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Tag: "depend" at biology news

African amphibians make extreme parental sacrifice: The skin off their backs

Just as baby mammals depend on their mothers' milk, the young of the African a...ified to be particularly nutritious, and the young depend entirely on this food source for perhaps as long as four weeks, Nussbaum said. "This form of post-h...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

... whale are at the top of the marine food chain and depend on multiple species lower in the chain. For examp...er, other mammalian species, in particular whales, depend on different arthropods, such as the tiny crustaceans called copepods and krill. Twenty percent...

Blood flow in brain takes a twist, affecting views of Alzheimer's

...starve from a lack of nutrients, since the neurons depend on the astrocytes for their survival." The new research focuses on a process critical to the health of people with Alzheimer's and everyone else: the moment-to-moment allocation of vital resources like oxygen that goes on within our bodies. It's a s...

One fish, two fish: New MIT sensor improves fish counts

... know what's going on." Current surveying methods depend on highly localized observations taken from slow-moving research vessels, which provide only a small amount of data about a large shoal, Makris said. "It would be like watching 'Casablanca' and you're seeing one pixel moving across the screen, and th...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...son in 1998, like many subsequently derived lines, depend on tissue culture technology that was established in the 1950s. In addition to mouse feeder cells obtained from mouse embryos, the original embryonic stem cell cultures depended on bovine serum products. The two new Wisconsin stem cell lines were de...

Experimental drug reverses key cognitive deficits, pathology in Alzheimer's

...rm in a tank of murky water. This test is known to depend on the function of the hippocampus. The researchers found that the treated mice performed significantly better than untreated knockout mice on the task. Significantly, found the researchers, the poorer performance of the untreated mice resulted from...

Value of services performed by insects tops $57 billion in US

...what proportion of the animals in those categories depend on insects for nutrition. For pest control, they looked at the amount of damage now incurred by pests, and, knowing that 65 percent of pests are controlled by other insects, calculated the losses if predators or parasites weren't going after their pr...

Afghanistan to protect wildlife and wild lands

...ability in a country where so many people directly depend on local natural resources for their survival. Conservation can also inspire local communities and even neighboring countries to work together to protect the region's natural heritage." Afghanistan's natural landscape is dominated by the Hindu Kush ...

NASA study solves ocean plant mystery

... the food that nearly all other organisms on Earth depend on for life. Nutrients that make ocean plants thrive, such as nitrogen and phosphate, mostly come from the deep parts of the ocean, when water is mixed by the wind. Iron also can come from dust blowing in the air. Approximately half of the photos...

Indonesia - disaster relief aid in action

...ncerning material or additional aid personnel will depend on information to follow via the scouts. The RDRTF has already received a generous offer from Australian colleagues via Dr. David Harris, Westmead, volunteering to provide on-call support. ISN's Team will remain on the ground until further notice. ...

A more powerful and efficient engine for rice: the C3-C4 challenge

... backward into poverty. More than 3 billion people depend on rice as their main food source each day, including most of the world's poor. "Frankly, we have almost exhausted the traditional methods of increasing rice production, especially considering the environmental challenges we face such as climate ...

Study reveals how ADHD drugs work in brain

Although millions depend on medications such as Ritalin to quell symptoms of attention deficit hyperactivity disorder (ADHD), scientists have struggled to pinpoint how the drugs work in the brain. But new work at the University of Wisconsin-Madison is now starting to clear...

Brain enzyme treatment relieves memory lapse in Alzheimer's mice

...sponses represent different forms of learning that depend on different parts of the brain. A day after the...ls' ability to establish a memory for fear did not depend on changes in Aß levels. The findings provide a new window into the Alzheimer's brain that could l...

Adult stem cells are touchy-feely, need environmental clues

...part of the body's natural regenerative mechanism, depend on physical clues from their local environment in order to transform into different types of tissue. The researchers were even able to manipulate stem cells by changing the firmness of the gel on which they were grown. The researchers believe that ...

Wild bees and the flowers they pollinate are disappearing together

...el shifts in the plant world, with the plants that depend on pollination by bees disappearing too. Dr Bill Kunin, coordinator of the project at the University of Leeds explained: "We looked at plant changes as an afterthought, and were surprised to see how strong the trends were. When we contacted our D...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

... epilepsy new options," he said, but progress will depend upon funding, he added. Next steps The researchers will repeat the study using animals that are awake and mobile, though it is more difficult to record the brain's discharges in freely moving animals. Then the research can move to humans. ...

Scientists identify protein with a crucial role in cell death

...s have suspected that the inner workings of a cell depend largely on how the mitochondria function. Therefore, it has been suspected that poorly functioning mitochondria can, among other things, lead to a disturbance in brain cells and thus contribute to Parkinson's disease. A noble stranger... This sta...

Small molecule interactions were central to the origin of life

...stead, Shapiro raises an alternative that does not depend on a "stupendously improbable accident," presenting the more plausible idea that life began within a mixture of simple organic molecules, multiplied through catalyzed reaction cycles and an external source of available energy. "The diversity of orga...

Innovative method for creating a human cytomegalovirus vaccine outlined

... and senior author on the new study. "Success will depend on achieving a certain balance between the immune-stimulating genes from the human virus and the basic safety of the mouse virus." Over the years, a number of scientists have worked to create a vaccine against human CMV. Among these is former Wista...

Gene discovery opens door to tackling disease

... in prostate cancer cells. "Most of those cancers depend on the hormones to stay alive, so if we can use SLIRP to block the hormones we may be able to help stop those diseases in their tracks." Professor Leedman said the discovery could open the door to targeted new treatments for the cancers. "If we can...

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