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Investigating the effect of volatility on the hygroscopicities of acetate nanoparticle aerosols by surface plasmon resonance microscopy

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Journal of Environmental Sciences 2024年第4期138卷 167-178页

作者： Bo Yang zhibo Xie Jianguo Liu Huaqiao gui Jiaoshi zhang Xiuli Wei Zetao Fan Douguo zhang Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsHefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China university of Science and Technology of china Hefei 230026China CAS Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Advanced Laser Technology Laboratory of Anhui Province Department of Optics and Optical EngineeringUniversity of Science and Technology of ChinaHefei 230026China

Under high relative humidity(RH)conditions,the release of volatile components(such as acetate)has a significant impact on the aerosol *** this work,one surface plasmon resonance microscopy(SPRM)measurement system was introduced to determine the hygroscopic growth factors(GFs)of three acetate aerosols separately or mixed with glucose at different *** Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) aerosols,the hygroscopic growth trend of each time was lower than that of the previous time in three cyclic humidification from 70% RH to 90% RH,which may be due to the volatility of acetic acid leading to the formation of insoluble hydroxide(Ca(OH)_(2) or Mg(OH)_(2))under high RH *** the third calculated GF(using the Zdanovskii-Stokes-Robinson method)for Ca(CH_(3)COO)_(2) or Mg(CH_(3)COO)_(2) in bicomponent aerosols with 1:1 mass ratio were 3.20% or 5.33% lower than that of the first calculated GF at 90% *** calculated results also showed that the hygroscopicity change of bicomponent aerosol was negatively correlated with glucose content,especially when the mass ratio of Mg(CH_(3)COO)_(2) to glucose was 1:2,the GF at 90% RH only decreased by4.67% after three cyclic *** coupled plasma atomic emission spectrum(ICP-AES)based measurements also indicated that the changes of Mg^(2+)concentration in bicomponent was lower than that of the *** results of this study reveal thatduring the efflorescence transitions of atmospheric nanoparticles,the organic acids diffusion rate may be inhibited by the coating effect of neutral organic components,and the particles aging cycle will be prolonged.

关键词： Hygroscopic growth Volatility Acetate aerosols Nanoparticle aerosol Surface plasmon resonance

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Intermittent disturbance mechanical behavior and fractional deterioration mechanical model of rock under complex true triaxial stress paths

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International Journal of Mining Science and Technology 2024年第1期34卷 117-136页

作者： zhi Zheng Hongyu Xu Kai zhang Guangliang Feng Qiang zhang Yufei Zhao State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Key Laboratory of Disaster Prevention and Structural Safety of Ministry of EducationCollege of Civil Engineering and ArchitectureGuangxi UniversityNanning 530004China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan 430071China State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower ResearchBeijing 100080China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China

Mechanical excavation,blasting,adjacent rockburst and fracture slip that occur during mining excavation impose dynamic loads on the rock mass,leading to further fracture of damaged surrounding rock in three-dimensional high-stress and even causing ***,a novel complex true triaxial static-dynamic combined loading method reflecting underground excavation damage and then frequent intermittent disturbance failure is *** triaxial static compression and intermittent disturbance tests are carried out on *** effects of intermediate principal stress and amplitude on the strength characteristics,deformation characteristics,failure characteristics,and precursors of monzogabbro are analyzed,intermediate principal stress and amplitude increase monzogabbro strength and tensile fracture *** increases in microseismic parameters during rock loading can be precursors for intermittent rock *** on the experimental result,the new damage fractional elements and method with considering crack initiation stress and crack unstable stress as initiation and acceleration condition of intermittent disturbance irreversible deformation are proposed.A novel three-dimensional disturbance fractional deterioration model considering the intermediate principal stress effect and intermittent disturbance damage effect is established,and the model predicted results align well with the experimental *** sensitivity of stress states and model parameters is further explored,and the intermittent disturbance behaviors at different f are *** study provides valuable theoretical bases for the stability analysis of deep mining engineering under dynamic loads.

关键词： True triaxial static and disturbance test Mechanical properties Failure mechanism and precursor Intermittent disturbance effect Fractional mechanical model

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SYNTHESIS AND STRUCTURE OF A MIXED-VALENCE HEXAMOLYBDENUM COMPLEX [Et_4N]_2[Mo_6O_(19)H_4]

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Chinese Chemical Letters 1992年第6期3卷 459-462页

作者： Shu Jia LI Heng Bin zhang Shu Yun NIU Guang Di YANG Fu NIE department of chemistry, institute of Theoretic chemistry, jilin university, changchun, 130023

A hexamolybdenum complex, [Et_4N]_2[Mo_6O_(19)H_4] crystal, with pentavalent and hexavalent molybdenum has been obtained in the solution of DMF and CH_3OH as organic solvents using MoCl_5 as a starting material. The crystallographic parameters obtained by X-ray diffraction analysis are: crthorhombic, a=10. 757(3), b=10. 763(2), c=14. 238(4)A, =1648. 9A^3; Z=2; space group Pnnm; final R=0. 047; final Rw=0. 051^(**)

关键词： Mo6O SYNTHESIS AND STRUCTURE OF A MIXED-VALENCE HEXAMOLYBDENUM COMPLEX H4 Et4N

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Investigation on Molecular and Crystal Structures of Metal Complexes with Aminopolycarboxylic Acids(Ⅰ)─Synthesis and Structure of Na_2[Fe~Ⅲ(ida)2]2·3H_2O

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Chinese Chemical Letters 1997年第8期8卷 741-744页

作者： Jun WANG Wei Qun zhang Xi Ming SONG Xiang Dong zhang (department of chemistry, Liaoning university,Shenyang 110036)Yan XING Yong Hua LIN Heng Qing JIA Lei zhang(changchun institute of Applied chemistry, Chinese Academy of Sciences, changchun 130024) department of chemistry Liaoning University Shenyang 110036 China changchun Inst. of Applied chemistry Chinese Academy of Sciences Changchun 130024 China

The crystal structure of the title complex salt has been determined by single-crystal X-ray structure analysis. The crystal data are as follows; Monoclinic, P21/c, a=15.6480(10)A,b=16.7870(10)A, c=10.347(2)A, β=90.790(10), V=2717.7(6)A3, Z=3, and R=0.0333 for 4789 unique reflections. The complex anion has a pseudo-octahedral structure distorted more than the CrⅢand CoⅢ analogs, in which cach iminodiacetato ligand (ida2-) is coordinated in a facial fashion with the two N atoms in a cis configuration, resulting in an unsyin-fac structure.

关键词： Na Synthesis and Structure of Na2[Fe Investigation on Molecular and Crystal Structures of Metal Complexes with Aminopolycarboxylic Acids ida)2]2

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Chinese patients with adult onset leukodystrophy caused by CST3 variants

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Journal of Genetics and Genomics 2024年第7期51卷 778-780页

作者： Yi zhang zhi-Ying Wu department of Medical Genetics and Center for Rare Diseases Zhejiang Key Laboratory of Rare Diseases for Precision Medicine and Clinical TranslationSecond Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310009China Nanhu Brain-computer Interface institute HangzhouZhejiang 314050China department of Neurology Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310009China MOE Frontier Science Center for Brain Science and Brain-machine Integration School of Brain Science and Brain MedicineZhejiang UniversityHangzhouZhejiang 310012China

Leukodystrophies represent a group of cerebral white matter disorders that mainly affect axon-glia *** disorders are clinically diverse and display significant genetic *** is challenging to differentiate hereditary leukodystrophies,particularly those that present in adulthood,from acquired leukodystrophies and other genetic disorders,such as multiple sclerosis(MS)or hereditary spastic paraplegia(HSP)(Wei et al.,2021).Over the past few decades,a series of causative genes associated with leukodystrophies have been identified(Kohler et al.,2018).Nevertheless,a significant proportion of patients still lack a precise molecular diagnosis.

关键词： al. patients Kohler

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Analysis of Low-polar Ginsenosides in Steamed Panax Ginseng at High-temperature by HPLC-ESI-MS/MS

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Chemical Research in Chinese Universities 2012年第1期28卷 31-36页

作者： zhang Yu-chi1,2, PI Zi-feng1, LIU Chun-ming2, SONG Feng-rui1, LIU zhi-qiang1 and LIU Shu-ying1 1. changchun Center of Mass Spectrometry, changchun institute of Applied chemistry, Chinese Academy of Sciences, changchun 130022, P. R. china 2. Central Laboratory, changchun Normal university, changchun 130032, P. R. china changchun Center of Mass Spectrometry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 Central Laboratory Changchun Normal University Changchun 130032

A high performance liquid chromatography coupled with electrospray ionization-tandem mass spectrome try（HPLC-ESI-MS/MS） method was developed for the analysis and identification of ginsenosides in the extracts of raw Panax ginseng（RPG） and steamed Panax ginseng at high temperatures（SPGHT）. A total of 25 ginsenosides were extracted include of which 10 low-polar ginsenosides, such as ginsenosides F4, Rk3, Rh4, 20S-Rg3, 20R-Rg3 and so on, were identified according to their HPLC retention time and MS/MS data. The results indicated that the low polar ginsenosides were seldom found in RPG. For the exploration of the transformation pattern of the ginsenosides in steam processing, the standards of ginsenosides Re, Rg1, Rb1, Rc, Rb2, Rb3 and Rd were selected and hydrolyzed at a temperature of 120 oC. The results show that these polar ginsenosides can be converted to low-polar ginsenosides such as Rg2, Rg6, F4, Rk3 and Rg5 by hydrolyzing the sugar chains.

关键词： Ginsenoside Hydrolysis Steamed Panax ginseng High performance liquid chromatography coupled withelectrospray ionization-tandem mass spectrometry(HPLC-ESI-MS/MS)

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Synthesis and Structure of K_8[P_2W_18Mo_2Co_2O_68(H_2O)_2][MoO_6]·15H_2O

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Chemical Research in Chinese Universities 1993年第4期9卷 351-353页

作者： zhang Heng-bin , YANG Guang-di, QI Xing-yi and LI Shu-jia (department of chemistry, jilin university, changchun, 130023)LI Zhong-hua(department of Chemical Engineering, Harbin Shipbuilding Engineering institute, Harbin, 150001)

Recently, Many tri-component heteropoly compounds have been synthesized, but tetra-component heteropoly compounds have not been reported. It is known that mixtures of Mo and Co oxides are a promoted hydrodesulphurization catalyst. The title compound is a polyoxophosphate containing Mo, Co and W, the divalent anion possesses two-fused Keggin structure, whereas MoO;has been confirmed to be an elementary structure unit of isopoly and heteropoly molybdates, but it, as an idependent anion, has not been reported either.

关键词： Heteropolyacid Synthesis Structure

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A theoretical Study of Photochemical Reaction for Synthesis of Thiirane

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Chemical Journal of Chinese Universities 1988年第3期 40-45页

作者： Yu Hengtai, Shen Erzhong, Ye Yuanjie zhang Gang.(institute of theoretical chemistry, jilin university,changchun)

The geometrical configurations of the products in reaction of sulfur and ethylene are optimized by use of UHF method and 3-21G basis sets and the potential energy surfaces for resulting thiirane are calculated using STO-3G + CI(100×100) . The possibilities of obtaining the thiirane on the surfaces of low-lying excited states are discussed. The energies of low-lying excited states of thiirane and the corresponding configurations are predicted by using 4-31G basis sets + CI(100×100) finally.

关键词： thiirane excited states ethylene sulfur photochemistry.

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theoretical studies on Lewis acidity scale and bonding character of boron trihalides BX_3(X=F, Cl, Br, I) by DV-X_α quantum chemical approach

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Chinese Journal of chemistry 1997年第1期15卷 17-20页

作者： CAI, Zheng-Ting LI, Ci-Rant zhang, Rui-Qin DENG, Cong-Haoinstitute of theoretical Chemstry, department of chemistry, department of Physics Shandong university, Jinan, Shandong 250100, china institute of theoretical chemistry Jinan Shandong 250100 China department of chemistry Shandong university Jinan Shandong 250100 China department of Physics Shandong university Jinan Shandong 250100 China

The Lewis acidity scale of boron trihalides BX3 (X=F, Cl, Br, I) and character of the boron-halogen bonds have been studied by means of DV-Xa approach. Present results show that the acid strength of boron trihalides i... 详细信息

关键词： Lewis acidity scale boron trihalides valence of boron DV-Xα quantum chemical approach

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Advances in MET tyrosine kinase inhibitors in gastric cancer

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Cancer Biology & Medicine 2024年第6期21卷 484-498页

作者： Yifan zhang Lin Shen zhi Peng Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDepartment of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China

Gastric cancer is among the most frequently occurring cancers and a leading cause of cancer-related deaths *** gastric cancer is highly heterogenous and comprised of different subtypes with distinct molecular and clinical characteristics,the management of gastric cancer calls for better-defined,biomarker-guided,molecular-based treatment *** is a receptor tyrosine kinase mediating important physiologic processes,such as embryogenesis,tissue regeneration,and wound ***,mounting evidence suggests that aberrant MET pathway activation contributes to tumour proliferation and metastasis in multiple cancer types,including gastric cancer,and is associated with poor patient *** such,MET-targeting therapies are being actively developed and promising progress has been demonstrated,especially with MET tyrosine kinase *** review aims to briefly introduce the role of MET alterations in gastric cancer and summarize in detail the current progress of MET tyrosine kinase inhibitors in this disease area with a focus on savolitinib,tepotinib,capmatinib,and *** on current knowledge,this review further discusses existing challenges in MET alterations testing,possible resistance mechanisms to MET inhibitors,and future directions of MET-targeting therapies.

关键词： Gastric cancer MET alterations MET tyrosine kinase inhibitors savolitinib MET testing

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