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Adsorption of congo red on mesoporous activated carbon prepared by CO2 physical activation

Chinese Journal of Chemical Engineering 2020年第4期28卷 1069-1076页

作者： Mingjie Ma Huijuan Ying Fangfang Cao Qining Wang ning ai College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Zhejiang Province Key Laboratory of Biomass Fuel Hangzhou 310014China Biodiesel Laboratory of China Petroleum and Chemical Industry Federation Hangzhou 310014China National Chemical and Chemical Engineer Experiment Teaching Center National Chemical and Chemical Engineer Simulation Experiment Teaching CenterZhejiang University of TechnologyHangzhou 310014China

This research demonstrates the production of mesoporous activated carbon from sargassum fusiforme via physical activation with carbon *** composite design was applied to conduct the experiments at different levels by altering three operating *** temperature(766-934℃),CO2 flow rate(0.8-2.8 L·min^-1)and activation time(5-55 min)were the variables examined in this *** effect of parameters on the specific surface area,total pore volume and burn-out rate of activated carbon was studied,and the influential parameters of methylene blue adsorption value were identified employing analysis of *** optimum conditions for maximum methylene blue adsorption value were:activation temperature=900℃,activation time=29.05 min and CO2 flow rate=1.8 L·min(-1).The activated carbon produced under optimum conditions was characterized by BET,FTIR and *** adsorption behavior on congo red was *** effect of parameters on the adsorbent dosage,temperature,PH and initial congo red concentration was *** adsorption properties of the activated carbon were investigated by *** equilibrium removal rate and maximum adsorption capacity reaches up to 94.72%,234 mg·g^-1,respectively when initial congo red concentration is 200 mg·L^-1 under adsorbent dosage(0.8 g·L^-1),temperature(30℃),PH7.

关键词： Sargassum fusiforme Mesoporous activated carbon Congo red Response surface method Kinetics

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Spatial-temporal variations in near-surface soil freeze-thaw cycles in the source region of the Yellow River during the period 2002–2011 based on the Advanced Microwave Scanning Radiometer for the Earth Observing System(AMSR-E) data

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Journal of Arid Land 2017年第6期9卷 850-864页

作者： WANG Rui ZHU Qingke MA Hao ai ning School of Soil and Water Conservation Beijing Forestry University Northwest Institute of Forest Inventory and Planning and Design State Forestry Administration College of Life Science Yan'an University

Detecting near-surface soil freeze-thaw cycles in high-altitude cold regions is important for understanding the Earth＇s surface system, but such studies are rare. In this study, we detected the spatial-temporal variations in near-surface soil freeze-thaw cycles in the source region of the Yellow River（SRYR） during the period 2002–2011 based on data from the Advanced Microwave Scanning Radiometer for the Earth Observing System（AMSR-E）. Moreover, the trends of onset dates and durations of the soil freeze-thaw cycles under different stages were also analyzed. Results showed that the thresholds of daytime and nighttime brightness temperatures of the freeze-thaw algorithm for the SRYR were 257.59 and 261.28 K, respectively. At the spatial scale, the daily frozen surface（DFS） area and the daily surface freeze-thaw cycle surface（DFTS） area decreased by 0.08% and 0.25%, respectively, and the daily thawed surface（DTS） area increased by 0.36%. At the temporal scale, the dates of the onset of thawing and complete thawing advanced by 3.10（±1.4） and 2.46（±1.4） days, respectively; and the dates of the onset of freezing and complete freezing were delayed by 0.9（±1.4） and 1.6（±1.1） days, respectively. The duration of thawing increased by 0.72（±0.21） day/a and the duration of freezing decreased by 0.52（±0.26） day/a. In conclusion, increases in the annual minimum temperature and winter air temperature are the main factors for the advanced thawing and delayed freezing and for the increase in the duration of thawing and the decrease in the duration of freezing in the SRYR.

关键词： Advanced Microwave Scanning Radiometer for the Earth Observing System air temperature near-surface soil freeze-thaw cycles source region of the Yellow River

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Cyclopeptidic Constituents from Arenaria oreophila J.D,Hooker(Caryophyllaceae)

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Journal of Integrative Plant Biology 2006年第6期48卷 740-744页

作者： ai-Qun Jia ning-Hua Tan Jun Zhou State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of Botany the Chinese Academy of Sciences Kunming 650204 Yunnan China

To further investigate the cyclopeptldes of the Caryophyllaceae family, two new cyclopeptldes, named Arenarlphilin E （compound 1） and Arenariphilin F （compound 2）, were obtained from Arenaria oreophUe J. D. Hooker using some Isolation methods, e. g. normal and reverse silica gel. By detailed spectroscopic analysis, such as FAB^＋-MS, 1 D NMR, 2D NMR, the structures of Arenariphilin E （compound 1） and Arenariphilln F （compound 2） were determined as cyclo（lle^1-Gly-Val^1-Ala-Leu-lle^3-lle^2-Val^2-Pro） and cyclo（Pro^2-Pro^1-Gly^2-lle-Val-Leu-Gly^1-aiaThr- Gly^3）, respectively.

关键词： Arenaria oreophila Arenariphilin E Arenariphilin F Caryophyllaceae Cyclopeptide.

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New Minor Cyclopeptides from Arenaria oreophila (Caryophyllaceae)

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Chinese Chemical Letters 2006年第4期17卷 477-480页

作者： ai Qun JIA ning Hua TAN Jun ZHOU State Key Laboratory of Phytochemistry and Plant Resources in West China Kuning Institute of Botany Graduate School of the Chinese Academy of Sciences Chinese Academy of Sciences Kunming 650204

New minor cyclic peptides, named arenariphilin C 1 and arenariphilin D 2, were isolated from the whole plants of Arenaria oreophila （Caryophyllaceae）. Their structures were determined as cyclo（Pro^1-Pro2-Leu^1-Leu2-Phe-Ser-Gly-Thr） and cyclo （Ser-Cys） on the basis of spectroscopic data, especially by two-dimension NMR （2D NMR） technologies.

关键词： Arenaria oreophila Caryophyllaceae cyclopeptide arenariphilin C arenariphilin D.

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New process development and process evaluation for capturing CO2 in flue gas from power plants using ionic liquid[emim][Tf2N]

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Chinese Journal of Chemical Engineering 2020年第3期28卷 721-732页

作者： Lan Li Xiaoting Huang Quanda Jiang Luyue Xia Jiawei Wang ning ai College of Chemical Engineering Zhejiang University of TechnologyHangzhou 310014China Zhejiang Province Key Laboratory of Biomass Fuel Hangzhou 310014China Biodiesel Laboratory of China Petroleum and Chemical Industry Federation Hangzhou 310014China Zhejiang Supcon Software Co. LtdHangzhou 310014China School of Engineering&Applied Science Aston UniversityBirmingham B47ETW MidlandsEnglandUK

Using the ionic liquid[emim][Tf2N]as a physical solvent,it was found by Aspen Plus simulation that it was possible to attempt to capture CO2 from the flue gas discharged from the coal-fired unit of the power *** the combination of model calculation and experimental determination,the density,isostatic heat capacity,viscosity,vapor pressure,thermal conductivity,surface tension and solubility of[emim][Tf2N]were *** on the NRTL model,the Henry coefficient and NRTL binary interaction parameters of CO2 dissolved in[emim][Tf2N]were obtained by correlating[emim][Tf2N]with the gas–liquid equilibrium data of ***,the calculated relevant data is imported into Aspen Plus,and the whole process model of the ionic liquid absorption process is *** the absorption process is optimized according to the temperature distribution in the absorption tower to obtain a new absorption ***,the density,constant pressure heat capacity,surface tension,thermal conductivity,and viscosity of[emim][Tf2N]were changed to investigate the effect of ionic liquid properties on process energy consumption,solvent circulation and heat exchanger *** results showed that based on the composition of the inlet gas stream to the absorbers,CO2 with a capture rate of 90%and a mass purity higher than 99.5%was *** results indicate that the[emim][Tf2N]could be used as a physical solvent for CO2 capture from coal-fired *** addition,the results will provide a theoretical basis for the design of new ionic liquids for CO2 capture.

关键词： Ionic liquids CO2 capture Aspen Plus process simulation New green physical solvents Flue gas

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SW-Net: A novel few-shot learning approach for disease subtype prediction

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BIOCELL 2023年第3期47卷 569-579页

作者： YUHAN JI YONG LIANG ZIYI YANG ning ai Faculty of Innovation Engineering School of Computer Science and EngineeringMacao University of Science and TechnologyMacao999078China Tencent Quantum Lab Shenzhen518000China

Few-shot learning is becoming more and more popular in many fields,especially in the computer vision *** inspires us to introduce few-shot learning to the genomic field,which faces a typical few-shot problem because some tasks only have a limited number of samples with *** goal of this study was to investigate the few-shot disease sub-type prediction problem and identify patient subgroups through training on small *** disease subtype classification allows clinicians to efficiently deliver investigations and interventions in clinical *** propose the SW-Net,which simulates the clinical process of extracting the shared knowledge from a range of interrelated tasks and generalizes it to unseen *** model is built upon a simple baseline,and we modified it for genomic *** initialization for the classifier and transductive fine-tuning techniques were applied in our model to improve prediction accuracy,and an Entropy regularization term on the query set was appended to reduce ***,to address the high dimension and high noise issue,we future extended a feature selection module to adaptively select important features and a sample weighting module to prioritize high-confidence *** on simulated data and The Cancer Genome Atlas meta-dataset show that our new baseline model gets higher prediction accuracy compared to other competing algorithms.

关键词： Few-shot learning Disease sub-type classification Feature selection Deep learning Meta-learning

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Porous carbon/Fe composites from waste fabric for high-efficiency electromagnetic wave absorption

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Journal of Materials Science & Technology 2022年第31期126卷 266-274页

作者： Jin-Bo Cheng Hai-Bo Zhao ai-ning Zhang Yan-Qin Wang Yu-Zhong Wang Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) State Key Laboratory of Polymer Materials EngineeringNational Engineering Laboratory for Eco-Friendly Polymer Materials(Sichuan)College of ChemistrySichuan UniversityChengdu 610064China

Nowadays,a large amount of waste fabrics has brought huge environmental and resource problems,while the traditional recycling routes are downcycling with low efficiency and complex separation ***,we demonstrate a green and facile route to up-recycle waste fabrics(cotton-polyester blending or cotton fabrics)into a high-performance microwave *** this design,an assistant coating was deposited onto the fiber surface of the waste fabric through the assembly of tannic acid-Fe^(2+)(TA-Fe^(2+)),which effectively catalyzed the polymer fiber into highly graphitized porous carbon fiber at high ***,the Fe nanoparticles from the reduction of Fe^(2+)ions were evenly embedded on the surface of porous carbon ***,the resultant porous carbon/Fe composites with hierarchi-cal microstructures displayed excellent microwave absorption ***,the microwave ab-sorber from waste polyester-cotton blended fabric could reach a minimum reflection loss(RL)of-50.5 dB at a thin coating thickness of 1.7 mm,and the minimum RL from waste cotton fabric absorber reached-47.1 dB at a thickness of 2.5 *** work provides a new idea to convert waste fabrics into high value-added microwave absorbing materials in a simple and environmentally friendly way,which will help reuse resources and protect the environment.

关键词： Up recycling Microwave absorption Waste fabrics Thin thickness

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Impacts of land disturbance and restoration on runoff production and sediment yield in the Chinese Loess Plateau

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Journal of Arid Land 2017年第1期9卷 76-86页

作者： ai ning WEI Tianxing ZHU Qingke QIANG Fangfang MA Huan QIN Wei School of Soil and Water Conservation Beijing Forestry UniversityBeijing 100083China College of Life Science Yan'an UniversityYan'an 716000China China Institute of Water Resources and Hydropower Research Beijing 100048China International Research and Training Center on Erosion and Sedimentation Beijing 100048China

Land disturbance and land restoration are important factors influencing runoff production and sediment yield in the semi-arid loess regions of China. This study compared the runoff production and sediment yield during the early stage after land disturbance（ESLD） with those during restoring stage after land disturbance（RSLD）. Grey relational analysis was used to analyse the importance of each one of the influencing factors（vegetation, rainfall, soil and topography） in affecting the runoff production and sediment yield. Our results showed that during ESLD, topography was the most critical factor controlling the runoff production, while soil was the most important factor controlling the sediment yield. During RSLD, vegetation was more important in affecting runoff production, while rainfall was more important in affecting sediment yield. In additional, this study demonstrated that both the runoff production and the sediment yield can be effectively reduced by restoring vegetation on severely-disturbed lands, thus providing an important theoretical basis for better implementations of the Grain for Green Program. Our results revealed that the vegetation types of Hippophae rhamnoides＋Pinus tabulaeformis and H. rhamnoides are better plant selections for land restoration in this area, especially for relatively gentle slopes（i.e., less than 20 degrees）.

关键词： land disturbance/ restoration grey relational analysis runoff sediment yield Loess Plateau

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Integration of zircon and apatite U–Pb geochronology and geochemical mapping of the Wude basalts(Emeishan large igneous province):A tool for a better understanding of the tectonothermal and geodynamic evolution of the Emeishan LIP

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Geoscience Frontiers 2021年第2期12卷 573-585页

作者： Jia-Nan Fu Franco Pirajno Fan Yang Espine Shivute Yi-Zhan Sun ning ai Kun-Feng Qiu School of Earth Sciences and Resources China University of GeosciencesBeijing100083China The University of Western Australia 35 Stirling HwyCrawleyWA6009Australia Institute of Geophysical and Geochemical Exploration CAGSLangfang065000China Geological Survey of ningxia YinchuanNingxia750021China

Radiogenic isotopic dating and Lu–Hf isotopic composition using laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)of the Wude basalt in Yunnan province from the Emeishan large igneous province(ELIP)yielded timing of formation and post-eruption tectonothermal *** lithogeochemistry and elements mapping of basaltic rocks were further reevaluated to provide insights into crustal contamination and formation of the ELIP.A zircon U–Pb age of 251.3±2.0 Ma of the Wude basalt recorded the youngest volcanic eruption event and was consistent with the age span of 251-263 Ma for the emplacement of the *** zircons hadε_(Hf)(t)values ranging from7.3 to+2.2,identical to those of magmatic zircons from the intrusive rocks of the ELIP,suggesting that crust-mantle interaction occurred during magmatic emplacement,or crust-mantle mixing existed in the deep source region prior to deep *** apatite U–Pb age at 53.6±3.4 Ma recorded an early Eocene magmatic superimposition of a regional tectonothermal event,corresponding to the Indian–Eurasian plate *** Nb,Ta,Ti and P anomalies of the Emeishan basalt may reflect crustal *** uneven Nb/La and Th/Ta values distribution throughout the ELIP supported a mantle plume model ***,the ELIP was formed as a result of a mantle plume which was later superimposed by a regional tectonothermal event attributed to the Indian–Eurasian plate collision during early Eocene.

关键词： Emeishan basalt Zircon and apatite Geochronology Lu-Hf isotope Early Eocene superposition Indian-Eurasian plate collision

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Phytohormone dynamics in developing endosperm influence rice grain shape and quality

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Journal of Integrative Plant Biology 2020年第10期62卷 1625-1637页

作者： Xiao-Fan Zhang Jian-Hua Tong ai-ning Bai Chun-Ming Liu Lang-Tao Xiao Hong-Wei Xue School of Life Science and Technology Shanghai Tech UniversityShanghai 201210China Hunan Provincial Key Laboratory of Phytohormones and Growth Development Hunan Agricultural UniversityChangsha 410128China Key Laboratory of Plant Molecular Physiology Institute of Botanythe Chinese Academy of SciencesBeijing 100093China Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China Joint Center for Single Cell Biology/School of Agriculture and Biology Shanghai Jiao Tong UniversityShanghai 200240China National Key Laboratory of Plant Molecular Genetics CAS Center for Excellence in Molecular Plant SciencesShanghai Institute of Plant Physiology and Ecologythe Chinese Academy of SciencesShanghai 200032China

Hormones are important signaling molecules regulating developmental processes and responses to environmental stimuli in higher *** endosperm,the portion of the seed surrounding the embryo,is the main determinant of rice grain shape and yield;how-ever,the dynamics and exact functions of phyto-hormones in developing endosperm remain *** a systemic study including transcriptome analysis,hormone measurement,and transgene-based endosperm-specific expression of phytohormone bio-synthetic enzymes,we demonstrated that dynamic phytohormone levels play crucial roles in the developing rice endosperm,particularly in regard to grain shape and *** detected diverse,differential,and dra-matically changing expression patterns of genes related to hormone biosynthesis and signaling during endosperm development,especially at early devel-opmental *** chromatography measure-ments confirmed the dynamic accumulation of hor-mones in developing *** transgenic analysis performed on plants expressing hormone bio-synthesis genes driven by an endosperm-specific pro-moter revealed differential effects of the hormones,especially auxin and brassinosteroids,in regulating grain shape and *** studies help elucidate the dis-tinct roles of hormones in developing endosperm and provide novel and useful tools for influencing crop seed shape and yield.

关键词： fir grain shape

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