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Tag: "then" at biology news

Tundra disappearing at rapid rate

...ike it waited until conditions were just right and then it decided to get up and run, not just walk." D...ore sunlight than the tundra. This light energy is then re-emitted to the atmosphere as heat. This sets up a "positive feedback," the same process that is a...

Stanford-led study closes in on genes that may predispose some people to severe depression

... variations that affect one's risk of depression, then we would be able to understand what type of gene is it, what it does in the brain and by what mechanism it could make one more or less predisposed to depression." Knowing more about which genes are the major factors causing a predisposition fo...

Heart failure: Intervention possibilities from imaging programmed cell loss

...tein that binds to dying cells, said Hofstra. They then used nuclear imaging that produces three-dimensional computer-reconstructed images to reveal information about both structure and function to measure the amount of annexin A5 absorbed. Annexin A5 bound to the damaged heart muscle. "We discovered that...

BMI not accurate indicator of body fat

...late BMI in more than 400 college-age people. They then used a standard method of measuring body fatness and found that BMI was not providing an accurate portrayal of the amount of fat a student had. ...

Sandia researchers take new approach to studying how cells respond to pathogens

...egorized and understood. Computational modeling is then used to develop network models from experimental data and predictive modeling generates hypotheses to be tested next. Singh says using an integrated microfluidic platform sets Sandia apart from the rest of the world. Sandia researchers have been w...

2 brains -- 1 thought

... investigate the structure of a system in order to then draw conclusions about its function. Memmesheimer and Timme now took the reverse perspective. "For some simple networks we know the activity dynamics, that is, their function, but not their exact structure," explains Memmesheimer. "Any given dynamics...

Paper challenges 1491 Amazonian population theories

...ons to collect core samples from ancient lakes. He then analyzes those samples for pollen and charcoal and thus is able to conclude with a high degree of accuracy the extent of human settlement in that region. "What we do say is that when you start to look away from known settlements, you may see very ...

Jefferson scientists find rabies-based vaccine could be effective against HIV

...they gave the animals an initial vaccination, they then tried two different immune system boosts, but didn’t see enhanced immune responses. They then developed a new vector, a viral surface protein from another virus, vesicular stomatitis virus (VSV)...

Gut research yields new anti-cancer approach

...nd beta tubulin, which pair up to form a chain and then wind into a helix. The current studies found that high-dose PPARgamma inhibitors reduced levels of alpha and beta tubulin by 60 to 70 percent. Also described in the publication are studies where PPARgamma inhibitors killed tumor cells in mice without...

Red flag for repetitive stress injuries identified for first time in humans

.... "If the injury to the tissues can be halted, then hopefully long-term damage and impairment can be avoided," said Barbe, also an associate professor of physical therapy. Employers and workers know the dramatic impact of RMIs, which cause pain, loss of function and close to a third of missed workd...

Glucose triggers brain cell death in rats after hypoglycemic coma

...ed. This was a real surprise." The researchers then discovered that oxidative stress and neuron death were prevented when the rats were given an inhibitor of NADPH oxidase, indicating a key role for this enzyme. "It is well-established that mitochondria can be a source of oxidative stress," says ...

Row over study puts Korea's scientific community under scrutiny again

... was published by Korea University in May 2003. He then submitted this as a paper to the Korean Journal of Obstetrics and Gynaecology in July 2003 with five additional names, including Sook Hwan Lee. But his surprise turned to shock when, in December 2005, he saw a similar paper in Fertility and Steril...

Scientists identify molecular cause for one form of deafness

...rate. These vibrations stimulate hair cells, which then trigger nerve impulses that are transmitted to the brain. Researchers have now learned that mutations in a protein called espin can cause floppiness in tiny bundles of protein filaments within the hair cells, impairing the passage of vibrations and...

Despite their heft, many dinosaurs had surprisingly tiny genomes

...bone cell and genome size among living species and then used that new understanding to gauge the genome si...rds suggest after this shrinking, theropod genomes then stabilized in size for hundreds of millions of years, a process that continues in modern birds. "...

Scientists find genes involved in the battle between Hessian flies and wheat

...ism in resistant plants stresses the larvae, which then fight back, he said. This is confirmed by the Hess...Hessian fly larval digestive system. These poisons then disrupt the insects' gut function. "The larvae probe the plant to open a sustained feeding s...

Action video games sharpen vision 20 percent

...bols—a sort of electronic eye chart. Students were then divided into two groups. The experimental group played Unreal Tournament, a first-person shoot-'em-up action game, for roughly an hour a day. The control group played Tetris, a game equally demanding in terms of motor control, but visually less compl...

Researchers identify gene involved in dog size

...lymorphisms (SNPs), in the IGF-1 gene. Researchers then narrowed the field of SNPs associated with small size by SNP genotyping in and around the IGF-1 gene in 463 Portuguese water dogs. A similar analysis was done using 526 dogs from 14 small breeds and nine giant dog breeds. Ultimately, the research...

Navigable nanotransport

...nd and close off to form hollow spheres, which can then be filled with guest molecules. The size of the spheres is very uniform and depends largely on the solvent in which the linking reaction takes place. The researchers used this method to produce capsules with diameters ranging from 50 to 600 nm. Th...

Major gene study uncovers secrets of leukemia

...me fully mature B lymphocytes," Downing said. "And then the body would recognize them as defective B lymphocytes and destroy them." ...

Researchers learn what sparks plant growth

...to feed over nine billion people by the year 2050, then understanding the basic mechanics of plant growth is required," said Chory. "This knowledge will ultimately lead to our ability to increase yield, while decreasing the need for fertilizer and pesticides."...

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