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China develops unique heat-resistant material for hypersonic aircraft
By Liu Xuanzun Source:Global Times Published: 2019/4/28 17:47:22

Chinese composite can withstand over 3,000 C for extended periods

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Pictured is an illustration of US experimental hypersonic aircraft Falcon HTV-2. Photo: IC

Chinese scientists have developed a new heat-resistant material for hypersonic aircraft which can endure over 3,000 C from friction caused by a Mach 5-20 flight within the atmosphere.

The lead scientist on the project said the material outperforms all similar foreign-made ones with its high melting point, low density and high malleability.

The new material enables a hypersonic aircraft to fly at Mach 5-20 within the atmosphere for several hours, as the high heat resulting from the friction between the aircraft and the air reaches between 2,000 C to 3,000 C, a temperature normal metal would not be able to endure.

Normal metals melt at around 1,500 C, but this new material can bear over 3,000 C for an extended period, state-owned Hunan Television reported recently.

Unlike foreign technologies that use traditional refractory metals and carbon-carbon materials, the China-made new material is a composite of ceramics and refractory metals, Fan Jinglian, the lead scientist who developed the material and a professor at Central South University in Central China's Hunan Province, told the Global Times.

The combination of ceramics and refractory metals makes the material far more efficient than foreign-made ones, and this technology is world-leading, Fan said.

In a simple analogy, Fan likened her composite to concrete cobble. "Think of the ceramics as the cobblestones, or the pellets, and the refractory metals are like the concrete. In high temperatures, the ceramics will act as pellets that pin the refractory metals, so they will not soften and deform."

As a result, the material not only has a high melting point, but also valuable characteristics such as low density and high malleability, according to the Hunan Television report.

China launched a major hypersonic aircraft project in 2009, and most Chinese scientists considered using carbon-carbon materials instead of metals back then.

Fan was questioned for her proposal to use such a material, but she insisted on making a sample, which came into being in 2012 and showed great potential.

As of March, the material has been used for products in a variety of fields including aviation, space exploration, shipbuilding and national defense, Hunan Television reported.

Hypersonic aircraft is not the only area in which materials made of ceramics and refractory metals can shine, Fan said. Any field that involves extreme high temperature, such as engines, space rockets and nuclear reactors, will have a great demand for the material, Fan noted.

China launched the Xingkong-2 waverider hypersonic flight vehicle via a rocket in a target range located in Northwest China in August 2018.

On Tuesday, East China's Xiamen University launched the Jiageng-1 hypersonic aircraft with a double-waverider design.

The test was part of the university's project to try to quintuple the current speed of civil aircraft to achieve global direct access within two hours, the Xinhua News Agency reported on Tuesday.

It is unknown whether Fan's material was used in these two cases.
 
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ShenGuang-Ⅱ 5PW laser facility starts operation----Shanghai Institute of Optics and Fine Mechanics
Update time: 04-25-2019

Femtosecond Peta-Watt (PW) laser facilities are important platforms for strong field physics research. Many countries and laboratories have carried out studies and developments of such large laser facilities. However, output characteristics of the PW lasers are different from other types of laser devices. Laser pulse with hundreds of nanometers in spectral bandwidth and high contrast on petawatt power scale must be focused up to the diffraction limit. To a large extent, it demands the spatiotemporal characteristics and beam directivity. Without other characteristics, a very high parameter such as power or energy can not guaranttee the laser’s availability for physical experiment. Until now, there are very few fs-PW laser facilities that can operate stably and serve physical experiments.

The National Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and fine Mechanics, Chinese Academy of Sciences, (NLHPLP, SIOM, CAS), have independently designed and constructed the SG-II 5PW laser facility, taking advantage of SG-II laser facility as high-quality pump source.

In the laboratory, optical parametric chirp pulse amplification (OPCPA) is adopted as the general technical route. With three OPCPA amplification stages, SG-II 5PW laser will be capable of delivering 150J/ 30 fs to the target. Figure 1 shows the layout of SG-II 5PW laser. The device was designed in pursuit of high-quality output laser performance, independent operation and combined operation with other laser beams of SG-II laser facility. After the completement of SG-II 5PW laser facility, it will become an organic component of the integrated SG-Ⅱ laser-physics platform, which is multi-functional and can realize target shooting with pulses of various duration, energy, wavefront and light frequency.

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Figure 1. The layout of SG-Ⅱ 5PW laser facility.

The construction status of SG-II 5PW facility is divided into two phases: Phase-I is the validation of petawatt laser output, and Phase-II is to promote output stability and controllability in order to meet the demands of experiment. At present, the output has reached 1.76 PW with the prior two OPCPA stages. The output of 5PW can be expected after the installation of large aperture LBO crystal (high deuterated DKDP crystal optional) for the third stage of OPCPA. For Phase-II, two rounds of online experiments, carried out since 2018, have greatly improved the comprehensive performance of the laser facility: 1) the conversion efficiency of the high energy optical parametric amplifier is 41.9%, which is the highest result reported internationally; 2) with the installation of the aberration pre-compensation unit for the whole system, the full-spectrum static optical focal spot diameter after the adaptive optical (AO) correction is measured less than 4.4 μm by CCD in the target chamber (Fig. 2 (a) (b)), and the focal-spot size is approaching the ideal diffraction limitation, which is parallel with the similar devices; 3) the full-aperture Signal to Noise Ratio (SNR) measured near the focal spot is better than 108:1 (Fig. 2 (c)).

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Figure 2. (a) the static optical focal spot measured by CCD with full spectrum, (b) the static distribution of focal spot along longitudinal and transverse axis, (c) SNR measured near the focal spot.

In March 2019, based on the accomplishment of SG-Ⅱ 5PW performance optimization, the group of Prof. ZHU Jianqiang and Prof. XIE Xinglong from SIOM together with the team from Shanghai Institute of Laser Plasma, China Academy of Engineering Physics, have jointly completed a latest round of proton acceleration experiment.

In the experiment, the flat copper targets of various thickness were adopted to interact with the laser pulses. The X-ray focal spot size (FWHM) measured by pinhole camera was 21μm*21μm (Fig. 3 (a)) and the proton acceleration kinetic energy of more than 16MeV was obtained for 5μm-thick copper target. Fig. 3 (b) is the patterns recorded by RCF, the spatial distribution of which is uniform as shown in Fig. 3 (c). Both strength and mass of the proton beams can meet the needs of proton imaging experiment. A focused density exceeding 1020W/cm2 can be deduced reversely by the proton acceleration kinetic energy.

In this physical study, 10 shots of high-energy laser have been completed, and 9 of them were successful. Using the copper targets with thickness ranging from 0.8 m to 20 m, the measuring results of the proton acceleration were all appreciable.

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Figure 3. (a) X-ray focal spot distribution measured by pinhole camera under high-energy shooting, (b) RCF film recording pattern in proton acceleration experiment, (c) proton beam spatial distribution recorded by RCF.

The results prove that SG–II 5PW laser facility has achieved stable operation. It can carry out routine physical experiments in petawatt scale, which currently makes it one of the few specialized laser facilities worldwide. The development of SG–II 5PW laser facility upgrades the development of the ultra-short pulse laser technology and engineering in NLHPHP since 1990s. With SG–II 5PW laser facility, the SG-II integrated experimental platform have the ability of delivering laser pulses of nanosecond high-energy, picosecond PW and femtosecond milti-PW scales.

It has also promoted cooperation among the teams from China, Hungary and the Czech Republic, which are installing the ELI facilities. Their joint experiments are planned in the summer of 2019. This facility has contributed to the completion of a collaborative physics project with the Hebrew university team in Israel and continues to support an ongoing research in laser plasma effects. In the future, more extensive and in-depth joint researches with laser-physics teams, both domestically and overseas, can be expected from this platform.
 
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NEWS RELEASE 30-APR-2019
Historic number of women elected to National Academy of Sciences
The National Academy of Sciences announced today the election of 100 new members and 25 foreign associates in recognition of their distinguished and continuing achievements in original research.

NATIONAL ACADEMIES OF SCIENCES, ENGINEERING, AND MEDICINE

WASHINGTON -- The National Academy of Sciences announced today the election of 100 new members and 25 foreign associates in recognition of their distinguished and continuing achievements in original research. Forty percent of the newly elected members are women -- the most ever elected in any one year to date.

...

Historic number of women elected to National Academy of Sciences | EurekAlert! Science News
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Two of the newly elected foreign associate are from China,

Gao, George F.; director general, Chinese Center for Disease Control and Prevention; dean, medical school, University of Chinese Academy of Sciences; vice president, National Natural Science Foundation of China; and professor, Institute of Microbiology, Chinese Academy of Sciences, People's Republic of China (People's Republic of China)

Yan, Nieng; Shirley M. Tilghman Professor of Molecular Biology, department of molecular biology, Princeton University (People's Republic of China)​
 
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Chinese scientists develop new catalyst to turn CO2 into clean liquid fuel
Source: Xinhua| 2019-05-01 08:43:06|Editor: Liu

HEFEI, May 1 (Xinhua) -- Chinese researchers have developed a new catalyst to convert carbon dioxide, the main greenhouse gas, into methanol, widely considered a clean fuel for engines.

A research team, led by Zeng Jie with the University of Science and Technology of China, developed a catalyst based on single atoms of platinum, which can effectively turn carbon dioxide into methanol under an atmospheric pressure of 32 bars and at 150 degrees Celsius.

The selectivity of the platinum-based catalyst for methanol stands at 90.3 percent, about 10 percentage points higher than the commonly used catalyst based on copper, zinc and aluminium.

"The study provides a new method to produce methanol with high purity and will help scientists better understand the mechanism of single-atom catalysis," Zeng said.

The study was published in the academic journal Nature Communications.

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NEWS * 01 MAY 2019
Biggest Denisovan fossil yet spills ancient human’s secrets
Jawbone from China reveals that the ancient human was widespread across the world — and lived at surprising altitude.

Matthew Warren
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A Denisovan jawbone was discovered on Tibetan Plateau at an altitude of more than 3,000 metres.Credit: Dongju Zhang, Lanzhou University

Scientists have uncovered the most complete remains yet from the mysterious ancient-hominin group known as the Denisovans. The jawbone, discovered high on the Tibetan Plateau and dated to more than 160,000 years ago, is also the first Denisovan specimen found outside the Siberian cave in which the hominin was uncovered a decade ago — confirming suspicions that Denisovans were more widespread than the fossil record currently suggests.

The research marks the first time an ancient human has been identified solely through the analysis of proteins. With no usable DNA, scientists examined proteins in the specimen’s teeth, raising hopes that more fossils could be identified even when DNA is not preserved.

“This is fantastic work,” says Katerina Douka, an archaeologist at the Max Planck Institute for the Science of Human History in Jena, Germany, who runs a separate project aiming to uncover Denisovan fossils in Asia. “It tells us that we are looking at the right area.”

Hunting for Denisovans
Until now, everything scientists have learnt about Denisovans has come from a handful of teeth and bone fragments from Denisova Cave in Russia’s Altai Mountains. DNA from these remains revealed that the Denisovans were a sister group to Neanderthals, both descending from a population that split away from modern humans about 550,00–765,000 years ago. And at Denisova Cave, the two groups seem to have met and interbred: a bone fragment described last year belonged an ancient-human hybrid individual who had a Denisovan father and Neanderthal mother.

But many expected that it was only a matter of time before researchers found evidence of Denisovans elsewhere. Some modern humans in Asia and Oceania carry traces of Denisovan DNA, raising the possibility that the hominin lived far away from Siberia. And some researchers think that unclassified hominin fossils from China could be Denisovan.

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The latest specimen, described in Nature1, consists of half a lower jaw, with two complete teeth. A monk found it in Baishiya Karst Cave in China in 1980, and passed on to Lanzhou University. But it wasn’t until the 2010s that archaeologist Dongju Zhang and her colleagues began studying the bone.

The team faced a problem. The Denisova Cave remains had all been identified because they still contained some DNA, which could be compared with genetic sequences from other ancient humans. But there was no DNA left in the jawbone.

Instead, the scientists looked for ancient proteins, which tend to last longer than DNA. In dentine from the teeth, they found collagen proteins suitable for analysis. The team compared these with equivalent proteins in groupsincluding Denisovans and Neanderthals, and found that they lined up closest with sequences from Denisovans.

The team were also able to piece together other snippets of information about the individual. One of the teeth was still erupting, for example, leading the authors to speculate that the jawbone belonged to an adolescent.

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A virtual reconstruction of the jawbone.Credit: Jean-Jacques Hublin, MPI-EVA, Leipzig

Previous research2 identified Neanderthal remains using both proteins and DNA — but the success of the latest study could lead to a greater emphasis on getting ancient proteins out of fossils that haven’t yielded DNA, says Chris Stringer, a palaeoanthropologist at the Natural History Museum in London. The method could prove particularly useful for older samples or those from southeast Asia and other warm climates, where DNA degrades quickest.

But the field is still in its early stages, Stringer adds, and ancient-protein analysis currently has a smaller sample of early hominins for comparison than does DNA analysis. “Although it’s certainly very suggestive of a link with the Denisovans, I think I’d like to see bigger samples to really pin that down more,” he says.

Douka agrees: for now, ancient DNA analysis remains the “gold standard” for this kind of work, she says. Although there is no genetic material in the jawbone, Douka wonders whether researchers could still find DNA in the Tibetan cave — perhaps in sediment.

The Roof of the World
The altitude of the new Denisovan’s home — 3,280 metres above sea level — surprised researchers, and helps to solve a mystery about Denisovans’ genetic contribution to modern Tibetans (see ‘Denisovan hang-outs’). “It is astonishing that any ancient humans were at that altitude,” says Stringer.

Some Tibetans have a variant of a gene called EPAS1 that reduces the amount of the oxygen-carrying protein haemoglobin in their blood, enabling them to live at high altitudes with low oxygen levels. Researchers3 had thought that this adaptation came from Denisovans, but this was difficult to reconcile with Denisova Cave’s relatively low altitude of 700 metres. The latest study suggests that Denisovans evolved the adaptation on the Tibetan Plateau and passed it to Homo sapiens when the species arrived around 30,000–40,000 years ago, says co-author Frido Welker, a molecular anthropologist at the University of Copenhagen. If Denisovans in Asia were adapted to high altitudes, similar sites could harbour more of their remains.

He points to Sel’Ungur cave in Kyrgyzstan, about 2,000 metres above sea level, where a hominin child’s arm bone was found but did not yield any DNA. “Now I ask myself — maybe that specimen is also a Denisovan and not a Neanderthal, like we usually assume,” says Bence Viola, a palaeoanthropologist at the University of Toronto in Canada.

Re-evaluating fossils
And the fossil is likely to prompt scientists to reconsider the classification of other remains. “We can kind of work ourselves through the fossil record, and link up more and more specimens with the Denisovans,” says Viola.

One candidate is a jawbone known as Penghu 1, which was caught in a fishing net near Taiwan and has many similarities to the latest mandible. Welker and his colleagues hypothesize that this jaw could be Denisovan — but the ultimate proof will come from DNA or protein analysis, says Welker.

Sampling any remains for proteins or DNA is by its nature destructive, so there must good justification for doing so, he adds. “It’s not a light-hearted decision to make.”


Biggest Denisovan fossil yet spills ancient human’s secrets | Nature

Fahu Chen, Frido Welker, Chuan-Chou Shen, Shara E. Bailey, Inga Bergmann, Simon Davis, Huan Xia, Hui Wang, Roman Fischer, Sarah E. Freidline, Tsai-Luen Yu, Matthew M. Skinner, Stefanie Stelzer, Guangrong Dong, Qiaomei Fu, Guanghui Dong, Jian Wang, Dongju Zhang & Jean-Jacques Hublin. A late Middle Pleistocene Denisovan mandible from the Tibetan Plateau. Nature (2019). DOI: 10.1038/s41586-019-1139-x
 
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China’s science silk road - Nature
How China is redrawing the map of world science
The Belt and Road Initiative, China’s mega-plan for global infrastructure, will transform the lives and work of tens of thousands of researchers.

By Ehsan Masood
1 MAY 2019

On a freezing November morning, Ashraf Islam is 3,000 kilometres from his family in balmy Bangladesh, but the weather is far from his mind as he gushes about the science opportunities he has encountered in Beijing.

“We have good facilities at home, but the facilities here are nothing like what I’ve used before,” says Islam, who is working towards a PhD in China researching techniques to remove organic matter from wastewater, an acute problem in Bangladesh.

Htet Aung Phyo, a PhD student from Myanmar, is using his Chinese-funded fellowship in Beijing to develop ways to use bacteria to extract copper from low-grade ore. If his project succeeds, it could help to extend the lives of copper mines in Myanmar, some of which are operated by a Chinese company. A breakthrough would also mean more jobs in his own country. “This is why I am here,” he says proudly.

Phyo and Islam are two of 1,300 graduate students from dozens of countries who are spending up to four years in Beijing carrying out research to help solve scientific problems back home. Two hundred positions are funded each year by the Chinese Academy of Sciences (CAS) in conjunction with The World Academy of Sciences (TWAS) in Trieste, Italy. But this is no ordinary fellowship scheme. Each of the 200 is a small part of the Belt and Road Initiative (BRI), the world’s largest programme of loans and investments, including some grants, which China is brokering with 126 countries.

Across much of the world, China’s government, companies and local business partners have been building motorways, designing high-speed rail, mining fossil-fuel reserves, switching on power plants, installing thousands of surveillance cameras and unveiling air and sea ports (see ‘Making connections’). This is all part of a vast venture conceived by President Xi Jinping to transform global trade networks that both supply China and provide a market for its products.

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Sources: World bank: go.nature.com/2ddj42p; Road and rail lengths: go.nature.com/2xspngh; Biodiversity: go.nature.com/2vbnbzq
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Source: http://go.nature.com/2xspngh

Xi and other Chinese leaders see science as a central element in building bridges with other countries and Bai Chunli, president of CAS, emphasized that point last year in the Bulletin of the Chinese Academy of Sciences (CAS Bulletin). “Science, technology and innovation are the core driving force for the BRI development,” he wrote.

For the past six months, Nature has been travelling to countries participating in the BRI. From Beijing to Islamabad, Colombo to Nairobi to Lima, we are exploring in a series of five articles over the next two weeks how China is transforming the world of science. China’s universities — along with a vast network of CAS institutes — are fanning out across the globe. They are offering scientific assistance and signing collaborative agreements on a scale not seen since the United States and the former Soviet Union vied with each other to fund researchers in allied nations during the cold war. On 19 April, Bai announced that CAS has invested more than 1.8 billion yuan (almost US$268 million) in science and technology projects as part of the BRI.

In Sri Lanka, China is co-funding a centre focused on safe drinking water and supporting investigations into a kidney-disease crisis in the country’s rural population. In Pakistan, it is co-sponsoring a range of research centres that are studying topics from rice agriculture to artificial intelligence and railway engineering. In the heart of the European Union, a Chinese–Belgian science park provides homes for companies trying to expand trade in medical devices, solar power and other technologies. And in South America, China has partnered with Chile and Argentina on astronomical centres and has gained access to some of the best observatories in the world. In total, the scientific side of the BRI involves tens of thousands of researchers and students, and hundreds of universities. There are few regions of the developing world where China’s scientific outreach does not have a footprint.

This marks a profound shift in where low- and middle-income countries are drawing scientific support — a sphere in which China is emerging as a competitor to the United States, Japan and the wealthier European nations. And as China rises as a science-development superpower, it brings a different perspective from those of other leading science nations.

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China has been supporting dam construction in southeast Asia, including the Nam Tha 1 hydropower plant in Laos. Credit: Taylor Weidman/Bloomberg/Getty

First, there is the concept of win–win that pervades all BRI projects, says Theresa Fallon, director of the Centre for Russia Europe Asia Studies in Brussels. Every major investment brings benefits not only to the host country but also to China, which is hoping to gain both scientifically and economically from the ventures. Another difference is that China sees itself as a more appropriate partner for poorer nations because it still recalls what it was like to be poor, says Li Yin, deputy director of CAS’s international cooperation department in Beijing.

China’s approach through the BRI has earned it many fans in countries where it has invested, including Sri Lanka’s President Maithripala Sirisena and Pakistan’s Prime Minister Imran Khan. Khan said in his victory speech last year that he’s keen to learn how China went from being a poor country to an emerging superpower.

But there’s another view of China’s scientific rise — the narrative that low- and middle-income countries are sleepwalking into the arms of an authoritarian and neocolonial state, and that everything else, including technology agreements and research alliances, are part of that trajectory. In this narrative, struggling nations are sagging under billions of dollars of debt to China and are giving away the keys to untold amounts of economically valuable and sensitive resources — from oceanic-current readings to biological samples to next-generation communication systems. Another concern is that China is only now beginning to acknowledge the environmental harm that BRI projects could cause as they pave routes through ecologically fragile habitats in Pakistan’s northern mountains and other regions, and dam up rivers across southeast Asia and South America.

From a science perspective, the overall goal of the BRI is clear — to restore China’s place as one of the world’s great civilizations, and that includes being seen by all other nations as a source of scientific power, too. But Christopher Cullen, a historian of Chinese science at the Needham Institute in Cambridge, UK, says it is too early to say how China’s dealings with other countries will evolve.

Many Paths
For well over 2,000 years, the silk roads linked the Far East to Europe, and Chinese leaders have been invoking the rhetoric of reviving these ancient trade routes since the early 2000s. But when Xi became China’s president in 2013, he made this goal a priority as he launched the BRI with fanfare and ancient proverbs. “The sea is big because it admits all rivers,” he said during launch events in Indonesia and Kazakhstan.

The sea is even bigger than Xi’s plans originally indicated. Over the past six years, the BRI has grown to incorporate a complex, global network of ocean and overland routes, with China as the focal point (see ‘Growing network’). The full scope of the BRI is impossible to judge, because China’s government has never released a list of all the projects that are in the works or planned. But estimates of its size cover a wide range from $1 trillion to $8 trillion.

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Sources: http://ceec-china-latvia.org/page/about and http://anso2018.csp.escience.cn/dct/page/70002

As one component of this massive initiative, China is creating what it calls a 21st Century Maritime Silk Road, a giant oceanic loop that links the country’s shipping to the nations bordering each of the great oceans, including some in Africa and South America. Then there’s the Silk Road Economic Belt, a complicated network of six overland corridors that connect China to some of Asia and Europe’s major cities through railways, roads and maritime paths.

The signs of a scientific BRI emerged soon after Xi visited central Asia in September 2013. The following year, CAS funded an upgrade to a 1-metre telescope at Uzbekistan’s Ulugh Beg Astronomical Institute. The improvement paved the way for the Uzbekistan institute to survey the northern sky in collaboration with China’s Xinjiang Astronomical Observatory. Uzbekistan has no experience in telescope making, observatory director Shuhrat Ehgamberdiev told the CAS Bulletin, so the most important technological part was done by China’s engineers. This was the beginning of much grander plans by CAS.

The BRI’s scientific component is being masterminded by Bai. Trained in China as an X-ray crystallographer, Bai worked with John Baldeschwieler at the California Institute of Technology in Pasadena in the mid-1980s on scanning tunnelling microscopy.

Even early in Bai’s career, it was clear he would go far, says Baldeschwieler, who remembers predicting that Bai would one day become president of CAS. During a visit to Beijing in 1995, Baldeschwieler was amazed to find that Bai had arranged a meeting with China’s then-president Jiang Zemin. “We were picked up in a small bus and taken by police escort with flashing lights through Tiananmen Square to the Great Hall of the People.” Young boys and girls were lining the stairs on a red carpet, he recalls.

Under Bai, the science BRI has been running on three parallel tracks. In China, CAS has established five centres of excellence at its institutes, and these host the 200 PhD students that the academy trains every year.

Outside China, it has opened nine research and training centres, in Africa, central Asia, South America and south and southeast Asia — often co-funded by their host countries. The China–Brazil Joint Laboratory for Space Weather in São José dos Campos, for example, is monitoring space weather changes and developing forecast models. In Bangkok, the CAS Innovation Cooperation Center helps Thailand’s universities and technology companies to work with Chinese counterparts, and at the same time gives China a foothold in the region. And then there are hundreds of individual collaborations between CAS and universities in China and elsewhere.

The third track is what CAS is calling the Digital Belt and Road, a platform for participating countries to share the data obtained as part of their collaborative projects with each other and with China. These data include satellite images as well as quantitative data on natural hazards, water resources and cultural heritage sites.

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Souvenir plates in Beijing honour Chinese leaders, including President Xi Jinping (bottom centre). Credit: Kim Kyung Hoon/Reuters

To draw these and other activities together, CAS established a super committee of scientific research organizations in 2016. This network goes by the acronym ANSO, short for Alliance of International Science Organizations in the Belt and Road Region. Its 37 members span the globe, stretching from the Russian Academy of Sciences to the University of Chile. The United Nations Educational, Scientific and Cultural Organization in Paris is also a founding member. As part of its activities, ANSO plans to support and organize research in BRI countries on sustainable development, including improving food security and reducing water scarcity.

Trouble spots
As the infrastructure projects take off and China increases its scientific activities overseas, concerns are starting to emerge over how it is carrying out its work.

Much of the criticism comes from countries not currently involved in the BRI. India’s government, for example, is angry that it has not been consulted about activities taking place in what it regards as its backyard, and more than once has warned Sri Lanka’s policymakers to scale back the extent of their scientific cooperation with China.

Another potential flashpoint is how China is building the information-technology infrastructure for the Digital Belt and Road. The United States and some other countries have warned in particular about signing agreements with Chinese telecommunications giant Huawei to build the next generation 5G mobile communications network. They say that this potentially gives the Chinese government surveillance opportunities, because Huawei is also providing BRI countries with surveillance tools — including facial recognition technology. Huawei, however, strenuously denies that it has installed access routes in its equipment for unauthorized users, such as might be used by the Chinese government.

One of the strongest concerns in BRI countries is about the environmental impacts of the projects, which are transforming the landscape in dozens of nations. The conservation group WWF reports that the main BRI connections between Asia and Europe cross through 1,739 areas that have been identified as important for biodiversity conservation, affecting 265 threatened species, including 81 endangered species such as the saiga antelope (Saiga tatarica), tigers (Panthera tigris) and giant pandas (Ailuropoda melanoleuca).

One project that has environmentalists worried is a planned 350-kilometre, $3.8-billion Hungary-to-Serbia railway. This has also attracted the attention of EU authorities and is still awaiting regulatory approval. In addition, China has not ratified the Espoo Convention, which requires member states to assess the environmental and health impacts of development projects at an early stage.

Pervez Hoodbhoy, a physicist at Forman Christian College in Lahore, Pakistan, says that few — if any — of China’s scientific collaborations are evaluating the environmental impacts of BRI infrastructure projects. “There’s a real lack of research on a regulatory framework for the BRI projects themselves and this leads to the rest of us having to make guesses as to what is happening and what the impacts might be,” he says. “There needs to be research on these questions, too,” says Hoodbhoy. “Without environmental safeguards in place, there are risks of exacerbating environmental problems, putting pressure on dwindling natural resources and displacing communities,” agrees Aban Marker Kabraji, Asia director at the International Union for Conservation of Nature (IUCN) in Bangkok.

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Bai Chunli, president of the Chinese Academy of Sciences, has been the architect of the science component of the Belt and Road Initiative. Credit: Pang Xinglei/Xinhua/Alamy

One obstacle to environmental due diligence, says Qi Ye, director of the Brookings-Tsinghua Center for Public Policy in Beijing, is that institutions in both China and BRI countries are reluctant to do anything that could slow construction. Chinese companies, he says, are often “operating in an environment where the local government or contracting party needs or wants quick results”. Strategic environmental impact assessments take time to do properly, and can result in changes to original specifications — all of which can lead to projects being delayed. “That is not a popular option,” says Qi.

Another problem is that contracts can state that environmental impact assessments are the responsibility of the host country. But because poor countries often have little monitoring or evaluation capacity for such assessments, construction projects sometimes go ahead without proper scrutiny, environmental advocates say.

There are signs that China is starting to address such concerns. China’s own conservation research organizations, such as the Dunhuang Academy, and environmental scientists including Ma Keping from CAS’s Institute of Botany in Beijing, have been warning about the environmental impacts of its vast network of transcontinental routes for some years.

Wang Xudong, the director of the Dunhuang Academy, says his colleagues have mapped 130 World Heritage sites along the original silk routes, including parts of the BRI. “In China, development is forbidden near archaeological sites, or surrounding areas.” Wang says. He adds that countries participating in the BRI should start to establish protected areas as China has done. “Foreign countries should also avoid building roads or rail near earthquake epicentres or near heritage sites,” he says.

The environmental concerns about the BRI are beginning to catch the attention of China’s top leaders, too. The IUCN, whose president is China’s former vice-minister for education Zhang Xinsheng, has been commissioned to study the environmental impacts of BRI construction in two countries: Sri Lanka and Pakistan. Research teams including Chinese government officials were in these nations conducting fieldwork in February — around the same time that Nature was visiting them. The expectation is that this study will have traction in China because it is being done at the request of the China Council for International Cooperation on Environment and Development, a body of the world’s top environment specialists that reports to China’s government.

And last week, China’s government convened a two-day forum — a first for the government — in Beijing to discussing environmental concerns surrounding the BRI. The conclusions of the meeting are expected to feed into a conference of heads of governments of BRI countries, called the Belt and Road Forum, which started on 25 April. The forum is being chaired by Xi, which means that environmental discussions have been propelled to the highest of high tables.

Arthur Hanson, chief international adviser to the China environment cooperation council, says that one ambition is to be able to persuade China’s leadership to make environmental- and social-impact assessments essential elements in BRI projects, along with ensuring that there is public participation in decisions and open access to data.

Andrew Small, a China scholar with the German Marshall Fund, a think tank in Washington DC, says that, in his experience, China’s policymakers are highly sensitive to criticisms and will be keen to work to resolve them. As the BRI takes shape, Small says, the Chinese government will look to work with more international organizations, including conservation groups and universities.

Looking east
As China increases its scientific investments in BRI countries, it is shifting how researchers around much of the planet look to the future. China has emerged as the scientific partner of choice for a large swathe of the developing world. Whereas previous generations of researchers in Africa, Asia and, to some extent, South America trained in Western countries and had their intellectual roots there, the same cannot be said for the current generation (see ‘China’s collaborations’).

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Source: Science-Metrix

Several of the older scientists who spoke to Nature for this series of articles remarked that junior colleagues — particularly those returning from China after PhD training or postdoctoral work — are now often lacking in Western scientific contacts. “As more young people go to China instead of the US, the links they will have with Western countries will further weaken,” says Kamini Mendis, a malariologist from Sri Lanka formerly with the World Health Organization in Geneva, Switzerland.

But there is another side to this story: the prospect that China’s scientific encounters with other countries could, in a small way, start to change China, too. At a meeting in Beijing last November with PhD students who had come from BRI countries around the world, Natureasked whether any wished to extend their stay. Might they consider working and living in China on a more permanent basis — just as their predecessors at home had done in Europe and North America? The room fell momentarily silent, until an academy official pointed out that the students’ contracts stipulate that they must return home once their PhDs are complete. “We do not want to cause brain drain,” she emphasized.

But she didn’t have the last word. One of the academy’s principal investigators interjected. “Are you saying that if these students stay and work here, perhaps China will become a more multicultural society?” he asked. “That would not be such a bad thing.”

How China is redrawing the map of world science | Nature
 
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Int'l research team completes peanut genome sequencing
Source: Xinhua| 2019-05-06 17:22:46|Editor: xuxin


FUZHOU, May 6 (Xinhua) -- An international research team has completed the genome sequencing of the cultivated peanut plant, providing an insight into oil crop domestication.

It was the first genome sequencing of the entire peanut plant in the world, based on which the plant's gene functional groups implicated in seed oil content and disease resistance were found.

The research was led by the Fujian Agriculture and Forestry University in eastern China's Fujian Province and jointly carried out by 78 researchers from 23 institutions in countries including China, the United States and India.

Professor Zhuang Weijian, the leading scientist of the research at the Fujian university, said that the peanut is one of the most important oil crops in the world, and China is the world's largest peanut producer.

The genome of the cultivated peanut is large, complex and difficult to be decoded, Zhuang said.

"This basic biological research deciphers the entire genome of the cultivated peanut, making it possible to carry out genome-wide selection breeding, precision molecular breeding and genome-wide editing breeding in peanuts, as well as greatly improving the genetic efficiency of peanuts," said Zhuang.

He said the R gene cluster of peanuts resistant to late leaf spot and rust diseases was obtained for the first time through the fine mapping of the genome, which will be helpful to breed new peanut varieties with high yield and good quality.

High oleic acid seeds from peanuts can help prevent human cardiovascular diseases and prolong the shelf life of peanut products. Through resequencing and other methods, scientists can breed new strains of high oleic acid, Zhuang said.

The paper on the research was published in the May issue of Nature Genetics, a top international science journal.

"This is a major breakthrough in peanut genetic research around the world. It will benefit not only China but the world as a whole," said Rajeev K. Varshney, a researcher at the International Crops Research Institute for the Semi-Arid Tropics in India and one of the authors of the paper.
 
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First performance test of a 30 mm iron-based superconductor single pancake coil under a 24 T background field
Dongliang Wang1,2,5, Zhan Zhang3,5, Xianping Zhang1,2, Donghui Jiang4, Chiheng Dong1, He Huang1,2, Wenge Chen4, Qingjin Xu3,6 and Yanwei Ma1,2,6

Published 8 March 2019 • © 2019 IOP Publishing Ltd
Superconductor Science and Technology, Volume 32, Number 4

Abstract

A 30 mm inner diameter iron-based superconductor (IBS) single pancake coil (SPC) was firstly fabricated and tested under a 24 T background field. This SPC was successfully made using the seven-filamentary Ba1−xKxFe2As2 (Ba122) tape by the wind-and-react method. This IBS coil shows the highest I c value at a magnetic field reported so far. For example, the transport critical current of this Ba122 SPC achieved 35 A at 4.2 K and 10 T, which is about half of that of a short sample. This indicates that the non-insulation winding process together with the stainless steel tape is suitable for an IBS. Even more encouraging is the fact that the I c of this SPC is still as high as 26 A under a 24 T background field, which is still about 40% of that at zero external magnetic field. These results clearly demonstrate that IBSs are very promising for high-field magnet applications.


First performance test of a 30 mm iron-based superconductor single pancake coil under a 24 T background field - IOPscience
 
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Chinese scientists develop new material to tackle oil pollution
Source: Xinhua| 2019-05-07 13:30:13|Editor: Li Xia

BEIJING, May 7 (Xinhua) -- Chinese scientists have developed new biomimetic polypropylene foams for oil-water separation, which can be used to prevent and control oil pollution.

Oil-water separation is a global challenge due to increasing industrial oil-containing waste water and frequent oil spills. Consequently, research on high-efficiency oil-water separation materials and technologies has scientific significance and application value.

Some conventional methods for tackling oil pollution such as combustion and filtration have shortcomings including high energy consumption, long duration and possible secondary pollution.

Scientists from the Ningbo Institute of Materials Technology and Engineering under the Chinese Academy of Sciences have designed new biomimetic polypropylene foams with a novel structure that can separate water and oil with high efficiency in complex environments.

The bio-inspired foam has a rough surface, and a hollow tubular structure resembling a honeycomb. It exhibited both superior absorption and filtration ability during the oil-water separation. When the oil-water mixture passes through the foam, pure water can quickly pass through it, with the foam absorbing the oil in seconds.

The foam is easy to prepare, cheap and environmentally friendly, thus offering a great potential application for large-scale oil-water separation. The team has filed patents for this technology.

The research was published in the Chemical Engineering Journal.
 
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MAY 8, 2019
Chinese researchers try brain implants to treat drug addicts
by Erika Kinetz

chineseresea.jpg
This Monday, Oct. 29, 2018 photo shows a brain scan of a methamphetamine addict with the path of electrodes that doctors at Ruijin Hospital in Shanghai, China implanted to stimulate an area of the brain associated with addiction. Western attempts to push forward with human trials of deep brain stimulation for drug addiction have foundered, even as China has emerged as a hub for this kind of research. But the vast suffering wrought by the U.S. opioid epidemic may be changing the risk-reward calculus. Now, the experimental surgery for addiction is coming to America. (AP Photo/Erika Kinetz)

Patient Number One is a thin man, with a scabby face and bouncy knees. His head, shaved in preparation for surgery, is wrapped in a clean, white cloth.

Years of drug use cost him his wife, his money and his self-respect, before landing him in this drab yellow room at a Shanghai hospital, facing the surgeon who in 72 hours will drill two small holes in his skull and feed electrodes deep into his brain.

The hope is that technology will extinguish his addiction, quite literally, with the flip of a switch.

The treatment—deep brain stimulation—has long been used for movement disorders like Parkinson's. Now, the first clinical trial of DBS for methamphetamine addiction is being conducted at Shanghai's Ruijin Hospital, along with parallel trials for opioid addicts. And this troubled man is the very first patient.

The surgery involves implanting a device that acts as a kind of pacemaker for the brain, electrically stimulating targeted areas. While Western attempts to push forward with human trials of DBS for addiction have foundered, China is emerging as a hub for this research.

Scientists in Europe have struggled to recruit patients for their DBS addiction studies, and complex ethical, social and scientific questions have made it hard to push forward with this kind of work in the United States, where the devices can cost $100,000 to implant.

China has a long, if troubled, history of brain surgery on drug addicts. Even today, China's punitive anti-drug laws can force addicts into years of compulsory treatment, including "rehabilitation" through labor. It has a large patient population, government funding and ambitious medical device companies ready to pay for DBS research.

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Dr. Li Dianyou uses a tablet computer to adjust the settings of a deep brain stimulation device implanted in the brain of a methamphetamine addict named Yan, left, on Monday, Oct. 29, 2018, at Ruijin Hospital in Shanghai, China. Western attempts to push forward with human trials of DBS for drug addiction have foundered, even as China has emerged as a hub for this kind of research. But the vast suffering wrought by the U.S. opioid epidemic may be changing the risk-reward calculus. Now, the experimental surgery Yan underwent is coming to America. (AP Photo/Erika Kinetz)

There are eight registered DBS clinical trials for drug addiction being conducted in the world, according to a U.S. National Institutes of Health database. Six are in China.

But the suffering wrought by the opioid epidemic may be changing the risk-reward calculus for doctors and regulators in the United States. Now, the experimental surgery Patient Number One is about to undergo is coming to America. In February, the U.S. Food and Drug Administration greenlighted a clinical trial in West Virginia of DBS for opioid addicts.

___

HUMAN EXPERIMENTS

Patient Number One insisted that only his surname, Yan, be published; he fears losing his job if he is identified.

He said doctors told him the surgery wasn't risky. "But I still get nervous," he said. "It's my first time to go on the operating table."

Three of Yan's friends introduced him to meth in a hotel room shortly after the birth of his son in 2011. They told him: Just do it once, you've had your kid, you won't have problems.

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A brain surgery patient walks down the main corridor of Ruijin Hospital's functional neurosurgery center in Shanghai, China on Monday, Oct. 29, 2018. Doctors at Ruijin are experimenting with brain surgery to treat a range of psychiatric conditions, including anorexia, Tourette syndrome and addiction. (AP Photo/Erika Kinetz)

Smoking made Yan feel faint and slightly unhinged. Later, he found meth brought crystalline focus to his mind, which he directed at one thing: Cards. Every time Yan smoked, he gambled. And every time he gambled, he lost—all told, around $150,000 since he started using drugs, he estimated.

His wife divorced him. He rarely saw his son.

Yan checked into a hospital for detox, moved to another town to get away from bad influences, took Chinese traditional medicine. But he relapsed every time. "My willpower is weak," he said.

Last year his father, who had a friend who had undergone DBS surgery at Ruijin, gave him an ultimatum: Back to rehab or brain surgery. "Of course, I chose surgery," Yan said. "With surgery, I definitely have the chance to get my life back."

Before there were brain implants in China there was brain lesioning. Desperate families of heroin addicts paid thousands of dollars for unproven and risky surgeries in which doctors destroyed small clumps of brain tissue. Brain lesioning quickly became a profit center at some hospitals, but it also left a trail of patients with mood disorders, lost memories and altered sex drives.

In 2004, China's Ministry of Health ordered a halt to brain lesioning for addiction at most hospitals. Nine years later, doctors at a military hospital in Xi'an reported that roughly half of the 1,167 addicts who had their brains lesioned stayed off drugs for at least five years.

DBS builds on that history. But unlike lesioning, which irreversibly kills brain cells, the devices allow brain interventions that are—in theory—reversible. The technology has opened a fresh field of human experimentation globally.

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Bloodied white mesh covers the head of a methamphetamine addict named Yan on Monday, Oct. 29, 2018, three days after he had a deep brain stimulation device implanted as part of a clinical trial at Ruijin Hospital in Shanghai, China. The hope is that DBS will extinguish his addiction, quite literally, with the flip of a switch. Critics say such human experiments are premature and risky, but U.S. regulators in February greenlighted a human trial of DBS for opioid addiction at West Virginia University. (AP Photo/Erika Kinetz)

"As doctors we always need to think about the patients," said Dr. Sun Bomin, director of Ruijin Hospital's functional neurosurgery department. "They are human beings. You cannot say, 'Oh, we do not have any help, any treatment for you guys.'"

Sun said he has served as a consultant for two Chinese companies that make deep brain stimulators—SceneRay Corp. and Beijing PINS Medical Co. He has tried to turn Ruijin into a center of DBS research, not just for addiction, but also Tourette syndrome, depression and anorexia.

In China, DBS devices can cost less than $25,000. Many patients pay cash.

"You can rest assured for the safety of this operation," Yan's surgeon, Dr. Li Dianyou, told him. "It is no problem. When it comes to effectiveness, you are not the first one, nor the last one. You can take it easy because we have done this a lot."

In fact, there are risks. There is a small chance Yan could die of a brain hemorrhage. He could emerge with changes to his personality, seizures, or an infection. And in the end, he may go right back on drugs.

____

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Doctors discuss a plan on how to implant a deep brain stimulation device in the brain of a methamphetamine addict named Yan on Friday, Oct. 26, 2018. Western attempts to push forward with human trials of DBS for drug addiction have foundered, even as China has emerged as a hub for this kind of research. But the vast suffering wrought by the U.S. opioid epidemic may be changing the risk-reward calculus. Now, the experimental surgery Yan underwent is coming to America. (AP Photo/Erika Kinetz)

A BUZZING DRILL

Some critics believe this surgery should not be allowed.

They argue that such human experiments are premature, and will not address the complex biological, social and psychological factors that drive addiction. Scientists don't fully understand how DBS works and there is still debate about where electrodes should be placed to treat addiction. There is also skepticism in the global scientific community about the general quality and ethical rigor—particularly around issues like informed consent—of clinical trials done in China.

"It would be fantastic if there were something where we could flip a switch, but it's probably fanciful at this stage," said Adrian Carter, who heads the neuroscience and society group at Monash University in Melbourne. "There's a lot of risks that go with promoting that idea."

The failure of two large-scale, U.S. clinical trials on DBS for depression around five years ago prompted soul-searching about what threshold of scientific understanding must be met in order to design effective, ethical experiments.

"We've had a reset in the field," said Dr. Nader Pouratian, a neurosurgeon at UCLA who is investigating the use of DBS for chronic pain. He said it's "a perfectly appropriate time" to research DBS for drug addiction, but only "if we can move forward in ethical, well-informed, well-designed studies."

In China, meanwhile, scientists are charging ahead.

At 9 a.m. on a grey October Friday in Shanghai, Dr. Li drilled through Yan's skull and threaded two electrodes down to his nucleus accumbens, a small structure near the base of the forebrain that has been implicated in addiction.

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People walk past an entrance to Ruijin Hospital on Thursday, Oct. 25, 2018, in Shanghai, China. Doctors at Ruijin have tried to turn the hospital into a center of deep brain stimulation research. The hope is that the technology will heal a host of conditions, including addiction, with the flip of a switch. Western attempts to push forward with human trials of DBS for addiction have foundered, even as China emerged as a hub for this kind of research. (AP Photo/Erika Kinetz)

Yan was awake during the surgery. The buzzing of the drill made him tremble.

At 4 p.m. the same day, Yan went under general anesthesia for a second surgery to implant a battery pack in his chest to power the electrodes in his skull.

Three hours later, Yan still hadn't woken from the anesthesia. His father began weeping. His doctors wondered if drug abuse had somehow altered his sensitivity to anesthesia.

Finally, after 10 hours, Yan opened his eyes.

___

BODY COUNT

According to the U.S. Centers for Disease Control and Prevention, more than 500,000 Americans died of drug overdoses in the decade ending in 2017—increasingly, from synthetic opioids that come mainly from China, U.S. officials say. That's more than the number of U.S. soldiers who died in World War II and Vietnam combined.

6-chineseresea.jpg

A nurse walks through the functional neurosurgery center at Shanghai's Ruijin Hospital on Monday, Oct. 29, 2018. Doctors at Ruijin are experimenting with brain surgery to treat a range of psychiatric conditions, including anorexia, Tourette syndrome and addiction. Six of the eight human trials of deep brain stimulation for addiction underway globally are being done in China, according to a U.S. government database. (AP Photo/Erika Kinetz)

The body count has added urgency to efforts to find new, more effective treatments for addiction. While doctors in the U.S. are interested in using DBS for addiction, work funded by the U.S. National Institutes of Health is still focused on experiments in animals, not people.

At least two U.S. laboratories dropped clinical trials of DBS for treating alcoholism over concerns about study design and preliminary results that didn't seem to justify the risks, investigators who led the studies told The Associated Press.

"The lack of scientific clarity, the important but strict regulatory regime, along with the high cost and risk of surgery make clinical trials of DBS for addiction in the U.S. difficult at the present time," said Dr. Emad Eskandar, the chairman of neurological surgery at Albert Einstein College of Medicine in New York.

China's studies have offered mixed results. Sun and his colleagues have published one case study, describing a heroin addict who fatally overdosed three months after getting DBS. But a separate pilot study published in January by doctors at a military hospital in Xi'an showed that five of eight heroin addicts stayed off drugs for two years after DBS surgery.

Based on those results, SceneRay is seeking Chinese regulatory approval of its DBS device for addiction, and funding a multi-site clinical trial targeting 60 heroin addicts. SceneRay chairman Ning Yihua said his application for a clinical trial in the U.S. was blocked by the U.S. Food and Drug Administration.

But in February, the FDA greenlighted a separate, pilot trial of DBS for four opioid addicts, said Dr. Ali Rezai, who is leading the study at the West Virginia University Rockefeller Neuroscience Institute. They hope to launch the trial in June, with funding from the National Institute on Drug Abuse.

The FDA declined comment.

7-chineseresea.jpg

Orderlies roll a brain surgery patient out of the functional neurosurgery center at Ruijin Hospital in Shanghai, China on Monday, Oct. 29, 2018. Doctors at Ruijin are experimenting with deep brain stimulation as a treatment for addiction. The hope is that the technology will extinguish addiction, quite literally, with the flip of a switch. Critics say such experiments are premature and risky, but U.S. regulators in February greenlighted a human trial of DBS for opioid addiction at West Virginia University. (AP Photo/Erika Kinetz)

"People are dying," Rezai said. "Their lives are devastated. It's a brain issue. We need to explore all options."

___

'YOU CAME TOO LATE'

Two unsteady days after Yan's surgery, doctors switched on his DBS device. As the electrodes activated, he felt a surge of excitement. The current running through his body kept him awake; he said he spent the whole night thinking about drugs.

The next day, he sat across from Dr. Li, who used a tablet computer to remotely adjust the machine thrumming inside Yan's head.

"Cheerful?" Li asked as the touched the controls on the tablet.

"Yes," Yan answered.

8-chineseresea.jpg

A stereotactic device presses into the head of a brain surgery patient at Ruijin Hospital's functional neurosurgery center in Shanghai, China on Monday, Oct. 29, 2018. Doctors at Ruijin are experimenting with deep brain stimulation as a treatment for addiction. The hope is that the technology will extinguish addiction, quite literally, with the flip of a switch. Critics say such experiments are premature and risky, but U.S. regulators in February greenlighted a human trial of DBS for opioid addiction at West Virginia University. (AP Photo/Erika Kinetz)

Li changed the settings. "Now?"

"Agitated," Yan said. He felt heat in his chest, then a beating sensation, numbness and fatigue. Yan began to sweat.

Li made a few more modifications. "Any feelings now?"

"Pretty happy now," Yan said.

He was in high spirits. "This machine is pretty magical. He adjusts it to make you happy and you're happy, to make you nervous and you're nervous," Yan said. "It controls your happiness, anger, grief and joy."

Yan left the hospital the next morning.

More than six months later, he said he's still off drugs. With sobriety, his skin cleared and he put on 20 pounds. When his friends got back in touch, he refused their drugs. He tried to rekindle his relationship with his ex-wife, but she was pregnant with her new husband's child.

9-chineseresea.jpg

A man leaves the Center for Functional Neurosurgery at Ruijin Hospital in Shanghai, China on Monday, Oct. 29, 2018. Doctors at Ruijin have tried to turn the hospital into a center of deep brain stimulation research. (AP Photo/Erika Kinetz)

"The only shame is that you came too late," she told him.

Sometimes, in his new life, he touches the hard cable in his neck that leads from the battery pack to the electrodes in his brain. And he wonders: What is the machine is doing inside his head?

Explore further

© 2019 The Associated Press. All rights reserved.


Chinese researchers try brain implants to treat drug addicts | MedicalXpress
 
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China's big radiation facility project eyes big growth
Source: Xinhua| 2019-05-08 10:50:02|Editor: Li Xia

BEIJING, May 8 (Xinhua) -- The Shanghai Synchrotron Radiation Facility will see its research capability more than double within the next three years, the China Daily reported Wednesday.

There will be 40 beam lines and 60 laboratories in operation at the facility by 2022, up from the current 15 beam lines and 19 laboratories, the newspaper quoted Zhao Zhentang, the facility's director, as saying.

The facility operates 7,000 hours a year. It is involved in frontier scientific research in various fields, including life sciences, new materials, physics, chemistry, environmental sciences and archaeology, Zhao said on its 10-year anniversary.

While there were only 300 users when the facility opened in 2009, the number has surged to more than 24,600, including 100 overseas users mainly from the Republic of Korea, Japan, Australia and Canada, the newspaper said.
 
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wing%20dino_16x9.jpg
An artist’s illustration of Ambopteryx
MIN WANG/INSTITUTE OF VERTEBRATE PALEONTOLOGY AND PALEOANTHROPOLOGY/CHINESE ACADEMY OF SCIENCES

New batlike dinosaur was early experiment in flight
By John Pickrell
May. 8, 2019 , 1:00 PM

A number of tiny, bat-winged dinosaurs flew the Jurassic skies, according to the strongest evidence yet for such creatures—a well-preserved fossil of a starling-size fluffball that may have looked a little like a flying squirrel. The find, recovered near a farming village in northeastern China, suggests dinosaurs were experimenting with several methods of flight during this period, but many were an evolutionary dead end.

“This fossil seals the deal—there really were bat-winged dinosaurs,” says Stephen Brusatte, a paleontologist at the University of Edinburgh who was not involved with the study.

Scientists were already confident that a number of dinosaurs could fly. There are birds, of course, which are technically dinosaurs and appeared during the Jurassic period, at least 150 million years ago. Other dinosaurs sported feathers on their hind- and forelimbs, effectively giving them four birdlike wings.

Then, in 2015, researchers discovered a dinosaur that may have flown more like a bat. Named Yi qi (Mandarin for “strange wing”) and discovered in northwestern China, the crow-size creature appeared to have a flap of skin stretched between its body and arm bones that was supported by a rod of cartilage. But the fossil, which belongs to an enigmatic group of dinosaurs called the scansoriopterygids, was partial and poorly preserved, so scientists couldn’t be sure it actually flew like a bat. “There’s been debate about whether the skin flap was really an airfoil or used for another purpose,” Brusatte says.

The new fossil, named Ambopteryx longibrachium (meaning “both-wing” and “long arm,” referring to this second method of dinosaur flight) and dated to about 163 million years ago during the Jurassic period, doesn’t have that problem. Nearly every part of the little dino—which was uncovered by a farmer who provides the fossils he finds to the Chinese Academy of Sciences’s Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) in Beijing—is well-preserved, including membranous batlike wings similar to those of Yi qi. “You could have fit it in your hand,” says IVPP paleontologist and study author Jingmai O’Connor. “It would have been this tiny, bizarre-looking, buck-toothed thing like nothing alive today.”

fossil_internal.jpg
The new Ambopteryx fossil, with two folded wings in the center and the remains of fuzzy feathers along the neck
MIN WANG/INSTITUTE OF VERTEBRATE PALEONTOLOGY AND PALEOANTHROPOLOGY/CHINESE ACADEMY OF SCIENCES


Even Ambopteryx’s stomach contents were preserved. Researchers recovered pieces of bone and small rocks called gastroliths, which modern birds use to grind plant material, indicating the species may have been omnivorous. Though the creature was replete with feathers, these were a downy fuzz and not used for flight. O’Connor also speculates that males of the species may have sported long ornamental tail feathers, possibly to woo females, as can be seen in other scansoriopterygid fossils.

The complete skeleton has allowed scientists to make the first detailed analysis of differences in wing design and mode of flight between these dinosaurs and birds. Researchers measured the bones of the arms and fingers in each type of wing and compared them using statistical methods.

Ambopteryx’s wings were formed by elongating the humerus and ulna, the bones of the upper and lower arm in humans, the team reports today in Nature. Birds instead achieved flight by elongating their metacarpals, analogous to our fingers. “The main lift-generating surface of birds’ wings is formed by feathers,” O’Connor explains. “In bats, pterosaurs [dinosaur-era reptiles that flew similar to bats], and now scansoriopterygids—you instead have flaps of skin that are stretched out in between skeletal elements.”

“This new discovery shows Yi qi was not an aberrant species, but that there was an entire group of bat dinosaurs taking to the skies in the [Jurassic],” says Darla Zelenitsky, a paleontologist at the University of Calgary in Canada who has studied feathered dinosaurs.

However, although nearly 10,000 species of birds live today, no scansoriopterygids survived past the end of the Jurassic. That suggests their early experiment in flight was far less successful, O’Connor says. Still, she says, their existence is remarkable, given that flight has only evolved in a handful of groups of animals across the entire history of life. “The idea that flight evolved more than once in dinosaurs is incredibly exciting and hasn’t quite sunk into the scientific community yet.”

“The evolution of flight wasn’t a gradual march from dinosaur to bird,” Brusatte adds. “It involved lots of experimentation and tinkering.”



New batlike dinosaur was early experiment in flight | Science | AAAS

Min Wang, Jingmai K. O’Connor, Xing Xu & Zhonghe Zhou. A new Jurassic scansoriopterygid and the loss of membranous wings in theropod dinosaurs. Nature (2019). DOI: 10.1038/s41586-019-1137-z

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Plants and the art of microbial maintenance
9th May 2019

Arabidopsis-roots-edit-Credit-Phil-Robinson-615x340.jpg

It’s been known for centuries that plants produce a diverse array of medically-valuable chemicals in their roots.

The benefits for human health are clear, but it’s been less apparent how and why plants expend 20 percent of their energy building these exotic chemicals. Is it for defence? Is it waste? What is it for?

A joint study from the John Innes Centre and the Chinese Academy of Sciences has shed new light on this fundamental question of plant specialised metabolism.

Appearing in the journal Science, the study reveals that plants use their root-derived chemicals to muster and maintain communities of microbes. It suggests that across the plant kingdom diverse plant chemistry may provide a basis for communication that enables the sculpting of microbial communities tailored to the specific needs of the host plant, be that a common weed or major crops such as rice or wheat.

The findings provide researchers with a gateway to engineering plant root microbiota in a range of major crops.

“This question has fascinated people for hundreds of years and we’ve found this chemistry enables plants to direct the assembly and maintenance of microbial communities in and around the roots,” says Professor Anne Osbourn of the John Innes Centre, a co-author of the study.

“We assume that the plant is shaping the root microbiota for its own benefit. If we can understand what the plant is doing and what kind of microbes are responding to it and what the benefits are then we may be able to use that knowledge to design improved crops or to engineer the root microbiome for enhanced productivity and sustainability and to move away from fertilizers and pesticides,” adds Professor Osbourn.

In this study the team uncovered a metabolic network expressed in the roots of the well-known model plant Arabidopsis thaliana. This network, organised primarily around gene clusters, can make over 50 previously undescribed molecules belonging to a diverse family of plant natural products called Triterpenes.

The researchers generated plants altered in the production of these root-derived chemicals and working with Professor Yang Bai of the Chinese Academy of Sciences grew these plants in natural soil from a farm in Beijing.

The results showed clear differences in the types of microbial communities that these plants assembled compared with the wild plants.

In further experiments the group synthesized many of these newly-discovered chemicals and tested their effect on communities of cultured microbes in a laboratory re-enactment of plant-microbial interactions in the soil.

“Using this approach, we can see that very small differences in chemical structures can have profound effects on whether a particular molecule will inhibit or promote the growth of a particular bacteria. Taken together we can clearly see that very subtle, selective modulation of microbes by this cocktail of chemicals,” says first author of the paper Dr Ancheng Huang.

Comparisons with root bacterial profiles in rice and wheat that do not make these Arabidopsis triterpenes demonstrated that these genetic networks were modulating bacteria towards the assembly of an Arabidopsis-specific root microbiota.

The next steps for the researchers is to explore further the benefits of this sculpting of the microbial community for the plant and observe other influences on plant chemistry such as nutrient limitation and pathogen challenge.

The full study: A specialized metabolic network selectively modulates Arabidopsis root microbiota, appears in Science.


Plants and the art of microbial maintenance | John Innes Centre

Ancheng C. Huang, Ting Jiang, Yong-Xin Liu, Yue-Chen Bai, James Reed, Baoyuan Qu, Alain Goossens, Hans-Wilhelm Nützmann, Yang Bai, Anne Osbourn. A specialized metabolic network selectively modulates Arabidopsis root microbiota. Science (2019). DOI: 10.1126/science.aau6389
 
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Quake warning system to be in place by 2023
By Hou Liqiang | China Daily | Updated: 2018-10-13 07:43

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Primary school students crouch under desks during an earthquake drill on Friday in Handan, Hebei province. [Photo by Hao Qunying/For China Daily]

China will build a nationwide earthquake early warning system by 2023, said a senior emergency management official.

It has already finished testing an earthquake alert system for high-speed trains, and the system is expected to be extended to the country's entire high-speed rail network, said Zheng Guoguang, vice-minister of emergency management. He made the remarks ahead of the International Day for Disaster Reduction, which falls on Saturday this year.

The early warning system, known as the National Seismic Intensity Rapid Reporting and Early Warning project, was approved by central authorities early last year. It will include more than 15,000 observation stations across the country, at a cost of almost 1.9 billion yuan ($274 million), and 3,360 service terminals in national and provincial government bodies that are related to earthquake relief, as well as in public institutions and vital infrastructure and utilities, such as nuclear power plants.

Observation stations will be set in different areas according to earthquake frequency and the potential risk of and effects from disasters. The North-South Seismic Belt, which encircles most of Sichuan, Gansu and Yunnan provinces, will be one of the key areas for such stations, said Zheng, who also is head of the China Earthquake Administration.

Seismic sensors could detect the first energy that emerges from a quake before the jolt begins. This makes it possible to warn those in affected areas before they feel the impact. The farther people are from the epicenter, the longer they would have to respond in the event of a quake.

Even before the system won approval, the administration teamed up in 2012 with the Ministry of Railways, which has since been reshuffled into China Railway Corp, to establish a team to research an earthquake alert system for high-speed railway.

The system developed by the team has been tested on several railway lines in Fujian and Shanxi provinces and works very well, Zheng said, adding that his administration will continue to cooperate with China Railway to extend the system to all high-speed trains in the country.

The completion of the field test of the alert system on the Datong-Xi'an high-speed railway in August marks the quake alert system's shift from the research and development stage to actual use, the administration said.

Zheng said the system will probably be put into operation first in Southwest China, considering the high frequency of earthquakes there. For example, the Sichuan-Tibet railway, which is under construction, crosses four earthquake faults where 14 earthquakes above magnitude 7.0 have occurred.

Although China's quake alert system for high-speed trains uses advanced technology, the nationwide early warning system is needed for it to work best, Zheng said. Therefore, the country should accelerate construction of the National Seismic Intensity Rapid Reporting and Early Warning project, he said.

Zheng said one challenge that China faces in earthquake alerts is the particular nature of earthquakes in the country. Most earthquake epicenters around the world occur along tectonic plate boundaries, many of which are located in the ocean. In China, however, most tremor epicenters occur within the plate on which the country sits, he said. Such countries as Japan and Mexico usually have more time to alert people to a quake, since it takes time for a quake originating in the ocean to affect land, Zheng added.

In addition to earthquake early warning, China also has been trying to forecast quakes, which is much more difficult, Zheng said.

"The Chinese government is the only one in the world that considers earthquake forecast research as its duty," he said.

China is among the countries that suffer the most from earthquakes. From 1900 to 2017, China was hit by an annual average of 18 earthquakes above magnitude 5.0. So far this year, the number stands at 10.
China's Sichuan to offer quake early warning services by year-end
Source: Xinhua| 2019-05-10 22:40:31|Editor: yan

CHENGDU, May 10 (Xinhua) -- Sichuan, a quake-prone province in southwest China, will provide its residents earthquake early warning services by the end of this year, according to the Sichuan Earthquake Administration.

The early warning services include alerting residents seconds before seismic waves arrive through multiple broadcasting systems, using the theory that radio waves travel faster than seismic waves.

Earthquake research has found that being aware of an earthquake three seconds beforehand can save 14 percent of casualties, 10 seconds can save 39 percent of casualties, and 20 seconds can save 63 percent of casualties.

The services will also offer residents brief information about the quake one to two minutes after a quake strikes, its magnitude two to five minutes later, and an assessment of the disaster within two hours.

China's capacity in earthquake monitoring and disaster relief has improved since 2008, when the Wenchuan Earthquake in Sichuan killed more than 69,000 people and left nearly 18,000 missing, said a report submitted to the country's top legislature last year.

A new generation of earthquake monitoring and warning systems have been installed along more than 20 high-speed railway lines spanning 6,642 km, said the report.

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China seismic experimental site launches 360 observation stations
Source: Xinhua| 2019-05-10 23:21:04|Editor: yan

BEIJING, May 10 (Xinhua) -- A total of 360 observation stations have been established in the China Seismic Experimental Site (CSES) so far, Zheng Guoguang, head of the China Earthquake Administration, said Friday.

China announced on May 12, 2018 to build the CSES, a natural laboratory in earthquake science and technology, in Sichuan and Yunnan regions.

It aims to facilitate investigator-driven research on continental strong earthquake preparation and occurrence, and enhance the disaster resilience of the society, according to Zheng.

So far, a total of 360 observation stations have been established in the experimental site. Thirteen countries including the United States and Russia have participated in the research.

China will step up the pace of experimental site construction to obtain more underground observation data, and promote data sharing for further research, Zheng said.
 
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