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Tag: "samples" at biology news

Small species back-up giant marsupial climate change extinction claim

...ts to document ecological and sediment data. "Our samples show that species dependent on habitats such as woodlands and vine thickets dominate the lowest section of the trench, which dates to around 45,000 years ago," says Mr Price. "Other younger sections have a mixture of both large and small species tha...

Genetically Modified Natural Killer Immune Cells Attack, Kill Leukemia Cells

...rge populations of NK cells, the team started with samples of blood containing a variety of different immune system cells. They placed this sample into a dish containing a type of human leukemia cell called K562. Campana's team genetically modified the K562 cells so they carried on their surfaces many copies...

UNC launches study of liver injury caused by drugs

... Researchers will use DNA analysis based on blood samples to identify possible genetic risk factors for such liver injury. "Once a drug has been associated with severe liver injury, physicians are understandably hesitant to prescribe it, even if it may provide the best benefit for that patient," said Dr. M...

Study reveals new technique for fingerprinting environmental samples

...ures of the genes alone in terrestrial and aquatic samples can accurately diagnose the health of the sampled ...n abundance of genes involved in photosynthesis in samples collected from shallow water. These differences in the abundances of genes involved in particular fu...

Leprosy microbes lead scientists to immune discovery

...e. The researchers isolated immune cells in blood samples from healthy people and exposed the cells to a component of mycobacteria. The large white blood cells known as monocytes rapidly differentiated into the two distinct cell types, forming the body's emergency response to the detection of foreign bacter...

Different microarray systems more alike than previously thought

...shington, D.C./Baltimore area were given identical samples of RNA -- DNA's cousin -- to analyze using a microarray platform of their choice. Five laboratories used commercially available Affymetrix microarrays, and five labs used either of two more flexible systems. The Hopkins researchers noted that in the...

NIH Researchers Discover How Insulin Allows Entry of Glucose Into Cells

...m. Eventually, the researchers hope to obtain cell samples from volunteers who have been diagnosed with type 2 diabetes and insulin resistance. ...

Biomarkers isolated from saliva successfully predict oral and breast cancer

...5 percent by using only the salivary transcriptome samples and 88 percent by using only serum transcriptome samples for oral squamous cell carcinomas," said Wong. "For oral cancer, salivary transcriptome has a slight...

Anammox bacteria produce nitrogen gas in oceans' snackbar

... fluorescence microscopy and DNA analyses of water samples was used to proof the abundance of anammox bacteria in the Atlantic Ocean. The discovery of anammox bacteria in the open ocean has major consequences for our understanding of the global nitrogen cycle. Models of global nitrogen budgets, which play an...

Study reveals dramatic difference between breast cancers in US and Africa

...wship in Olopade's laboratory, to gather the tumor samples from three regions of Nigeria, and later from Sene...e now have the world's largest collection of tumor samples from Africa," said Olopade. "Francis did most of that over the course of one year. That should give ...

Doctors closer to using gene analysis to help trauma patients

...medical professionals can collect blood and tissue samples from patients, process them at different institutions and get consistent results,?said Henry Baker, associate director of the UF Genetics Institute and interim chairman of molecular genetics and microbiology. “For any tool used in clinical medicine, ...

Norovirus found to cause traveler's diarrhea

...r other countries. The researchers examined stool samples from 34 individuals who experienced traveler's dia...lic Health, noted that 11 Norovirus-positive stool samples also were positive for E. coli, a leading bacterial cause of traveler's diarrhea, thus indicating th...

Man-made wetland's effectiveness similar to natural marsh

...land for two years, collecting and analyzing water samples twice each month. They tested the samples for concentrations of phosphorus, nitrates and several other chemicals. The researchers also gather...

The biggest family tree ever

...ousands of years back in time by analyzing genetic samples from at least 200,000 people all over the world. ...project is doing field research and collecting DNA samples from indigenous peoples throughout the world. The field component of the project is underwritten by ...

Oldest cranial, dental and postcranial fossils of early modern European humans confirmed

...f Nature. "The dating results document that these samples are as old as we thought they should be," agree Ma...nthropologists involved in this study. "The Mladec samples date to around 31,000 years ago," reports Eva Maria Wild from the VERA (Vienna Environmental Researc...

Tendency to hair loss inherited from the mother

...h several men were affected by hair loss. In blood samples taken from the volunteers they then looked for candidate genes ?and eventually discovered them: in their initial step they succeeded in narrowing down the search to a series of areas on various chromosomes. In an area where the largest contribution w...

Stanford gut check shows diversity of intestinal ecosystem

... three research subjects, the researchers analyzed samples from six different anatomical sites inside the lar... bacteria are from humans. The team also used the samples to examine how microbial communities differ among locations within the intestine as well as among di...

Affymetrix Launches New Globin-Reduction Kits and Protocol Developed with PreAnalytiX

...od, thus enabling clinical research and collecting samples for multi-site clinical trials." About PreAnalytiX GmbH: The purpose of PreAnalytiX GmbH, a Swiss-based joint venture between BD (Becton, Dickinson and Company) and QIAGEN N.V., is to develop, manufacture, and market integrated systems for the coll...

Stealth Worms May Improve Insect Pest Control

...meet local pest management goals. Then they gather samples from soil or other habitats for testing in the laboratory. The nematodes are accurately identified and analyzed using traditional morphology (structure and function) techniques and through molecular screening, including PCR (polymerase chain reaction...

Currents could disrupt ocean food chain

...king that up," he added. "Deep ocean sediment core samples show pebbles from land delivered by the floating icebergs." Schmittner said scientists also have examined ice cores from Greenland and measured isotopes that show rapid temperature changes, which coincide with changes in ocean nutrient concentration...

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