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Novel preparation and characterization of cellulose microparticles functionalized in ionic liquids

Langmuir 2009年第17期25卷 10116-10120页

作者： Lin, Chun-Xiang Zhan, Huai-Yu Liu, Ming-Hua Fu, Shi-Yu Lucia, Lucian A. State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China College of Environment and Resources Fuzhou University 350002 China Laboratory of Soft Materials and Green Chemistry Department of Wood and Paper Science North Carolina State University Raleigh NC 27695-8005 United States

Ionic liquid (IL)-reconstituted acrylic acid (AA)-functionalized cellulose microparticles were successfully prepared by a water-in-oil suspension technique preliminary modification with AA in homogeneous condition. Cellulose was fully dissolved in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) IL, and subsequently was grafted homogeneously with AA and N,N'-methylenebisacrylamide (N,N'-MBA) initiated with ammonium persulfate. The grafted cellulose was spheroidized using white silicone oil as the dispersion medium and Span 80 as a dispersant and then reconstituted from [Bmim]Cl. Reaction conditions were optimized to obtain microparticles with both the highest possible grafting efficiency and most uniform bead sizes. Fourier transform infrared spectroscopy, scanning electron microscopy, and an optical microscope were employed to provide structural information for the functionalized IL-reconstituted cellulose microparticles. These microparticles were shown to behave as good sorbents for Cu(II), Ni(II), Fe(III) ions. © 2009 American Chemical Society.

关键词： Cellulose

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Insight analysis of the cross-sensitization of multiple fish parvalbumins via the Th1/Th2 immunological balance and cytokine release from the perspective of safe consumption of fish

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Food Quality and Safety 2022年第4期6卷 690-699页

作者： Yeting Wu Youyou Lu Yuhao Huang Hong Lin Xuewen Dang Yujie Jing Zhaocheng Meng Xiangchen Wang Zhenxing Li College of Food Science and Engineering Ocean University of ChinaQingdaoChina College of Food Science and Technology Huazhong Agricultural UniversityChina Key Laboratory of Environment Correlative Dietology Ministry of Education(Huazhong Agricultural University)WuhanChina Dermatological Department the Affiliated Hospital of Medical College Qingdao UniversityQingdaoChina Medical Laboratory Department Yantaishan HospitalYantaiChina

Objectives:Parvalbumin(PV)is the primary allergen found in fish and is highly *** to some studies,some patients with fish allergy are allergic to only one species of fish but are tolerant to others;however,the underlying mechanism has not been *** and Methods:The cross-reactivity of these seven fish parvalbumins based on turbot PV-treated mice was determined using BALB/c mouse and RBL-2H3 cell ***,immunoinformatic tools were used to assess ***:The results indicated that the seven species of fishes(turbot,large yellow croaker,sea bass,grass carp,common carp,conger eel and Japanese eel)studied exhibited varying degrees of cross-reactivity,with the highest cross-reactivity being between turbot and bass and the lowest being between turbot and conger *** bioinformatics analysis revealed that the sequence homology of parvalbumin between conger eel and turbot was the lowest,which may account for the conger eel and turbot cross-reaction being so *** was a potent cross-reactive allergen found in turbot,large yellow croaker,sea bass,grass carp,common carp,conger eel and Japanese eel,and the cross-reactivity between conger eel and turbot parvalbumin was the ***:This study demonstrated that the cross-reactivity between conger eel PV and turbot PV was the weakest.

关键词： Fish immunological balance cross-reactivity sensitization parvalbumin

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Ti_(3)C_(2)T_(x)MXene doped by W atoms for full-spectrum photofixation of nitrogen

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Transactions of Nonferrous Metals Society of China 2022年第1期32卷 233-250页

作者： Qi LI Ji-liang XU San-mei WANG Kai-fu YU Wen-kun ZHU Ting-ting HOU Lan-tian ZHANG Wen-hua ZHANG Shu-quan LIANG Liang-bing WANG School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Environment-friendly Energy Materials Southwest University of Science and TechnologyMianyang 621010China CAS Key Laboratory of Materials for Energy Conversion Department of Materials Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Full-spectrum photofixation of N_(2) with remarkable NH_(3) production rate of 228μmol/(g·h)was achieved by W atoms doped Ti_(3)C_(2)T_(x)MXene(W/Ti_(3)C_(2)T_(x)-U)catalyst without sacrificial agents at room *** effects of W doping and ultrasonic intercalation of Ti_(3)C_(2)T_(x)MXene were *** transmission electron microscope,electron spin resonance spectra,X-ray photoemission spectroscopy,UV-Vis spectrophotometer,temperature programmed adsorption analyzer and density functional theory calculation were used to characterize the obtained *** showed that Ti_(3)C_(2)T_(x)MXene harvested ultraviolet-visible and near-infrared light to generate hot *** addition,the doped W atoms played an effective role in adsorbing and activating N_(2) molecules by donating electrons to the anti-bonding orbital of N_(2) molecules to elongate the bond length of N≡N.

关键词： nitrogen fixation photocatalysis MXene tungsten full-spectrum

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On-chip stackable dielectric laser accelerator

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Nuclear Science and Techniques 2023年第2期34卷 79-87页

作者： Bin Sun Yang‑Fan He Ruo‑Yun Luo Tai‑Yang Zhang Qiang Zhou Shao‑Yi Wang Jian Zheng Zong‑Qing Zhao CAS Key Laboratory of Geospace Environment Department of Plasma Physics and Fusion EngineeringUniversity of Science and Technology of ChinaHefei 230026China Laser Fusion Research Center CAEPP.O.Box 919986Mianyang 621900China The Sciences and Technology on Plasma Physics Laboratory CAEPMianyang 621900China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Department of Nuclear Plasmaand Radiological EngineeringUniversity of Illinois at Urbana-Champaign104 South Wright StreetUrbanaIL 61801USA CAS Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China IFSA Collaborative Innovation Center Shanghai Jiao Tong UniversityShanghai 200240China CAS Center for Excellence in Ultra-Intense Laser Science Shanghai 201800China

In this paper,we propose a novel stacked laser dielectric acceleration *** structure is based on the inverse Cherenkov effect and represented by a parametric design *** to existing dielectric laser accelerators relying on the inverse Smith–Purcell effect,the proposed structure provides an extended-duration synchronous acceleration field without requiring the pulse front tilting *** advantage significantly reduces the required pulse *** addition,the easy to integrate layered structure facilitates cascade acceleration,and simulations have shown that low-energy electron beams can be cascaded through high gradients over extended *** practical advantages demonstrate the potential of this new structure for future chip accelerators.

关键词： Dielectric laser accelerator Inverse Cherenkov effect Laser-driven particle acceleration

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Tree-ring-based drought variability in northern China over the past three centuries

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Journal of Geographical Sciences 2022年第2期32卷 214-224页

作者： ZENG Xueli LIU Yu SONG Huiming LI Qiang CAI Qiufang FANG Congxi SUN Changfeng REN Meng The State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentCASXi’an 710061China University of the Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Quaternary Science and Global Change CASXi’an 710061China Laboratory for Ocean Dynamics and Climate Pilot Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237ShandongChina School of Human Settlements and Civil Engineering Xi’an Jiaotong UniversityXi’an 710049China Xi’an Institute for Innovative Earth Environment Research Xi’an 710061China

Droughts are the most frequent natural disaster in regions at the margins of the East Asian summer monsoon(EASM),which pose threats to agriculture,the economy,and human ***,the limitations of only approximately 60 years of meteorological observations hamper our understanding of the characteristics and mechanisms of local *** growing in the marginal region of the EASM are usually sensitive to moisture variations and have played important roles in past hydroclimatic ***,a 303-year tree-ring-width chronology of Pinus tabulaeformis from ***,which is located in the junction of the Liaoning Province and Inner Mongolia,China,was used to reconstruct the May-August Palmer drought severity index(PDSI)in the marginal region of the *** transfer function explains 48.0%(or 47.2%after adjusting for the loss of the degrees of freedom)of the variance over the calibration period from 1946 to 2012.A spatial correlation analysis demonstrates that our PDSI reconstruction can represent the drought variability on the northernmost margin of the *** winter Asian polar vortex area index showed a delayed impact on the summer EASM precipitation in the following year.

关键词： tree-ring width Mt.Lama PDSI East Asian summer monsoon Asian polar vortex area index

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Outage Analysis of Optimal UAV Cooperation with IRS via Energy Harvesting Enhancement Assisted Computational Offloading

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Computer Modeling in engineering & Sciences 2024年第2期138卷 1885-1905页

作者： Baofeng Ji Ying Wang Weixing Wang Shahid Mumtaz Charalampos Tsimenidis School of Information Engineering Henan University of Science and TechnologyLuoyang471000China Research and Innovation Center of Intelligent System Longmen LaboratoryLuoyang471000China State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System(CEMEE) Luoyang471000China Sustainable Digital Communications and Energy Systems(DIGCOM)Group Nottingham Trent UniversityNottinghamUK

The utilization of mobile edge computing(MEC)for unmanned aerial vehicle(UAV)communication presents a viable solution for achieving high reliability and low latency *** study explores the potential of employing intelligent reflective surfaces(IRS)andUAVs as relay nodes to efficiently offload user computing tasks to theMEC server system ***,the user node accesses the primary user spectrum,while adhering to the constraint of satisfying the primary user peak interference ***,the UAV acquires energy without interrupting the primary user’s regular communication by employing two energy harvesting schemes,namely time switching(TS)and power splitting(PS).The selection of the optimal UAV is based on the maximization of the instantaneous signal-to-noise ***,the analytical expression for the outage probability of the system in Rayleigh channels is derived and *** study investigates the impact of various system parameters,including the number of UAVs,peak interference power,TS,and PS factors,on the system’s outage performance through *** proposed system is also compared to two conventional benchmark schemes:the optimal UAV link transmission and the IRS link *** simulation results validate the theoretical derivation and demonstrate the superiority of the proposed scheme over the benchmark schemes.

关键词： Unmanned aerial vehicle(UAV) intelligent reflective surface(IRS) energy harvesting computational offloading outage probability

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Water Reducer: A Highly Dispersing Binder for High-Performance Lithium-Sulfur Batteries

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Chinese Journal of Chemistry 2021年第6期39卷 1523-1530页

作者： Xin Geng Ruihao Lin Xingxing Gu Zhi Su Chao Lai College of Chemistry and Chemical Engineering Xinjiang Normal UniversityUrumqiXinjiang 830054China School of Chemistry and Materials Science Jiangsu Normal UniversityXuzhouJiangsu 221116China Chongqing Key Laboratory of Catalysis and New Environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400065China

Sulfur has been paid close attention by the research and manufacturing as a cathode material for lithium-sulfur batteries(LSB)in recent decade because it has high specific capacity and low *** the low utilization of active materials and serious shuttle phenomenon inhibit its commercialization *** this work,for the first time,water reducers are reported as multifunctional binders to address the above problems to enhance the performance of *** to the synthetic actions of the water reducer binder,such as highly dispersing effect and good chemical trapping function,commercial sulfur powders are directly used as cathodes,and much better electrochemical performance compared to using the conventional binder polyvinylidene fluoride(PVDF)was obtained,among which the sulfur cathode with sulfonated melamine formaldehyde(SMF)water reducer binder exhibits a high reversible capacity of 625.5 mA·h·g^(-1) after 200 cycles at 1 C and the cathode with polycarboxylic acid(PC)water reducer binder even demonstrates a high area specific capacity of 5 mA·h·cm^(-2) at high sulfur loading of 5 mg·cm^(-2).These low-cost water reducers are a promising binder for LSB in the future.

关键词： Energy conversion Polymers Binder Polyanions Adsorption

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Research and Implementation of a Software Runtime Fault Propagation Path Acquisition Method

Research and Implementation of a Software Runtime Fault Prop...

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International Conference on Quality, reliability, Risk, Maintenance, and Safety engineering (ICQR2MSE)

作者： Songzheng Li Minyan Lu Shiyi Kong The Key Laboratory on Reliability and Environmental Engineering Technology Beihang University Beijing P.R. China

ISBN: (数字)9781728114279

ISBN: (纸本)9781728114286

A software fault may lead to a software failure by propagating among software modules. The identification of the software fault propagation path is the key to learn the behavior characteristics of software fault propagation which can help understand the software fault propagation mode and improve the reliability of the software system. Propose the definition of software fault propagation path. Classify according to different characteristics of software fault propagation path. Use the GDB debugger in a Linux environment for relevant parameters in normal operation and fault injection of the C language software. Construct a call relationship between software function modules and obtain the fault propagation path based on the collected data. Finally verify the method by the open source software grep. The main innovation of this paper is the comparison algorithm of the fault propagation path.

关键词： Software reliability Runtime reliability engineering Software systems Fault diagnosis

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Features of the new climate normal 1991-2020 and possible influences on climate monitoring and prediction in China

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Advances in Climate Change Research 2023年第6期14卷 930-940页

作者： Xiao-Juan WANG Ya TUO Xiao-Fan LI Guo-Lin FENG College of Electronic and Information Engineering Changshu Institute of TechnologySuzhou 215100China Deparment of Amospheric and Oceanic Sciences&Institute of Atmospheric Sciences Fudan UniversityShanghai 200433China Hebei Climate Center/China Meteorological Administration Xiong'an Atmospheric Boundary Layer Key Laboratory/Key Laboratory of Meteorology and Ecological Environment of Hebei Province Shijiazhuang 050021China Laboratory for Climate Studies National Climate Research Center China Meteorological AdministrationBeijing 10o081China

An update on the climate norms each decade is recommended by the World Meteorological Organization(WMO)partly to keep pace with conditions as climate changes over *** accordance with such update,this study documents the features of the new climate normal defined for 1991-2020 and its impacts on climate monitoring and prediction in *** on-site observation and model prediction datasets,our analysis reveals that the new normal of national average precipitation of China during winter and summer is respectively 3.0 and 10.8 mm higher than that of the period *** a result,precipitation observations during 1961-2020 consistently fall below the new *** adjustment of thresholds for precipitation extremes with new climate normals results in a decrease of extreme precipitation occurrence by 0.2-0.8 d on average over the winter and summer seasons during ***,the application of new climate normals induces more pronounced negative temperature anomalies across most areas of *** adjustments of extreme temperature thresholds have led to an increased occurrence of extremely cold days by 1-2 d on average over 1961-2020,while the frequency of extremely hot days decreases by more than 1.4 ***,it is implied that with the development of global warming,the baselines for temperature and precipitation are *** application of the new climate normal may result in the omission of relative threshold based extreme events,promoting increased focus on climate risk reduction ***,the average anomaly sign consistency rates(Pcs)of precipitation and temperature anomaly predictions,relative to the new normal and produced by the Beijing Climate Center,are consistently lower than those relative to the old *** decrease in Pcs implies new challenges for climate prediction,especially for temperature prediction.

关键词： Climate normal Temperature Precipitation Extreme climate event Prediction

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Functional characterization of caffeic acid O-methyltransferase in internode lignification of switchgrass(Panicum virgatum)

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Frontiers of Agricultural Science and engineering 2018年第1期5卷 98-107页

作者： Fengyan WU Zhenying WU Aiguo YANG Shanshan JIANG Zeng-Yu WANG Chunxiang FU Key Laboratory of Energy Genetics of Shandong Province/Qingdao Engineering Research Center of Biomass Resources and Environment/Key Laboratory of Biofuels/Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Tobacco Research Institute Chinese Academy of Agricultural Sciences Forage Improvement Division The Samuel Roberts Noble Foundation

Caffeic acid O-methyltransferase(COMT) is a crucial enzyme that mainly methylates phenylpropanoid meta-hydroxyl of C5 in the biosynthesis of syringyl lignin in angiosperms. A putative COMT, named as PvCOMT1,was isolated from switchgrass(Panicum virgatum), a C4 warm-season dual-purpose forage and bioenergy crop. Our results showed that recombinant PvCOMT1 enzyme protein catalyzed the methylation of 5-OH coniferyl alcohol, 5-OH coniferaldehyde(CAld5H) and 5-OH ferulic acid. Further in vitro studies indicate that CAld5H can dominate COMT-mediated reactions by inhibiting the methylation of the other substrates. Transgenic switchgrass plants generated by an RNAi approach were further employed to study the function of COMT in internode lignification. A dramatic decrease in syringyl lignin units coupled with an obvious incorporation in 5-OH guaiacyl lignin units were observed in the COMT-RNAi transgenic plants. However, the constitutive suppression of COMT in switchgrass plants altered neither the pattern of lignin deposition along the stem nor the anatomical structure of internodes. Consistent with the biochemical characterization of PvCOMT1, a significant decrease in sinapaldehyde was found in the COMT-RNAi transgenic switchgrass plants, suggesting that CAld5H could be the optimal intermediate in the biosynthesis syringyl lignin.

关键词： biofuel crop caffeic acid O-methyltransferase forage lignin Panicum virgatum switchgrass transgenic plant

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