利用混合C9重芳烃回收磺酸盐装置的技术经济分析

介绍了回收磺酸盐生产工艺 ,对其装置的产品成本进行了测算 ,并对盈亏平衡及其敏感性进行了分析 ,进而确定了主要经济指标。     

Influence of chlorsulfuron herbicide on size of microbial biomass in the soil

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利用干酪根固体~(13)C核磁共振法研究下古生界碳酸盐岩的热演化程度

应用固体~(13)C－NMR技术对下古生界,海相碳酸盐岩干酪根的化学组成和结构特征进行研究，提出应用该技术所测算的干酪根结构参数“芳核平均结构尺寸”能较准确地反映碳酸盐岩的热成熟度。首次提出芳核平均结构尺寸与镜质体反射率之间的关系在干酪根的热演化过程中具有“三段式”特征。利用这一成果对华北地区下古生界成熟度进行了测定，与地质背景甚为吻合。     

Utilization of Bagasse Energy in Thailand

Bagasse, a biomass fuel, is the waste generated by the sugar-making process from sugar cane. Sugar making is one of the most important agricultural-produce processing industries for developing countries in Southeast Asia, Latin America and Africa. As sugar producing plants need electric power and process steam, co-generation using bagasse as an alternate fuel for petroleum has been in use for some time. Thailand recently became one of the largest sugar exporters by enlarging plant capacities and improving equipment, thus reducing its production cost. In addition, the Thai government promotes power generation using bagasse as a means to combat global warming by raising the purchase price of the surplus power. The industry is in the process of further raising the plant capacity, and improving the power-generating efficiency. This will enable a plant to generate more electric power than its in-plant need so that the surplus power can be sold to the commercial grid. It also plans to become a local power supplier during off-season of sugar making by adding a condensing turbine generator. A typical Thai sugar plant of the latest design generates steam of 4Mpa at the bagasse boiler outlet with the temperature of 400°C at 84% boiler efficiency. With the bagasse LHV of 7,540 kJ/kg and that of fuel oil 41, 840 kJ/kg, and taking 90%as oil-burning boiler efficiency, 5.95 kg of bagasse would replace 1 kg of oil. The Kyoto Mechanism defines CO₂ generation by fuel oil as 2.65 kg per liter. Using 0.85for the specific gravity of fuel oil, the amount of CO₂ generation will be 3.12 kg-CO₂/kg. Therefore, CO₂reduction per ton of bagasse in terms of fuel oil will be: 3.12/5.95 =0.524 kg-CO₂/kg-bagasse. As 1 kg of bagasse generates 2 kg of steam, the CO₂reduction of a 100t/h steam boiler will be112,660 ton/year for an annual operation of4,300 hours, as follows. 0.524 × 100/2 = 26.2 t-CO₂/h, 26.2 × 4,300 =112,660 t-CO₂/year. This revised version was published online in August 2006 with corrections to the Cover Date.     

SBR工艺处理维生素C废水试验研究

采用颗粒污泥和普通絮体污泥SBR反应器对维生素C生产废水进行可生化性对比试验研究，结果表明，在进水CODcr为400—1800mg／L，运行周期为8h，其中曝气时间为5．5h，换水比为80％的条件下，颗粒污泥反应器CODer去除率为75-90％，污泥浓度介于6．11～8．32g／L，污泥指数为20～40mL／g.     

污水生物处理过程中的同步硝化反硝化研究概况

在好氧生物氧化过程中通过控制反应器内 DO浓度、C/N比、污泥负荷的条件下 ,观察到较明显的同步硝化反硝化现象 ,通过控制反应条件 ,可使硝化、反硝化速率都得以同步提高。     

单片机串口通信平台的搭建

文章介绍了串口通信的基本概念、基本原理、RS-232C标准、地震数据采集器与MCS-51单片机的通信连接，同时介绍了串口通信在地震数据传输中的实际应用。     

New process for anaerobic treatment of Vitamin C wastewater in a full scale plant

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Technical and theoretical considerations in the HLA typing of amniotic fluid cells for prenatal diagnosis and paternity testing

HLA typing of amniotic fluid cells has been used for the prenatal diagnosis of the HLA linked diseases congenital adrenal hyperplasia (21-OH-deficiency (21-OH-def) type) and complement C4 deficiency and it has also been used for the prenatal de termination of paternity. There are, however, technical difficulties in this test associated with the weak expression of some B locus antigens on amniotic fluid cells, and theoretical difficulties related to associations between particular HLA antigens and the 21-OH-def allele. Since certain HLA-B locus antigens are found in significantly increased frequencies among patients with 21-OH-def, there is a relatively high incidence of HLA-B homozygosity among the patients and over 40 percent of the parents of these patients share one or more HLA-B locus antigens. Results of some prenatal HLA typing tests may thus be difficult to interpret, and supplementary tests should be used whenever possible. HLA typing of amniotic cells is, however, the only available procedure for prenatal diagnosis of C4 deficiency and it is the best available procedure for prenatal determination of paternity. A modification of our original procedure allows HLA typing to be performed with increased numbers of HLA typing sera, and sera with optimum reactivity for amniotic fluid cells have now been selected for the definition of most of the more commonly expressed HLA antigens. Although amniotic fluid cells do not express DR antigens, amniotic fluid cells can be typed for the HLA-linked marker glyoxalase I (GLO) and this may be the informative for prenatal diagnosis in some cases.     

Decomposition of CF3CI by corona discharge

In this paper pulsed corona discharge is shown to be effective for the decomposition of CF₃Cl(Freon-13).The pressure of CF₃Cl was 2.67×10³Pa,after discharged for 2 min,39.5% of CF₃Cl was decomposed.The products were mainly CF₄,Cl₂ and CF₂Cl₂.The yield increased by adding O₂ or air.Under the same conditions,more than 94% decomposition yield was obtained if 5.32×10³Pa O₂ or air was added.The composition of products became CF₂O,Cl₂ and CF₄.While the partial pressure of O₂ or air reached 1 arm,the decomposition yield decreased to 54.5% and 48. 5% respectively.