On November 12 (Tuesday), the main content of well -known foreign scientific websites is as follows:
"Nature" website (www.nature.))
How to display the organs in the virtual embryo with accurate details
Stanford, USAA university research team draws the most detailed 3D cell diagram of the mouse embryo, nearly 8 million cell visualization so far.This diagram shows how the cells interact and migrate within two weeks after the embryo is pregnant, which can help researchers determine the cause of congenital diseases.
This grave reveals the structure of each major organs from the brain to the heart to the spinal cord in the embryo.And the asymmetric movement of the cells that form the four cavities of the heart growth.
Stem cell biologists said it has captured the complexity of a large number of cells, which is very important for researchers exploring mouse development mechanisms around the world.
This research is published in the "Cell" magazine.
In order to cultivate the "virtual" embryo, researchers have established a model called Spateo to stitch multiple types of data together.This includes the transcription group of each cell in about 90 tissue slices collected at two time points -or all RNA molecules involved in protein synthesis.Researchers can locate and record the transcriptional spectrum of each cell span space and time.
Researchers emphasized that Spateo can be used to draw the maps of any species, including data drawing maps using human embryo and organs.
"Daily Science" websitePhysicists create "Hurricane"
Modern living relying on the encoding information into the transmission tool to a large extent.A common method is to encode data with laser, and then send through the optical cable.We need to continue to find better coding methods for growing information capacity.
A research team in the Department of Applied Physics of the University of Alto in Finland found a new method to create a tiny -light hurricane -scientists call it a vortex-You can use it to carry information.This method is based on metal nanoparticles that operate with electric field interactions.This design method uses the geometric shape of the quasi -crystal.This discovery marks a major progress of physics and may bring a new way of information transmission.
The previous physics research has associated the symmetry of the vortex structure with the type of vortex.For example, if the nano -level particles are arranged in a square, there will be a single whirlpool generated by the light; the hexagon will produce twin vortex, and so on.More complicated vortexes need at least octagonal.
Now, the research team found a method that can theoretically support the geometric shape of any type of vortex.
In their research, the research team manipulated 100,000 metal nanoparticles, and the size of each nanoparticles was about one percent of a human hair to create to create to create a creation to create to create a creation to create to create a creation to create a creation of a human hair to create to create to create a creation to create a creation to create a creation to create to create a creation to create a creation of a human hair to create to create a creation of a human hair to create to create a creation to create to create a creation to create a creation of a human hair to create to create a creation of a human hair to create to create a creation of a human hair to create to create a creation of a human hair to create to create a creation of a human hair to create to create a creation of a human hair to create to create a creation of a human hair in orderTheir unique design.The key to this method is to find the position with the least interaction between particles and expectations of the electric field, not the largest position.
This discovery has opened up rich future research in the field of very active light topology research.It also represents an early stage of a powerful transmission method in the field of encoding information transmission (such as telecommunications).
Researchers explained that we can transmit these vortexes through fiber fiber cables and open them on their destinations.This will enable us to store information in smaller space and transmit more information at a time.Optimistic estimation is that this method can reach 8 to 16 times the current volume of optical transmission information.
This research was published on the Nature Communications in early November.
2. Researchers are making jet engine suitable for the hydrogen age
Flying around the world.To achieve this goal, engineers must develop a jet engine that provides them.The research team of the Federal Institute of Technology (ETH) in Zurich, Switzerland is conducting experiments, laying a necessary foundation for creating powerful and durable engines.
Europe is preparing for climatic neutral flights for sustainable production of hydrogen.Last year, the European Union launched a project to support the industrial and universities to develop hydrogen -powered medium -range aircraft.In addition, jet engines must adapt to new fuels of hydrogen.Todays engine is optimized for kerosene.
Researchers explained that the burning speed of hydrogen is much faster than that of kerosene, so the flame is more dense, so it must be considered when designing a hydrogen engine.The experiment of the research team provides an important foundation for this view.They just published research results in the magazine of Combustion and Flame.
Another problem is vibration, and engineers try to minimize it.When engineers develop todays kerosene engines, they must control these vibrations.They achieve this goal by optimizing the shape of the flame and the geometric shape and acoustic effect of the burning room.However, the type of fuel has a great impact on the interaction between sound and flames.This means that engineers and researchers must now ensure that they will not appear in the new hydrogen engine.
In their experiments, the researchers used a spray nozzle and then simulated the acoustic behavior of the nozzle collection because it would be arranged in the future hydrogen engine.This research will help engineers of aerospace companies optimize the spray nozzle and pave the road for high -performance hydrogen engines.A few years later, this engine should be able to perform preliminary testing on the ground. In the future, this engine is expected to promote the first hydrogen fuel aircraft.
3. Like humans, the performance of chimpanzees is also affected by the audience
When some audiences watch, our performance will become better or worse.At present, researchers at Kyoto University in Japan have published a report on the ISCIENCE of Cell (Cell) that the performance of the chimpanzee completion of computer tasks will be affected by the number of viewers.Researchers said the results showed that this "Audience Effect" was earlier than the development of human society based on reputation.
We will pay attention to who is looking at us, sometimes even subconsciously, which will affect our performance.Researchers want to figure out whether the effects of the unique audience of human beings also exist on non -human spiritual animals.
Although chimpanzees live in a hierarchical society, it is unclear to how much they will be affected by human observation.
Researchers have analyzed the process of completing thousands of touch screen tasks to complete thousands of touch screen tasks in six years, and finally concluded.
They found that in the three different digital tasks, chimpanzees performed better in the most difficult tasks, which is related to the increase in the number of experiments who observe them.In contrast, they also found that for the simplest task, when more experimenters or other familiar people were observed, the chimpanzee performed worse.
Researchers have pointed out that it is unclear that the specific mechanisms behind these audiences are unclear, even for humans.
Researchers believe that further research on non -human apes may help us understand the evolution process and its development reasons for this characteristic.
The Sait Technology Daily website (https://scitechDaily.com))
Research reveals that the cognitive ability of childhood affects the intelligence of the elderly
A milestone research project that has a milestone, revealing the aging of the brain and affecting the lifeImportant opinions of cognitive ability.This study was published in the latest issue of Genomic Psychiatry, which monitors unique monitoring of participants from childhood to 80.
Studies by the University of Edinburgh, the University of Edinburgh (The University of Edinburgh), can be traced back to the childhood cognitive ability -about half of the difference in intellectual test scores in the elderly -Interesting questions about the concentrated and acquired disputes in cognitive development.
Their main discoveries include: the difference between individuals of the same age at the same age; the DNA methylation model can predict the riskThe survival rate is correlated; the impact of genes on children and older intelligence is different.
Some of the most interesting discoveries are related to the brain structure and function.Using advanced imaging technology, researchers show the huge differences in brain health in the same age.This raises an important question: what factors lead to these differences, and whether they can change through lifestyle intervention.
This study also challenged some preconceived opinions on cognitive aging.Researchers have pointed out that we have learned that we usually think that the "cause" of the decline in the decline in elderly cognitive ability is actually actually the "result" of early cognitive differences, which fundamentally changed our views on brain health intervention.(Liu Chun)
