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Synthesis and Fungicidal Activity of 2-Acetyl-6-（un）substituted-1 H-benzimidazole Oxime-ethers

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Chinese Journal of Chemistry 2011年第3期29卷 539-543页

作者： jiang, Lin wang, Haibo Mu, Wei ji, Zengchen Cao, Peng College of Chemistry and Material Science Shandong Agricultural University Taian Shandong 271018 China College of Plant Protection Shandong Agricultural University Taian Shandong 271018 China

Twelve novel compounds of 2-acetyl-lH-benzimidazole oxime-ethers and 2-acetyl-6-chloro-1H-benzimidazole oxime-ethers were synthesized with o-phenylenediamine （or 4-chloro-o-phenylenediamine）, 2-hydroxypropyl acid, alkoxy （or benzyloxy） amines hydrochloride as starting materials. The structures of the target compounds were characterized by IR, 1H NMR spectra and elemental analyses. The in vitro fungicidal activities against Botrytis cinerea Pers and Alternaria alternata were also evaluated by mycelium growth rate method. The results indicate that the compounds 3b, 3c, 3f, 3g and 3h exhibit good activities against Botrytis cinerea Pers, while 3b and 3f possess excellent activities against Alternaria alternate, and their fungicidal activities are all higher than that of carbendazim.

关键词： benzimidazole oxime-ether synthesis biological activity

Crop Diversification in Coping with Extreme Weather Events in China

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Journal of Integrative Agriculture 2014年第4期13卷 677-686页

作者： HUANG ji-kun jiang jing wang jin-xia HOU Ling-ling Center for Chinese Agricultural Policy Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences University of Chinese Academy of Sciences

Apart from the long-term effects of climate change, the frequency and severity of extreme weather events have been increasing. Given the risks posed by climate change, particularly the changes in extreme weather events, the question of how to adapt to these changes and mitigate their negative impacts has received great attention from policy makers. The overall goals of this study are to examine whether farmers adapt to extreme weather events through crop diversification and which factors influence farmers＇ decisions on crop diversification against extreme weather events in China. To limit the scope of this study, we focus on drought and flood events only. Based on a unique large-scale household survey in nine provinces, this study finds that farmers respond to extreme weather events by increasing crop diversification. Their decision to diversify crops is significantly influenced by their experiences of extreme weather events in the previous year. Such results are understandable because farmers＇ behaviors are normally based on their expectations. Moreover, household characteristics also affect farmers＇ decisions on crop diversification strategy, and their effects differ by farmers＇ age and gender. This paper concludes with several policy implications.

关键词： adaptation extreme weather event climate change crop diversification farmer

Intermediate-mass black holes in Green pea galaxies(IMBH-GP)I:A candidate sample from LAMOST and SDSS

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 147-161页

作者： Ruqiu Lin Zhen-Ya Zheng Fang-Ting Yuan Jun-Xian wang Chunyan jiang Ning jiang Lingzhi wang Linhua jiang Xiang ji Shuairu Zhu Xiaodan Fu Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences South America Center for Astronomy(CASSACA) National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China

The scaling relation of central massive black holes(M_(BH)s)and their host galaxies is well-studied for supermassive BHs(SM_(BH)s,M_(BH)≥10^(6)M_(⊙)).However,this relation has large uncertainties in the mass range of the intermediate-mass BHs(IM_(BH)s,M_(BH)~10^(3)-10^(6)M_(⊙)).Since Green pea(GP)galaxies are luminous compact dwarf galaxies,which may be likely to host less massive SM_(BH)s or even IM_(BH)s,we systematically search for M_(BH)s in a large sample of 2190 GP galaxies at z<0.4,selected from LAMOST and SDSS spectroscopic ***,we report a newly discovered sample of 59 M_(BH) candidates with broad Hα*** sample has a median stellar mass of 108.83±0.11M_(⊙)and hosts M_(BH)s with single-epoch virial masses ranging from M_(BH)~10^(4.7)to 10^(8.5)M_(⊙)(median 105.85±0.64M_(⊙)).Among the 59 M_(BH) candidates,36 have black hole masses M_(BH)≤10^(6)M_(⊙)(IM_(BH) candidates),one of which even has M_(BH)■10^(5)M_(⊙).We find that the M_(BH)-M_(*)relation of our M_(BH) sample is consistent with the M_(BH)-M_(bulge)relation for SM_(BH)s,while is above the M_(BH)-M_(*)relation for M_(BH)s in dwarf galaxies in the same mass ***,we show that 25 M_(BH) candidates,including 4 IM_(BH) candidates,have additional evidence of black hole activities,assessed through various methods such as the broad-line width,BPT diagram,mid-infrared color,X-ray luminosity,and radio *** studies show that it is very promising to find IM_(BH)s in GP galaxies,and the BH sample so obtained enables us to probe the connection between the M_(BH)s and compact dwarf galaxies in the low-redshift Universe.

关键词： SMBHs IMBHs Green pea galaxies compact dwarf galaxies

THE(U+K)-ORBITS OF ESSENTIALLY NORMAL OPERATORS AND THEIR STRONG IRREDUCIBILITY

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Chinese Annals of Mathematics,Series B 1998年第2期19卷 217-228页

作者： ji YOUQING jiang CHUNLAN jilin Univ Inst Math Changchun 130023 Peoples R China

The authors characterize the (U+K) orbits of a class essentially normal operators and prove that some essentially normal operators with connected spectrum are strongly irreducible after a small compact perturbation.... 详细信息

关键词： Strongly irreducible operator Compact perturbation Normal operator

Machine Learning for Selecting Important Clinical Markers of Imaging Subgroups of Cerebral Small Vessel Disease Based on a Common Data Model

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Tsinghua Science and Technology 2024年第5期29卷 1495-1508页

作者： Lan Lan Guoliang Hu Rui Li Tingting wang Lingling jiang jiawei Luo Zhiwei ji Yilong wang IT Center Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijing 100070China West China Biomedical Big Data Center West China HospitalSichuan UniversityChengdu 610044China College of Artificial Intelligence Nanjing Agricultural UniversityNanjing 210095China

Differences in the imaging subgroups of cerebral small vessel disease(CSVD)need to be further ***,we use propensity score matching to obtain balanced *** random forest(RF)is adopted to classify the subgroups compared with support vector machine(SVM)and extreme gradient boosting(XGBoost),and to select the *** top 10 important features are included in the stepwise logistic regression,and the odds ratio(OR)and 95%confidence interval(CI)are *** are 41290 adult inpatient records diagnosed with *** and area under curve(AUC)of RF are close to 0.7,which performs best in classification compared to SVM and *** and 95%CI of hematocrit for white matter lesions(WMLs),lacunes,microbleeds,atrophy,and enlarged perivascular space(EPVS)are 0.9875(0.9857−0.9893),0.9728(0.9705−0.9752),0.9782(0.9740−0.9824),1.0093(1.0081−1.0106),and 0.9716(0.9597−0.9832).OR and 95%CI of red cell distribution width for WMLs,lacunes,atrophy,and EPVS are 0.9600(0.9538−0.9662),0.9630(0.9559−0.9702),1.0751(1.0686−1.0817),and 0.9304(0.8864−0.9755).OR and 95%CI of platelet distribution width for WMLs,lacunes,and microbleeds are 1.1796(1.1636−1.1958),1.1663(1.1476−1.1853),and 1.0416(1.0152−1.0687).This study proposes a new analytical framework to select important clinical markers for CSVD with machine learning based on a common data model,which has low cost,fast speed,large sample size,and continuous data sources.

关键词： common data model machine learning cerebral small vessel disease imaging subgroups clinical markers

New specimens of Stenocybus acidentatus(Therapsida: Dinocephalia) from the Middle Permian Dashankou Fauna of China

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Acta Geologica Sinica(English Edition) 2014年第3期88卷 730-737页

作者： jiang Shan ji Shu-an Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Stratigraphy and Paleontology Ministry of Land and Resources

The basal dinocephalian clade Stenocybusidae was known from two incomplete specimens representing one generus,Stenocybus,from Dashankou fanua in Yumen,Gansu Province of *** holotype of Stenocybus acidentatus is laterally compressed,making some characters *** we describe two new specimens of Stenocybus acidentatus from the same locality,an anterior portion of skull with articulated jaws,and a right dentary with nearly complete *** show some detailed features on the morphology of the premaxilla,maxilla,nasal,external nares and *** phylogenetic relationship between Stenocybus acidentatus and the relatively large Sinophoneus yumenensis is still difficult to determine,and needs more new complete material and further evidences.

关键词： Dinocephalia Stenocybusidae Dashankou Fauna Middle Permian

A One-pot Procedure to Prepare Ethynylferrocene and Iodoethynylferrocene

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Chinese Chemical Letters 2001年第5期12卷 387-390页

作者： ji Shan WU Chun Yan CHI Xian Hong wang Xiao jiang ZHAO ji LI Fo Song wang State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022

Ethynylferrocene and iodoethynylferrocene were prepared in high yield as 88-90% through a one-pot procedure. 1, 1'-diiodoferrocenylene was in-situ prepared from reaction of CHI3 PPh3, t-BuOK and ferrocenecarboxaldehyd... 详细信息

关键词： Ferrocene derivatives Wittig-type reaction.

Reduction of residual stress in porous Ti6Al4V by in situ double scanning during laser additive manufacturing

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International Journal of Minerals,Metallurgy and Materials 2021年第11期28卷 1844-1853页

作者： Yi-wa Luo Ming-yong wang ji-guo Tu Yu jiang Shu-qiang jiao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Department of Orthopedics Peking University Third HospitalBeijing 100191China

Selective laser melting(SLM)technology plays an important role in the preparation of porous titanium(Ti)implants with complex structures and precise ***,the processing characteristics of this technology,which include rapid melting and solidification,lead to products with high residual ***,an in situ method was developed to restrain the residual stress and improve the mechanical strength of porous Ti alloys during laser additive *** brief,porous Ti6Al4V was prepared by an SLM three-dimensional(3D)printer equipped with a double laser system that could rescan each layer immediately after solidification of the molten powder,thus reducing the temperature gradient and avoiding rapid melting and *** indicated that double scanning can provide stronger bonding conditions for the honeycomb structure and improve the yield strength and elastic modulus of the *** with an energy density of 75%resulted in 33.5%–38.0%reductions in residual *** porosities of double-scanned specimens were 2%–4%lower than those of singlescanned specimens,and the differences noted increased with increasing sheet *** rescanning laser power should be reduced during the preparation of porous Ti with thick cell walls to ensure dimensional accuracy.

关键词： porous titanium selective laser melting additive manufacturing residual stress mechanical properties

The synergistic role of Ti microparticles and CeO_(2) nanoparticles in tailoring microstructures and properties of high-quality Ni matrix nanocomposite coating

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Journal of Materials Science & Technology 2022年第10期105卷 182-193页

作者： Lianbo wang Shilong Xing Zizhen Shen Huabing Liu Chuanhai jiang Vincent ji Yuantao Zhao School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China ICMMO/SP2M Universite Paris-SaclayOrsay 91405France Zhejiang Scientific Research Institute of Transport Hangzhou 310023China Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

In current work,Ni-Ti-CeO_(2) nanocomposite coatings were achieved by co-adding Ti microparticles and CeO_(2) *** experiments and COMSOL computer simulation were applied to reveal the synergistic role of Ti microparticles and CeO_(2) nanoparticles in tailoring the spatial microstructures and properties of Ni-Ti-CeO_(2) nanocomposite ***,the conductive Ti microparticles conducted the growth behavior of Ni grains by current density concentration,distorting electronic feld lines and heterogeneous *** domains consisting of inner nanograins and outer radial columnar grains surrounded Ti microparticles,where Ti microparticles acted as *** microparticles tended to be aggregated,leading to spatial heterogeneity of *** deposits buried the Ti microparticles in forms of“covering model”,contributing to the formation of inside voids and rough surface and aggregation of Ti microparticles;on the other hand,the non-conductive CeO_(2)microparticles hardly changed the distribution of current density and electronic feld lines on the cathode *** deposits buried the CeO_(2)microparticle in forms of“stacking model”,avoiding the inside voids and aggregation of *** incorporation of CeO_(2)microparticle brought in microstructure evolutions only on its top side without disturbing the growth behavior of Ni grains on its lateral side or bottom,suggesting the limited *** was correlated with the presence of current concentration above the CeO_(2) microparticle at the last stage of burying CeO_(2) *** co-addition of Ti microparticles and CeO_(2) nanoparticles into Ni deposits exploited the complementary action of the two particles,which gave birth to satisfed spatial microstructures and improved *** microparticles took major responsibility for microstructure evolutions,while the CeO_(2) nanoparticles were mainly in charge of the microstructure homogeneity.

关键词： Nanocomposite coating CeO_(2)nanoparticle Ti microparticles Grain growth behavior COMSOL computer simulation Spatial microstructure and spatial hardness