Intraperitoneal rupture of ectopic varices--a rare complication of portal hypertension

A 50 year old man presented with sudden abdominal pain, abdominal distension and shock. At emergency laparotomy a large amount of blood was found in the peritoneal cavity. There was micronodular cirrhosis of the liver and the spleen was enlarged. The bleeding was traced to distended veins in the right paracolic gutter which were oversewn and the abdomen closed. A coagulopathy was diagnosed and treatment including high dose aprotinin commenced. However, he continued to bleed and at a second laparotomy the area of previous haemorrhage was packed. Further deterioration continued until death 12 hours later. Intraperitoneal haemorrhage from ectopic varices is a rare occurrence. There is a high mortality rate usually due to an advanced coagulopathy. This is the first report of aprotinin being used in an attempt to treat this. On the basis of this report aprotinin would not seem to be of benefit for this condition.     

HDPE的耐磨蚀性与抗冲击性的研究

用自制的旋臂式磨蚀实验仪，研究了５种高密度聚乙烯和１种顺丁橡胶改性的高密度聚乙烯，在铁尾矿和铁精矿浆体中的耐磨蚀性。耐磨蚀性最差的是ＨＤＰＥ２２００Ｊ，耐磨蚀性较差的是ＨＤＰＥ６３００Ｍ；ＨＤＰＥ５０００ｓ，６０９８和２４８０的耐磨蚀性较好；ＨＤＰＥ／ｃｉｓ－ＢＲ的耐磨蚀性最好。     

I．O．T．旧梦成真

该文较详细地介绍了Ｉ．Ｏ．Ｔ管的发展历程，其特点及工作方式。     

扇形段开口度对两类典型板坯质量缺陷的影响

针对新疆八钢首台板坯连铸生产初期产生的两类典型的裂纹,着重分析了扇形段开口度对三角区裂纹及中间裂纹的影响,介绍了在实际生产中,如何快速分析、判断其原因、对症施措的思路和方法.     

基于IPv6校园网的智能选课系统的J2EE架构的设计与实现

通过分析IPv6校园网自主学习模式下的自主选课问题,提出了利用J2EE技术构建基于IPv6校园网的智能选课系统的总体结构及具体实现.     

衡阳钢管厂Φ89mm半浮芯棒连轧管机组工艺及设备结构特点

衡阳钢管厂Φ８９ｍｍ半浮芯棒连轧管机组是一种新型机组，其选配的变形工艺路线能很好地适应生产小规格的热轧无缝钢管。本文论述了该机组的工艺及设备结构特点。     

光时域反射计衰减特性检定装置

介绍一套“有源法”光时域反射计（ＯＴＤＲ）衰减特性检定装置。对参考量值采取自标定的方法，用一种串联替代法实现对高重复性衰减器３．０１０ｄＢ值的准确标定。该装置检定灵活性强，对ＯＴＤＲ衰减特性检定的不确定度优于０．０２ｄＢ／ｄＢ（９５％置信度）。     

石油天然气长输管线用钢新进展

本文介绍了１９９０年以来国外在石油天然气长输管线用钢方面的最新成果，以获得较低的强度和韧性匹配为目的经轧后加速冷却工艺后的钢的强度的预测和控制；具有优良抗氢致裂纹的含硼、微碳、低硫、Ｎｂ－Ｔｉ微合金化、Ｘ６５－Ｘ８０级管线钢的开发，满足于特殊性能要求的ＴｉＯ处理技术及Ｘ８０级ＴｉＯ细化晶粒钢、低硬度和低屈强比钢，以及复合板加工耐腐蚀钢管的生产。     

Enhanced Oil Recovery: The Synthesis of Anthraquinone [1, 2-C] Alkylisoxazole

Anthraquinone [1, 2-C] methylisoxazole is synthesized from 2-ethylanthraquinone through nitration and treating with oleum. The different methods of 2-ethylanthraquinone nitrated were discussed. The optimum conditions were determined. The structure of the product was confirmed by MS and ¹H NMR.     

Detection of ultrasonic tones and simulated dolphin echolocation clicks by a teleost fish, the American shad (Alosa sapidissima)

The authors previously reported that American shad (Alosa sapidissima) can detect sounds from 100 Hz to 180 kHz, with two regions of best sensitivity, one from 200 to 800 Hz and the other from 25 to 150 kHz [Mann et al., Nature 389, 341 (1997)]. These results demonstrated ultrasonic hearing by shad, but thresholds at lower frequencies were potentially masked by background noise in the experimental room. In this study, the thresholds of the American shad in a quieter and smaller tank, as well as thresholds for detecting stimulated echolocation sounds of bottlenosed dolphins was determined. Shad had lower thresholds for detection (from 0.2 to 0.8 kHz) in the quieter and smaller tank compared with the previous experiment, with low-frequency background noise but similar thresholds at ultrasonic frequencies. Shad were also able to detect echolocation clicks with a threshold of 171 dB re: 1 microPa peak to peak. If spherical spreading and an absorption coefficient of 0.02 dB/m of dolphin echolocation clicks are assumed, shad should be able to detect echolocating Tursiops truncatus at ranges up to 187 m. The authors propose that ultrasonic hearing evolved in shad in response to selection pressures from echolocating odontocete cetaceans.