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巴西人参根化学成分的研究(Ⅱ)

中成药 2024年第5期46卷 1545-1551页

作者：黄锦程周小青颜冬梅唐琍萍刘宏栋李斌江西中医药大学院士工作站江西南昌330004

目的研究巴西人参根Pfaffia glomerata(Spreng)Pedersen的化学成分。方法巴西人参根95%乙醇、50%乙醇提取物采用硅胶、D101大孔树脂、葡聚糖凝胶LH-20、聚酰胺、ODS、制备型HPLC及重结晶进行分离纯化,根据理化性质及波谱数据鉴定所得化... 详细信息

目的研究巴西人参根Pfaffia glomerata(Spreng)Pedersen的化学成分。方法巴西人参根95%乙醇、50%乙醇提取物采用硅胶、D101大孔树脂、葡聚糖凝胶LH-20、聚酰胺、ODS、制备型HPLC及重结晶进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。结果从中分离得到18个化合物,分别鉴定为1,2,4-苯三酚(1)、polypodine B(2)、(-)-丁香脂素-4-O-β-D-吡喃葡萄糖苷(3)、poststerone(4)、stachysterone B(5)、calonysterone(6)、taxisterone(7)、makisterone C(8)、20,22-O-(R-ethylidene)-20-hydroxyecdysone(9)、20,22-O-(R-3-methoxycarbonyl)propylidene-20-hydroxyecdysone(10)、shidasterone(11)、5α-20-hydroxyecdysone(12)、abutasterone(13)、25-hydroxydacryhainansterone(14)、甲基-α-D-呋喃果糖苷(15)、甲基-β-D-呋喃果糖苷(16)、竹节参皂苷Ⅳa甲酯(17)、尿嘧啶核苷(18)。结论化合物1~6、8~16、18首次从巴西人参中分离得到,化合物1、3~6、8~16、18首次从珐菲亚属植物中分离得到。

关键词：巴西人参根化学成分分离鉴定甾酮

Semiunitary Transforrnation and Isospectral Hamiltonians in Arbitrary Dimensional Space

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Communications in Theoretical Physics 2001年第7期36卷 25-28页

作者： RUAN Dong WANG Xue-jin huang Wei-cheng SUN Hong-Zhou Department of Physics Tsinghua University Beijing 100084 China The Key Laboratory of Quantum Information and Measurements of MOE Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China Department of Electronic Engineering Tsinghua University Beijing 100084 China The Key Laboratory of Quantum Information and Measurements of MOE Tsinghua University Beijing 100084 China Institute of Applied Chemistry Xinjiang University Urumqi 830046 China Department of Physics Tsinghua University Beijing 100084 China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Accelerator Lanzhou 730000 China

By means of the complex Clifford algebra, a new realization of multi-dimensional semiunitary transformation is put forward and then applied to studying the isospectrality of nonrelativistic Hamiltonians of multi-dimensional quantum mechanical systems, in which the generalized Pauli coupling interaction and spin-orbit coupling interaction appear naturally. Moreover, it is shown that the semiunitary operators, together with the Hamiltonian of quantum mechanical system, satisfy the polynomially-deformed angular momentum algebra.

关键词： semiunitary transformation, action-angle approach, isospectrality of Hamiltonians, deformed angular momentum algebra

Extraction of coal-tar pitch using NMP/ILs mixed solvents

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Science China Chemistry 2014年第12期57卷 1760-1765页

作者： huang jin cheng LI Chun Shan BAI Lu NIE Yi WANG Er Qiang HE Yu Jian ZHANG Suo Jiang School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing Key Laboratory of Ionic Liquids Clean Process State Key Laboratory of Multiphase Complex SystemsInstitute of Process Engineering Chinese Academy of Sciences

Coal-tar pitch(CP)is a promising carbon raw material for producing needle coke,carbon fiber *** processing,the H/C ratio,ash content,and quinoline insoluble(QI)in the CP are the key factors that influence the material *** this study,NMP was selected to extract CP first;then[BMIM]Cl/NMP mixed solvent was used;and finally a series of ionic liquids(ILs)mixtures with NMP were developed for the extraction of CP to obtain the refined *** extracts were analyzed via elemental analysis,TGA,FT-IR,and *** indicate that different NMP/IL mass ratios or different kinds of ILs have impact on the extraction *** relationship of the hydrogen to carbon(H/C)ratio changed with different solvents and QI extracts were *** showed that the H/C ratios changed little between NMP extracts and could be adjusted by changing the NMP/ILs mass ratio or using different *** extracts are suitable for preparation mesophase pitch because of no ash content,low QI,and appropriate H/C *** a result,NMP can be used to refine *** addition,[BMIM]Cl is good mixed with NMP for CP extraction,because it can obtain a relatively high yield under the same extraction conditions.

关键词： coal-tar pitch ionic liquid NMP extraction H/C

Higher-dimensional integrable deformations of the classical Boussinesq-Burgers system

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Communications in Theoretical Physics 2024年第6期76卷 1-12页

作者： Xiaoyu cheng Qing huang School of Mathematics Northwest UniversityXi'an 710127China

In this paper,the(1+1)-dimensional classical Boussinesq-Burgers(CBB)system is extended to a(4+1)-dimensional CBB system by using its conservation laws and the deformation *** Lax integrability,symmetry integrability and a large number of reduced systems of the new higher-dimensional system are ***,for illustration,an exact solution of a(1+1)-dimensional reduced system is constructed from the viewpoint of Lie symmetry analysis and the power series method.

关键词： classical Boussinesq-Burgers system higher-dimensional system deformation algorithm Lax pair conservation law

Highlights in recent wireless power IC research

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Journal of Semiconductors 2024年第4期45卷 5-7页

作者： cheng huang Junyao Tang Iowa State University AmesIowa50011USA

Wireless power transfer(WPT)has been a popular topic in power integrated circuit(IC)designs in the past *** slogan"cutting the last wire"presented in ISSCC’15[1],WPT is poised to take over many wired power deliveries applica-tions today,just like what happened to wireless communica-tion *** the years,WPT has become more mature and more wirelessly charged or powered products have become available on the *** mini review intends to summarize recent breakthroughs in WPT inte-grated circuits(IC)research.

关键词： WPT power wireless

Improvements in properties of NdFeB magnets obtained via magnetron sputtering and thermal diffusion

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Journal of Rare Earths 2024年第9期42卷 1710-1716,I0003页

作者： jin Tang Weichao huang Dan Li School of Electronic Engineering Guangxi University of Science and TechnologyLiuzhou545006China China Rare Earth(Guangxi)jinyuan Rare Earth New Materials Co. Ltd.Hezhou542603China China Rare Earth Group Co. Ltd.Ganzhou341000China Center of Experimental Teaching for Common Courses Panzhihua UniversityPanzhihua617000China

The grain boundary diffusion process(GBDP) of Dy and DyAl on sintered NdFeB magnets was conducted via magnetron-sputtering deposition of Dy and DyAl films to enhance coercivity(H_(cj)),The magnetic properties,microstructure and anti-corrosion properties of Dy-surface-alloying NdFeB magnets obtained via magnetron sputtering and thermal diffusion were *** H_(cj) of the Dy_(95)Al_(5)-NdFeB magnet increases by 32.68%,while the remanence declines ***,X-ray diffraction and microstructural analysis confirm the formation of Dy-rich shells,the higher-magnetic-anisotropy field of hard(Nd_(x)Dy_(1-x))2(FeAl)_(14)B magnetic phases and an optimised grain boundary structu re,contributing to the H_(cj)enhancement of the *** elemental distribution and diffusion mechanism of the magnets are also ***,the corrosion resistance of the Dy_(95)Al_(5)-NdFeB magnet is substantially improved by enhancing the electrochemical stability and optimising the distribution and morphology of the intergranular *** findings of this study are of substantial importance in the development of low-heavy rare-earth sintered NdFeB magnets.

关键词： Magnetron sputtering NdFeB Rare earths Microstructure Magnetic property Corrosion resistance

Negative feedback regulation of PROG1 in rice

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Journal of Integrative Agriculture 2024年第9期23卷 3234-3237页

作者： jinlin Bao jing huang Xiaoqing Yang Xizhi Li Shengjie cheng Wei huang Jun Wang Jian jin State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Nanning 530004China College of Life Science and Technology Guangxi UniversityNanning 530004China College of Life Sciences South China Agricultural UniversityGuangzhou 510642China National Key Laboratory of Plant Molecular Genetics/Center for Excellence in Molecular Plant Sciences Chinese Academy of Sciences(CAS)/Institute of Plant Physiology and EcologyCASShanghai 200032China

Cultivated rice(Oryza sativa L.),one of the most widely grown and important crops worldwide,is believed to have been domesticated from the ancestral wild rice(Oryza rufipogon Griff.)thousands of years ago(cheng et al.... 详细信息

关键词： Oryza crops Cultivated

Multi-omics analysis to identify CBR3-AS1-hsa-miR-145-5p-MAP3K5 pathway as a ferroptosis-related ceRNA network in benign prostatic hyperplasia

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Genes & Diseases 2024年第5期11卷 105-108页

作者： Liang Zhou Youyou Li Jiaren Li Hanyu Yao jin huang cheng Li Long Wang Department of Urology The Third Xiangya Hospital of Central South UniversityChangshaHunan 410013China

In aging males,benign prostatic hyperplasia(BPH)is a chronic pathological process that primarily causes lower urinary tract *** to histopathology,BPH is caused by an imbalance between cell death and proliferation.1 However,the exact pathophysiology remains *** is a newly discovered form of programmed cell *** cell morphology is characterized primarily by the reduction or disappearance of mitochondrial cristae and mitochondrial shrinkage.2,3 Competing endogenous RNAs(ceRNAs)are important regulators of many biological processes and have been involved in various diseases.

关键词： prostatic endogenous BPH

Analytical model for the sealant performance of tunnel gasketed joints based on multi-scale contact and percolation theories

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Underground Space 2024年第1期14卷 319-337页

作者： Jiachong Xie Xin huang Guolong jin Department of Geotechnical Engineering College of Civil EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Geotechnical and Underground Engineering Ministry of EducationShanghai 200092China College of Civil Engineering&Architecture Xinjiang UniversityUrumqi 830047China China Shipbuilding NDRI Engineering Co. Ltd.Shanghai 200063China

The localised leakage in shield tunnels that mainly occurs at segment joints may induce other defects,which threatens operational *** obtain a universal solution for the sealant performance of gasketed joints,we proposed a novel analytical model based on the multiscale contact and percolation theories,in which the obtained percolation pressure and interfacial separation can be utilized to derive the critical water leakage pressure and leakage *** evolutionary process of leakage was divided into three stages(i.e.,the percolation,leakage and breakdown),which explicitly reveal the progressive hydraulic deterioration of gasketed *** gaskets still own partial waterproof capacity until the end of the leakage stage due to the remaining contact pressure at surface *** proposed model was first verified by several sets of experimental data,based on which the determination of three key model parameters(i.e.,self-sealing slope,sealing coefficient,and expel pressure)were discussed in *** parametric study indicates that the waterproof capacity is significantly affected by the joint opening,offset,and the surface roughness of the *** variation in waterproof capacity with joint opening is mainly due to the nonlinearity of the gasket’s modulus and self-sealing *** increase in joint offset can result in a lower waterproof capacity as well as a larger leakage ***’s surface roughness affects the percolation pressure and interfacial separation,which contributes to the long-term sealant performance.

关键词： Shield tunnel Gasketed joint Sealant performance Hydraulic deterioration Percolation theory Surface roughness Leakage rate