肝移植术后胆道并发症的影响因素及干预措施
近年来原位肝移植(Orthotopic liver transplantation)已发展成为当今治疗终末期肝病惟一有效的方法,但移植后胆道并发症的发生,则严重影响患者的生活质量,成为手术失败的主要原因之一.其发生原因包括缺血-再灌注损伤、免疫排斥、吻合口狭窄等,针对其发生的机制,我们可以采取相应的预防及治疗措施.现就肝移植后胆道并发症的发生及诊治进展进行综述。
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Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
We predict that graphene is a unique system where disorder-assisted scattering (supercollisions) dominates electron-lattice cooling over a wide range of temperatures, up to room temperature. This is so because for momentum-conserving electron-phonon scattering the energy transfer per collision is severely constrained…
Flame Synthesis of Graphene Films in Open Environments
Few-layer graphene (FLG) is grown on copper and nickel substrates at high rates using a novel flame synthesis method in open-atmosphere environments. Transmittance and resistance properties of the transferred films are similar to those grown by other methods, but the concentration of oxygen, as assessed by XPS, is act…
Stochastic self-assembly of incommensurate clusters
We examine the classic problem of homogeneous nucleation and growth by deriving and analyzing a fully discrete stochastic master equation. Upon comparison with results obtained from the corresponding mean-field Becker-Döring equations we find striking differences between the two corresponding equilibrium mean cluster…
Recycling Mimeograph-Printed Newsprint Paper
Virgin newsprint paper from thermo-mechanical pulp was subjected to a laboratory recycling scheme, which involved mimeograph-printing, re-pulping, de-inking, washing, refining, and handsheetforming, without adding other fibre in between cycles. Fibre dimension, pulp freeness and paper properties were determined after…
A one-way coupled, Euler-Lagrangian simulation of bubble coalescence in a turbulent pipe flow
A bubble coalescence model is developed using an Euler–Lagrangian approach for unstructured grids. The Eulerian carrier fluid is solved using large-eddy simulation (LES) and the Lagrangian particle motion is solved with equations relating the turbulent motion of the carrier fluid to forces on each discrete bubble. The…
A New Brazilian Friction-Resistant Low Alloy High Strength Steel – A Life Testing Approach
In this paper we will develop a sequential life test approach applied to a modified low alloy-high strength steel part used in highway overpasses in Brazil.We will consider two possible underlying sampling distributions: the Normal and theInverse Weibull models. The minimum life will be considered equal to zero. We wi…
Inhibitory Effect of Bmi-1 Knockdown on Growth of Human SO-RB_(50) Cells In Vitro
【Objective】 To investigate the effect of Bmi-1 gene knockdown on the proliferation and apoptosis in human SO-RB50 cells.【Methods】 Bmi-1 expression was examined in human retinoblastoma tissue and SO-RB50 cells by immunohistochemistry and RT-PCR.Chemically synthesized Bmi-1 siRNA was transfected into SO-RB50 cells.After…
羟丙基-β-环糊精包合甲氧苄啶的研究
为了研究甲氧苄啶（Trimethoprim,TMP）与羟丙基-β-环糊精（HP-β-CD）在水溶液中的包合作用、包合过程中的热力学参数变化及包合比,试验分别采用相溶解度法、等摩尔系列法、摩尔比率法测定了TMP与HP-β-CD的包合表观常数、包合过程的熵变、焓变、自由能变化及包合比。结果表明,在不同温度下,TMP与HP-β-CD在水溶液中均可形成1∶1摩尔比的包合物,相溶解度图呈AL型;TMP与HP-β-CD的包合过程可自发进行（△G〈0）,且为放热反应（△H〈0）,同时也是熵值增大的过程（△S〉0）;说明TMP与HP-β-CD在水溶液中均可自发形成1∶1摩尔比的包合物,从而增加其溶解度。选择适宜的包合温度将有利于包合过程的进行。
酸析-混凝-微电解组合工艺预处理精制棉黑液研究
采用酸析-混凝-微电解组合工艺预处理精制棉黑液，研究pH对处理效果的影响。采用紫外-可见分光光度法和急性毒性试验研究组合工艺对精制棉黑液成分变化的影响。结果表明，各阶段最佳pH条件为：酸析pH=2；混凝pH=12；微电解pH=4～5。通过组合工艺预处理，精制棉黑液的COD由5400mg／L降至1900mg／L，去除率为65％；BOD5由2860mg／L降至1080mg／L，去除率为62％；TOC由2080mg／L降至906mg／L，去除率为56％；黑液色度由原水的4500降至50，去除率为99％；50％抑光率稀释比（LIR50）由250降至17，急性毒性降低93％；紫外可见吸收光谱结果显示，部分含共轭双键和苯环的难生化降解物质得到…
Effect of Nano-Size Al2O3 and Elemental Ca Addition on the Microstructural and Mechanical Properties of AZ41 Magnesium Alloy
Abstract Light weight structural materials are in high demand these days due to the limited oil and gas reserves and global inclination to reduce the green house gas (CO 2 ) emission. Magnesium based materials are the lightest engineering materials in the earth. Magnesium alloys that contain aluminium and zinc are kno…
Fischer-Tropsch Synthesis: Co turnover Frequency Rates over Co/Al2O3Catalysts with Different Reduction Promoters
Abstract Cobalt (Co) turnover frequency (TOF) has been reported to be independent of Co dispersion and support type. However, wide discrepancies in Co TOF values exist in the literature. Differences in catalyst preparation, process conditions, and characterization technique could be major factors that may account for…
Highly Efficient Organic Photosensitizer with Dinaphthylphenylamine Unit as a Donor for DSSCs
E-mail: chk@inha.ac.krReceived August 29, 2011, Accepted September 19, 2011Key Words : DSSCs, Dye-sensitized solar cells, High efficiency, DinaphthylphenylamineRecently, dye-sensitized solar cells (DSSCs) have at-tracted great attention because they have advantages inconverting solar energy to electrical energy at low…
Hydrotalcites: High Pressure and High Temperature CO2 Adsorption
Abstract The use of promising solid-state adsorbents is an emerging field in carbon dioxide capture and storage (CCS) owing to their promising sorption capacity and facile regeneration behaviour. Hydrotalcites, a class of layered double hydroxides (LDHs), are specifically suitable for high capacity CO 2 sorption studi…
Mechanistic Release Study of Water Soluble Drugs from Poly (Dimethylsiloxanes) Elastomeric Matrices
Abstract Introduction: Controlled drug release from implantable silicone elastomers was reported to occur mainly via the osmotic rupture release mechanism. In this work, we are attempting to determine the effects of drug volumetric loading, particle size, device shape, and dissolution media on the release rate of the…
Elevated Myocardial Na+/H+ Exchanger Isoform 1 Induces Cardiac Hypertrophy and the Upregulation of Osteopontin Gene Expression
Abstract Cardiac hypertrophy (CH), a prominent feature that predisposes the heart to failure, is associated with the activation of multiple molecular and cellular changes in the circulation and heart. The Na+/H+ exchanger isoform 1 (NHE1) has been implicated in the development and progression of CH. To better understa…
Phase Equilibrium and Calorimetric Properties of Mixtures Using the Mattedi-Tavares-Castier Equation of State
Abstract Natural gas and oil processing, among many other applications in the chemical industry, depends on accurate predictions of the thermodynamic and transport properties for their accurate and reliable design. Especially in the energy sector, in which the flow rates of process streams are large and equipment is b…
Nanotechnology for Pollution Reduction
Abstract Nanotechnology is regarded as the next great scientific/industrial revolution due to the possibility of designing nanostructured materials that possess novel electronic, optical, magnetic, and catalytic properties. Nanomaterials could potentially be applied in pollution control, catalysis, water remediation,…
Variegated Gene Activation and Stochastic Odorant Receptor Choice
Abstract Each olfactory sensory neuron in the mammalian nose selects just a single member of the large odorant receptor (OR) gene family. The core processes regulating OR selection may involve mechanisms that limit initial OR transcription and once a single OR is chosen, repress subsequent activations. We have used a…
陈化过程中湿度、温度及时间对Nd:YAG纳米粉体的影响
采用微波辅助均相沉淀法制备了Nd:YAG(Nd:Y 3 Al 5 O 12 )纳米粉体. 通过XRD和SEM对此方法制备的Nd:YAG纳米粉体进行了分析表征, 并分析了在陈化过程中, 湿度、温度和陈化时间对制备Nd:YAG纳米粉体的影响. 实验结果表明: 陈化环境的湿度、温度和陈化时间对制备Nd:YAG纳米粉体的组分和形貌有显著的影响. 陈化环境中湿度和温度对Nd:YAG纳米粉体的影响具有一定的依存关系, 必须适当地控制; 陈化时间对Nd:YAG纳米粉体的粒径大小影响显著, 随着陈化时间的延长, 获得的Nd:YAG纳米粉体的颗粒尺寸先减小后增大.