they have now finally reported for duty after hiding in plain sight, as a result of leveraging highly accurate and reliable data.

Biology: Botany Biology: Cell Biology Chemistry: General Energy: Fossil Fuels Environmental: General Environmental: Water Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Inexpensive, carbon-neutral biofuels are finally possible      (via sciencedaily.com)     Original source 

When it comes to making fuel from plants, the first step has always been the hardest -- breaking down the plant matter. A new study finds that introducing a simple, renewable chemical to the pretreatment step can finally make next-generation biofuel production both cost-effective and carbon neutral.

Chemistry: General Engineering: Robotics Research Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

3D printed nanocellulose upscaled for green architectural applications      (via sciencedaily.com)     Original source 

For the first time, a hydrogel material made of nanocellulose and algae has been tested as an alternative, greener architectural material. The study shows how the abundant sustainable material can be 3D printed into a wide array of architectural components, using much less energy than conventional construction methods.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Chemistry: Organic Chemistry
Published

BESSY II: Molecular orbitals determine stability      (via sciencedaily.com)     Original source 

Carboxylic acid dianions (fumarate, maleate and succinate) play a role in coordination chemistry and to some extent also in the biochemistry of body cells. A team has now analyzed their electronic structures using RIXS in combination with DFT simulations. The results provide information not only on electronic structures but also on the relative stability of these molecules which can influence an industry's choice of carboxylate dianions, optimizing both the stability and geometry of coordination polymers.

Chemistry: General Chemistry: Inorganic Chemistry Engineering: Nanotechnology Environmental: General Geoscience: Environmental Issues Geoscience: Geochemistry
Published

Researchers reveal elusive bottleneck holding back global effort to convert carbon dioxide waste into usable products      (via sciencedaily.com)     Original source 

Think of it as recycling on the nanoscale: a tantalizing electrochemical process that can harvest carbon before it becomes air pollution and restructure it into the components of everyday products. The drive to capture airborne carbon dioxide from industrial waste and make it into fuel and plastics is gaining momentum after a team of researchers uncovered precisely how the process works and where it bogs down.

Space: Astronomy Space: Astrophysics Space: Cosmology Space: Exploration Space: General Space: Structures and Features
Published

A long, long time ago in a galaxy not so far away      (via sciencedaily.com)     Original source 

Employing massive data sets collected through NASA's James Webb Space Telescope, astronomers are unearthing clues to conditions existing in the early universe. The team has catalogued the ages of stars in the Wolf--Lundmark--Melotte (WLM) galaxy, constructing the most detailed picture of it yet, according to the researchers. WLM, a neighbor of the Milky Way, is an active center of star formation that includes ancient stars formed 13 billion years ago.

Chemistry: Biochemistry Chemistry: General Chemistry: Inorganic Chemistry Engineering: Nanotechnology Physics: General Physics: Quantum Computing Physics: Quantum Physics
Published

Structural isomerization of individual molecules using a scanning tunneling microscope probe      (via sciencedaily.com)     Original source 

An international research team has succeeded in controlling the chirality of individual molecules through structural isomerization. The team also succeeded in synthesizing highly reactive diradicals with two unpaired electrons. These achievements were made using a scanning tunneling microscope probe at low temperatures.