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Tag: "exist" at biology news

Scripps research study shows humans and plants share common regulatory pathway

...d that certain protein regulatory structures might exist in both plants and humans simply because they do the same thing in much the same way. "In reality," he said, "there are only so many ways to accomplish related biological responses." The study also showed that a heat shock protein, HSP90, hel...

Farmed salmon could become an invasive species in forest streams

...opulations of escaped farm salmon are not known to exist on National Forest System lands, but the locations of Atlantic salmon farms and the sightings of escaped salmon indicate that streams on four national forests may be at risk: the Tongass and Chugach NF in Alaska, and the Olympic and Mount Baker-Snoqu...

Hotspots of mercury contamination identified in eastern North America

...ion advisories responding to mercury contamination exist in all the states and provinces included in the study, and loons are adversely affected by mercury levels they experience. The hotspots have implications for "cap and trade" approaches being implemented for regulation of emissions from coal-fired e...

Scientists find hormone activity explains adolescent mood swings

... neither the receptor nor the necessary conditions exist for this anxiety-producing effect of the stress hormone before puberty, because the expression of the receptor is dependent upon hormonal transitions, such as those that occur at puberty. This new finding of a change in the effect of a stress hormone...

New study sheds light on 'dark states' in DNA

...e, but this is the first time it has been shown to exist in three of the five bases of the genetic code -- cytosine, thymine and uracil. The detection of this dark state in single bases in solution increases the chances that it may be found in the DNA double helix, said Bern Kohler, associate professor o...

Scientists find potential 'off-switch' for HIV virus

...e onset of full-blown infection. Mechanisms do exist to halt the process, however. For example, another... the host." Weinberger said that drugs already exist that target other cellular enzymes, so there is reason to hope the approach will work. "There is...

Bioluminescence at the service of a novel cerebral imaging technique

...sed on long-term recordings. Such maps do not yet exist for any animal species, including man. A funding application has been made to the ANR in order to build up functional maps of the Drosophila brain. These maps are a prerequisite to producing a mass of data on the global activity of the entire ...

Large size crucial for Amazon forest reserves

...of forest it is easy to miss species that actually exist there. To distinguish real absences from detection failures, the authors used state of the art statistical methods developed by James Nichols and colleagues, at the U.S. Geological Survey's Patuxent Wildlife Research Center. "With a handle on the d...

RNA enzyme structure offers a glimpse into the origins of life

...tion and acid-base catalysis similar to those that exist for natural ribozymes and protein enzymes," he said....

Bats prey on nocturnally migrating songbirds

...the few other big aerial-hawking bat species which exist elsewhere in the world. Are some of them similarly stalking unwary songbirds during their massive nocturnal passes? The foraging habits of these rare bats still remain quite mysterious, like in the case of giant noctules until recently. Stable isotop...

OHSU lab finds meth receptor that could lead to therapy

..., the number of possible drug molecules that could exist ?is incredibly large. Our aim is to mine that space in order to uncover novel therapies." TAAR1 was originally discovered in the laboratory of David K. Grandy, Ph.D., OHSU professor of physiology and pharmacology. Grandy’s lab found TAAR1 is activ...

Trojan horse strategy defeats drug-resistant bacteria

...intensified in low iron condition, like those that exist in the human body. Gallium was even effective against strains of Pseudomonas aeruginosa from cystic fibrosis patients that were resistant to multiple antibiotics. In mice, gallium treatment blocked both chronic and acute infections caused by this bac...

New sensor detects gaseous chemical weapon surrogates in 45 seconds

...five," meaning that while the technical components exist and initial testing is complete, the system still must be converted to a prototype. ...

Genomics throws species definition in question for microbes

...and novel issues arose," says Roberts. "Conflicts exist between phenotypic and phylogenetic information, the means for classifying non-cultured microbes are limited under the current paradigm, and microbial species do not always demonstrate the phenotypic or genetic cohesiveness expected of them. For the...

Unicellular microRNA discovery

... “The finding changes the dogma that miRNAs only exist in multicellular organisms, and adds an important piece into the blooming small RNA world. A pressing question we have now is what these miRNAs are exactly doing in the green alga. I hope we will know the answers soon,?says Dr. Qi. MicroRNAs (miR...

Research project tackles 'regeneration' gap

...em cells ?the building blocks of self-renewal that exist within our brain, bone marrow and blood ?with scientists who study how tissues and limbs develop in a variety of organisms. "A salamander can be injured to the point that it loses its limbs or part of its spinal column, yet a few weeks later you’...

NYU scientists identify how development of different species uses same genes with distinct features

...t. However, bicoid is unique to flies and does not exist in wasps or other species: The study’s findings show that it takes several mRNAs localized in the egg to achieve the same functions in wasps as bicoid does in flies. Two of these genes, which are found in most species of insects, are orthodenticle. O...

Dig deeper to find Martian life

... find the living cells that scientists believe may exist well below the surface of Mars, according to research led by UCL (University College London). Although current drills may find essential tell-tale signs that life once existed on Mars, cellular life could not survive the radiation levels for long eno...

Proteins may predict lung transplant rejection

...ejection from among the thousands of proteins that exist in the lung. Disease disturbs protein function Lung transplants are a common therapy for many end-stage lung diseases such as chronic obstructive pulmonary disease, cystic fibrosis, pulmonary hypertension, idiopathic pulmonary fibrosis and ot...

Stem cells engage in dialogue with the cells that regulate their futures

... to speculate that maybe multiple potential niches exist for stem cells in our bodies that can be turned on to action when signaling stem cells are in the neighborhood. It may very well be that the power of cancer cells to spread comes from this natural ability of stem cells to make a home when in a hospit...

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