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Tag: "introduced" at biology news

Many cleaners, air fresheners may pose health risks when used indoors

...me tests of terpene-containing products, ozone was introduced into the room at levels mimicking those that could occur in households or offices. The products were used in various ways according to package directions: some at full-strength and others at various dilutions as recommended on their labels. In some ...

Rehydrate -- your RNA needs it

...data is that in ribozymes, a chemical modification introduced at one place changes the local structure slightly," Walter said. The building blocks making up the ribozyme wiggle into different positions and in the process must let go of some hydrogen bonds and form others, just as partygoers shift position and e...

Virus has 'catastrophic' affect on red squirrels, research shows

...rrived to Britain with some of the greys that were introduced from North America over 100 years ago. The virus d... squirrels. "Given that the grey squirrel is an introduced species, and therefore the disease has occurred as a consequence of human action, the onus is very ...

Magnetism and mimicry of nature hold hope for better medicine, environmental safety

...ing dangerous chemicals if they were intentionally introduced into a public environment. It also could improve monitoring systems in factories and other industrial operations where potentially hazardous chemicals are in use. The research can accelerate the development of microfluidic devices that would, for i...

Gold nanoparticles could improve antisense cancer drugs

...A for EGFP expression. When the nanoparticles were introduced to the cells the fluorescence dimmed -- a result of the nanoparticles binding to the mRNA and shutting down the protein's expression, or fluorescence. "In the future, this exciting new class of antisense material could be used for the treatment of c...

Mussels evolve quickly to defend against invasive crabs

...the green crab Carcinus maenas. While Carcinus was introduced to New England from Europe between 150 and 200 years ago, Hemigrapsus is a relative newcomer, arriving from Asia to New Jersey in 1988. While previous research had established that mussels recognize Carcinus, it had not be determined if they recogniz...

New strategy rapidly identifies cancer targets

...out five as likely suspects. Druker's team then introduced into their leukemia cells five segments of RNA tha... important to show that the JAK3 mutation, when introduced in mice, would lead to a leukemia-like illness. It did, confirming that the JAK3 mutations play a...

Invasive species alter habitat to their benefit

...ttail; the invasive narrow-leaf cattail, which was introduced on the east coast in the early 19th century and eventually found its way inland; and a hybrid of the two species that is larger than either parent and tolerates a wider range of environmental conditions. In the marshes she studied, Farrer found th...

New flood-tolerant rice offers relief for world's poorest farmers

...h water. Going one step further, the researchers introduced the Sub1A geneinto a rice variety that is especially suited for growing conditionsin India. The resulting rice plants were not only tolerant of beingsubmerged in water but also produced high yields and retained otherbeneficial crop qualities. Develop...

Plants tell caterpillars when it's safe to forage

...ere on and plants were added. And when plants were introduced under dark conditions, about 30% less larvae were found hiding than were found in the dark without plants. Finally, to test the effect of plant volatiles directly, the researchers exposed larvae - some in the light and some in the dark - to a flow o...

Study shows frogs can play key role in stem cell research

...e specialised. In the study, Dr Gillian Morrison introduced frog PouV proteins into mouse embryonic stem cells...mit. Dr Morrison obtained similar effects when she introduced PouV proteins from another amphibian, the axolotl (a type of salamander). To find out exactly what ...

UCSD researchers develop 'smart petri dish'

...cells are particularly susceptible when a toxin is introduced to the body. Pharmaceutical companies want to know early on the effect a drug has on the liver. But it's very expensive to screen every potential candidate on living animals, typically rats. So if you can use just a few cells from the liver rather t...

Major initiative proposed to address amphibian crisis

...aid in their Science report. In places where it is introduced and has not previously been present, amphibian populations may disappear rapidly, sometimes within six months, the researchers said. Global climate change, the commercial trade of wildlife, and pollution may all increase the movement or susceptibilit...

Bacteria have their own immune system protecting against outside DNA

...iece of human DNA corresponding to that protein is introduced into bacteria. The bacteria then reproduce many times over, creating more of the protein each time they reproduce. The proteins are purified out from the bacteria, leaving behind only the useful protein. However, in that process, the yield of some hu...

Selectively blocking inflammatory signals may protect mice from MS

...uced a series of transgenic mice. In one set they introduced genes that produced interferon-gamma within the central nervous system. In another set they also introduced a gene (known as suppressor of cytokine signaling 1, or SOCS1) that blocked the response of myelin-p...

Potato blight pathogenicity explained by genome plasticity

...esistance ( R ) genes from wild species, which are introduced into cultivated potato by breeding, are matched by avirulence ( Avr ) genes in Phytophthora . While many such gene matches are predicted, only a few have been confirmed by molecular and functional studies. Avr genes are thought to undergo rapid ch...

Mutant mice show key autism traits

...ere far less likely to approach and sniff new mice introduced into their cage, compared to normal mice. And while normal mice show markedly less interest when such new mice are later reintroduced, the mutant mice did not show such a reduction in interest. This abnormality indicated "impaired social learning or ...

Americans support free access to research

...n (R-TX) and Sen. Joseph Lieberman (D-CT) recently introduced the Federal Research Public Access Act of 2006 (S.2695). The bill requires federal agencies that fund over $100 million in annual external research to make electronic manuscripts of peer-reviewed journal articles stemming from their research publicl...

Blood transfusion-transmitted infections: A global perspective

Thanks to the many blood-safety interventions introduced since 1984, the overall risk for most transfusion-transmitted infections has become exceedingly small. In the September 28 issue of the New England Journal of Medicine, Dr. Morris Blajchman, professor of Medicine at McMaster University, and medical...

Fire ant-attacking fly spreading rapidly in Texas

Parasitic flies introduced to control red imported fire ants have spread over...ly introduced. The fly, Pseudacteon tricuspis, was introduced to several locations in Texas beginning in 1999 with BFL in central Austin. The small traps captur...

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