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Tag: "raise" at biology news

One species, many genomes

...s normal function anymore! Results such as these raise fundamental questions. For one, they qualify the value of the model genomes sequenced so far. "There isn’t such a thing as the genome of a species," says Weigel. He adds "The insight that the DNA sequence of a single individual is by far not suffic...

Study investigates 'divorce' among Galapagos seabirds

...male,” Maness said. It takes a lot of energy to raise a chick and the responsibility is shared by both males and females. They raise one chick at a time. Parents incubate the egg for 43 days. Then, it takes another 100 to 120 days ...

CU study reveals why starling females cheat

...m within their social group when they need help to raise their chicks. (Superb starlings are cooperative br...ing the chicks, or in extreme cases, leaves her to raise the chicks on her own. But because superb starlings, a bird common to East Africa, are cooperative b...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...s get sent back and forth"" Their findings also raise the question of why the flies have a change in their sleep pattern when infected. The researchers speculate that from an evolutionary standpoint, there may be some microbes that are fought better when sleep is disrupted, although clearly not the two ...

Study warns deep-sea mining may pose serious threat to fragile marine ecosystems

... water in their habitat. The process will also raise the concentrated nutrients from the deep sea to the relatively nutrient-poor surface waters of the ocean, causing algal blooms and potentially contaminating waters that support Papua New Guinea’s commercial fishing industry, as well as local subsiste...

Gene thought to assist chemo may help cancer thrive

...ayed only a 30 percent survival rate. The findings raise the possibility of a new strategy for fighting cancer - namely, developing drugs to disable the functioning of this gene in the tumors of patients undergoing chemotherapy. The results appear in the May 16 edition of the open access journal PLoS ONE. ...

Sleep quantity affects morning testosterone levels in older men

... testosterone levels. "The results of the study raise the possibility that older men who obtain less actual sleep during the night have lower blood testosterone levels in the morning," said Penev. "Although the findings suggest that how long a person sleeps may be an indicator of age-related changes in...

Mutation improves memory, may lead to memory-enhancing pill

...," the researchers concluded. "These findings also raise the interesting possibility that regulators of translation could serve as therapeutic targets for the improvement of memory, for instance in human disorders associated with memory loss." ...

Tracking sperm whales and jumbo squid

...the journal Marine Ecology Progress Series (MEPS), raise new questions about the diving behavior of both species. "Sperm whales (Physeter macrocephalus) and jumbo squid (Dosidicus gigas) are both major predators that spend much of their lives in one of the world’s largest ecosystems, the mesopelagic zon...

Scientists learn the origin of rogue B cells

...r questions," says Casellas. Their new findings raise the question of how this knowledge might eventually help people with autoimmune disease. That question, says Casellas, is one that will take time to answer. "This is only one step," he says. "We all carry these cells around, but not all of us develop...

Hotspots of mercury contamination identified in eastern North America

...e element or that are already affected by it could raise the risk to people and wildlife that consume fish. There is reason to believe, however, that lowering emissions can reduce risk: an analysis of levels of mercury contamination over time in the Merrimack River watershed suggests that lowered emissions...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

...ollaborate to benefit disease. These findings also raise the possibility - somewhat counter-intuitively -- that stem cells may inherently exert an anti-inflammatory influence in degenerative diseases," said Snyder. To demonstrate that a better understanding of the fundamental mechanisms of stem cell ...

Common gene version optimizes thinking -- but with a possible downside

...ed Andreas Meyer-Lindenberg, M.D. "Our results raise the question of whether a gene variant favored by evolution, that would normally confer advantage, may translate into a disadvantage if the prefrontal cortex is impaired, as in schizophrenia," added Daniel Weinberger, M.D. "Normally, enhanced cortex ...

Fitness has fallen since the days of Ancient Greece

... would have to be an extremely fit group. Our data raise the interesting notion that these ancient athletes were genetically better adapted to endurance exercise than we are today." Dr Rossiter worked closely with Professor Boris Rankov, Professor of Classics at Royal Holloway, University of London to i...

Vasectomy may put men at risk for type of dementia

...he brain. Weintraub theorizes a vasectomy may raise the risk of PPA (and possibly FTD) because the surgery breeches the protective barrier between the blood and the testes, called the blood-testis barrier. Certain organs ?including the testes and the brain ?exist in what is the equivalent of a gat...

Tumor-suppressor gene is critical for placenta development

... how the Rb gene blocks tumor growth. They also raise the possibility that this important tumor-suppressor gene might play a role in miscarriages. The study, led by researchers at the Ohio State University Comprehensive Cancer Center, is published in the January 2007 issue of the journal Genes and De...

DNA ends: Common tool, different job

...tional RPA complex acts elsewhere in the genome to raise a red flag to attract the attention of the repair machinery," says Lundblad, "curiously, the t-RPA complex performs the exact opposite function at chromosome ends, ensuring that these tips do not become targets for DNA repair." ...

Natural gut hormone offers hope for new obesity drug

...over a long period are safe. It does not appear to raise blood pressure or heart rate, or any other obvious side effects." With funding from the Seeding Drug Discovery initiative, Professor Bloom and colleague Dr Caroline Small hope to develop a synthetic form of PP which can be administered to patients....

40,000-year-old skull shows both modern human and Neandertal traits

...ertals. Professor Zilhao said: "Such differences raise important questions about the evolutionary history of modern humans. They could be the result of evolutionary reversal or reflect incomplete palaeontological sampling of Middle Paleolithic human diversity. "They could also reflect admixture with N...

Antarctic warming to reduce animals at base of ecosystem, shift some penguin populations southward

...imate models predict will do more harm than simply raise the sea levels that most observers fear. It will make drastic changes in fragile ecosystems throughout the world, especially in the Antarctic. A warming trend during the last few decades in the Antarctic Peninsula has already forced penguin populat...

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