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Tag: "fast" at biology news

New protein inhibitor impedes growth of cancerous cells

... February 8th. Because cancer cells are typically fast growing and can mutate to adapt to new growth conditions, effective drug-based therapies will likely succeed in part by impeding multiple functions required for cell division and survival. One particular class of proteins, known as kinases, is known ...

New mechanism for nutrient uptake discovered

...ent pores allows the system to shut down extremely fast and can even memorize previous exposures," noted co-author Wolf Frommer. "Imagine a large animal marking its territory. A sudden flow of ammonia could be toxic to the plant. If it weren't for a rapid-fire shutdown plants could die. The conservation o...

New study sheds light on 'dark states' in DNA

... quarter of an inch. Still, a picosecond is not so fast compared to the speed of some chemical reactions in living cells. In tests of single DNA bases, the dark state lasted for 10-150 picoseconds -- much longer than the bright state. The chemists reported their results in the Proceedings of the Nationa...

Keeping the body in sync -- The stability of cellular clocks

...the cellular clocks. Stability is a measure of how fast the system reverts to its initial state after being perturbed. “To my knowledge we are the first to discuss how the stability of the oscillator directly affects bioluminescence recordings,?explains Felix Naef, a systems biology professor at EPFL ...

Researchers create artificial enzyme that mimics the body's internal engine

...Western movie." But the electrons are consumed too fast to study individually, he noted. Therefore, the researchers had to invent a technique that supplied electrons to their enzyme model in a slow and continuous way. They solved the problem by attaching the model to a liquid crystalline film on a gold el...

FSU researchers determine a critical factor in workings of proteins

...t-Aldrich syndrome protein," Zhou said. "Normally, fast association of the protein with other biomolecules is critical for the creation of proper cell structures. The failure of the protein to associate quickly, then, is the root cause of the condition." In their Structure paper, Zhou and graduate stud...

Proteins important in Alzheimer's, Parkinson's disease travel in the slow lane

.... "There are two basic transport groups called fast and slow components, with a 200 to 300 fold differ...icine. "While scientists have seen proteins in the fast component move rapidly to the tip of the axon, until now, mechanisms of the slow movement of these d...

Natural gut hormone offers hope for new obesity drug

...ly that if we are successful, the treatment may be fast tracked to meet the urgent demand to tackle the obesity crisis," she explains. "There is currently a lack of effective treatments and our proposed drug is based on a natural way of controlling the body's appetite, which makes it more attractive." ...

New antibacterials being developed to tackle MRSA superbug

...ficult to treat. "The so-called superbug MRSA is fast becoming untreatable with the currently available antibiotics," says Dr Ted Bianco, Director of Technology Transfer at the Wellcome Trust. "We urgently need a new generation of antibacterial medicines to stop its spread through hospitals, nursing hom...

Some caterpillers just don't want to grow up

...asymmetry between last year's slow and this year's fast developing caterpillars ?can explain why more than 50% of caterpillars mature in their second season. Yet, according to the currently available data, the effect seems to be too weak to fully explain the large proportion of caterpillars delaying devel...

Living with water scarcity -- world must act now

...ble. Agricultural practices are changing, but not fast enough. The Assessment shows that with wise policies and investments in irrigation, upgrading rainfed agriculture, and trade it is possible over the next 50 years to limit future growth in water withdrawals to 13% and cultivated land expansion t...

Targeting tumors the natural way

...erfully attracted to the target receptor and holds fast to any cell displaying it. Although this strategy has benefits, it's not natural, says Kiessling. Cell recognition in living systems instead involves binding agents that attach only weakly to any single target receptor, and thus stick to cells only...

Brown team finds crucial protein role in deadly prion spread

...n fragmentation we studied has a big impact on how fast prion diseases spread and may also play a role in the accumulation of toxic proteins in neurodegenerative diseases like Parkinson's," said Tricia Serio, an assistant professor in Brown's Department of Molecular Biology, Cell Biology and Biochemistry ...

Coated nanoparticles solve sticky drug-delivery problem

...logy at Johns Hopkins. "The shocking thing was how fast the particles that were 500 nanometers wide moved through the mucus mesh. The work suggests that the openings in the mucus barrier are much larger than originally expected by most. And we were also surprised to find that the larger nanoparticles (200...

CSIRO imagery shows Outer Great Barrier Reef at risk from river plumes

...owing unconventional patterns and travelling quite fast as far as 65 to 130km, to the outer reef and, in s...llites imaging the Earth and CSIRO has invested in fast information delivery systems. The images answer many of the questions posed in the article 'Catt...

Cells selectively absorb short nanotubes

...d safety impacts of SWCNTs could derail efforts to fast track the development of nanotubes for advanced technology applications. A significant hurdle in outlining the parameters contributing to nanotube toxicity is to prepare well-defined and characterized nanotube samples, as they typically contain a dis...

Huddling and a drop in metabolism allow penguins to survive the South Pole cold

...w the emperor penguins endure their incubation and fast for four dark and bitterly cold months each year. ... that the proportion of sleep increases during the fast of emperor penguins, and that sleep is associated in penguins with an eight percent drop in metaboli...

U of M researchers invent 'flashy' new process to turn soy oil, glucose into hydrogen

...f glucose in water, the process heats the sugar so fast that it, too, breaks up into syngas instead of its usual products: carbon and water. A difficulty in turning plant material into usable fuels has been breaking down the chemical bonds in cellulose--the material that gives plant cell walls their sti...

Growth factor stimulates rapid extension of key motor neurons in brain

...owth of axons by 15- to 20-fold, reaching the very fast rates previously seen only during initial development. Blocking the interaction between IGF-1 and its receptor reduced axon growth to control levels, confirming that the IGF-1 pathway is critical to the enhancement effect. Experiments with anot...

'Protecting virus' offers instant flu protection and converts flu infections into their own vaccines

...ch faster rate than the new influenza virus. This fast reproduction rate ?spurred by the new flu infection ? means that the new invading influenza is effectively crowded out by the 'protecting virus'. This vastly slows the progress of the new infection, prevents flu symptoms, and gives the body time to ...

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