Toggle light / dark theme

Get the latest international news and world events from around the world.

Log in for authorized contributors

Scientists create food powder from waste, increasing shelf life from two weeks to two years

Food waste could actually feed millions of people globally and also have an endless shelf life if we freeze dry it and turn it into powder. This way we can keep large quantities of food for a very long time rather than having to freeze it or pickle it which only last so long due to freezer burn and pickling doesn’t work for long periods of time which can turn to poison essentially if contaminated.


Three students from Lund University in Sweden have set up a business called Fopo (freeze dried food powder) buying expired fruit and vegetables and turning it into food powder to resell back into the F&B market.

One way brain ‘conductors’ find precise connection to target cells

New research reveals how a class of neurons that help coordinate communication in the brain link up with their target cells, identifying two molecules that must be present before synapses, the structures that carry signals between these partners, can form on the target neurons.

These cells are inhibitory interneurons that connect to a specific location on target excitatory neurons, regulating information processing and maintaining proper balance in brain circuits by controlling how active the excitatory neurons become. Loss of coordination between these two types of cells, which leads to circuit malfunction, is associated with such disorders as epilepsy, depression, autism and schizophrenia.

CT Perfusion Abnormality in Hypoglycemic Focal Neurological Deficits

Stroke Image highlights the interplay between hypoglycemia and perfusion abnormalities in a person with acute focal neurological deficits.


ELetters should relate to an article recently published in the journal and are not a forum for providing unpublished data. Comments are reviewed for appropriate use of tone and language. Comments are not peer-reviewed. Acceptable comments are posted to the journal website only. Comments are not published in an issue and are not indexed in PubMed. Comments should be no longer than 500 words and will only be posted online. References are limited to 10. Authors of the article cited in the comment will be invited to reply, as appropriate.

Comments and feedback on AHA/ASA Scientific Statements and Guidelines should be directed to the AHA/ASA Manuscript Oversight Committee via its Correspondence page.

Advancing Early Detection of Alzheimer Disease in the Primary Care Setting in the United States

Background and ObjectivesAs evidence supporting the robustness of blood-based biomarker (BBM) testing for Alzheimer disease (AD) continues to emerge, understanding the perceptions, drivers, and barriers to the adoption of these tests among primary care…

Use of Ictal-Interictal SPECT in Localization of Surface-EEG–Negative Insular Epilepsy

This case demonstrates the use of ictal SPECT as an objective way to localize surface-EEG–negative insular seizures.


A 43-year-old woman presented with events characterized by a “funny” feeling in the head, nausea, and right-hand numbness/cramping. Events lasted minutes, without impaired awareness. Onset occurred 1.5 years after an embolic left middle cerebral artery stroke. MRI showed left temporoparietal and insular T2 changes.

Synchrotron‐generated microbeams as a radiosurgical alternative for drug‐resistant epilepsies: Proof of concept in a mouse model of mesiotemporal lobe epilepsy

“This proof-of-concept study highlights MRT as a promising non-invasive therapy for drug-resistant focal epilepsies with optimal peak doses of 125–250 Gy, and it suggests that distributing the dose through multiple angles optimizes the therapeutic effect. MRT could provide a safer alternative to surgery, warranting further investigations.”

Read this open-access research article from Epilepsia Journal at doi.org/10.1002/epi.70063.


Objective One-third of patients with epilepsy, particularly those with mesial temporal lobe epilepsy (MTLE), remain resistant to medication. Resective surgery, the gold standard, is highly invasive and carries significant risks. Here, using a mouse model, we explored the potential of microbeam radiation therapy (MRT), a new technique based on the spatial microfractionation of high-flux X-rays, as a non-invasive alternative for treating MTLE.

First standalone spin-wave chip operates without external magnets for future telecom

The Politecnico di Milano has created the first integrated and fully tunable device based on spin waves, opening up new possibilities for the telecommunications of the future, far beyond current 5G and 6G standards. The study, published in the journal Advanced Materials, was conducted by a research group led by Riccardo Bertacco of the Department of Physics of the Politecnico di Milano, in collaboration with Philipp Pirro of Rheinland-Pfälzische Technische Universität and Silvia Tacchi of Istituto Officina dei Materiali—CNR-IOM.

Magnonics is an emerging technology that uses spin waves —collective excitations of electronic spins in magnetic materials—as an alternative to electrical signals. The spread of this technology has been restricted until now by the need for an external magnetic field, which has prevented it being incorporated into chips.

The new device developed at the Politecnico overcomes this hurdle: it is miniaturized (100 × 150 square micrometers, so much smaller than current radiofrequency signal processing devices based on acoustic waves); it is fully integrated on silicon—and therefore compatible with existing electronic platforms, and it functions without external magnets, thanks to an innovative combination of permanent SmCo micromagnets and magnetic flux concentrators.

This crystal sings back: Study sheds light on magnetochiral instability

Researchers from The Grainger College of Engineering at the University of Illinois Urbana-Champaign have reported the first observation of a dynamic magnetochiral instability in a solid-state material. Their findings, published in Nature Physics, bridge ideas from nuclear and high-energy physics with materials science and condensed matter physics to explain how the interplay between symmetry and magnetism can amplify electromagnetic waves.

A material’s behavior is heavily influenced by its symmetries. One unique symmetry of interest to many physicists is chirality. Chiral materials have non-superimposable mirror images, like a right and left hand. For physicists like Fahad Mahmood, Rafael Fernandes and Jorge Noronha, the nonlinear interaction between chiral materials and light is of particular interest. How do these materials respond when light triggers effects beyond the straightforward, linear response?

“If I have a shiny crystal and I put a red laser on it, I’ll get red light back; that’s a linear response, as the frequencies—or colors—of the incoming and outgoing light are the same,” Mahmood said. “You can go a little further and try to excite some frequency so that it sends back a different color: you put red light on something, and it shines back as green, blue or yellow. That’s nonlinear response.”

/* */