用MCT冷喂料挤出机连续制备混炼胶工艺分析

实例分析采用多流道传递式（ＭＣＴ）混炼冷喂料挤出机连续制备混炼胶的工艺条件及特性。指出低置螺杆传递混合区的温度，提高背压及提高螺杆转速时，机器工艺性能优良，产量大，混炼塑化效果好。     

MOS控制晶闸管的最大可关断电流

建立了MOS控制晶闸管最大可关断电流的解析关系式 .在该关系式中 ,关断电流只与晶闸管中耦合晶体管的电流放大系数及晶闸管射极短路电流有关 .另外 ,基于MOS控制晶闸管的仿真模型 ,模拟分析了最大可关断电流与它们间的关系 .解析与模拟分析结果符合较好 .结果表明 ,耦合晶体管电流放大系数及晶闸管射极短路电流的设计决定了器件的最大可关断电流 .     

基于MCT运动控制器的快速成型机数控系统研究

数控系统的合理性和可靠性是保证机床加工精度和稳定性的前提，快速成形是一种基于离散／堆积成型的快速制造工艺，对数控系统体系结构和软件有着特殊的要求。剖析了快速成形的工艺特点，提出以国产新型MCT运动控制器为控制系统核心、工业控制机为系统支撑单元的双CPU开放式数控系统，并介绍了该数控系统的功能和硬件、软件实现方法。通过该数控系统在快速成形机上的应用证明，该系统满足了快速成形技术对数控系统的要求。     

碲镉汞外延晶膜的输运特性

反常霍尔效应是在检测碲镉汞（ＭＣＴ）薄膜的电学性质时的一种常见现象，反常的根本原理是由于材料的不均匀。本文着讨论ＭＣＴ外延膜的电学参数的种种不均匀引起不同的电磁输运特性。     

Lactate Suppresses Retroviral Transduction in Cervical Epithelial Cells through DNA-PKcs Modulation

Recently, we have shown the molecular basis for lactate sensing by cervical epithelial cells resulting in enhanced DNA repair processes through DNA-PKcs regulation. Interestingly, DNA-PKcs is indispensable for proper retroviral DNA integration in the cell host genome. According to recent findings, the mucosal epithelium can be efficiently transduced by retroviruses and play a pivotal role in regulating viral release by cervical epithelial cells. This study examined the effects of lactate on lentiviral transduction in cervical cancer cells (HeLa, CaSki, and C33A) and model glioma cell lines (DNA-PKcs proficient and deficient). Our study showed that L- and D-lactate enhanced DNA-PKcs presence in nuclear compartments by between 38 and 63%, which corresponded with decreased lentiviral transduction rates by between 15 and 36%. Changes in DNA-PKcs expression or its inhibition with NU7441 also greatly affected lentiviral transduction efficacy. The stimulation of cells with either HCA1 agonist 3,5-DHBA or HDAC inhibitor sodium butyrate mimicked, in part, the effects of L-lactate. The inhibition of lactate flux by BAY-8002 enhanced DNA-PKcs nuclear localization which translated into diminished lentiviral transduction efficacy. Our study suggests that L- and D-lactate present in the uterine cervix may play a role in the mitigation of viral integration in cervical epithelium and, thus, restrict the viral oncogenic and/or cytopathic potential.     

Atmospheric plasma‐aided biocidal finishes for nonwoven polypropylene fabrics. II. Functionality of synthesized fabrics

Atmospheric plasma‐aided graft copolymerization of textile materials provides single or multiple functionality polypropylene (PP) modified fabrics. Biocidal PP's are modified ones to kill or inhibit the growth of microorganisms such as bacteria, molds, and fungi, and insect and tick repelling action. Novel PP biocidal fabrics synthesized by graft copolymerization using plasma‐aided technique (see part I of this study) using antibacterial and insect repellent agents have been tested and evaluated and proved to be antimicrobial, tick repellent, and antistatic. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1911–1917, 2007     

基于OrCAD／PSpice的MCT仿真研究

MCT是一种新型的电力电子开关器件,本文利用PSpice中的器件模型和电路模型建立了一个MCT的组合模型,并用多瞬态分析法提取了该模型的参数。文中还用该模型进行了MCT开关特性的仿真试验,将仿真的结果与实际的MCT的开关试验的结果相对照,两者基本相符。     

微波消解-ICP-MS法测定中链甘油三酸酯中铜、铅、铬、镍、锡

为满足国家药品安全的限量要求,采用微波消解法对中链甘油三酸酯（MCT）进行前处理,建立了电感耦合等离子体质谱（ICP-MS）测定MCT中痕量有害元素铜、铅、铬、镍、锡的方法,并对测定条件进行了优化。结果表明：各元素在0～30 μg/L范围内线性良好,相关系数r在0.999 4～0.999 9之间,方法检出限为0.013～0.057 μg/kg,相对标准偏差为1.2%～6.7%;对各元素进行3个不同浓度水平下的加标回收率实验,平均回收率为94.0%～110.0%。使用该方法测定国家标准物质鸡肉GBW10018中的痕量有害元素,测定结果与标准值无显著差异。     

Determination of individual layer composition and thickness in multilayer HgCdTe structures

The reproducible molecular-beam epitaxy (MBE) growth of dual-band Hg_1−xCd_xTe (MCT) heterostructures requires routine post-growth wafer analysis for constituent layer thickness and alloy composition, therefore, demanding nondestructive characterization techniques that offer quick data feedback. This paper reports a multilayer structure model, which can be least-square fit directly to either Fourier transform infrared (FTIR) transmission or reflection spectra to provide individual layer thickness, alloy composition, and grading information for various complex structures. The model, we developed, is based on an accurate representation of both the real and imaginary parts of the MCT dielectric function across and above E _g as a function of alloy composition. The parametric, MCT optical-dielectric function for compositions varying between x=0.17 to x=0.5 was developed in the range from 400 cm⁻¹ to 4,000 cm⁻¹, based on a semi-empirical model for the absorption coefficient and extrapolation of the refractive index across E _g . The model parameters were refined through simultaneous fits to multiple reflection and transmission data sets from as-grown, double-layer planar heterostructure (DLPH) structures of variable thickness. The multilayer model was tested on a variety of simple DLPH structures with thick absorber layers (>8 μm) and was compared against traditional FTIR analysis and cross-section optical microscopy and showed good agreement in both composition and thickness. Model fits to dual-color MCT data and subsequent analysis of the internal parameter correlation have demonstrated that error bars on absorber layer composition and thickness could be as low as ∼0.0005 and ∼0.02 μm, correspondingly.