Recent Comments

    Titanium Dioxide: E171 first enters the Blood via the Mouth

    May 24, 2023, Categories  Biology/Biotechnology, Health/Medical

    Titanium dioxide: E171 first enters the blood via the mouth
    Correlative secondary electron (SE) imaging, scanning transmission ion microscopy (STIM) and secondary ion mass spectrometric (SIMS) elemental mapping of ultrathin sections of buccal TR146 cells exposed to food-grade TiO2 (E171) particles for 24 hours. In contrast to the TEM images presented in figure 2, SE imaging obtained with a helium ion microscope (here, npSCOPE) reveals predominantly topographical information. The thin sections therefore show only limited contrast of the cell structures and the nanoparticles are easily recognized. For TEM-like imaging, the STIM detector attached to the npSCOPE prototype device allows investigation of the transmitted beam information and highlights the NP in relation to the cellular ultrastructure...
    Read More

    A Giant Leap Forward in Wireless Ultrasound Monitoring for Subjects in Motion

    May 24, 2023, Categories  Biology/Biotechnology, Health/Medical

    A wearable ultrasonic-system-on-patch mounted on the chest for measuring cardiac activity.
    A wearable ultrasonic-system-on-patch mounted on the chest for measuring cardiac activity. Photo by Muyang Lin for the Jacobs School of Engineering at UC San Diego

    A team of engineers at the University of California San Diego has developed the first fully integrated wearable ultrasound system for deep-tissue monitoring, including for subjects on the go. It facilitates potentially life-saving cardiovascular monitoring and marks a major breakthrough for one of the world’s leading wearable ultrasound labs. The paper, “A fully integrated wearable ultrasound system to monitor deep tissues in moving subjects,” is published in the May 22, 2023 issue of Nature Biotechnology.

    “This project gives a complete solution to wearable ultrasound technology — not only the wearable sensor, but also th...

    Read More

    Scientists make First Observation of a Polar Cyclone on Uranus

    May 24, 2023, Categories  Astronomy/Space

    NASA scientists used microwave observations to spot the first polar cyclone on Uranus, seen here as a light-colored dot to the right of center in each image of the planet. The images use wavelength bands K, Ka, and Q, from left. To highlight cyclone features, a different color map was used for each.
    Credits: NASA/JPL-Caltech/VLA

    Scientists used ground-based telescopes to get unprecedented views, thanks to the giant planet’s position in its long orbit around the sun.

    For the first time, NASA scientists have strong evidence of a polar cyclone on Uranus. By examining radio waves emitted from the ice giant, they detected the phenomenon at the planet’s north pole...

    Read More

    In-situ Observations of Marine Sedimentary Rocks Suggest Ancient Northern Ocean on Mars

    May 23, 2023, Categories  Astronomy/Space

    Ancient northern ocean on Mars evidenced by in situ observations of marine sedimentary rocks
    Topographic map of the northern hemisphere of Mars showing previously proposed shorelines. The red star denotes the location of the landing site of the Zhurong rover, ~282 km to the north of the Deuteronilus shorelines. The data are color-coded MOLA elevation over MOLA shaded relief centered at the North Pole with the Lambert azimuthal equal-area projection. Credit: Science China Press

    An international research team led by Professor Long Xiao from the School of Earth Sciences of China University of Geosciences (Wuhan) has discovered the presence of marine sedimentary rocks on the surface of Mars for the first time by comprehensively analyzing the scientific data obtained by the multispectral camera (MSCam) carried by the Zhurong rover...

    Read More