耐温抗盐聚合物正电胶钻井液在濮2-平1井中的应用

介绍了濮 2 平 1井的地质简况及钻井液的主要技术难点 ,概述了钻井液技术措施及其配方优选。现场应用表明 ,聚合物正电胶钻井液在濮 2 平 1井的应用是有效的     

MHD‐Buoyancy Aiding and Opposing Flows with Viscous Dissipation Effects from Radiate Vertical Surfaces

The combined effects of forced and natural convection heat transfer in the presence of transverse magnetic field form a vertical surfaces with radiation heat transfer is studied. The buoyancy aided flow and the buoyancy opposing flows are investigated with viscous dissipation effects included in the governing equations. It is found that four parameters can describe the problem under consideration, the mixed parameter, χ, the radiation‐conduction parameter, R_d, the magnetic field parameter, Ha²_x/Re_x, and the Eckert number, Ec. The local wall shear stresses and the local Nusselt number variations are drawn for different dimensionless groups.     

Occurrence of acetic acid and formic acid in breakfast cereals

Breakfast cereals are usually manufactured by extrusion followed by drying and toasting steps in which thermal treatments are applied. In addition, owing to the low water activity and the content in cereals of proteins and carbohydrates, precursors of the Maillard reaction, this reaction and degradation of sugars are favoured during processing. Acetic and formic acids have been identified as final products of Maillard reaction (MR) and sugar caramelisation. Acetic and formic acid contents have been determined by ion exchange high‐performance liquid chromatography in 56 commercial breakfast cereals. Results were evaluated taking into account the sample formulation. Acetic and formic acids were detected in all samples, and significant variations were observed for acetic acid depending on the protein and fibre content. Acetic acid, originating from 1‐deoxyglucosone cleavage during MR, proved to be a good indicator of processing in cereals enriched with or based on wheat flour because of their high protein content. Fibre addition increased acetic acid concentration. The application of acetic acid as a chemical marker of processing in breakfast cereals and its possible generation pathways are discussed. Copyright © 2006 Society of Chemical Industry     

复合静电驱动结构致动的内旋转微镜

报道了以体硅表面硅混合微加工工艺制作在SOI衬底上的一种新型复合静电驱动结构致动内旋转微镜,其中复合静电驱动结构由一个平板驱动器和一个垂直梳齿驱动器构成.实验表明,该新型驱动结构不仅能使微镜实现大范围连续旋转,而且能使微镜实现吸合效应致自发性90°旋转.微镜的连续旋转范围扩大到约46°,同时引发吸合效应的拐点电压也增大.对于具有1和0.5μm厚扭转弹性梁的微镜,实测拐点电压分别为390～410V和140～160V.当该微镜用作光开关时,测得光插入损耗为～1.98dB.     

气相色谱法测定腈纶聚合装置混合单体中AN和VA的含量

用气相色谱法测定了腈纶厂聚合装置混合单体中丙烯腈（ＡＮ）和醋酸乙烯酯（ＶＡ）的含量。用该方法测定出变异系数ＡＮ为０．０９％，ＶＡ为０．５６％，回收率ＡＮ为９６％～１０６％，ＶＡ为９９％～１０５％。     

浅谈牛津布之开发及生产

本文介绍了三大类型的牛津布系列产品之开发和生产工艺，并对织物组织结构及外观风格进行了分析叙述。     

水泥土搅拌桩复合地基设计若干问题的研究

根据设计和研究实践经验,对水泥土搅拌桩设计的几个主要问题及计算方法进行了探讨,对水泥土搅拌桩复合地基承载力与沉降及桩长的关系进行了论述     

利用国产粘度杯和混合图确定粘度

介绍了用国产粘度杯和混合液粘度确定图测定油漆、油墨、胶液混合液粘度的原理和方法，从而控制其生产过程中的粘度。     

等厚搅拌水泥土防渗薄墙在中低土坝除险加固中的应用

时等厚搅拌水泥土防渗薄墙在低坝除险加固中的应用进行了分析，指出了质量控制的要点与实施方案。     

~(99)Tc~m-膦混配配合物的制备和生物分布

合成了一个N3S配体（MVNM）和4个膦配体，并以配体交换法在室温下制备了^99Tc^m－MVNM，然后分别与4个膦配体发生混配反应，得到放化纯大于90％的^99Tc^m－MVNM－膦混配配合物。小鼠体内的生物分布实验表明，该类混配配合物有一定的心肌摄取。