[quick news] historic announcement on April 10, 2019! The first black hole photo in human history is available today

Historic announcement! The first black hole photo in the history of mankind appears today The event horizon Telescope project, which cooperates with many researchers around the world, will release a "pioneering achievement" on the 10th, which is widely believed to be the first black hole photo ever obtained by mankind Black hole is a kind of massive celestial body with very strong gravity In a certain area around it, even light can not escape This boundary is called "event horizon" The event horizon Telescope project is composed of researchers from many countries and regions around the world They use radio telescopes distributed around the world to form a huge virtual telescope, whose diameter is equal to the diameter of the earth The project previously announced that two black holes are the focus of the virtual telescope's "photo shoot", one is Sagittarius A *, located in the center of the galaxy, and the other is located in the center of the super giant elliptical galaxy, code named M87 Http://www.xinhuanet.com/world/2019-04/09/c_.htm US scientists have confirmed that cancer cells can "Disarm" the immune system Researchers at the University of California, San Francisco, recently reported in the US cell journal that some cancer cells release small sacs called exosomes, which play an important role in avoiding immune attacks Exosomes carry the PD-L1 protein that disarms the immune cells Through the lymphatic system or blood, they reach the lymph node, the base of immune cells, and destroy the activity of immune cells at the source In order to prevent the body's immune cells from attacking, some cancer cells can release a secret weapon to destroy lymph nodes, so as to achieve the effect of "cutting corners" This explains why most cancers are not sensitive to existing immunotherapies and provides ideas for developing new therapies or even cancer vaccines The first author of the paper, Mauro bogey, a postdoctoral researcher at the University of California, San Francisco, said that currently there is no anticancer drug that can block the destructive power of PD-L1 protein exosomes in clinical practice Understanding its biological mechanism is the first step to develop new therapies Https://www.cell.com/cell/fulltext/s0092-8674 (19) 30165-5 micro nano scale "coat" makes controlled release fertilizer "smarter" Recently, the team of Professor Yang yuechao, National Engineering Laboratory of soil and fertilizer resources efficient utilization of Shandong Agricultural University, imitated the unique super hydrophobic micro nano bulge structure of lotus leaf, and prepared the super hydrophobic bio based controlled-release fertilizer coated with "air coat" by magnetic self-assembly method, which increased the nutrient controlled-release period by about one time Using lard as the raw material, the team first modified the magnetic nanoparticles with superhydrophobic property, then added the magnetic nanoparticles to the liquid membrane material In the magnetic field, the team used the interaction between the magnetic nanoparticles and the iron coating machine, through the continuous rolling of the fertilizer particles, the magnetic nanoparticles moved to the surface of the membrane shell spontaneously, arranged regularly, and fixed in the membrane material The super hydrophobic bio based controlled-release fertilizer with micro nano convex structure was formed Due to the existence of "air coat", liquid water can not directly infiltrate the membrane shell of superhydrophobic bio based controlled-release fertilizer, but can only enter the fertilizer slowly in the way of water vapor diffusion, which greatly improves the nutrient controlled-release characteristics of this kind of superhydrophobic bio based controlled-release fertilizer Http://digitalpaper.stdaily.com/http_www.kjrb.com/kjrb/html/2019-04/10/content_.htm? Div = - 1 The new "in situ vaccination" strategy may be able to transform tumors into cancer vaccine factories Recently, an article was published in the international journal Nature Medicine In the previous study report, scientists from Sinai Mountain hospital developed a new cancer immunotherapy, namely, injecting immune stimulants directly into tumors to train the immune system of the body to destroy tumors; this "situ vaccination" ）The results showed that the methods of breast cancer and head and neck cancer were well performed in patients with malignant lymphoma The new therapy involves injecting a series of immune stimulants directly into tumor sites The first stimulant can recruit dendritic cells in the body as "generals" of immune forces, and the second stimulant can activate dendritic cells to guide t Cells kill cancer cells and redundant non cancerous cells directly This immune "force" can learn how to recognize the characteristics of tumor cells in order to find and destroy cancer cells in time, and can also transform tumors into factories called cancer vaccines Https://www.nature.com/articles/s41591-019-0410-x continue to implement the special plan of colleges and universities, and strictly investigate and punish the violations issued by the Ministry of education on September 9 In the notice on the recruitment of students from rural and poverty-stricken areas by key universities in, it was made clear to continue to implement the national special plan, local special plan and university special plan, requiring all schools in all regions to strictly determine the conditions for application, strengthen the joint examination of qualifications, and standardize the enrollment management It is specially proposed in the notice that the poverty-stricken counties in the implementation area of the national special plan can still enjoy the national special plan policies in 2019 after poverty alleviation Relevant provinces (districts and cities) shall strictly implement the implementation areas determined in the national special plan and shall not expand the scope without authorization According to the notice, violations will be dealt with strictly The examinees who forge, alter, tamper with or fake the personal information such as the student registration of household registration and provide false application materials shall be deemed as cheating in the national education examination, and the special plan registration and admission qualification shall be cancelled At the same time, the relevant provincial recruitment and examination institutions or the education administrative departments shall cancel the registration, examination and admission qualification of the year's college entrance examination, and suspend the participation according to the seriousness of the circumstances Plus all kinds of national education examination for one to three years http://www.moe.gov.cn/srcsite/A15/moe_776/s3258/201904/t20190408_377031.html