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| 1 | Monitoring of atmospheric radionuclides from the Fukushima nuclear accident and assessing their impact on Xi'an, China显示文摘Aerosol radionuclides (131I, 134Cs, 137Cs) and gaseous radioactive xenon (133Xe) were monitored at Xi'an, China following the accident at the Fukushima nuclear power plant in March 2011. The additional annual effective dose attributable to the Fukushima emissions was much lower than the public annual effective dose from natural radiation, according to Chinese national standards. The monitoring results were compared with data from other countries as well as with the radionuclide concentrations observed in Xi'an after the Chernobyl nuclear accident in 1986. Possible transport pathways of the released radionuclides from Fukushima to Xi'an were investigated. The occurrence of an anticyclone in the Pacific Ocean region and the extended period over which the radionuclides were released made the determination transport pathways complex, but divergence in the plume and easterly flow evidently brought the initial suite of radionuclides to Xi'an. | LIU LongBo WU Shan CAO JunJi XIE Feng SHI QuanLin ZHANG ChangYun TANG HanBing HE XiaoBin ZHANG Rong CHEN LiYun WEI GuanYi ZHANG ZhiHong ZHANG JiaMei DANG HaiJun | 2013 | Chinese Science Bulletin2013，58，13： | 4 |
| 2 | Enhanced endosomal escape of dendrigraft poly-L-lysine polymers for the efficient gene therapy of breast cancer显示文摘Dendrimer,such as dendrigraft poly-L-lysine(DGL)polymers,with high surface charge density,well-defined structure,and narrow poly-dispersity is often employed as a gene vector,but its transfection efficiency is still partially inhibited due to poor endosomal escape ability.Herein,we used a surface modification strategy to enhance the endosomal escape ability of DGL polymers,and thus improved its gene transfection efficiency.A library of phenylboronic acid(PBA)modified DGL polymers(PBA-DGLs)was designed to screen efficient small interfering RNA(siRNA)vectors.The lead candidate screened from the library shown a capability of inducing nearly 90% gene silencing in MDA-MB-231 cells.The study of the transfection mechanism revealed that PBA modification not only improves siRNA cellular uptake,but,more importantly,endows DGL polymers the ability of endosomal escape.One of the top candidates from polyplexes was further shielded with hyaluronic acid to construct targeted nanoparticles,and the yielding nanoparticles significantly suppressed the tumor growth in a breast cancer model by effective siRNA delivery.This research provides a general and effective strategy to enhance the endosomal escape and transfection efficiency of dendrimer. | Li Ye Hongmei Liu Xin Fei Ding Ma Xiaozhen He Qianyun Tang Xue Zhao Hanbing Zou Xiaojing Chen Xianming Kong Peifeng Liu | 2022 | Nano Research2022，15，2： | 1 |
| 3 | Study on Sampling Technique of Atmospheric Radionuclide显示文摘Atmospheric radionuclide monitoring usually includes two sampling techniques,namely ultra-high volume aerosol samplers to collect atmospheric particles by using filter media,and radioactive noble gas samplers to collect atmospheric noble gas based on adsorption method. Atmospheric sampling techniques have been researched in Northwest Institute of Nuclear Technology since the Comprehensive Nuclear-Test-Ban Treaty( CTBT) was signed in 1996. Several ultra-high volume aerosol samplers and some types of radioactive xenon isotopes samplers had been developed. For the aerosol sampler,the sampling flow is between 450 and 800 m3/h,with the minimum detectable concentration( MDC) of131 I less than5 μBq /m3. For the xenon sampler,the sampling capacity of xenon is more than 4 ml per day,with MDC of133 Xe less than 0. 25 mBq /m3. After the nuclear accident of Fukushima in 2011,monitoring of the atmospheric radionuclide was carried out for 3 months at Xi'an,and part of radionuclide was detected with concentrations higher than their backgrounds in the period,including131 I,134Cs,137 Cs and133Xe. | Wu Shan Liu Longbo Zhang Changyun Tang Hanbing Chen Liyun Wu Yanmin Xie Feng Li Zhiming Shi Quanlin Dang Haijun | 2014 | Meteorological and Environmental Research2014，5，6： | 1 |
| 4 | Removal characteristics of Zn(II) from aqueous solution by alkaline Ca-bentonite显示文摘 | Hanbing Zhang Zhangfa Tong Tengyou Wei Yankui Tang | 2011 | Desalination2011，，1： | 1 |
| 5 | Leakage of nuclear material powder from pressure container through a small orifice显示文摘Because of the radioactivity and toxic nature of nuclear materials,their containment within oxide matrices,encased in sealed containers,has been proposed as a suitable means for storage and transportation.However,container failures because of cracks or small orifices present a major leakage risk for nuclear materials,consequently posing a significant hazard to the environment and human beings.In this study,terbium oxide powder was used as a nuclear material representative to examine the leakage of nuclear material powder through orifices located at the base of a pressure container.The dependence of the orifice diameter,the powder layer thickness,and the internal pressure of the container on the leakage mechanism and amount was examined.A simplified model correlating the dependence of the above-mentioned parameters to determine the utmost leakage amount was also developed based on the present results.The leakage of the nuclear material powder was assessed by measuring its concentration using an optical particle counter.The diameter of the orifice determined the powder leakage mechanism,which in turn influenced the amount of leakage produced.Comparison studies showed that unlike the changes in the differential pressure,the volume of the container has little effect on the leakage amount.Under sufficiently high internal pressures,the oxide powder can be released as a fine aerosol.The work is not only crucial from the nuclear safety aspect,but is also beneficial for the safe application of powder and nanoparticles. | Longbo Liu Yanmin Wu Yongyang Su Hanbing Tang Zhihong Zhang Ping Huang Lili Zhang Lixing Zhang | 2014 | Particuology2014，12，3： | 0 |
| 6 | Radiative Recombination Rates Enhancement at Low Energy Range in the Heavy Ion Storage Ring CSRm显示文摘Recombination of Ar^(14+),Ar^(15+),Ca^(16+) and Ni^(19+) ions with electrons has been investigated at low energy range at the CSRm.For each ion,the absolute recombination rate coefficients have been measured with electron-ion collision energies from 0 to 1000 meV which include the radiative recombination(RR)and also dielectronic recombination(DR)processes.In order to interpret the measured results. | Khan Nadir Huang Zhongkui Wen Weiqiang Wang Shuxing Wang Hanbing Ma Wanlu Zhu Xiaolong Zhao Dongmei Zhu Linfan Mao Lijun Li Jie Ma Xiaoming Tang Meitang Yin Dayu Yang Weiqing Yang Jiancheng Yuan Youjin Ma Xinwen | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 7 | Challenges and Responses of Left-Behind Elderly and Children in Rural China Amid the New Population Development Stage显示文摘The disparate economic growth in China has compelled numerous adults from rural areas to migrate to cities in search of more lucrative employment prospects(1).In the 7th National Census,it was reported that the floating population totaled 375,816,759,accounting for approximately 26.00%of the overall population.Such migratory patterns often result in leaving behind vulnerable groups,particularly children and older adults,in rural regions.Given the inadequately established care systems,these groups are particularly susceptible and have consistently been at the forefront of social security concerns in China(2). | Dianqi Yuan Peisen Yang Hanbing Yang Huameng Tang Chao Guo | 2023 | China CDC weekly2023，5，27： | 0 |
| 8 | 用于高度可拉伸生物器件的可打印金属——聚合物导体显示文摘文章简介液态金属如镓的合金在常温下不仅自身具有流动性,电流也能在其中流动,因而成为可拉伸器件和电路的理想材料。但是液态金属具有巨大的表面能(难以铺展),且其表面会自发形成绝缘氧化膜,这就使得液态金属在各种基底上的印刷成为一个难题。 | Lixue Tang Shiyu Cheng Luyao Zhang Hanbing Mi Lei Mou Shuaijian Yang Zhiwei Huang Xinghua Shi 蒋兴宇 | 2019 | 科学新闻2019，0，2： | 0 |
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