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Tag: "inside" at biology news

Paramecia adapt their swimming to changing gravitational force

...s placed a vial with pond water and live paramecia inside a high-powered electromagnet at the National High ...an plain water is, so the magnetic field generated inside the vial "pulls" harder on the water than on the cells. If the field is pulling down, the cells floa...

Molecular mechanism provides intra-cellular traffic signal

...r trafficking, because anything that goes from the inside of a cell to the outside, or from outside to inside, uses this process," Segev said. "Malfunctioning of this pathway can cause a variety of human diseases. For example, problems in insulin secretion or presentation of insulin-receptors on the cell me...

Three-dimensional, miniature endoscope opens new diagnostic possibilities

... first to allow three-dimensional imaging of areas inside the body," says Guillermo Tearney, MD, PhD, of the MGH Wellman Center, the report's senior author. "Its ability to go places that other imaging tools cannot reach opens new possibilities for medical diagnosis and eventually treatment." Standard mi...

Bacteria that use radiated water as food

...esent paper learned of a new water-filled fracture inside a South African gold mine near the Johannesburg metropolitan area and viewed it as an opportunity to study subsurface rock uncontaminated by human activities. Lin and others in the research team traveled to the mine and descended the hot, gas-choked ...

History-hunting geneticists can still follow familiar trail

... the nucleus of our cells, mtDNA is unlike the DNA inside the nucleus of a cell that contains genes from both of our parents -- in people and animals mtDNA is exclusively passed from mothers to their children. For humans, this means that all of the mtDNA in our cells are copies of our mothers' mtDNA, wh...

A new understanding of how cells defend themselves against bacterial pore-forming toxins

...ammasomes act like a sort of roving security force inside the cell, detecting a variety of danger signals such as bacterial RNA or bits of bacterial flagellin. The inflammasomes join together and activate a protein, caspase-1, that in turn triggers an inflammatory response. Van der Goot and her colleague...

New biochip helps study living cells, may speed drug development

... -- roughly the size of a dime -- cells are sealed inside 16 pyramidal pores, analyzed, and then can be removed intact. Since the technology does not kill the cells, it could be used to screen and identify different crop lines, Porterfield said. "For example, let's say you were interested in developing c...

High hourly air pollution levels more than double stroke risk

...cerebral haemorrhage - where a blood vessel bursts inside the brain - for the warmer months between April and September. This showed that high hourly rates of particulate matter (in excess of 200 ug/m3) around two hours before death were associated with a more than doubling in the risk of death from a blee...

Like a snail through the intestinal canal

...t. There is a layer of slime, called mucus, on the inside of the large intestine (colon). The robots, as they move forward under their own power, ignore this layer of mucus and try, if possible, to suck or grab on to the intestinal wall, which results in the walls being stretched and the patient feeling pai...

New evidence of early horse domestication

...discovery, consisting of phosphorus-enriched soils inside what appear to be the remains of horse corrals bes...iversity of Pittsburgh collected soil samples from inside the fenced area and outside the settlement. The samples were analyzed for nitrogen, phosphorus, pota...

Researchers add to understanding of how brain cells communicate

...harged particles, or ions, between the outside and inside of cells. Ions also modify how receptors work. In this paper, Johnson and Qian studied the effects of ions on receptors and found them to vary between different types of receptor molecules. They used computer modeling to show that variation in how io...

Scientists find a key to immune system's ability to remember

...ogens like measles virus and HIV, agents that hide inside cells. Lck is important in helping "naive" T cells -- those cells that have never been exposed to a particular pathogen -- capture the receptor template of the invading agent and store it for future reference. Among the millions of naïve T cells, ...

Better sludge through metagenomics

...gement, accumulating massive amounts of phosphorus inside their cells. "Engineers and microbiologists have been trying for 35 years to grow this microbe, with no success," said Trina McMahon, Assistant Professor, Department of Civil and Environmental Engineering, University of Wisconsin, Madison, and one...

MIT nanoparticles may help detect, treat tumors

...e technique allows nanoparticles to group together inside cancerous tumors, creating masses with enough of a...re are gaps in the endothelial cells that line the inside of the blood vessels. The nanoparticles can slip through these gaps to enter the tumors. Once insid...

Jumping gene could provide non-viral alternative for gene therapy

...han 20 years because of their adeptness at getting inside cells and inserting themselves in DNA. But efficiency comes at a price. Gene therapy trials have been halted because of major complications, including deaths. As examples, one patient died because of his immune response to an adenovirus and three chi...

Fire ant-attacking fly spreading rapidly in Texas

...re ants without pesticides. The fly larvae develop inside the ants and kill their host. Dr. Ed LeBrun, a r...rn the ants to their property carrying phorid eggs inside them. "People accidentally move fire ants around all the time," says Gilbert, "and now they can h...

Alarming decline in Nepal's rhinos and tigers in former Maoist stronghold

...nd other carnivores. Virtually all the guard posts inside the Babai valley were found to be destroyed by the...gin. One new antipoaching post will be established inside of Bardia as soon as possible, while arrangements are being made to create new antipoaching posts ar...

Targeted virus compels cancer cells to eat themselves

...round the material to be consumed, then everything inside is digested. Kondo and colleagues showed that hTERT-Ad (short for human telomerase reverse transcriptase promoter regulated adenovirus) infected the glioma cells and induced autophagy by inactivating a molecular pathway -- the mammalian target of r...

Finding the right mix: A biomaterial blend library

... will a biomaterial on the lab bench actually work inside the human body? Will a patient accept the new material or suffer an inflammatory response? And can that material survive in a human's complex system? To tackle such questions, researchers at the National Institute of Standards and Technology (NIST)...

3-D ultrasound scanner could guide robotic surgeries

..., the researchers engineered probes that could fit inside catheters threaded through blood vessels to view t...oting the precise location of an artificial lesion inside a type of artificial organ, or "phantom," commonly used for testing imaging technologies. The resear...

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