A study of tachykinin-immunoreactivity in the cat visual cortex

The localization of tachykinin-immunoreactivity in the cat visual cortex (area 17) was investigated using immunohistochemical methods. Strong laminar specificity was observed, with immunoreactivity highest in layer V, followed by layers I, VI, II and III, and the lowest density in layer IV. Most of the immunoreactive product was localized in neuronal processes. A few immunopositive cell bodies were also present. The immunopositive neurons were non-pyramidal, multipolar, or bipolar in shape, and mostly found in layer V. There were particularly dense immunopositive fibers and varicosities around somata in layer V. These may represent tachykinin-containing presynaptic terminals (boutons). The results provide anatomical evidence that tachykinin may primarily affect layer V neurons in the cat visual cortex.     

两种根管弯曲度测量法间数学关系的推导

目的:研究2种根管弯曲度测量法测值(Schneider法的测值为θS,Weine法的测值为θW)间的数学关系。方法:将弯曲根管长轴简化为依次由相切的线段(长度为l1)、圆弧(半径为r、圆心角为θ)、线段(长度为l2)组成的连线,根据2测量法确定简化弯曲根管长轴测量角时不同的定点、连线方式,推导θS、θW间的函数方程以及与l1、l2、r、θ间的数学关系,分析方程与函数图形的特征。结果:θS与θW间存在以下数学关系:(1)tanθS=(1-cosθW ksinθW)/(sinθW kcosθW),k=l2/r;(2)θW/2≤θS≤θW。k取不同值时函数曲线的形态具有不同的特点。θW在0,π的区间内,θS与θW间呈近似的线性关系;k越大,θS越接近θW,k越小,θS越接近θW/2。结论:Schneider法与Weine法测值间存在着复杂的函数关系,根管根尖部直段的长度(l2)与弯曲段曲率半径(r)之比值是影响2种方法测值间差异的重要因素。     

Induction of FMLP-mediated calcium mobilization requires crosslinking of surface immunoglobulin in Daudi cells.

We have explored the requirements for the induction of the N-formyl-methionyl-leucyl-phenylalanine (FMLP) response in Daudi cells after anti-immunoglobulin treatment. Our results indicate that (a) induction of responsiveness to FMLP was observed in Daudi only after crosslinking of surface immunoglobulin by anti-immunoglobulin; (b) this induced responsiveness was not observed in Ramos or Wil-2 cells; (c) the F(ab')2 fragment was sufficient for the induction of the FMLP response, but the Fab fragment and the Fc fragment were ineffective; (d) of the many agents active in B lymphocyte regulation which were tested, none were as effective as anti-immunoglobulin in the induction of the FMLP response; and (e) three inhibitors of calcium mobilization (W-7 (N-(6-aminohexyl)-5-chloro-1-naphthalene sulfonamide), PMA (phorbol 12-myristate 13-acetate), and colchicine), acting on distinct mechanisms, inhibited both the calcium mobilization due to anti-immunoglobulin and the induction of responsiveness to FMLP. Our results suggest important determinants in the induction of a calcium-mobilizing FMLP response in cells of B lymphocyte lineage include (a) the cell type, (b) a selective requirement for activation via surface immunoglobulin, and (c) crosslinking of the surface immunoglobulin.     

国人新生儿心脏的解剖学研究

本文对已固定的50例(男30.女20)新生儿心脏外径、重量、体积、内部结构等进行了观测,取得了有关心脏的大量数据,为年龄解剖学和临床提供资料。     

应用单克隆抗体(MoAb)对白血病免疫分型的临床研究

报告了应用单克隆抗体对25例淋巴细胞白血病、5例慢性粒细胞白血病及15例急性非淋巴细胞白血病进行免疫分型并与AB分型作比较,结果提示免疫分型可以弥补FAB分型的不足,它有助于白血病临床诊断、鉴别诊断、指导治疗和判断预后。     

膀胱全切非管状乙状结肠膀胱成形术（附六例报告）

对６例多发性浸润性膀胱癌而膀胱颈部及尿道无侵犯的患者在膀胱前列腺全切后以非管状乙状结肠原位代膀胱。经３～２５个月的随访，除１例仍有轻度尿失禁伴轻度排尿困难外，余５例手术后６个月以上者非管状乙状结肠膀胱容量大、压力低，经尿道排尿、排空完全、自控性好，无全身营养障碍及水电酸碱紊乱，节省肠管，手术简便。     

关于口腔医学多媒体及网络教学实验效果的分析

采用比较研究的方法进行了口腔医学多媒体及网络教学实验，旨在观察比较网络教学环境、多媒体课件演示以及传统教师讲授等多种教学方式的教学效果，分析传统教学与网络教学模式下的教学环节、教学效果以及存在问题，对课件进行总体评价，对影响因素进行分析，对多媒体及网络教学模式作一初步的实践和探索。     

培养更多高质量的妇产科医师

1955年我毕业于同济医学院，留校工作至今已52年，一直从事医疗工作。师承全国著名的金问淇教授和蔡桂茹教授，金教授的广博学识和敏锐思维；蔡教授的精湛医疗水平和技术，对我的从医的道路有很大的影响。目睹同辈或下一代很多优秀的妇产科医师的成长、发展过程直到取得杰出业绩，会经常思考“如何做好妇产科医师”这一问题。     

Althin/TIAN System1000 HDF血透机常见故障及检修

Althin／TIAN System1000 HDF血透机是美国Baxter公司较为先进的血液透析滤过装置。它采用的是平恒腔式的定容超滤控制系统．使得超滤量的控制更为精确。非在线式血液滤过的设计彻底保证了滤过液的安全性。人性化的液晶触摸屏给操作和维修带来及大的方便。由于血透机特殊的工作环境．年久的机器会出现一些问题。现将几例常见故障的检修提供给同行，供同行参考。