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    Decoding the neural basis of affective empathy: How the brain feels others’ pain

    March 12, 2025, Categories  Health/Medical, Biology/Biotechnology

    [그림1] 통증과 가려움 유발 자극에 의해 활성화된 뉴런의 시각화
    Experimental setup for observational fear testing and calcium imaging in observer mice. The observer mouse witnesses the demonstrator mouse receiving electric shocks, enabling the assessment of observational fear. During the experiment, miniature endoscopic calcium imaging is used to monitor neuronal activity in the observer’s anterior cingulate cortex (ACC). Green-labeled neurons indicate cells expressing calcium indicators (GCamp6f), while white-labeled neurons represent activated cells observed through calcium imaging (Raw). The observed behaviors in the observational fear experiment include observer freezing (OB-freezing; pink), demonstrator pain response (DM-reaction; blue), and demonstrator freezing (DM-freezing; yellow)...
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    ‘Nanodot’ control could fine-tune light for sharper displays, quantum computing

    March 12, 2025, Categories  Physics, Technology/Electronics, Chemistry/Nanotechnology

    Illustration of light emission from a molybdenum diselenide nanodot embedded in tungsten diselenide.
    On the left is an illustration of the experimental setup from this study. Molybdenum diselenide nanodots, represented by red triangles, are embedded in tungsten diselenide and encapsulated by hexagonal boron nitride (hBN) on top and bottom. A focused electron beam, shown in green, in a scanning transmission electron microscope (STEM) is aimed at the structure. The emitted light is collected to generate an intensity map. On the upper right is a dark-field STEM image of the molybdenum diselenide nanodot embedded inside tungsten diselenide. The contour of the nanodot is marked by dotted green lines. On the lower right is an artificially colored light emission intensity map of the same region, with the localized emission from the nanodot clearly visible. Credit: Provided by the researchers...
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    Evidence of a new phenomenon: Quantum tornadoes in momentum space

    March 12, 2025, Categories  Physics, Astronomy/Space

    Quantum tornado in momentum space: In the quantum material tantalum arsenide (TaAs), electrons form vortices in momentum space. Momentum space is a physics concept used to analyze how electrons behave in solids. A research team from the Cluster of Excellence ct.qmat at Würzburg and Dresden has now provided the first experimental evidence of these quantum tornadoes. (Image: think-design | Jochen Thamm)

    A team of researchers from Würzburg has for the first time experimentally demonstrated a quantum tornado. Electrons form vortices in the momentum space of the quantum semi-metal tantalum arsenide.

    Scientists have long known that electrons can form vortices in quantum materials...

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    Can melatonin supplements really ‘reverse’ DNA damage caused by lack of sleep?

    March 10, 2025, Categories  Health/Medical, Biology/Biotechnology

    Sleep isn’t just a luxury, it’s a vital process that helps our bodies repair and rejuvenate. Researchers have started to uncover how the quality and timing of sleep can affect more than just how rested we feel—it might also affect the very blueprint of our cells: our DNA.

    A new study from Canada found that melatonin, a hormone known for its role in regulating sleep, might help reverse some of the DNA damage caused by years of poor sleep.

    Melatonin is produced by the pineal gland in our brains when darkness falls. It signals to our bodies that it’s time to wind down and prepare for sleep. Beyond its sleep-inducing properties, melatonin is also a powerful antioxidant.

    Antioxidants help protect our cells from oxidative stress—a condition in which an imbalance between free radi...

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