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Dye@MOF composites(RhB@1): Highly sensitive dual emission sensor for the detection of pesticides, Fe^(3+) and ascorbate acid

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中国化学快报:英文版 2023年第10期34卷 121-125页

作者： Lu liu Xiao-li Chen Miao Cai Rui-Kui Yan hua-li cui hua Yang Ji-Jiang Wang School of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Chemical Reaction EngineeringLaboratory of New Energy and New Function MaterialsYan’an UniversityYan’an 716000China

With the rapid development of economy, industrial and agricultural pollutants have caused great damage to the ecological environment and the normal development of organisms, posing a serious threat to global public health. Therefore, rapid and sensitive detection of pollutants is very important for environmental safety and people’s health. A stable multi-response fluorescence sensor(RhB@1) with dual emission characteristics was constructed by embedding Rh B guest molecules in Zn-MOF using a simple one-pot method. XRD, IR, XPS, Raman and other characterization methods were used to demonstrate the formation of composite materials. The sensor has two fluorescence emission peaks at 415 nm and 575nm under the excitation of 316 nm. It has high sensitivity and low detection limit(7.94 and 7.82 nmol/L,respectively) in the detection of fluazinam(FLU) and Fe^(3+). The mechanism of fluorescence quenching may be due to the synergistic effect of IFE and PET. Outstandingly, when ascorbate acid(AA) was added to the quenching system of Fe^(3+) and Rh B@1, its fluorescence gradually recovered, forming the unique“on-off-on” sensor. Therefore, RhB@1 has a fast fluorescence response and good stability, making it potentially useful in practical application and biosensors. More significantly, using Fe^(3+)and AA as chemical input signals, a binary intelligent logic gate device has been developed based on the “on-off-on” response mode of RhB@1, which extends the application of logic gate switching devices in the chemical field. In addition, a visual portable test paper with good selectivity and high sensitivity was developed, which can be used for rapid detection of FLU, showing its broad application prospect.

关键词： Metal-organic framework Rhodamine B Pesticides Fe^(3+) Ascorbate acid Fluorescence sensing

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Subgrain-assisted spontaneous grain refinement in rapid solidification of undercooled melts

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Journal of Materials Science & Technology 2024年第7期174卷 234-248页

作者： Jianbao Zhang Dongpeng hua Dexu cui Xin li Ke hua Yixuan He Haifeng Wang Yuhong Zhao State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsNorthwestern Polytechnical UniversityXi’an 710072China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The grain refinement mechanism for rapid solidification of undercooled melts is still an open problem even after 60 years of on-going *** this work,rapid solidification of undercooled Ni and equi-atomic FeCoNiPd melts was studied and spontaneous grain refinement was found at both low and high *** a detailed electron backscattered diffraction analysis,subgrain-induced grain orien-tation scattering and splitting were found to occur along with the transition from coarse dendrites to fine equiaxed grains at low and high undercooling,respectively,indicating that subgrains play an im-portant role during the formation of fine equiaxed *** this basis,a compromise mechanism of subgrain-assisted spontaneous grain refinement was *** the dendrite re-melting induced thermo-mechanical process and fluid flow induced dendrite deformation occur simultaneously during the post-recalescence stage,stress accumulation would be maximum at both low and high undercooling,thus inducing dynamic recrystallization,during which the formation and rotation of subgrains make the grain orientations scattering and even ***,the grain/subgrain size of undercooled FeCoNiPd ascribing to its unique co-segregation behavior keeps almost invariable from low to high undercooling,indicating that the co-segregation strategy would be effective to inhibit grain growth after rapid solidifi-cation and would be useful in practice.

关键词： Rapid solidification Undercooling Spontaneous grain refinement Grain growth High entropy alloy

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Coordinated voltage regulation strategy of OLTC and BESS considering switching delay

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High Technology Letters 2024年第2期30卷 138-145页

作者：徐振宇 hua Yongzhu cui Jiadong li Chuangwei College of Information Science&Technology Zhejiang Shuren UniversityHangzhou 310015P.R.China The College of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018P.R.China

When large-scale distributed renewable energy power generation systems are connected to the power grid,the risk of grid voltage fluctuations and exceeding the limit increases ***,the on-load tap changer(OLTC)can adjust the transformer winding tap to maintain the secondary side voltage within the normal ***,the inevitable delay in switching transformer taps makes it difficult to respond quickly to voltage ***,switching the transformer taps frequently will decrease the service life of *** order to solve this critical issue,a cooperative voltage regulation strategy applied between the battery energy storage systems(BESSs)and *** proposed By adjusting the charge and discharge power of BESSs,the OLTC can frequently switch the transformer taps to achieve rapid voltage *** effectiveness of the proposed coordinated regulation strategy is verified in the IEEE 33 node distribution *** simulation results show that the proposed coordinated regulation strategy can stabilize the voltage of the distribution network within a normal range and reduce the frequency of tap switching,as such elongating the service life of the equipment.

关键词： distributed power generation voltage regulation distribution network on-load tapcharger(OLTC) battery energy storage system(BESS)

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Efficiency and safety evaluation of Baimai ointment for alleviating hypermyotonia following cerebral infarction

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Neural Regeneration Research 2007年第10期2卷 607-610页

作者： Sheng da liu Chu ming Jiang Dong hua li cui peng Xie Jian xin Yan Department of Neurology Beijing Aerospace General HospitalBeijing 100076China

Baimai ointment has Shujin and Huoluo efficiency. It has been confirmed by basic pharmacodynamic experiments that Baimai ointment has some therapeutic effects on stroke. However, the detailed evaluations of Baimai ointment on clinically treating stroke patients for function recovery are still insufficient with little reports. OBJECTIVE： To observe the efficiency and safety of Baimai ointment on alleviating hypermyotonia following cerebral infarction DESIGN： A randomized, parallel and controlled experiment. SETTING： Department of Neurology, Beijing Aerospace General Hospital. PARTICIPANTS： A total of 120 patients with acute front-cycle cerebral infarction were selected from Department of Neurology, Beijing Aerospace General Hospital from July to December 2006 and met the diagnosis criteria modified by Forth National Seminar on Cerebrovascular Disease. The experiment had got confirmed consent from local ethic committee. All 120 patients with cerebral infarction were randomly divided into experimental group （n =80; 32 in the acute phase, 32 in the recovery phase and 16 in the sequela phase） and control group （n =40; 16 in the acute phase, 16 in the recovery phase and 8 in the sequela phase）. METHODS： Within 4 weeks after the patients were enrolled in this study, no other traditional Chinese medicines containing similar components were adopted besides routine supporting therapy. The Baimai ointment being consisted of jianghuang, Roudoukou, Gansong, Yangqishi, Gancao, She, shannai, Zanghuixiang, Zangchangpu, huajiao and dianhua was used by trial group （20 g/ampoule, Tibet lingzhiqizheng Tibetan Drug Factory; batch number： 050403）, 2-3 times per day, the ointment was moderately coated traveling parts of Baimai. MAIN OUTCOME MEASURES： The evaluation of National Institutes of Health Stroke Scale （NIHSS）, Modified Rankin Scale and Modified Ashworth Scale were performed before administration, 2 and 4 weeks after administration. RESULTS： All 120 patients with acute front-cycle

关键词： ointments acupuncture points brain infarction muscle tonus

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Molecular Investigation of Theileria in Ixodid Ticks from Changzhi,Shanxi Province,China

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Biomedical and Environmental Sciences 2024年第8期37卷 922-925页

作者： Jia cui hua Xiang Rao Yiping liu Dongmei li Juan Yu Department of Microbiology of Basic Medical Sciences Changzhi Medical CollegeChangzhi 046000ShanxiChina Department of Epidemiology and Health Statistics of Public Health and Preventive Medicine Changzhi Medical CollegeChangzhi 046000ShanxiChina Department of Medical parasitology of Basic Medical Sciences Changzhi Medical CollegeChangzhi 046000ShanxiChina Department of Vector Biology and Control National Institute for Communicable Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 102206China

Theileria is a tick-borne intracellular protozoan that typically parasitizes erythrocytes,lymphocytes,and macrophages and causes acute clinical symptoms in host animals,including high fever,anemia,jaundice,and swelling of superficial lymph nodes[1].Theileriosis can lead to high mortality rates,and its rising global prevalence has resulted in significant economic losses to livestock husbandry and the national economy[2].

关键词： husbandry swelling typically

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A Dynamic Covalent Bonding-based Nanoplatform for Intracellular Co-Delivery of Protein Drugs and Chemotherapeutics with Enhanced Anti-Cancer Effect

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Chinese Journal of Polymer Science 2024年第5期42卷 559-569,I0005页

作者： Sai-Nan liu Jia-Hui Meng li-Yun cui hua Chen lin-Qi Shi Ru-Jiang Ma Key Laboratory of Functional Polymer Materials of Ministry of Education Institute of Polymer ChemistryTianjin Key Laboratory of Functional Polymer MaterialsState Key Laboratory of Medicinal Chemical BiologyFrontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin300071China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300192China

Efficient intracellular delivery of protein drugs is critical for protein *** combination of protein drugs with chemotherapeutics represents a promising strategy in enhancing anti-cancer ***,co-delivery systems for efficient delivery of these two kinds of drugs are still lacking because of their different ***,we show a well-designed delivery system based on dynamic covalent bond for efficient intracellular co-delivery of ribonuclease A(RNase A)and doxorubicin(DOX).Two polymers,PEG-b-P(Asp-co-AspDA)and PAE-b-P(Asp-co-AspPBA),and two 2-acetylphenylboronic acid(2-APBA)-functionalized drugs,2-APBA-RNase A and 2-APBA-DOX,self-assemble into mixed-shell nanoparticles(RNase A/DOX@MNPs)via dynamic phenylboronic acid(PBA)-catechol bond between PBA and dopamine(DA)*** PBA-catechol bond endows the nanoparticles with high stability and excellent stimulus-responsive drug release *** the slight acidic environment at tumor tissue,RNase A/DOX@MNPs are positively charged,promoting their *** cellular uptake into endosome,further protonation of PAE chains leads to the rupture of endosomes because of the proton sponge effect and the cleavage of PBA-catechol bond promotes the release of two *** cytoplasm,the high level of GSH removed the modification of 2-APBA on *** restored RNase A and DOX show a synergistic and enhanced antic-cancer *** system may be a promising platform for intracellular co-delivery of protein drugs and chemotherapeutics.

关键词： Drug co-delivery Combination therapy Dynamic covalent bond

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Optical system for extremely large spectroscopic survey telescope

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 158-174页

作者： Ding-qiang Su hua Bai Xiangyan Yuan Xiangqun cui Key Laboratory of the Ministry of Education School of Astronomy and Space ScienceNanjing UniversityNanjing 210023China Nanjing Institute of Astronomical Optics and Technology(NIAOT) Chinese Academy of SciencesNanjing 210042China University of Chinese Academy of Sciences Nanjing 211135China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 101408China

This article presents research work on a spectroscopic survey *** idea is as follows:for such a telescope,a pure reflecting optical system is designed,which should have an aperture and a field of view(FOV)both as large as possible and excellent image quality,and then a strip lensm(lens-prism)atmospheric dispersion corrector(S-ADC)is added,only for correcting the atmospheric *** the fund limitation and the simplicity of scaling up,some 12-m telescopes are designed as ***,Korsch,and Meinel put forward the four-mirror Nasmyth systems I and II,which are used in this *** of 1.5°,2°,and 2.5°are *** all systems,the image qualities are *** the S-ADC relaxes the optical glass size restriction,this 12-m telescope with a FOV of 2.5°can be magnified in proportion to a 16-m *** etendue(from Frenchétendue)and focal surface will now be the largest in the *** such a telescope,a pure reflecting optical system can also be obtained.A subsequent coudésystem is designed with excellent image quality.

关键词： telescopes spectroscopic survey

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Asperochones A and B,two antimicrobial aromatic polyketides from the endophytic fungus Aspergillus ***-2

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Chinese Chemical Letters 2024年第9期35卷 206-209页

作者： Hong Zhang cui-Ping li li-li Wang Zhuo-Da Zhou Wen-Sen li ling-Yi Kong Ming-hua Yang Jiangsu Key Laboratory of Bioactive Natural Product Research and State Key Laboratory of Natural Medicines China Pharmaceutical UniversityNanjing 210009China

Two novel fungal metabolites,asperochones A and B,were obtained from an Aspergillus *** structures were determined by 1D/2D nuclear magnetic resonance(NMR)spectroscopy,high resolution electrospray ionization mass spectroscopy(HRESIMS),and single-crystal X-ray diffraction *** A possesses an intriguing skeleton bearing 5/6/6/6/7/5/5/5 octacyclic ring system,and asperochone B also exhibits an unusual carbon skeleton with five stereochiral *** structures were proposed as heterotrimeric and heterodimeric products of aromatic *** addition,asperochone A exhibited a potential anti-tuberculosis effect since it showed a moderate potency against Mycobacterium smegmatis.

关键词： Aspergillus sp. Asperochones A and B Aromatic polyketides Heterotrimeric compound Anti-tuberculosis effect Antifibrotic activity

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Group Decision-Making Method of Entry Policy During a Pandemic

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Tsinghua Science and Technology 2024年第1期29卷 56-65页

作者： Chunsheng cui Baiqiu li Xianfeng Chen College of Computer and Information Engineering Henan University of Economics and LawZhengzhou 450046China Tourism College Beijing Union UniversityBeijing 100101China

Omicron,the new mutant coronavirus,has spread rapidly globally,attracting close attention from different stakeholders *** complex and constantly changing epidemic situation has had a new impact on the ***,this paper focuses on the characteristics of the rapid spread of the COVID-19 variant ***,epidemic prevention experts conduct preliminary screening as part of the existing epidemic plan database according to the current local situation,after which they sort the alternatives deemed more suitable for the *** the decision-makers identify the most divergent expert group,plan for consultation and adjustments,and finally obtain the plan with the smallest *** article aims to integrate the experts'opinions with the method of minimizing the differences,which can maximize the expert consensus and help organize the schemes that best meet the epidemic *** experts'negotiation and iteration of the differences in the initial plan align with the current complex and dynamic epidemic situation and are of great significance to the rapid formulation of plans to achieve effective prevention and control.

关键词： epidemic prevention and control group decision-making alternative ranking control policy

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Role of micro-Ca/In alloying in tailoring the microstructural characteristics and discharge performance of dilute Mg-Bi-Sn-based alloys as anodes for Mg-air batteries

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Journal of Magnesium and Alloys 2024年第1期12卷 251-266页

作者： Fei-er Shangguan Wei-li Cheng Yu-hang Chen Ze-qin cui Hui Yu Hong-xia Wang li-fei Wang Hang li hua Hou School of Materials Science and Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300132China School of Materials Science and Engineering North University of ChinaTaiyuan 030051China

The influence of micro-Ca/In alloying on the microstructural charac teristics,electrochemical behaviors and discharge properties of extruded dilute Mg-0.5Bi-0.5Sn-based(wt.%)alloys as anodes for Mg-air batteries are *** grain size and texture intensity of the Mg-Bi-Sn-based alloys are significantly decreased after the Ca/In alloying,particularly for the In-containing *** that,in addition to nanoscale Mg_(3)Bi_(2)phase,a new microscale Mg_(2)Bi_(2)Ca phase forms in the Ca-containing *** electrochemical test results demonstrate that Ca/In micro-alloying can enhance the electrochemical *** In to alloy the Mg-Bi-Sn-based alloy is effective in restricting the cathodic hydrogen evolution(CHE)kinetics,leading to a low self-corrosion rate,while severe CHE occurred after Ca *** micro-alloying of Ca/In to Mg-Bi-Sn-based alloy strongly deteriorates the compactness of discharge products film and mitigates the"chunk effect"(CE),hence the cell voltage,anodic efficiency as well as discharge capacity are greatly *** In-containing alloy exhibits outstanding discharge performance under the combined effect of the modified microstructure and discharge products,thus making it a potential anode material for primary Mg-air battery.

关键词： Mg-air batteries Mg-Bi-Sn based alloys Electrochemical behaviors Discharge properties

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