Rabi oscillations in a stretching molecule
Over eighty years ago, Rabi oscillations were proposed to describe the strong coupling and population transfer in a two-level quantum system exposed to an oscillatory driving field. As compared to atoms, molecules have an extra degree of vibration, w.....»»
Chip-scale spectrometry using a photonic molecule
Chip-scale miniaturization of spectrometers allows rapid detection of spectral information in portable devices, opening up new applications. However, integrated spectrometers typically suffer from a trade-off between spectral resolution and optical b.....»»
Elegantly modeling Earth"s abrupt glacial transitions
Proxy data—indirect records of the Earth's climate found in unlikely places like coral, pollen, trees and sediments—show interesting oscillations approximately every 100,000 years starting about one million years ago. Strong changes in global ice.....»»
Light-to-energy conversion in many aquatic microbes more complex than was previously known, researchers discover
Plants convert light into a form of energy that they can use—a molecule called adenosine triphosphate (ATP)—through photosynthesis. This is a complex process that also produces sugar, which the plant can use for energy later, and oxygen. Some bac.....»»
Detecting molecular vibration information faster and better by "stretching" time
Infrared spectroscopy is a noninvasive tool used to identify unknown samples and known chemical substances. It is based on how different molecules interact with infrared light. You may have seen this tool at airports, where they screen for illicit dr.....»»
How does RNA know where to go in the city of the cell? Using cellular ZIP codes and postal carrier routes
Before 2020, when my friends and acquaintances asked me what I study as a molecular biologist, their eyes would inevitably glaze over as soon as I said "RNA." Now, as the COVID-19 pandemic has shown the power and promise of this molecule to the world.....»»
P. aeruginosa bacteria produce a molecule that paralyzes immune system cells
Researchers from Freiburg and Strasbourg have discovered a strong immunological effect of the molecule LecB—and a way to prevent it......»»
Researchers develop small molecule to stimulate natural killer cells against neuroblastoma
An MUSC Hollings Cancer Center research team has created what team members believe to be among the first small molecules designed to stimulate immune cells to fight cancer. More importantly, these compounds inhibit a specific enzyme that hasn't been.....»»
Cells avoid multitasking: Examining the cause of metabolic oscillations that lead up to cell division
Textbooks will tell you that in dividing cells, the production of new DNA peaks during the S-phase, while production of other macromolecules, such as proteins, lipids, and polysaccharides, continues at more or less the same level......»»
A new 3D-printed molecular model to teach students about nucleobase pairing
Molecular models are a tried-and-tested tool for teaching chemistry to students of all ages. By enabling users to visualize the three-dimensional structure of a molecule and how its atoms are arranged, they can accelerate the learning process for ess.....»»
Nanosatellite shows the way to RNA medicine of the future
The RNA molecule is commonly recognized as messenger between DNA and protein, but it can also be folded into intricate molecular machines. An example of a naturally occurring RNA machine is the ribosome, that functions as a protein factory in all cel.....»»
PanGu drug model: Learn a molecule like a human
A recent study published in the journal Science China Life Sciences was led by Dr. Nan Qiao (Laboratory of Health Intelligence, Huawei Cloud Computing Technologies), Dr. Hualiang Jiang (Shanghai Institute of Materia Medica, Chinese Academy of Science.....»»
Scientists discover new form of oscillations in single filament driven by two-sided-loop jet
Researchers led by Prof. Shen Yuandeng and his student Tan Song from the Yunnan Observatories of the Chinese Academy of Sciences (CAS) have discovered new form of oscillation in a single filament driven by a two-sided-loop jet......»»
How lake ice formation influences transformation of dissolved organic matter
Dissolved organic matter (DOM) is the main form and active component of natural organic matter in lakes. Microbial- and photo-degradation of DOM can release large amounts of small molecule organic acids and biogenic substances......»»
Nanofluidic devices offer solutions for studying single molecule chemical reactions
In a chemical reaction, molecules in different substances meet one another to form new molecules causing changes in the bonds of their atoms. The molecules collide at an extremely close distance—a nanometer or less—in an extremely short amount of.....»»
Quasi-periodic oscillations detected in a long-period eclipsing dwarf nova
Using NASA's Transiting Exoplanet Survey Satellite (TESS), Chinese astronomers have detected quasi-periodic oscillations (QPOs) in the light curve of HS 2325+8205—a long-period eclipsing dwarf nova. The discovery was detailed in the January 2023 is.....»»
A special carbon molecule can function as multiple high-speed switches at once
For the first time, an international team of researchers, including those from the University of Tokyo's Institute for Solid State Physics, has demonstrated a switch, analogous to a transistor, made from a single molecule called fullerene......»»
Studying epigenetic regulation at the single-molecule level
If one imagines the genome as an instruction manual for the functioning of a cell, every page of this manual is covered with annotations, highlights, and bookmarks. The role of some of these marks remains mysterious—do they actively direct the read.....»»
Researchers develop light-controlled drugs for future precision therapies against diseases such as cancer
Researchers from the Institute for Advanced Chemistry of Catalonia (IQAC) of Spanish National Research Council (CSIC) have developed a series of photosensitive molecule drugs that can be reversibly activated by external light, thus achieving a much m.....»»
Stretching-insensitive stretchable and biocompatible triboelectric nanogenerators
Professor Juhyuk Lee of the Department of Energy Engineering has developed an elastic triboelectric generator that can be used in the daily lives of frequent movers. The cause of the output reduction of the elastic triboelectric sensor was identified.....»»
A possible strategy for a tabletop chiral attosecond laser
When molecules form from many atoms, the atoms can combine in different ways. Two forms of the same molecule can have the same composition but have different arrangements of atoms, giving rise to isomers. Some isomers may have structures that are mir.....»»