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| 1 | Recent advances in nanoporous graphene membrane for gas separation and water purification显示文摘Graphene is a one-atom-thick sheet of graphite comprising sp2-hybridized carbon atoms arranged in the hexagonal honeycomb lattices. By removing the honeycomb lattices and forming nanopores with specific geometry and size, nanoporous graphene has been demonstrated as a very high-efficiency separation membrane, due to the ultrafast molecular permeation rate for its one-atom thickness. This review focuses on the recent advances in nanoporous graphene membrane for the applications of gas separation and water purification, with a major emphasis on the molecular permeation mechanisms and the advanced fabrication methods of this state-of-the-art membrane. We highlight the advanced theoretical and experimental works and discuss the gas/water molecular transport mechanisms through the graphene nanopores accompanied with theoretical models. In addition, we summarize some representative membrane fabrication methods, covering the graphene transfer to porous substrates and the pore generation. We anticipate that this review can provide a platform for understanding the current challenges to make the conceptual membrane a reality and attracting more and more attentions from scientists and engineers. | Chengzhen Sun Boyao Wen Bofeng Bai | 2015 | Science Bulletin2015，60，21： | 8 |
| 2 | Molecular sieving through a graphene nanopore: non-equilibrium molecular dynamics simulation显示文摘Two-dimensional graphene nanopores have shown great promise as ultra-permeable molecular sieves based on their size-sieving effects. We design a nitrogen/hydrogen modified graphene nanopore and conduct a transient non-equilibrium molecular dynamics simulation on its molecular sieving effects. The distinct time-varying molecular crossing numbers show that this special nanopore can efficiently sieve CO_2 and H_2S molecules from CH_4 molecules with high selectivity. By analyzing the molecular structure and pore functionalization-related molecular orientation and permeable zone in the nanopore, density distribution in the molecular adsorption layer on the graphene surface, as well as other features, the molecular sieving mechanisms of graphene nanopores are revealed. Finally, several implications on the design of highly-efficient graphene nanopores, especially for determining the porosity and chemical functionalization, as gas separation membranes are summarized based on the identified phenomena and mechanisms. | Chengzhen Sun Bofeng Bai | 2017 | Science Bulletin2017，62，8： | 5 |
| 3 | Increased lateral root formation by CRISPR/Cas9-mediated editing of arginase genes in cotton显示文摘Dear Editor,Proper development of plant roots is critical for primary physiological functions,including water and nutrient absorption and uptake,physical support,and carbohydrate storage(Zhang et al.,2010).Crop root systems act as the key organ for sensing and response to abiotic and biotic stresses.Previous studies of crop root system development suggest that increased lateral root formation(LRF)could | Yanling Wang Zhigang Meng Chengzhen Liang Zhaohong Meng Yuan Wang Guoqing Sun Tao Zhu Yongping Cai Sandui Guo Rui Zhang Yi Lin | 2017 | Science China(Life Sciences)2017，60，5： | 3 |
| 4 | Semiempirical equations of state of H_(2)O/CO_(2) binary mixtures in graphite nanoslits显示文摘The existence of confining walls limits the prediction accuracy of nanoconfined fluids using macroscopic equations of state(EOSs);moreover,appropriate EOSs for multicomponent mixture fluids in nanoconfined spaces are missing.Here,we derive the EOS of multicomponent mixture fluids confined in nanospaces at high temperatures and pressures,mainly considering the nanoconfinement effect and the competitive adsorption effect between different components.Then,the EOSs are validated through comparison with the molecular dynamics-simulated Pv T data of CO_(2)/H_(2)O mixtures in graphite nanoslits.To consider the above effects,we derive two EOSs via two modeling methods:EOS I is obtained through modification of the actual component occupation volume in the Peng-Robinson equation of state(PR EOS)by fitting the binary component interaction coefficient and the number of adsorbed molecules according to a selectivity coefficient,while EOS II is obtained by considering the decreased pressure of the fluids in PR EOS by adding an attractive term between components and walls.With the simulation results as a benchmark,the two EOSs exhibited good prediction accuracies under low CO_(2) concentrations,and generally,EOS II was more accurate than EOS I.This study fills the gap in the EOSs of nanoconfined mixture fluids,and the obtained equations can help to further describe the thermodynamic properties of confined mixture fluids. | Haoxuan Li Bin Zhao Chengzhen Sun Bofeng Bai | 2023 | Science China(Physics,Mechanics & Astronomy)2023，66，8： | 2 |
| 5 | Anomalous Enhancement in Thermal Conductivity ofNanofluid Induced by Solid Walls in a Nanochannel显示文摘 | SUN Chengzhen LU Wenqiang BAI Bofeng | 2011 | Applied Thermal Engineering2011，31，17： | 1 |
| 6 | Molec- ular Dynamics Simulation of Nanofluid's Effective Ther- mal Conductivity in High-Shear-Rate Couette Flow 显示文摘 | SUN Chengzhen LU Wenqiang BAI Bofeng | 2011 | International Journal of Heat and Mass Transfer2011，54，11： | 1 |
| 7 | Molecu-lar Dynamics Simulation of Nanofluid's Effective ThermalConductivity in High-Shear-Rate Couette Flow显示文摘 | SUN Chengzhen LU Wenqiang LIU Jie | 2011 | Inter-national Journal of Heat and Mass Transfer2011，54，11： | 1 |
| 8 | Security Control for Uncertain Networked Control Systems under DoS Attacks and Fading Channels显示文摘This paper characterizes the joint effects of plant uncertainty,Denial-of-Service(DoS)attacks,and fading channel on the stabilization problem of networked control systems(NCSs).It is assumed that the controller remotely controls the plant and the control input is transmitted over a fading channel.Meanwhile,considering the sustained attack cycle and frequency of DoS attacks are random,the packet-loss caused by DoS attacks is modelled by a Markov process.The sampled-data NCS is transformed into a stochastic form with Markov jump and uncertain parameter.Then,based on Lyapunov functional method,linear matrix inequality(LMI)-based sufficient conditions are presented to ensure the stability of uncertain NCSs.The main contribution of this article lies in the construction of NCSs based on DoS attacks into Markov jump system(MJS)and the joint consideration of fading channel and plant uncertainty. | Chengzhen Gao Cheng Tan Hongtao Sun Mingyue Xiang | 2022 | Journal of Beijing Institute of Technology2022，31，4： | 1 |
| 9 | CsTRM5 regulates fruit shape via mediating cell division direction and cell expansion in cucumber显示文摘Fruit shape and size are important appearance and yield traits in cucumber,but the underlying genes and their regulatory mechanisms remain poorly understood.Here we identified a mutant with spherical fruits from an Ethyl Methane Sulfonate(EMS)-mutagenized library,named the qiu mutant.Compared with the cylindrical fruit shape in 32X(wild type),the fruit shape in qiu was round due to reduced fruit length and increased fruit diameter.MutMap analysis narrowed the candidate gene in the 6.47 MB range on Chr2,harboring the FS2.1 locus reported previously.A single-nucleotide polymorphism(SNP)(11359603)causing a truncated protein of CsaV3_2G013800,the homolog of tomato fruit shape gene SlTRM5,may underlie the fruit shape variation in the qiu mutant.Knockout of CsTRM5 by the CRISPR-Cas9 system confirmed that CsaV3_2G013800/CsTRM5 was the causal gene responsible for qiu.Sectioning analysis showed that the spherical fruit in qiu resulted mainly from increased and reduced cell division along the transverse and longitudinal directions,respectively.Meanwhile,the repressed cell expansion contributed to the decreased fruit length in qiu.Transcriptome profiling showed that the expression levels of cell-wall-related genes and abscisic acid(ABA)pathway genes were significantly upregulated in qiu.Hormone measurements indicated that ABA content was greatly increased in the qiu mutant.Exogenous ABA application reduced fruit elongation by inhibiting cell expansion in cucumber.Taken together,these data suggest that CsTRM5 regulates fruit shape by affecting cell division direction and cell expansion,and that ABA participates in the CsTRM5-mediated cell expansion during fruit elongation in cucumber. | Yang Xie Xiaofeng Liu Chengzhen Sun Xiaofei Song Xiaoli Li Haonan Cui Jingyu Guo Liu Liu Ao Ying Zeqin Zhang Xueyun Zhu Liying Yan Xiaolan Zhang | 2023 | Horticulture Research2023，10，3： | 1 |
| 10 | Shear-Rate Dependent Effective Thermal Conductivity of H2O+SiO2 Nanofluids显示文摘 | SUN Chengzhen LU Wenqiang BAI Bofeng | 2013 | Physics of Fluids2013，25，05： | 1 |
| 11 | CsIPT1b and CsUGT85A2 delay female corolla opening in cucumber by regulating the content of cytokinins显示文摘Corolla opening is essential for the propagation of unisexual flowering plants,meanwhile commodity fruits with opening corolla have higher commodity value in cucumber fresh food market.Until now,there is little research on the mechanism of corolla opening in cucumber.In a previous paper,we identified a unique cucumber(Cucumis sativus)line(‘6457’)that possesses super ovaries and shows delayed corolla opening when nutrient supplies are abundant.We also previously showed that the expression of CsIPT1b(isopentenyl transferase)and CsUGT85A2(cytokinin glycosyltransferase)is correlated with the delayed opening of the female corolla.Here,we investigated the mechanism of delayed female corolla opening in cucumber by conducting transgenic experiments,hormone assays,and yeast one-hybrid assays.CsIPT1b and CsUGT85A2 positively and negatively regulated delayed female corolla opening,respectively.In CsIPT1b-overexpressing plants and CsUGT85A2 knockout plants,the content of the trans-zeatin riboside,trans-zeatin,and N6-isopentenyladenosine was increased.Overall,our findings indicate that CsIPT1b and CsUGT85A2 were important regulators of the timing of female corolla opening.These genes could thus be targets to cucumber molecular breeding of fruit with flowers remaining on the tip. | Xiaoli Li Haonan Cui Xiaofei Song Chengzhen Sun Zhuo Ding Xueyun Zhu Xiaofeng Liu Liying Yan | 2023 | Horticultural Plant Journal2023，9，4： | 0 |
| 12 | Computer Simulation for Profiles of Impurities in Silicon Epitaxial Layer显示文摘A phenomenological model for SiCl4+H2 reduction epitaxy with PCl3 as dopant was established and the concernedparameters were obtained through experiments.We have compiled a computer simulation program of BASIC algorithmic lan-guage to solve diffusion equations numerically and have obtained profiles of impurities in epitaxial layer and in the substrate.Therelationship between resistivity of n-type epitaxial layer and the concentration and flow of PCl3 doping source under a certaingrowth condition has also been found.The optimum condition for precise control of parameters of epitaxial layer can be chosenby the computer simulation results.These results are very useful to practical production,so that the good economical benefit canbe obviously obtained. | Sun Yicai Hebei Institute of TechnologyYu Chengzhen Tianjin’s Semiconductor Material Factory | 1989 | Rare Metals1989，9，2： | 0 |
| 13 | Comparative proteomic profiles of resistant/susceptible cucumber leaves in response to downy mildew infection显示文摘Downy mildew is a serious disease in cucumber production worldwide,which is caused by Pseudoperonospora cubensis(Berk.&Curt.)Rostov.Underlying the mechanism of cucumber response to downy mildew infection is important for breeding improvement and production;however,the research remains largely elusive.A comparative proteomic approach was used to reveal the differential accumulation of the proteomes from leaves of cucumber(susceptible line and resistant line)that were inoculated with P.cubensis or not by two-dimensional electrophoresis and MALDI-TOF/TOF MS.A total of 76 protein spots were successfully identified with significant changes in abundance(>2-fold,P<0.05)in downy mildew infected or not leaves for the susceptible line and resistant line.By the functional annotation,these proteins were classified into 8 groups including photosynthesis(29%),energy and metabolism(29%),cell rescue and defense(17%),and protein biosynthesis,folding and degradation(13%),unclassified(7%),nucleotide metabolism(3%),signal transduction(1%)and cellular process(1%).Among the 17 differentially expressed proteins between the resistant and susceptible cucumber line,most of the protein spots were concentrated in cell rescue and defense(4)and energy and metabolism(4).Moreover,a schematic diagram containing majority of the metabolic pathways of cucumber leaves in response to downy mildew was proposed.This network revealed the positive effect of several functional components in cucumber seedlings’resistant to downy mildew such as accumulation of energy supply and resistance-related proteins,hastened protein metabolism and photorespiratory,inhibited photosynthesis,and triggered photosystem repair and programmed cell death.Taken together,these results have advanced a further understanding of the key metabolic pathways of cucumber resistance to downy mildew and pathogen control in the proteomic level. | Chengzhen Sun Xiaofei Song Jinshuang Zheng Xiaoli Li Zhihong Feng Liying Yan | 2021 | Horticultural Plant Journal2021，7，4： | 0 |
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