On February 23 (Thursday), the main content of well -known foreign scientific websites is as follows:
"Nature" website (www.nature.COM)
1, Car -T cell therapy for multiple sclerosis first enters the United States clinical trial
In the United States, the first clinical trials of engineering cells for multiple sclerosis have begun to recruit volunteers.EssenceDoctors have used this engineering cells called "Car-T cells" for blood cancer treatment.However, this active drug has not been approved for other diseases.CAR-T cells are a type of immune cells that collect the T cells in the patients body and edit it in the laboratory to make it a protein called chimeric antigen receptor (Cars), which is preciseRecognize the goal.When these CAR-T cells are re-injected into the main body, they will find and destroy target cells.Developers initially used CAR-T technology to find a method to eliminate abnormal proliferative immune cell B cells in blood cancer.Given B cells can also cause other autoimmune diseases, this cell therapy is also expected to treat these diseases.
2. Weber Space Telescope Unveil the Mystery of the Super Navigation: Solve the mystery of the star explosion 37 years ago
Weber Space Telescope (JWST) recently unlocked a mystery of long -term troubled scientists, one of the most famous star explosions in history.Astronomers used the Weber telescope to finally discover the signs of an ultra -high -density neutron star hidden in the core of the explosion. The neutron star was located in the galaxy running around the Silver River.37 years ago, a star exploded from the earth and reached the earth, and the supernova 1987A was born, which provided an opportunity to observe the death of star in close range.EssenceHowever, despite the in -depth research on the explosion of Supernova 1987A for many years, astronomers have not been able to determine that black holes are left after the explosion or neutron stars such as prediction.The Weber telescope did not directly observe the neutron star because it was still covered by the dust generated by the explosion, but the telescope detected the light from the 氩 atoms and sulfur atoms. These atoms were ionized or carried out by radiation from the long -looking neutron star.
"Science Times" website"Time Bomb": Long -term exposure to the blue light from smartphones and LED lights
A new study shows that long -term exposure to smartphones and LED office lightingUnder the blue light, it may have a bad effect on healthy and cellular levels.Blu -ray interference can cause blood glucose level imbalance.Therefore, researchers at the University of London, the University of London, pointed out that the lack of red light may become a "timing bomb" that lacks red light because it may lead to shortening life and diabetes.
Researchers believe that although the sunlight contains the balance of blue and red light, the modern living environment is mainly led by blue light, including LED lights with obvious colors.Blue light not only has adverse effects on physiology, but also causes blood sugar level disorders, which will cause diabetes. In the long run, it may shorten health.Scientists have found that excessive exposure to Blu -ray will damage mitochondria. Mitronum is a key part of cells produced by cells, which may further affect blood sugar levels and lead to aging.
2. From micro -analysis to nano -dialysis: new nano sensor can track brain tissue chemical composition with high resolution
Micro analysis is a minimally invasive sampling technology that is used to explore and monitor the chemical composition of biological tissues, which is particularly useful for neuroscience because it can reveal the complexity of the brain function.However, there are certain limitations of traditional micro -analysis.Because the minimum probe can only be sampled within a few square millimeters, this can only measure the average chemical component of the larger areas in the organization.
In order to cope with this challenge, experts from the University of Illinois in the United States have developed a silicon-based sensor to develop a silicon-based sensor to use microelectronics manufacturing technologyYou can collect chemical composition from a specific area in a very short period of time, with an efficiency of nearly 100%.It can monitor one -thousandth of the body area of the existing technologies and track the slight changes in chemical composition with sub -second resolution.Since the sensor is made of silicon with microelectronic manufacturing technology, it can be manufactured and deployed on a large scale.
3. The detector reveals the wider Koyber belt and challenge the previous understanding of the solar border
the United StatesThe "New Vision" detector of NASA (NASA), near the outer border of the Kuiper Belt on the periphery of the solar system, the level of interstellar dust has increased.Think more wider.
The Koyber belt is composed of cold rock objects and dwarf planets. Because of its darkness, it is still hidden outside the solar system, but the research on its internal dust reveals valuable information informationEssenceAlthough it was originally believed that the Kuiba belt extends to 50 astronomical units (AU), the record of the "New Field" at 60 astronomical units shows that due to the collision of the internal celestial body inside and the micro -dust impact from the interstellar space, the level of dust riseshigh.This discovery challenged our existing understanding of the foreign solar system and provided a new perspective for understanding its dynamics.
"Daily Science" websiteIt proposes to double the method of increasing the speed of computer processing, no need to add a processor
WEI TSENG) Possess the paradigm transformation of computer architecture in the papers of "Simultaneous and Heterogeneous Multithreading (SHMT") in recent "Simultaneous and Heterogeneous Multithreading).Zeng Hongwei explained that todays computer equipment is increasingly using GPUs, hardware accelerators or digital signal processing units used for artificial intelligence (AI) and machine learning as basic components.The unit moves to the next processing unit, which actually causes bottlenecks. By introducing the simultaneous and heterogeneous multi -threaded (SHMT) framework, you can use ARM multi -core processors, Nvida GPUs and Google TPUs (Google TPU)The accelerator can achieve 1.96 times acceleration and 51%reduced energy consumption without adding a new processor.This innovation can not only reduce the cost of computer hardware, but also help reduce the carbon emissions generated by the data processing center running the server.
2. Observed a quantity Hall effect in graphene: It is of great significance for the development of more powerful quantum computers
But in a very special material state, electrons can be split into a small part of its whole.This phenomenon is called "score charge" and is extremely rare. If it can be captured and controlled, this strange electronic state helps build a flexible, fault -tolerant quantum computer.So far, this phenomenon, known as the "quantity Hall effect", has been observed several times under the high and strict maintenance magnetic field.However, it was not until recently that scientists found this effect in materials without relying on strong magnetic fields.
Physicists at the MIT Institute of Technology have recently observed this elusive score charge effect in a more simple material -five -layer graphene.Graphene is a single atomic thick carbon material that superimposed to form a graphite and ordinary pencil core.They found that when the five -layer graphene stacked like a staircase, its structure itself provided appropriate conditions for electrons, so that it could pass through a part of the charge without requiring an external magnetic field assistance.
This discovery is the first evidence of the "divided quantic abnormal Hall effect" in the crystal graphene ("abnormal" ("abnormal" refers to the no magnetic field). This is a physicsScholars have never expected the effects in the material.
The Sett Technology Daily website (https://scitechDaily.com)
Scientists have proposed new strategies to prevent influenza dissemination
Researchers have already understood that some viruses and bacteria will initially depend on mammals (including humans) sinuses and throat cells on the surface of sugarOn the molecules, the infection is triggered.For example, virus particles can be combined with the molecules called Salic acid (SAS), similar to the combination of keys and locks.
Recently, the research team of NYU Grossman School of Medicine, New York University, found in a study for young rats that by blocking virus particles and salivaThe combination of acid molecules can not only limit the initial stage of type A influenza virus infection, but also prevents the virus from falling off and spread among hosts.This infection is the main cause of seasonal influenza, causing more than 36,000 Americans each year.Researchers say that although there are vaccine and symptoms of infection, they are not 100 % effective, so more strategies need to prevent the spread of infection.This discovery provides possibilities for the development of new prevention measures.(Liu Chun)
