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Tag: "experiments" at biology news

Probing The Promise And Perils Of Nanoparticles

...he cell," said Banaszak Holl. But early results of experiments with living cells suggest that the same types of n...called polycation-mediated endocytosis. But Hong's experiments suggest that nanoscale hole formation may be at least as important in allowing materials to travel t...

Open microfluidic and nanofluidic systems

...roscopy (AFM) are shown in Figure 1. When the AFM experiments were first performed, it was not known how to prod...by light, temperature, or electric potential. The experiments described in the PNAS study use a polymeric liquid that freezes quickly and can then be scanned dire...

Elephants imitate sounds as a form of social communication

... signals with shared associations. Recent playback experiments conducted by Karen McComb of Sussex University have shown that elephants can remember the calls of a large number of other elephants. The new findings suggest that elephants, like parrots, bats, and dolphins, may use vocal learning to develop new com...

Amino acids in nectar enhance butterfly fecundity: A long awaited link

...contain substantial amounts of amino acids. Recent experiments have shown that butterflies actually prefer nectars with a high amino acid content. These findings led to speculations about the significance of nectar amino acids for butterfly fitness and insinuated that butterflies have acted as agents of natural ...

Same mutation aided evolution in many fish species, Stanford study finds

...cience, Mother Nature is more predictable than lab experiments suggest. In a diverse group of fish called the stickleback, nature took advantage of the same genetic trick time and again to allow freshwater species to shed their burdensome body armor and transform into a lighter, spryer fish. This is among the f...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...imals like monkeys.?/p> Meanwhile, in separate experiments with rats, researchers used gene therapy to completely reverse abnormal movements called dyskinesias in some of the animals, suggesting a new way to combat the flailing movements produced by a widely used drug treatment for Parkinson's disease. Levod...

New SARS Protein Linked To Important Cell Doorway

... little if any of it was on the surface." Further experiments revealed that part of the protein specializes in getting orf7a to the Golgi apparatus—the structure cells use to prepare proteins for transport to the cell surface--and keeping it there. Plans for follow-up include studies of a recently produced ver...

Jumping gene helps explain immune system's abilities

... Zhou, Ph.D., and Rupak Mitra, Ph.D.,discovered in experiments in test tubes and with E. coli bacteria.Although this loop distances Hermes from its well-studied cousins, theHermes protein still has an important family trait, the researchersreport. Colleagues at the National Institutes of Health found that afew k...

UCSD Discovery Shows How Embryonic Stem Cells Perform 'Quality Control' Inspections

... Zhou, Ph.D., and Rupak Mitra, Ph.D.,discovered in experiments in test tubes and with E. coli bacteria.Although this loop distances Hermes from its well-studied cousins, theHermes protein still has an important family trait, the researchersreport. Colleagues at the National Institutes of Health found that afew k...

New therapy for HIV/AIDS eliminates needles and excessive toxicity

... Zhou, Ph.D., and Rupak Mitra, Ph.D.,discovered in experiments in test tubes and with E. coli bacteria.Although this loop distances Hermes from its well-studied cousins, theHermes protein still has an important family trait, the researchersreport. Colleagues at the National Institutes of Health found that afew k...

DNA Recombination and Repair—A New Twist to RecA Function

... grown from mixing RecA protein with DNA. Previous experiments have shown that filament assembly spreads rapidly in the 5'-to-3' direction once the first RecA molecule is loaded onto DNA. At the same time, ATP hydrolysis causes the release of RecA from DNA, but the exact rate of RecA dissociation is not known. E...

Gene sequencing explains bioremediation 'bug'

... Zhou, Ph.D., and Rupak Mitra, Ph.D.,discovered in experiments in test tubes and with E. coli bacteria.Although this loop distances Hermes from its well-studied cousins, theHermes protein still has an important family trait, the researchersreport. Colleagues at the National Institutes of Health found that afew k...

First real-time view of developing neurons reveals surprises, say Stanford researchers

...ore establishing their final identity. Still, the experiments mark the first time researchers have been able to ...nitoring neurons will allow researchers to conduct experiments that were previously not possible. While the research showed neurons firing in a more mature way th...

New insight into people who 'see' colors in letters and numbers

...hts into the neural basis of perception. In their experiments with synesthetes who report seeing colors when the...who were tested on the same patterns. However, the experiments with both the synesthetes and the controls also revealed that the synesthetic colors were not as eff...

Newly Discovered Compound Blocks Known Cancer-Causing Protein

...sending signals for uncontrolled growth." Initial experiments showed that knocking out the Icmt protein using genetic targeting also inhibited Ras, so the scientists decided to search for an effective and specific molecule that could inhibit Icmt function. "We were looking for a small molecule that inhibited t...

X-Ray Beams And Fruit Fly 'Flight Simulator' Aid Scientists' View Of Muscle Power

...otions deep within the muscle cells.?/p> These experiments uncovered previously unsuspected interactions of various proteins as the muscles stretch and contract. The results suggest a model for how these powerful biological motors turn “on?and “off?during the wingbeat. “Small flying insects face an enormous...

Scientists discover that host cell lipids facilitate bacterial movement

...d in another intracellular bacteria, Shigella. Our experiments show that Listeria is a simplified model system for studying how phosphoinositides regulate the actin cytoskeleton, and this model promises to yield additional insights into how these phospholipids control the cell's actin cytoskeleton. Our discoveri...

Gene therapy for Parkinson's disease moves forward in animals

...her animals like monkeys." Meanwhile, in separate experiments with rats, researchers used gene therapy to completely reverse abnormal movements called dyskinesias in some of the animals, suggesting a new way to combat the flailing movements produced by a widely used drug treatment for Parkinson's disease. Levod...

How an AIDS-Related Cancer Unleashes Inflammation

...oteins," he said. Thus, the researchers conducted experiments in which they isolated proteins that bound with kaposin B in the cell. That screening revealed that kaposin B binds to a protein called MK2, which is known to play a role in boosting cytokine production. In further experiments, they discovered that ...

Antibiotic might fight HIV-induced neurological problems

...udies with the animals are augmented by laboratory experiments with cells to clarify observations. Notably, these laboratory experiments have shown that minocycline somehow suppresses replication of HIV and SIV in macrophages -- the immu...

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