A young Chinese man diagnosed with Alzheimer’s at the age of 19 is demanding that the early causes of the disease be investigated.
Category: biotech/medical – Page 137
Maximum lifespan and brain size in mammals are associated with gene family size expansion related to immune system functions
Kilili, H., Padilla-Morales, B., Castillo-Morales, A. et al. Sci Rep 15, 15,087 (2025). https://doi.org/10.1038/s41598-025-98786-3
These DNA-sized nanobots are made for walking and sorting molecular cargo
The field of nanotechnology is still in its nascent stages, but recent innovations are increasingly making this science fiction world of tiny robots into a reality. New breakthrough research from a team at Caltech has demonstrated the ability of a robot made of a single strand of DNA to explore a molecular surface, pick up targeted molecules, and move them to another designated location.
“Just like electromechanical robots are sent off to faraway places, like Mars, we would like to send molecular robots to minuscule places where humans can’t go, such as the bloodstream,” says Lulu Qian, co-author on the paper. “Our goal was to design and build a molecular robot that could perform a sophisticated nanomechanical task: cargo sorting.”
Previous work by a variety of researchers has successfully demonstrated the creation of such DNA robots, but this is the first time they have been shown to pick up and transport specific molecules.
Oxygen-stable biocatalyst from a thermophilic bacterium could boost hydrogen production
In the absence of air, microorganisms produce hydrogen using an enzyme called [FeFe]-hydrogenase, one of the most efficient hydrogen-producing biocatalysts known and a promising tool for green hydrogen energy. However, these enzymes are rapidly destroyed when exposed to air, which has so far limited their industrial use.
Now, joint efforts led by scientists from the Photobiotechnology group and the Center for Theoretical Chemistry at Ruhr University Bochum, Germany, have isolated a new type of oxygen-stable [FeFe]-hydrogenase and revealed its “tricks” for this oxygen-stability.
The results are published in the Journal of the American Chemical Society.
Room-temperature mid-infrared photodetector promises advances in environmental and medical monitoring
NASA’s James Webb Space Telescope (JWST) utilizes mid-infrared spectroscopy to precisely analyze molecular components such as water vapor and sulfur dioxide in exoplanet atmospheres. The key to this analysis, where each molecule exhibits a unique spectral “fingerprint,” lies in highly sensitive photodetector technology capable of measuring extremely weak light intensities.
Recently, KAIST researchers have developed an innovative photodetector capable of detecting a broad range of mid-infrared spectra, garnering significant attention. A research team led by Professor SangHyeon Kim from the School of Electrical Engineering has developed a mid-infrared photodetector that operates stably at room temperature, marking a major turning point for the commercialization of ultra-compact optical sensors.
The work is published in the journal Light: Science & Applications.
Bismuth-based hybrid materials enable highly sensitive, eco-friendly X-ray detectors
X-ray imaging is indispensable in medical diagnostics and material characterization. To generate an image, a detector converts X-rays that pass through the object into electrical signals. Higher detector sensitivity enables lower radiation doses, which is particularly important in medical applications.
Currently used X-ray detectors consist of inorganic compounds of elements with medium to high atomic numbers. In recent years, inorganic perovskite compounds have also been tested as X-ray detectors with very good results.
A more realistic look at DNA in action: Study shows it behaves differently when crowded by molecules
Most biochemistry labs that study DNA isolate it within a water-based solution that allows scientists to manipulate DNA without interacting with other molecules. They also tend to use heat to separate strands, heating the DNA to more than 150°F, a temperature a cell would never naturally reach. By contrast, in a living cell DNA lives in a very crowded environment, and special proteins attach to DNA to mechanically unwind the double helix and then pry it apart.
“The interior of the cell is super crowded with molecules, and most biochemistry experiments are super uncrowded,” said Northwestern professor John Marko. “You can think of extra molecules as billiard balls. They’re pounding against the DNA double helix and keeping it from opening.”
Doctor behind 80-year happiness study was ‘shocked’ by the biggest predictor of a long, healthy life
What if the secret to longevity wasn’t in the mind or the gut — but in the heart?
Speaking at the inaugural New York Times Well Festival on Wednesday, psychiatrist and researcher Dr. Robert Waldinger announced he and his team were “shocked” by “the biggest predictor of who was going to live long and stay healthy.”
Waldinger, the director of the Harvard Study of Adult Development — the longest-running scientific study of adult life — revealed the predictor was “how connected you were to other people and particularly the warmth of your connection to other people.”
