Author: WeWorldMedia-admin

Researchers discover why plastic sheds dangerous fragments

Published: 7 April 2025
Categories: Engineering News

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The world is littered with trillions of micro- and nanoscopic pieces of plastic. These can be smaller than a virus — just the right size to disrupt cells and even alter DNA. Researchers find them almost everywhere they’ve looked, from Antarctic snow to human blood. In a new study, scientists have delineated the molecular process that causes these small pieces to break off in such large quantities.

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Tiny lenses grown from bacteria and enzymes may help doctors see inside cells

Published: 7 April 2025
Categories: National Science Foundation

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A team of researchers supported by the U.S. National Science Foundation has successfully made self-growing microlenses using bacteria and enzymes found in sea sponges. Because the microlenses are created by bacterial cell factories that function at standard temperatures and pressures, they are less expensive to produce — and they are exceptional at focusing light into very bright beams. The microlenses could allow for higher-resolution image sensors that go beyond current capabilities, potentially allowing doctors to more clearly see tiny structures inside cells.

In nature, sea sponges mineralize silica-based glass at a cellular level to create their intricate and strong glass skeletons. The researchers replicated that mechanism in a lab setting. Their research was published in Proceedings of the National Academy of Sciences

“This research is the first to engineer light-focusing properties into bacteria cells, and I am excited to explore the different possibilities that our work has opened up,” says one of the study’s authors and University of Rochester researcher Anne S. Meyer.

Credit: Photo by J. Adam Fenster/University of Rochester

University of Rochester graduate student Lynn Sidor prepares a batch of bacteria cells that will self-assemble their own glass coating, in the lab of associate professor Anne S. Meyer. Meyer has worked with colleagues in optics and physics to develop a new type of

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