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Journal of Ocean University of china 2024年第4期23卷 1035-1044页

作者： zhu Ying YANg Xinsheng LI Zhengjie LI chao School of Marine Science and Engineering Qingdao Agricultural UniversityQingdao 266109China

As a member of mucins family,MUc2 is an important component of mucus,which is characterized by tandem and irregular repeat sequences rich in threonine and *** is strongly expressed by goblet cells that are involved in innate *** flounder is an economically important marine *** this study,two homologous genes of MUc2 were identified,named MUc2-1 and *** on phylogenetic and structural analysis,MUc2-1 and MUc2-2 were clustered in two clades,*** olivaceus MUc2-1 showed a closer relationship with MUc2 in the higher *** healthy tissues were analyzed to determine the expression patterns,and both MUc2 genes showed high expression levels in the gills and *** Edwardsiella tarda challenge,*** MUc2-1 and MUc2-2 both showed significant up-regulated expression in intestine and ***,MUc2-1 was significantly up-regulated in gill cell lines following PgN and polyI:c stimulation,and MUc2-2 was significantly up-regulated in gill cell lines following LPS *** addition,ISH results revealed that MUc2-1 and MUc2-2 showed the same tissue localization in intestine tissues,but displayed different localization in *** siRNA-mediated knockdown of MUc2-1 and MUc2-2 genes in the gill cell lines of Japanese flounder affected the expressions of galnt family genes and smad pathway members that are related to mucosal *** results provided a valuable insight into understanding the functions of MUc2 on mucosal immune system in response to the invasion of bacterial pathogen.

关键词： MUc2 ISH Edwardsiella tarda Paralichthys olivaceus

On the Difference Between the Skew-rank of an Oriented graph and the Rank of Its Underlying graph

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Acta Mathematicae Applicatae Sinica 2024年第1期40卷 129-136页

作者： Jia-min zhu Bo-jun Yuan Yi Wang School of Mathematical Sciences Anhui UniversityHefei230601China School of Science Zhejiang University of Science and TechnologyHangzhou310023China

Let g be a simple graph and g~σ be the oriented graph with g as its underlying graph and orientation σ.The rank of the adjacency matrix of g is called the rank of g and is denoted by r(g).The rank of the skew-adjacency matrix of g~σ is called the skew-rank of g~σ and is denoted by sr(g~σ).Let V(g)be the vertex set and E(g) be the edge set of *** cyclomatic number of g,denoted by c(g),is equal to |E(g)|-|V(g)|+ω(g),where ω(g) is the number of the components of *** is proved for any oriented graph g~σ that-2c(g)≤sr(g~σ)-r(g)≤2c(g).In this paper,we prove that there is no oriented graph g~σwith sr(g~σ)-r(g)=2c(g)-1,and in addition,there are infinitely many oriented graphs g~σ with connected underlying graphs such that c(g)=k and sr(g~σ)-r(g)=2c(g)-l for every integers k,l satisfying 0 ≤l≤4k and l≠1.

关键词： cyclomatic number rank skew-rank

Small-sized Ni-co/Mo_(2)c/co_(6)Mo_(6)c_(2)@c for efficient alkaline and acidic hydrogen evolution reaction by an anchoring calcination strategy

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Frontiers of chemical Science and Engineering 2024年第5期18卷 95-103页

作者： Jianxia gu Ying zhu Haiyan Zheng chunyi Sun Zhongmin Su Department of chemistry Xinzhou Normal UniversityXinzhou 034000China School of chemistry Northeast Normal UniversityChangchun 130024China

A novel,cheap and highly efficient Ni-co/Mo_(2)c/co_(6)Mo_(6)c_(2)@c nanocomposite has been successfully constructed through simple one-step carbonization method in a nitrogen *** in the precursor can effectively anchor molybdenum-based Keggin-type polyoxometallate and Nico-layered double hydroxide through electrostatic and coordination interactions,which avoids the aggregation of catalyst particles during the pyrolysis *** optimization,the obtained Ni-co/Mo_(2)c/co_(6)Mo_(6)c_(2)@c possesses small size(3-8 nm),large specific surface area and hierarchical pore *** importantly,Ni-co/Mo_(2)c/co_(6)Mo_(6)c_(2)@c presents remarkable hydrogen evolution reaction activity with low overpotentials in 0.5 mol·L^(-1)H_(2)SO_(4)(102.3 mV)and 1 mol·L^(-1)KOH(95 mV)to afford the current density of 10 mA·cm^(-2),as well as small Tafel slopes of 82.49 and 99.92 mV·dec^(-1),***,this catalyst also shows outstanding stability for 12 h without a significant change in current *** excellent catalytic performance of Ni-co/Mo_(2)c/co_(6)Mo_(6)c_(2)@c can put down to the synergistic effect between multiple components and the small size of the *** work provides unique insights into the preparation of efficient transition metal-based catalysts for HER.

关键词： polyoxometallates layered double hydroxide transition metal-based electrocatalysts hydrogen evolution reaction

Solvent-free carbon sphere nanofluids towards intelligent lubrication regulation

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Friction 2024年第1期12卷 95-109页

作者： Sheng ZHANg Wen LI Xiaoliang MA Xiaoqiang FAN Minhao zhu Tribology Research Institute School of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031China Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China

By simply switching the electrical circuit installed on steel/steel contact,the tribological behaviors of nanofluids(NFs)can be regulated in real time,thereby achieving the desired performance of friction reduction and wear ***,solvent-free carbon spherical nanofluids(c-NFs)were successfully prepared for intelligent lubrication regulation.c-NFs with excellent lubrication performance can immediately reduce the coefficient of friction(cOF)despite applying a weak electric potential(1.5 V).Moreover,polyethylene glycol 400(PEg400)containing 5.0 wt%c-NFs remained responsive to electrical stimulation under the intermittent voltage application with an average coefficient of friction(AcOF)reduction of 20.8%over *** intelligent lubrication regulation of c-NFs under an external electric field(EEF)mainly depends on the orderly arranged double-electric adsorption film of ion canopy-adsorbed carbon spheres(cSs).The intermittent electrical application can continuously reinforce the adsorption film and its durability for real-time controlling the sliding ***-stimulation-responsive intelligent lubricants provide a new technical support for realizing intelligent stepless control of devices.

关键词： solvent-free carbon spherical nanofluids(c-NFs) intelligent lubrication regulation lubrication performance adsorption film

A DFT study on Pt single atom loaded cOF for efficient photocatalytic cO_(2)reduction

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Journal of Materials Science & Technology 2024年第3期170卷 87-94页

作者： Fei Xie chuanbiao Bie Jian Sun Zhenyi Zhang Bicheng zhu Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of GeosciencesWuhan430078China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs commission Key Laboratory of Photosensitive Materials and Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Minzu UniversityDalian116600China

Photocatalytic cO_(2)reduction provides a promising strategy for the alleviation of greenhouse effect and energy shortage *** single atom modification is an effective method to improve the cO_(2)reduction performance of covalent organic framework(cOF)photocatalysts,while the intrinsic mechanism is not revealed in ***,a Pt-cOF photocatalytic system was constructed by embedding Pt single atom in TFPT-TMT-cOF(TFPT:1,3,5-tris(4-formylphenyl)-triazine,TMT:2,4,6-trimethyl-1,3,5-triazine).Based on density functional theory(DFT)calculation,the geometric structure and electronic property of Pt-cOF were investigated,and the cO_(2)adsorption and reduction reaction process on Pt-cOF were *** results show that the Pt atom can be steadily anchored in cOF via the formation of Pt-N and Pt-c ***,there is strong electronic interaction between Pt and *** incorporation of Pt atom benefits the cO_(2)reduction activity of cOF from multiple aspects:(ⅰ)reducing the band gap and improving light absorption;(ⅱ)enhancing cO_(2)adsorption and activating the cO_(2)molecule;(ⅲ)decreasing the energy barrier in the hydrogenation step of cO_(2)→cOOH,thus facilitating cO_(2)conversion to cO;(ⅳ)inhibiting the hydrogenation of cO,thereby increasing the selectivity of *** work brings a novel insight into the excellent cO_(2)reduction performance of Pt modified cOF,and provides useful references for the design of single atom photocatalysts.

关键词： Photocatalysis carbon dioxide reduction covalent organic framework Pt single atom Theoretical calculation

Dissolution behavior of Al_(2)O_(3)inclusions into caO-MgO-SiO_(2)-Al_(2)O_(3)-TiO_(2)system ladle slags

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 977-987页

作者： Zhiyin Deng Xiaomeng Zhang guangyu Hao chunxin Wei Miaoyong zhu Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education) Northeastern UniversityShenyang 110819China School of Metallurgy Northeastern UniversityShenyang 110819China TBEA Shenyang Transformer group co. Ltd.Shenyang 110141China Angang Steel co. Ltd.Anshan 114021China

To investigate the dissolution behaviors of Al_(2)O_(3)inclusions in caO-5wt%MgO-SiO_(2)-30wt%Al_(2)O_(3)-TiO_(2)system ladle slags,confocal scanning laser microscopy was conducted on the slags with different TiO_(2)contents(0-10wt%),and scanning electron microscopy was performed to study the interfacial reaction between Al_(2)O_(3)and this slag *** results disclose that the dissolution of Al_(2)O_(3)inclusions does not result in the formation of new phases at the boundary between the slag and the *** TiO_(2)-bearing and TiO_(2)-free ladle slags,there is no difference in the dissolution mechanism of Al_(2)O_(3)inclusions at steelmaking *** layer diffusion is found as the controlling step of the dissolution of Al_(2)O_(3),and the diffusion coefficient is in the range of 4.18×10^(-10)to 2.18×10^(-9)m^(2)/s at 1450-1500℃.compared with the solubility of Al_(2)O_(3)in the slags,slag viscosity and temperature play a more profound role in the dissolution of Al_(2)O_(3)inclusions.A lower viscosity and a lower melting point of the slags are beneficial for the *** addition of TiO_(2)(e.g.,5wt%)in ladle slags can enhance the dissolution of Al_(2)O_(3)inclusions because of the low viscosity and melting point of the slags,while excessive addition of TiO_(2)(e.g.,10wt%)shows the opposite trend.

关键词： inclusions dissolution ladle refining slag titanium dioxide confocal scanning laser microscopy

Ultrahigh performance passive radiative cooling by hybrid polar dielectric metasurface thermal emitters

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Opto-Electronic Advances 2024年第4期7卷 17-25页

作者： Yinan Zhang Yinggang chen Tong Wang Qian zhu Min gu Institute of Photonic chips University of Shanghai for Science and TechnologyShanghai 200093China centre for Artificial-Intelligence Nanophotonics School of Optical-Electrical and Computer EngineeringUniversity of Shanghai for Science and TechnologyShanghai 200093China

Real-world passive radiative cooling requires highly emissive,selective,and omnidirectional thermal emitters to maintain the radiative cooler at a certain temperature below the ambient temperature while maximizing the net cooling *** various selective thermal emitters have been demonstrated,it is still challenging to achieve these conditions sim-ultaneously because of the extreme difficulty in controlling thermal emission of photonic structures in *** we demonstrated hybrid polar dielectric metasurface thermal emitters with machine learning inverse design,en-abling a high emissivity of~0.92 within the atmospheric transparency window 8-13μm,a large spectral selectivity of~1.8 and a wide emission angle up to 80 degrees,*** selective and omnidirectional thermal emitter has led to a new record of temperature reduction as large as~15.4°c under strong solar irradiation of~800 W/m2,signific-antly surpassing the state-of-the-art *** designed structures also show great potential in tackling the urban heat island effect,with modelling results suggesting a large energy saving and deployment area *** research will make significant impact on passive radiative cooling,thermal energy photonics and tackling global climate change.

关键词： radiative cooling dielectric metasurfaces machine learning thermal emitters

Polymer: Non-fullerene acceptor heterojunction-based phototransistor for short-wave infrared photodetection

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Nano Research 2024年第4期17卷 3087-3095页

作者： Jing Li Weigang zhu Yang Han Yanhou geng Wenping Hu Key Laboratory of Organic Integrated circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Science&Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072China Key Laboratory of Organic Integrated circuits of Ministry of Education&Key Laboratory of Molecular Optoelectronic Sciences School of Materials Science and EngineeringTianjin UniversityTianjin 300072China

It remains full of challenge for extending short-wave infrared(SWIR)spectral response and weak-light detection in the context of broad spectral responses for *** this work,a novel poly(2,5-bis(4-hexyldodecyl)-2,5-dihydro-3,6-di-2-thienyl-pyrrolo[3,4-c]pyrrole-1,4-dione-alt-thiophene)(PDPPT3-HDO):cOTIc-4F organic bulk-heterojunction is prepared as active layer for bulk heterojunction ***3-HDO serves as a hole transport material,while cOTIc-4F enhances the absorption of SWIR light to 1020 *** a result,smooth and connected PDPPT3-HDO film is fabricated by blade coating method and exhibits high hole mobility up to 2.34 cm^(2)·V^(-1)·s^(-1) with a current on/off ratio of 4.72×10^(5) in organic thin film ***3-HDO:cOTIc-4F heterojunction phototransistors exhibit high responsivity of 2680 A·W^(-1) to 900 nm and 815 A·W^(-1) to 1020 nm,with fast response time(rise time~20 ms and fall time~100 ms).The photosensitivity of the heterojunction phototransistor improves as the mass ratio of non-fullerene acceptors increases,resulting in an approximately two orders of magnitude enhancement compared to the bare polymer ***,the phototransistor exhibits decent responsivity even under ultra-weak light power of 43μW·cm^(-2) to 1020 *** work represents a highly effective and general strategy for fabricating efficient and sensitive SWIR light photodetectors.

关键词： photodetection phototransistor organic semiconductor heterojunction non-fullerene acceptor

Pollution characteristics and source apportionment of heavy metal(loid)s in soil and groundwater of a retired industrial park

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Journal of Environmental Sciences 2024年第9期143卷 23-34页

作者： Zijing Xiang Shijin Wu Lizhong zhu Kun Yang Daohui Lin Zhejiang Provincial Key Laboratory of Organic Pollution Process and control Department of Environmental SciencesZhejiang UniversityHangzhou 310058China Zhejiang Ecological civilization Academy Anji 313300China

Heavy metal(loid)s(HMs)pollution has become a common and complex problem in industrial parks due to rapid industrialization and ***,soil and groundwater were sampled from a retired industrial park to investigate the pollution characteristics of *** show that Ni,Pb,cr,Zn,cd,and cu were the typical HMs in the *** analysis with the positive matrix factorization model indicates that HMs in the topsoil stemmed from industrial activities,traffic emission,and natural source,and the groundwater HMs originated from industrial activities,groundwater-soil interaction,groundwater-rock interaction,and atmosphere *** sequential extraction of soil HMs reveals that As and Hg were mainly distributed in the residue fraction,while Ni,Pb,cr,Zn,cd,and cu mainly existed in the mobile *** HMs either in the total concentration or in the bioavailable fraction preferred to retain in soil as indicated by their high soil-water partitioning coefficients(K_(d)),and the K_(d) values were correlated with soil pH,groundwater redox potential,and dissolved *** relative stable soil-groundwater circumstance and the low active fraction contents limited the vertical migration of soil HMs and their release to *** findings increase our knowledge about HMs pollution characteristics of traditional industrial parks and provide a protocol for HMs pollution scrutinizing in large zones.

关键词： Heavy metal(loid)s Industrial park Source apportionment chemical fraction Soil-groundwater partitioning

Effects of content and particle size of TiH2 powders on the energy output rules of RDX composite explosives

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Defence Technology（防务技术） 2024年第2期32卷 297-308页

作者： Hao Wang Yangfan cheng Shoujun zhu Zihan Li Zhaowu Shen School of chemical Engineering Anhui University of Science and TechnologyHuainan 232001China Anhui Engineering Laboratory of Explosive Materials and Technology Anhui University of Science and TechnologyHuainan 232001China School of Engineering Science University of Science and Technology of ChinaHefei 230027China

In order to improve the detonation characteristics of RDX,a RDX-based composite explosive with TiH_(2)powders was *** effects of content and particle size of TiH_(2)powders on thermal safety,shock wave parameters and thermal damage effects of RDX-based composite explosive were studied with the c80 microcalorimeter,air blast experiment system and colorimetric thermometry *** results showed that TiH_(2)powders could enhance the thermal stability of RDX-based composite explosive and increase its ultimate decomposition *** content and particle size of TiH_(2)powders also had significant effects on the thermal safety,detonation velocity,shock wave parameters,fireball temperature and duration of RDX-based composite ***,the differences of TiH_(2)and Ti powders on the detonation energy output rules of RDX-based composite explosives were also compared,showing that TiH_(2)powders had better influences on improving the explosion power and thermal damage effect of RDX-based composite explosives than Ti powders,for the participation of free H_(2)released by TiH_(2)powders in the detonation ***_(2)powders have important research values as a novel energetic additive in the field of military composite explosives.

关键词： RDX Hydrogen storage alloy Air blast After-burn reaction colorimetric thermometry