热循环过程铁铬铝合金中α＇相沉淀

通过１２００℃缓冷至室温热循环过程，由于铬组元非平衡偏聚，加快铬在Ｆｅ２５Ｃｒ５Ａｌ合金中向晶界扩散，并产生富铬的α＇相沿晶及晶内沉淀；相变导致合金脆化，在晶界可观察到微米级α＇相，并产生穿晶解理断裂失效破坏。     

赋权图的区间着色和图的着色算法

本文提出了图的区间着色模型,并对相容性图给出了区间着色的多项式算法,同时改进了求图的着色问题的算法。     

水分对头孢唑林钠药效的影响初探

用平衡湿度法测定了头孢唑林钠的临界相对湿度，在２０℃时约为６７％。同时，通过破坏性实验考察了水分对其药效的影响，初步结果表明，水分每增加１％，效价降低约０．５％。据此，提出了分装操作的若干注意事项。     

一种值得推广的COD分析方法

该COD分析法用以测定水中有机物浓度,其基本原理与标准分析法基本相同,但对分析设备及方法作了一些改进——在一多孔铝板上插入6—25个带盖的试管,试管内加入水样5毫升,消化液3毫升和硫酸/硫酸银混合液7毫升,在铝板下加热至150℃,2小时后冷却并在原试管滴定——这样,可同时分析多个水样,且具有精确、简便、安全、省时、省药等优点,值得推广。     

Purification of the glutamate decarboxylase from human brain]

A method of purifying the glutamate decarboxylase from human brain is described. The enzyme was purified 8 000 fold in regard to the initial homogenate and appears homogenous by electrophoresis, both in denaturing and non-denaturing conditions. The molecular weight of the native enzyme and its subunits indicate that GAD from human brain is formed by two similar if non identical polypeptide chains. The Km for glutamate and pyridoxal phosphate found for the human enzyme, respectively 1,2.10(-3) M and 0,13.10(-6) M, are close to the Km found for the Mouse enzyme.     

Particle methods for multiscale simulation of complex flows

The multi-scale structures of complex flows have been great challenges to both theoretical and engineering researches, and multi-scale modeling is the natural way in response. Particle methods (PMs) are ideal constitutors and powerful probes of multi-scale models, owing to their physical insight and computational simplicity. In this paper, the role of different PMs for multi-scale modeling of complex flows is critically reviewed and possible development of PMs in this background is prospected, with the emphasis on pseudo-particle modeling (PPM). The performances of some different PMs are compared in simulations and new development in the fundamentals and applications of PPM is also reported, demonstrating PPM as a unique PM for multi-scale modeling.     

The effects of intraperitoneal adaptation to histamine on the anaphylactic shock in the guinea-pig

Résumé Les cobayes adaptés à l'histamine par voie intrapéritonéale sont protégés contre le choc anaphylactique. Les mécanismes périphériques de la résistance sont discutés.     

锻锤锤杆折断修理新方法

本文就目前国内一般锻锤杆折断只能重新更换这一现状,分析了锤杆发生折断的原因,提出了成本较低,修复期短的旧锤杆修复再用的方法。     

核反应堆不同温度流体热混合的机理及实验研究

探讨了在核反应堆热工流体力学中具有普遍意义的不同温度流体达到热混合均匀状态的过程和机理。１０ＭＷ高温气冷实验堆（ＨＴＲ－１０）热气导管内的流体热混合主要是径向对流扩散过程。用流体温度空间分布的方差表示混合效果，通过雷诺比拟方法求得在点热源下游流动流体的径向扩散系数解析解，与在模拟热气导管内的点热源下游流动流体的扩散混合实验的结果相符合。在雷诺数Ｒｅ为（１．００～３．５０）×１０５范围内，径向湍动系数εｒ的相应范围是（１．００～４．００）×１０－３ｍ２／ｓ。反映混合效果的湍动系数与流速ｕ之比εｒ／ｕ随雷诺数Ｒｅ变化不大，解释了在高温堆堆芯底部结构中Ｒｅ对流体混合效果影响不大的现象。