Category Biology/Biotechnology

Engineers shrink powerful terahertz systems onto a single semiconductor chip

Engineers shrink powerful terahertz systems onto a single semiconductor chip
A chip-scale terahertz source leveraging gain-enhanced interband photomixing for high-efficiency terahertz signal generation. Credit: Terahertz Electronics Lab/UCLA

High-frequency waves classified as terahertz occupy a relatively underused region of the electromagnetic spectrum between infrared light and microwaves. Researchers have long recognized their unique potential for applications including ultrafast wireless communication, security screening, remote sensing and medical imaging.

As technologies push toward higher operating frequencies and data rates, photonics-based terahertz systems, which use light at high speed to generate and process terahertz signals, have emerged as a promising alternative to conventional electronic technologies because of their superior bandwidth and p...

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Skeletal muscle signals to brain, brown fat to control aging in mice

Skeletal muscle signals to brain, brown fat to control aging in mice
The molecule mimecan — released from. Credit: skeletal muscle — helps neurons that activate brown fat maintain the length of their primary cilia (red). Restoring mimecan levels in older mice to that of younger mice helps maintain the length of the cilia and extends lifespan in older mice. Cell nuclei are in blue. Credit: Kentaro Mori

Open lines of communication between the body’s organs are important to health and often falter with age. A new study in mice by researchers at WashU Medicine shows how signals that travel from skeletal muscle to the brain and then activate brown fat and control core body temperature are weakened in elderly mice. The research suggests that finding ways to restore these signals could offer new opportunities to support healthy aging.

The study—led by S...

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Immune cells get transformed into fungus-fighting nanoparticles

Black circular blobs on a gray background.
Transmission electron microscopy image of the antifungal nanodiscs. Image courtesy of Liangfang Zhang lab

Tiny particles made from the membranes of human immune cells could offer a promising new way to fight fungal infections that are becoming harder to treat. Engineers at the University of California San Diego created antifungal nanoparticles that target Candida albicans, a fungus responsible for oral and vaginal yeast infections as well as life-threatening bloodstream infections. In mice with severe Candida infections, the nanoparticles greatly reduced the amount of fungus in major organs and significantly improved survival.

The research, published in Cell Biomaterials, was led by Liangfang Zhang, a professor in the Aiiso Yufeng Li Family Department of Chemical and Nano Engineerin...

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Evidence reveals that the language of thought is not natural language

Separating logic and language
Caption:A functional brain scan of a neurotypical participant in a new study shows a distinct separation between logic (green) and language (red/yellow) activations. Credit: Hope Kean

Some people find it useful to talk through their problems—but language isn’t necessary for logical reasoning, cognitive neuroscientists at MIT’s McGovern Institute for Brain Research say.

In research published in the journal PNAS, researchers led by MIT associate professor of brain and cognitive sciences Evelina Fedorenko have shown that people can perform well on tasks that require logical reasoning even if their language abilities are severely impaired. What’s more, brain imaging shows that language-processing parts of the brain are not called on for logical reasoning.

Philosophers, linguists an...

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