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    polyethylene tagged posts

    Stiff, Achy Knees? Lab-made Cartilage Gel Outperforms the Real Thing

    August 12, 2022, Categories  Biology/Biotechnology, Health/Medical

    A hydrogel-based implant could replace worn-out cartilage and alleviate knee pain without replacing the entire joint. Photo courtesy of Benjamin Wiley, Duke University.

    Over-the-counter pain relievers, physical therapy, steroid injections—some people have tried it all and are still dealing with knee pain.

    Often knee pain comes from the progressive wear and tear of cartilage known as osteoarthritis, which affects nearly one in six adults—867 million people—worldwide. For those who want to avoid replacing the entire knee joint, there may soon be another option that could help patients get back on their feet fast, pain-free, and stay that way.

    Writing in the journal Advanced Functional Materials, a Duke University-led team says they have created the first gel-based cartilage s...

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    Upcycling: New Catalytic process turns Plastic bags into Adhesives

    December 18, 2020, Categories  Chemistry/Nanotechnology

    Using a catalyst based on ruthenium (gold ball, center), UC Berkeley chemists were able to add specific chemical groups — in this case, OH (red) – to polyethylene polymer chains, creating an oxidized polyethylene (foreground) that adheres strongly to metal but retains the unique plastic properties of the polymer. (UC Berkeley image by Liye Chen)

    Converting polyethylene packaging into high-value products incentivizes plastics recycling. Only a small percentage of plastic bags and other polyethylene packaging is recycled because only low-value products can be made from this waste. Chemists have created a catalytic process that preserves the desirable properties of polyethylene while adding another attribute – stickiness – that increases the value of the recycled product...

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