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Category: chemistry

Phase-changing VO₂ turns methane into propane and hydrogen more efficiently

Converting methane, the primary component of natural gas, into higher alkanes and hydrogen, could be highly advantageous. Alkanes, such as propane and butane, are easier to transport than methane and are used in a wider range of industries. Hydrogen, on the other hand, is a promising clean fuel used to power electrochemical devices that can generate continuous power, known as fuel cells.

Over the past decades, some energy engineers have been exploring the possibility of converting methane into hydrogen or complex hydrocarbons using photocatalysts. These are materials activated by sunlight or other types of light and that can drive chemical reactions.

Researchers at Université de Lille—CNRS, Sorbonne Université and other institutes in France recently introduced a new strategy for the photocatalytic conversion of methane into propane, which is widely used for heating, cooking, and transportation.

Low-frequency wireless sensor tracks artery stiffening in real time with less interference

Wireless sensors used in wearable smart devices and medical equipment must be capable of detecting minute changes while maintaining high operational stability. However, existing technologies often utilize excessively high frequencies, leading to electromagnetic interference (EMI) or potential health risks to the human body. To address these fundamental issues, a Korean research team has developed a low-frequency-based wireless sensor technology.

A joint research team, led by Professor Seungyoung Ahn from the KAIST Cho Chun Shik Graduate School of Mobility and Professor Do Hwan Kim from the Department of Chemical Engineering at Hanyang University, has developed the “WiLECS” (Wireless Ionic-Electronic Coupling System), a low-frequency wireless electrochemical sensing platform that combines ion-based materials with wireless power transfer technology. The research is published in the journal Nature Communications.

Conventional wireless sensors suffer from low capacitance (the ability to store electrical charge), requiring high frequencies in the megahertz (MHz) range to compensate. However, these high-frequency methods can cause tissue heating or signal instability, limiting their practical application in clinical medical settings.

Math model reveals how life may have switched on from Earth’s primordial soup

Isolating the first spark of life on Earth is a matter of biology, geology, and chemistry—but it’s also an amazing math problem. At least, that’s how Varun Varanasi viewed it when he was a Yale undergraduate. The question, in a nutshell, is this: How did the primordial soup of interacting molecules on the Earth’s surface billions of years ago transform itself from complete chaos to an organized system of self-sustaining, reproducing chemicals? Did this occur gradually over millions of years, or was it abrupt?

Tiny crystal defects solve decades-old mystery in organic light emitters

Materials that emit and manipulate light are at the heart of technologies ranging from solar energy to advanced imaging systems. But even in well-studied materials, some fundamental behaviors remain unexplained. Researchers at Rice University have now solved a long-standing mystery in a widely used organic semiconductor, revealing how tiny structural imperfections can actually improve how these materials work.

In a study published in the Journal of the American Chemical Society, the team investigated 9,10-bis(phenylethynyl)anthracene (BPEA), a model system for studying how light energy moves through materials. For years, scientists have observed unusual optical behavior in BPEA, specifically two distinct absorption and emission signals that did not match existing theories.

“This was a long-standing puzzle in the field,” said Colette Sullivan, a doctoral student in Rice’s Department of Chemistry and co-author of the study. “Once we connected the experimental results with theory, it became clear the two signals were coming from completely different processes.”

A New Chapter in Chemistry? Scientists Uncover New Way Metals Bind Oxygen

Iron plays a central role in how the body uses oxygen. In hemoglobin, it binds dioxygen, a pair of oxygen atoms, allowing blood to carry oxygen to tissues. But this is only part of the story. Iron-oxo compounds, which contain iron bonded to oxygen in a highly reactive form, also drive critical chemistry in the liver, where enzymes rely on them to break down medications and toxins.

Rice University chemist Raúl Hernández Sánchez set out to explore whether oxygen could react with other metals, particularly those in the lowest region of the periodic table known as the f-block. This group includes lanthanides in the upper row and actinides below.

He proposed that if lanthanides could bond with oxygen, they might form reactive lanthanide-oxo compounds. These compounds could serve as synthetic alternatives to iron-oxo systems and give chemists new ways to study small-molecule reactions linked to biology.

Experimental Drug Can Reverse Osteoarthritis in Weeks, Animal Research Shows

The debilitating, chronic loss of joint cartilage known as osteoarthritis causes pain and bone decay for hundreds of millions of people every day, but new help may be on the way – in the form of a simple, single shot.

Based on ongoing animal experiments, injecting a carefully engineered, slow-release drug-delivery system into the damaged joint can coax the body’s own cartilage and bone cells to carry out an effective repair job in just a few weeks.

“In two years, we were able to go from a moonshot idea to developing these therapies to demonstrating that they reverse osteoarthritis in animals,” says chemical and biological engineer Stephanie Bryant, from the University of Colorado (UC) Boulder.

Striatal Dopamine Transporter and Rest Tremor in Parkinson DiseaseA Clinical Validation

【】 Full article: (Authored by Nader Butto, from Petah Tikva, Israel.)

This work presents a vortex-based geometric interpretation of atomic structure, in which electrons are described as localized vortex excitations embedded in a structured vacuum, offering a physically intuitive framework for understanding shells, subshells, orbitals, quantum numbers, and electron configurations without altering the formal structure of quantum mechanics. QUANTUM_NUMBERS vortex_geometry ElectronConfiguration.

1. Introduction

The atomic structure of matter represents one of the foundational achievements of modern physics and chemistry. Early experimental investigations by Rutherford established the nuclear model of the atom [1], while Bohr introduced the concept of discrete electronic energy levels to explain atomic spectra [2]. Sommerfeld subsequently extended this picture by incorporating angular momentum quantization and relativistic corrections [3]. These developments paved the way for the formulation of quantum mechanics, which replaced classical electron orbits with a wave-based description of electronic states.

The quantum-mechanical framework, formalized through the work of Schrödinger, Pauli, Born, and Dirac, provides a mathematically rigorous and highly successful description of atomic behavior [4]-[7]. Within this formalism, electrons are described by wavefunctions whose squared modulus gives the probability density of finding an electron in a given region of space. Atomic orbitals arise as solutions of the Schrödinger equation and are characterized by a set of quantum numbers that determine their energy, angular momentum, spatial orientation, and spin. This approach accurately predicts atomic spectra, selection rules, and chemical periodicity.

Hackers meet their match: New DNA encryption protects engineered cells from within

Engineered cells are a high-value genetic asset that is key to many fields, including biotechnology, medicine, aging, and stem cell research, with the global market projected to reach $8.0 trillion USD by 2035. Yet the only ways to keep the cells safe are strong locks and watchful guards.

In Science Advances, a team of U.S. researchers present a new approach to genetically securing precious biological material. They created a genetic combination lock in which the locking or encryption process scrambled the DNA of a cell so that its important instructions were non-functional and couldn’t be easily read or used.

The unlocking, or decryption, process involves adding a series of chemicals in a precise order over time—like entering a password—to activate recombinases, which then unscramble the DNA to their original, functional form.

Chang’e mission samples reveal how exogenous organic matter evolves on the moon

Elements essential to life, such as carbon, nitrogen, oxygen, phosphorus, and sulfur, were “delivered” to Earth and the moon during the early stages of the solar system via asteroids and comets impacting their surfaces. These exogenous materials may have provided the chemical building blocks necessary for the origin and early evolution of life on Earth. But extensive geological activity and biological processes on Earth have largely erased the direct records of these early inputs on our planet.

In contrast, the moon, with its relatively limited geological activity, serves as a natural “time capsule,” making it easier to unravel the history and evolution of extraterrestrial organic matter.

A recent study has, for the first time, systematically identified multiple nitrogen-bearing organic species on the surfaces of lunar soil grains returned by China’s Chang’e-5 and Chang’e-6 missions. The research further reveals an evolutionary pathway defined by exogenous delivery, impact modification, and continuous solar wind processing.

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