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· Technology enterprises ·

Google: Ban unscientificmedical ads on its platform

Over the weekend, Google unveiled a new policy on medical advertising. The new policy makes it clear that Google will ban the release of unproven or experimental medical technologies on its platforms, including most stem cell therapies, cell therapies and gene therapies. In addition, Google will ban medical advertising without a scientific basis. Still, Google allows advertising of clinical trials and allows doctors to inform the public about the findings. Google says the policy is designed to prevent outlaws from offering deceptive treatments that harm users' health.

· Astronomy ·

First Black Hole Video Expected in 2020

On September 5th the Event Horizon telescope (EHT) team, which had just won the Science Breakthrough Award, announced exciting new developments. Its project leader, Shepard Dullman, says the first black hole video is expected to be available by 2020. So far, the team has enough observationdata, and they are analyzing it. This black hole video reveals how the black hole at the center of the Milky Way, SgrA, devours the surrounding gas cloud and evolves over time.

· Physics ·

Scientists accurately measure proton radius

The exact radius of protons remains a mystery. For a long time, physicists thought that protons had a radius of 0.877 flying meters (1 flying meters, 10 to 15 meters), but in 2010, the radius of protons was measured to be 4% smaller than previously thought. In the postScienceIn the new study, scientists from the University of York have proposed a new method of measuring the radius of protons by measuring the extended distance of the positive charge of protons. The proton radius obtained by this method is 0.833 meters, which is nearly 5% smaller than expected before 2010, and the results of the 2010 experiment are also accurate.

· Medical ·

E-cigarettes have been found to be co-ill

Recently, the United States has frequently reported rare and special cases, these patients have used e-cigarettes before the on-the-you-hand disease, so also known as e-cigarette-related respiratory disease. Recently published in theNew England Journal of MedicineThe previous study found that the lungs of these patients were filled with lipid-rich macrophages. The samples of six new cases provided by the University of Utah Hospital showed the same condition. The findings allow doctors to diagnose the new condition more quickly without misdiagnosing it as a virus or bacterial pneumonia, providing a more precise treatment plan.

· Space ·

India determines exact location of Moonboat 2 lander

On September 8th Siwang, the president of the Indian Space Research Organization, said they had identified the exact location of the previously disconnected Vikram lander, but were unable to establish a communications connection with it. Currently, the Moonboat 2 team is analyzing the sensor data in an attempt to find out what caused the signal outage. On September 7, the Vikram lander, which had previously been separated from the Moonship 2 spacecraft, attempted a soft landing at the moon's south pole, but the lander suddenly lost its signal 2.1 km from the moon's surface. According to the analysis, the lander may have crashed on the lunar surface.

· Medical ·

2016 trial to cure SIV can't be repeated

In 2016, a team of researchers provided standard antiviral therapy for monkeys infected with the monkey immunodeficiency virus (SIV), an antibody injected in the study, which is primarily used to attack the alpha4 beta7 protein. Nine months after the suspension, the monkeyshow showed no signs of relapse and the monkey immunodeficiency disease was cured, according to a paper published in Science at the time. Recently, however, three Science papers were published at the same time, indicating that the results could not be repeated.

WhereAThe virus used in the 2016 study was sequenced and found that its key genes had termination cositends, so the virus used at the time was likely to belong to an SIV variant rather than a wild virus;Second paperIt was found that in animals that began antiviral therapy during acute or chronic infection, a viral rebound would occur after treatment was stopped, even if there was an antibody input of alpha 4 beta 7;Third paperIt is pointed out that from the virological level, these treatments in the body has no continuous control effect. This means that, whether it is fakeors or not, the experiment sat three years ago did not contribute to progress in the field.

· Materials Science ·

Chinese scientists fold atomic-grade graphene for the first time

At present, there are still great challenges in precisely constructing and regulating low-dimensional carbon nanostructures based on graphene at the single atomic level. In the postScienceIn the latest study, the research team of the Institute of Physics of the Chinese Academy of Sciences has for the first time realized a precise, controlled folding of graphene nanostructures at the atomic level and customized on demand, and constructed a new type of quasi-three-dimensional graphene nanostructure. This is the world's smallest scale graphene folding, for the construction of quantum materials and quantum devices and other important.(CCTV News)

Wen: Wu Fei, Yang Xinzhou, Ma Yixuan, Xie Yu

Editing by Yang Xinzhou and Wu Fei