“埃米妇康”女士凝胶抗菌器治疗阴道炎等107例观察

探讨纳米银抗菌器治疗阴道炎、宫颈糜烂的疗效。用抗菌器将纳米银凝胶注入阴道深部,六天一个疗程。结果显示,阴道炎56例,治愈率89.3%,有效率96.4%;冶疗宫颈糜烂51例,总有效率为84.3%,其中治疗轻度宫颈糜烂有效率为94.7%,中度宫颈糜烂有效率81.5%,对单纯型宫颈糜烂有效率为100%。纳米银抗菌器对阴道炎,轻、中度宫颈糜烂及单纯型宫颈糜烂有很好的疗效。     

Fabrication of MgB2 superconducting films by different methods

MgB₂ superconducting films have been successfully fabricated on single crystal MgO(111) and c-AL₂O₃ substrates by different methods. The film deposited by pulsed laser deposition is c-axis oriented with zero resistance transition temperature of 38.4 K, while the other two films fabricated by chemical vapor deposition and electrophoresis are c-axis textured with the zero resistance transition temperature of 38 K and 39 K, respectively. Magnetization hysteresis measurements yield critical current density J_c of 10⁷ A/cm² at 15 K in zero field for the thin film and of 10⁵ A/cm² for the thick film. For the thin film deposited by chemical vapor deposition, the microwave surface resistance at 10 K is found to be as low as 100 μΩ, which is comparable with that of a high-quality high-temperature superconducting thin film of YBCO.     

旋转磁场对Al—Cu合金结晶组织影响的研究

本文详细地论述了对在旋转磁场作用下Al-Cu合金的铸造试验，给出本试验的目的、方法、过程以及实验原理，并分析了铸造后的Al-Cu合金的组织和性能。     

线性约束优化问题的共轭梯度型算法及其收敛性

将共轭梯度法与广义投影技术相结合，给出了一个求解带线性等式、不等式约束优化问题的共轭梯度型算法，证明了算法的性质及全局敛性，首次将共轭梯度法推广应用于求解带约束条件的优化问题。     

中间梯度电剖面法在探测大坝渗漏中的应用

小南川水库大坝发生严重渗漏后，首次应用中间梯度电剖面法技术对渗漏范围及通道进行了探测，取得了很好的效果。本文着重介绍探测的技术方法，结果及经验。     

Designing fuzzy inference system based on improved gradient descent method

1. INTRODUCTION Estimating an unknown complex nonlinear function from a set of input-output data has become a key issue in intelligent control field[1]. Although the theory of traditional equation based approaches is well devel- oped and successful in practice, there has been a great deal of interest in applying model-free methods such as fuzzy and neural techniques for nonlinear function approximation. One of the main reasons for this is that accurate mathematical models do not always exi…     

Isoforms of soluble alpha-tubulin in oocytes and brain of the frog (genus Rana): changes during oocyte maturation

Rana oocytes have previously been shown to contain much more soluble tubulin than does the brain, suggesting different assembly and disassembly dynamics of frog oocyte tubulin compared to that in brain. By using centrifugation, SDS-PAGE, two-dimensional gel electrophoresis and Western blots, probed with anti-α-tubulin monoclonal antibodies, polymorphic α-tubulins (isoforms) were compared in brains and follicle-enclosed oocytes of northern (Rana pipiens) and southern (R. berlandieri) frogs. Oocyte tubulin in both species had isoforms with greater ranges of isoelectric point (pI) than those of brain tubulins; in particular, the oocyte tubulin pIs ranged further into the acidic region of the isoelectric-focusing gels than corresponding brain tubulin. This difference may, in part, be responsible for the previously reported assembly differences between oocyte tubulin (undetectable assembly) and brain tubulin (high assembly). Isoforms of α-tubulin with relat ively acidic pI were more abundant in northern frog brain and oocyte soluble extracts than in analogous extracts from southern frogs. Furthermore, additional acidic α-tubulin isoforms were found in progesterone-treated oocytes (i.e., eggs), indicating increased heterogeneity of acidic a-tubulin isoforms during oocyte meiotic maturation. Among northern frog oocyte soluble components fractionated on Superose-6b columns, tubulin complexes with apparent molecular mass of about 1800 kDa were found to contain acidic α-tubulin isoforms while the putative oligomeric tubulins with an apparent molecular mass of about 250 kDa contained an additional relatively basic α-tubulin isoform. The acidic α-tubulin isoforms, therefore, are proposed to be associated with cold-adaptable cells of brain and oocytes, and may also be involved in stabilization of large soluble tubulin complexes in oocytes of the northern frog. Received 1 October 2002; accepted 9 October 2002 RID="*" ID="*"Corresponding author.     

三维空间场可引入几个"度”

对微分的外乘积、外微分形式做了初步的介绍,运用它同三维空间的梯度、旋度、散度相对应。指出在三维空间中只可引入梯度、旋度、散度、除此之外不可能再引入其它与之相对应的“度”。     

适用于多重强峰的脉冲梯度场自动匀场技术

提出了一种适用于高分辨率ＮＭＲ的快速,通用且可靠的全自动均方法。利用一个带有预饱和辐照的脉冲梯度场匀场序列来提高具有多重强峰的样品在Ｘ轴方向高阶匀场的质量。通过对Ｚ轴磁场梯度和匀场线圈电流的多项式拟合,以获得磁场不均匀而引起的相位分布。该方法不仅简化了具有多重强峰时匀场最优化过程,而且能够扩展到包括非轴向的三维自动匀场。     

钒酸盐和脲对锯缘青蟹碱性磷酸酶的抑制作用

钒酸盐（偏钒酸钠、钒酸钠、偏钒酸铵、联吡啶过氧钒酸钠）和脲作为养殖环境的污染物对锯缘青蟹碱性磷酸酶的酶活力有明显的抑制作用,抑制程度随着抑制剂浓度的增大而增强。钒酸盐对酶的抑制类型均为竞争性抑制,而脲为非竞争性抑制;在脲浓度低于７．０ｍｏｌ／Ｌ时,２５℃与脲处理２．５ｈ的酶的抑制失活作用是可逆的。钒酸盐和脲对酶有协同抑制作用。