PCC STEM's Posts

By affixing nanoscale gold spheres onto a microscopic bead of glass, researchers have created a super-sensor that can detect even single samples of the smallest known viruses. The sensor uses a peculiar behavior of light known as "whispering gallery mode," named after the famous circular gallery in St. Paul's Cathedral in London, where a whisper near the wall can be heard around the gallery.
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When blown by chaotic winds in an urban environment, pollutants tend to accumulate in specific neighborhoods.
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Stem cells isolated from fat are being considered as an option for treating tissue damage and diseases because of their accessibility and lack of rejection. New research shows that this is not as straightforward as previously believed, and that fat-derived stem cells secrete VEGF and other factors, which can inhibit cartilage regeneration. However pre-treating the cells with antibodies against VEGF and growing them in nutrients specifically designed to promote chondrocytes can neutralize these effects.
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A new study shows that if you’re a juvenile moose trying to make it in the real world, you can’t beat an overprotective mom.
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A new "smart catheter" that senses the start of an infection, and automatically releases an anti-bacterial substance, is being developed to combat the problem of catheter-related blood and urinary tract infections.
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Nanoparticles reboot blood flow in brain

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Nanoparticles show promise in restoring blood flow to the brain when administered soon after a traumatic brain or other injury.
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Scientists have discovered a phenomenon never seen before in plants while studying molecular changes inside tree cells as wood is formed.
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Human melanoma stem cells identified

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Cancer stem cells are defined by three abilities: differentiation, self-renewal and their ability to seed a tumor. These stem cells resist chemotherapy and many researchers posit their role in relapse. A new study shows that melanoma cells with these abilities are marked by the enzyme ALDH, and imagines new therapies to target high-ALDH cells, potentially weeding the body of these most dangerous cancer creators.
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Researchers have shown for the first time that a specific sugar, known as GlcNAc ("glick-nack"), plays a key role in helping cancer cells grow rapidly and survive under harsh conditions. The finding suggests new potential targets for therapeutic intervention.
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Scientists have discovered one of the ways the influenza virus disarms our natural defense system. The virus decreases the production of key immune regulating proteins in human cells that help fight the invader. The virus does this by turning on the microRNAs -- little snippets of RNA -- that regulate these proteins. The researchers are among the first to show the influenza virus can change the expression of microRNA to control immune responses in human lung cells.
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Researchers have examined SEER data on 25,476 pancreatic cancer patients, correlating days spent on medical care with disease stage, type of treatment and survival time. The first of its kind, the study is intended to provide physicians and patients with vital information needed to maximize quality of life for people with pancreatic cancer.
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Researchers have created a new type of biosensor that can detect minute concentrations of glucose in saliva, tears and urine and might be manufactured at low cost because it does not require many processing steps to produce.
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