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Tag: "backs" at biology news

Study shows lizard moms dress their children for success

...ggs, creating either lengthwise stripes down their backs or bars stretching from side to side. Whether they get stripes or bars depends on the genes for other traits. "This is the first example in which exposure to the mother's hormones changes such a fundamental aspect of appearance. Even more exciting...

Trying to control pain can be a double-edged sword, say scientists

... volunteers were given an electric stimulus to the backs of their hands and told that they could stop the pain at any point. In the second stage, they were told that the decision to stop the pain was out of their control and could only be stopped by a person or computer outside the room. Using one of th...

Distinguishing friend from foe in the battle against cancer

...mising as these drugs are, cancer cells with their backs against the wall have the tendency to fight back. A major goal of cancer research is to frustrate these acts of cellular desperation. In a forthcoming issue of Cancer Cell, investigators at the Salk Institute for Biological Studies uncover one means...

Psst! Coffee drinkers: Fruit flies have something to tell you about caffeine

... The researchers then flipped the flies onto their backs and looked at the color of their bellies to see what they ate - blue indicating a preference for eating sugar, red indicating a preference for bitter caffeine, and purple indicating no preference. Flies missing the critical taste receptor protein Gr...

MIT engineers probe spiders' polymer art

...nut-sized and -shaped protuberance on the spiders' backs containing their silk-producing glands and spinnerets. Spiders don't actually spin ("spinning" refers to the age-old art of drawing out and twisting fibers to form thread); instead, they squirt out a thick gel of silk solution. (One teaspoonful can...

Orange, grapefruit juice for breakfast builds bones in rats

...t 40 different ones, Patil cautioned. "This study backs up our thoughts about the value of citrus," Patil said, noting that until researchers completely understand the interaction of grapefruit juice and certain medications, a person should ask a doctor. "In general, people should eat a variety of all t...

Nanotechnology may find disease before it starts

... anesthetized the animals and placed them on their backs on a warm imaging table. Rosol said that Liu and her team are working on creating biodegradable nanoparticles. For the purposes of this study, however, the researchers wanted to use a hard substance, silica, to see if their idea would work. The stro...

Scientists turn tobacco against cancer

...hey grafted human colorectal cancer cells onto the backs of nude mice ?mice stripped of their immune systems, and subsequently injected the animals with the plant-derived antibodies. Then they watched for tumor growth for as many as 40 days. The researchers found that tumor growth was inhibited in a simil...

High fidelity keeps human DNA assembly line humming

... up properly with DNA, the system stalls ?and even backs up to correct the error. "We're able to show how an error will be sensed and corrected," Burton said. "The quality control system checks NTP loading several ways. If it doesn't match the criteria, it gets booted out." In addition to better understa...

A little stress gives beneficial oomph! to immune system

... implanted tiny sponges underneath the skin on the backs of all of the animals, including the mice in the non-stressed group. These disc-shaped sponges were about the size of a grain of rice. Sponges were removed from some of the mice six hours after implantation and from the rest of the mice one, two or ...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...ish -- with three bony spines poking up from their backs -- live both in the seas and in coastal fresh water habitats all around the northern hemisphere. Sticklebacks are enormously varied, so much so that in the 19th century naturalists had counted about 50 different species. But since then, biologists h...

Researchers trace evolution to relatively simple genetic changes

...ish -- with three bony spines poking up from their backs -- live both in the seas and in coastal fresh water habitats all around the northern hemisphere. Sticklebacks are enormously varied, so much so that in the 19th century naturalists had counted about 50 different species. But since then, biologists h...

Experiments provide proof of how traveling in groups protects insects

...s -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne showed experimentally that band formation indeed boosted insect survival. Sword is a research ecologist with the U.S. Dep...

Experiments provide proof of how traveling in groups protects insects

...s -- each weighing less than half a gram -- to the backs of Mormon crickets in northeastern Utah and northwestern Colorado, Drs. Gregory A. Sword, Patrick D. Lorch and Darryl T. Gwynne showed experimentally that band formation indeed boosted insect survival. Sword is a research ecologist with the U.S. Dep...

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