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Tag: "cultures" at biology news

Florida Tech explores microalgae for biofuel

...to test conditions that will optimize large-volume cultures of microalgae in outdoor, open settings. Cultures in outdoor systems are difficult due to the openness to light, temperature and potential contamination. Lin will manipulate dependent variables such as salinity, nutrient concentrations, pH and carbon...

DNA layer reduces risk of reserve parts being rejected

...ultilayer coating. This coating was tested in cell cultures and animal experiments for its safety, immune response, bone attachment and functionalisation. The DNA layer was also found to speed up the deposition of calcium phosphate and could, for example, be adapted to promote bone and blood vessel formation....

Targeting tumors the natural way

...the cells with large amounts of alpha-Gal. In cell cultures containing human serum, the alpha-Gal then elicited the cell-destroying immune reaction. In cells with low concentrations of integrin, the agent still bound, but the resulting levels of alpha-Gal weren't sufficient to elicit the immune response, a...

Birth rate, competition are major players in hominid extinctions

...e populations moved with the forest, early hominid cultures 2.5 million years ago show signs of the ability to live in marginal areas and live on more dynamic, seasonal landscapes," Jablonski told attendees today (Feb. 16) at the annual meeting of the American Association for the Advancement of Science in San...

Researchers discover surprising drug that blocks malaria

...on with existing anti-malarial drugs in human cell cultures and mice, it reduced the dose of the anti-malarial drugs needed to kill the parasites by tenfold. That's significant because high doses of anti-malarial drugs ?increasingly necessary as resistance to them builds -- can be toxic. In addition, blood ...

Scientists discover a new risk factor for Alzheimer's

...hat if you reduce SORL1 expression--in either cell cultures or mice--you get an increase in the production of amyloid-beta. Now we can add our new observation that variants of the SORL1 gene are associated with an increased risk of Alzheimer's." St George Hyslop said that other researchers need to replicate...

How genetic malfunction causes a form of retardation

...tes glial cells. And in experiments with both cell cultures and mouse embryos, they found that the same kind of mutation in SHP-2 that can be found in NS patients disrupts the neuron-glial balance by further promoting the formation of neurons and inhibiting glial cell formation. The researchers also studie...

Soft-cell approach cuts animal tests

...s. The advantage of using human cell lines and cultures is that the researcher can study toxicity mechanisms at the molecular/cellular level at an earlier stage specifically for individual chemicals, depending on their site of action within the human body without using animals. For example, when assessing...

Get a whiff of this: Smell test could sniff out serious health problems

...with a name) and people representing international cultures (who are unfamiliar with some common odors in the U.S.). “What’s also unique about this test is that it does not require a good memory, which is an issue in testing people with Alzheimer’s or some other dementia-related disease,?Frank says. “For inst...

Growing nerve cells in 3-D dramatically affects gene expression

... shows that nerve cells grown in three-dimensional cultures use 1,766 genes differently compared to nerve cells grown in standard two-dimensional petri dishes. The study, published in the May issue of Tissue Engineering, adds to a growing body of research showing that culture techniques can significantly ...

Gene thought to assist chemo may help cancer thrive

...to test their theory by conducting studies in cell cultures and mice. If it bears out, then disabling the gene in tumors, through medications or new genetic techniques during chemotherapy may help patients survive....

Anthrax paralyzes immune cells with lethal toxin, UF research shows

... current method of detecting anthrax relies on lab cultures that can take days to complete. "We're looking for approaches to detect anthrax earlier in the blood," said Russell During, Ph.D., a postdoctoral fellow at UF's College of Medicine. "We're trying to develop a test that would allow detection within...

Helping chlorine-eating bacteria clean up toxic waste

...des needs vitamin B-12, so the vitamin is added to cultures that are injected into cleanup sites. The bacterium also grows better in a mixed community with other kinds of bacteria. "There are some factors it needs from other organisms, and we don't know yet what they are," she said. Her laboratory will tes...

Marine phytoplankton changes form to protect itself from different predators

...s were then separately introduced into Phaeocystis cultures that had not been attacked. The scientists then studied how the different chemical signals affected the percentage of Phaeocystis living in colonies or as solitary cells. Finally, they examined whether this response affected how much the predators ...

Bacteria ferry nanoparticles into cells for early diagnosis, treatment

...Nanotechnology. Experiments were carried out in cultures of human cancer cells, including intestinal, oral, liver, ovarian and breast cancer cells. The researchers also tested their method on live mice and showed how the technique could be used to deliver specific genes to various organs, including the liv...

New collaborative research reveals chimpanzees can sustain multiple-tradition cultures

Scientists have long wondered if local animal cultures exist, and now, based on findings by researchers a...ity to sustain the same kind of multiple-tradition cultures many researchers believe exist in the wild, providing further evidence chimpanzees and humans shared...

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