Tag: "sample" at biology news
Scientists report tissue engineering success
...ssels for elderly patients. The researchers took a sample
of discarded vein from five elderly men after they had completed coronary bypass surgery. They isolated blood vessel cells from the tissues of each of the patients. They then infected some of the cells from each patient with a virus carrying an enzym...
Recurrent miscarriages: Could prednisolone reduce the occurrence of this distressing condition?
...and then the researchers took a second endometrial sample
by biopsy on day 21. "We found that the prednisolone significantly reduced the number of uNK cells in the endometrium. The women had an average of 14% before treatment, with the highest percentage being 72%, and after treatment the average dropped to...
Manatee eyes could be window to health status
... Homosassa Springs State Park. She is coordinating sample
and data collection for the UF veterinary college as part of the project. "We suspect that manatees' thick, mucusy tear film likely contains proteins, such as antibodies, that would prevent bacteria and other pathogens from causing disease," Harr sai...
Researchers grow stem cells from human skin
...d Soker. "The cells can be obtained from any small sample
of human skin." Next, Atala's research team hopes to test the function of the tissue that was created from the stem cells. "We've proved that the cells can be used to engineer tissues consistent with bone, muscle and fat when implanted in animals; no...
Aerobic exercise helps find genetic regions linked to prediabetes
...se in this study, we were able to analyze a unique sample
and directly measure insulin secretion and action. What we found is consistent with other kinds of studies of type 2 diabetes traits, and the replication of findings from independent studies and samples, although difficult, is important for establish...
New chem-bio sensors offer simultaneous monitoring
...mean that the structure and activity level of your sample
has changed and you're not looking at the same condition of your sample
anymore." Using an AFM as the base, researchers added micro and nano-electrodes into the tip. This ...
U-M scientists discover identifying markers for primitive blood-forming stem cells
...nd it takes a high level of skill to obtain a pure sample
of HSCs," Kiel says. "We showed that using just tw...ion of CD150+, CD48- and CD244- markers produced a sample
that was highly enriched for HSCs. These cells were extremely rare fewer than one out of 10,000 who...
North & South American researchers find architectural abnormalities in T. cruzi ribosome
...tallize and damage the ribosomes. Then, the frozen sample
is imaged with an electron beam in the transmission electron microscope. A CAT scan takes readings of a single body from different angles to reconstruct its three-dimensional images, but the microscope catches hundreds of ribosomes at different angl...
Environment more than genes determines child's social aggressiveness
...tigated the origins of social aggression through a sample
of 234 six-year-old twins. The researchers had the children's peers and teachers rate their physical and social aggression. Overall, researchers found, genetic factors could explain only a small extent of social aggression (approximately 20 percent);...
Environment and genetic influences play different roles in boys' and girls' gender-role behavior
...longitudinal study that comprises a representative sample
of all twins born in England and Wales in 1994, 1995, and 1996. To disentangle genetic from social-environmental influences on gender-role behavior, they used the classic twin design, comparing the similarity of identical twins, who share their entir...
Discovering an ecosystem beneath a collapsed Antarctic ice shelf
...ntinuing analyses of the area as ecosystem experts sample
the site. The international expedition was there on a U.S. Antarctic Program cruise to study the sediment record in the area vacated by the former ice shelf. The crew recorded a video of the seafloor at the end of its mission and only later discovere...
New technique rapidly detects illness-causing bacteria
... equipment: Technicians take a piece of DNA from a sample
and add enzymes that make many copies of the DNA. ... the presence of scarlet fever-causing bacteria, a sample
of rRNA is placed in a test tube with two of the manufactured probe DNA sequences, designed specific...
Space matters: Estimating species diversity in the fossil record
...hic areas. After correcting for possible biases in sample
size that might influence the number of species, Barnosky et al. found a strong species-area effect. These results, they argue, suggest that many fluctuations in diversity seen in fossil analyses actually arise from the species-area effect and a...
World-record magnet to pull in scientific breakthroughs
...bore is the space within the magnet that holds the sample
being tested. The larger the bore size, the larger the sample
-- and the greater the range of scientific experiments that can be conducted. "The commissioning of...
Evolution of taste receptor may have shaped human sensitivity to toxic compounds
...ing compounds. By analyzing sequences from a large sample
of individuals representing 60 human populations, the researchers found evidence that specific variants of the receptor gene have been strongly favored in the early stages of human evolution. Employing additional gene sequence analyses, the authors e...
Fragile X-related disorder difficult to diagnose; guidelines suggested in new study
... FXTAS after a genetic test using DNA from a blood sample
showed that she carried the FMR1 gene. Her symptoms became mild again after chemotherapy stopped. "About 1 in 259 women carry the FMR1 gene, but FXTAS is rarely reported in women," said co-author John P. O'Dwyer, MRCPI, of St. Vincent's University Ho...
California Institute researchers unveil computer graphics innovations at SIGGRAPH
...rithms," in the spring. "This makes it possible to sample
products of high-dimensional functions even if the product of the two functions in itself is too memory consuming." One application of the new sampling technique is rendering of objects with measured BRDFs illuminated by complex distant lighting. "Ou...
Forests in the clouds
...ch Canadian music and singing. They will provide a sample
of the music and storytelling that has been part of the cultural heritage of French Canada for centuries. Dr. Cristin Samper, Director of the Smithsonian Museum of Natural History holds Columbian and U.S. citizenships and is fluent in both Spanish ...
Customized gene chip provides rapid detection of genetic changes in children's cancer
... ordered selections of genetic material upon which sample
material can be tested. When DNA bases from a sample
bind to complementary sequences on the microarray, they cause fluorescent tags to shine under laser ...
Quantum cascade lasers key to handheld gas and liquid sensors
...ide to date." Gas sensing done this way requires a sample
of only one milliliter of gas, compared to few hundreds of milliliters for other techniques using regular multi-pass gas cells, he added. One of the most promising applications for this technology is breath diagnostics, said Mizaikoff. "A lot of dise...
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