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Tag: "arrived" at biology news

A surprising pair of proteins help make healthy eggs

...that springs from granulosa cells. The scientists arrived at their findings by creating two matched rat cell lines of ovarian granulosa cell origin. In the experimental line, the level of TAF4b was increased. Berkeley researchers compared these lines and were able to identify the cooperative role of TAF4b a...

New drug could reduce tissue damage after heart attack

...cks. "The drug would be given as soon as patients arrived in hospital. If effective, it would reduce the amount of damage in the heart, thus limiting both early mortality and the size of the scar left in the heart. "Provided adequate support is available, it should be possible to undertake clinical trials...

Taking a bite out of a fellow worker helps wasps recruit new foragers

...were removed for at least two hours and until none arrived for at least one hour of continuous monitoring. "The rate of foraging slowed down and stopped completely, placing stress on the colony because materials the colony needs, primarily food, are not coming in. So the colony needs to recruit new workers...

MRSA use amoeba to spread, new research shows

...as pathogenic long before humans and other animals arrived on the evolutionary scene. Even today, it has no known animal host". "The most likely reason is that Legionella and many pathogens learned their pathogenicity after sparring with single-celled organisms like amoeba for millions of years. Because o...

The secret love life of plants

...e and even grow into a female partner. Once it has arrived there, the single sperm cell of the cdc2 pollen merges only with the egg cell and not with the central cell. This shows a hierarchy, never before discovered, in the fertilisation process of Arabidopsis. The scientists made another astounding observa...

Ancient humans brought bottle gourds to the Americas from Asia

... Americas some 10,000 years ago by individuals who arrived from Asia, according to a new genetic comparison o...nd -- were conveyed to North America by people who arrived from Asia in boats or who walked across an ancient land bridge between the continents, or that the g...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

...ico to Canada, the way they did when the Europeans arrived here three centuries ago." ...

Study shows big game hunters, not climate change, killed off sloths

...e factor." The fossil record shows the people who arrived in North America were making sophisticated tools out of stone, bone and ivory, Steadman said. These "big-game hunters" had a traumatic effect on the animals living there, he said. More than three-fourths of the large species of mammals that roamed t...

Emerald Spectre haunts Ontario's ash forests

...saac knows well what the future will look like. He arrived at his Windsor-area home one day in the summer of 2003 to see a neighbour cutting down 25 ash trees, among the borer's first victims. In Michigan's Wayne County, the first area infected, 60 per cent of the ash trees are already dead. "In my opinion...

FDA: 'Highly Unlikely' Green Tea Lowers Cancer Risk

...tant at the University of North Carolina Hospitals arrived in February sporting three arms, a computerized brain and a glowing track record in helping to repair heart valves, remove cancerous prostates, bypass blocked coronary arteries and perform gastric bypass operations for morbid obesity. The new arriva...

Screen all at risk for HIV, plus pregnant women

...tant at the University of North Carolina Hospitals arrived in February sporting three arms, a computerized brain and a glowing track record in helping to repair heart valves, remove cancerous prostates, bypass blocked coronary arteries and perform gastric bypass operations for morbid obesity. The new arriva...

Surgical Robot 'Scrubs In' At UNC, May Be More Precise Than Conventional Surgery

...tant at the University of North Carolina Hospitals arrived in February sporting three arms, a computerized brain and a glowing track record in helping to repair heart valves, remove cancerous prostates, bypass blocked coronary arteries and perform gastric bypass operations for morbid obesity. The new arriva...

Neandertal femur suggests competition with hyenas and a shift in landscape use

...ic archeological period, just before modern humans arrived in Europe. The research will be published in the PNAS online early edition the week of May2-6. "In Europe, with the transition from Neandertals to modern humans, anthropologists have long argued that major behavioral changes and major improvements ...

Bugs, even 'bad' ones, can be educationally beneficial, new book says

...xample, in 1869, the gypsy moth (Lymantria dispar) arrived in Medford, Mass., from Europe when the French naturalist Leopold Trouvelot brought them to use in silk culture experiments. A few escaped as caterpillars and their descendants thrived, leading to rampant defoliation 20 years later. Such destruction...

In the migratory marathon, parasitized monarchs drop out early

...tances, so they can't propagate the infection once arrived at destination. A little-studied outcome of animal migration is whether these long journeys can limit the spread of parasites by weeding out diseased animals. Monarch butterflies in eastern North America fly up to thousands of kilometers from Canad...

Nano-Probes Allow an Inside Look at Cell Nuclei

...processes. "We could determine whether a drug has arrived where it is supposed to, and if it is having the desired impact," says Chen. The first enduring look into the secret lives of cell nuclei comes by way of a strong collaboration between biologists and chemists. For the past four years, Chen and Gerio...

Growth in the sea comes down to a struggle for iron

...ins. In July, by the time Wells and his colleagues arrived at their appointed location in the northwestern Pacific, the Japanese team had already injected iron into the water and were monitoring the growing phytoplankton patch, roughly six by eight kilometers in size. "The patch changed quickly and constant...

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