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Synthesis and characterization of bis-[1]rotaxanes via salen-bridged bis-pillar[5]arenes

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Chinese Chemical Letters 2020年第3期31卷 725-728页

作者： Ying Han Cui-yun nie Shuo Jiang Jing Sun Chao-Guo Yan College of Chemistry&Chemical Engineering Yangzhou UniversityYangzhou 225002China

The series of salen-bridged bis-pillar[1]arenes were conveniently prepared by condensation reaction of5,5'-methylenebis(2-hydroxybenzalde hyde)or 5,5'-(propane-2,2-diyl)bis(2-hydroxybenzaldehyde)with mono-amido-functionalized pillar[5]arenes containing different terminal aminoalkyl groups in refluxing ***^1H NMR and 2D-NOESY spectra indicated that the salen-bridged bis-pillar[5]arenes with longer allcylene linker(n=3,4,6)formed the fascinating bis-[1]rotaxanes,while the salenbridged bis-pillar[5]arenes with short hydrazine and ethylenediamino linker(n=0,2)predominately existed in free *** single crystal structure of the bis-pillar[5]are ne ambiguously indicated that two propylenediamino linker inserted in to two cavities of pillar[5]arene to form a novel bis-[1]rotaxanes.

关键词： Pillararene Salen Rotaxane Bis-rotaxane Interlocked molecule

Synthesis of cerium oxalate hydrate by precipitation technique under external magnetic field

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Rare Metals 2023年第3期42卷 1028-1035页

作者： Jian-Bo Yu Zhi-Gang Yang Zhi-Hao Wang Ting-Sheng Tu Zhen-Qiang Zhang Jing-yun Li yun-Bo zhong zhong-Ming Ren State Key Laboratory of Advanced Special Steels School of Material Science and EngineeringShanghai UniversityShanghai 200072China School of Material Science and Engineering Shijiazhuang Tiedao UniversityShijiazhuang 050043China

Cerium oxalate hydrate particles were synthesized by precipitation technique under external magnetic field with respective intensities of 0,0.1,0.3,and 0.6 *** particle morphologies were investigated by scanning electron microscopy(SEM)and transmission electron microscope(TEM).Results show that external magnetic field has a great influence on the growth behavior of cerium oxalate hydrate ***-like and plate-like cerium oxalate hydrate particles with smaller size are formed without the applying of external magnetic ***,the extremely big rod-like particles with the average size of 12.47μm were prepared under external magnetic field of 0.6 *** increasing magnetic field intensity makes the grain grow *** analysis supports the presence of 8.5 H_(2)O molecules associated with cerium ***,the growth mechanism of cerium oxalate hydrate under external magnetic field was briefly discussed.

关键词： Cerium oxalate hydrate Precipitation technique Magnetic field Grain Growth

Evaluation of short-and medium-term efficacy and complications of ultrasound-guided ablation for small liver cancer

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World Journal of Clinical Cases 2022年第14期10卷 4414-4424页

作者： Hua zhong Rong Hu yun-Shan Jiang Department of Ultrasound Medicine The Central Hospital of YongzhouYongzhou 425000Hunan ProvinceChina

BACKGROUND To ensure clinical efficacy and prolong patient survival,treatments such as surgery and microwave ablation(MWA)are used for early liver *** is preferred because it effectively preserves the normal liver tissue and causes transient coagulation necrosis of local liver tumor ***,due to technical limitations,the cancerous liver tissue cannot be completely ablated;therefore,the probability of local tumor recurrence is *** To investigate the clinical efficacy and safety of ultrasound-guided percutaneous MWA in the treatment of small liver *** A total of 118 patients treated for small liver cancer in The Central Hospital of Yongzhou from January 2018 to April 2019 were ***-six patients received ultrasound-guided percutaneous MWA(MWA group)and 52 received laparoscopic surgery(laparoscope group).The operation time,blood loss,hospital stay,and medical expenses of both groups were statistically *** alanine aminotransferase(ALT),aspartate aminotransferase(AST),total bilirubin(TBIL),albumin(ALB),alpha fetal protein(AFP),carcinoembryonic antigen(CEA),and peripheral blood regulatory T lymphocytes(Treg)levels were evaluated pre-and *** cross-sectional area of tumors measured before and after ablation was analyzed statistically;the therapeutic effect was compared between both groups in terms of surgical complications,2-year progression-free survival rate,and overall survival *** The operation time,blood loss,hospital stay,and medical expenses in the MWA group were lower than those of the laparoscope group,and the differences were significant(P0.05).The operation time,blood loss,hospital stay,and medical expenses for 2 d and 1 wk after surgery,the ALT and AST of the MWA group were lower than those of the laparoscope group,and the difference was significant(P<

关键词： Ultrasound guidance Microwave ablation Small liver cancer Laparoscope Laparoscopic surgery Percutaneous microwave ablation

NECESSARY PRINCIPLES FOR ESTABLISHING FUNDAMENTAL EQUATIONS OF MULTIPHASE FLOW

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维普期刊数据库

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Journal of Hydrodynamics 1991年第1期3卷 22-25页

作者： zhong, Zhao-xin Ma, Geng-di Wang, yun Univ of Science and Technology of China Hefei China

The fundamental equations of multiphase flow that have been established so far fall into two main groups, the multifluid model and the mixture model [1] [2]. Because of the different forms of the equations derived from these two models, many disputes arose [1] [3] [4]. This paper deals mainly with the basic principles for establishing the fundamental equations of multiphase flow, namely the principles of consistency, invariance of material coordinates and material indifference. The results lead to the consistent description of the two models.

关键词： Equations of Motion Flow of Fluids Two Phase Fluid Mechanics Mathematical Techniques Differential Equations

Optimized XML Storage in NXD Based on Tree-Structure Disassemble

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 93-99页

作者： LIU yun-sheng WANG Yi zhong Hao School of Computer Science and Technology Huazhong University of Science and Technology Wuhan 430074Hubei China

Independent XML storage based on XSD （XML Schema Document） is adopted in NXD（Native XML Data base）, XMI. storage structure based on tree-structure disassemble and the algorithm used in dynamically updating XML document are provided in this paper. The main idea is that in term of data model of XML document, XML document is parsed to Document Structure-Tree with Hierarchical Model and Leaf-Data with Relation Model for storage. Simultaneously Proxy node is imported in order to solve the problem that XML data store in cross-blocks. And with XSD model information, sparse index is constructed to save storage space. It is proved that this storage structure could improve efficiency of XML document operation.

关键词： XML storage storage model NXD (native XML database) document trees regular expression

Effects of magnetic fields on Fe–Si composite electrodeposition

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International Journal of Minerals,Metallurgy and Materials 2014年第12期21卷 1175-1186页

作者： Qiong Long yun-bo zhong Huai Wang Tian-xiang Zheng Jun-feng Zhou zhong-ming Ren Shanghai Key Laboratory of Modern Metallurgy and Material Processing Shanghai University

Coatings containing Fe-Si particles were electrodeposited on 3.0wt% Si steel sheets under magnetic fields. The effects of magnetic flux density （MFD）, electrode arrangement and current density on the surface morphology, the silicon content in the coatings and the cathode current efficiency were investigated. When a magnetic field was applied parallel to the current and when the MFD was less than 0.5 T, numerous needle-like structures appeared on the coating surface. With increasing MFD, the needle-like structures weakened and were transformed into dome-shaped structures. Meanwhile, compared to results obtained in the absence of a magnetic field, the silicon content in the coatings significantly increased as the MFD was increased for all of the samples obtained using a vertical electrode system. However, in the case of an aclinic electrode system, the silicon content decreased. Furthermore, the cathode current efficiency was considerably diminished when a magnetic field was applied. A possible mechanism for these phenomena was discussed.

关键词： composite coatings electrodeposition silicon steel magnetic field surface morphology silicon content magnetohydrodynamics

On K-groups of Operator Algebras on HD_n Spaces and QD_n Spaces

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Acta Mathematica Sinica,English Series 2010年第12期26卷 2355-2368页

作者： Li Qiong LIN Huai Jie zhong yun Nan ZHANG School of Mathematics and Computer Science Fujian Normal University Fuzhou 350007 P. R. China College of Mathematics and Computer Science Fuzhou University Fuzhou 350002 P. R. China School of Mathematics and Computer Science Fujian Normal University Fuzhou 350007 P. R. China

We obtain the K-groups of the operator ideals contained in the class of Riesz operators. And based on the results, we calculate the K-groups of the operator algebras on HD nspaces and QDn spaces.

关键词： HDn spaces QDn spaces operator algebras K-groups

Global Attractors for a Nonclassical Diffusion Equation

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Acta Mathematica Sinica,English Series 2007年第7期23卷 1271-1280页

作者： Chun You SUN Su yun WANG Cheng Kui zhong School of Mathematics and Statistics Lanzhou University Department of Mathematics Lanzhou Teachers College

We prove the existence of global attractors in H0^1 （Ω） for a nonclassical diffusion equation. Two types of nonlinearity f are considered： one is the critical exponent, and the other is the polynomial growth of ar... 详细信息

关键词： nonclassical diffusion equation critical exponent polynomial growth of arbitrary order global attractor asymptotic a priori estimate

Synthesis and biological evaluation of 3-(piperidin-4-yl)isoxazolo[4,5-d]pyrimidine derivatives as novel PI3Kδ inhibitors

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Chinese Chemical Letters 2015年第10期26卷 1283-1288页

作者： Jia-Lin Guo yun-Yong Liu Ya-zhong Pei The Center for Combinatorial Chemistry and Drug Discovery of Jilin University School of Pharmaceutical Sciences Jilin University Nanjing Gator Medi Tech Company Ltd.

An efficient synthesis of novel 3-（piperidin-4-yl）isoxazolo[4,5-d]pyrimidine scaffold has been designed and deveopled. A series of 5-phenylurea derivatives was synthesized using this method. Their cytotoxic activities against breast cancer cell line BT-474 were evaluated by CCK-8 assay. Most of them showed potent anti-proliferative activities, of which compound 20 and 21 exhibited IC50 s of 1.565 mmol/L and1.311 mmol/L, respectively. Furthermore, compound 20 and 21 also showed potent inhibitory activities against PI3 Kd with IC50 s of 0.286 mmol/L and 0.452 mmol/L, respectively. These results indicate that these 3-（piperidin-4-yl）isoxazolo[4,5-d]pyrimidine derivatives are novel antitumor agents through the inhibition of PI3 Kd.

关键词： Synthesis Isoxazolopyrimidine PI3Kδ inhibitors Cytotoxicity