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Effects of nano-silicon and common silicon on lead uptake and translocation in two rice cultivars

Frontiers of Environmental Science & Engineering 2015年第5期9卷 905-911页

作者： Jianguo liu Hui CAI congcong MEI Mingxin WANG School of Environmental and Safety Engineering Changzhou University Changzhou 213164 China

The current study investigated the effects of nano-silicon （Si） and common Si on lead （Pb） toxicity, uptake, translocation, and accumulation in the rice cultivars Yangdao 6 and Yu 44 grown in soil containing two different Pb levels （500 ***-1 and 1000 ***）. The results showed that Si application alleviated the toxic effects of Pb on rice growth. Under soil Pb treatments of 500 and ***-1, the biomasses of plants supplied with common Si and nano-Si were 1.8%-5.2% and 3.3%- 11.8% higher, respectively, than those of plants with no Si supply （control）. Compared to the control, Pb concentra- tions in rice shoots supplied with common Si and nano-Si were reduced by 14.3%-31.4% and 27.6%-54.0%, respectively. Pb concentrations in rice grains treated with common Si and nano-Si decreased by 21.3%-40.9% and 38.6%--64.8%, respectively. Pb translocation factors （TFs） from roots to shoots decreased by 15.0%-29.3% and 25.6%-50.8%, respectively. The TFs from shoots to grains reduced by 8.3 %--13.7% and 15.3%-21.1%, respectively, after Si application. The magnitudes of the effects observed on plants decreased in the following order： nano-Si treatment 〉 common Si treatment and high-grain- Pb-accumulating cultivar （Yangdao 6）〉 low-grain-Pb- accumulatir~ cultivar （Yu 44） and heavy Pb stress （1000 ***-1）〉 moderate Pb stress （500 mg-kg-1）〉 no Pb treatment. The results of the study indicate that nano-Si is more efficient than common Si in ameliorating the toxic effects of Pb on rice growth, preventing Pb transfer from rice roots to aboveground parts, and blocking Pb accumulation in rice grains, especially in high-Pb- accumulating rice cultivars and in heavily Pb-polluted soils.

关键词： silicon (Si) lead (Pb) rice (Oryza sativa L.),toxicity accumulation

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Research Article Core/hybrid-shell structures boost thermoelectric performance of flexible inorganic/organic nanowire films

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Nano Research 2023年第4期16卷 5702-5708页

作者： Changcun Li Xiaoqi Lan Peipei liu Jingkun Xu Qinglin Jiang congcong liu Cheng liu Fengxing Jiang Jiangxi Key Laboratory of Flexible Electronics Jiangxi Science and Technology Normal UniversityNanchang 330013China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Interface control in inorganic/organic composites has always been regarded as one of the effective means to optimize their thermoelectric(TE)performance,and the past few years have witnessed its development,including carrier-energy filtering and phonon ***,the energy barrier created by the band alignment at the composite interface depends on the Fermi level difference between the organic and inorganic components,which is difficult to be controlled by the common ***,a core/hybrid-shell strategy aiming for efficient interface control is proposed to tune the energy barrier of the inorganic/organic core/shell nanowire *** Fermi level of hybrid-shell can be effectively controlled by separating the charge carriers compared to the single-shell *** energy barrier of the core/hybrid-shell interface is tuned to an appropriate position,and the energy filtering effect is utilized,resulting in a substantial improvement in power factor and reduction in thermal conductivity for the prepared core/hybrid-shell composites with good air-stability and ***,both the flexible p type and p-n type TE devices based on the prepared core/hybrid-shell films yield excellent output properties with the maximum power densities of 41 and 45μW·cm^(−2)at a temperature difference of ca.30 K,*** study provides a novel strategy to improve the TE performance of the inorganic/organic composites,displaying great potential for low-power wearable electronics.

关键词： hybrid-shell nanowires surface modification thermoelectric materials flexible electronics

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Porphyrin-based metal-organic framework nanocrystals for combination of immune and sonodynamic therapy

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Nano Research 2023年第7期16卷 9633-9641页

作者： Sen Jiang congcong liu Qijia He Kun Dang Weiwei Zhang Yang Tian Department of Chemistry Analytical Instrumentation CenterCapital Normal UniversityBeijing 10048China School of Life Science Capital Normal UniversityBeijing 10048China

Immune therapy based on programmed death-ligand 1(PD-L1)is widely used to treat human *** current strategies to improve immune checkpoint blockade therapy fail in rescuing increased expression of PD-L1 in tumor ***,we for the first time synthesized the metal-organic framework(MOF)nanocrystals of rare-earth element dysprosium(Dy)coordinated with tetrakis(4-carboxyphenyl)porphyrin(TCPP),which show well-defined two-dimensional *** MOF nanocrystals of Dy-TCPP could apparently reduce PD-L1 expression in tumor cells both in vitro and in vivo,and therefore display effective tumor treatment through immune therapy without any immune checkpoint inhibitor *** the sensitivity of TCPP ligand toward ultrasound,the prepared Dy-TCPP can also realize sonodynamic therapy(SDT)besides immune *** addition,the Dy-TCPP nanocrystals can efficiently obtain T_(2)-weight magnetic resonance imaging(MRI)of tumor *** study provides the Dy-TCPP nanocrystals as promising diagnostic MRI-guided platforms for the combined treatment on tumors with SDT and immune ***,this strategy succeeds in reducing the elevated expression of PD-L1 in tumor cells,which might serve as a novel avenue for tumor immunotherapy in future.

关键词： metal-organic frameworks(MOFs) nanosheet porphyrin immune therapy sonodynamic therapy(SDT)

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Wetting sub-nanochannels via ionic hydration effect for improving charging dynamics

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Green Energy & Environment 2024年第3期9卷 473-480页

作者： Yayun Shi Xiaoli Zhao Qihang liu Zhenghui Pan congcong liu Shanyi Zhu Zhijun Zuo Xiaowei Yang State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of TechnologyTaiyuan030024China School of Materials Science and Engineering Tongji UniversityShanghai201804China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai200240China

The ionic transport in sub-nanochannels plays a key role in energy storage,yet suffers from a high energy *** sub-nanochannels is crucial to accelerate ionic transport,but the introduction of water is challenging because of the hydrophobic extreme *** propose wetting the channels by the exothermic hydration process of pre-intercalated ions,the effect of which varies distinctly with different ionic hydration structures and *** to the failed pre-intercalation of SO_(4)^(2-),HSO_(4)^(-) with weak hydration energy results in a marginal effect on the HOMO(Highest Occupied Molecular Orbital)level of water to avoid water splitting during the electrochemical ***,the ability of water introduction is reserved by the initial incomplete dissociation state of HSO_(4)^(-),so the consequent exothermic reionization and hydration processes of the intercalated HSO_(4)^(-) promote the water introduction into sub-nanochannels,finally forming the stable confined water through hydrogen bonding with functional *** wetted channels exhibit a significantly enhanced ionic diffusion coef-ficient by~9.4 times.

关键词： Sub-nanochannels Ionic hydration Ionic transport Supercapacitors Confined water

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Flow resistance in the channel-bar landscape of large alluvial rivers

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Frontiers of Earth Science 2024年第2期18卷 412-421页

作者： Yong HU congcong liu Jinyun DENG Wei ZHANG Yitian LI State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China CCCC Second Harbor Engineering Company Ltd Wuhan 430040China Key Laboratory of Large-span Bridge Construction Technology Wuhan 430040China Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure Wuhan 430040China CCCC Highway Bridge National Engineering Research Centre Co.Ltd Wuhan 430040China

Accurate approaches for estimating flow resistance in large alluvial rivers are fundamental for simulating discharge,sediment transport,and flood ***,methods for estimating riverbed resistance and additional resistance in the channel-bar landscapes remain poorly *** this study,we used in situ river bathymetry,sediment,and hydraulic data from the Shashi Reach in the Yangtze River to develop a semi-empirical approach for calculating flow *** method quantitatively separates flow resistance into riverbed resistance and additional resistance and shows high accuracy in terms of deviation ratio(~20%),root-mean-square error(~0.008),and geometric standard deviation(~3).Additional resistance plays a dominant role under low-flow conditions but a secondary role under high flows,primarily due to the reduction in momentum exchange in channel-bar regions as discharge *** resistance first decreases and then increases,which might be attributed to bedform changes in the lower and transitional flow regimes as flow velocity ***,our findings further the understanding of dynamic changes in flow resistance in the channel-bar landscapes of large river systems and have important implications for riverine ecology and flood management.

关键词： flow resistance channel-bar landscape interaction region large river bedform

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Morphology mediation of MoS_(2) nanosheets with organic cations for fast sodium ion storage

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Chinese Chemical Letters 2021年第2期32卷 880-884页

作者： Jinjin Li congcong liu Jingjiang Wei Yuantao Yan Xiaoli Zhao Xiaowei Yang School of Materials Science and Engineering Tongji University.Shanghai 201804China

Ion diffusion kinetics,depending on the size,tortuosity,connectivity of the channels,greatly affects the rate performance of the ***-dimensional materials(2DMs) has emerged as promising electrode materials in the past *** r,the applications of 2DMs electrodes are limited by the strong restacking problem,which leads to a poor rate *** this work,we for the first time mediated the mo rphology of molybdenum disulfide(MoS_(2)) nanosheets via a facile coagulation method;abundant sheet crumples were induced,which greatly enhance their surface accessibility and thus benefit the ion diffusion ***,the crumpled-MoS_(2) electrodes follow a capacitive Na-ion charge-storage mechanism to a large ***,we demonstrate the special role of organic cations in the inter-sheet assembly configuration,in sharp contrast with that of alkali/alkaline-earth *** propose that organic cations cause edge/face contact of the sheets,instead of the face/face contact,thus affording a house-of-cards structure.

关键词： Ion diffusion kinetics Crumpled MoS_(2)nanosheets Anti-restacking Organic cations Na-ion storage

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Effects of injection of anti-corticotropin release hormone serum in the lateral ventricles and electroacupuncture analgesia on pain threshold in rats with adjuvant arthritis

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Neural Regeneration Research 2012年第21期7卷 1630-1636页

作者： Yunying Qiao Fudong Wu Jian Wang Xiaolu Cui congcong liu Xinlong Zhu Department of Acupuncture and Moxibustion Shanxi College of Traditional Chinese Medicine Taiyuan 030024 Shanxi Province China Institute of Acupuncture and Moxibustion Shandong University of Traditional Chinese Medicine Jinan 250014 Shandong Province China

Rat models of adjuvant arthritis were established, and anti-corticotropin release hormone serum injection in the lateral ventricles and electroacupuncture at right Jiaji （EX-B2） were performed. The pain threshold was decreased at 45 and 60 minutes after injection of the anti-corticotropin release hormone serum. Electroacupuncture at Jiaji can resist this effect. Immunohistochemical staining results showed that the expression of corticotropin release hormone in the hypothalamic paraventdcular nucleus was greater in the electroacupuncture ＋ anti-corticotropin release hormone serum group compared with the anti-corticotropin release hormone serum group. The expression of corticotropin release hormone was correlated with the pain threshold. The effect of endogenous corticotropin release hormone in pain modulation can be obstructed by anti-corticotropin release hormone serum. The analgesia of electroacupuncture can partially resist the depressed pain threshold caused by injection of anti-corticotropin release hormone serum. The analgesic effect of electroacupuncture is associated with the corticotropin release hormone content in the hypothalamus.

关键词： endogenous corticotropin release hormone electroacupuncture adjuvant arthritis analgesia hypothalamus neuron neural regeneration

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Proton-induced fast preparation of size-controllable MoS2 nanocatalyst towards highly efficient water electrolysis

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Chinese Chemical Letters 2021年第3期32卷 1191-1196页

作者： JingJiang Wei Ge Wang Yijie Zhang Shengping Wang Wanyu Zhao Qihang liu congcong liu Xiaoli Zhao Xiaowei Yang School of Materials Science and Engineering Tongji UniversityShanghai 201804China

MoS2 has emerged for catalyzing the hydrogen evolution *** notable strategies have been developed to downsize the MoS2 particles and expose more active ***,the restacking issue,which reduces the exposure degree,has rarely been taken into ***,we report on a facile proton-induced fast hydrothermal approach to produce size-controllable MoS2 nanocatalysts and demonstrate that along the varying of sheet sizes,there is a trade-off between the intrinsic catalytic activity(mainly determined by the unsaturated sulfur on the sheet edges)and the active edge accessibility(influenced by the assembly structure).The size-optimized catalyst delivers a high performance of a low overpotential of~200 mV at 10 mA/cm^(2),a Tafel slope of 46.3 mV/dec,and a stable working state,which is comparable to the recent notable *** findings will provide a pathway for its large-scale application and enhance the water electrolysis performance.

关键词： Size-controllable nanocatalys Proton inducement MoS2 nanocatalyst Hydrogen evolution reaction Electrode-level performance

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Flow resistance adjustments of channel and bars in the middle reaches of the Yangtze River in response to the operation of the Three Gorges Dam

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Journal of Geographical Sciences 2022年第10期32卷 2013-2035页

作者： HU Yong DENG Jinyun LI Yitian liu congcong HE Zican State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China CCCC Second Harbour Engineering Co Ltd Wuhan 430040China

Since the Three Gorges Dam(TGD)was put into operation,the flood water level at an identical discharge rate has not displayed a decreasing trend along the middle reaches of the Yangtze River(MYR).The flow resistance variations of the channel and bars in response to the operation of the TGD remain poorly understood,despite the importance of understanding these for water disaster mitigation and water environment ***,the impacts of the TGD on the downstream flow resistance of the channel and bars in the MYR were analyzed using systematic surveys of hydrological datasets,cross-sectional profiles,sediment datasets,and remote sensing images,during different *** the actual natural conditions in the MYR,a modified semi-empirical formula,which considered the grain,dune resistance,as well as the topographic features of the riverbed,was proposed to predict the channel ***,the effect of various dam-control flow and sediment elements on the variation in different flow resistance components,and the corresponding relationships among them were *** showed a decline in the comprehensive,channel,and bar resistances as the discharge increased,whereas there was a slight increase when reaching the bank-full ***,the bar resistance occupied 65%,while the channel resistance,in which dune resistance was much larger than grain resistance,contributed 35%to the comprehensive *** addition,while flow resistance rose over time,there was a decline as the distance from the TGD *** conclusion,the increased dune and bar resistances,interpreted by the fluctuated channel longitudinal profile and growing vegetated area on bars,were the dominant factors preventing the flood water level from dropping.

关键词： flow resistance water level channel geomorphology bar Three Gorges Dam Middle Yangtze River

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Engineering two-dimensional pores in freestanding TiO_2/graphene gel film for high performance lithium ion battery

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Journal of Energy Chemistry 2018年第1期27卷 176-182页

作者： Xiaojun Yan Yuanyuan Wang congcong liu Min Guo Jingying Tao Jing Cao Dongju Fu Liyi Dai Xiaowei Yang College of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200241China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Research Institute of Tsinghua University in Shenzhen Shenzhen 518057GuangclongChina

As the key component of electrochemical energy storage devices, an electrode with superior ions transport pores is the important premise for high electrochemical performance. In this paper, we developed a unique solution process to prepare freestanding TiO_2/graphene hydrogel electrode with tunable density and porous structures. By incorporating room temperature ionic liquids（RTILs）, even upon drying, the non-volatile RTILs that remained in the gel film would preserve the efficient ion transport channels and prevent the electrode from closely stacking, to develop dense yet porous structures. As a result, the dense TiO_2/graphene gel film as an electrode for lithium ion battery displayed a good gravimetric electrochemical performance and more importantly a high volumetric performance.

关键词： TiO2/graphene gel electrode Pore engineering Ions transport channels Lithium ion battery Volumetric performance

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