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Tag: "pass" at biology news

Fish evolve a longer lifespan by evolving a longer reproductive period, researchers find

...t adapted to their environment tend to survive and pass on their genetic characters in increasing numbers to succeeding generations ?introduces changes in only a specific segment of an organism's lifespan. The researchers conducted their experiments by comparing life-history traits in 240 guppies they ...

Why Christmas trees are not extinct

... result, water moving up through an evergreen must pass through 10 times as many valves (known technically...ings hold the trampoline in place." Water cannot pass through the central torus, but easily flows through the margo pores, which are about 100 times large...

Geoscientists follow arsenic from chicken feed to streambeds

... arsenic is adsorbed onto nanoscale particles that pass though our filters and through the soil column," said Schreiber. "This suggests that particle transport is an important mechanism in arsenic cycling in these watersheds." Graduate student Mary Harvey is currently studying the adsorption potential fo...

New class of antibiotics effective against drug-resistant bacteria discovered in fungi

... arsenic is adsorbed onto nanoscale particles that pass though our filters and through the soil column," said Schreiber. "This suggests that particle transport is an important mechanism in arsenic cycling in these watersheds." Graduate student Mary Harvey is currently studying the adsorption potential fo...

Membrane research opens window to benefits for plants, humans

...release the loop, opening the channel for water to pass through. The researchers theorize the gating activity is universal in all plant aquaporins, because sequencing has shown the gating loop to be conserved in them. "Plant cells close their water channels in response to drought stress in order to pres...

Zooming in on the protein-conducting channel

...hrough crystals of a target protein. As the x-rays pass through the crystal, they are diffracted. Researchers can then analyze the diffraction pattern to determine the atomic structure of the protein. The analysis by Frank and his colleagues revealed that each channel consists of two PCC subunits joined ...

Older female fish prefer imperfect male mates, study finds

...able to deal with environmental stresses and could pass on that resilience to offspring. Another explanation would be that the visual system "develops an internal prototype of an object that is based on an average of all the male fish [the females] have seen," Morris said. "Therefore, any fish they see t...

Clocking in Pillow Time without the Pillow

...l stay open longer when glutamate binds. More ions pass through the channel, creating a stronger signal when nerve cells are activated. The ubiquity of these receptors makes them good targets for drugs that increase general cognitive functioning. The researchers used a technique called positron emission ...

Noise And Delays Explain Why Some Genes Oscillate In Activity

...l stay open longer when glutamate binds. More ions pass through the channel, creating a stronger signal when nerve cells are activated. The ubiquity of these receptors makes them good targets for drugs that increase general cognitive functioning. The researchers used a technique called positron emission ...

Health of coral reefs detected from orbit

...hip program."The concern is that coral reefs might pass a critical bleaching threshold beyond which they are unable to regenerate." Aerial or boat-based observation is the current method of detecting bleaching, but many reefs are either inaccessible or simply too large (the Great Barrier Reef has an are...

Genetic analysis of Asian elephants in India reveals some surprises

...nly one. A region known as the Palghat Gap, a wide pass through the Western Ghat mountain range, was found to act a biogeographical barrier between the two in that case. "It is interesting that the Brahmaputra seems to have been a biogeographical barrier for several species," the authors write in their ...

Greasing interferon's gears may pave way to greater therapeutic benefits, fewer side effects

...1 recruited more of a specific protein it needs to pass on the interferon signal, essentially raising the speed limit on signal transmission. "Ordinarily, the interferon signaling system's rate may be slowed because this helper protein interacts with Stat1 at less than the maximum amount," Holtzman says...

What can change in the brain? Electrical synapses, research shows

...nels - which allow for lightening-quick signals to pass between neurons via ionic current - is only beginning to be understood. Last year, the Connors lab published research showing that electrical synapses help set the brain's master circadian clock. ...

New technique helps researchers determine amino-acid charge

...s that form channels to allow water and/or ions to pass through. Malfunctions have been linked to such problems as hypertension, abnormal insulin secretion, abnormal heart conditions and brain seizures. As a result, these membrane proteins are often targeted by drug treatments. Previous approaches didn't...

Scientists show how thinking can harm brain cells

...erve cell, and synapses, the places where impulses pass from neuron to neuron. Injury to dendrites ?characterized by swelling or beading, loss of dendrite spines, and reduction in size ?is seen in HIV-1-associated dementia and Alzheimer's. In laboratory studies, brain cells and slices were exposed to pla...

'Computer-chemistry' yields new insight into a puzzle of cell division

...k up other phosphate-containing chemical groups to pass along as part of a molecular bucket brigade. Rudolph initially knew the kinase's and phosphatase's general topographies as well as the locations of their active sites. "But it was literally a guessing game trying to find which residues might be impo...

Superconducting magnet attracts molecular research

...ils were supercooled, electric current was able to pass through them without resistance, creating the magnetic field. Once at field, the magnet uses no power at all, although the large liquid helium tank surrounding the coil needs to be refilled every six weeks or so. Once the magnet has been fully t...

New nanosensor uses quantum dots to detect DNA

...ergy. When a laser shines on a quantum dot, it can pass the energy on to a nearby molecule, which in turn emits a fluorescent glow that is visible under a microscope. But quantum dots alone cannot find and identify DNA strands. For that, the Johns Hopkins team used two biological probes made of synthetic...

Carbon nanotube absorption measured in worms, cancer cells

...d in society scientists must understand if they'll pass through the food webs and possibly threaten the health of ecosystems and lead to uptake by humans, Petersen said. "This approach has virtually limitless potential for facilitating important future investigations of the behaviors of carbon nanotubes...

UW scientists unravel critical genetic puzzle for flu virus replication

...asured by its genetic track record, its ability to pass on genes from one generation to the next. But while much is known about the genes and inner workings of flu viruses, how the microbe organizes its genetic contents to seed future generations of viruses has remained an enduring mystery of biology. N...

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