漆酚磺化树脂的合成和催化酯化反应

介绍漆酚磺化树脂的合成方法,并对树脂进行了红光谱分析。探索了漆酚磺化树脂对乙酸和正戊醇酯化反应的催化作用,结果表明,酯化产率为72．5％。     

小流域地貌结构与农林牧综合发展关系的研究

小流域的横向地貌结构,纵向地貌组合以及地面坡度组成,共同决定了流域内生态环境的分异,制约着流域内农业生产结构和生产布局,充分复发挥流域自然生产潜力,需要根据地貌结构,建成农,林,牧,副,渔综合发展的复合生态经济系统。     

川芎提取物对家兔缺血心电图的影响

人工制成急性心肌缺血性动物模型，其心电图显示Ｔ波高耸、双向和倒置、Ｓ－Ｔ段抬高等缺血样改变。在导联保持原位的前题下，注射川芎提取物（川芎嗪），家兔心电图立即显示出复原的改善。     

变结构电力系统断相故障的新算法

提出了一种仿真计算变结构与变参数电力系统不对称断相故障电气量值的新方法，以求取各序网故障口的等值电路参数与故障口电流以及各序网的节点电压与支路电流的故障分量。并通过算例验证了本文方法。     

Modulation of antibody synthesis by an anti-tumour alga

Summary An unicellular alga,Chlorella pyrenoidosa, which had been reported to protect C₃H mice against sarcoma BP8, is shown, when injected in Freund's incomplete adjuvant, to modulate the antibody synthesis induced by immunization with a hapten-carrier complex.C. pyrenoidosa appeared to be able to initiate an antigenic competition between hapten and carrier determinants of the antigen molecule during antibody synthesis, and thus it could be speculated thatC. pyrenoidosa modulates the immune response at the macrophage level.Acknowledgments. This work was supported by the Secrétariat d'Etat aux Universités and by the DGRST, grant No. 77.71347.     

宁夏沙湖旅游区水环境与旅游业发展研究

在分析了宁夏旅游业发展的理论基础上，定性定量相结合，对沙湖16a来的水质变化特征，结合旅游人数的变化特点进行了趋势分析，发现综合污染指数与旅游人数相关，基本变化趋势一致，结果显示，随着旅游人数的增加，水污染呈逐年上升趋势，对个别污染物更应给予高度重视，提出了宁夏沙湖旅游区应走生态旅游的道路，并提出了一些基本措施和对策．     

心脏信号处理进展

本书是关于如何提取、分析心电图（ECG）信号不同特征的论文集，由南洋理工大学访问教授U．R．Acharya等四位学者主编。该书包含不同作者撰写的20篇论文，分为20个章节。这些论文论述了在不同阶段提取、分析心脏信号特征的方法，以及如何通过这些特征对心脏功能进行正确判断和分类。     

超临界压力蒸汽发生器注汽方案的研究及应用

为了解决埋深超过 2 0 0 0m的深层稠油开采难的问题 ,提出了一种超临界压力蒸汽发生器的开采方案 ,并与其他注汽方案进行了比较 ,同时研究了超临界压力热流体在地面管线和井筒中流动的规律。结果表明 ,利用超临界压力热流体注入井底后不仅能提高注入压力 ,而且减少了热损失。采用超临界压力蒸汽发生器能解决常规注汽难的问题 ,有利于开发深层稠油。超临界压力水注入井底时 ,井底注入压力比常规注汽井底压力增大 1 5MPa以上 ,且流量越小 ,压力增加越明显     

胰岛素原转化酶基因克隆及序列测定

目的研究胰岛素抵抗和胰岛素缺乏与Ⅱ型糖尿病发病机制的关系.方法Ⅱ型糖尿病普遍存在胰岛素、胰岛素原障碍,胰岛β细胞分泌出胰岛素原经胰岛素原转化酶(Prohormone convertase,PC2)去除部分肽段后形成胰岛素.结果与结论若PC降解功能异常可导致胰岛素原及其代谢产物不适当分泌引起胰岛素缺乏,研究该基因分布和表达的变化,对探讨糖尿病胰岛素抵抗的发病机制奠定基础.     

Roasting and leaching behaviors of vanadium and chromium in calcification roasting–acid leaching of high-chromium vanadium slag

Calcification roasting–acid leaching of high-chromium vanadium slag (HCVS) was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium. The effects of the purity of CaO, molar ratio between CaO and V₂O₅ (n(CaO)/n(V₂O₅)), roasting temperature, holding time, and the heating rate used in the oxidation–calcification processes were investigated. The roasting process and mechanism were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetry–differential scanning calorimetry (TG–DSC). The results show that most of vanadium reacted with CaO to generate calcium vanadates and transferred into the leaching liquid, whereas almost all of the chromium remained in the leaching residue in the form of (Fe_0.6Cr_0.4)₂O₃. Variation trends of the vanadium and chromium leaching ratios were always opposite because of the competitive reactions of oxidation and calcification between vanadium and chromium with CaO. Moreover, CaO was more likely to combine with vanadium, as further confirmed by thermodynamic analysis. When the HCVS with CaO added in an n(CaO)/n(V₂O₅) ratio of 0.5 was roasted in an air atmosphere at a heating rate of 10℃/min from room temperature to 950℃ and maintained at this temperature for 60 min, the leaching ratios of vanadium and chromium reached 91.14% and 0.49%, respectively; thus, efficient extraction of vanadium from HCVS was achieved and the leaching residue could be used as a new raw material for the extraction of chromium. Furthermore, the oxidation and calcification reactions of the spinel phases occurred at 592 and 630℃ for n(CaO)/n(V₂O₅) ratios of 0.5 and 5, respectively.