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Tag: "heated" at biology news

Now, self-healing materials can mimic human skin, healing again and again

...ed with an epoxy resin. After curing, the resin is heated and the ink – which liquefies – is extracted, leaving behind a substrate with a network of interlocking microchannels. In the final steps, the researchers deposit a brittle epoxy coating on top of the substrate, and fill the network with a liquid h...

Study offers clues to 'Broken Heart Syndrome'

...atically, however, ranging from armed robbery to a heated argument, tooth extraction, or preparation for a colonoscopy. "We don't know why some women develop this syndrome after what appears to be minimal stress, while other women experience severely stressful events but don't develop Takotsubo cardiomy...

Bats prey on nocturnally migrating songbirds

...on invertebrates! This finding brought about a heated controversy among bat scientists. Some claimed that eating feathers was no proof of preying upon birds: they suggested that giant noctules could simply, and accidentally, ingest feathers hovering in the air, which are particularly numerous during mig...

Nanotechnology shows promise as next wrinkle fighter

...ckling of polymer films as they were compressed or heated during the manufacturing process, Ilsoon said the principles show promise to apply to human skin. The research is supported by the National Science Foundation and the Michigan Economic Development Corp. On all fronts, it's all about nailing a wr...

New technique boosts size of proteins that can be analyzed

... proteins inside the mass spectrometer -- sprayed, heated and then bashed with gas molecules -- to obtain th...p charges and are vaporized as they pass through a heated capillary. Then they are hit by air molecules in low-energy collisions to keep the protein from fold...

Microbe fixes nitrogen at a blistering 92 C

...s, an archaeon that was isolated from geothermally heated sand near an Italian beach and fixes nitrogen at temperatures up to 64 C. Nitrogen is necessary for all life because it is an essential part of amino acids and proteins. To be used by organisms, gaseous nitrogen must be converted to other compounds...

New evidence of early horse domestication

...aid. "Horses can survive ice storms and don't need heated barns or winter fodder," Olsen said. They are, in fact, some of the last remaining large, Ice Age, Pleistocene mammals living in one of the last places on Earth where Pleistocene vegetation survives. Because they were domesticated, the horses suppl...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...rely damaged. "They have been folded, distorted, heated and compressed so much that their minerals are very different from what they were originally," Harrison said. Why Akilia Island in Greenland? "Akilia Island was not the best place to search for evidence of early life; it's simply the place where ...

Bacteria beat the heat

...action to see how reaction rates changed as things heated up. A general rule for enzyme reactions states that as the heat rises, so does the reaction rate. Contrary to this rule, and the scientist's expectations, both reaction rates peaked at a certain point, and remained steady thereafter. For each enzym...

All placebos not created alike

...debate about the existence of a placebo effect has heated up over the past year as more and more lab experiments are detecting immediate physiological responses to placebos. A new study takes placebo investigations out of the lab and into a clinical trial, showing a discernible placebo effect over time, acc...

Why we give: New study finds evidence of generosity among our early human ancestors

...rrent Anthropology, will be critical for resolving heated debates about the function of altruism among hunter-gatherers. Strict forms of contingency require tit-for-tat, while more forgiving forms emphasize the work effort or relative contributions of others. Gurven examined food exchanges in two small-sca...

Brainstem blocks pain to protect key behaviors

...e rats ate, however, they postponed retracting the heated paw for six to eight seconds and continued to eat. Food choice made no difference. Rats focused just as intently on standard rat chow as when munching chocolate chips, yogurt drops or butter cookies. Although earlier studies found that eating to...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...th gold particles, are destroying tumor cells when heated with laser light. What's more, these nanoshells interact with light in specific ways, and can be "tuned" to discrete destructive wavelengths by varying the size of the core and the shell. A nanoparticle combined with a hormone and cell-killing pept...

Scientists develop nanotech-laser treatment that kills cancer cells without harming healthy tissue

...ear-infrared laser on the cancer cells, which soon heated up and died. "Folate is just an experimental model that we used," Dai says. "In reality, there are more interesting ways we can do this. For example, we can attach an antibody to a carbon nanotube to target a particular kind of cancer cell." One ex...

The right drug at the right time

...ed much since it was first developed. A solvent is heated to almost 500 degrees Fahrenheit, and solutions containing cadmium and selenium compounds are injected. They chemically decompose and recombine as pure CdSe nanoparticles. Once these nanocrystals form, scientists can adjust their optical properties b...

Method slashes quantum dot costs by 80 percent

...ed much since it was first developed. A solvent is heated to almost 500 degrees Fahrenheit, and solutions containing cadmium and selenium compounds are injected. They chemically decompose and recombine as pure CdSe nanoparticles. Once these nanocrystals form, scientists can adjust their optical properties b...

McGill researchers shed light on formation of carcinogen in food

... food-based amino acids and sugars break down when heated to produce furan. It also identifies other food components, such as vitamin C and polyunsaturated fatty acids, which may produce furan as an unwanted by-product of cooking, bottling or canning food products. "Furan and its derivatives sometimes form...

Nanoscale Diagnostic Sets Sights on Alzheimer's

...rom the rest of the sample. The complexes are then heated to release the DNA bar codes, which are then measured by an extremely sensitive detector. Each DNA piece greatly increases the sensitivity of the test and its potential to tell doctors a patient carries the ADDLs. According to the researchers, BCA i...

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