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Tag: "separates" at biology news

Purdue proves concept of using nano-materials for drug discovery

...anic porous membrane - in this case alumina, which separates the reaction chamber from a solution. The pores in this membrane are nanometer in scale, so they do not allow proteins to readily pass through the membrane but will allow smaller molecules to pass. "This allows us to do separation right in the react...

Scientists discover unique microbe in California's largest lake

...mjumped across the vast evolutionary distance that separates theproteobacteria and cyanobacteria, and switched places with the portionof the gene that had originally been inherited from the cyanobacterialparent."This finding shows that even this popular evolutionary chronometer canbe a mosaic of genetic inform...

Nanoscale Diagnostic Sets Sights on Alzheimer's

...articles sandwich the biomarker targets. A magnet separates the sandwich complexes from the rest of the sample. The complexes are then heated to release the DNA bar codes, which are then measured by an extremely sensitive detector. Each DNA piece greatly increases the sensitivity of the test and its potential...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...w, 700-mile-long stretch of the Pacific Ocean that separates the Mexican mainland from the Baja California Peninsula. The area is a hotspot of marine biodiversity and one of Mexico's most important commercial fishing centers. "Biological productivity in most of the world's oceans is controlled by the supply o...

Chimp genome reveals a retroviral invasion

...imp -- even though slightly more evolutionary time separates gorilla and chimp than macaque and baboon. When a retrovirus reproduces, identical copies of LTR sequences are created on either side of the retroviral element; the divergence of LTR sequences within a species can be used to estimate the age of an i...

Fluorescing lab worms signal longer life spans

...evels in the nematodes and a pneumatic device that separates them into groups with short pulses of air was used during the study. One of only six such instruments in the United States, the machine can sort about 30 worms per second, Johnson said. Genetic testing on both the bright and dim worms revealed that ...

Cells from amniotic fluid used to tissue-engineer a new trachea

...atic hernia (CDH), or a hole in the diaphragm that separates the lungs from the visceral organs. If the hole is large enough, the stomach and other visceral organs can end up in the chest cavity, crowding the lungs and stunting their growth. Using mesenchymal stem cells from amniotic fluid, Fauza's team engin...

Picking particles faster than one at a time

... cases, an additional procedure called "pinch-off" separates candidates that aren't actually connected and discards those that are. Boxes are drawn around the final picks and their image quality is enhanced by an operation called "shrink-wrapping." If a portion of an adjacent particle protrudes into the box,...

Vital ocean prey play active role in environment

...ing a highly seasonal environment. Nicol's model separates the species into different life stages: larvae, juveniles, gravid females, and other adults. These groups are believed to remain geographically separate. In summer, adults remain close to the edge of the continental shelf, which allows them access to...

BGSU biologist trying to crack microscopic code

... lets the butterflies through." A short distance separates the outer membrane and the rest of the organism. How the bacteria maintain their barrier when it's physically removed from the rest of the cell, and thus separated from its energy source, is where his interest lies. "The barrier is not self-sustain...

Gene screen for breast cancer better than pathologist's 'eye'

...a Sukumar, Ph.D. and Mary Jo Fackler, Ph.D., first separates cells from fluid, then sifts through the cells' DNA for chemical tags on certain genes associated with cancer. Reporting in the June 1 issue of Clinical Cancer Research, the scientists say they have tested their screening tool on breast fluid, in s...

Rhesus monkeys in Nepal may provide new alternative for HIV/AIDS research

...geographic barrier of the Himalayan Mountains that separates Nepal and India from China. To facilitate the use of rhesus macaques in research while ensuring the conservation of Nepal's naturally occurring rhesus populations, the Nepali government enacted a policy in 2003 stipulating that only captive-bred ani...

Spelling out cancer on the nanoscale

...c mouse models. The nano-fluidic system physically separates the proteins in very small capillary tubes and then uses antibodies for protein detection. It was also tested on human lymphoma samples. In previous work, the Felsher group had shown that inactivating MYC induces sustained tumor regression in ...

End of deforestation in view? Experts advance new way to size up global forest resources

...ieved the greatest gains. "The Forest Identity separates nations into classes of expanding and shrinking forest that clarify the causes of changing forest expanse, timber, biomass, and carbon," says lead author, Pekka E. Kauppi of the University of Helsinki, Finland. The co-authors are Jesse H. Ausubel, R...

Drug can quickly mobilize an army of cells to repair injury

...an be collected from the blood by a technique that separates them and concentrates them. They found that the cells maintain their function after freezing and so can be stored for future use. "It's possible that if a patient was scheduled to have a procedure that would damage blood vessels, such as angioplasty...

American scientist's research of life's first cells

...this case made of RNA) contained in a vesicle that separates the genome from the external environment. Chen describes how interactions between the RNA and the vesicle's membrane led to the emergence of certain basic cellular behaviors. For example, when the genome replicates inside a vesicle, osmotic pressure ...

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...y that breaks apart proteins into small fragments, separates them by size and identifies the fragments based on their mass - their size and weight. The process improves on previous techniques by breaking up proteins more gently and keeping chemical modifications like phosphorylation intact. Previous spectromet...

Progress toward artificial photosynthesis?

... to phenol, and in the end the highly desirable CO separates from the catalyst. "This could make novel, previously unknown chemistry of CO2 accessible," hopes Antonietti. "It may even be the first step in artificial photosynthesis."...

Tracking sperm whales and jumbo squid

...d the Sea of Cortez—a narrow stretch of ocean that separates the Mexican mainland from the Baja Peninsula. "The central Gulf of California is a uniquely advantageous location to study the behavioral ecology of sperm whales and their squid prey," the authors wrote. "Sperm whales are abundant year-round and a...

MIT model helps researchers 'see' brain development

...ructures, such as the “central sulcus,?a fold that separates the motor cortex from the somatosensory cortex. Yu applied a technique developed by Fischl to perform this alignment. The second step involves modeling the folds of the brain mathematically in a way that allows the researchers to analyze their ch...

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