检索结果-南通市图书馆

Aqueous-phase formation of N-containing secondary organic compounds affected by the ionic strength

Journal of environmental Sciences 2024年第4期138卷 88-101页

作者： Yuqi Gan Xiaohui Lu Shaodong Chen Xinghua Jiang Shanye Yang Xiewen Ma Mei Li Fan Yang Yewen Shi Xiaofei Wang Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Shanghai Institute of Pollution Control and Ecological security Shanghai 200092China guangdong provincial Observation and research Station for Coastal Atmosphere and Climate of the Great Bay Area Southern University of Science and TechnologyShenzhen 518055China Institute of Mass Spectrometry and Atmospheric environment Guangdong Provincial Engineering Research Center for On-line Source Apportionment System of Air PollutionJinan UniversityGuangzhouChina environmental Monitoring Station of Pudong New District Shanghai 201200China Shanghai Municipal center for Disease Control&Prevention Shanghai 200336China

The reaction of carbonyl-to-imine/hemiaminal conversion in the atmospheric aqueous phase is a critical pathway to produce the light-absorbing N-containing secondary organic compounds(SOC).The formation mechanism of these compounds has been wildly investigated in bulk solutions with a low ionic ***,the ionic strength in the aqueous phase of the polluted atmosphere may be *** is still unclear whether and to what extent the inorganic ions can affect the SOC *** we prepared the bulk solution with certain ionic strength,in which glyoxal and ammonium were mixed to mimic the aqueous-phase *** characterization by High-resolution Mass Spectrometry was performed to identify the N-containing products,and the light absorption of the mixtures was measured by ultraviolet-visible ***-nine N-containing compounds were identified and divided into four categories(N-heterocyclic chromophores,high-molecular-weight compounds with N-heterocycle,aliphatic imines/hemiaminals,and the unclassified).It was observed that the longer reaction time and higher ionic strength led to the formation of more N-heterocyclic chromophores and the increasing of the lightabsorbance of the *** added inorganic ions were proposed to make the aqueous phase somewhat viscous so that the molecules were prone to undergo consecutive and intramolecular reactions to form the *** general,this study revealed that the enhanced ionic strength and prolonged reaction time had the promotion effect on the lightabsorbing SOC *** implies that the aldehyde-derived aqueous-phase SOC would contribute more light-absorbing particulate matter in the industrial or populated area where inorganic ions are abundant.

关键词： Ionic strength Carbonyl-to-imine/hemiaminal Heterocyclic Brown carbon Mass spectrometry Aqueous-phase reaction

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unveiling the tailorable electrochemical properties of zeolitic imidazolate framework-derived Ni-doped LiCoO_(2) for lithium-ion batteries in half/full cells

引用

Journal of Energy Chemistry 2024年第6期93卷 229-242,I0006页

作者： Jian-En Zhou Yiqing Liu Zhijian Peng Quanyi Ye Hua Zhong Xiaoming Lin Ronghua Zeng Yongbo Wu Jiaye Ye guangdong provincial International Joint research center for Energy Storage Materials Key Laboratory of Theoretical Chemistry of EnvironmentMinistry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina School of Chemistry and Physics Faculty of ScienceQueensland University of TechnologyBrisbaneQLD 4001Australia Key Laboratory of Atomic and Subatomic Structure and Quantum Control(Ministry of Education) Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of MatterSchool of PhysicsSouth China Normal UniversityGuangzhou 510006GuangdongChina guangdong provincial Key Laboratory of Quantum engineering and Quantum Materials Guangdong-Hong Kong Joint Laboratory of Quantum MatterSouth China Normal UniversityGuangzhou 510006GuangdongChina

As a prevailing cathode material of lithium-ion batteries(LIBs),LiCoO_(2)(LCO)still encounters the tricky problems of structural collapse,whose morphological engineering and cation doping are crucial for surmounting the mechanical strains and alleviating phase degradation upon ***,we propose a strategy using a zeolitic imidazolate framework(ZIF)as the self-sacrificing template to directionally prepare a series of LiNi_(0.1)Co_(0.9)O_(2)(LNCO)with tailorable electrochemical *** rational selection of sintering temperature imparts the superiority of the resultant products in lithium storage,during which the sample prepared at 700℃(LNCO-700)outperforms its counterparts in cyclability(156.8 mA h g^(-1)at 1 C for 200 cycles in half cells,1 C=275 mA g^(-1))and rate capability due to the expedited ion/electron transport and the strengthen mechanical *** feasibility of proper Ni doping is also divulged by half/full cell tests and theoretical study,during which LNCO-700(167 mA h g^(-1)at 1 C for 100 cycles in full cells)surpasses LCO-700 in battery performance due to the mitigated phase deterioration,stabilized layered structu re,ameliorated electro nic co nductivity,a nd exalted lithium sto rage *** work systematically unveils tailorable electrochemical behaviors of LNCO to better direct their practical application.

关键词： Lithium-ion batteries Zeolitic imidazolate framework LiNi_(0.1)Co_(0.9)O_(2) Electrochemical properties

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Purification of copper foils driven by single crystallization

引用

Chinese Physics B 2024年第2期33卷 506-511页

作者：寇金宗赵孟泽李兴光何梦林杨方友刘科海成庆秋任云龙刘灿付莹吴慕鸿刘开辉王恩哥 Songshan Lake Materials Laboratory Dongguan 523808China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China guangdong provincial Key Laboratory of Quantum engineering and Quantum Materials School of PhysicsSouth China Normal UniversityGuangzhou 510006China guangdong–Hong Kong Joint Laboratory of Quantum Matter Frontier Research Institute for PhysicsSouth China Normal UniversityGuangzhou 510006China State Key Laboratory for Mesoscopic Physics Frontiers Science Center for Nano-optoelectronicsSchool of PhysicsPeking UniversityBeijing 100871China Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education) Department of PhysicsRenmin University of ChinaBeijing 100872China International center for Quantum Materials Collaborative Innovation Center of Quantum MatterPeking UniversityBeijing 100871China School of Physics Liaoning UniversityShenyang 110036China

High-purity copper(Cu) with excellent thermal and electrical conductivity, is crucial in modern technological applications, including heat exchangers, integrated circuits, and superconducting magnets. The current purification process is mainly based on the zone/electrolytic refining or anion exchange, however, which excessively relies on specific integrated equipment with ultra-high vacuum or chemical solution environment, and is also bothered by external contaminants and energy consumption. Here we report a simple approach to purify the Cu foils from 99.9%(3N) to 99.99%(4N) by a temperature-gradient thermal annealing technique, accompanied by the kinetic evolution of single crystallization of *** success of purification mainly relies on(i) the segregation of elements with low effective distribution coefficient driven by grain-boundary movements and(ii) the high-temperature evaporation of elements with high saturated vapor *** purified Cu foils display higher flexibility(elongation of 70%) and electrical conductivity(104% IACS) than that of the original commercial rolled Cu foils(elongation of 10%, electrical conductivity of ~ 100% IACS). Our results provide an effective strategy to optimize the as-produced metal medium, and therefore will facilitate the potential applications of Cu foils in precision electronic products and high-frequency printed circuit boards.

关键词： purification copper foil thermal annealing technique single crystallization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effects of frozen storage on texture,chemical quality indices and sensory properties of crisp Nile tilapia fillets

引用

Aquaculture and Fisheries 2023年第6期8卷 626-633页

作者： Xi Xie Xiaoqian Zhai Meiyan Chen Qingqing Li Yao Huang Lijuan Zhao Qin Wang Li Lin College of Light Industry and Food Zhongkai University of Agriculture and EngineeringGuangzhou510225China guangdong provincial water environment and aquatic products security engineering technology research center Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl BreedingCollege of Animal Science TechnologyZhongkai University of Agriculture and EngineeringGuangzhou510225China

Crisp Nile tilapia(Oreochromis niloticus)is a kind of valuable fish product with high muscle firmness and crispiness ***,with the change of physicochemical in crisp Nile tilapia,the frozen storage parameters and quality would be different comparing to normal Nile ***,the aim of this study was to analyze the changes in texture,chemical quality indices and volatile compounds of Nile tilapia fillets during frozen *** remaining storage time of the crisp Nile tilapia fillets could be estimated within 120 *** frozen storage,fillets resulted in softer started at 90-day,and 36.75%,45.74%,48.81%and 20.37%reduction of hardness,springiness,gumminess and chewiness were observed at *** acid reactive substances(TBARS)for frozen samples showed similar with fresh fillets within 60 days,while the TBARS was 1.97 folds higher than fresh one at ***-field nuclear magnetic resonance(LF-NMR)indicated that the water loss of Nile tilapia fillets was significant changed at 120-day,which reduced more than 12.5%water out of *** volatile compound analysis showed that more free fatty acid will be detected at 120-day comparing to the fresh *** combined results demonstrated that the crisp Nile tilapia fillets had the best quality before 60 days frozen storage then loss of some quality properties in longer ***,these results identified the ideal storage strategy for the preservation of crisp Nile tilapia without affecting sensory appeal and commercial value.

关键词： Crisp Nile tilapia Frozen storage Texture Quality Shelf life

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Effects of dissolved oxygen on intestinal bacterial community and immunity of Atlantic salmon Salmo salar

引用

Journal of Oceanology and Limnology 2023年第1期41卷 364-375页

作者： Shihong XU Yanfeng WANG Caixia GAO Sarath BABU V Jun LI Qinghua LIU Zhizhong XIAO Yingxuan XU Chunyan ZHAO Li LIN Liang CHI Department of aquatic Animal Medicine College of FisheriesHuazhong Agricultural UniversityWuhan 430070China College of Veterinary Medicine Qingdao Agricultural UniversityQingdao 266109China Laboratory Animal and Comparative Medicine Team State Key Laboratory of Veterinary BiotechnologyHarbin Veterinary Research InstituteChinese Academy of Agricultural Sciences(CAAS)Harbin 150069China CAS Key Laboratory of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China guangdong provincial water environment and aquatic products security engineering technology research center Guangzhou Key Laboratory of Aquatic Animal Diseases and Waterfowl BreedingZhongkai University of Agriculture and EngineeringGuangzhou 510225China University College London London WC1E 6BTUnited Kingdom School of Marine Science and engineering Qingdao Agricultural UniversityQingdao 266109China

Dissolved oxygen(DO)is one of most important factors which affect wide range physiologic features of including immune responses and intestinal bacterial ***,the underlying mechanisms remain *** address this question,the intestinal bacterial community compositions and the immune features of Atlantic salmon(Salmo salar)grown in recirculating aquaculture systems(RAS)were *** were reared under different DO saturation levels,e.g.,200% saturation named high group(H),100%saturation named control group(CK),and 60%saturation named lower group(L).Large variations in the operational taxonomic units(OTUs)frequency distribution for the intestinal bacterial community of Atlantic salmon were *** intestinal bacterial community of all groups was dominated mainly by three phyla,e.g.,***,and ***,Acinetobacter baumannii,an opportunistic pathogen of salmon was increased significantly in L *** further monitored the immunity features of fish under different DO *** results show that leucocyte number,cortisol level,the expressions of interleukin-1β(IL-1β),Toll-like receptor 4(TLR4),and nucleotide-binding oligomerization domain like protein 2(NOD2)were higher at significant levels in the L group than those in the other two ***4 and NOD2 are usually related with the bacterial infections;therefore,it is reasonable to believe that the stronger immune responses observed in the L group might be related with the higher abundance of *** in the inte stine of Atlantic ***,these findings demonstrated that low DO level may induce stronger immunity responses in Atlantic salmon.

关键词： Atlantic salmon dissolved oxygen(DO) immune responses microbiota intestine

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A stable and efficient La-doped MIL-53(Al)/ZnO photocatalyst for sulfamethazine degradation

引用

Journal of Rare Earths 2022年第4期40卷 595-604,I0004页

作者： Qiuming Wei Wei Li Chun Jin Yasi Chen Linlin Hou Zhiliang Wu Zhongliang Pan Qinyu He Yinzhen Wang Dingyuan Tang guangdong provincial Key Laboratory of Quantum engineering and Quantum Materials School of Physics and Telecommunication EngineeringSouth China Normal UniversityGuangzhou 510006China guangdong engineering technology research center of Efficient Green Energy and environmental Protection Materials Guangzhou 510006China School of Electrical and Electronic engineering Nanyang Technological University639798Singapore

Photocatalytic technology can solve various environmental pollution problems,especially antibiotic pollution.A novel La-doped MIL-53(Al)/ZnO composite material was successfully synthesized by a combination of hydrothermal method and calcination,showing high photocatalytic degradation percent of sulfamethazine(SMT).The 2 mol%La MIL-53(Al)/ZnO photocatalyst shows the highest degradation efficiency toward SMT(92%)within 120 min,which is 4.1 times higher than pure ZnO(increased from 18%to 92%).In addition,the degradation analysis of SMT by high performance liquid chromatography proves that the products are CO_(2) and H_(2)*** improved photocatalytic activity is mostly caused by the following factors.(1)Doping La ions can decrease the band gap of ZnO,enhance light response,and effectively enhance the separation rate of photo-generated holes and electrons.(2)MIL-53(Al)can adsorb SMT and promote the separation of *** work shows that the synthesized La-doped MIL-53(Al)/ZnO photocatalyst is expected to be used as a green and effective method for treatment of environment water pollution.

关键词： Sulfamethazine Photocatalytic degradation Zinc oxide Lanthanum doping Rare earths

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Monodispersed Co@C nanoparticles anchored on reclaimed carbon black toward high-performance electromagnetic wave absorption

引用

Journal of Materials Science & technology 2022年第29期124卷 182-192页

作者： Zhenjiang Li Hui Lin Yuxin Xie Laibin Zhao Yuying Guo Tingting Cheng Hailong Ling Alan Meng Shaoxiang Li Meng Zhang College of Materials Science and engineering College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266061China State Key Laboratory Base of Eco-chemical engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Shandong engineering research center for Marine environment Corrosion and Safety Protection Shandong Engineering Technology Research Center for Advanced CoatingCollege of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China

Recently,developing carbon-based hybrid materials loaded with magnetic components has been generally regarded as a promising and practically feasible strategy when it comes to constructing lightweight electromagnetic wave *** the current work,reclaimed carbon black(CB)nanopowder was firstly produced by simple burning of wheat straw,which was then employed as sustainable carbon-based host materials(carrier)and successfully decorated Co@C nanoparticles via a simple thermal reduction ***,both the as-fabricated nanocomposites and corresponding electromagnetic wave absorption performances could be effectively tuned by tailoring the dosage of the Co@C *** minimum reflection loss(RLmin)of–53.989 d B was achieved for CB/Co@C-2#at 2.28 mm thickness,meanwhile,CB/Co@C-3#was featured by a wide effective absorption band(EAB)of 6 GHz(6.72–12.72 GHz)at a 2.73 mm matching thickness,which covered the entire X band,suggesting that the CB/Co@C nanocomposites were an attractive candidate for electromagnetic wave *** to the synergistic influence of dielectric loss and magnetic loss from CB and Co@C,respectively,as well as the properly matched impedance,a reasonable electromagnetic wave attenuation mechanism was *** is noteworthy that the preparation process of CB is a facile,recycled,and low-cost strategy for achieving nanoscale carbon-based absorbing materials,moreover,the CB/Co@C nanocomposites provide a reference for constructing lightweight dielectric-magnetic products with superb electromagnetic wave absorption performances.

关键词： Reclaimed carbon black Microwave absorption Attenuation mechanism Preparation technique CB/Co@C nanocomposites

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Self-feedback LSTM regression model for real-time particle source apportionment

引用

Journal of environmental Sciences 2022年第4期34卷 10-20页

作者： Wei Wang Weiman Xu Shuai Deng Yimeng Chai Ruoyu Ma Guoliang Shi Bo Xu Mei Li Yue Li Trusted AI System Laboratory College of Computer ScienceNankai UniversityTianjin 300350China KLMDASR Tianjin Key Laboratory of Network and Data Security TechnologyTianjin 300350China State environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and EngineeringNankai UniversityTianjin 300071China Institute of Mass Spectrometry and Atmospheric environment Guangdong Provincial Engineering Research Center for on-line source apportionment system of air pollution Jinan UniversityGuangzhou 510632China guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for environmental Quality Guangzhou 510632China

Atmospheric particulate matter pollution has attracted much wider attention *** recent years,the development of atmospheric particle collection techniques has put forwards new demands on the real-time source apportionments *** demands are summarized,in this paper,as how to set up new restraints in apportionment and how to develop a non-linear regression model to process complicated circumstances,such as the existence of secondary source and similar *** this study,we firstly analyze the possible and potential restraints in single particle source apportionment,then propose a novel three-step self-feedback long short-term memory(SF-LSTM)network for approximating the source *** proposed deep learning neural network includes three modules,as generation,scoring and refining,and regeneration *** from the scoring modules,SF-LSTM implants four loss functions representing four restraints to be followed in the apportionment,meanwhile,the regeneration module calculates the source contribution in a non-linear *** results show that the model outperforms the conventional regression methods in the overall performance of the four evaluation indicators(residual sum of squares,stability,sparsity,negativity)for the ***,in short time-resolution analyzing,SF-LSTM provides better results under the restraint of stability.

关键词： Time series Regression Self-feedback LSTM network Particle source apportionment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Enhanced debromination of 2,2’,4,4’-tetrabromodiphenyl ether(BDE-47)by zero-valent zinc with ascorbic acid

引用

Frontiers of environmental Science & engineering 2020年第3期14卷 127-139页

作者： Chaojin Jiang Xiaoqian Jiang Lixun Zhang Yuntao Guan guangdong provincial engineering technology research center for Urban water Cycle and water environment Safety Tsinghua Shenzhen International Graduate SchoolShenzhen 518055China State environmental Protection Key Laboratory of Microorganism Application and Risk Control School of EnvironmentTsinghua UniversityBeijing 100084China

A new technique of zero-valent zinc coupled with ascorbic acid(ZVZ/AA)was developed and applied to debrominate the 2,2,,4,4,-Tetrabromodiphenyl ether(BDE-47),which achieved high conversion and rapid debromination of BDE-47 to less-or non-toxic *** reaction conditions were optimized by the addition of 100 mg/L Z V Z particles and 3 mmol/L A A at original solution p H=4.00 using the solvent of methanol/H2O(v:v=4:6),which could convert approximately 94%of 5 mg/L BDE-47 into lower-brominated diphenyl ethers within a 90 min at the ZVZ/AA *** high debromination of BDE-47 was mainly attributed to the effect of A A that inhibits the formation of Zn(Ⅱ)(hydr)oxide passivation layers and promotes the corrosion of ZVZ,which leads to increase the reactivity of ***,ion chromatography and gas chromatography mass spectrometry analyses revealed that bromine ion and lower-debromination diphenyl ethers formed during the reduction of ***,based on the generation of the intermediates products,and its concentration changes over time,it was proposed that the dominant pathway for conversion of BDE-47 was sequential debromination and the final products were diphenyl *** results suggested that the ZVZ/AA system has the potential for highly efficient debromination of BDE-47 from wastewater.

关键词： 2,2,,4,4,-tetrabromodiphenyl ether(BDE-47) Ascorbic acid Reductive debromination Zero-valent zinc

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Design and Testing of a Novel Passive Isolator for a Space Optical Payload

引用

Journal of Harbin Institute of technology(New series) 2018年第2期25卷 85-96页

作者： Jianfeng Yang Chuangmian Huang Yuanhang Wang Kai Li The Fifth Electronic Institute of Ministry of Industry and Information technology guangdong Province research center of Electronic Information products Reliability and environment engineering technology guangdong provincial Key Laboratory of Electronic Information products Reliability technology Guangzhou Province Key Laboratory of Electronic Information products Reliability and environment engineering technology

Vibration isolation system(VIS) is usually applied to improve the pointing capability and resolution of a space optical payload. A novel vibration isolator is introduced. The equivalent stiffness model of the isolator is derived by analyzing its static characteristics. A VIS based on the bipod configuration is developed. Its dynamic model is derived and verified using the finite element method and experiments. Because this isolator contains viscoelastic material,which makes the frequency responsive analysis more difficult,an efficiency analysis approach based on the complex stiffness of viscoelastic material is proposed to calculate the transmissibility of the isolator. Finally,a prototype of the vibration isolator is manufactured and experimental studies are carried out. The experimental results show that the analytical results are in good correspondence with the experimental data and the isolator can effectively attenuate the vibrations for the optical payloads.

关键词： isolator viscoelastic material space optical payload

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：