Nitric oxide-related pancreatic endocrine responses to hyperglycaemia in the conscious calf

Mean plasma insulin concentration was reduced and mean plasma glucose concentration increased following the administration of N-nitro-L-arginine methyl ester (L-NAME; 100 mol kg^–1 i.a.) in conscious calves given continuous infusions of exogenous glucose (30–60 mol min^–1 kg^–1 i.v.). It is concluded that the rise in plasma insulin concentration which occurs in these animals in response to glucose is mediated, at least in part, by a nitric oxide-related factor (NOx).     

液相浸渗中纤维非润湿性的处理

纤维与金属液的非润湿性是液相浸渗制造纤维增强金属基复合材料的主要障碍之一。实验发现纤维的非润湿性使其在自然排布时的浸渗缺陷必须存在。通过提高液相浸渗压力可以改善复合材料的浸渗效果,但仍有细小的浸渗缺陷必然存在。通过提高液相浸渗压力可以改善复合材料的浸渗效果,但仍有细小的浸渗缺陷无法消除,采用颗粒与纤维的混杂使纤维丝相互分离,消除了充填“死角”而使纤维束内完整充填并且均匀分布,提高浸渗压力和混杂预制     

Progress in magnetic couple system of nitroxidemetal complexes

Metal_radical method is an effective approach to synthesizing magnetic molecular materials. With the development in decades, the study of nitroxide_metal complexes has made great progress in model, theoretical treatment and design of molecules. Several mechanisms of the metal_radical magnetic coupling are discussed. Molecular magnetic project of nitroxide_metal complexes has made fruitful achievements, but crystal magnetic project is difficult to be controlled, and it is a challenge to chemists. The studies on nitronyl nitroxide_metal complexes are summarized. At present, there are three major approaches to increasing the T c of the metal_radical compounds: (ⅰ) Searching for nitronyl nitroxide ligands that can yield 3_D ferro_ or ferrimagnetic structures; (ⅱ) decorating the structure of radicals with the aim to enhance the coordinate capability of radicals; (ⅲ) grafting polynitroxide radicals as a versatile bridge. The third approach, namely searching for polynitroxide ligand, will serve as a hopeful strategy for exploring higher T c radical molecule_based magnets.     

血清金属元素含量与缺血性脑血管病相互关系探讨

对缺血性脑血管病（ＩＣＶＤ）患者血清Ｚｎ、Ｃｕ、Ｃｒ、Ｍｇ元素进行测定,结果表明患者血清Ｃｕ、Ｃｒ、Ｍｇ含量比对照组低,Ｚｎ含量和Ｚｎ／Ｃｕ比值比对照组高,测定患者Ｚｎ／Ｃｕ比值较测定单一元素Ｚｎ、Ｃｕ更有意义。     

氧化铝超细粉体的表面吸附改性

本文选用十二烷基苯磺酸钠（SDBS）,氯化十四烷基吡啶为改性剂,探讨其在Al2O3／H2O的固液界面上的吸附等温线,同时测定了Zeta电位与粒子平均孔径讨论其吸附机理;为考察改性效果测定了样品的红外光谱、粉末接触角、悬浮体的稳定性,粒子平均大小等物化性质．     

晋江市潮间带底质,生物体中重金属含量及其分布特征

研究福建省晋江市潮间带底质、生物体内重金属含量的分布特征及其主要影响因素．结果表明：表层底质重金属除总Ｈｇ之外,Ｃｕ、Ｐｂ、Ｃｄ和总Ｃｒ含量在河口、半封闭海湾明显高于紧临台湾海峡的海湾及开敞海区,并且,近年来底质的这些重金属含量大多数呈递增趋势;底质的重金属除总Ｈｇ之外,其他的含量都与底质类型及有机质含量有较好的相关性;３种经济贝类对重金属的富集能力分别为：牡蛎,缢蛏和蛤对Ｃｕ的富集系数分别为ｎ×１０４,ｎ×１０３和ｎ×１０３;３种贝类对Ｐｄ和Ｃｄ的富集系数均为ｎ×１０２．     

对电子束蒸发沉积的ZnO：Al膜电学性能的研究

使用电子束蒸发法沉积了铝掺杂的氧化锌透明导电膜。     

暂态过程中金属电导率的探讨

分析暂态过程驰豫时间的不合理性,估算出暂态过程中金属电导率σ≈１ｓ·ｍ－１,即比稳态时的电导率小７个数量级左右．     

气相生长碳纤维的制备

以苯和氢气为原料在石墨,陶瓷等基板表面催化热解制取低成本,高性能的气相生长碳纤维（ＶＧＣＦ）,实验考察了催化剂类热解温度、热解时间,苯带入量,载气,基板材料等参数对ＶＧＣＦ生长情况及性能的影响,并提出了碳纤维的生长机理。结果表明,在合适条件下,用直接播种法制得的ＶＧＣＦ直径为０．７￣１０μｍ,长度为１￣５μｍ,采用金属原子溅射沉积的基板可得到均匀稠密的ＶＧＣＦ,直径为３￣８０μｍ,碳纤维的生长过程     

高分辨率磁旋转编码器磁鼓材料的研制

采用磁浆涂布工艺制作了磁鼓涂层材料.研究了不同组分的配方对磁鼓涂层材料性能的影响,制备出性能良好的磁鼓.对Φ32～40mm的磁鼓进行了充磁测试,写入了128和256对极.采用金属薄膜磁电阻传感探头检测磁鼓表面分布磁场,信号通过电路放大、整形后接入示波器和计数器,结果显示输出信号波形良好,计数完整.