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Rare Metals 2024年第5期43卷 2093-2102页

作者： Bo Peng Zi-Hao Zhou Ping Xuan Jie Xu Lian-Bo Ma School of Materials Science and Engineering Anhui University ofTechnologyMa'anshan 243002China Anhui product quality supervision&inspection research institute Hefei 230051China

Mn-based layered oxides are among the most promising cathode materials for sodium-ion batteries owing to the advantages of abundance,environmenta friendliness,low cost and high specific capacity.P2 and O'3 are two representative structures of Mn-based layered ***,the P2 structure containing insufficien Na generally exhibits low initial charge capacity,while O'3structure with sufficient Na delivers high initial charge capacity but poor cycle *** study prepared a multitude of Na_(x)MnO_(2)(x=0.7,0.8,0.9)cathode materials with varying P2/O'3 ratios and further investigated their electrochemical *** optimized Na_(0.8)MnO_(2) comprising 69.9 wt%O'3 and 30.1 wt%P2 phase,exhibited relatively balanced specific capacity,Coulombic efficiency and cycle ***,it achieved a high specific capacity of 128.9 mAh·g^(-1) with an initia Coulombic efficiency of 98.2%in half-cell configuration The Na_(0.8)MnO_(2)//hard carbon full cell also achieved a high specific capacity of 126.7 mAh·g^(-1) with an initia Coulombic efficiency of 98.9%.Moreover,the capacity fading mechanism was revealed by combining in-situ and ex-situ X-ray *** findings of this study provide theoretical guidance for further modification design of Mnbased layered cathodes.

关键词： Sodium-ion batteries Cathode materials Mn-based layered oxides P2/0'3 composites

Interaction Between Ustilaginoidea virens and Rice and Its Sustainable Control

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Rice science 2024年第3期31卷 269-284页

作者： ZHANG Fengmin CAO Zhenzhen ZHENG Xin HE Yuntao CHEN Mingxue LIN Xiaoyan Rice product quality inspection&supervision Testing Center of Ministry of Agriculture and Rural Affairs China National Rice Research InstituteHangzhou 310006China

Ustilaginoidea virens is a common rice pathogen that can easily lead to a decline in rice quality and the production of toxins pose potential risks to human *** this review,we present a comprehensive literature review of research since the discovery of rice false *** provide a comprehensive and,at times,critical overview of the main results and findings from related research,and propose future research ***,we delve into the interaction between *** and rice,including the regulation of transcription factors,the process of *** infecting rice panicles,and the plant immune response caused by rice *** that,we discuss the identification and characterization of mycotoxins produced by the pathogenic fungus,as well as strategies for disease *** emphasize the importance of comprehensive agricultural prevention and control methods for the sustainable management of *** knowledge will update our understanding of the interaction between *** and rice plants,offering a valuable perspective for those interested in ***.

关键词： rice false smut flower-specific infection mycotoxin food safety plant disease

Unconventional Fluorescent and Multi-responsive Polyethyleneimine with LCST and UCST Behavior:Synthesis,Characterization and Biological Applications

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Chinese Journal of Polymer Science 2024年第6期42卷 826-837页

作者： Feng-Ming Yin Li-Li Wu Shu-Sheng Li Xiao-Na Pan Xiao-Li Zhu Xu-Bao Jiang Xiang Zheng Kong College of Chemistry and Chemical Engineering University of JinanJinan250022China shandong institute for product quality inspection Jinan250102China College of Chemical Engineering Tianjin UniversityTianjin300072China

Non-aromatic fluorescent and multi-responsive materials,exhibiting inherent fluorescence emission and controlled phase change,have garnered significant attention in recent ***,the underlying interaction between their fluorescent properties and phase transition remains *** this study,we synthesized a series of catalyst-free aza-Michael addition-based polyethyleneimine(RFPEI)materials by reacting polyethyleneimine(PEI)with N-isopropyl acrylamide(NIPAM).The resulting RFPEI was comprehensively characterized,and demonstrated dual-phase transition behavior(LCST and UCST)in water,which could be finely tuned by adjusting its composition or external factors such as ***,upon UV irradiation(365 nm),RFPEI exhibited strong fluorescence *** further investigated the effects of NIPAM grafting percentage to PEI,polymer concentration,and pH on the LCST/UCST and fluorescent properties of RFPEI aqueous ***,we showcased the great potential of RFPEI as a versatile tool for physiological cell imaging,trace detection,and controlled release of *** study presents a novel class of stimuli-responsive fluorescent materials with promising applications in the field of biomedicine.

关键词： Polyethyleneimine Multi-responsiveness Intrinsic fluorescence emission Cell imaging Controlled drug release

Colorimetric Detection of Acid Phosphatase and Malathion Using NiCo_(2)O_(4)Nanosheets as Peroxidase-Mimicking Activity

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Journal of Analysis and Testing 2024年第2期8卷 170-179页

作者： Jia Chen Zerong Long Yan Li Hongdeng Qiu Xinjiang Uygur Autonomous product quality supervision and inspection institute Urumqi830000China CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China

The establishment of a low-cost and facile approach for the assay of acid phosphatase(ACP)and its inhibitor is a research *** this paper,we successfully synthesized NiCo_(2)O_(4)nanosheets with peroxidase-mimicking activity in alkaline deep eutectic solvents(DESs)composed of NaOH and PEG-200,which can catalyze 3,3',5,5'-tetramethylbenzidine(TMB)to the oxidation state TMB(ox-TMB)in the presence of *** to L-ascorbic acid-2-phosphate can be hydrolyzed into ascorbic acid by ACP,the peroxidase-like activity of NiCo_(2)O_(4)nanosheets is ***,the addition of malathion,an inhibitor of ACP,can inhibit the activity of ACP and thus limit the production of ascorbic acid(AA).Therefore,a colorimetric approach can be established for highly sensitive and selective detection of ACP and malathion with detection limits of 0.032 U/L and 0.65 nmol/L,*** importantly,this method can be successfully applied to malathion detection in environmental samples tap water and food cucumber juice,indicating that it has potential application prospects in environmental and agricultural fields.

关键词： NiCo_(2)O_(4)nanosheets Acid phosphatase Malathion Peroxidase-mimicking activity Colorimetric

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中国电动机质量监管及标准体系概述

China Standardization 2024年第4期128卷 69-73页

作者：王鑫辛勇孙玉泉丛林 shandong institute for product quality inspection

This paper systematically analyzes the product quality supervision methods in China,introduces the main functions of market regulation departments and the product supervision and random inspection process,and introduces the channels for feedback on consumers’quality and safety problems,the online platform for consumer problem *** also summarizes the main standards categories and standards systems for electric motors in China,and the standards and key inspection items for supervision and random inspection.

关键词： electric motor quality supervision supervision and random inspection standards

同方期刊数据库博看期刊评论

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质量管理体系与标准体系的协调与转化

China Standardization 2024年第1期125卷 60-62页

作者：王丹杨磊王淑芳王雪方雷曹楠张帅东钟威任常菲 Changchun Standards research institute Jilin Provincial institute of Standards Jilin Provincial Administration of Market Regulation Jilin institute of product quality supervision and inspection

This paper elaborates on the differences and connections between the quality management system and standards system,as well as the principles and sequence of establishing the quality management system and standards *** provides suggestions on how to establish and integrate another system in the existing system and coordinate with it.

关键词： quality management system standards system

Synthesis of comb bipolymers and their pour point depressing properties

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Petroleum Science 2014年第1期11卷 155-160页

作者： Zhang Changqiao Gao Congcong Gao Fengfeng Wang Jian Zhang Dawei Wang Yan Xu Dawei School of Chemistry and Chemical Engineering Shandong University shandong quality Certification Centre shandong product quality supervision & inspection research institute

A bipolymer maleic anhydride-methyl acrylate （MAMA） was synthesized from maleic anhydride and methyl acrylate based on molecular *** further reacted with oleylamine or octadecyl alcohol to generate two comb polymers called Oleamide-MAMA （NMAMA） and OctadecanolMAMA （OMAMA）,*** structure of both the polymers was confirmed by their infrared spectral analysis （IR）,gel permeation chromatography analysis （GPC） and differential scanning calorimeter （DSC）.Moreover,the pour point depressing （PPD） properties of these comb polymers were examined *** results showed that besides the molecular weight and concentration of the polymers,the length of side chains and the number of functional groups also had great influence on the pour point depressing *** π bonds and hydrogen bonds between depressants were the key factors for improving the pour point depressing *** results suggest that both OMAMA and NMAMA are potential pour point depressants for industry.

关键词： Maleic anhydride comb polymers pour point depressant hydrogen bonds molecular simulation

Radical cascade cyclization for the green and simple synthesis of silylated indolo[2,1-a]isoquinoline derivatives via visible light-mediated Si–H bonds activation

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Chinese Chemical Letters 2024年第1期35卷 243-249页

作者： Zhenkai Lei Fei Xue Bin Wang Shijie Wang Yu Xia Yonghong Zhang Weiwei Jin Chenjiang Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Oil and Gas Fine ChemicalsMinistry of Education&Xinjiang Uygur Autonomous RegionUrumqi Key Laboratory of Green Catalysis and Synthesis TechnologyCollege of ChemistryXinjiang UniversityUrumqi 830017China College of Future Technology Institute of Materia Medic1Xinjiang UniversityUrumqi 830017China Xinjiang Uygur Autonomous Region product quality supervision and inspection institute Urumqi 830011China

Photocatalytic and photoinduced silyl radicals cascade cyclization procedures for the green and simple preparation of fused tetracyclic skeleton silylated indolo[2,1-a]isoquinoline-6(5H)-ones from 2-aryl-N-acryloyl indoles with hydrosilanes are *** photocatalytic reaction is carried out with 9,10-dicyanoanthracene(DCA)as an organophotocatalyst and 3-acetoxyquinuclidine as hydrogen atom transfer(HAT)catalyst at room temperature under metal-and oxidant-free *** keys to the success of photoredox-catalytic conversion include(1)the reductive quenching of DCA^(*)[E_(1/2)(*P/P^(-))=+1.97 V *** in MeCN]by 3-acetoxyquinuclidine(E_(p)=+1.22 V *** in MeCN),and(2)the thermodynamic feasibility of hydrogen atom abstraction from hydridic Si-H bond by electrophilic N^(+·).Particularly,the simple photoinduced cascade cyclization using(TMS)3SiH with 2-aryl-N-acryloyl indoles was exploited via an electron-donor-acceptor(EDA)complex under visible light irradiation.

关键词： Indolo[2,1-a]isoquinolines Silyl radicals Green photocatalytic Simple photoinduced Silylated Hydrogen atom transfer EDA complex

Preparation of microencapsulatedα-olefin drag reducing polymer used in oil pipeline transportation

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Petroleum Science 2011年第1期8卷 99-107页

作者： Li Bing Xing Wenguo Dong Guilin Chen Xiangjun Zhou Ningning Qin Zhanbo Zhang Changqiao School of Chemistry and Chemical Engineering Shandong UniversityShandong 250061China Linyi institute of product quality supervision and inspection Shandong 276004China shandong institute of Metrology Shandong 250014China shandong quality Certification Centre Shandong 250014China

Microcapsules containing oil drag-reducing polymer particles were prepared by melting-scattering and condensing of polyethylene wax,in-situ polymerization of urea and formaldehyde,and interfacial polymerization of styrene *** related processes were studied by a molecular dynamics simulation method,and molecular design of microcapsule isolation agent was carried out on the basis of the *** technologies for preparing microencapsulated oil drag-reducing polymer particles were compared and the circulation drag reducing efficiency of the microencapsulated polymer particles was evaluated based on the characterization results and their dissolution *** design of a microcapsule isolation agent suggests that a-olefin polymer particles can be stably dispersed in water by using long-chain alkyl sodium salt surfactant which can prevent the agglomeration ofα-olefin polymer *** results of simulation of the adsorption process shows that the amount of alkyl sodium salt surfactant can directly affect the stability of microencapsulatedα-olefin polymer particles, and there must be a minimum critical amount of *** characterization of the morphology by Scanning Electron Microscopy（SEM） and comparison of the static pressure stability,especially the conditions of reaction and technological control of microcapsules with different shell materials,microencapsulation of a-olefin polymer particles with poly-（urea-formaldehyde） as shell material was selected as the optimum scheme,because it can react under mild conditions and its technological process can be controlled in a large *** relationship of drag reducing rate and dissolving time of microcapsules showed that the formation of microcapsules did not affect the maximum drag reducing rate,and the drag reducing rate of each sample can reach about 35%along with the dissolving time,*** did not affect the drag reducing property ofα-olefin polymer.

关键词： α-olefin polymer molecular design coating material microcapsule preparation stability and solubility drag reducing property

Rheological properties of wormlike micelles formed in the sodium oleate/trisodium phosphate aqueous solution

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Chinese Chemical Letters 2008年第4期19卷 483-487页

作者： Yong Qiang Ji Wei Shan Wang Gan Zuo Li Li Qiang Zheng Key Laboratory of Colloid and Interface Chemistry Shandong UniversityMinistry of EducationJinan 250100China shandong institute of supervision ＆ inspection on product quality Jinan 250100China

Aqueous solution of anionic surfactant,sodium oleate（NaOA）,was studied by means of steady-state shear rheology and dynamic oscillatory *** system of NaOA/Na3PO4 showed high viscosity,strong viscoelasticity and good ability of countering Ca^2＋,Mg^2＋.The Maxwell model and Cole-Cole plot were applied to study the dynamic viscoelasticity of wormlike *** microstructures of the wormlike micelles were characterized by FF-TEM.

关键词： Wormlike micelles Rheology Sodium oleate Trisodium phosphate