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Tag: "exist" at biology news

Otherworldly bacteria discovered two miles down

...t it is especially exciting to ponder whether they exist elsewhere in the solar system." ...

Malaria vaccine prompts victims' immune system to eliminate parasite from mosquitoes

... of the infection, these cells, for the most part, exist in an asexual form. Some of the Plasmodium cells, however, transform into gametocytes—the sexual forms of the parasite that are equivalent to sperm and eggs. Fertilization takes place in the mosquito gut, after which the parasite imbeds itself i...

U of MN researchers find novel genes critical in organ development

...between zebrafish and humans. This means the genes exist and have the same function in both zebrafish and humans....

Five new technologies that promise to transform medicine

...nse and transmit heart and breathing rates already exist and implantable lenses are well-known. Other emerging technologies include wave technology to isolate cancer cells, fabrication technology to manufacture customised body parts, and the use of miniature robots to track and destroy infections before...

A simple feedback resistor switch keeps latent HIV from awakening

...tion, the authors postulated that a resistor might exist in the Tat circuit. A simple mathematical model showed that the interconversion of the two forms, coupled with the known rate of breakdown of Tat, was sufficient to encode a resistor that explained Tat circuit shutoff and possibly the stability of HI...

How does a zebrafish grow a new tail?

...wth and development are found in humans, and drugs exist that can regulate this pathway, the findings are directly relevant to future testing of whether scientists can increase the capacity of humans to re-build damaged organs. ...

MIT creates 3-D scaffold for growing stem cells

...o mimic a living 3D microenvironment, but concerns exist about their degradation products and chemicals," the authors wrote in the paper. Other synthetic polymer biomaterials are simply too big. Getting cells to grow on them is like forcing spiders to build webs on skyscraper girders. Zhang's nanofiber s...

Fire ant-attacking fly spreading rapidly in Texas

...earchers identify where the latest phorid hotspots exist so that landowners can know where to bring fire ants from their property. Recently, the Texas Organization of Wildlife Management Associations adopted the initiative and plans to help promote the spreading of phorids by private ranching and wildlif...

Striking the right balance between excitation and inhibition

...long appreciated that these two classes of neurons exist in the central nervous system, little is known about how cells decide to become inhibitory or excitatory during embryonic development. Researchers at the Salk Institute for Biological Studies have now uncovered a pathway that plays a central role in ...

Gut reaction: Researchers define the colon's genome

...thii. How many unique bacterial genera or species exist in the colon community? By comparison to the outside world, Gill suspects the human gut is at least as complex as our soils or seas. With the evidence at hand, the researchers have described greater diversity in the human gut than researchers have re...

A splice of the action: Translational role for WT1 isoform

...of this study is that it highlights the links that exist between transcription and post-transcriptional gene regulation and the importance of alternative splicing. We hope that these results will stimulate further studies to identify genes that are regulated by WT1 at the translational level and the role t...

Bone marrow may restore cells lost in vision diseases

...there is growing evidence retinal progenitor cells exist in the adult," said Lawrence Rizzolo, Ph.D., a Yale University associate professor of anatomy and experimental surgery and of ophthalmology and visual science who was not involved in the research. "To derive cells of neuronal lineage from cells of bo...

Researcher studies, treats military with 'silent disease'

... has not been proven," she said. Currently no data exist in the United States indicating that people who have had tattoos are at increased risk for hepatitis C infection; however, the Centers for Disease Control and Prevention is currently conducting a large study to evaluate tattooing as a potential risk,...

Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience

...rved," he says; "We're not entering into 'Does God exist or not exist.' This work can't and won't go there." In the study, more than 60 percent of subjects described the effects of psilocybin in ways that met criteria for a "full mystical experience" as measured by established psychological scales. One...

Arctic expedition will investigate alien-like glacier

...st example on Earth for the conditions believed to exist on the surface of Jupiter's moon Europa. Ice-covered Europa is considered one of the best candidates for finding evidence of life on other planets within our solar system. Sending a probe to the planet is high on NASA's list of possible projects. Gra...

Mussels evolve quickly to defend against invasive crabs

...search in context. Because extensive data does not exist on invasive ecology, "there's a tendency to extrapolate any data you get on an invasive species. But here we show that the response from the prey differs over just a couple hundred kilometers." And while its "real world" impact is not immediately o...

Scientists discover why cornea is transparent and free of blood vessels, allowing vision

...ctedly that large amounts of the protein seemed to exist naturally on healthy corneal epithelium, a previously unknown location for the receptor. Dana and his team were already aware from clinical experience that the epithelium most likely played a role in suppressing blood vessel growth on the cornea, hav...

Giant deep-sea tubeworm's meal ticket comes in as a skin infection

...her says. "Most -- if not all --animals and plants exist in symbiosis withsome forms of microbes. We currentlyunderstand the early stages of symbiontacquisition for only a very few of themultitudes of symbioses. Since symbiosis isso widespread, understanding the mechanismsof symbiont acquisition is a first...

Sticky surfaces turn slippery with the flip of a molecular light switch

...a group of light-switchable organic molecules that exist in a colorless, "closed" form under visible light, but switch to a reddish-purple, "open" form when exposed to UV light. This change leads to an alteration of the new material's polarity, or the chemical structure of its atoms. In switching from non...

A new tool against brain disease

...D-1 switch could begin very soon, since such drugs exist already. However, he cautioned that these kinds of drugs could cause serious side effects, including autoimmune reactions that trigger the immune system to attack the body. Walker added that the researchers' findings will also likely have application...

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