Convert fluorescent biomarkers material on FJIRSM rare earth made ​​new progress in research

Compared with the traditional fluorescent marker molecule material ( such as a fluorescent dye ) , rare earth nano- conversion luminescent materials are not only high chemical stability, long fluorescence lifetimes , low potential toxicity, and because the excitation of near -infrared light having a larger optical penetration depth, no biological tissue autofluorescence of biological tissue and almost no damage and other significant advantages in biological fluorescence detection and imaging has important applications. Currently upconversion fluorescence labeling of nano materials development bottleneck problem is its low quantum yield . Conversion on improving luminous efficiency, explore new and efficient upconversion fluorescence labeling of nano materials has been the target of the focus of attention and effort , but also the availability of key materials such practical applications.

In the National Natural Science Fund for Distinguished Young and promote scientific and technological cooperation to support cross-strait joint fund , the Ministry of Science , " 863" , and major scientific instrument development projects , such as the Chinese Academy of strategic science and technology projects under the pilot , Fujian Institute of Research on the Structure of Chinese Academy of Sciences photoelectric materials Chemistry and Physics Laboratory research team and Chen yuan , State Key Laboratory of Structural Chemistry Huangming Dong research team , for the first time by thermal decomposition method , by injecting high-temperature coating precursor synthesized excellent luminescent properties of LiLuF4: Ln3 + core-shell structure on conversion nanocrystals . Multi-layer core-shell coating significantly improves the upconversion nanocrystals efficiency , which Er3 + and Tm3 + absolute quantum yield reached 5.0% and 7.6 % have been reported for the highest value of rare earth conversion monodisperse nanocrystals doped . Specifically , after the surface-modified nanocrystalline conversion as a fluorescent probe for high sensitivity detection of disease -specific markers . For example , the conversion of phase detection of β subunit of human chorionic gonadotropin (β-hCG, an important tumor marker ) detection limit of 3.8 ng / mL, with normal serum β-hCG in comparable level . In addition, the team through proof of concept experiments indicate LiLuF4 is a multifunctional nanoprobes biomarkers can be used for multi-modal biological imaging such as computed tomography (CT) imaging and targeted tumor cells convert fluorescent imaging . Recent research results related to the frontispiece (Frontispiece) published in the form of "German Applied Chemistry " magazine (Angew. Chem. Int. Ed. 2014, 53, 1252-1257), and was elected a hot papers.

Previously, Chen Yuan research team made ​​object detection of tumor markers in rare earth -based nano fluorescent probes related research progress (Coord. Chem Rev, 2014, DOI: 10.1016/j.ccr.2013.11.017; Chem Soc Rev.... in 2013 , 42, 6924 ) . For example the use of ultra-small CaF2: Ce3 + / Tb3 + nano fluorescent probes to achieve a human soluble urokinase receptor tumor markers (suPAR) time-resolved fluorescence resonance energy transfer (TR-FRET) detection (Angew. Chem Int Ed.. in 2013 , 52, 6671 ) .


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To strengthen the management of China's rare earth industry and the formation of large enterprise groups

Deputy Minister of Industry and Information Technology Ministry recently said Su Bo , China's rare earth industry for more than two years, according to the law of survival of the fittest market mergers and acquisitions , has been basically formed six companies led industry development pattern. Next , China will further strengthen the management of the rare earth industry , focusing on this six companies were led to further promote mergers and acquisitions , formation of large rare earth enterprise groups.

Su Bo said rare earth management will fully play a decisive role in the allocation of resources in the market , business-oriented , diversified investment, market -oriented operation ; played the role of good government , a combination of economic , technical, legal and necessary administrative means to eliminate institutional mechanisms obstacles , make the best use to promote mergers and acquisitions, corporate formation of both internal incentive , another external regulatory policy system of accountability to promote mergers and acquisitions changed from "Let me rephrase " to " I want to reorganization ."

Su Bo said that the rare earth industry mergers and acquisitions work must be clear responsibility of the government , enterprises and departments. Local governments should establish coordination mechanisms play a decisive role of the market in resource allocation , and mergers and acquisitions in the region of unified planning work ; remove institutional hurdles , and resolutely combat illegal rare earth mining, production and circulation behavior ; coordinating off, converting, personnel placement , maintenance of major issues of social stability , and support for the central enterprises and other groups to carry out cross-regional mergers and acquisitions work . Led enterprises to earnestly implement the integration , commitment to corporate consolidation, employee relocation , debt disposal , financial compensation and other liability ; clear equity relationships , improve corporate governance structure ; strict implementation of the management system of the country , together with other groups to maintain market order and the industry as a whole interests.


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Changting:Third Chinese Rare Earth Industry Haixi Held Technical Achievements Matchmaking

Changting:Third Chinese rare earth industry Haixi held technical achievements matchmaking.




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Japan is still dependent on Chinese rare earth supply

Foreign media said the Chinese air defense identification zone designation of the East China Sea , Japanese Prime Minister Shinzo Abe visited the Yasukuni Shrine end of 2013 , China was seen as synonymous with the risk of " rare earth" but did not become a topic. Is the crisis really disappear?

According to " Japanese Economic News " reported that by mid-September 2010, the Diaoyu Islands waters collision , China played the diplomatic card, cut off exports to Japan of rare earths. Since nearly 90 % of the demand dependent on Chinese rare earth supply shortages in Japan immediately , industry into great confusion . Rare earth supply shortage until the summer of 2011 , prices have soared several times.

In the interests of drivers , the United States , Canada, Australia and other countries to develop rare earth set off a craze . Japanese companies are also accelerating the diversification of procurement channels . Sojitz company began in the fall of 2013, imports of rare earths from Australia. Toyota Tsusho Corporation also plans 2014 production of rare earth in India.

Reported that through their own efforts to overcome the crisis in Japan seems to behave more and more powerful. However , Extraordinary Professor Institute of Industrial Science , University of Tokyo Toru Okabe said: " When Japanese companies grabbed the soft underbelly of China sourcing rare condition is still not changed. "

Reported that the misunderstanding lies in the "rare earth " is a general term . Although called "rare earth " Overall, it subdivided it can be divided into light rare earths and heavy rare earths , the former can be extensively mined in the world to which the stock rarely , is a veritable " rare earths " , two add up to a total of 17 kinds of persons . After the collision , the Japanese instead of Chinese from all over the world to find procurement channels mainly light rare-earth . Heavy rare earth rare earth remains the same is known almost entirely dependent on China .

Reported that representatives of heavy rare-earth is " dysprosium ." High-performance magnets mounted on hybrid and electric vehicles , in order to high temperature, it can not be separated , " Di ." By upgrading technology , although you can reduce the amount of vehicle , but with the popularity of electric cars , the total will be difficult to reduce .

Heavy rare earths outside of China in opening up the market , the company plans to Sumitomo imported from Kazakhstan , but has not had the goods. If Chinese exports interrupted for some reason , then, Japan does not ensure a steady supply .

Reported that the light rare-earth there are certain risks. Glass grinding need to use " cerium " because China banned exports after the collision , " cerium " Japan has popularized the alternative polishing method , the usage is also significantly reduced. However, the lighter rare earth mining out of the mixture, about half of the " cerium ." If miners produced according to the most " cerium " sales while reducing production plan, then a mine produced from the same raw materials , high-performance magnet " neodymium " liquidity optical lens materials " La " will be reduced .

Government source said: " As the saying goes , a good pain is forgotten . Dependent on China 's sense of crisis has been weak. Abe would like to take the opportunity to visit the Yasukuni Shrine again sounded the alarm . "

Reported that the industry strongly hope to achieve a balance between supply and demand of rare earth , Sino-Japanese relations as soon as possible to stabilize.


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Rare Earth Counterterrorism Operations Egg Pain Battle

Rare earth counterterrorism operations egg pain battle.




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