not really a blog
With his soft voice and friar’s manner, Louis Sorkin hardly seems the type to flout the sensible advice of a nursery rhyme. Yet on a recent afternoon at the American Museum of Natural History, Mr. Sorkin, a renowned entomologist, did precisely, luridly that CONTINUED...
Tang Wei's character sings a classic Chinese folk song for Tony Leung's character in Ang Lee's "Lust Caution."
The song is called 天涯歌女, which translates to "Wandering Songstress."
STOCKHOLM, Sweden — Two Americans and a U.S.-based Japanese scientist won the Nobel Prize in chemistry on Wednesday for research on a glowing jellyfis
h protein that revolutionized the ability to study disease and normal development in living organisms.
Japan's Osamu Shimomura and Americans Martin Chalfie and Roger Tsien shared the prize for discovering and developing green fluorescent protein, or GFP, the Royal Swedish Academy of Sciences said.
Researchers worldwide now use GFP to track such processes as the development of brain cells, the growth of tumors and the spread of cancer cells. It has let them study nerve cell damage from Alzheimer's disease and see how insulin-producing beta cells arise in the pancreas of a growing embryo, for example.
The academy compared the impact of GFP on science to the invention of the microscope. For the past decade, the academy said, the protein has been "a guiding star for biochemists, biologists, medical scientists and other researchers."
When exposed to ultraviolet light, the protein glows green. So it can act as a tracer to expose the movements of other, invisible proteins it is attached to as they go about their business. It can also be used to mark particular cells in a tissue and show when and where particular genes turn on and off.
Tsien developed GFP-l .....CONTINUED.....
The “cantaloupe ridges” are magnetic in nature. They outline giant, bubbling convection cells on the surface of the sun called “supergranules.” Supergranules are like bubbles in a pot of boiling water amplified to the scale of a star; on the sun they measure some 30,000 km across (twice as wide as Earth) and are made of seething hot magnetized plasma. Magnetic fields at the center of these bubbles are swept out to the edge where they form ridges of magnetism. The ridges are most prominent during years around Solar Max when the sun’s inner dynamo “revs up” to produce the strongest magnetic fields. Solar physicists have known about supergranules and the magnetic network they produce for many years, but only now has RHESSI revealed their unexpected connection to the sun’s oblateness.
“When we subtract the effect of the magnetic network, we get a ‘true’ measure of the sun’s shape resulting from gravitational forces and motions alone,” says Hudson. “The corrected oblateness of the non-magnetic sun is 8.01 +- 0.14 milli arcseconds, near the value expected from simple rotation.”
Further analysis of RHESSI oblateness data may help researchers detect a long-sought type of seismic wave echoing through the interior of the sun: the gravitational oscillation or “g-mode.” Detecting g-modes would open a new frontier in solar physics—the study of the sun’s internal core. continued...
