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LOS ANGELES nike air max 95 just do it australia , July 25 (Xinhua) -- A technique called digital holographic microscopy, which uses lasers to record 3-D images, may help scientists spot extraterrestrial microbes, according to a NASA's new research.
"It's harder to distinguish between a microbe and a speck of dust than you'd think,"said Jay Nadeau, research professor of medical engineering and aerospace in Caltech's Division of Engineering and Applied Science, in a recent statement.
"You have to differentiate between Brownian motion nike air max 1 just do it australia , which is the random motion of matter, and the intentional, self-directed motion of a living organism," Jay Nadeau said.
Whereas standard microscopes can only view a thin slice of a drop of water, the new detection method, detailed in the journal Astrobiology, adds more.
The journal is recently publishing a special issue dedicated to the search for signs of life on Saturn's icy moon Enceladus.
Included is the new paper nike air force 1 just do it australia , co-authored by Chris Lindensmith of NASA's Jet Propulsion Laboratory and scientists from Caltech.
Enceladus, the sixth-largest moon of Saturn, has a lot of water-an ocean's worth, hidden beneath an icy shell that coats the entire surface. When the Saturn probe Cassini flew by Enceladus in 2005, it spotted water vapor plumes in the south polar region blasting icy particles at nearly 2,000 kilometers per hour to an altitude of nearly 500 kilometers above the surface.
Even if life does exist there in some microbial fashion, the difficulty for scientists on Earth is identifying those microbes from 790 million miles away.
To identify the motion of potential microbes from Enceladus's plumes nike air presto just do it australia , scientists propose using digital holographic microscope, in which an object is illuminated with a laser and the light that bounces off the object and back to a detector is measured, according to the study.
With holographic microscopy, scientists were able to identify organisms with population densities of just 1,000 cells per milliliter of volume, similar to what exists in some of the most extreme environments on Earth, such as subglacial lakes.
"Digital holographic microscopy allows you to see and track even the tiniest of motions cheap nike just do it australia ," Nadeau says.
Next, the team will attempt to replicate their results using samples from other microbe-poor regions on Earth, such as Antarctica, according to a press release.
BEIJING, Dec. 30 (Xinhua) -- China's first domestically produced regional jet was officially certified on Tuesday, marking a crucial step forward for the jet's entry into the market.
The ARJ21-700 won the certification after a series of examinations by the Civil Aviation Administration of China (CAAC) using the country's airworthiness standards.
The ARJ21, short for Advanced Regional Jet for the 21st Century nike just do it australia , is a type of regional airliner designed and manufactured by the Commercial Aircraft Corporation of China (COMAC).
There are 78 seats in a dual-class configuration and 90 seats in a full economy class configuration. Its economic life is designed for 60,000 flying hours or 20 calendar years.
The first ARJ21-700 jet was designed and manufactured between 2003 and 2007 and made its first test flight in November 2008. Since then, the jet has completed more than 5,000 hours of test flights.
After the CAAC started the jet's certification process in 2012, a total of 300 ground examinations and more than 1,141 hours of test flights were carried out, the CAAC said.
Certification is not the end of the process www.cheapjustdoitpackaustralia.com , said Luo Ronghuai, vice president of COMAC and also head of the ARJ21 project.
There must be a period for improving the model's design, systems and operations before its entry into the market, Luo said.
The jet will still need to gain brand recognition and market share in order to be a success, and eventually it must be able to bring profits to the airlines that use it, he said.
Li Jiaxiang, head of the CAAC cheap nike air max australia , rode the jet from Shanghai to Beijing on Tuesday, believing that "the jet can provide no less comfort than any plane I've ever taken."
After the certification, trial operations will be made. It will take at least three years to build systems for commercial operation and management.
The jet currently has 278 orders, COMAC data showed.
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Chinese military jet, vessel join search for missing AirAsia flight
BEIJING, Dec. 29 (Xinhua) -- China on Monday announced that it will send aircraft and vessel to join the search and rescue work for missing AirAsia flight QZ8501.
"After consultations with the Indonesian government, the Chinese government has decided to send aircraft and vessel to search for the missing AirAsia flight nike air max just do it australia ," the defense ministry said in a statement released Monday night.Full story
China jet captain jailed 3 yrs for crash killing 44
YICHUN, Heilongjiang, Dec. 19 (Xinhua) -- The captain of a passenger plane which crashed in northeast China four years ago was sentenced to three years in prison for misoperation.
The flight VD8387, which flied from Harbin to Yichun in Heilongjiang Province, crashed while attempting to land at the airport in Yichun on Aug. 24, 2010. The disaster killed 44 people, including the co-pilot nike air max australia , and injured 52 others.
Author Yu Qiuyu Photo: CFP
Considering the rumors that famed Huangmei Opera singer Ma Lan disappeared from the stage due to demands from her husband Yu Qiuyu, it comes as no surprise that after publishing a novel centered on a love story, that Yu would inevitably be swarmed with a ton of questions. Engulfed in a storm of controversies such as those about the cultural and historical mistakes found in his works, as well as his relationship with his much-younger wife, Yu hasn't had an easy time over the years since hitting his peak during the 1990s.
Maintaining a low-profile since these controversie. |
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