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Right heart catheterization was performed 120 times in 112 cardiac cases admitted into Chung-Shan Hospital of Shanghai First Medical College in a period of 13 months from September 1957 to September 1958. Catheterization was done in this series of cases chiefly for the purpose of studying the hemodynamic changes in the lesser circulation and as an aid to diagnosis in congenital heart diseases and rheumatic mitral valvular disease, when cardiac surgery was considered for treatment. In 8 of them catheterization... Right heart catheterization was performed 120 times in 112 cardiac cases admitted into Chung-Shan Hospital of Shanghai First Medical College in a period of 13 months from September 1957 to September 1958. Catheterization was done in this series of cases chiefly for the purpose of studying the hemodynamic changes in the lesser circulation and as an aid to diagnosis in congenital heart diseases and rheumatic mitral valvular disease, when cardiac surgery was considered for treatment. In 8 of them catheterization was repeated 6 weeks after surgical repair of an interauricular septal defect or valvotomy of a stenotic pulmonic valve. In this paper the entire procedure of catheterization has been described in detail, particuhrly with regard to some technics of manipulation of the catheter in order to let it get through the tricuspid and pulmonic orifice, and to wedge it into the "pulmonary capillary". Indications, contraindications, complications and results of catheterization in our cases have been dicussed. Among the complications, cardiac arrhythmia was the most common but it was seldom serious. Electrocardiographic observation during the procedure showed that premature beats especially of ventricular origin occured nearly in every case. Two patients developed pulmonary edema shortly after catheterization. One of them survived, while the other unfortunately died in spite of energetic treatment. Both were cases of mitral stenosis with marked pulmonary hypertension. In the entire series of 112 cases, catheterization helped us to establish the diagnosis in 107 of them, among which 68 patients were operated upon after catheterization, and in 66 of them the preoperative diagnoses proved to be correct. According to the material presented, right heart catheterization appears to be a comparatively safe and useful procedure in the diagnosis of cardiac diseases.

一、本文分析报告112例住院心脏病病人,120次右心导管檢查的結果。二、本组病例檢查的指征主要是对先天性心脏病及二尖瓣病的診断和外科治疗的选擇。三、对檢查方法加以描述,对影响檢查成敗的因素加以討論。四、分析檢查的結果,认为右心导管檢查对上述心脏病的診断有重大的价值,而危險性不大,但檢查时仍应提高警惕,掌握禁忌証并注意安全防止严重并发症的发生。

The wheat plants subjected to a moderate soil drought at seedling stage gave a greateryield either under full water supply condition or exposed once again to the drought at bootingstage.The rate of drying and the extent of dryness all affected the hardening effect.It seemsthat a relatively long period was necessary for the repair of damage by the drought.An op-posite result was obtained with spring sowing wheat plants because their growth period wasso short that the plants entered reproductive growth before... The wheat plants subjected to a moderate soil drought at seedling stage gave a greateryield either under full water supply condition or exposed once again to the drought at bootingstage.The rate of drying and the extent of dryness all affected the hardening effect.It seemsthat a relatively long period was necessary for the repair of damage by the drought.An op-posite result was obtained with spring sowing wheat plants because their growth period wasso short that the plants entered reproductive growth before they could recover from the damageinflicted on the plants during drought treatment.The plants that had been hardened at seedling stage grew afterwards much better thanthe nontreated plants:the root system renewed and enhanced,the leaf-area of the upmost threeleaves enlarged,the chlorophyll content increased and the rate of accumulation of dry matteraccelerated.A greater ratio of free water to bound water content was observed in such harden-ed plants.Under drought condition the hardened plants were distinguished by heightened intensity ofwater metabolism.They showed a greater water content(especially free water)and alower water deficit.The permeability of protoplasm of hardened plants was less susceptibleto the injury from drought than that of control plants.They also exhibited a greater abilityto withstand dehydration.Thus the increased drought resistance of hardened wheat plantswas not only due to avoidance,but also tolerance.

小麦在苗期经受适度的干旱处理以后,表现了显著的煅炼效果。本文探讨这种苗期干旱煅炼成功的关键,并指出煅炼后提高抗旱性的原因,不仅是对干旱的“避免”,而且还由于对干旱的“忍耐”。

This paper discusses the arc-extinction principle of an air-blast disconnecting switch and the methods of design of the air-blast equipment. The results of laboratory experiments and field tests of the interrupting capacity of this switch-under the conditions of 330 amperes of short circuit current in a 35 kv. power system, and--220 amperes of parallel-connected branch load current in 220 kv. power system,-are also given in this paper. Test results reveal that the length of arc is reduced considerably in such... This paper discusses the arc-extinction principle of an air-blast disconnecting switch and the methods of design of the air-blast equipment. The results of laboratory experiments and field tests of the interrupting capacity of this switch-under the conditions of 330 amperes of short circuit current in a 35 kv. power system, and--220 amperes of parallel-connected branch load current in 220 kv. power system,-are also given in this paper. Test results reveal that the length of arc is reduced considerably in such a disconnecting switch as compared with that in conventional disconnecting switch. After the test upon examination it was found there was only slight pitting on the arcing horns, thus it is concluded that air-blast disconnecting switch can work continuously, no without needing repairs or maintenance,

本文讨论了气吹隔离开关的弧原理及气吹装置的设计方法。文中给出了实验室内 及现场（３５千伏电力系统中切断短路电流３３０安以及２２０千伏电力系统中切断并列负 荷２２０安）的试验结果。由试验结果看出电弧长度比普通隔离开关短得多，触头烧坏极 微，因而对触头不必进行任何检修就能继续工作。

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