experiments 2 9

Tag: "experiments" at biology news

Evolution of life on Earth may hold key to finding life in outer space

...est aspects, then scientists may be able to devise experiments to see how simple RNAs might have given rise to this machinery. This information would help us to better understand how life evolved on Earth and how ribosomes actually work, which remains a fundamental problem in biochemistry." One of only a small ...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...ing strategies, NASA technologists have formulated experiments involving two NASA Earth observing satellites that fly in formation high above Earth. These consist of Aqua and the recently launched Aura, along with sophisticated atmospheric chemistry models that can forecast the global distribution and concentrat...

Stressed cells spark DNA repair missteps and speed evolution

...ir," said Rosenberg. Not only that, but subsequent experiments proved that this mechanism of increased mutation at sites of DNA repair occurs only in the cells under stress. "Even if you get a break in a cell, it won't process it in a mutagenic way," said Rosenberg. "The cell repairs it, but does not make mutati...

Scientists create digital bacteria to forge advances in biomedical research

...entCell now enables scientists rapidly to run test experiments on the computer, saving them valuable time in the ...y of the cell," Emonet said. Subsequent laboratory experiments came out exactly the same way. Sometimes, though, conducting the actual experiment would be undesir...

Computer modeling reveals hidden conversations within cells

...paring the model's predictions with the results of experiments with living cells. "The beauty of this kind of in...n of new experiments, and the how results of those experiments can be fed back into the model to improve it," said Shannon Werner, a graduate student in chemistry ...

Scientists use gene transfer technology and common virus to block neuropathic pain in animals

...nsmission of pain signals to the brain.?/p> In experiments reported in the Annals of Neurology paper, VA/U-M scientists tied off a nerve root in the sciatic nerve leading to the left hind paw of eight rats in the study. Tying off the nerve root makes the nerve degenerate and release substances that cause pai...

High carbon dioxide levels spur Southern pines to grow more needles

...ng several issues," she said. She also noted that experiments with other non-conifer broad-leaf species have made some scientists conclude that CO2-treated trees would not retain higher leaf counts after their canopies close. "These results are disputing that conclusion somewhat," she said. McCarthy's findings...

Virus uses tiny RNA to evade the immune system

...no longer essential for virus replication. Further experiments showed that cytotoxic immune cells were more likely to kill cells infected with a mutant virus that cannot make the microRNA than the normal virus. Thus, microRNA-induced reductions in T antigen expression promote escape from antiviral T cells withou...

Molecular trigger for Huntington's disease found

...hns Hopkins University School of Medicine reported experiments ranging from molecular studies in cultured brain c...th the most extensive pathology. The researchers' experiments also revealed that this p53 increase causes an overactivation in the genes regulated by p53, which i...

Breast tumors in mice eradicated using cancer vaccine

...we stopped measuring since this is a long time for experiments of this type," says Paterson. "The tumors stopped growing or went completely away." The researchers published their findings in the September 15 issue of the Journal of Immunology. "The problem that we encounter is that often by the time a patient p...

Scientists use gene transfer technology and common virus to block neuropathic pain

...he transmission of pain signals to the brain." In experiments reported in the Annals of Neurology paper, VA/U-M scientists tied off a nerve root in the sciatic nerve leading to the left hind paw of eight rats in the study. Tying off the nerve root makes the nerve degenerate and release substances that cause pai...

UW-Madison scientists zero in on drugs' sweet spots

...cal sciences Jon S. Thorson, describes a series of experiments that boosted the cell-killing potency and tumor sp...nes to greater precision and effect. The series of experiments performed by Thorson's team, for example, may help researchers enhance the anti-cancer effects of di...

Old drug shows new promise for Huntington's Disease

...otein synthesis within the cell. Massa hopes these experiments will confirm initial indications that Clioquinol preferentially interferes with synthesis of the toxic form of the protein. "Then we can move on to trying to isolate the actual mechanism of the drug," he predicted. "However," Massa cautioned, "the ...

Tissue regeneration operates differently than expected

...oth cell types. The researchers conclude that this experiments proofs that cell fusion of mesenchymal stem cells ...e basis for the regeneration mechanism. Additional experiments were focussing on the molecular mechanism underlying the cell fusion process. In these investigation...

Color perception is not in the eye of the beholder: It's in the brain

...rently seeing the same color yellow. "Those early experiments showed that everyone we tested has the same color ...l, automatic calibrator of color perception. These experiments show that color is defined by our experience in the world, and since we all share the same world, we...

Picky female frogs drive evolution of new species in less than 8,000 years

...so that you get all these independent evolutionary experiments going on. Perhaps that helps explain why places like the Andes are so extraordinarily diverse." Moritz; lead author Conrad Hoskin, a graduate student at the University of Queensland in St. Lucia, Australia; and colleagues Megan Higgie of the Univers...

Scientists discover new way to look at how molecules twist and turn on water

...surface, using a unique combination of laser-based experiments and computer modeling. These studies add important new insights into ongoing studies in the Richmond laboratory that seek to understand how these surfactant head groups change the properties of water at aqueous surfaces. ...

'License to kill' enables powerful immune attack cells in mice

...nd of pathology and immunology, discovered through experiments in mice that the arsenals of natural killer cells only become fully armed after a receptor on their surfaces interacts with a molecule on the surfaces of other cells. The molecular details of the process were so unusual that Yokoyama and his colleag...

Costly breeding programs for endangered species pay off

...itions in the wild." Meffert chose to conduct her experiments on common houseflies because they breed every few weeks. This model system allowed her to simulate several years of breeding for endangered species that breed only once or twice per year. In order to simulate small populations of rare animals in zoo...

Grasshopper love songs give insight into sensory tuning

...ndreas Herz of Humboldt-University Berlin describe experiments with grasshopper auditory neurons that reveal new ...ons of the auditory neurons to those sounds. These experiments revealed the distribution of stimuli called the "optimal stimulus ensemble" (OSE) that allowed the n...

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