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Tag: "mass" at biology news

Key to zebrafish heart regeneration uncovered

... heart is removed, the dynamic interplay between a mass of stem cells that forms in the wound and the prot...actors facilitate the interaction between the cell mass and the protective covering, encouraging the formation of new heart muscle. Many cell biologists ...

How fish mend a broken heart

... proceeds through two coordinated stages. First, a mass of undifferentiated, pre-cardiac cells form. Those progenitor cells then begin to differentiate and divide, to replace the damaged heart muscle. In the second step, the epicardium surrounding the heart chambers "lights up" with activity as developm...

Light wine intake is associated with longer life expectancy in men

...eys included drinking habits, dietary habits, body mass index, smoking habits and the prevalence of heart attack, stroke, diabetes and cancer. The statistics on alcohol consumption were adjusted to account for other risk factors. The researchers found that long-term, light alcohol intake of less than o...

A sweet step toward new cancer therapies

...l Chemistry. Typically, analytical chemists use mass spectrometry---a technique that accurately weighs ... In this process, proteins are introduced into the mass spectrometer and fragmented by heating until the weakest bonds break. "It's the 'shake-it-til-it-bre...

Cryoablation -- A new treatment option for some kidney tumor patients

... monitored with CT, to ensure that the total tumor mass is treated. The researchers reviewed the records of the 23 men and 17 women with kidney cancer treated with percutaneous cryoablation at Mayo Clinic between March 12, 2003, and Aug. 4, 2005. They found that this treatment was chosen over RFA for ...

Colour sensor breath test can detect lung cancer

... the authors. This includes gas chromatography and mass spectrometry, which requires a great deal of expertise to use and is very expensive. As cancer is often silent in its early stages and symptoms are often not specific, it is often difficult to pick up the disease at a stage when it could be treate...

Satellites shed light on global warming

... to increased velocity result in strongly negative mass balance of the glaciers. "The velocity of the ...sed the glaciers," Rott said. "The total estimated mass loss of glaciers above the disintegrated ice shelf sections since 2002 has been equivalent to about ...

Tears reveal some of their deepest secrets to researchers

...oratory. They used a technique called electrospray mass spectrometry to differentiate between the differen... types of lipids in the tear film, but advances in mass spectrometry technology are improving research efforts. "Other scientists used different techniqu...

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...m used electron transfer dissociation (ETD) tandem mass spectrometry, a technology that breaks apart prote...y size and identifies the fragments based on their mass - their size and weight. The process improves on previous techniques by breaking up proteins more ge...

Napoleon's mysterious death unmasked, UT Southwestern researcher says

...lesion described in the autopsy. "It was a huge mass from the entrance of his stomach to the exit. It was at least 10 centimeters long. Size alone suggests the lesion was cancer," Dr. Genta said. They then used a state-of-the-art tumor-staging method from 21st century pathology and determined that N...

Rewarding fat rats

...by lab rats were put on a diet to reduce their fat mass and, hence, their leptin levels. They found that restricting the rats' diet to one meal per day not only made them lose weight, but also made reward sensations stronger. Conversely, increasing the level of leptin in the brain weakened the reward sens...

Einstein's tea leaves inspire new blood separation technique

...p -- but could still be five to 10 years away from mass production. ...

Growth hormone is not the anti-aging bullet for healthy adults

..., we found that growth hormone increased lean body mass or muscle mass by slightly more than two kilograms (that's a little over four pounds) and decreased fat mass by abo...

Twin studies reveal genetic components leading to cardiac and kidney disease

... is associated with increased blood pressure, body mass index, and insulin resistance, among other factors. In twin subjects with elevated CRP, multiple, common genetic variants were found along a pathway associated with the adrenergic system. Adrenergic stimulation is what is involved in the 'flight or...

Bats prey on nocturnally migrating songbirds

...est aerial-hunting bats of the world. A large body mass (up to 50 g for 45 cm wingspan) is probably a prerequisite for subduing prey items as large as passerines, which have approximately the same weight as other European bat species. The extraordinary predatory specialization of the giant noctule may ...

Researchers urge monitoring of bone health during chemotherapy

...ony-stimulating factor (G-CSF), the mice lost bone mass and experienced increased bone tumor growth when injected with cancer cells. Their study will appear in an upcoming issue of the journal Blood and is now available online. G-CSF is known by the trade names Neupogen, Neulasta and Granocyte. Clinica...

Bioluminescence at the service of a novel cerebral imaging technique

...ain. These maps are a prerequisite to producing a mass of data on the global activity of the entire brain which will then serve as a reference to compare cerebral activity in different contexts: for example, differences between males and females (demonstration of sexual dimorphism) or as a function of ag...

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

...inside of the embryo. These become the inner cell mass of stem cells. Previously, it was believed that the mammalian embryo starts its development with identical cells and only as these inside and outside cells form do differences between cells first emerge. However, research led by Professor Magdele...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...re of the bones," said John Asara, director of the mass spectrometry core facility at Beth Israel Deacones...course of a year and a half using highly sensitive mass spectrometry methods. "This allows you to get the chance to say, ‘Wait, they really are related beca...

Massive coral death attributed to earthquake

... what is thought to be one of the world’s greatest mass death of corals ever recorded as a result of the e...onesia Marine Program reports: "This is a story of mass mortality on a scale rarely observed. In contrast to other threats like coral bleaching, none of the...

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