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Tag: "past" at biology news

Bioartificial kidney under study at MCG

...0 to 70 percent of those patients die and over the past 20 years, despite dialysis, that has not changed much." He hopes the new device, developed by Dr. H. David Humes at the University of Michigan, can help turn the tide for some patients by more closely mimicking the many important functions of the ki...

Wisconsin scientists grow critical nerve cells

...e of motor neuron development to another. But once past a certain point, Li found that the cells kept veering off toward different cellular destinies. After hundreds of unsuccessful variations of growth factors and morphogens, Li was struck by an idea: Why not apply a chemical known to be necessary for a ...

Growth in the sea comes down to a struggle for iron

...s in iron inputs to the oceans during the geologic past may have removed enough carbon from the atmosphere to affect global climate, perhaps even contributing to the onset of ice ages. Martin died in 1993 just as tests of his ideas were getting underway, but scientists have embarked on a series of experim...

Recent breakthroughs in common adult leukemia highlighted in New England Journal of Medicine

...nity's knowledge of CLL that has occurred over the past decade. The review appears in the February 24 issue. Two of the expert authors are with the North Shore-Long Island Jewish (LIJ) Health System (www.northshorelij.com): Nicholas Chiorazzi, MD, director and CEO of the Institute for Medical Research at...

Male circumcision reduces risk of HIV transmission from women to men

...tly higher than infectivityrates calculated in the past from studies of monogamous couples. Theirresults may help explain the rapid spread of HIV in settings wherecircumcision is not common and multiple sexual partnerships are. Between1993 and 1997, 745 male employees of trucking companies based inMombas...

Ecological destruction fuels emerging diseases

... Washington D.C. Dr. Brooks has spent much of the past decade slogging through the dense jungles of Costa Rica tracking down and collecting parasites. Since 1996, he has coordinated the parasite Taxonomic Working Group for the All-Taxa Biodiversity Inventory (ATBI), an international scientific and econom...

Learning to fight an adversary that won't stay down

...odern' approaches to antibiotic discovery over the past six or seven years and this has failed miserably." The scientist, whose work is supported by Science and Engineering Research Canada (NSERC), has organized a symposium on the evolutionary genetics of antibiotic resistance at the 2005 meeting of the ...

Found: Missing sequence of the human Y chromosome

...n. Segmentalduplications, which emerged during the past 30 million years of primateevolution, are significantly enriched in subtelomeric andpericentromeric sequences, and now comprise approximately 5% of thehuman genome, were considered to be one of the biggest obstacles tofinishing the human genome seque...

The secret lives of whales

...ed at their genetic variation ?an indicator of the past size of their population. Piecing together their a...the whales?varied DNA reveals a different story, a past with an ocean teeming with whales. It also shows a steadily growing population, with drastic declin...

Researchers reveal the infectious impact of salmon farms on wild salmon

...vious studies have been dismissed by industry, but past studies haven't looked at such large samples or the spatial aspect," says fisheries biologist Ransom Myers of the University of Dalhousie. "This study goes far beyond a theoretical model. They tested the model in the real world, using an enormous dat...

Scientists discover the cellular roots of graying hair

...or in the disease, whichhas been increasing in the past several decades.Melanocytes, which manufacture and store the pigment that combines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovered by Nishimura ...

Fundamental Finding Yields Insight into Stem Cells, Cancer; Opens Door to Drug Discovery

...or in the disease, whichhas been increasing in the past several decades.Melanocytes, which manufacture and store the pigment that combines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovered by Nishimura ...

Essential mangrove forest threatened by cryptic ecological degradation

...Dahdouh-Guebas has demonstrated that in the recent past an increase in human-environment interactions that...goons into freshwater bodies. Such elucidation of past ecosystem processes and human-environment interactions is an essential part of the Past Global Chang...

Weizmann Institute scientists develop a new approach for directing treatment to metastasized prostate cancer in the bones.

...or in the disease, whichhas been increasing in the past several decades.Melanocytes, which manufacture and store the pigment that combines withhair-making cells called keratinocytes to color the hair, arespecialized cells spawned by colorless melanocyte stem cells. Thesecells were discovered by Nishimura ...

Taking Aim With Nanoparticle PEBBLEs

... he and his collaborators have been doing over the past seven years, including encouraging preliminary results using PEBBLEs to treat a virulent form of brain cancer in rats. PEBBLEs are polymer spheres, typically 20 to 200 nanometers in diameter—about the size of a virus. The spheres carry an assortment...

Nano-Probes Allow an Inside Look at Cell Nuclei

...aboration between biologists and chemists. For the past four years, Chen and Gerion have worked closely wi...rom a virus's playbook to smuggle this nanocrystal past the highly selective membrane that guards the entrance into the nucleus. In nature, a virus called S...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...ton said. "To make climate judgments based on the past requires knowing the past climate accurately," he said. ...

UCLA scientists transform HIV into cancer-seeking missile

...eam to new tumors in the animals' lungs. "For the past 20 years, gene therapy has been hampered by the lack of a good carrier for therapeutic genes that can travel through the blood and aim itself at a precise location, thereby minimizing harmful side effects," explained Irvin S.Y. Chen, Ph.D., director ...

New research indicates a 'troubled' greenhouse is brewing

...ated a global greenhouse event," he explains. "The past methane outburst dwarfed even human consumption of...ils have long been known as sources of evidence of past rainfall, but Retallack says they also can be used to determine the seasonality of rainfall as well ...

Agilent Technologies releases automated literature search tool for biology researchers

...in the scientific literature and patents. "Mining past literature for information about proteins and protein interactions is a critical step for building models of cells," said Trey Ideker, assistant professor at the University of California, San Diego, and lead researcher/program manager for the Cytosca...

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