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Tag: "costly" at biology news

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

...provide the long missing evolutionary link between costly nectar amino acid production by plants, nectar preferences of and fitness benefits to butterflies. This article by Jovanne Mevi-Schütz and Andreas Erhardt will appear in the April 2005 issue of The American Naturalist. ...

HIV Infection Still On The Rise

...ioration in services, rising HIV transmission, and costly consequences for tax payers," they conclude. ...

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...eed to sacrifice animals and perform laborious and costly analysis. To trigger living cells into producing their own contrast agent, Ahrens gave them a gene that produces a form of ferritin, a protein that normally stores iron in a non-toxic form. This metalloprotein acts like a nano-magnet and a potent MR...

Self-assembled nano-sized probes allow Penn researchers to see tumors through flesh and skin

... of cancer tissue, as such technology will be less costly and more accessible than MRI-based methods and free of the harmful side effects associated with radioactivity. In this imaging system, the flourophores can also be tuned to respond to different wavelengths of near-infrared light. This sets the stage ...

Not-for-profit publishers call NIH public access rule a missed opportunity

...This public-private partnership would be much less costly to NIH and would avoid the confusion that would re...e not been addressed. These include: # It will be costly and duplicative because NIH will create a new government program to supplant existing and highly suc...

Researchers devise way to mass-produce embryonic stem cells

...al laboratory methods used to grow these cells are costly and don't produce cells fast enough to respond to increasing demands for human embryonic stem cells, said Shang-Tian Yang, a professor of chemical and biomolecular engineering at Ohio State University. Federal rules forbid the federal funding of res...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

...ting new antibiotics can be a maddeningly slow and costly process ?if pharmaceutical companies even bother, says Hartmut Derendorf, chairman of the department of pharmaceutics at the University of Florida College of Pharmacy. Many would rather invest in compounds aimed at patients with chronic conditions su...

Shift of weather patterns necessitates rethinking of reforestation methods

... do survive, landowners find themselves paying for costly thinnings, Taylor said. Taylor's research is being conducted near the Texas A&M University Research and Extension Center at Overton. The Bruce McMillan Jr. Foundation, a perpetual trust dedicated to agricultural science and education, made avail...

Marine sponge yields nanoscale secrets

...s, high vacuums, and dangerous chemicals requiring costly remediation. Although the reported research marks an important step forward, Morse believes that the use of these biological methods to control such syntheses would be impractical on an industrial scale. The high cost of the purification of these pr...

At the molecular level, the predator is the prey

... sort of change in the sodium channel would be too costly to the snakes," said Utah State University biologist Shana Geffeney, who conducted the gene expression experiments. "What will be interesting in the future is to understand if there is a balance between the costs of the changes in the channel pore st...

Tsunami-damaged coral reefs should be left to recover naturally, say scientists

...ents should be very careful not to commit funds to costly repair programmes that may have little long-term effect. About 20 per cent of the coral reefs in places such as Thailand and Sri Lanka were badly affected by the tsunami that happened in December last year. The damage was mainly caused by the backwa...

It's electric: Cows show promise as powerplants

.... But converting methane into electricity requires costly equipment : one California farmer reportedly spent $280,000 to convert his operation to a methane digester system. "Methane still needs to undergo combustion, which creates issues with energy efficiency," said Hamid Rismani-Yazdi, the study's lead a...

Looks matter to female barn swallows

...s a peacock's tail or a deer's antlers -- that are costly for males to maintain but give them an edge over r... basis, it explains why males continue to maintain costly ornaments even when they might appear to have served their purpose," said co-author Irby Lovette, as...

Engineered molecule amplifies body's immune response

...er. Unfortunately, administration of interferon is costly and short-lived and has significant side effects. We simply reasoned that it might be possible to improve the benefits of interferon by enhancing the way it produces its beneficial effects. We therefore improved a molecule, known as Stat1, that is re...

New technique rapidly detects illness-causing bacteria

...University scientists have developed a rapid, less costly and sensitive new technique for detecting group A ... technique called gene amplification that requires costly equipment: Technicians take a piece of DNA from a sample and add enzymes that make many copies of th...

A novel method to measure circadian cycles

...red period of lengthy observation is prohibitively costly and labor intensive. Circumventing these technical limitations, Ueli Schibler and colleagues report in the open-access journal PLoS Biology a new method to measure circadian cycles in mammalian cells cultured from tissues other than the suprachia...

Quantum dots provide a faster, more sensitive method for detecting respiratory viral infections

...em should also be relatively inexpensive. The most costly ingredient is the quantum dots: A small bottle that contains enough of the material for about 200 tests costs $300. As a result, this could be one of the earliest medical applications of nanotechnology, Wright and Crowe say. The researchers' next s...

A vaccine to kill tapeworm

...in people too. But safety issues make it much more costly to develop a human vaccine, and it should not be necessary, says Gauci. "An effective control programme would involve treating people with existing drugs to remove tapeworm from a population and preventing the reinfection of the human population by v...

From a Few Wild Ancestors, a Citrus Cornucopia

...e specimens had even been mislabeled.?Mistakes are costly for curators, since a few missing or added letters can change the way a specimen is classified and managed -- and possibly how it will be used. “For example, one accession planted in the field,?says Krueger, “was considered to be a Rangpur lime, or ...

Stem cells bring fast direct improvement, without differentiation, in acute renal failure

...ently needed to treat this common, devastating and costly human disease," Westenfelder said. Challenging the accepted theory of stem cell operation In a new study, Westenfelder's team reported that injecting stem cells similar to the type used in bone marrow transplants is "highly renoprotective, showing ...

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