domingo, 1 de mayo de 2011

ciencia


A Delicacy on Chinatown Plates, but a Killer in Water

The snakehead fish is prized for its healing properties in China, but has been illegal to import to the United States since 2002.
New York State Department of Environmental Conservation
The snakehead fish is prized for its healing properties in China, but has been illegal to import to the United States since 2002.
Officials this week arrested a Brooklyn vendor suspected of importing the illegal snakehead fish, a rapidly reproducing predator with such a voracious appetite it can wipe out entire schools of fish and destroy an ecosystem.
Toshiso Kosako quit as a nuclear adviser and criticized the government.

Japan’s Prime Minister Defends Handling of Crisis

Naoto Kan’s remarks came after an adviser resigned to protest what he called unsafe measures.

A System to Speed Up Forecasting Tornadoes

The Dallas-Fort Worth area is poised to test a system of weather forecasting based on a series of small radar devices that would replace a single Doppler monitor.

Court Lets U.S. Resume Paying for Embryo Study

Two federal appeals court judges ruled that the syntax of the law restricting such research left room for financing of work on stem cells created from embryos that were destroyed in the past.

Electrical Problems Force Delay in Shuttle Launching

Endeavour’s mission was postponed for at least three days for repairs to a system that powers the movement of the shuttle’s engines and flaps.
TITUSVILLE JOURNAL
Twelve miles from the Kennedy Space Center, Titusville, Fla., has provided shuttle mission souvenirs and memorabilia, as well as places to view launchings.

In Shuttle’s Waning Days, One of the Last Reasons to Cheer

As the countdown for Endeavour liftoff, the next-to-last shuttle flight, approaches, communities near the Kennedy Space Center prepare for the big day.
The Energy Department issued the first nuclear loan guarantee for the expansion of the Alvin W. Vogtle plant in Georgia.

Despite Bipartisan Support, Nuclear Reactor Projects Falter

The depressed price of natural gas has clouded the economics of new reactors, and the disaster in Japan has further weakened support for building plants.
Solar panels along Fifth Street in Fair Lawn, N.J. Residents elsewhere were upset they had not been notified before installation.

Solar Panels Rise Pole by Pole, Followed by Gasps of ‘Eyesore’

Installations have been popping up across New Jersey for about a year, but some residents worry aloud about the effect on property values.

The First Stars, Massive and Fast-Spinning

The first stars that dotted the universe were not only immense, but probably also fast-spinning, according to a new study that sheds light on the nature of stellar evolution.
Science Times: April 26, 2011
DUET
Jim Wilson/The New York Times
DUET "Life: A Cosmic Journey" relies not just on computer animation techniques, but on a wealth of digitized scientific data as well.
Computer power is transforming the sciences, giving scientists tools as important to current research as the microscope and telescope were to earlier scientists.
FINDINGS

A Generation’s Vanity, Heard Through Lyrics

After a computer analysis of three decades of hit songs, psychologists report finding a statistically significant trend toward narcissism and hostility in popular music.
SCIENTIST AT WORK | JESSE H. AUSUBEL
Jesse H. Ausubel

A Passion for Nature, and Really Long Lists

An environmental researcher has so far started four major international programs to survey the planet and catalog its biological diversity.

M.I.T. Media Lab Names a New Director

Joichi Ito is a 44-year-old Japanese venture capitalist who does not have a college degree but has worked with several Internet organizations and invested in start-ups.
GROWTH SWITCH The Hippo gene restraints the proliferation of heart cells in mice, left. Knock it out, and a heart grows to two and a half times bigger.

Hippo, Warts and Other Thugs of the Genetic Realm

Genes with colorful monikers may play a part in treating cardiac events.
Marc Hauser, a Harvard biologist, has been banned from teaching at the university, but the replication of his 2007 experiment supports his denial of any scientific misconduct.

A Journal’s Statement May Aid a Harvard Researcher Accused of Misconduct

The journal Science said Monday that Marc Hauser, the Harvard researcher whom the university accused last year of eight charges of scientific misconduct, has replicated an experiment he published in 2007.
Health News
Dr. Claudia Henschke led a study that backed cancer screening.

Review Casts More Doubts on a Lung Cancer Study

A confidential review of a continuing lung cancer study involving more than 50,000 patients found that doctors could not locate 90 percent of the patients’ consent forms.

Armadillos Can Transmit Leprosy to Humans, Federal Researchers Confirm

About a third of leprosy cases each year in the United States are a result of contact with infected armadillos.
More Multimedia

INTERACTIVE FEATURE: What Makes Music Expressive?

What makes music expressive? Quiz yourself based on new research.

SLIDE SHOW: The First Close-Ups of Mercury

NASA’s Messenger spacecraft sent back the first of what is expected to be 75,000 photographs during a yearlong investigation of Mercury.

SLIDE SHOW: Readers’ Photos: A Family’s Best Friend?

Photos and stories of pets that were viewed differently by family members.

INTERACTIVE FEATURE: Rock-Paper-Scissors: You vs. the Computer

Test your strategy against the computer in this rock-paper-scissors game illustrating basic artificial intelligence.

En este día...


ON THIS DAY

On This Day: May 1

On May 1, 1960, the Soviet Union shot down an American U-2 reconnaissance plane near Sverdlovsk and captured its pilot, Francis Gary Powers.
Go to article »
On May 1, 1907, Kate Smith, the American singer who was considered the "first lady of radio," was born. Following her death on June 17, 1986, her obituary appeared in The Times.

On This Date

1707The Kingdom of Great Britain was created as a treaty merging England and Scotland took effect.
1786Mozart's opera "The Marriage of Figaro" premiered in Vienna.
1941The Orson Welles film "Citizen Kane" premiered in New York.
1948The People's Democratic Republic of Korea (North Korea) was proclaimed.
1960The Soviet Union shot down an American U-2 reconnaissance plane near Sverdlovsk and captured its pilot, Francis Gary Powers.
1967Anastasio Somoza Debayle became president of Nicaragua.
1967Singer Elvis Presley married Priscilla Beaulieu in Las Vegas.
1971Amtrak went into service, combining and streamlining the operations of 18 intercity passenger railroads.
1992On the third day of the Los Angeles riots, Rodney King appeared in public to appeal for calm, asking "Can we all get along?"
1999The Mercury space capsule Liberty Bell 7 that Gus Grissom flew in 1961 was found in the Atlantic Ocean 300 miles southeast of Cape Canaveral, Fla.
2001Thomas E. Blanton Jr. became the second ex-Ku Klux Klansman to be convicted in the 1963 bombing of a church in Birmingham, Ala., that claimed the lives of four black girls. (He was later sentenced to life in prison.)
2003President George W. Bush landed in a jet on the aircraft carrier USS Abraham Lincoln off the California coast and, in a speech to the nation, declared major combat in Iraq over.
2009Supreme Court Justice David Souter announced his retirement effective at the end of the court's term in June. (He was replaced by Sonia Sotomayor.)

Current Birthdays

Tim McGraw, Country singer
Country singer Tim McGraw turns 44 years old today.
AP Photo/Dan Steinberg
Wes Anderson, Director
Director Wes Anderson turns 42 years old today.
AP Photo/Chris Pizzello
1925Chuck Bednarik, Football Hall of Famer, turns 86
1925Scott Carpenter, Former astronaut, turns 86
1939Judy Collins, Folk singer, turns 72
1945Rita Coolidge, Singer, turns 66
1951Dann Florek, Actor ("Law and Order: SVU"), turns 60
1954Ray Parker Jr., R&B singer, turns 57
1972Julie Benz, Actress ("Dexter," "Angel"), turns 39
1973Curtis Martin, Football player, turns 38

Historic Birthdays

47Joseph Addison 5/1/1672 - 6/17/1719
English essayist, poet and dramatist
56Benjamin Latrobe 5/1/1764 - 9/3/1820
British-born American architect and civil engineer
83Arthur Wellesley 5/1/1769 - 9/14/1852
English general; defeated Napoleon at the Battle of Waterloo (1815)
48Jose Alencar 5/1/1829 - 12/12/1877
Brazilian journalist, novelist and playwright
100Mary Harris Jones 5/1/1830 - 11/30/1930
American labor organizer known as "Mother Jones"
87Cecilia Beaux 5/1/1855 - 9/17/1942
American portrait painter
73Pierre Teilhard de Chardin 5/1/1881 - 4/10/1955
French philosopher and paleontologist
87Mark Clark 5/1/1896 - 4/17/1984
American army general during World War II and the Korean War
93Eugene Black 5/1/1898 - 2/20/1992
American financier; president of the World Bank (1949-62)
60Winthrop Rockefeller 5/1/1912 - 2/22/1973
American philanthropist and governor of Arkansas (1967-71)
71Terry Southern 5/1/1924 - 10/29/1995
American novelist and screenwriter

2d9-Doctor Arrowsmith-difteria infantil.avi

DOMINGO 1 DE MAYO DE 2011

El Doctor Arrowsmith y la investigación

Mirar hacia atrás en Medicina puede ser terrible o glorioso. Terapias ineficaces o crueles sin el más mínimo sentido científico se han aplicado hasta fecha reciente. Sin embargo, el siglo XX supuso la explosión del conocimiento científico de las bases de numerosas enfermedades, y principalmente, de las infecciosas. Se ha reeditado en fechas recientes la novela de Sinclair Lewis : Doctor Arrowsmith, escrita en 1925, donde se narra la historia de un médico vocacional en el mundo de la investigación, sus grandezas y sus miserias, las ambiciones y presiones que aparecen en ese ámbito. El protagonista no acepta fraudes ni anuncios precipitados de los descubrimientos científicos y mantiene una apuesta ética por la investigación. Todo esto en el año 1925, donde no había convenciones internacionales sobre la ética de la investigación.
John Ford dirigió en 1931 una adaptación cinematográfica de la novela. Unos de los fragmentos disponible en You Tube nos puede servir de ilustración de lo que era la difteria infantil en aquellos años. La vacunación contra la difteria es uno de los momentos gloriosos de la historia de la Medicina.