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Pilaring of Zn_2Al Layered Double Hydroxide by dawson Polyoxometalate Anions

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Chemical Research in Chinese Universities 1998年第2期14卷 68-70页

作者： GUO Jun LI Yun-lun JIAO Qing-ze jiang da-zhen MIN En-ze Department of Chemistry Jilin UniversityChangchun130023 Research Institute of Petroleum Processing Beijing100083

Zn2Al layered double hydroxide pillared with dawson polyoxometalates,P2W17ZO8-61(Z=Mn2+,Co2+,Ni2+,Cu2+,Zn2+)was prepared.A basal space ofca.16 nm indicates the intercalated dawson ions to be oriented with their C2 axis perpendicular to the double hydroxide layers(with the exception of P2W17ZnLDH).The IR and^(13)P MASNMR spectral reveal that the dawson ions retain their integrity in the interlayer space of LDH.A preliminary study shows that these compounds are highly active catalysts for the oxidation of cyclohexene with molecular oxygen.

关键词： Pillaring dawson structure Polyoxometalate anions

Alkylation　of　Benzene　with　Propene　over　Hβ　Zeolite──The　Effect　of　Reaction　Conditions　on　the　Distribution　of　Products

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Chemical Research in Chinese Universities 1995年第1期11卷 39-44页

作者： MA Jun SHEN Jian-ping SUN Tie and jiang da-zhen(Department of Chernistry , Jilin University , Changchun , 130023 ) JILIN UNIV DEPT CHEMCHANGCHUN 130023PEOPLES R CHINA

he effects of reaction temperature , flow rate of carrier gas , space velocity andbenzene to propene ratio on the alkylation of benzene with propene over Hβ zeolitewere investigated. At lower flow rate of carrier gas and space velocity, higher ben-zene to propene ratio the formation of cumene is favoured due to the difference be-tween rates of reactions of the alkylation of benzene (or cumene) with propene andthe alkyltranslation of diisopropylbenzene with benzene. The propylbenzene is pro-duced directly by the alkylation of benzene with propene.

关键词： Benzene Propene Alkylation Hβ zeolite

Catalytic Oxidation of Cyclohexene with Molecular Oxygen on Hydrotalcite－like Compounds

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Chemical Research in Chinese Universities 1995年第3期11卷 256-258页

作者： Guo, Jun Wang, Ning Jiao, Qing-ze jiang, da-zhen Yang, Guang-hui Min, En-ze JILIN UNIV DEPT CHEMCHANGCHUN 130023PEOPLES R CHINA EDUC INST JILIN PROV DEPT CHEMCHANGCHUN 130021PEOPLES R CHINA RES INST PETR PROC BEIJING 100083PEOPLES R CHINA

ＣａｔａｌｙｔｉｃＯｘｉｄａｔｉｏｎｏｆＣｙｃｌｏｈｅｘｅｎｅｗｉｔｈＭｏｌｅｃｕｌａｒＯｘｙｇｅｎｏｎＨｙｄｒｏｔａｌｃｉｔｅ－ＩｉｋｅＣｏｍｐｏｕｎｄｓＧＵＯＪｕｎ，ＷＡＮＧＮｉｎｇ，ＪＩＡＯＱｉｎｇ－ｚｅａｎｄ... 详细信息

ＣａｔａｌｙｔｉｃＯｘｉｄａｔｉｏｎｏｆＣｙｃｌｏｈｅｘｅｎｅｗｉｔｈＭｏｌｅｃｕｌａｒＯｘｙｇｅｎｏｎＨｙｄｒｏｔａｌｃｉｔｅ－ＩｉｋｅＣｏｍｐｏｕｎｄｓＧＵＯＪｕｎ，ＷＡＮＧＮｉｎｇ，ＪＩＡＯＱｉｎｇ－ｚｅａｎｄＪＩＡＮＧＤａ－ｚｈｅｎ（Ｄｅｐａ...

关键词： Catalytic Oxidation Cyclohexene Molecular oxygen

Characterization and Catalytic Activity of Titanium-containing Aluminum Phosphate Prepared by Sol-gel and Nonuniform Precipitation for O-Alkylation of Catechol with Ethanol

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Chemical Research in Chinese Universities 2003年第3期19卷 330-334页

作者： PAN Chun-liu ZHANG Wen-xiang LI Xue-mei jiang da-zhen WU Tong-hao College of Chemistry Jilin UniversityChangchun 130023P.R.China

Three titanium-containing aluminum phosphate catalysts with a general formula Al 0.77 Ti 0.23 PO 4 were prepared by the sol-gel method at room temperature(APTS), and a nonuniform precipitation procedure at room temperature(APTR) and under reflux(APTF), respectively. The structural features and the surface properties of the three catalysts were determined by means of the physical adsorption of nitrogen at liquid N 2 temperature, XRD, UV-Vis, NH 3-TPD and IR of adsorbed pyridine. The vapor phase O-alkylation of catechol with ethanol over the prepared catalysts was studied. It was found that the activity and the selectivity of these catalysts are greatly dependent on the preparation method, and catalyst APTF shows the highest activity and selectivity. The characterization evidence indicates that the weak Brnsted acid sites were more effective for the reaction.

关键词： Catechol Alkylation Ethanol Aluminum phosphate

Research of CdZnTe detector based portable energy dispersive spectrometer

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Nuclear Science and Techniques 2006年第2期17卷 106-112页

作者： CHENG Cheng WEI Yong-Bo XU Hui-Chao ZHAO Cui-Lan ZHANG Jin-Zhou PU Shi-Jie jiang da-zhen Shanghai Institute of Applied Physics the Chinese Academy of Sciences Shanghai 201800 China

A kind of excellent CdZnTe crystal has been grown in Yinnel Tech, Inc. in recent years. Based on these CdZnTe crystals and some new techniques, a portable energy-dispersive spectrometer has been constructed which has yielded good results. CdZnTe detector has a 3% relative resolution in high-energy field and can detect gamma rays at room temperature. An integrated circuit based on preamplifier and shaping amplifier chips is connected to the detector. Voltage pulses are transformed into digital signals in MCA (multichannel analyzer) and are then transmitted to com- puter via USB bus. data process algorithms are improved in this spectrometer. Fast Fourier transform (FFT) and nu- merical differentiation (ND) are used in energy peak’s searching program. Sampling-based correction technique is used in X-ray energy calibration. Modified Gaussian-Newton algorithm is a classical method to solve nonlinear curve fitting problems, and it is used to compute absolute intensity of each detected characteristic line.

关键词： CdZnTe探测器前置放大器能量弥散光谱仪光谱分析

Synthesis and characterization of molecular sieve Ni-ZSM-5 and its single crystal

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Chinese Journal of Chemistry 1991年第2期9卷 109-115页

作者： YAO,Shang-Qing QIU,Shi-Lun PANG,Wen-Qin SUN,Tie jiang,da-zhen Department of Chemistry,Jilin University,Changchun 130023 Department of Chemistry Jilin University Changchun 130023

Using tetrapropylammonium bromide(TPABr)as a template,molecular sieve Ni-ZSM-5 and its single crystals were synthesized in a nonalkaline system in the presence of fluoride *** means of XRD,IR,EPMA,MAS NMR,EPR,DTA and H_2-TPR techniques,it is proved that the hetero-atom,nickel,is really located in the zeolite *** finally,Ni-ZSM-5 was found to have high catalytic cracking reactivity.

关键词： SM Synthesis and characterization of molecular sieve Ni-ZSM-5 and its single crystal Ni

Cisplatin-based miRNA delivery strategy inspired by the circCPNE1/miR-330-3p pathway for oral squamous cell carcinoma

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2748-2760页

作者： Hua-yang Fan Ming-da Zhao Hong-jie jiang zhen-wei Yu Yu-jiang Fan Xin-hua Liang Ya-ling Tang Yong Sun State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Oral and Maxillofacial Surgery West China Hospital of StomatologySichuan UniversityChengdu 610041China National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610065China State Key Laboratory of Oral Diseases&National Center for Stomatology&National Clinical Research Center for Oral Diseases&Department of Oral Pathology West China Hospital of StomatologySichuan UniversityChengdu 610041China

Circular RNAs(circRNAs)are ideal biomarkers of oral squamous cell carcinoma(OSCC)because of their highly stable closed-loop structure,and they can act as microRNA(miRNA)sponges to regulate OSCC *** analyzing clinical samples,we identified circCPNE1,a dysregulated circRNA in OSCC,and its expression level was negatively correlated with the clinical stage of OSCC ***-of-function assays revealed the tumor-suppressive effect of circCPNE1,which was then identified as a miR-330-3p ***-330-3p was recognized as a tumor promoter in multiple studies,consistent with our finding that it could promote the proliferation,migration,and invasion of OSCC *** results indicated that selective inhibition of miR-330-3p could be an effective strategy to inhibit OSCC ***,we designed cationic polylysine-cisplatin prodrugs to deliver antagomiR-330-3p(a miRNA inhibitory analog)via electrostatic interactions to form PP@miR nanoparticles(NPs).Paratumoral administration results revealed that PP@miR NPs effectively inhibited subcutaneous tumor progression and achieved partial tumor elimination(2/5),which confirmed the critical role of miR-330-3p in OSCC *** findings provide a new perspective for the development of OSCC treatments.

关键词： Oral squamous cell carcinoma CircRNA MiRNA sponge Antagomir MiRNA delivery Cisplatin-based nanoparticles Drug delivery systems Tumor elimination

Energy-Preserving Parareal-RKN Algorithms for Hamiltonian Systems

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Numerical Mathematics(Theory,Methods and Applications) 2024年第1期17卷 121-144页

作者： zhen Miao Bin Wang Yaolin jiang School of Mathematics and Statistics Northwestern Polytechnical UniversityXi’an 710072P.R.China School of Mathematics and Statistics Xi’an Jiaotong UniversityXi’an 710049P.R.China

In this paper,we formulate and analyse a kind of parareal-RKN algo-rithms with energy conservation for Hamiltonian *** proposed algorithms are constructed by using the ideas of parareal methods,Runge-Kutta-Nystr¨om(RKN)methods and projection *** is shown that the algorithms can exactly pre-serve the energy of Hamiltonian ***,the convergence of the integra-tors is rigorously *** numerical experiments are carried out to support the theoretical results presented in this paper and show the numerical behaviour of the derived algorithms.

关键词： Parareal methods Runge-Kutta-Nystr¨om methods Hamiltonian systems energy conservation

Adsorption of Benzene on the Potassium Exchanged Hbeta Zeolites

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Chemical Research in Chinese Universities 1994年第2期10卷 120-125页

作者： SHEN Jian-ping MA Jun SUN Tie and jiang da-zhen(Department of Chemistry, Jilin University, Changchun , 130023)MIN En-ze(Research Institute of Petroleum Processing, Beijing, 100083)

n situ iR studies of benzene adsorbed on different potassium-exchanged degrees of KHβ zeolites were carried out under different conditions. The bands of adsorbed benzene on KHβ zeolites in the range of 2050-1750 cm-1 were *** KHβ zeolite has basicity only when the ratio of K to AI of KHβ is up to88. 39%, its basicity is stronger and its acidity is weaker. The order of stability ofthe adsorbed benzene species on the samples is O>H>K>b.

关键词： Absorption Benzene. Zeolite