Phase-Field-Based Axisymmetric Lattice Boltzmann Method for Two-Phase Electro-Hydrodynamic Flows

In this work, a novel and simple phase-field-based lattice Boltzmann (LB) method is proposed for the axisymmetric two-phase electro-hydrodynamic flows. The present LB method is composed of three LB models, which are used to solve the axisymmetric Allen-Cahn equation for the phase field, the axisymmetric Poisson equation for the electric potential, and the axisymmetric Navier-Stokes equations for the flow field. Compared with the previous LB models for the axisymmetric Poisson equation, which can be viewed as the solvers to the convection-diffusion equation, the present model is a genuine solver to the axisymmetric Poisson equation. To test the capacity of the LB method, the deformation of a single leaky or perfect dielectric drop under a uniform electric field is considered, and the effects of electric strength, conductivity ratio, and permittivity ratio are investigated in detail. It is found that the present numerical results are in good agreement with some available theoretical, numerical and/or experimental data.     

丝光沸石催化剂上正己烷异构化反应机理

以轻质烷烃异构化中试放大用的丝光沸石催化剂为研究对象,运用“原位”红外反应技术和催化剂活性评价手段,并结合反应动力学参数计算,探讨了正已烷异构化反应机理。结果表明,可用五配位反应中间物种机理解释正碳离子的生成。用双分子六元环反应中间物机理能较好地解释正已烷在氢型丝光沸石(HM)上的异构化过程。对正已烷在Pd/HM上的反应过程也可用正碳离子机理结合双分子六元环中间物机理解释。     

胸导管结扎预防食管癌术后乳糜胸的临床研究

目的　寻找减少或消除食管癌切除术后乳糜胸发生率的有效方法。方法　随机选取 45例 (A组 )食管癌患者 ,在食管癌切除加胃 食管残端吻合时 ,一期行预防性低位胸导管结扎术 (第 8胸椎水平以下 ) ;另 92例 (B组 )作对照组 ,仅做食管癌切除加胃 -食管残端吻合术。结果　两组患者在术后乳糜胸发生率 (A :1/ 45 ;B :9/ 92 ,P =0 0 3)、术后 48h胸腔引流量〔第 1个 2 4h :A :(2 5 4 33± 45 15 )ml,B :(4 93 6 1± 76 6 7)ml;第 2个 2 4h :A :(141 11± 2 5 5 3)ml,B :(32 3 39± 5 8 17)ml;P <0 0 5 )〕、3天内拨管率 (A :94 78% ;B :6 2 2 1% ,P =0 0 0 1)、并发症 (A :3/ 45 ,B :0 / 92 ,P =0 0 34)以及随访锁骨上淋巴结转移 (A :0 / 45 ,B :9/ 92 ,P =0 0 3)等方面有统计学意义。结论　术中行预防性低位胸导管结扎术可明显减少甚至消除食管癌患者术后乳糜胸的发生。     

COEXISTENCE OF OSTEOARTHRITIS AND OSTEOPOROSIS INFEMORAL HEAD: A SCANNING ELECTRONMICROSCOPIC STUDY

ffeSUtn6 Objectif Detenniner ie cusistence d' ostdoarthrite et d' ostdope dans la tste du femur. liChen 12 femmes (age moron 56 ans )atteintes d' ortdoorthrite de la hanche, on a Prdlevd la tste du femur durant la substitutiontotale de l' articulation de leur hanche. APrds das traitements, Ies tstes du femur furent studioes sons ie microscope dlectroniqued belang (soon ). ~flats to lesions ostdcorthritiques de differents degrds (azractdrithe per ba digs~nce du cartilage articulaire et d' hyp…     

Porosity and accuracy of multiple-unit titanium castings

The objective of this investigation was to determine whether titanium could be used to cast reproducible multiple-unit dental restorations. A metal analog was machined to simulate preparations for a three-unit fixed partial denture. Castings were made with four different sprue designs at three temperatures. Marginal accuracy and porosity were evaluated. A total of 70 titanium castings were made with an argon/electric arc/vacuum/pressure casting machine. Ten castings were made in the conventional manner by use of gold-palladium alloy as a control to compare the marginal gap. The results revealed that the porosity was less when a large individual sprue (6-gauge) was used. It was also noted that the lower pattern burnout temperatures of 910 degrees C and 920 degrees C exhibited significantly smaller marginal gaps than did the higher temperature of 930 degrees C.     

分泌性中耳炎对内耳听觉功能的影响

为了解分泌性中耳炎（ Ｏ Ｍ Ｅ）对内耳听觉功能的影响,对 Ｏ Ｍ Ｅ２２０ 例、３０４ 耳分别进行纯音测听及声阻抗测定。结果表明,部分 Ｏ Ｍ Ｅ 患者骨导听阈升高,除造成传音性耳聋外,合并感音性耳聋（ Ｓ Ｎ Ｈ Ｌ）为３１８％ ,并随着病程延长, Ｓ Ｎ Ｈ Ｌ 发病率增高。提示应积极有效地治疗本病,应用扩血管及营养神经药物可防治 Ｓ Ｎ Ｈ Ｌ的发生。     

蝶腭,筛前神经及鼻甲联合手术治疗常年性变应性鼻炎

在鼻内窥镜下为４０例行蝶腭、筛前神经及鼻甲联合手术治疗常年性变应性鼻炎。结果：术后１月全部患者症状消失,显效１００％;术后１年显效３３例,占８２．５％;有效６例,占１５％,有效率为９７．５％。提示该方法可广泛阻滞鼻腔副交感神经来源,降低鼻粘膜感觉灵敏部位敏感性以及感觉—副交感神经反射,破坏喷嚏反射弧的传入通路,使鼻粘膜对外界刺激敏感性下降,血管扩张减轻,腺体分泌减少,对常年性变应性鼻炎有明显疗效。     

脓毒症中骨骼肌有氧糖酵解增强与细胞Na+、K+、ATP酶活性改变间的关系

目的:观察和分析细胞膜有关的能量代谢状态改变对正常及脓毒症大鼠的不同类型骨骼肌乳酸产生量的影响.方法:借助大鼠脓毒症模型,建立伸趾长肌和比目鱼肌的充分供氧离体孵育系统,利用特异性Na+、K+、ATP酶抑制剂--哇巴因,干预细胞膜钠钾泵的活性,采用NADH荧光探针方法,检测骨骼肌组织细胞乳酸的产生量及其变化.结果:①应用哇巴因可显著降低正常及脓毒症大鼠肌肉组织的乳酸产生量;②哇巴因对伸趾长肌有氧糖酵解过程的抑制作用较比目鱼肌更为明显.结论:在正常和脓毒症情况下,肌肉组织细胞有关功能活动的增强而导致的Na+、K+、ATP酶活性升高是其乳酸产生增加的重要原因.     

血清Ⅳ型胶原测定在肾移植中的意义

目的：探讨血清Ⅳ型胶原（Ⅳ－Ｃ）动态变化在肾移植术后监测中的意义。方法：检测６１例肾移植患者血清Ⅳ－Ｃ浓度,观察不同病情状况时血清Ⅳ－Ｃ浓度的改变。结果显示：肾移植术前及术后动态测定血清Ⅳ－Ｃ浓度有助于早期诊断和鉴别诊断急性排斥反应（ＡＲ）、急性肾小管坏死（ＡＴＮ）和感染,可作为肾移植监测的一个辅助指标。     

Preliminary result of mixed bacterial vaccine as adjuvant treatment of hepatocellular carcinoma.

Mixed bacterial vaccine (MBV) was employed in the multi-modality treatment of hepatocellular carcinoma (HCC) during 1985-1988. Thirty eight patients undergoing palliative resection and cisplatin therapy (Series 1) and 48 patients with unresectable HCC who received hepatic artery ligation + intraarterial cisplatin infusion + radiotherapy (Series 2) were randomized to receive MBV or not. In series 1, the 1- and 2-year survival rates of MBV group and control were 75% vs 58% (P = 0.19) and 45% vs 39% (P = 0.23). In series 2, the 1-, 2- and 3-year survival rates were 59%, 41% and 41% for MBV group and 39%, 25% and 20% for the control, respectively (P1 = 0.07, P2 = 0.09, P3 = 0.07). In addition, MBV improved the "second look" resection rate to 40% as compared to 17% in the control (P greater than 0.05). MBV could also prevent such immunosuppression as decrease of macrophage activity caused by radiotherapy. We consider MBV a potential nonspecific immunostimulant in the multimodality treatment of HCC.