牛磺酸单独使用及与潘生丁联用时对血小板聚集性的影响

牛磺酸对花生四烯酸,氯化钙和胶原诱导的大鼠血小板的聚集有明显的抑制作用,潘生丁对胶原诱导的兔洗涤血小板有明显的抑制作用,潘生丁与牛磺酸合用时对胶原诱导的兔洗涤血小板有明显的抑制作用,其抑制兔血小板的IC_(50)比潘生丁单独使用时小,两者相比较有极显著差异.     

Study on<Emphasis Type="Italic">Bombyx mori</Emphasis> silk treated by oxygen plasma

Study of the morphology, aggregation structure and properties ofBombyx mori silk treated by low temperature oxygen plasma showed that slight flutes appeared on the surface ofBombyx mori silk fiber and that its surface structure changed after plasma treatment. The conformation also changed and crystalline degree decreased. The stannic filling rate of treated fiber was improved. Because of etching, the weight of the fiber decreased but the breaking strength changed little after short-time treatment. Project (No. 50073013) supported by the National Natural Science Foundation of China     

大面积微波CVD反应腔中电磁场分布的研究

根据大面积微波CVD反应腔的简单模型，采用FIT算法计算了腔内的电磁场，并用计算机模拟了反应腔中电磁场的分布，寻找影响腔内电磁场分布的参数，试图为大面积金刚石膜微波反应腔的设计提供一定的依据。     

氩离子凝固术治疗消化道息肉疗效观察

[目的]探讨氩离子凝固术对消化道息肉的治疗作用.[方法]采用德国ERBE公司生产的APC300型内镜专用氩气刀对消化道息肉进行氩离子凝固术.[结果]121例息肉患者,其中食道息肉15例,胃息肉14例,十二指肠息肉10例,结肠息肉62例,直肠息肉15例,全部一次治愈,少数患者出现腹胀、腹部隐痛,无出血、穿孔等并发症出现.[结论]氩离子凝固术治疗消化道息肉疗效确切、安全.     

血浆和尿液中尿酸的快速测定

在B ritton-R ob inson缓冲体系中(pH 7.5),研究了尿酸的伏安行为。实验表明,尿酸在悬汞电极上具有吸附行为,并于-0.08V(vs SCE)产生灵敏的峰电流。尿酸浓度在2.0×10-8~1.0×10-5m o lL-1范围内与吸附峰电流成线性关系,检出限可达1.0×10-8m o lL-1,该法可用于尿液和血浆中尿酸的测定,回收率为95~105%。     

等离子体共振表面波的分析

研究具有轴向线性密度特性的非均匀圆柱冷等离子体的表面波,得到了碰撞等离子体时纯表面波在横磁模式下的实频率、衰减速率和特征函数,并且考虑了等离子体共振的情况.结果表明,在等离子体共振时的位置处,特征函数有极大值.     

TM_（010）腔内等离子体参数的探测

借助光纤采光器，研究通常情况下封闭ＴＭ０１０腔内等离子体某些参数的分布情况（包括等离子体的长度及噪音功率频谱）。实验结果表明，腔内等离子体长度与微波入射功率的大小成线性关系，噪音功率频谱沿等离子体长度方向有较大的差异。     

The creatine content of Creatine Serum™ and the change in the plasma concentration with ingestion of a single dose

Three samples of Creatine Serum? ATP Advantage from Muscle Marketing USA, Inc. were assayed for creatine by two different techniques by four independent laboratories, and for creatinine by two different techniques by two laboratories. A further sample was assayed for phosphorylcreatine. Dry weight and total nitrogen were also analysed. Six male volunteers ingested in random order, over 3 weeks: (A) water; (B) 2.5?g creatine monohydrate (Cr?·?H₂O) in solution; and (C) 5?ml Creatine Serum? (reportedly containing an equivalent amount of Cr?·?H₂O). Blood samples were collected before and up to 8?h after each treatment and plasma was analysed for creatine and creatinine. Eight-hour urine samples were analysed for creatine. Ingestion of 2.5?g creatine monohydrate in solution resulted in a significant increase in plasma creatine (from 59.1±11.8?μmol?·?l^?1 to 245.3±74.6?μM μmol?·?l^?1; mean±s) and urinary creatine excretion. No increase in plasma or urinary creatine or creatinine was found on ingestion of Creatine Serum? or water. Analysis showed 5?ml of Creatine Serum? to contain <10?mg Cr?·?H₂O and approximately 90?mg creatinine. Phosphorylcreatine was not detectable and only a trace amount of phosphorous was present. Total nitrogen analysis ruled out significant amounts of other forms of creatine. We conclude that the trace amounts of creatine in the product would be too little to affect the muscle content even with multiple dosing.     

过度训练对大鼠肠道sIgA和血浆内毒素含量的影响以及谷氨酰胺的干预作用

目的:探讨过度训练对肠道slgA和血浆内毒素含量的影响及其谷氨酰胺的干预作用和机制.方法:实验大鼠随机分为对照组、过度训练组、谷氨酰胺干预组,过度训练组大鼠进行每周6次,共9周的力竭性运动训练,谷氨酰胺干预组大鼠在大负荷运动之前按1.5 g/kgBW剂量补充谷氨酰胺,9周后,检测各组大鼠小肠slgA、Gln、MDA的含量及SOD活性.结果:1)与对照组比较,过度训练组大鼠小肠sIgA含量显著下降;且小肠SOD活性、Gln含量显著下降,MDA含量显著升高.2)与过度训练组相比,Gln干预组小肠slgA和Gln的含显著升高,虽然SOD活性没有显著性变化,大鼠小肠组织中MDA含量显著降低.结论:1)过度训练导致大鼠肠道体液免疫功能显著下降;过度训练时大鼠肠道Gln水平下降和自由基代谢的增强,可能是过度训练引起肠道免疫功能降低的主要机制.2)补充Gln可改善长期大负荷运动训练大鼠肠道体液免疫功能;而Gln的补充可使大负荷训练大鼠肠道Gln含量升高和氧自由基生成减少,可能是Gln补充防止大负荷训练大鼠肠道体液免疫功能下降的主要机制.     

等离子割炬喷嘴热－流耦合分析及优化设计

等离子割炬工作原理复杂,喷嘴在冷却水温度场和流场耦合作用下工作,实物实验难度较大,文章采用CFD软件针对两种割炬喷嘴进行数值模拟,分析在不同冷却水流速度下的温度云图和温度曲线图,确定喷嘴结构,给出建议冷却水流速度。