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Tag: "drop" at biology news

Students invent protective pouch to enhance cell therapy

...so demonstrated that the device causes no pressure drop in the model blood vessels and that the microcapsules can easily be injected and withdrawn. Link said he and his team members appreciated the chance to solve a real-world engineering challenge while drawing on the expertise of prominent researcher...

HIV survival improves if patients stay in care

People with HIV who drop out of care do not live as long as those who remain under a doctor's treatment, said Baylor College of Medicine and Veterans Affairs researchers in a report published in the June 1 issue of Clinical Infectious Diseases and available on line. "In an...

Leukemia drug turns mini-molecules up, cancer genes down

...reatment increased the level of eight miRNAs and a drop in one compared with untreated cells. Of these...hey showed that the two miRNAs actually caused the drop in Bcl-2 activity. They did this by adding additional amounts of the two miRNAs to leukemia cells no...

How trees manage water in arid environments

...ws up in many ways. In Arizona, Brown said, if you drop a piece of ice on the kitchen floor and ignore it,... -- melted and then evaporated. In Indiana, if you drop a piece of ice on the floor and ignore it, the water will just stay there until it's wiped up. In...

Soft-cell approach cuts animal tests

...for toxicological testing and research." This is a drop in the ocean, compared with the animal death toll in the rest of the world. In many inhalation studies, the toxicity of airborne chemicals is tested on laboratory animals by placing them in enclosed chambers and subjecting them to increasing conc...

3 proteins may play important role in nerve-cell repair

... that carry the nerve impulses. Levels of cAMP drop in mammalian nerve cells as they mature, and this is thought to explain, in part, why mature nerve cells cannot regenerate damaged axons. "Our findings provide additional evidence that cAMP plays an important role in axon growth and suggest that ...

Iowa State University botanists identify new species of North American bamboo

..." Clark said. "It's pretty uncommon for bamboos to drop their leaves." Clark should know. She's an internationally recognized bamboo expert. She had previously discovered 74 new species of bamboo. "All the other new ones came from Central and South America," she said. "It's so exciting to find a ne...

Infection detectives use disease 'fingerprints' to track common infections in children

...chers extracted genetic material called RNA from a drop of blood and placed it on a special gene chip called a microarray, which contains probes for the whole human genome and measures which genes are turned on or off. In this study, researchers analyzed gene expression patterns in leukocytes from 29...

Researcher to study astronaut bone loss for space biology agency

...searchers to be ineffective. The result is a steep drop in the creation of new bone cells, leading to bone loss. To investigate the hypothesis, Long will take a two-pronged research approach. In the first part, he will study a model of skeletal loading and unloading in human bone cell culture. In the s...

Climate change could trigger 'boom and bust' population cycles leading to extinction

...off, but it turns out they're more vulnerable to a drop in resources," says Wilmers. Understanding how environmental changes influence fluctuations in animal populations is crucial to predicting and mitigating the influence of global climate change. In a paper that appears in the May issue of The Ameri...

Antarctic warming to reduce animals at base of ecosystem, shift some penguin populations southward

... A decrease in sea ice along the coast shows a drop in krill in the marine environment. As a major food source for higher animals, the loss of krill will reduce resources for higher mammals and birds. Data gained through the Long-Term Ecological Research (LTER) site near the American Palmer Statio...

Mystery of fossilized trees is solved

...e from the atmosphere. This caused temperatures to drop and the planet became very similar to its present-day condition." Dr Berry worked with colleagues from Binghampton University, New York and from New York State Museum, which discovered the two trunk fossils. Their findings are published in the Apr...

New sensor detects gaseous chemical weapon surrogates in 45 seconds

...ute. The miniscule level is similar to letting one drop of liquid DIMP evaporate into a volume of air that would fill more than two Olympic-size swimming pools. "QPAS is an extremely sensitive and selective chemical detection technique that can be miniaturized and yet is still practical to operate in f...

Living with water scarcity -- world must act now

... "While getting more crop, fish, meat and milk per drop is important for the environment, getting more value and nutrition per drop of water is a key for poverty reduction" says Molden. Improving access to water, and using it bett...

Making mice with enhanced color vision

...e other two. A correct answer was rewarded with a drop of soy milk. To circumvent thorny issues related to the subjective nature of color perception -- everyone who has had a discussion as to whether the "green" they see is the same as the "green" their friend sees can attest to this -- the researcher...

Hay fever can send work productivity down the drain

...405) had a traditional skin-prick test, in which a drop of allergen is placed on a patient's arm or back. The physician then pricks the skin through the drop, which lets the allergen enter the body. The doctor and patient then wait for a reaction, which could indicate an allergy. About one out of five ...

Reminding doctors which antibiotics to prescribe cuts C. difficile infection rates

...antibiotics use and CDI rates led to a significant drop in prescriptions of broad-spectrum agents, and an ...July 2001-March 2003). A statistically significant drop in use of both cephalosporin and amoxicillin/clavulanate was observed after the narrow-spectrum poli...

Manual dishwashing study digs up dirt on dish cleanliness

...DA also requires that washing cause a 100,000-fold drop in amounts of bacteria on those dishes. To investigate effective lower-temperature dishwashing tactics, the researchers coated dishes individually with cheese, eggs, jelly, lipstick, and milk, and then added Escherichia coli and Listeria innocua b...

'Hidden-hero' microbes in soil, water may help naturally clean toxic sites

...elp predict the rate at which contamination levels drop when using natural methods such as bioremediation and artificial techniques such as chemical additions and pH adjustments. Subsurface changes are monitored using geophysical methods that send acoustic, electric and other signals into the ground. ...

MIT device draws cells close -- but not too close -- together

...hing. And at wider distances, some soluble signals drop off. Bhatia and Hui have used the new device to study liver cells. The two found that to get liver cells to express specific liver functions, they needed to touch supporting stromal cells for 18 hours. For the liver cells to survive and continue t...

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