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Toxicological effects of PBDEs on carassius aurats

Chinese Journal Of Geochemistry 2010年第2期29卷 217-222页

作者： h.an Zhaoxlang LV Chunxia ZhENG Zengren School of Chemical Engineering Huaihai Institute of Technology Jiangsu Lianyungang 222005 China Jiaonan Agricultural Bureau Shandong Qingdao 266400 China Animal Quarantine Section Agricultural Ministry Shandong Qingdao 266033 China

In this study the effects of polybrominated diphenyl ether compounds (PBDEs), BDE-47 and BDE-99 on carassius aurats were discussed. The reproductive capacity viability and proliferation percent decreased with in-creasing BDE-47and BDE-99 concentrations (physiological bio-markers such as cholesterol (ChL), acetylcholinesterase (AChE), ethoxyresorufin-O-deethylase (EROD) and vitamin were studied to reveal the toxicological effects of BDE-47 and BDE-99 exposure. ChL levels generally decrease with increasing BDE-47 exposure. however, there were no significant differences between the samples and the con-trol. As to BDE-99, the ChL level decreased as compared with the control level when the BDE-99 concentrations reached 20 μg/L (phe degree of inhibition of the AChE increased with the increase of DE-47and BDE-99 concentrations. The EROD activity during 72 hours' exposure significantly increased to 20 μg/L for BDE-47 (phowever, EROD activity was not significantly different at different concentrations of BDE-99 (phepatocytes reacted to the BDE-47 exposure with increasing EROD activities in the dose depend-ent manner. Although at lower concentrations, the induced effects of BDE-47 and BDE-99 were not significantly different, though BDE-47 showed strong induced effects on the EROD activity with increasing concentrations in carassius aurats hepatocytes. In contrast, BDE-99 did not influence EROD activity consistently. The VA level of carassius aurats was significantly different from that of the controls for BDE-99 (phe VA level was significantly lower of carassius aurats than the controls for BDE-47 (phL, AChE, EROD, and VA levels in carassius aurats were differently affected by BDE-47 and BDE-99 exposures, therefore, they would be good indicators for exposure.

关键词： PBDEs 鲫鱼毒性

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Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr合金的淬火敏感性

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中南大学学报（自然科学版） 2017年第9期48卷 2301-2307页

作者：雷越刘胜胆李东锋韩素琦张新明中南大学材料科学与工程学院湖南长沙410083 有色金属先进结构材料与制造协同创新中心湖南长沙410083 湖南工程学院机械工程学院湖南湘潭411101

通过分级淬火的方法确定Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr合金的时间-温度-性能(TTP)曲线,并结合7050及7085合金考察成分对淬火敏感性的影响。研究结果表明:Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr合金T76状态的TTP曲线鼻尖温度为325℃,临界时间为1.554 s,99.5%的TTP曲线保温时间为100 s,合金的淬火敏感区间为200~410℃;该合金在等温保温过程中析出η相,消耗Zn和Mg,降低合金的过饱和程度,削弱后续时效强化的效果;合金时效后,在这些η相周围形成无沉淀析出区;Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr合金具有较低的淬火敏感性,该合金淬火冷却速度可以选择介于7050合金冷却速度与7085合金冷却速度之间。

关键词： Al-5.0Zn-3.0Mg-1.0Cu-0.1Zr合金淬火敏感性时效

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基于DWI的腹膜转移功能性肿瘤负荷可预测晚期卵巢癌不完全肿瘤减灭

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国际医学放射学杂志 2020年第6期 751-752页

作者：刘晨 E.Y.P.Lee h.an J.A.U.Perucho K.W.h.Chiu E.S.hui M.M.Y.Chu h.Y.S.Ngan Department of Diagnostic Radiology Queen Mary Hospital University of Hong Kong

摘要目的探讨基于DWI的腹膜转移(PC)量化评估在判断卵巢癌(OC)不完全肿瘤减灭中的预测价值。方法术前前瞻性纳入疑似Ⅲ-Ⅳ期或复发性OC病人行DWI检查。采

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山西中医药澳大利亚国际合作现状和前景

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山西高等学校社会科学学报 2018年第7期30卷 67-70页

作者：韩波闫娟娟曲新谱宋强山西中医药大学科技与国际合作处山西晋中030619 山西中医药大学医药管理学院山西晋中030619 山西留学管理委员会山西太原030000

中医药是我国独具特色的卫生资源,是我国医学科学和优秀传统文化的重要组成部分,能够在国际社会发挥科技、产业和文化影响力。山西是中医药的重要发祥地之一,中医药资源优势显著,但山西中医药事业在海外发展还比较慢。目前仅有山西中医... 详细信息

中医药是我国独具特色的卫生资源,是我国医学科学和优秀传统文化的重要组成部分,能够在国际社会发挥科技、产业和文化影响力。山西是中医药的重要发祥地之一,中医药资源优势显著,但山西中医药事业在海外发展还比较慢。目前仅有山西中医药大学在科研和教育领域与澳大利亚进行了合作。随着中药国际化的加快,需要加强山西中医药国际文化交流,打造山西中医药国际合作技术研究平台,特别需要培养和引进国际化中医药人才。

关键词：山西中医药澳大利亚国际合作

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单次激发回波平面和交错多次激发回波平面扩散加权成像对女性骨盆成像质量的定性和定量比较

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国际医学放射学杂志 2020年第3期 373-373页

作者： h.an X.Ma Z.Pan h.Guo E.Y.P.Lee 张国栋 Department of Diagnostic Radiology Queen Mary HospitalUniversity of Hong Kong

摘要目的就女性盆腔单次激发回波平面(SS-EPI)和多次激发回波平面(IMS-EPI)扩散加权成像(DWI)的影像质量的定性和定量比较。方法该前瞻性研究纳入80名接受

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Free vibration and buckling analysis of polymeric composite beams reinforced by functionally graded bamboo fbers

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Applied Mathematics and Mechanics(English Edition) 2024年第3期45卷 543-562页

作者： h.M.FEIZABAD M.h.YAS Department of Mechanical Engineering Razi UniversityKermanshah ***Iran

Natural fibers have been extensively researched as reinforcement materials in polymers on account of their environmental and economic advantages in comparison with synthetic fibers in the recent *** fibers are renowned for their good mechanical properties,abundance,and short cycle *** beams are one of the fundamental structural components and are susceptible to mechanical loads in engineering applications,this paper performs a study on the free vibration and buckling responses of bamboo fiber reinforced composite(BFRC)beams on the elastic *** different functionally graded(FG)layouts and a uniform one are the considered distributions for unidirectional long bamboo fibers across the *** elastic properties of the composite are determined with the law of *** hamilton’s principle,the governing equations of motion are *** generalized differential quadrature method(GDQM)is then applied to the equations to obtain the *** achieved outcomes exhibit that the natural frequency and buckling load values vary as the fiber volume fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of the beam ***,a comparative study is conducted between the derived analysis outcomes for BFRC and homogenous polymer beams to examine the effectiveness of bamboo fibers as reinforcement materials,demonstrating the significant enhancements in both vibration and buckling responses,with the exception of natural frequencies for cantilever beams on the Pasternak foundation with the FG-◇fiber ***,the obtained analysis results of BFRC beams are also compared with those for carbon nanotube reinforced composite(CNTRC)beams found in the literature,indicating that the buckling loads and natural frequencies of BFRC beams are lower than those of CNTRC beams.

关键词： bamboo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature method(GDQM)

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holographic dark energy in non-conserved gravity theory

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Communications in Theoretical Physics 2024年第4期76卷 126-133页

作者： h R Fazlollahi Institute of Gravitation and Cosmology Peoples Friendship University of Russia(RUDN University)6 Miklukho-Maklaya StMoscow117198Russia

Recently, reconsidering the Rastall idea T_(μ;νν)^(v)=α_(,μ) through relativistic thermodynamics gives a new form for the scalar field α which led us to construct modern modified theory of gravity debugged ‘non-conserved gravity theory’ Fazlollahi 2023 Euro. Phys. J. C 83 923. This theory unlike other modified theories of gravity cannot directly explain the current acceleration expansion in the absence of the cosmological constant and or existence of other forms of dark energy. hence, in this study we have reinvestigated holographic dark energy Ρ_(X)~h^(2) in the non-conserved theory of gravity. In this context, the density and pressure of dark energy depend on the non-conserved term and density of the dust matter field. As shown, due to non-conservation effects on large-scale structures, unlike the original holographic model, our model onsets an acceleration epoch for the current Universe satisfies observations. Moreover, the interaction and viscous scenarios are studied for this model.

关键词： non-conserved gravity covariant form of thermodynamics holographic dark energy

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Convexification of hybrid AC-DC Optimal Power Flow with Line-Commutated Converters

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 617-628页

作者： hongyuan Liang Zhigang Li J.h.Zheng Q.h.Wu School of Electric Power Engineering South China University of TechnologyGuangzhou 510641China

Line-commutated converter (LCC)-based high-voltage DC (hVDC) systems have been integrated with bulk AC power grids for interregional transmission of renewable power. The nonlinear LCC model brings additional nonconvexity to optimal power flow (OPF) of hybrid AC-DC power grids. A convexification method for the LCC station model could address such nonconvexity but has rarely been discussed. We devise an equivalent reformulation for classical LCC station models that facilitates second-order cone convex relaxation for the OPF of LCC-based AC-DC power grids. We also propose sufficient conditions for exactness of convex relaxation with its proof. Equivalence of the proposed LCC station models and properties, exactness, and effectiveness of convex relaxation are verified using four numerical simulations. Simulation results demonstrate a globally optimal solution of the original OPF can be efficiently obtained from relaxed model.

关键词： AC-DC power system convex relaxation linecommutated converter optimal power flow second-order cone programming

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Shell-model representations of the microscopic version of the Bohr-Mottelson collective model

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Communications in Theoretical Physics 2024年第8期76卷 79-90页

作者： h G Ganev Joint Institute for Nuclear Research DubnaRussia Institute of Mechanics Bulgarian Academy of SciencesSofiaBulgaria

The structure of the irreducible collective spaces of the group Sp(12,R),which many-particle nuclear states are classified according to the chain Sp(12,R)⊃U(6)⊃SO(6)⊃SU_(pn)(3)⊗SO(2)⊃SO(3)of the proton-neutron symplectic model(PNSM),is considered in *** chain of the PNSM was recently shown to correspond to a microscopic shell-model version of the Bohr-Mottelson collective *** construction of the relevant shell-model representations of the Sp(12,R)group along this chain is considered for three nuclei with varying collective properties and from different mass *** is shown that the SU_(pn)(3)basis states of the Sp(12,R)representations belonging to the SO(6)irreps with seniorityυ≥υ0,withυ0 denoting the maximal seniority SO(6)irrep contained in the Sp(12,R)bandhead,are always Pauli allowed,but organized in a different way into different SO(6)*** is in contrast to the case of filling the levels of the standard three-dimensional harmonic oscillator and using the plethysm *** the SU_(pn)(3)multiplets withinυhe present work are important for the practical application of the microscopic version of the Bohr-Mottelson collective model.

关键词： microscopic shell-model version of the Bohr-Mottelson model proton-neutron symplectic model Sp(12,R)dynamical algebra shell-model representations

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Marinoan glaciation in the Indian subcontinent——Anatomy and global implications

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Journal of Palaeogeography 2024年第2期13卷 293-308页

作者： h.N.Bhattacharya Department of Earth Sciences Techno India UniversityWest BengalSector VSalt LakeKolkata700091India

Detailed sedimentological analysis of the Pokaran Boulder Bed,representing the most basal unit of the Neoproterozoic-Lower Cambrian Marwar Supergroup,clearly indicates its glacial *** glacial sediments are interpreted as an ice-contact submarine fan *** on the detrital and inherited zircon population of the Marwar Supergroup sediments and interlayered pyroclastic deposits,a Marinoan cryochron of the Cryogenian Period is envisaged for the Pokaran Boulder *** well-preserved Ediacaran elements in the post-glacial sedimentary succession also support a Cryogenian to Early Cambrian age of the Marwar *** glacial deposition at the base of the Marwar Supergroup strengthens the regional correlation between the studied sediments with the Lesser himalayan Blaini-Krol-Tal sediments and the haqf Supergroup of *** available zircon ages and paleomagnetic data of the Malani Igneous suite,along with the Marinoan glacial deposits,detrital zircon ages,and Ediacaran fossil elements of the Marwar Supergroup add significant information to the Neoproterozoic Earth history.

关键词： Neoproterozoic Marinoan glaciation Diamictites Pokaran Boulder Bed Marwar Supergroup

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