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Blog – Page 32

Harnessing moisture from air, Northwestern University chemists have developed a simple new method for breaking down plastic waste.

The non-toxic, environmentally friendly, solvent-free process first uses an inexpensive catalyst to break apart the bonds in polyethylene terephthalate (PET), the most common plastic in the polyester family. Then, the researchers merely expose the broken pieces to ambient air. Leveraging the trace amounts of moisture in air, the broken-down PET is converted into monomers—the crucial building blocks for plastics. From there, the researchers envision the monomers could be recycled into new PET products or other, more valuable materials.

Safer, cleaner, cheaper and more sustainable than current plastic recycling methods, the new technique offers a promising path toward creating a circular economy for plastics. The study was recently published in Green Chemistry.

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Faster isn’t always better when it comes to high-speed materials science, according to new Cornell research showing that tiny metal particles bond best at a precise supersonic speed.

In industrial processes like cold spray coating and , tiny metal particles travel at extreme speeds and slam into a surface with such force that they fuse together, forming strong metallic bonds. This rapid, high-energy collision builds up layers of material, creating durable, high-performance components. Understanding how and why these bonds form, and sometimes fail, can help optimize manufacturing techniques and lead to stronger materials.

In a study published March 31 in the Proceedings of the National Academy of Sciences, Cornell scientists launched , each about 20 micrometers in diameter, onto an aluminum surface at speeds of up to 1,337 meters per second—well beyond the speed of sound—and used high-speed cameras to record the impacts.

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AI systems already work their magic in many areas of biomedical science, helping to solve protein structure, discover hidden patterns in the genome and process massive amounts of biological data. Now, an AI-assisted technology developed at the Weizmann Institute of Science and published in Nature Biotechnology may grant researchers and physicians an unprecedented means of peering deep into the body’s tissues by making it possible to simultaneously view more proteins than ever before, in a tissue sample.

“To understand how any particular tissue works, it’s crucial to measure lots of its proteins at the same time,” says Dr. Leeat Keren of Weizmann’s Molecular Cell Biology Department, who headed the research team. “This gives us an idea of which cells are present in the tissue and how they communicate and interact with one another.”

Keren explains that this knowledge is vital to the study of disease processes. Cancerous growths, for example, contain, in addition to , various other cell types, including healthy cells of the tissue the tumor is growing on and of the immune system. The cellular makeup of the tumor and how those cell types interact with one another can determine the effectiveness of therapies or be used to predict which patients have a better prognosis and which are likely to develop metastases. Such findings, in turn, can lead to improved personalized treatments.

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Unlike conventional silicon-based solar cells, perovskite solar cells (PSCs) are not only thin and lightweight, but can also be seamlessly applied to curved surfaces, like building facades and vehicle roofs. What’s more, they can be easily manufactured at room temperature using a solution process, leading to significantly reduced production costs.

However, for PSCs to achieve commercialization, it is crucial to develop technologies that maintain high efficiency over extended periods. A research team affiliated with UNIST has successfully made strides in this area. Their work is published in the journal Joule.

Professor Sang Il Seok of the School of Energy and Chemical Engineering at UNIST, along with researchers Jongbeom Kim and Jaewang Park, has developed an interlayer that leverages the specificity of organic cations on the surface of PSCs, simultaneously achieving and durability.

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The word “abated” is the focus of much debate in the context of carbon dioxide emissions. World leaders have this year been underlining their commitment to phase out the use of unabated fossil fuels: that is, where emissions from their combustion are not mitigated through offsets or carbon capture technologies.

The final text of the COP28 statement called for “abatement, and removal technologies, such as carbon capture and utilisation and storage, particularly in hard-to-abate sectors.” Meanwhile the G7 group of nations last year called for “a global effort to accelerate the phase-out of unabated fossil fuels to achieve net zero in energy systems by 2050.” Such commitments are important in the race to decarbonize traditional energy sources, but they raise an important question: How exactly should we define “abated” emissions?

Currently, there is no widespread agreement on the answer, specifically on how much carbon dioxide should be removed for emissions to be classed as “abated”. Some scientists argue this lack of definition risks hampering decarbonization efforts. “The term ‘unabated’, if left unchecked and poorly defined, could leave the interpretation of the commitment wide open,” said a 2023 working paper by a group of scientists at Columbia University cited by Reuters.

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An international research team coordinated at KIT (Karlsruhe Institute of Technology) has developed mechanical metamaterials with a high elastic energy density. Highly twisted rods that deform helically provide these metamaterials with a high stiffness and enable them to absorb and release large amounts of elastic energy. The researchers conducted simple compression experiments to confirm the initial theoretical results. Their findings have been published in the journal Nature.

Storage of mechanical energy is required for many technologies, including springs for absorbing energy, buffers for mechanical energy storage, or flexible structures in robotics or energy-efficient machines. Kinetic energy, i.e., motion energy or the corresponding mechanical work, is converted into elastic energy in such a way that it can be fully released again when required.

The key characteristic here is enthalpy—the energy density that can be stored in and recovered from an element of the material. Peter Gumbsch, Professor for at KIT’s Institute for Applied Materials (IAM), explains that achieving the highest possible enthalpy is challenging: “The difficulty is to combine conflicting properties: high stiffness, and large recoverable strain.”

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The Investor Relations website contains information about Eli Lilly and Company’s business for stockholders, potential investors, and financial analysts.

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Chronic kidney disease (CKD) populations face an elevated risk of cardiovascular disease (CVD), yet many remain undertreated with statins for primary prevention of CVD despite meeting eligibility criteria. We examined trends in statin use for primary prevention among individuals with CKD before and after the release of the 2013 Kidney Disease: Improving Global Outcomes (KDIGO) guideline recommending statin use for lipid management in selected adults with CKD.

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