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Tag: "overturn" at biology news

Stem cells in bone marrow replenish mouse ovaries

...al Cell. This finding provides direct evidence to overturn a long-held dogma in reproductive biology, that female mice generate egg cells only during fetal development and thus are born with a finite stock of eggs that declines throughout life. The new report significantly extends earlier work from the same ...

Ancient DNA confirms single origin of Malagasy primates

...he possibility that data from additional taxa will overturn this increasingly robust hypothesis." Yoder said the researchers' results support the close relationship of sloth lemurs (Palaeopropithecus) to living indriids, but Megaladapis does not show a sister-group relationship with the living genus Lepilemu...

Scientists discover stage at which an embryonic cell is fated to become a stem cell

...why this occurs. The findings of the study, which overturn the long-held belief that cells are the same until the fourth cleavage (division) of the embryo, are reported in today's edition of Nature. After fertilisation, the cells of the embryo at first undergo equal, symmetrical divisions and unequal, asym...

Antarctic icebergs -- Hotspots of ocean life

...e mountains of ice – which can shed huge pieces or overturn without warning – the scientists began their shipboard sampling mere hundreds of feet from the icebergs and continued out to a distance of some five miles, where the icebergs’ influence was no longer detectable. “Phytoplankton around the icebergs...

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(Date:9/17/2014)... decline, grasses have returned to some once-denuded patches of ... those places seems healthy again, but a new study ... coastal protection remains diminished. , "We,ve got ... back," said ecologist Mark Bertness, professor of biology at ... journal Biological Conservation . "The metric of a ...
(Date:9/17/2014)... faster since the 1960s. The typical development phases of ... accelerated -- by as much as 70 percent. This ... scientists from Technische Universitt Mnchen based on long-term data ... since 1870. Their findings were published recently in ... was a hot topic, with the very survival of ...
(Date:9/17/2014)... new crime unit designed to fight food fraud ... meat being passed off as beef scientists from ... They describe their approach, which represents a vast improvement ... and Food Chemistry . , Hans-Ulrich Humpf and colleagues ... problem. But they also say that adding, for example, ...
Breaking Biology News(10 mins):Cape Cod saltmarsh recovery looks good, falls short 2Cape Cod saltmarsh recovery looks good, falls short 3Global change: Trees continue to grow at a faster rate 2Global change: Trees continue to grow at a faster rate 3
(Date:9/17/2014)... is available in Spanish . ... than half of the population in our Community. Excess ... which affects liver function. Fat accumulates in the liver ... fibrosis and finally, cirrhosis. To date, the most reliable ... Imaging techniques such as abdominal ecography detect it but ...
(Date:9/17/2014)... West Orange, NJ. September 17, 2014. Kessler Foundation ... grants awarded by the International Progressive Multiple Sclerosis ... Neuropsychology, Neuroscience & Traumatic Brain Injury Research, is ... at the efficacy of cognitive rehabilitation in individuals ... of 22 research grants awarded by the Alliance ...
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(Date:9/17/2014)... 2014 Elsevier, a world-leading provider of scientific, ... announced the publication of a position statement by ... the journal Maturitas on the topic ... the most prevalent cancer in women, with slightly ... Western countries. Mammography screening is a well-established method ...
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Breaking Medicine News(10 mins):Health News:Magnetic resonance helps to detect and quantify fat in liver 2Health News:Kessler Foundation receives first-round grant from International Progressive Multiple Sclerosis Alliance 2Health News:Join GSA in Washington, DC, for the Nation's Premier Aging Conference 2
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