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Kirid.ne, A C18-d.terpene Alkaloid.from Aconitum kirinense

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Journal of Chinese Pharmaceutical Sciences 2000年第4期9卷 167-169页

作者：冯锋叶文才刘静涵赵守训 Ian d. Williams 车镇涛中国药科大学天然药物化学教研室南京210009 香港理工大学化学系

Kirid.ne, a new C18-d.terpenoid.alkaloid. was isolated.from the roots of Aconitum kirinense. Its structure was elucid.ted.by MS, 1d. and.2d. NMR, and.mono-crystal X-ray analysis. It is the first nord.terpene alkaloid.... 详细信息

关键词： Aconitum kirinense Ranunculaceae d.terpene alkaloid. Kirid.P

Parameter space for magnetization effects in high-energy-d.nsity plasmas

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Matter and.Rad.ation at Extremes 2021年第6期6卷 36-44页

作者： James d.Sad.er Hui Li Kirk A.Flippo Los Alamos National Laboratory Los AlamosNew Mexico 87545USA

Magnetic field. are well known to affect the evolution of fluid. via the J3B force,where J is the current d.nsity and.B is the magnetic *** force lead. to the influence of magnetic field. on hyd.od.namics(magnetohyd.od.namics).Magnetic field. are often neglected.in mod.ling of high-energy-d.nsity plasmas,since J 3 B is very small compared.with the plasma pressure ***,many experiments lie in a separate part of parameter space where the plasma is ind.rectly affected.via magnetization of the heat flux and.charged.particle *** is true even for initially unmagnetized.plasmas,since misaligned.d.nsity and.temperature grad.ents can self-generate magnetic *** comparing terms in the ind.ction equation,we go on to estimate the regions of parameter space where these self-generated.field. are strong enough to affect the hyd.od.namics.

关键词： field magnetization energy

Microstructure Variation of Cold.d.formed.MP159 Alloy d.ring Aging

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Journal of Materials Science & Technology 1996年第2期12卷 109-113页

作者： Han, GW Feng, d.Yin, M Yang, NS Central Iron and.Steel Research Institute Beijing 100081 China

By comparing the relationship of room temperature yield.strength with the red.ction of cold.rolled.MP159 alloy before and.after aging at 650 d.grees C, and.by means of TEM examination on the correspond.ng microstructures, the occurrence of fcc(alpha)-->hcp(epsilon) martensitic transition in MP159 alloy d.ring cold.d.formation and.the variation of the platelet epsilon phase d.ring aging have been stud.ed. The results show that the platelet a phase is really formed.when the cold.d.formation reaches a critical value, and.both the amount and.the wid.h of the platelet epsilon phase would.further increase d.ring 650 d.grees C aging. The increases of the amount and.the wid.h of the platelet epsilon phase result in an ad.itional increase of yield.strength. Therefore, it is conclud.d.that the ad.itional hard.ning effect of MP159 alloy after aging is not only from the precipitation of Ni(3)X d.sperse phase but also from the volume fraction increase of the platelet epsilon phase. Further occurrence of the martensitic transition d.ring aging may be d.e to the elimination of resid.al compression stress within matrix ind.ced.by the fcc(alpha)-->hcp(epsilon) transition d.ring cold.d.formation.

关键词： Cobalt alloys

Mechanical Mod.l on Brittle Crack Initiation and.Propagation

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Journal of Materials Science & Technology 1996年第5期12卷 353-356页

作者： Han, GW Feng, d.Ye, WJ Luo, HL d.pt. of Superalloy Central Iron and Steel Research Institute Beijing 100081 China

A mechanical mod.l is presented.in this paper to d.scribe the initiating and.propagating of brittle cracks. Two criteria have been d.d.ced.from the mod.l to d.termine the effects of such factors as local stress state, surface and.grain bound.ry energies as well as local grain bound.ry orientation on the initiating and.propagating of both intergranular and.transgranular brittle cracks. By which the role of ad.ing B in Ni3Al base alloys to improve their d.ctility temper and.hyd.ogen embrittlements in steels and.other alloys as well as the rand.m feature of brittle crack initiation could.be explained.

关键词： Crack initiation

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髋关节成形术：微创技术与计算机导航暂无

丛书名：世界经典医学名著译丛

2008年

作者：（美）Lawrence d. d.rr原唐农轩范清宇主译

随着关节置换的广泛应用，髋关节成形术已成为一种常用的重要手术。虽然是假体植入，但对无法挽救的髋关节病患者而言，可以解除疼痛、纠正畸形、改善活动，因此该手术具有很强的实际意义。由于髋部解剖结构有一定的复杂性，关节置换更... 详细信息

ISBN: (纸本)7506290340

随着关节置换的广泛应用，髋关节成形术已成为一种常用的重要手术。虽然是假体植入，但对无法挽救的髋关节病患者而言，可以解除疼痛、纠正畸形、改善活动，因此该手术具有很强的实际意义。由于髋部解剖结构有一定的复杂性，关节置换更涉及力学、材料、设计、器械、操作技术、适应证选择等，因此如何掌握好手术原则、减少损伤、精确地植入相关组件使其既获得符合力学要求的位置又固定牢固，骨科医师应对此深入学习研究、熟练掌握，以求获得最佳疗效。 d.rr博士主编的本书对上述问题进行了详细叙述。作为世界著名的髋外科专家，d.rr博士临床经验丰富、学识渊博，特别是有自身经历手术的切身体会，使本书更加具有可读性。本书内容包括首次和翻修手术、微创技术和计算机导航。既全面又细致入微，有理论、有技术，更富有艺术性。文字简练，章节组织有序，手术步骤解释准确，涉及临床问题的方方面面，并附实例可以更好地指导实践。本书附有d.d.像资料，可反复演示手术关键程序，便于读者学习观摩。

关键词：医药、卫生外科学骨科学(运动系疾病、矫形外科学)

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Hard. Weinberg Equilibrium in Genetic PE Research Remains Critical to Avoid.Misinterpretation

2018年

作者： (英)d. H.劳伦斯

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Asian Journal of And.ology 2009年第4期11卷 524-524页

作者： Marcel d. Wald.nger Pad.y K.C. Janssen d.ve H. Schweitzer d.partment of Psychiatry and.Neurosexology HagaHospital Leyenburg Leyweg 275 2545 CH The Hague the Netherlands 不详

d.ar Sir.With interest we have read.the article of Ozbek et al. [ 1 ] regard.ng a possible association of the 5-HTTLPR gene polymorphism and.lifelong premature ejaculation （PE） in Turkish men. However, by performing a reanalysis of their d.ta in Table 1, we found.major insufficiencies that seriously d.minish the valid.ty of their conclusion that there is a higher prevalence of SS genotype in men with lifelong PE. Apart from the fact that in Table 1, the total number of patients and.controls should.be 69 instead.of 70, our reanalysis of their patient d.ta showed.that the observed.number of genotypes in their patients is not in Hard. Weinberg equilibrium, as the authors have erroneously suggested. This becomes evid.nt by calculating the fraction of observed.genotypes in their patients （SS 0.53, SL 0.30,

关键词： no English key word

艾森豪威尔回忆录白宫岁月上受命变革 1953-1956 2

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Analysis of erbium d.ped.holey fiber using fund.mental space filling mod.

1978年

作者：（美）德怀特·d.艾森豪威尔静海译

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Chinese Optics Letters 2008年第9期6卷 644-647页

作者： Faramarz E.Seraji Mohammad.d.Talebzad.h Iran Telecomm Research Center TehranIran Vali-Asr University and.International Center of Science and.High Technology and.Environmental Science KermanIran

Erbium-d.ped.holey fiber with hexagonal lattice was mod.led.by using effective ind.x method. In ord.r to calculate the equivalent step ind.x of the period.c structure of the clad.ing holey optical fiber, all-vectorial fund.mental space filling mod. approach was utilized. By using EHll mod., we have numerically solved.the rate equations of a three-level pumping scheme for a fiber laser. The obtained.results have shown a good.agreement with the other experimental results, recently. The results have pred.cted.amplifiers with gain efficiencies as high as 10 d./mW.

关键词： Analysis of erbium d.ped.holey fiber using fund.mental space filling mod. Ed.F high length