Results 81 - 100 of 3173.

Life Sciences - Chemistry - 18.01.2023
From molecules to organisms
From molecules to organisms
How did life on Earth first emerge? And how was it able to prosper and evolve? researchers are involved in the quest to find answers to these fundamental questions. Since time immemorial, humanity has pondered the question of how life on Earth first began. Ancient cultures declared the creation of the world and the origin of life to be the work of gods and other divine beings.

Chemistry - Physics - 18.01.2023
New ’chain mail’ material is tough and flexible
The individual building blocks of a catenane are polyhedral molecules - a type of adamantane - that link arms to form a 2D mesh or 3D network that is sturdy but flexible. University of California, Berkeley, chemists have created a new type of material from millions of identical, interlocking molecules that for the first time allows the synthesis of extensive 2D or 3D structures that are flexible, strong and resilient, like the chain mail that protected medieval knights.

Chemistry - Materials Science - 17.01.2023
Improving perovskite solar cell resistance to degradation
Improving perovskite solar cell resistance to degradation
Despite their huge potential, the way perovskite solar cells respond to external stimuli - such as heat or moisture - has a considerable impact on their stability. Researchers at EPFL have identified the cause of degradation and developed a technique to improve stability, bringing us closer to widespread adoption of these cost-effective and efficient solar cells.

Physics - Chemistry - 17.01.2023
Do Electrons Spin?
Deep inside all matter in the universe, electrons are buzzing around and behaving as if they are twirling around on their axes like spinning tops. These "spinning" electrons are fundamental to quantum physics and play a central role in our understanding of atoms and molecules. Other subatomic particles spin, too, and the study of spin has technical applications in the fields of chemistry, physics, medicine, and computer electronics.

Physics - Chemistry - 16.01.2023
Experimental physicists take step toward understanding natural quantum systems
Experimental physicists take step toward understanding natural quantum systems
"Suppose you knew everything there was to know about a water molecule - the chemical formula, the bond angle, etc.," says experimental physicist  Joseph Thywissen . "You might know everything about the molecule, but still not know there are waves on the ocean - much less how to surf them," he says.

Life Sciences - Chemistry - 13.01.2023
Surprising protein behavior could improve understanding of aging
Surprising protein behavior could improve understanding of aging
Surprising protein behavior could improve our understanding of aging E. coli proteins lacking the ability to reassemble themselves could one day help scientists rethink studies of the human brain Researchers have discovered a surprising anomaly in the behavior of how proteins form, upending long-held assumptions about the way cells produce these crucial molecules and potentially leading to a better understanding of aging and neurodegenerative diseases in humans.

Chemistry - Physics - 11.01.2023
A big step toward ’green’ ammonia and a ’greener’ fertilizer
A chemical plant that produces ammonia, most of which goes into making fertilizer. Industrial production of ammonia, primarily for synthetic fertilizer - the fuel for last century's Green Revolution - is one of the world's largest chemical markets, but also one of the most energy intensive. Globally, the Haber-Bosch process for making ammonia uses about 1% of all fossil fuels and produces 1% of all carbon dioxide emissions, making it a major contributor to climate change.

Materials Science - Chemistry - 10.01.2023
Customized Electrolyte Additives Boost Battery Cell Performance
Phosphazene-Based Electrolyte Additives Stabilize Silicon-Based Lithium-Ion Batteries Silicon (Si) is considered a promising anode material in next-generation lithium-ion batteries (LIB). Its practical application has so far been hindered by challenges such as capacity losses during battery operation.

Computer Science - Chemistry - 08.01.2023
Unpacking the 'black box' to build better AI models
Unpacking the ’black box’ to build better AI models
Stefanie Jegelka seeks to understand how machine-learning models behave, to help researchers build more robust models for applications in biology, computer vision, optimization, and more. When deep learning models are deployed in the real world, perhaps to detect financial fraud from credit card activity or identify cancer in medical images, they are often able to outperform humans.

Life Sciences - Chemistry - 05.01.2023
Formation of pores in mitochondrial membrane elucidated
Formation of pores in mitochondrial membrane elucidated
Study by a team of researchers from Freiburg and Kyoto investigates formation of beta-barrel membrane proteins that make up the pores Mitochondria are considered to be the power plants of cells and are essential for human metabolism. Dysfunction in 40 percent of mitochondrial proteins are associated with human diseases, which is why mitochondria also play an important role in medical research.

Chemistry - Physics - 04.01.2023
A step towards solar fuels out of thin air
A step towards solar fuels out of thin air
EPFL chemical engineers have invented a solar-powered artificial leaf, built on a novel electrode which is transparent and porous, capable of harvesting water from the air for conversion into hydrogen fuel. The semiconductor-based technology is scalable and easy to prepare. A device that can harvest water from the air and provide hydrogen fuel-entirely powered by solar energy-has been a dream for researchers for decades.

Physics - Chemistry - 04.01.2023
Cheap, sustainable hydrogen through solar power
Withstanding high temperatures and the light of 160 suns, a new catalyst is 10 times more efficient than previous sun-powered water-splitting devices of its kind Study: Solar-to-hydrogen efficiency of >9% in photocatalytic water splitting (DOI: 10.1038/s41586'022 -05399-1) A new kind of solar panel, developed at the University of Michigan, has achieved 9% efficiency in converting water into hydrogen and oxygen-mimicking a crucial step in natural photosynthesis.

Chemistry - Computer Science - 03.01.2023
Entire colour palette of inexpensive fluorescent dyes
Entire colour palette of inexpensive fluorescent dyes
Researchers have developed a modular system for the simple and inexpensive production of security inks. It is based on polymers and could also be used in solar power plants and screens in the future. Novel fluorescent dyes developed by researchers are relatively simple and inexpensive to produce. The dyes are polymers with a modular structure.

Environment - Chemistry - 29.12.2022
Old Christmas trees could be saved from landfill to make renewable fuels
Seven million Christmas trees end up in landfill in the UK each year, releasing an estimated 100,000 tonnes of harmful greenhouse gases into the atmosphere New research has found a more efficient, simplified process for using pine needles to produce formic acid, for use in hydrogen fuel cells, as a food preservative and in agricultural and industrial manufacturing Pine needles collected after Christmas and processed in this way could be used to

Physics - Chemistry - 21.12.2022
Why some wet surfaces are less slippery
Why some wet surfaces are less slippery
Many surfaces get slippery when wet. Some surfaces have the opposite behaviour: they get less slippery. UvA researchers have now shed light on why this is the case. Hydrogen bonds between the surface and the water turn out to play an important role. The research, carried out by PhD candidate Liang Peng in collaboration with five physicists and chemists from UvA, ARCNL and the German Max Planck Institute for Polymer Research, was published in Physical Review Letters this week.

Chemistry - Environment - 21.12.2022
A process to produce fuel from banana peel
A process to produce fuel from banana peel
This green process could be used to valorize other food remains rich in cellulose or lignin The banana is an excellent source of energy, nutritionists will tell you unanimously. So is the peel, according to Marie-Josée Dumont, but in the fuel sense of the term. The professor from the Department of Chemical Engineering at Laval University and her colleagues at McGill University have just taken a new step towards a fuel based on banana peel by substantially improving the efficiency of an existing chemical process.

Chemistry - Life Sciences - 21.12.2022
'A lot of work was invested before I was able to control these reactions'
’A lot of work was invested before I was able to control these reactions’
Dr Charlotte Teschers has developed an automated method for producing -glycomimetics- One project, one researcher and five years of intensive work: as part of her doctoral thesis, supervised by Prof. Ryan Gilmour at the Institute of Organic Chemistry, Dr. Charlotte Teschers has successfully developed a new method of producing complex, fluorinated sugars.

Chemistry - Physics - 20.12.2022
What is the best recipe for making soap bubbles?
What is the best recipe for making soap bubbles?
A soap bubble attracts the attention of young and old. Who has never wondered the recipe of these fascinating bubbles or how to get the biggest one - In collaboration with artists, who have a great empirical knowledge of the recipes that work in their acts, a team from the Laboratory of Solid State Physics (CNRS/University of Paris-Saclay) has identified the main ingredients ensuring to get the best bubbles.

Chemistry - 19.12.2022
Gaining unprecedented view of small molecules by machine learning
A new tool to identify small molecules offers benefits for diagnostics, drug discovery and fundamental research. A new machine learning model will help scientists identify small molecules, with applications in medicine, drug discovery and environmental chemistry. Developed by researchers at Aalto University and the University of Luxembourg , the model was trained with data from dozens of laboratories to become one of the most accurate tools for identifying small molecules.

Physics - Chemistry - 19.12.2022
Tool to improve research on molecular nanomagnets
Tool to improve research on molecular nanomagnets
The University of Valencia develops a tool to improve research on molecular nanomagnets A team from the Institute of Molecular Science (ICMol) of the University of Valencia has developed an open interactive platform that brings together and makes available to science around 20,000 data relating to the chemical design of molecular nanomagnets of special interest in the field of magnetic memories.