应用多孔阳极氧化电流—时间曲线比较壁垒膜厚

在有壁垒膜存在的表面,多孔膜的生长在氧化初期受到延迟阻碍,这一现象在直流恒压多孔阳极氧化电流一时间曲线上反映出来。电流达到稳态氧化的时间愈长,壁垒膜愈厚。文中应用此法判断了0.5MH_3BO_3介质的pH值、温度对壁垒阳极氧化膜厚的影响,并应用记录同一介质环境壁垒恒流阳极氧化的槽压一时间曲线得到验证。     

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本文简要介绍了国外在开发超酸性气体过程中遇到的材料选择、腐蚀监测、水化物堵塞、超酸性气的处理和加工等问题所采取的措施和办法。     

Analysis of characteristic odors from human male axillae

A number of studies concerning the analysis of axillary odors have assumed that the characteristic odor produced in the axillae is due to volatile steroids and isovaleric acid. Organoleptic evaluation of Chromatographic eluants from axillary extracts was employed to isolate the region in the chromatogram where the characteristic odor eluted. The odor of the dissolved eluant was eliminated when it was treated with base, suggesting that acids make up the characteristic axillary odor. Subsequent extraction of the pH-adjusted axillary extract in conjunction with organoleptic evaluation of the Chromatographic eluant, preparative gas chromatography, and analysis by GC-MS as well as GC-FTIR showed the presence of a number of C₆ to C₁₁ straight-chain, branched, and unsaturated acids as important contributors to the axillary odor. The major odor component is (E)-3-methyl-2-hexenoic acid. Three homologous series of minor components are also important odor contributors; these consist of the terminally unsaturated acids, the 2-methyl-C₆ to -C₁₀ acids and the 4-ethyl-C₅ to -C₁₁ acids. These types of acids have not been reported previously as components of the human axillary secretions and have not been proposed previously as part of the principal odor components in this area.     

DVB在IP机顶盒中的一种实现

描述了一种基于IP网的DVB解决方案，具体描述了该系统的结构，重点讨论了机顶盒中播放以IP为载体的TS流的实现方案，及提高接收能力的关键技术。     

乙醇电氧化的研究进展

简要地叙述了国内外乙醇电催化氧化的研究进展，着重介绍不同电极材料对乙醇电氧化的影响及目前所提山的机理，并对其可能的研究方向提出了建议。     

以市场需求为导向 加强校企合作办学

能否适应市场需求、得到社会认可是衡量高等技术应用型人才的唯一标准。本文提出要确立以市场需求为导向的人才培养观念,适应行业和地方经济的发展需要进行高职高专院校的专业建设和课程改革,并加强校企合作,突出校外实习在高职高专人才培养中的重要地位。     

守望太阳——论诗集《太阳之歌》

运用马克思主义历史———美学批评方法 ,结合多种批评理论 ,对《太阳之歌》诗集进行全面、系统、多角度的读解 ,肯定了它的艺术成就 ,指出它是现实主义的绚丽花朵     

唐山市水环境保护工作的几点做法

河北省唐山市水环境保护范围包括滦河流域，沙、陡河流域，还乡河流域，北三河流域，共有河流70多条，大型水库2座、中型水库3座、小型水库152座。全市正常年份可用水量31．86亿m^3,2006年污水排放量3．8909亿m^3．其中工业污水2．8473亿m^3．生活污水1．0436亿m^3.近年来．该市不断加大水环境保护工作力度，取得了显著成效，滦河、还乡河、沙河、陡河、蓟运河等主要河道水质有了明显改善。[第一段]     

信钢炼钢厂转炉氧枪改造实践

对信钢炼钢厂25t转炉氧枪及喷头存在的缺陷进行分析,结合生产实践,提出了相应的改进措施,提高了冶炼速度,加快炼钢节奏,取得了良好的效果.     

The use of doped polyaniline as an electrode in the galvanic anodic protection of ferrous metals in industrial acid solutions

In order to investigate the galvanic anodic protection (GAP) of ferrous metals (such as 410, 304 and 316 stainless steels) in acid solutions by doped polyaniline (PANi), separate doped PANi powder-pressed electrodes with different surface areas (the area ratio of the PANi electrode to stainless steel is between 1:1 and 1:2) have been prepared. These were coupled with ferrous metal in the following solutions: 5 M sulphuric acid, 5 M phosphoric acid and industrial phosphoric acid (containing 5 M phosphoric acid and 0.05% chloride ion) to construct a galvanic cell, in which PANi is cathode while ferrous metal is anode. The results indicate that a PANi electrode with sufficient area can provide corrosion protection to stainless steel in these acidic solutions. A pilot scale coupling experiment was carried out. The results indicate that PANi is a promising material as an electrode for the anodic protection of ferrous metals in acidic solutions in industrial situations.