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Tag: "cut" at biology news

T-ray breakthrough could make detecting disease far easier

... T-rays very well, if a series of tiny grooves was cut into the wire, it would do so much more effectively. If such a corrugated metal wire is then tapered to a point it becomes possible to very efficiently transport radiation to a point as small as a few millionths of a metre across. This might, fo...

A sweet step toward new cancer therapies

...ed rings with lots of branches, like trees. If you cut off a branch, you don't know which part of the tree it came from." The trick is to make breaks that cut across the ring structures, rather lopping off branches. By using metals as charge carriers, the res...

Widely used hepatitis B drug spurs HIV drug resistance

...tions less than a tenth of what is used in humans, cut the number of newly infected cells in half. However, at increasing concentrations, the drug had no greater impact on suppressing HIV replication. HIV is a virus renowned for its ability to change form and thus evade or develop resistance to therapi...

Scientists identify specific enzymes that make meningitis hard to fight

...amined two enzymes from a family that are known to cut the DNA during its repair. To our surprise we disc...e meningitis bacteria, one of the enzymes does not cut the DNA. Instead, it removes damaged DNA ends that prevent the DNA from being remade during the repa...

Targeting tumors the natural way

...ed together. These weak "multivalent" interactions cut down on cases of mistaken identity, because if the agent contacts the wrong cell type, it can be easily displaced. The team got the idea to mimic this process from efforts to transplant pig organs into primates. The surfaces of most mammalian and ...

MicroRNA helps prevent tumors

...s, the protein-producing part of the Hmga2 gene is cut short and replaced with DNA from another chromosome. Biologists have mostly focused on the shortened protein as the possible reason that the cells with this DNA swap became tumors. But this DNA swap removes not only the gene's protein-producing regi...

Motor protein plays key role in connecting neurons

...t make the proper connections. When researchers cut off myosin X's motor ?which they believe happens i...he middle and this typically large molecule can be cut down to a small molecule that actually inhibits axon growth function," Dr. Xiong says. She suspec...

New cigarette designs don't offer lower predicted cancer risks

...rinking 10 beers a day, but says they are going to cut down to 9." Such findings could lead to tightened restrictions on how tobacco companies market their products. Legislation is now being considered in Congress on whether and how the U.S. Food and Drug Administration should be allowed to regulate c...

Eating less salt could prevent cardiovascular disease

People who significantly cut back on the amount of salt in their diet could red...ely 25% - 35% alongside a control group who didn’t cut back on their salt intake. Detailed information about cardiovascular and other health problems w...

No-scalpel vasectomies by skilled surgeons may speed recovery

... birth control in which a duct known as the vas is cut or tied, has traditionally been performed by making an incision in the skin of the scrotum. Cutting or tying the vas, which carries sperm from the testicles, leaves a man infertile. Instead of making an incision, the no-scalpel technique uses a s...

Dual gene therapy suppresses lung cancer in preclinical test

...experiments first showed that the gene combination cut the number of viable cells in four lines of human non-small cell lung cancer by 70 to 80 percent 48 hours after treatment while leaving a control group of normal cells unaffected. The cancer cell lines treated with the gene combination had 2 to 3 tim...

OHSU lab finds meth receptor that could lead to therapy

...rough this system," Grandy said. "We have our work cut out for us." ...

New molecular pathway could reveal how cells stick together

...ied a specific protein, called ninjurin, that gets cut by MMP. Now she is working out the interplay betwe... anchored to the surface of cells, but after being cut by MMP, a ninjurin segment travels to adjacent cells and signals them to alter their adhesive state....

Research finds music training 'tunes' human auditory system

... Yet music classes are often among the first to be cut when school budgets get tight. That's a mistake," says Kraus, Hugh Knowles Professor of Neurobiology and Physiology and professor of communication sciences and disorders. "Our study is the first to ask whether enhancing the sound environment -- in...

Tropical forests -- Earth's air conditioner

...Caldeira believes it would be counterproductive to cut down forests in snowy areas, even if it could help to combat global warming. "A primary reason we are trying to slow global warming is to protect nature," he explains. "It just makes no sense to destroy natural ecosystems in the name of saving natura...

BMI not accurate indicator of body fat

...u're an athlete or a 75-year-old man, all the same cut points are used." "BMI should be used cautiously when classifying fatness, especially among college-age people," said Jim Pivarnik, an MSU professor of kinesiology and epidemiology. "It really doesn't do a good job of saying how fat a person reall...

Rapid response was crucial to containing the 1918 flu pandemic

...few days after the first local cases were recorded cut peak weekly death rates by up to half compared with cities that waited just a few weeks to respond. Overall mortality was also lower in cities that implemented early interventions, but the effect was smaller. These conclusions--the results of systema...

Get a whiff of this: Smell test could sniff out serious health problems

...l, the size of the sniff when detecting an odor is cut in half. For someone who cannot detect odor, the size of the sniff for just air and the size of the sniff for an odor are the same.? In humans, Frank says the sense of smell is one of our less robust senses. He says it’s more susceptible to harm be...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...ple step of using quieter pavement materials could cut road noise in half in the main entrance of the Florida Everglades. Blomberg ( npc@nonoise.org ) notes that noise in national parks follows the same consistent pattern associated with other modern noise: the invention of new noise sources, the growth...

DNA repair proteins monitored at double-strand break

...roken ends. Double-strand breaks are ruptures that cut completely across the twisted, ladder-like structure of DNA, breaking it into two pieces. Using a technique developed specifically for this project, the St. Jude researchers could determine when repair proteins arrived at or around the DNA break an...

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