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Tag: "performed" at biology news

Membrane research opens window to benefits for plants, humans

... Modeling and Bioinformatics. The simulations were performed at both the National Center for Supercomputing Applications at Illinois and the Pittsburgh Supercomputer Center. Swedish co-authors were Kristina Hedfalk, Urban Johanson, Maria Karlsson, Kjellbom, Neutze and Susanna Tornroth-Horsefield. ...

The dangerous legacy of lead

...blished that T cell function was targeted by lead, performed the laboratory work. Farrer also has shown that another crucial immune system cell ?myeloid suppressor cells, which control runaway immune responses ?may also be disrupted by lead exposure in mice. The next step is to understand how this applies to ...

Team led by Carnegie Mellon University scientist finds first evidence of a living memory trace

... Konstanz Universität in Konstanz, Germany. Galán performed the work as part of his dissertation research whil...stimulus, whereas we have." The experiments were performed in the laboratory of Randolf Menzel, whose pioneering observational experiments in the 1970s and 198...

Genetic analysis of cavefish reveals more about evolution

...d genes. To clarify their results, the researchers performed a complementation test fish in both caves, which yielded only albino offspring. They concluded that albinism in these two cave populations and in a third population not yet as well studied is caused by mutations in the same gene. Subsequent analyses ...

Clocking in Pillow Time without the Pillow

...ns. They found that sleepy monkeys taking the drug performed tasks better and had increased metabolic activity in several regions of their brains. This suggests that the cognitive effects of sleep deprivation can be reduced chemically. The researchers kept the monkeys awake for 30 to 36 hours by playing music...

Noise And Delays Explain Why Some Genes Oscillate In Activity

...ns. They found that sleepy monkeys taking the drug performed tasks better and had increased metabolic activity in several regions of their brains. This suggests that the cognitive effects of sleep deprivation can be reduced chemically. The researchers kept the monkeys awake for 30 to 36 hours by playing music...

Marathon of nano-sprinters

...omplex situations, in which the cargo transport is performed by different types of molecular motors. All transport properties predicted by the new theory can be investigated in experiments using techniques which have been developed for single motors. In fact, preliminary ex-periments at the Max Planck Instit...

New brain scan technology could save babies' lives

...ied out. The other alternative, ultrasound, can be performed at the cot side and is effective at revealing brain anatomy, but cannot show how the brain is actually functioning, e.g. in terms of oxygen supply and blood flow. Combining the advantages of MRI and ultrasound but avoiding their disadvantages, MONST...

Polio vaccination strategies assessed as eradication nears

...isease. But all research on the subject had been performed using only one dose of a vaccine that was less potent that the currently used version. Konstantin Chumakov, PhD, and colleagues at the Food and Drug Administration and various other institutions throughout the United States revisited the issue using ...

'Sharp' older brains are not the same as younger brains

...of 2-year-old (considered "aged") rodents that had performed in the "young" range on various learning tasks. The aged rats' brains also were compared with those of older rats which showed declines in their abilities to learn new things. The researchers were looking at a key set of nerve cell connections that s...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

... work in isolating and purifying the pheromone was performed by Sorensen's graduate student Jared Fine, while Vadims Dvornikovs, Christopher Jeffrey and Feng Shao in Hoye's lab were integral to synthesizing the key component, called PADS. The chemical structure of PADS is very similar to that of squalamine, a ...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

... work in isolating and purifying the pheromone was performed by Sorensen's graduate student Jared Fine, while Vadims Dvornikovs, Christopher Jeffrey and Feng Shao in Hoye's lab were integral to synthesizing the key component, called PADS. The chemical structure of PADS is very similar to that of squalamine, a ...

Algal protein in worm neurons allows remote control of behavior by light

...ng behavior in response to touch. The researchers performed electrophysiological experiments to show that the effects they observed were indeed due to the inward flow of ions caused by activation of the ChR2 protein by light; this inward ion flow persisted for the duration of blue-light exposure. Future wor...

Olfactory system detects pheromones that control reproduction

...of mice," she said. As a control, the researchers performed a separate set of experiments using a non-conditional strain of the pseudorabies virus. These studies confirmed that the virus was capable of infecting all nuclei comprising the vomeronasal system. Next, the researchers postulated that one should be...

Feds give researchers ok for safety test of adult stem cells in patients with heart disease

...coronary artery bypass graft (CABG) surgeries were performed worldwide and approximately 1.8 million balloon angioplasty procedures were performed. While these interventional therapies are now the standard of care, there are still a significant number of people for whom these methods do not work, or who have b...

USC researchers track down the stem cells that create feathers

...n the December 15 issue of the journal Nature, was performed by a group of prominent stem-cell researchers from the Keck School of Medicine of the University of Southern California. "What we found is that feather stem cells are distributed in a ring configuration around the inner wall of the vase-shaped feath...

Children overprescribed antibiotics for sore throat

...antibiotics (49 percent to 38 percent). Physicians performed a GABHS test in 53 percent of visits and in 51 percent of visits at which an antibiotic was prescribed. GABHS testing was not associated with a lower antibiotic prescribing rate overall (48 percent tested vs. 51 percent not tested), but testing was a...

In SAD patients, autumn antidepressants can prevent winter depression

...D over 20 years ago. Dr. Rosenthal and colleagues performed a study with more than 1,000 patients with SAD from the northern United States and Canada. The patients, 70% of whom were women, reported an average of 13 previous episodes of fall-winter depression. Notwithstanding this long history, almost 60% of ...

Chlamydia parasite lives off our fat

...plets and Chlamydia was made as Kumar and Valdivia performed the genetic equivalent of an end-run. Chlamydia is not amenable to direct genetic manipulation so the researchers moved the pathogen's genes elsewhere, inserting them into the eukaryotic cells of baker's yeast. The resulting chlamydial proteins were ...

Scientists crack code for motor neuron wiring

...e also expressed in the spinal cord." Earlier work performed by Dasen and Jessell, in collaboration with Jeh-Ping Liu, who is now at the University of Virginia, established that certain Hox proteins control the differentiation of motor neurons into columns in the spinal cord. These columns, which are arrayed a...

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