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Tag: "mass" at biology news

War on terror meets war on cancer

...ders. The method, known as "stable isotope ratio mass spectrometry," can determine where a substance was...ide the bacteria. Water samples were analyzed in a mass spectrometer, which detects the atomic weights of isotopes of oxygen within the water. The result: ...

'Acid rain' and forest mass: Another perspective

...of the deposition of these compounds on the forest mass are the well-known nutrition disorders of the same. One classic effect is that of cation deficit (particularly magnesium) due to the washing both of the forest canopy and the soil produced by these together with anions (sulphates and nitrates). This ...

Seaweed yields new compounds with pharmaceutical potential

...anta), nuclear magnetic resonance spectroscopy and mass spectral analyses to determine how carbon, oxygen, bromine and hydrogen atoms connected to make up the molecular structures of the 10 new natural products. Much research is left to do before any of these compounds are used to formulate a drug avail...

Health of coral reefs detected from orbit

...diation. Bleaching may take place on localised and mass scales ?there was an extensive bleaching event in 1998 and 2002 likely linked to El Ni�o events. "An increase in frequency of coral bleaching may be one of the first tangible environmental effects of global warming," states Dr. Arnold Dekker of Au...

MIT researcher presents new view of how the cortex forms

...long nerve fibers from the thalamus, a large ovoid mass that relays information to the cortex from other brain regions, are activated by external stimuli to impose identity on the homogeneous blob. New evidence indicates that the development of cortical areas involves "a rich array of signals," an interw...

Researchers make long DNA 'wires' for future medical and electronic devices

...ut first, researchers must develop technologies to mass produce DNA circuits as they produce chip circuits today. The technique that Lee and Guan used is similar to a relatively inexpensive chip-making technology called soft lithography, where rubber molds press materials into shape. In this study, they...

Johns Hopkins flu expert calls for mandatory vaccination of health care workers

...ne Nov. 9, Trish Perl, M.D., M.Sc., concludes that mass vaccination policies are required to prevent patients from accidentally contracting the virus directly from an infected medical staff worker or indirectly from other patients or visitors via medical staff. Previous research from Hopkins showed tha...

Mouse study: New muscle-building agent beats all previous ones

...n agent that's more effective at increasing muscle mass in mice than a related potential treatment for muscular dystrophy now in clinical trials. The new agent is a version of a cellular docking point for the muscle-limiting protein myostatin. In mice, just two weekly injections of the new agent triggere...

Why the Amazon rainforest is so rich in species

...one and tropical South America can be explained by mass extinctions caused by the glaciations. Most species living in North America and Europe are relatively recent arrivals because the original inhabitants were wiped out by those ice ages. They haven't had time to evolve into multiple species yet, wherea...

Animal models show that anabolic steroids flip the adolescent brain's switch for aggression

...ous potential for aggression and violence. Muscle mass and medals aren't worth the risk of hurting someone or landing in jail." Finally, researchers such as Melloni hope these new insights can lead to treatments for aggressive behavior, with or without steroid abuse. "Linking aggression to fluctuations...

A real time look at interactions between RNA and proteins

... that interact with the mRNA are identified with a mass spectrometer. With their system, the researchers are trying to identify RNA-binding proteins that bind RNAs of interest–such as those involved in the targeting, degradation, and translation of RNAs into proteins. Once identified, the Eberwine team...

Intelligently designed molecular evolution

...cular product, then introduce it into microbes for mass production. In addition to synthesizing therapeutic drugs, other possible applications would include flavors, fragrances and nutraceuticals. "Our ultimate goal is to be able to put as much chemistry as we can into microbes," said Keasling, a pionee...

UW scientists unravel critical genetic puzzle for flu virus replication

...s, to quickly engineer viruses that can be used to mass produce vaccines. Researchers have been trying to make viral vectors using nine genetic segments, a strategy that has never worked, Kawaoka notes. "To develop an influenza virus vector, we have to stick to this eight-segment concept," he says. Such...

Enzyme inhibitors block replication of SARS virus

...the SARS enzyme. The findings were confirmed using mass spectrometry analysis of the enzyme intermediary. "These benzotriazole esters are relatively stable and act as suicide inhibitors," Wong said. "They block the enzyme, are transformed through a co-valent bond, and are unable to get out." Wong said...

Horseshoe crab decline threatens shorebird species

...Bay stopover, the red knot nearly doubles its body mass as it gorges itself almost exclusively on horseshoe crab eggs. The purpose of this feeding frenzy is to ensure that the shorebirds have enough energy to complete the trip north to their breeding ground in the Artic. However, due to horseshoe crab's...

Tastier tomatoes in the future?

...Plant Physiology. The technique - a combination of mass spectrometry and gas chromatography - analyzes the composition of biological samples. It can be used to quickly and simultaneously look into a fruit's amino acids, organic acids, sugar and vitamins. Dr. Alisdair Fernie, head of the Institute's "Cent...

Typhoid fever led to the fall of Athens

... in the emergence and spread of this epidemic. A mass burial pit unearthed in the Kerameikos ancient cemetery of Athens and dated back to the time of the historical outbreak, provided the required skeletal material for the investigation of ancient microbial DNA. Aided by modern DNA recovery and amplifi...

Antioxidant selenium offers no heart-disease protection

...ciodemographics, health habits, education and body mass index also was collected. Participants provided blood samples at their respective clinics twice a year and reported any new illnesses or medications. Individuals were followed for an average of 7.6 years. Results showed no association between sele...

The closest look ever at the cell's machines

..., developed in 2001 by Bertrand Séraphin at EMBL), mass spectrometry and bioinformatics to investigate the entire protein household of yeast, turning up 257 machines that had never been observed. It also revealed new components of nearly every complex already known. In the course of the work, new comput...

Next good dinosaur news likely to come from small packages

... is laid by stubbornly durable molecules. She uses mass spectrometry, an analytical technique that determines what molecules are present. Molecules may be tiny, but they can be tough, Ostrom said. The plant that a mastodon munched some 10,000 years ago disperses through the animal's body, sprinkling mole...

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