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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:4/23/2014)... diner ripping open a dinner roll, a fuel cell ... a hydrogen molecule. Now researchers have captured a view ... of its hydrogen feast. The view confirms previous hypotheses ... work better for alternative energy uses. , This study ... the hydrogen halves end up in the structure of ...
(Date:4/23/2014)... the source of a unique rhythmic sound, recorded for ... is the Antarctic minke whale ( Balaenoptera bonaerensis ). ... 1960s who thought it sounded like a duck, the ... the Southern Ocean, but its source has remained a ... team of researchers deployed acoustic tags on two Antarctic ...
(Date:4/23/2014)... Buenos Aires yesterday, Argentina joins the European Molecular ... The move strengthens the ties between the European ... Argentinian scientists access to EMBL,s world-class facilities and ... since its inception, fostering excellent life science research ... core of EMBL,s mission," says EMBL Director General ...
Breaking Biology News(10 mins):Halving hydrogen 2Halving hydrogen 3Halving hydrogen 4Scientists identify source of mysterious sound in the Southern Ocean 2Scientists identify source of mysterious sound in the Southern Ocean 3
(Date:4/23/2014)... Society for Radiation Oncology (ASTRO) has issued a ... for Endometrial Cancer: An ASTRO Evidence-Based Guideline," that ... the treatment of endometrial cancer. The guideline,s executive ... of Practical Radiation Oncology (PRO), the ... guideline is available as an open-access article online ...
(Date:4/23/2014)... has long been considered to be between 180 and ... used refined microscopic techniques that indicate a much smaller ... tract is only as large as a normal studio ... which passes from the mouth through the esophagus and ... 5 meters in a normal adult, and is built ...
(Date:4/23/2014)... benefits of probiotics, antioxidants and other nutritional compounds, more ... industry is getting in on the action. But legitimate ... the industry is responding with clinical research to shore ... Chemical & Engineering News (C&EN), the weekly ... M. Bomgardner, a senior editor at C&EN, writes that ...
(Date:4/23/2014)... Parents and physicians concerned about an increase in ... can breathe a sigh of relief. According to a ... years worth of data from states with and without ... to increased use among adolescents. The study is published ... of Adolescent Health . , "Any time a ...
(Date:4/23/2014)... Getting to the bottom of Alzheimer,s disease has ... turns and controversies. In the latest crook in ... insight into the interaction between proteins associated with ... journal ACS Chemical Neuroscience , could have ... K. Surewicz, Krzysztof Nieznanski and colleagues explain that ...
Breaking Medicine News(10 mins):Health News:ASTRO issues guideline on the role of postoperative radiation therapy for endometrial cancer 2Health News:ASTRO issues guideline on the role of postoperative radiation therapy for endometrial cancer 3Health News:The surface area of the digestive tract 'only' as large as a studio apartment 2Health News:RI Hospital physician: Legalizing medical marijuana doesn't increase use among adolescents 2
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