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| 1 | Humoral immune response to circulating SARS-CoV-2 variants elicited by inactivated and RBD-subunit vaccines显示文摘SARS-CoV-2 variants could induce immune escape by mutations on the receptor-binding domain(RBD)and N-terminal domain(NTD).Here we report the humoral immune response to circulating SARS-CoV-2 variants,such as 501Y.V2(B.1.351),of the plasma and neutralizing antibodies(NAbs)elicited by CoronaVac(inactivated vaccine),ZF2001(RBD-subunit vaccine)and natural infection.Among 86 potent NAbs identified by high-throughput single-cell VDJ sequencing of peripheral blood mononuclear cells from vaccinees and convalescents,near half anti-RBD NAbs showed major neutralization reductions against the K417N/E484K/N501Y mutation combination,with E484K being the dominant cause.VH3-53/VH3-66 recurrent antibodies respond differently to RBD variants,and K417N compromises the majority of neutralizing activity through reduced polar contacts with complementarity determining regions.In contrast,the 242–244 deletion(242–244Δ)would abolish most neutralization activity of anti-NTD NAbs by interrupting the conformation of NTD antigenic supersite,indicating a much less diversity of anti-NTD NAbs than anti-RBD NAbs.Plasma of convalescents and CoronaVac vaccinees displayed comparable neutralization reductions against pseudo-and authentic 501Y.V2 variants,mainly caused by E484K/N501Y and 242–244Δ,with the effects being additive.Importantly,RBD-subunit vaccinees exhibit markedly higher tolerance to 501Y.V2 than convalescents,since the elicited anti-RBD NAbs display a high diversity and are unaffected by NTD mutations.Moreover,an extended gap between the third and second doses of ZF2001 leads to better neutralizing activity and tolerance to 501Y.V2 than the standard three-dose administration.Together,these results suggest that the deployment of RBD-vaccines,through a third-dose boost,may be ideal for combating SARS-CoV-2 variants when necessary,especially for those carrying mutations that disrupt the NTD supersite. | Yunlong Cao Ayijiang Yisimayi Yali Bai Weijin Huang Xiaofeng Li Zhiying Zhang Tianjiao Yuan Ran An Jing Wang Tianhe Xiao Shuo Du Wenping Ma Liyang Song Yongzheng Li Xiang Li Weiliang Song Jiajing Wu Shuo Liu Xuemei Li Yonghong Zhang Bin Su Xianghua Guo Yangyang Wei Chuanping Gao Nana Zhang Yifei Zhang Yang Dou Xiaoyu Xu Rui Shi Bai Lu Ronghua Jin Yingmin Ma Chengfeng Qin Youchun Wang Yingmei Feng Junyu Xiao Xiaoliang Sunney Xie | 2021 | Cell Research2021，31，7： | 12 |
| 2 | Improving Throughput of Communication Link in IEEE 802.15.4 Based Energy-Harvesting Wireless Sensor Network显示文摘It is critical to design a reliable packet transmission scheme to improve throughput in Energy harvesting Wireless sensor network(EH-WSN)or Battery free Wireless sensor network(BF-WSN).We present the Optimal size and rate(OSR)scheme to improve throughput of communication links in the IEEE 802.15.4 based BF-WSN that harvests radio frequency energy.Based on the defined truncated geometrical distribution,we formulate the optimization problem that maximizes the effective throughput of communication link.The solution of the optimization problem yields the optimal triple,namely the optimal packet size,data rate,and Maximum number of transmission trials(MNTT),which is used in the OSR so that throughput is considerably improved.Simulation results show the OSR scheme can improve throughput. | BAI Nana GONG Siliang SHI Haiyan CHENG Zhen ZHU Yihua | 2019 | Chinese Journal of Electronics2019，28，4： | 4 |
| 3 | Etching approach to hybrid structures of PtPd nanocages and graphene for efficient oxygen reduction reaction catalysts显示文摘Cathodic oxygen reduction reaction (ORR) is a highly important electrochemical reaction in renewable-energy technologies. In general, the surface area, exposed facets and electrical conductivity of catalysts all play important roles in determining their electrocatalytic activities, while their performance durability can be improved by integration with supporting materials. In this work we have developed a method to synthesize hybrid structures between PtPd bimetallic nanocages and graphene by employing selective epitaxial growth of single-crystal Pt shells on Pd nanocubes supported on reduced graphene oxide (rGO), followed by Pd etching. The hollow nature, {100} surface facets and bimetallic composition of PtPd nanocages, together with the good conductivity and stability of graphene, enable high electrocatalytic performance in ORR. The obtained PtPd nanocage-rGO structures exhibit mass activity (0.534 A.m-1) and which are 4.4 times and 3.9 times greater than the specific activity (0.482 mA-cm-2) corresponding values for Pt/C. | Song Bai Chengming Wang Wenya Jiang Nana Du Jing Li Junteng Du Ran Long Zhengquan Li Yujie Xiong | 2015 | Nano Research2015，8，9： | 3 |
| 4 | Source apportionment of polycyclic aromatic hydrocarbons(PAHs) in a sediment core from Lake Dagze Co, Tibetan Plateau, China: Comparison of three receptor models显示文摘Receptor models are a useful tool for identifying sources of polycyclic aromatic hydrocarbons(PAHs) in multiple environmental media. In this study, three different receptor models(including the principal component analysis-multiple linear regression(PCA-MLR), positive matrix factorization(PMF), and Unmix models) were used to apportion the sources of 16 priority PAHs in a sediment core of Lake Dagze Co. The ΣPAHs(sum of all 16 measured PAHs) concentrations ranged from 51.89 to 132.82 ng/g with an average of 80.39 ng/g. TheΣ PAHs were dominated by 2-3 ring PAHs, accounting for 80.12% on average, thereby indicating that they mainly originated from biomass and coal combustion and/or from long-range atmospheric transportation. The three models produced consistent source apportionment results. The greatest contributor to ΣPAHs was biomass combustion, followed by coal combustion, vehicle emissions, and petrogenic sources. Moreover, the temporal variation of the common sources was well-correlated among models. The multi-method comparison and evaluation results showed that all three models were useful tools for source apportionment of PAHs, with the PMF model providing better results than the PCA-MLR and Unmix models. The temporal trends of factor contributions were verified by PAHs with different ring numbers. Significant correlations were found between the simulated concentrations of each source factor and the PAHs with different ring numbers(P<0.01), except for the petrogenic source identified by the Unmix model(P>0.05). This study can provide useful information for further investigation of source apportionment of PAHs in the sediment cores. | Yixin Bai Kunlin Shi Heyu Yu Nana Shang Weiyue Hao Chuan Wang Tao Huang Hao Yang Changchun Huang | 2022 | Journal of Environmental Sciences2022，34，11： | 2 |
| 5 | Effects of protein oxidation, cathepsins, and various freezing temperatures on the quality of superchilled sturgeon fillets显示文摘Many aquatic products have been stored using superchilling technology, but rarely used for the storage of sturgeon fillets. In this study, we investigated the effects of protein oxidation, cathepsin, and various freezing temperatures on the quality of superchilled sturgeon fillets. Sensory evaluation results showed that the sensory attributes of superchilled (−3 °C) sturgeon fillets were acceptable three times longer (18 days) than samples stored at refrigeration temperatures (4 °C). The sarcoplasmic protein, carbonyl, myofibrillar protein, total sulfhydryl content and the surface hydrophobicity were determined using fluorescence spectrophotometry and SDS-PAGE. Results showed that superchilling might protect myofibrillar proteins from oxidation compared to refrigeration temperatures. The activity of the three cathepsins (B, L, and H) in terms of myofibrillar, mitochondria, lysosomes, and sarcoplasm demonstrated that superchilling can inhibit cathepsins activity in sturgeon and protect its muscle structure. Microscopic observations showed that as the temperature decreased, the gap area of the muscle fibers decreased, and the deformation of cross-sectional slices was gradually reduced. In addition, the freezing rate of ice crystals produced during the freezing process influenced the muscle structure, texture, and sensory attributes. Superchilled sturgeon fillets showed good hardness, chewiness, and water retention. In conclusion, superchilling technology shows promise for its ability to extend the shelf life while maintaining the texture and sensory attributes of fresh sturgeon fillets. | Nana Zhao Xianqing Yang Yujin Li Haohao Wu Yiping Chen Ruichang Gao Feng Xiao Fan Bai Jinlin Wang Zunying Liu Xin Gao Yuanhui Zhao | 2022 | Marine Life Science & Technology2022，4，1： | 1 |
| 6 | Down-Regulation of Stromal Caveolin-1 Expression in Esophageal Squamous Cell Carcinoma: A Potent Predictor of Lymph Node Metastases, Early Tumor Recurrence, and Poor Prognosis显示文摘 | Yibin Jia Nana Wang Jianbo Wang Hui Tian Wei Ma Kai Wang Bingxu Tan Guangyu Zhang Shengsi Yang Bing Bai Yufeng Cheng | 2014 | Annals of Surgical Oncology2014，，1： | 1 |
| 7 | Laboratory and pilot scale studies on fast pyrolysis of corn stover显示文摘In order to design a hot ceramic ball heated down-flow tuber reactor for the pyrolysis liquefaction of agricultural residues,the devolatilization characteristics of pulverized corn stover were studied in a Laminar Entrained Flow Furnace(LEFF)with the temperature range of 800-950 K.The flow characteristics of corn stover particles and ceramic balls in a vertical square tube were measured and analyzed by the techniques of particle image velocimetry(PIV).The devolatilization experiments were carried out in an isothermal manner and the maximum of volatile matter of pulverized corn stover particles was 72.68%with the residence time of 189 ms at 950 K.Parameters of the first order Arrhenius equation for describing the pulverized corn stover flash pyrolysis were determined.In the PIV experiments,the corn stover particle axial velocity were measured at different cross-sections of the tube for different conditions.For the tuber connected with a suction pump,the maximum velocity was about 0.79 m/s,determined by the flow rate of the suction pump.Finally,a hot ceramic ball heated down-flow tuber reactor was constructed for pilot demonstration.The capacity of the reactor was 110.5 kg/h of corn stover powder and the yield of bio-oil was 41.6%of the feed stock. | Yi Weiming Bai Xueyuan Li Zhihe Wang Lihong Wang Nana Yang Yanqiang | 2008 | International Journal of Agricultural and Biological Engineering2008，1，1： | 1 |
| 8 | Dual redox catalysis of VN/nitrogen-doped graphene nanocomposites for high-performance lithium-sulfur batteries显示文摘Lithium-sulfur(Li-S)batteries are regarded as one of the promising candidates for the next-generation energy storage system owing to their high capacity and energy density.However,the durable operation for the batteries is blocked by the shuttle behavior of soluble lithium polysulfides and the sluggish kinetics in the redox process.Here,VN nanoparticles on nitrogen-doped graphene(VN/NG)composite is synthesized by simple calcining method to modify the separators,which can not only chemically trap polysulfides,but also catalyze the conversion reaction between the polysulfides and the insoluble Li2S during the charge/discharge process.The catalytic effects of VN/NG are verified by the calculated activation energy(E_(a)),which is smaller than the counterpart with NG toward both directions of redox.Because of the synergistic adsorption-catalysis of VN/NG,the cells with VN/NG-modified separators deliver a superior rate performance(791 mAh g^(-1) at 5C)and cycling stability(863 mAh g^(-1) after 300 cycles with a low decaying rate of 0.068%per loop at 1C).This work provides a simple preparation strategy and fundamental understanding of the bifunctional catalyst for high-performance Li-S batteries. | Erdong Jing Liang Chen Shoudong Xu Wenzhi Tian Ding Zhang Nana Wang Zhongchao Bai Xianxian Zhou Shibin Liu Donghong Duan Xiangyun Qiu | 2022 | Journal of Energy Chemistry2022，31，1： | 1 |
| 9 | In vitro assembly of the bacterial actin protein MamK from 'Candidatus Magnetobacterium casensis' in the phylum Nitrospirae显示文摘 | Aihua Deng Wei Lin Nana Shi Jie Wu Zhaopeng Sun Qinyun Sun Hua Bai Yongxin Pan Tingyi Wen | 2016 | Protein & Cell2016，7，4： | 1 |
| 10 | Beyond electrode materials structure design:Binders play a vital role for battery application of micro-size electroactive materials显示文摘Micrometre-sized electroactive particles with high tapping density show significant potential for commercial application since they effectively alleviate low Coulombic efficiency and excessive solid electrolyte interphase(SEI)issues brought by nanostructures.Furthermore,optimizing the electrode architecture using novel design concepts can improve the energy density.Beyond the electrode material structure design strategy,binder plays a vital role in providing the mechanical stability and regulating the charge transport.This highlight presents the latest development to design high-capacity batteries by optimizing the binder structures in electrodes and emphasizes the significance of binder design for further commercial application. | Mingyue Wang Zhongchao Bai Nana Wang | 2023 | Nano Research Energy2023，2，3： | 1 |
| 11 | Promises and Challenges of Sn-Based Anodes for Sodium-Ion Batteries显示文摘Sn-based composites are considered as one of the promising anode materials for sodium-ion batteries(SIBs)due to their high theoretical capacities and suitable operation voltages.However,they suffer the huge volume change and unstable electrolyte/electrode interface during sodiation/desodiation,which causes structure collapse and serious capacity loss.In the past few years,great efforts have been made to ameliorate the performances of Sn by rationally designing electrode structures/components or optimizing electrolyte composition.Here,the underlying sodium-storage reactions in Sn are summarized based on the results from theoretical calculations and advanced characterizations.Then,the recent progresses of Sn-based composites,i.e.,Sn-based alloys,Sn/C composites,and Sn oxides/sulfides,with various structures for SIBs are discussed in details.After that,how the electrolyte affects solid-electrolyte interphase and the electrochemical performances is shown.Finally,the future directions for the applications of Sn-based composites in SIBs are suggested.Hence,this review provides a comprehensive scenario about the applications of Sn-based composites in SIBs.It will benefit the future development of alloy-type anodes in SIBs. | Chenjing Hu Xiaoxiao Hou Zhongchao Bai Longteng Yun Xuanrui Zhang Nana Wang Jian Yang | 2021 | Chinese Journal of Chemistry2021，39，10： | 0 |
| 12 | Propagation characteristics of low-frequency axisymmetric waves in fluid-filled pipes embedded in the viscoelastic medium显示文摘The propagation characteristics of the low-frequency axisymmetric waves in buried fluid-filled pipes are investigated theoretically,based on the Kennard thin-walled shell equations,the Helmholtz equation,and the Kelvin-Voigt linear viscoelastic model.Analytic expressions of the phase velocity are derived for both the fluid-dominated wave and the shell-compressed wave under lubricated contact,via considering the surrounding soil as a viscoelastic medium.The dispersion and attenuation curves of the two wave types are obtained and verified numerically.The ratio of the radial pipe wall displacements is analyzed,with particular emphasis on the effects of the thickness-to-radius ratio and the quality factor on the dispersion and attenuation characteristics of the fluid-dominated wave.The results show that the viscoelastic property has slight effects on the phase velocities of the two wave types,but it influences the attenuation severely.The fluid-dominated wave influences the radial pipe wall displacement significantly and is the primary carrier of leakage noise energy;its phase velocity increases as a function of the thickness-to-radius ratio while the attenuation decreases.It also shows that the dispersion and attenuation of the fluid-dominated wave decrease as a function of the quality factor.The work will provide insights and guidance for the leakage detection of buried fluid-filled pipes. | QIAN Jiawen HAN Qingbang SU Nana BAI Le QIAN Xintong | 2022 | Chinese Journal of Acoustics2022，41，3： | 0 |
| 13 | A general synthesis of inorganic nanotubes as high-rate anode materials of sodium ion batteries显示文摘Ino rganic tubular materials have an exceptionally wide range of applications,yet developing a simple and universal method to controllably synthesize them remains challenging.In this work,we report a vaporphase-etching hard-template method that can directly fabricate tubes on various thermally stable oxide and sulfide materials.This synthesis method features the introduction of a vapor-phase-etching process to greatly simplify the steps involved in preparing tubular materials and avoids complicated postprocessing procedures.Furthermore,the in-situ heating transmission electron microscopy(TEM)technique is used to observe the dynamic formation process of TiO_(2-x) tubes,indicating that the removal process of the Sb2S3 templates first experienced the Rayleigh instability,then vapor-phase-etching process.When used as an anode for sodium ion batteries,the TiO_(2-x) tube exhibits excellent rate performance of134.6 mA h g^(-1) at the high current density of 10 A g^(-1) and long-term cycling over 7000 cycles.Moreover,the full cell demonstrates excellent cycling performance with capacity retention of 98%after 1000 cycles,indicating that it is a promising anode material for batteries.This method can be expanded to the design and synthesis of other thermally-stable tubular materials such as ZnS,MoS_(2),and SiO_(2). | Chunting Wang Ningyan Cheng Zhongchao Bai Qinfen Gu Feier Niu Xun Xu Jialin Zhang Nana Wang Binghui Ge Jian Yang Yitai Qian Shixue Dou | 2023 | Journal of Energy Chemistry2023，，2： | 0 |
| 14 | Mo2C@3D ultrathin macroporous carbon realizing efficient and stable nitrogen fixation显示文摘Ammonia is a key feedstock of fertilizers for farming and convenient hydrogen carrier as an emerging clean fuel,but industrial ammonium production process,Haber-Bosch reaction,is an energy-intensive process,consuming 1%–2%of global energy and producing 3%global CO2.Electrochemical nitrogen reduction reaction(NRR)is one of the most promising routes to realize highly efficient NH3 production under ambient conditions.However,up to now,few precious-metal-free electrocatalysts with desirable catalytic performance have been explored.In this work,Mo2C nanodots anchored on three-dimensional ultrathin macroporous carbon(Mo2C@3DUM-C)framework is developed toward significantly enhanced nitrogen reduction reaction.Thanks to the special structural design of 3D ultrathin macroporous carbon and highly active and stable Mo2C toward N2 electrochemical reduction,the Mo2C@3DUM-C framework exhibits a high Faradaic efficiency of 9.5%for NH3 production at−0.20 V and the yield rate reaches 30.4µg h−1 mgMo2C−1.Further electrochemical characterizations reveal the enhanced electron transfer and increased electrochemical surface area in the 3D macroporous carbon framework.Moreover,the Mo2C@3DUM-C electrocatalysts hold high catalytic stability after long-term NRR test.The temperature-dependent yield rate of NH3 demonstrates that the activation energy of nitrogen reduction on the employed catalyst was calculated to be 28.1 kJ mol−1.Our proposed earth-abundant Mo2C@3DUM-C demonstrates an alternative insight into developing efficient and stable nitrogen fixation catalysts in acids as alternatives to noble metal catalysts. | Zhiwei Fang Desiree Fernandez Nana Wang Zhongchao Bai Guihua Yu | 2020 | Science China Chemistry2020，63，11： | 0 |
| 15 | Nanostructure designing and hybridizing of high-capacity silicon-based anode for lithium-ion batteries显示文摘Lithium-ion batteries have long been used in electronic products and electric vehicles,but their energy density is slowly failing to keep up with demand.Because of its extraordinarily high theoretical specific capacity,silicon is regarded as the most potential next-generation anode material for practical lithium-ion batteries.However,its unavoidable volume expansion issue can cause electrode deformation and loss of electrical contact during cycling,resulting in significant performance reduction.This work reviews and evaluates the modification measures of Si,SiO,and SiO_(2) as anode materials in order to address the challenges that silicon-based anode materials encounter.We not only review their lithium storage mechanism,but also focus on nanostructure designing and hybridizing to improve the electrochemical performance of silicon-based anodes.The silicon-based anodes can exhibit exceptional capacity retention and excellent rate performance after structural optimization and hybridization,which will greatly facilitate their commercial application.Finally,we discuss our thoughts and recommendations for the future development of silicon-based materials. | Longzhi Li Yue Deng Kunkun Hu Bangqiang Xu Nana Wang Zhongchao Bai Xun Xu Jian Yang | 2023 | Progress in Natural Science:Materials International2023，33，1： | 0 |
| 16 | Engineered nitrogen doping on VO_(2)(B)enables fast and reversible zinc-ion storage capability for aqueous zinc-ion batteries显示文摘Vanadium-based compounds with high theoretical capacities and relatively stable crystal structures are potential cathodes for aqueous zinc-ion batteries(AZIBs).Nevertheless,their low electronic conductivity and sluggish zinc-ion diffusion kinetics in the crystal lattice are greatly obstructing their practical application.Herein,a general and simple nitrogen doping strategy is proposed to construct nitrogen-doped VO_(2)(B)nanobelts(denoted as VO_(2)-N)by the ammonia heat treatment.Compared with pure VO_(2)(B),VO_(2)-N shows an expanded lattice,reduced grain size,and disordered structure,which facilitates ion transport,provides additional ion storage sites,and improves structural durability,thus presenting much-enhanced zinc-ion storage performance.Density functional theory calculations demonstrate that nitrogen doping in VO_(2)(B)improves its electronic properties and reduces the zinc-ion diffusion barrier.The optimal VO_(2)-N400 electrode exhibits a high specific capacity of 373.7 mA h g^(-1)after 100 cycles at 0.1 A g^(-1)and stable cycling performance after 2000 cycles at 5 A g^(-1).The zinc-ion storage mechanism of VO_(2)-N is identified as a typical intercalation/de-intercalation process. | Xin Gu Juntao Wang Xiaobin Zhao Xin Jin Yuzhe Jiang Pengcheng Dai Nana Wang Zhongchao Bai Mengdi Zhang Mingbo Wu | 2023 | Journal of Energy Chemistry2023，，10： | 0 |
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