French National Scientific Research Center researchers have recently found through experiments, "rose the tree base" of the derivatives of many types of cancer with special effects, this discovery will contribute to the development of new anticancer drugs.
Researchers in the latest issue of "Cancer Research," the report said, "rose the tree base," a common Oceania rose from the leaves of the plant extract, which kill cancer cells by damaging DNA, significant effect. At the same time, it targeted poor, would "manslaughter" a lot of healthy cells, leading to serious side effects.
Reported that a large number of screening by the researchers, found a "rose tree base" of several derivatives, these derivatives on protein kinase CK2 has a special effect. Protein kinase in breast cancer and prostate cancer and other proliferation plays a key role, as it can inhibit the activity of cancer treatment more effective. Researchers in vitro and then tested on mice, are a success.
Claude Decaux, who led the team break, "said Rose Tree base" of these derivatives can inhibit tumor proliferation, while their highly targeted, the side effects is relatively small. The findings open new avenues for cancer treatment.
Sunday, December 26, 2010
Scientists manufacturing super shockproof materials
Japanese researchers recently developed a pure carbon material that has excellent vibration characteristics, not only extend the capacity of self-restitution, and cold and heat, may be used in the aviation industry and automobile manufacturing.
Japan Institute of Industrial Science and Technology Xu Ming, a materials scientist (phonetic) 2, told Reuters that the new material like thick honey, can be extended, self-recovery.
"It's like a hole in a metal sponge, which consists of trillions of dollars a diameter of 5 nm of carbon tubes, when you stretch it and then let go, it will slowly recover their original state," Xu said.
Publication is scheduled for 3, "Science" magazine said that because this material has good ductility, it has excellent shock performance. Meanwhile, in the aerobic environment, it can withstand temperatures ranging from minus 196 degrees Celsius to 1000 degrees Celsius.
"This is a new and unique materials. It can be used in space, space shuttle or rocket used in the manufacture of the fuel tank can also be used to make car engines, to suspension," Xu said, "At this stage , no other materials can have the same characteristics. "
He said that the extension of properties of some new materials such as rubber, but it has good conductivity, so a wider range of applications than rubber.
Japan Institute of Industrial Science and Technology Xu Ming, a materials scientist (phonetic) 2, told Reuters that the new material like thick honey, can be extended, self-recovery.
"It's like a hole in a metal sponge, which consists of trillions of dollars a diameter of 5 nm of carbon tubes, when you stretch it and then let go, it will slowly recover their original state," Xu said.
Publication is scheduled for 3, "Science" magazine said that because this material has good ductility, it has excellent shock performance. Meanwhile, in the aerobic environment, it can withstand temperatures ranging from minus 196 degrees Celsius to 1000 degrees Celsius.
"This is a new and unique materials. It can be used in space, space shuttle or rocket used in the manufacture of the fuel tank can also be used to make car engines, to suspension," Xu said, "At this stage , no other materials can have the same characteristics. "
He said that the extension of properties of some new materials such as rubber, but it has good conductivity, so a wider range of applications than rubber.
Super planet earth's atmosphere beyond 500 degrees Celsius
According to a study published, astronomers for the first time a so-called "super-Earth" the atmosphere is analyzed. Super Earth specifically refers to a rocky extrasolar planets, measuring the earth several times. The researchers said that in trying to identify other planets within the solar system on the road, this breakthrough is no doubt an important step forward. They pointed out that extrasolar planets may exist that we can identify the ecological patterns.
The main author of research paper, Harvard - Smithsonian Center for Astrophysics, Professor James Bu Bien said: "The Department of the outside world in the understanding of these characteristics on the road, we achieved a milestone." Bean, who study extrasolar planet is GJ 1214b, 42 light years from Earth (about 400 trillion kilometers) around the Earth's radius is about 2.6 times.
Astronomers in 2009 discovered the GJ 1214b. As a dim small stars around the operation, the scientists analyzed more easily through the GJ 1214b direction of the edge and moving toward the Earth the star light, extrasolar planet's atmosphere to get Fengyun data. The data related to GJ 1214b chemical composition of the atmosphere, weather and light absorbed by a specific wavelength of the signal. With the European Space Agency's Very Large Telescope in Chile, Bean and his colleagues be able to reduce the possibility of 2 from 3.
Since the short distance between the star, GJ 1214b presence of water on, probably by the form of steam. In addition, the planet's atmosphere, mainly by the hydrogen form, should be a rocky world, but high clouds or mist will block line of sight. Observational data show that Fengyun extrasolar planets is not a "mini-Neptune." It has a small rocky core, the atmosphere is thick and rich in hydrogen. Bean said: "Although we can not fully determine the composition of the atmosphere, but we have an exciting step forward one step, can be related to the possibility of such a distant world, reduced to two, namely, the existence of steam or smoke . "
The main author of research paper, Harvard - Smithsonian Center for Astrophysics, Professor James Bu Bien said: "The Department of the outside world in the understanding of these characteristics on the road, we achieved a milestone." Bean, who study extrasolar planet is GJ 1214b, 42 light years from Earth (about 400 trillion kilometers) around the Earth's radius is about 2.6 times.
Astronomers in 2009 discovered the GJ 1214b. As a dim small stars around the operation, the scientists analyzed more easily through the GJ 1214b direction of the edge and moving toward the Earth the star light, extrasolar planet's atmosphere to get Fengyun data. The data related to GJ 1214b chemical composition of the atmosphere, weather and light absorbed by a specific wavelength of the signal. With the European Space Agency's Very Large Telescope in Chile, Bean and his colleagues be able to reduce the possibility of 2 from 3.
Since the short distance between the star, GJ 1214b presence of water on, probably by the form of steam. In addition, the planet's atmosphere, mainly by the hydrogen form, should be a rocky world, but high clouds or mist will block line of sight. Observational data show that Fengyun extrasolar planets is not a "mini-Neptune." It has a small rocky core, the atmosphere is thick and rich in hydrogen. Bean said: "Although we can not fully determine the composition of the atmosphere, but we have an exciting step forward one step, can be related to the possibility of such a distant world, reduced to two, namely, the existence of steam or smoke . "
American scientists created the radar shoes
Widespread popularity of GPS devices to facilitate people's travel, but in some special signal blind area, GPS is still difficult to accurately locate the target and how to solve this problem has been a scientific study. U.S. researchers have invented a radar shoes, which can help blind users accurate positioning in the signal.
So far, the most commonly used GPS positioning signal blind approach is to use the inertial measurement unit (IMU). However, IMU need to target the last GPS location of the target to measure the speed and direction of a new position before, so when even a small measurement errors are likely to result in significant cumulative error, and the target loses contact with GPS time The longer, the error will be larger, IMU or even stop moving the goal will be judged as being slow-moving.
In response, North Carolina State University and Carnegie Mellon University research team invented a joint radar shoes, these shoes built a radar, the radar can be the distance between the foot and the ground for continuous tracking If this distance has not changed a long time, the system will determine the goal has been to stop movement, and this information is transmitted to the IMU. This improvement in the target stops moving so that its more accurate IMU positioning.
The radar shoes for underground workers, especially in tunnels and large frame structure is very useful for people who work, it can be in dangerous conditions for accurate positioning.
So far, the most commonly used GPS positioning signal blind approach is to use the inertial measurement unit (IMU). However, IMU need to target the last GPS location of the target to measure the speed and direction of a new position before, so when even a small measurement errors are likely to result in significant cumulative error, and the target loses contact with GPS time The longer, the error will be larger, IMU or even stop moving the goal will be judged as being slow-moving.
In response, North Carolina State University and Carnegie Mellon University research team invented a joint radar shoes, these shoes built a radar, the radar can be the distance between the foot and the ground for continuous tracking If this distance has not changed a long time, the system will determine the goal has been to stop movement, and this information is transmitted to the IMU. This improvement in the target stops moving so that its more accurate IMU positioning.
The radar shoes for underground workers, especially in tunnels and large frame structure is very useful for people who work, it can be in dangerous conditions for accurate positioning.
New helmets can reduce explosion brain damage
According to the American physicist organizational network reported that MIT researchers have developed a new type of helmet with a mask, allegedly this helmet can reduce the war and other reasons caused by explosions caused by traumatic brain injury ( TBI) from occurring. Research published in the United States, "National Academy of Sciences" on.
In order to study the impact of explosions on the human brain, MIT associate professor of aerospace Hertz and colleagues used a sophisticated three-dimensional computer model of the shock wave through the case of the brain were simulated. To make the model more realistic, with the U.S. Walter Reed Army Medical Center neurologist David Moore cooperation, the use of magnetic resonance imaging of the way to get a head feature data (such as the skull, soft tissue, brain spinal fluid, white matter, etc.), and obtained through the experiments of chemical energy released by explosions, electromagnetic pulses, and kinetic data on the impact on the surrounding objects. With this model, the researchers hope to determine ways to reduce brain damage, brain damage will be caused by the war's casualties to a minimum.
Through computer models, researchers found that the air compressed to 10 times the normal sea level pressure in front of an explosion is enough to power through the face, skull and soft tissues of the brain unprotected passed. To deal with this impact, the researchers designed a called the Advanced Combat Helmet (ACH) of the new protective gear, helmets, compared with the ordinary, this adds a helmet made of transparent polycarbonate mask. Experiments show that the helmet was delayed to some extent, the head shock wave arrival time, and reduce the area of the brain affected by the impact.
In order to study the impact of explosions on the human brain, MIT associate professor of aerospace Hertz and colleagues used a sophisticated three-dimensional computer model of the shock wave through the case of the brain were simulated. To make the model more realistic, with the U.S. Walter Reed Army Medical Center neurologist David Moore cooperation, the use of magnetic resonance imaging of the way to get a head feature data (such as the skull, soft tissue, brain spinal fluid, white matter, etc.), and obtained through the experiments of chemical energy released by explosions, electromagnetic pulses, and kinetic data on the impact on the surrounding objects. With this model, the researchers hope to determine ways to reduce brain damage, brain damage will be caused by the war's casualties to a minimum.
Through computer models, researchers found that the air compressed to 10 times the normal sea level pressure in front of an explosion is enough to power through the face, skull and soft tissues of the brain unprotected passed. To deal with this impact, the researchers designed a called the Advanced Combat Helmet (ACH) of the new protective gear, helmets, compared with the ordinary, this adds a helmet made of transparent polycarbonate mask. Experiments show that the helmet was delayed to some extent, the head shock wave arrival time, and reduce the area of the brain affected by the impact.
Scientists create antihydrogen atoms in the flight condition
CERN and Japan, RIKEN researchers to design an innovative particle trap device, the successful production of a certain number of flight, the anti-hydrogen atoms, which measures the anti-hydrogen atoms start over from ground state subtle transition. On this basis, their next step is expected to produce anti-hydrogen atomic beam, in order to better study the anti-matter, and thus CPT (charge, parity, time) symmetry and to test the basic theory of gravitation, for people to unlock the antimatter universe Mystery provide a powerful tool.
Named ASACUSA in this project, the researchers designed "Kasi Bo" trap (cusp trap) can take advantage of the combined effects of multiple magnetic fields, the collection of anti-protons and positrons together to form antihydrogen atoms. Then be imported into these anti-hydrogen atoms in the tube-like channels, showing flight, researchers can study it. Published in "Physical Review Letters," the study noted that more than 7% of the success of the anti-proton trap shooting Rukasibo formation of antihydrogen atoms. It is necessary to produce anti-hydrogen atomic beam preparation process. The ultimate goal of the experiment is to use this method of mass production of flight, the anti-hydrogen atoms, and their behavior with a more detailed microwave study.
Physics of antimatter is one of the most confusing. Why is the universe today, and not by the material composition is antimatter? The current on the best theory of the subatomic world - the standard model of particle physics can not answer. But scientists believe that properties of matter and antimatter may be small differences between the answers lie, and this difference is reflected in the violation of CPT symmetry theorems. CPT symmetry is to replace the particles with the anti-particle, the right hand into left-handed coordinate system, and the particle velocity reversal of all the laws of physics remain unchanged.
Named ASACUSA in this project, the researchers designed "Kasi Bo" trap (cusp trap) can take advantage of the combined effects of multiple magnetic fields, the collection of anti-protons and positrons together to form antihydrogen atoms. Then be imported into these anti-hydrogen atoms in the tube-like channels, showing flight, researchers can study it. Published in "Physical Review Letters," the study noted that more than 7% of the success of the anti-proton trap shooting Rukasibo formation of antihydrogen atoms. It is necessary to produce anti-hydrogen atomic beam preparation process. The ultimate goal of the experiment is to use this method of mass production of flight, the anti-hydrogen atoms, and their behavior with a more detailed microwave study.
Physics of antimatter is one of the most confusing. Why is the universe today, and not by the material composition is antimatter? The current on the best theory of the subatomic world - the standard model of particle physics can not answer. But scientists believe that properties of matter and antimatter may be small differences between the answers lie, and this difference is reflected in the violation of CPT symmetry theorems. CPT symmetry is to replace the particles with the anti-particle, the right hand into left-handed coordinate system, and the particle velocity reversal of all the laws of physics remain unchanged.
The United States launched the first star private spacecraft
8, a U.S. private company the company will launch the first spacecraft to orbit. As NASA prepared to allow a group of retired collectively the space shuttle, the launch is considered to be the future commercial space flight is an important test.
NASA said the space exploration technology company in the U.S. morning of 8 May in the southern Cape Canaveral, Florida launch space base named "Dragon" capsule. It is reported that "Dragon" will not fly to the space capsule the International Space Station, will conduct test flights around the earth twice, and then into the Pacific Ocean. If the project is ultimately successful, the capsule after the International Space Station program will be to undertake the task of transporting goods and people.
Previously, Obama has said the U.S. government welcomed the private sector or individuals to participate in the process of space development.
NASA said the space exploration technology company in the U.S. morning of 8 May in the southern Cape Canaveral, Florida launch space base named "Dragon" capsule. It is reported that "Dragon" will not fly to the space capsule the International Space Station, will conduct test flights around the earth twice, and then into the Pacific Ocean. If the project is ultimately successful, the capsule after the International Space Station program will be to undertake the task of transporting goods and people.
Previously, Obama has said the U.S. government welcomed the private sector or individuals to participate in the process of space development.
Japan Venus detectors have failed to enter orbit around the stars
Japan Aerospace Exploration Agency announced on the 8th, Japan's first Venus probe "dawn" was not scheduled to enter orbit around Venus. It is close to Venus once again have to wait until six years later.
Japan Aerospace Exploration Agency Venus probe out of the village project leader Masato 8 at the news conference that the adjustment process in the final orbit, the "dawn" was the reverse injection device failure, leading to it, and Venus, "rub Shoulder gone. "
According to reports, after the failure orbit, ground control center has worked with "dawn" was briefly lost contact, but then resumed communications. Detector itself does not seem to be any damage, is currently away from Venus, into an orbit around the sun in flight.
"Xiao" spacecraft was launched in May this year, after a long flight before reaching Venus nearby. Original plan, "Xiao" was more than 2 years to perform the detection task to investigate Venus volcanic activity, atmospheric composition and climate conditions.
This is the Japanese experience in the field of planetary exploration is another failure. Earlier, the Japanese launched to Mars in 1998, "Hope" probe, but failed continually forced to abandon in 2003.
Japan Aerospace Exploration Agency Venus probe out of the village project leader Masato 8 at the news conference that the adjustment process in the final orbit, the "dawn" was the reverse injection device failure, leading to it, and Venus, "rub Shoulder gone. "
According to reports, after the failure orbit, ground control center has worked with "dawn" was briefly lost contact, but then resumed communications. Detector itself does not seem to be any damage, is currently away from Venus, into an orbit around the sun in flight.
"Xiao" spacecraft was launched in May this year, after a long flight before reaching Venus nearby. Original plan, "Xiao" was more than 2 years to perform the detection task to investigate Venus volcanic activity, atmospheric composition and climate conditions.
This is the Japanese experience in the field of planetary exploration is another failure. Earlier, the Japanese launched to Mars in 1998, "Hope" probe, but failed continually forced to abandon in 2003.
The study says climate warming increase human have cancer risk
A UNEP study shows that with climate warming, melting glaciers, a significant increase in cancer risk that people will be released pollutants into the air and the sea.
These can be long-standing chemical called persistent organic pollutants, into the food chain will enter the human body to increase the cancer, the incidence of heart disease and risk of infertility.
United Nations Environment Programme, said professor Donald Cooper, although only a few persistent organic pollutants into the food chain, but they accumulate year, will reach an increasingly high level, but the end is the human food chain. Scientists have found that human breast milk and blood of such substances.
These can be long-standing chemical called persistent organic pollutants, into the food chain will enter the human body to increase the cancer, the incidence of heart disease and risk of infertility.
United Nations Environment Programme, said professor Donald Cooper, although only a few persistent organic pollutants into the food chain, but they accumulate year, will reach an increasingly high level, but the end is the human food chain. Scientists have found that human breast milk and blood of such substances.
Scientists find the "prime" of barley powdery mildew
British scientists found, barley and other cereals are often infected with the powdery mildew genome of the bacteria exist in a large number of parasite genes, "transposons", which is highly adaptable and powdery mildew can destroy the plant immune system "culprit." This important discovery to further understand the evolution of plant diseases and insect pests, powdery mildew prevention of infectious diseases such as development of new agricultural technology has great significance. The study, published in the latest issue of "Science" magazine.
Imperial College London, Department of Life Sciences, the study led by Dr. barley powdery mildew were on the genome decoding, the results show that the reason why the evolution of powdery mildew so fast because of its memory in the genome known as the "transposon "parasitic genes that change the plant is used to detect disease attacks the host molecules, the ability of bacteria to plant identification chaos. Transposons are a class of bacterial chromosomes, plasmids or phage genetic elements to move among themselves, is the genome with a specific characteristic of the independent DNA translocation sequence can be cut and re-integration process from a series of genomic a position "jumps" to another location.
Shipanboshi said: "powdery mildew in the number of transposon staggering. Generally speaking, the genome will try to maintain the transposon in the controllable range. But a breakthrough in the powdery mildew genome transposon transfer control to bacteria to adapt more quickly to changes in plants and damage their immune system. "
Imperial College London, Department of Life Sciences, the study led by Dr. barley powdery mildew were on the genome decoding, the results show that the reason why the evolution of powdery mildew so fast because of its memory in the genome known as the "transposon "parasitic genes that change the plant is used to detect disease attacks the host molecules, the ability of bacteria to plant identification chaos. Transposons are a class of bacterial chromosomes, plasmids or phage genetic elements to move among themselves, is the genome with a specific characteristic of the independent DNA translocation sequence can be cut and re-integration process from a series of genomic a position "jumps" to another location.
Shipanboshi said: "powdery mildew in the number of transposon staggering. Generally speaking, the genome will try to maintain the transposon in the controllable range. But a breakthrough in the powdery mildew genome transposon transfer control to bacteria to adapt more quickly to changes in plants and damage their immune system. "
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