用T-Ω法分析发电机转子三维涡流场

本文用位对Ｔ－Ω，分析导体间有接触电阻的发电机转子三维负序涡流场。文中讨论了：位对及其规范的选择、位对边值问题解的唯一性，提出了用Ｄ－Ｑ轴脉振电磁场迭加计算旋转电磁场的方法，还提出“预消去法”计算方法。     

The effect of shock on blood oxidation-reduction potential

Oxidation-reduction (redox) potential measurements were made in the blood of rabbits subjected to hemorrhagic shock followed by treatment with a mild oxidizing agent (albumin). Control redox potential reading corrected for pH was –8.8±1.3 millivolts (mV) in arterial blood (A) and –18.0±2.0 mV in venous blood (V). This A-V difference indicated that hydrogen equivalents coming from muscle and other tissues were partially consumed in the lungs. A 20-mV drop on the V and a 13 mV on the A side was seen after shock. This did not fully return to control 2 h after return of the shed blood. Infusion of 2 g of albumin/kg/h raised the V redox potential to control, but it returned to untreated levels when the albumin was discontinued. The reductive load imposed on the animal by shock appeared to be large and not readily reversed by reperfusion or by the quantity of albumin given. Thus, it may be concluded that cellular respiration had not been adequately restored. This reductive load may impede recovery by suppression of cellular respiration and other cell and organ functions.     

关于带电劈体电场的研究

用复变函数的知识给出了带电劈体的电荷分布以及与其相联系的电场分布的解析形式。并用计算机准确地描绘出劈体尖角为a=π╱20时的等位线与电力线分布。     

用电感耦合等离子光量计测定人发中微量元素

本文介绍了应用电感耦合等离子体光量计同时测定人发中13种微量元素的方法。几种主要元素变异系数<5％,回收率90.5～100％。对人发微量元素的比对测定获得满意结果。本方法用样量少(0.1g),操作快速、简便。     

Identification of a pre-hibernating state in myocardium from nonhibernating chipmunks

Summary During the hibermating season, the amplitude of the cardiac action potential plateau of nonhibernating chipmunks was reduced. Replacing external Ca by Sr inhibited the electromechanical responses of these preparations. Similar properties were observed in hibernating animal preparations, suggesting that changes in cardiac function are already triggered before hibernation begins.15 December 1986     

对自然、社会与人关系的系统考察

人类社会作为广义自然的一部分,只能在遵循自然整体运行规律的前提下存在和发展;相对于宇宙整体运行的无限造化,人类的所谓无限创造力仅仅是一个无限小量;从心理和行为的表现方面来看,成熟形态的劳动、语言和意识使人成了一个具有新质的自然存在物,使人类社会成了“人化自然”的核心部分;在人类化的各种形式中具体实现着“人同自然界的完成了的本质的统一”,无论是心理模式、心理过程还是行为模式、行为过程,或是精神产品、物质产品,它们都是人的世界对自然世界的展示,也都是自然世界在人的世界中的实现;人是一个自然与社会,生理、心理与行为的多维存在的统一;人的遗传结构中编码着两种截然不同的个体发育的信息程序：一种是保证个体最一般的基础性生理、心理和行为活动的第一维结构生成的决定论式程序;另一种是规定某些可能的生理、心理和行为的第二维结构建构的非决定论式程序;人的本质是非决定的、开放的,人只能是一种在多维的综合中生成、建构和创造着自身本质的存在。     

论"发展伦理学"的人学基础

"发展是为了人"和"以人为本"的命题是传统人道主义的命题,它不能解决我们的时代提出来的新问题.我们的时代需要一种新人道主义.它提出来的问题是"人应当是什么"的问题,这正是发展伦理学的基本问题.新人道主义实现了从"个人本位"到"类本位"、从"绝对主体意识"到"有限主体意识"、从"享乐意识"到"生存意识"、从"现世主义意识"到"未来意识"的历史性转变.     

Increased mitochondrial palmitoylcarnitine/carnitine countertransport by flavone causes oxidative stress and apoptosis in colon cancer cells

Cancer cell metabolism is characterized by limited oxidative phosphorylation in order to minimize oxidative stress. We have previously shown that the flavonoid flavone in HT-29 colon cancer cells increases the uptake of pyruvate or lactate into mitochondria, which is followed by an increase in O₂^−.. production that finally leads to apoptosis. Similarly, a supply of palmitoylcarnitine in combination with carnitine induces apoptosis in HT-29 cells by increasing the mitochondrial respiration rate. Here we show that flavone-induced apoptosis is increased more than twofold in the presence of palmitoylcarnitine due to increased mitochondrial fatty acid transport and the subsequent metabolic generation of O₂^−. in mitochondria is the initiating factor for the execution of apoptosis. Received 12 August 2005; received after revision 12 October 2005; accepted 14 October 2005