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Archive for the ‘chemistry’ category: Page 151

Dec 21, 2021

A Mining Company Is Using Hydrogen Power in Its Trucks, Cutting CO2 Emissions

Posted by in categories: chemistry, energy, engineering, sustainability, transportation

And it’s a hybrid mix of hydrogen and electric power.

Global mining company Anglo American is experimenting with hydrogen to power the giant mining trucks.

Mining trucks consume 35.3 gallons (134 liters) of diesel per hour with their enormous weight of around 220 metric tonnes and therefore emitting vast amounts of carbon dioxide into the atmosphere.

Continue reading “A Mining Company Is Using Hydrogen Power in Its Trucks, Cutting CO2 Emissions” »

Dec 21, 2021

James Webb Space Telescope: The $10B Successor of the Hubble

Posted by in categories: chemistry, evolution, space

It makes space travel look cheap.

Humans have been looking at the stars for millenia, but it was just over 30 years ago that the Hubble Space Telescope launched, and we started getting a really good look at what’s out there. Hubble was beset with more than a decade of setbacks before its launch in 1990. Then, just after taking its position orbiting Earth, astronomers realized that something wasn’t right. It took engineers another three years to fix a manufacturing error that had left one of the mirrors misshapen by one-millionth of a meter. Ultimately, that imperfection was enough to render the telescope’s mirrors effectively useless. The long wait was worth it, though. The Hubble enabled dozens of breakthroughs in astronomy. It also took beautiful pictures. A recent version of its famous “Hubble Deep Field” image includes galaxies that are 13 billion lightyears away, making them the farthest objects ever photographed.

NASA is scheduled to soon launch what it calls the “successor” to Hubble: the James Webb Space Telescope. Like the Hubble, the Webb telescope is also designed to take extraordinarily precise measurements of “Ultraviolet and visible light emitted by the very first luminous objects [and which] has been stretched or ‘redshifted’ by the universe’s continual expansion and arrives today as infrared light.” Webb will also study objects closer to home, such as planets and other bodies in our solar system with the aim of determining more about their origin and evolution. Webb will also observe exoplanets located in their stars’ habitable zones, to search for signatures of habitability, and to learn about their chemical compositions.

Dec 20, 2021

Scientists create mind-blowing tool to ‘see’ millions of brain cell connections in mice

Posted by in categories: biotech/medical, chemistry, neuroscience

To solve the mysteries of how learning and memory occur, Johns Hopkins Medicine scientists have created a system to track millions of connections among brain cells in mice—all at the same time—when the animals’ whiskers are tweaked, an indicator for learning.

Researchers say the new tool gives an unprecedented view of brain cell activity in a synapse—a tiny space between two , where molecules and chemicals are passed back and forth.

Continue reading “Scientists create mind-blowing tool to ‘see’ millions of brain cell connections in mice” »

Dec 20, 2021

Where does consciousness come from? And how do our brains create it? A look at one of life’s biggest mysteries

Posted by in categories: biological, chemistry, neuroscience

General anesthesia doesn’t just work on your brain or on your mind. It works on your consciousness. By altering the delicate electrochemical balance within the neural circuitry inside your head, the basic ground state of what it is to “be” is — temporarily — abolished. In this process lies one of the greatest remaining mysteries in science, and in philosophy too.

Somehow, within each of our brains, the combined activity of billions of neurons, each one a tiny biological machine, is giving rise to a conscious experience. And not just any conscious experience, your conscious experience, right here, right now.

Dec 19, 2021

Researchers enable nanoscale metal parts using new 3D printing technology

Posted by in categories: 3D printing, chemistry, nanotechnology, sustainability

Researchers from ETH Zurich and Nanyang Technological University (NTU) have developed a new 3D printing technique capable of producing nanoscale metal parts.

Based on an electrochemical approach, the process can be used to fabricate copper objects as small as 25 nanometers in diameter. For reference, an average human hair is around 3000x thicker at 75 microns.

According to the research team led by Dr Dmitry Momotenko, the new 3D printing technique has potential applications in microelectronics, sensor technology, and battery technology.

Dec 19, 2021

Quantum effects make magnetene surprisingly slippery

Posted by in categories: chemistry, quantum physics

The ultra-slippery nature of a two-dimensional material called magnetene could be down to quantum effects rather than the mechanics of physical layers sliding across each other, say researchers at the University of Toronto in Canada and Rice University in the US. The result sheds light on the physics of friction at the microscopic scale and could aid the development of reduced-friction lubricants for tiny, implantable devices.

Two-dimensional materials are usually obtained by shaving atomically thin slices from a sample of the bulk material. In graphene, a 2D form of carbon that was the first material to be isolated using this method, the friction between adjacent layers is very low because they are bound together by weak van der Waals forces, and therefore slide past each other like playing cards fanning out in a deck. For magnetene, the bulk material is magnetite, a form of iron oxide with the chemical formula Fe3O4that exists as a 3D lattice in the natural ore. The bonds between layers are much stronger in magnetene than in graphene, however, so its similarly low-friction nature was a bit of a mystery.

Dec 17, 2021

Russia’s Clandestine Chemical Weapons Programme and the GRU’s Unit 29155

Posted by in categories: biotech/medical, chemistry, military

On October 15, 2020, the European Union imposed sanctions on six senior Russian officials and a leading Russian research institute over the alleged use of a nerve agent from the Novichok family in the poisoning of opposition leader Alexey Navalny. Russia dismissed as baseless the EU’s allegations that it had not complied with its obligations, under the convention it ratified in 1997, to discontinue its chemical weapons program. Russian officials said the country had nothing to do with Navalny’s poisoning and implied that if any party had used nerve agents on him, it would have been Western secret services. Vladimir Putin, who in 2017 had personally watched over the destruction of the last remaining Russian chemical weapons stash, ridiculed the findings of four separate laboratories, confirmed by the OPCW, that a Novichok-type organophosphate poison was identified in Alexey Navalny’s blood.

Two years earlier, in 2018, Russia had dismissed as unfounded allegations that its military intelligence had used Novichok to poison former Russian spy Sergei Skripal and his daughter. Similarly, Russia had then stated that it had no ongoing chemical weapons program and had destroyed all of its prior arsenals; while alluding that UK agencies may have used their own stash of Novichok to poison the Skripals in a false-flag operation.

Continue reading “Russia’s Clandestine Chemical Weapons Programme and the GRU’s Unit 29155” »

Dec 17, 2021

Do we have free will?

Posted by in categories: chemistry, neuroscience

Is free will a phantom of brain chemistry, or are we truly in control of our lives? A question debated by great minds for millenia.

Dec 16, 2021

An Energy Storage Solution That Flows Like Soft-Serve Ice Cream

Posted by in categories: chemistry, solar power, sustainability

Researchers make the case for a semisolid electrochemical compound as a cost-efficient, grid-scale battery backup for wind and solar power.

Dec 16, 2021

Roche, Genentech, Recursion Launch Up-to-$12B AI Drug Discovery Effort

Posted by in categories: biotech/medical, chemistry, genetics, neuroscience, robotics/AI

Roche and its Genentech subsidiary have committed up to $12 billion to Recursion in return for using its Recursion Operating System (OS) to advance therapies in 40 programs that include “key areas” of neuroscience and an undisclosed oncology indication.

Recursion OS applies machine learning and high-content screening methods in what the companies said would be a “transformational” model for tech-enabled target and drug discovery.

The integrated, multi-faceted OS is designed to generate, analyze and glean insights from large-scale proprietary biological and chemical datasets—in this case, extensive single-cell perturbation screening data from Roche and Genentech—by integrating wet-lab and dry-lab biology at scale to phenomically capture chemical and genetic alterations in neuroscience-related cell types and select cancer cell lines.