胆囊癌组织中P21、P53、BCL—2癌基因蛋白的表达及PCNA半定量分析

采用免疫组织化学 Ａ Ｂ Ｃ 法,测定了４０ 例胆囊癌和８ 例胆囊腺瘤性息肉组织中 Ｐ２１ 、 Ｐ５３ 、 Ｂ Ｃ Ｌ－ ２ 癌基因蛋白的表达情况及增殖细胞核抗原的表达强度．结果显示： Ｐ２１ 、 Ｐ５３ 、 Ｂ Ｃ Ｌ－２ 蛋白阳性表达率在胆囊癌组织中分别为５２ ．５ ％ 、５２ ．５ ％ 和７０ ％ ．在胆囊腺瘤性息肉中分别为０ ％ 、０ ％ 和１００ ％ ．提示：检测 Ｐ２１ 、 Ｐ５３ 、 Ｂ Ｃ Ｌ－ ２ 蛋白表达情况对胆囊癌与胆囊腺瘤性息肉的鉴别诊断有一定意义; Ｐ２１ 、 Ｐ５３ 蛋白表达可能是胆囊癌预后不良的重要指标     

直流偏磁场对三类硬磁畴畴壁长度的影响

在不同的直流偏磁场Ｈｂ下,测量了石榴石磁泡膜中三类硬磁畴长度（Ｌ）、宽度（Ｗ）和泡径（ｄ）．从而得到Ｌ、Ｗ和ｄ随Ｈｂ变化的曲线．结果表明,三类硬磁畴的畴壁长度都随Ｈｂ的增加而缩短．这些实验结果可为进一步的理论探讨提供实验依据     

The chemokine receptor CCR4 in vascular recognition by cutaneous but not intestinal memory T cells.

Lymphocytes that are responsible for regional (tissue-specific) immunity home from the blood to the intestines, inflamed skin or other sites through a multistep process involving recognition of vascular endothelial cells and extravasation. Chemoattractant cytokine molecules known as chemokines regulate this lymphocyte traffic, in part by triggering arrest (stopping) of lymphocytes rolling on endothelium. Here we show that many systemic memory T cells in blood carry the chemokine receptor CCR4 and therefore respond to its ligands, the chemokines TARC and MDC. These cells include essentially all skin-homing cells expressing the cutaneous lymphocyte antigen and a subset of other systemic memory lymphocytes; however, intestinal (alpha4beta7+) memory and naive T cells respond poorly. Immunohistochemistry reveals anti-TARC reactivity of venules and infiltration of many CCR4+ lymphocytes in chronically inflamed skin, but not in the gastrointestinal lamina propria. Moreover, TARC induces integrin-dependent adhesion of skin (but not intestinal) memory T cells to the cell-adhesion molecule ICAM-1, and causes their rapid arrest under physiological flow. Our results suggest that CCR4 and TARC are important in the recognition of skin vasculature by circulating T cells and in directing lymphocytes that are involved in systemic as opposed to intestinal immunity to their target tissues.     

汽车二维图像的分类识别研究

用自相关函数提取图像的特征,对三类小汽车模型的侧影进行了分类识别研究．给出了两种分类识别方法：加权ｋ－近邻分类法和ＢＰ网络分类法,并对两种分类方法的性能进行了分析．实验结果说明,识别效果较好     

The Study for the Reinforced Composites of Textile Gradient Structure

Based on references, this paper further develops the composites of textile gradient structure, tests and analyses the mechanical properties of composites of gradient struture, moreover, makes a comparison between composites of gradient structure and common laminated composites.     

一阶时滞差分方程解的结点距离估计

讨论了一阶差分方程△x_n+P_nx_(n-k)=0的解的结点距离。     

金属爆炸焊接的原理和技术应用

本文介绍金属爆炸焊接过程中选择爆炸焊接参数的原则、试验结果与分析、爆炸焊接工艺的优点,特别对平板复合技术中采用的技术措施进行了总结和探讨,并叙述了一个铜－铝爆炸复合的实例及其应用     

异步电机的直接转矩控制及其数字仿真

本文根据直接转矩控制的原理构造了一种直接转矩控制系统,该系统在动态和稳态时采用不同的控制策略,使转矩、转速的快速性和控制精度得到满足。仿真结果证明了该方法的有效性。     

腐蚀管线剩余强度的非线性分析

应用计算机辅助工程分析系统,对腐蚀管线的剩余强度进行了有限元分析,分析中考虑了材料非线性和几何非线性。得出了腐蚀区的应力分布及腐蚀区应力随载荷变化的历程曲线,以及腐蚀区尺寸对剩余强度的影响,并对模型的失效压力进行了预测。将预测结果与工业上使用最广泛的Ｂ３１Ｇ准则预测的结果进行了比较,证明用此方法对腐蚀管线的剩余强度进行评估是可行的,能得到比较准确的结果。     

氟化石墨制备新工艺的研究

采用一种操作安全、简便的新方法－固相法工艺制得了氟化石墨,并对产品用红外光谱、Ｘ射线衍射等方法进行了测试,同时探讨了一些影响氟化石墨制备的因素。