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Tag: "noticed" at biology news

Understanding how bacteria communicate may help scientists prevent disease

...example often given is bioluminescence. Scientists noticed that once a population or colony of particular bacteria reached a certain size, the colony began to emit light. "Now many people realize that other important activities also depend upon a quorum, such as biofilm formation, releasing toxins, or becomi...

Pair of cancer genes found to drive both cell migration and division

...iddle, cutting the cell in half. The research team noticed that the two halves of a normal dividing cell looked and acted like two cells moving away from each other. "Essentially, the two halves are like migrating cells - PIP3 levels are high on the sides that represent the 'fronts' of what will be two new ...

15-year hunt finds cause of pseudothalidomide syndrome

...s might still be unknown. Colombian Hugo Vega had noticed an unusual number of patients with Roberts syndrome in the clinic at the University of Bogotá. Fairly quickly, he tracked down seven families with Roberts syndrome in two villages outside Bogotá. Four of the families share an 18th-century ancestor, h...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...ons - one in Norfolk and one Wiltshire - when they noticed a 48% decline in the number of females born at the Norfolk site. At both sites vole numbers had been monitored using small traps baited with apple and carrot during 2002 and 2003, voles being released after counting. However, Moorhouse and Macdonald ...

Master gene controls healing of skin in fruit flies and mammals

...terested in the healing of insect cuticle when she noticed lesions in the cuticle of certain fruit fly mutants. She suspected that the lesions were scar tissue resulting from the failure of the body surface barrier to develop properly. Confirming her suspicions, the mutant embryos turned out to be much more ...

New polysaccharide may help combat multidrug resistance in cancer

...hatak, of the Medical University of South Carolina noticed that small pieces, or oligomers, of a polysaccharide called hyaluronan were able to sensitize drug-resistant breast cancer cells to several different chemotherapeutic drugs. He believed that the polysaccharide oligomers were binding to a receptor for...

Scientists journey to southern Africa to unravel the secret world of elephant communication

... the University of Hawaii-Manoa, O'Connell-Rodwell noticed something about the freezing behavior of Etosha's 6-ton bulls that reminded her of the tiny insects back in the lab. "I did my master's thesis on seismic communication in planthoppers," she says. "I'd put a male planthopper on a stem and play back a...

Dead zone area in Gulf could be increasing, researchers say

...ch," DiMarco says. "If the physical conditions we noticed continue, it could mean an unusually strong hypoxic zone this year, and that's not good news." DiMarco said the team studied an area between Southwest Pass, La., and the Calcasieu ship channel. They were on the Gyre, a research vessel owned by Texas...

Wisconsin researchers identify sleep gene

...ife spans. Following the testing, the researchers noticed shaking in the flies' legs as the insects recovered from anesthesia. The observation led the team to focus on the Shaker gene, which produces this effect. Nevertheless, Shaker's main job in flies-and in its equivalent in humans--is to control the exc...

Scientists discover that host cell lipids facilitate bacterial movement

...ront of the moving bacteria." The researchers also noticed that Listeria movement slowed down when the bacteria were treated with molecules that inhibited PI3-kinase, proving that Listeria depend on PI3-kinase to move. "Our studies show that Listeria is capable of inside-out signaling," explains Dr. Southwi...

Falling ants glide back to trunk to avoid dangers of forest floor

...d off a few dozen ants that were attacking him and noticed their uncanny ability to land on the tree's trunk ..."I brushed them off the branch with my hand, and I noticed that maybe 20 or 30 of them fell in unison and then made this nice little cascade back to the tree t...

Bird Brains Show How Trial and Error May Contribute to Learning

...rain. A postdoctoral fellow on another project had noticed greater and more variable brain activity when the finches were singing to themselves compared to when they were serenading females. Kao wondered whether she could cause changes in bird song by manipulating this region. Learning takes some time, so K...

New RNA polymerase discovered in plants

...pecies. But then along came Pol IV. Pikaard first noticed the evidence for a fourth polymerase when analyzing gene sequences after Arabidopsis thaliana , the "laboratory rat" of the plant world, was sequenced in 2001. It originally looked to him like an alternative form of either Polymerase I (Pol I), which...

Scientists discover unique microbe in California's largest lake

...ood as a graduate research associate when he first noticed theorganism's unusual lime-green color."I knew right away there was something unusual about itsphotochemistry," Miller recalls."We purified the pigments from the strain and saw that they were verysimilar to those known from a species of blue-green al...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...the foxes were driving toward extinction, Byrd had noticed the differences between islands with and without foxes and speculated that nutrients might play a role. "He had these interesting ideas about foxes and birds and nutrient chains, and I thought we should do some studies to see how robust the idea is,...

First-ever Compounds To Target Only Metastatic Cells Are Highly Effective Against Breast, Prostate, And Colon Cancers

...avenue of research opened up when Dr. Huang's team noticed that the Streptomyces bacterium -- the bug that gi...ffected by the analogues, and the researchers also noticed that malignant cells failed to grow tiny "antennas," called lamellipodia, another crucial step in th...

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