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Simultaneous Feammox and anammox process facilitated by activated carbon as an electron shuttle for autotrophic biological nitrogen removal

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Frontiers of Environmental Science & Engineering 2022年第7期16卷 87-99页

作者： yingbin Hu Ning Li Jin Jiang Yanbin Xu Xiaonan Luo Jie cao Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education Institute of Environmental and Ecological EngineeringGuangdong University of TechnologyGuangzhou510006China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou511458China School of Environmental Science and Engineering Guangdong University of TechnologyGuangzhou510006China

Ferric iron reduction coupled with anaerobic ammonium oxidation(Feammox)is a novel ferric-dependent autotrophic process for biological nitrogen removal(BNR)that has attracted increasing attention due to its low organic carbon ***,extracellular electron transfer limits the nitrogen transformation *** this study,activated carbon(AC)was used as an electron shuttle and added into an integrated autotrophic BNR system consisting of Feammox and anammox *** nitrogen removal performance,nitrogen transformation pathways and microbial communities were investigated during 194 days of *** the stable operational period(days 126–194),the total nitrogen(TN)removal efficiency reached 82.9%±6.8%with a nitrogen removal rate of 0.46±0.04 kg-TN/m^(3)/*** contributions of the Feammox,anammox and heterotrophic denitrification pathways to TN loss accounted for 7.5%,89.5%and 3.0%,*** experiments showed that AC was more effective in accelerating the Feammox rate than the anammox rate.X-ray photoelectron spectroscopy(XPS)analyses showed the presence of ferric iron(Fe(III))and ferrous iron(Fe(II))in secondary minerals.X-ray diffraction(XRD)patterns indicated that secondary iron species were formed on the surface of iron-AC carrier(Fe/AC),and Fe(III)was primarily reduced by ammonium in the Feammox *** phyla Anaerolineaceae(0.542%)and Candidatus Magasanikbacteria(0.147%)might contribute to the Feammox process,and Candidatus Jettenia(2.10%)and Candidatus Brocadia(1.18%)were the dominative anammox phyla in the ***,the addition of AC provided an effective way to enhance the autotrophic BNR process by integrating Feammox and anammox.

关键词： Feammox Anammox Extracellular electron transfer Electron shuttle Activated carbon

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Electroacupuncture alleviates zymosan-induced colorectal hypersensitivity

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Journal of Traditional Chinese Medicine 2022年

作者： LI Si-ting WANG Shao-jun yiN Ye-hui DE Gejing LI Cai-cai WANG Zi-yan cao wen-jie Institute of Acupuncture and Moxibustion， China Academy of Chinese Medical Sciences Institute of Chinese Materia Medica， China Academy of Chinese Medical Sciences

Objective: this study to investigate the mechanism underlying the electroacupuncture (EA) alleviates colorectal hypersensitivity， a feature of irritable bowel syndrome (IBS). Method: The colorectal hypersensitivity model was established by treating mice with zymosan. Electrophysiological techniques， Western blotting and immunofluorescence staining were used to detect the changes of the sensitive state of the colorectum and the response in spinal ganglion and spinal cord after acupuncture intervention. Result: colorectal distension studies revealed that repetitive applied electroacupuncture treatment on mice could significant alleviates colorectal intensity. Western blotting studies with nerve growth factor (NGF) in the colorectum， substance P (SP) in the spinal ganglion， protein kinase C gamma (PKCγ) in the spinal cord， and transient receptor potential vanilloid 1 (TRPV1) showed that electroacupuncture suppressed zymosan-induced expression of TRPV1， NGF and SP in multiple tissues. Immunofluorescence labeling results showed that EA attenuated the expression of NGF in the colorectum， SP in the spinal ganglion， PKCγ in the spinal cord， and TRPV1 in all three tissues in zymosan-treated mice. Moreover， the number of neurons double-positive for TRPV1/IB4 and TRPV1/NF200 was increased in the spinal ganglion. Conclusion: these results provide molecular-level evidence that EA alleviates zymosan-induced colorectal hypersensitivity by altering the expression of pain-associated proteins in the colorectum and spinal cord. EA has a potential to be therapeutic intervention option for IBS treatment.

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Structure induced wide range wettability:Controlled surface of micro-nano/nano structured copper films for enhanced interface

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Journal of Materials Science & Technology 2021年第25期84卷 147-158页

作者： Lili cao Bingwei Luo Hongli Gao Min Miao Tao Wang Yuan Deng Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument &Information Microsystem InstituteBeijing Information Science and Technology UniversityBeijing 100192China Hangzhou Innovation Institute Beihang UniversityHangzhou 310052China Beijing Institute of Aeronautical Materials Aero Engine Corporation of ChinaBeijing 100095China

The wettability of materials used in the production of devices employed in various technological domains have attracted significant ***,it is important to design the surfaces of these materials such that they can provide the required surface free energy and simplify the interfacial ***,various Cu films with a highly controllable surface wettability and a wide range of contact angles ranging from 6°to 152°were fabricated,and the corresponding mechanism was discussed.A wide range of wettability was realized by controlling the surface structure of the Cu *** nanogap structure of the vertical nanowire-array film led to a high surface free ***,the oblique nanowirearray film increased the surface free energy;however,the surface free energy was dependent on the size of the nanowires rather than on the nanogaps owing to the crystallinity of the ***,cluster-nanowire-array films were designed to realize a wettability transition from hydrophilicity to hydrophobicity with a constant surface free *** Cu foam possessed a superhydrophilic surface owing to its high porosity,whereas the cluster-nanoparticle structure possessed a superhydrophobic *** addition,we noted that the structure-induced wettability played an important role in tuning the semiconductor and metal interfacial stress and simplifying the interfacial ***,the outstanding electrical conductivity of the Cu films indicates its promising potential as an *** structure-induced wettability proposed in this study can be applied for a wide range of materials,particularly for films used for advanced applications.

关键词： Wettability Copper Film Micro-nano structure Interface

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Chain-transfer-catalyst: strategy for construction of site-specific functional CO_(2)-based polycarbonates

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Science China Chemistry 2022年第1期65卷 162-169页

作者： Enhao Wang Shunjie Liu Han cao Chunwei Zhuo Xianhong Wang Fosong Wang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China

Site-specific functional polymers are generally synthesized from functionalized chain transfer agents(CTA)in the presence of ***,the poor solubility or chemical inertness of CTAs may make polymerizations ***,this issue is addressed by proposing a strategy of designing chain-transfer-catalyst(CTC)that combines catalyst and CTA into *** occurrence of catalytic effect naturally triggers the chain transfer process to give catalyst-labeled polymers with well-defined *** a proof-of-concept,cobalt(III)porphyrin catalysts with one,two and four hydroxyl groups act as efficient CTCs,giving the corresponding site-specific functional poly(propylene carbonate)s(PPC),diversifying the topology of ***,porphyrin-capped PPCs with controllable Mn in the range of 1,000–16,800 g mol^(-1)were obtained by using monofunctional CTC(CTCOH).Moreover,different from traditional“catalyst+CTA”systems,a novel dynamic network transfer mechanism of CTCOH was *** study provides a CTC strategy for the synthesis of site-specific functional polymers.

关键词： chain-transfer-catalyst metalloporphyrin complex immortal polymerization CO_(2)copolymerization

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Micro-Channel Heat Sink:A Review

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Journal of Thermal Science 2020年第6期29卷 1431-1462页

作者： ZHOU Jinzhi cao Xiaoling ZHANG Nan YUAN Yanping ZHAO Xudong HARDY David School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China School of Computer and Engineering University of HullHull HU67RXUK School of Engineering University of SouthamptonSouthampton SO 171BJUK

The method to cool a high heat flux device is an important research direction for the heat exchanger ***-channels are an eflfective heat exchange structure both for single-phase and two-phase *** this paper,the heat transfer correlations of single-phase,two-phase and nanofluid in a micro-channel are discussed and *** correlations of pressure drop for single-phase and two-phase fluids are also *** the different working fluids used in the micro-channel,the diameter and aspect ratio,shape and structure,surface roughness,internal and external factor and layout of micro-channel pipe are considered to analyze their influence on the heat transfer performance and pressure ***-channel technology applications include industry,air-conditioning,solar energy systems,heat pipe technology and computer data center *** to the conventional heat exchangers used in these fields,a micro-channel heat sink showed a much better heat transfer coefficient and low volume,indicating that it is a good choice and has huge potential for cooling ***,existing problems and future scopes are described,and drawing up design standard,experimental and simulated methods for evaluating its performance are the urgent actions which need to be carried *** review paper serves as guidance for researchers to design and predict the performance of micro-channel heat sinks.

关键词： micro-channel heat transfer pressure drop effect factor application

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Hot Corrosion Behavior of Ti45Al8.5Nb Alloy: Effect of Anodization and Pre-oxidation

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Acta Metallurgica Sinica(English Letters) 2022年第9期35卷 1531-1546页

作者： Hao-Jie Yan Jun-Jie Xia Lian-Kui Wu Fa-He cao School of Materials Shenzhen Campus of Sun Yat-sen UniversityShenzhen518107China College of Materials Science and Engineering Zhejiang University of TechnologyHangzhou310014China

The hot corrosion behavior of Ti45 A18.5 Nb alloy was studied in the salt of Na_(2)SO_(4)and/or NaCl at 700℃.To improve the hot corrosion resistance,Ti45 A18.5 Nb alloy was anodized in fluorine-containing solution and pre-oxidized in *** showed that the combination of anodization and pre-oxidation can efficiently enhance the hot corrosion resistance of Ti45 A18.5 Nb alloy contaminated with Na_(2)SO_(4)or Na_(2)SO_(4)+NaCl *** is because anodization and pre-oxidation result in the formation of compact AlOlayer which can act as a diffusion barrier to prevent sulfur,chlorine,and oxygen from attacking the alloy,therefore providing good resistance against hot *** exposed to NaCl deposit,however,no obvious improvement was achieved on the hot corrosion behavior no matter the alloy was anodized or further pre-oxidized in air.

关键词： Hot corrosion TiAl alloy Anodization Pre-oxidation Halogen effect

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Joining of SiO2 ceramic and TC4 alloy by nanoparticles modified brazing filler metal

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Chinese Journal of Aeronautics 2020年第1期33卷 383-390页

作者： Hong BIAN Yanyu SONG Duo LIU Yuzhen LEI Xiaoguo SONG Jian cao State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Shandong Provincial Key Lab of Special Welding Technology Harbin Institute of Technology at WeihaiWeihai 264209China

Nano-Al2O3 particles modified Ag Cu Ni filler was adopted to braze the SiO2 ceramic and *** effects of filler size as well as the brazing temperature on the interfacial microstructure and mechanical property of the joints were *** filler reduced the phases dimension and promoted the homogeneous distribution of microstructure,obtaining a higher joint strength when compared to microscale *** increase of brazing temperature made the accelerating dissolution and diffusion of Ti,which promoted the increase of thickness of Ti4O7+TiSi2 layer adjacent to SiO2 ceramic and diffusion layer zone nearby TC4 *** hypoeutectic structure was produced in the brazing seam due to the high Ti *** maximum shear strength of^40 MPa was obtained at 950°C for 10 min.

关键词： Brazing Microstructure Nanoparticles modified filler SiO2 ceramic TC4

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Highly stretchable and sensitive strain sensor based on silver nanowires/carbon nanotubes on hair band for human motion detection

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Progress in Natural Science:Materials International 2021年第3期31卷 379-386页

作者： Yanqiang cao Tiancheng Lai Furui Teng Chang Liu Aidong Li National Laboratory of Solid State Microstructures Materials Science and Engineering Department College of Engineering and Applied Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University Institute of Micro-nano Photonic & Beam Steering School of Science Nanjing University of Science and Technology

In this work, a highly stretchable and sensitive strain sensor using silver nanowires(Ag NWs)/multi-walled carbon nanotubes(MWCNTs) on hair band is proposed. The fabrication process of such sensors enabled scalable and facile production with low cost by dipping hair band into Ag NWs/MWCNTs composites suspension. The sensing performance of the sensors was optimized by tuning the Ag NWs/MWCNTs mass ratio. The hair band based strain sensor with Ag NWs/MWCNTs mass ratio of 30 exhibited the best performance with high sensitivity of 416.0 and good stretchability up to 70%. Moreover, great repeatability and long-term stability could be achieved over 7500 cycles of stretch-release. This Ag NWs/MWCNTs-hair band sensor can be used for monitoring human motions and swallowing action.

关键词： Carbon nanotubes Silver nanowires Strain sensor Stretchable electronics Human motion detection

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纵列式直升机悬停飞行品质研究

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航空动力学报 2009年第5期24卷 1055-1060页

作者：李国知曹义华北京航空航天大学航空科学与工程学院北京100191

以适合于飞行品质评价的纵列式直升机非线性飞行动力学模型为基础,根据有人驾驶垂直/短距起落飞机军用品质规范(MIL-F-83300)以及军用旋翼飞行器驾驶品质要求(ADS-33E-PRF),对纵列式直升机悬停开环状态下的飞行品质进行了计算分析.按照... 详细信息

以适合于飞行品质评价的纵列式直升机非线性飞行动力学模型为基础,根据有人驾驶垂直/短距起落飞机军用品质规范(MIL-F-83300)以及军用旋翼飞行器驾驶品质要求(ADS-33E-PRF),对纵列式直升机悬停开环状态下的飞行品质进行了计算分析.按照两种规范的要求,对纵列式直升机的动态响应特性与带宽、操纵特性与姿态敏捷性、轴间耦合以及横向突风扰动影响进行了分析,最后给出了一些有意义的结论.

关键词：飞行品质纵列式直升机动态响应带宽姿态敏捷性轴间耦合

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Phase decomposition behavior and its effects on mechanical properties of TiNbTa0.5ZrAl0.5 refractory high entropy alloy

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Journal of Materials Science & Technology 2021年第7期66卷 10-20页

作者： Yuankui cao Weidong Zhang Bin Liu Yong Liu Meng Du Ao Fu State Key Lab of Powder Metallurgy Central South UniversityChangsha410083China School of Materials Science and Engineering Hunan UniversityChangsha410083China

The mechanical properties of refractory high entropy alloys(RHEAs) strongly depend on their phase structures. In this work, the phase stability of a BCC TiNbTa0.5ZrAl0.5 refractory high entropy alloy subjected to thermomechanical processing was evaluated, and the effects of phase decomposition on room/high temperature mechanical properties were quantitatively studied. It was found that, the thermomechanical processing at 800℃and 1200℃ leads to phase decomposition in the TiNbTa0.5ZrAl0.5 alloy. The phase decomposition is caused by the rapid rising of free energy of the primary BCC phase. The effect of the precipitates on room temperature strength is determined by the competition between the increasing in precipitation strengthening and the decreasing in solid solution strengthening. But at high temperatures(800-1200℃), the phase decomposition causes significant reduction in strength, mainly due to the grain boundary sliding and the decreasing in solid solution strengthening.

关键词： High entropy alloy Thermomechanical processing Precipitation Mechanical property Strengthening mechanism

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