抗高温环保钻井液体系研究

文章选择清洁环保的钻井液处理剂进行抗高温钻井液体系实验研究与评价,对包被增粘剂、降失水剂等进行优选,对抗高温环保钻井液配方进行评价,研究出无毒、无害,抗温能力强、流变性好,失水较低的钻井液体系,现场应用满足高温深井的钻井生产要求。     

Magnetic microsphere confined ionic liquid as a novel sorbent for the determination of chlorophenols in environmental water samples by liquid chromatography

Magnetic microsphere confined ionic liquid was synthesized by covalently bonding N-methylimidazolium on magnetic microspheres. The functionalized magnetic microspheres were characterized by Fourier transform infrared (FT-IR) spectrometry, thermogravimetric analysis (TGA) and scanning electron microscopy (SEM). The prepared material was used for the preconcentration of three chlorophenols (CPs) in water combined with high-performance liquid chromatography (HPLC). Several conditions that probably affected the extraction efficiency such as standing time, eluent and its volume, sample pH and volume, were optimized. Under the optimal conditions, good recoveries (70.3-88.8%) were achieved with satisfactory relative standard deviations (RSDs) of less than 6.0%. The limits of detection for the three CPs were 0.20-0.35 μg L(-1). The results indicated that the ionic liquid-functionalized magnetic microspheres show significant promise for the analysis of CPs in environmental samples.     

陕西省精细化地质灾害气象预报预警研究

在黄土高原和秦巴山区地质灾害与降水相关特征分析基础上,介绍了陕西省气象台精细化地质灾害气象预报预警模型与业务系统.利用新一代多普勒天气雷达和自动气象站加密资料实现了综合雨量的精细估计,结合GIS地形地貌信息和历史灾害风险分析确定出降水影响系数后,通过计算指标量与灾害临界阈值判断实现了陕西省l 915个乡镇地质灾害的逐日...     

国外突发事件应急救援标准综述

对美国、澳大利亚、英国、新西兰等发达国家在应急救援领域的标准及规范的建设情况进行了分析研究;总结了这些国家特别是美国应急救援标准建设的特点。对比我国现有的应急救援标准及需求,提出了我国地震应急救援标准建设的建议。     

崖角藤的化学成分

从天南星科崖角藤茎95%乙醇提取物中分离得到10个化合物,通过波谱数据鉴定为羽扇豆醇乙酸酯(1)、羽扇豆醇(2)、β-谷甾醇(3)、桦木醇(4)、桦木酸(5)、硬脂酸(6)、ficubee A(7)、ficubee B(8)、artelastin(9)和β-胡萝卜苷(10).     

盐藻LHCB3蛋白的表达纯化及抗体制备

为了解盐生杜氏藻(Dunaliella salina)主要光捕获蛋白LHCB蛋白的功能,将已获得的盐藻Lhcb3基因构建到原核表达载体pET32a-DsLhcb3,通过优化表达条件,建立了高效的重组系统.pET32a-DsLhcb3在大肠杆菌中的优化表达条件为1 mmol/L IPTG在37℃下诱导4 h.采用镍离子亲合层析纯化获得LHCB3蛋白,并以此为抗原制备了多克隆抗体,经琼脂糖扩散检测效价,在1:16处有明显沉淀.提取盐藻总蛋白,经过制备的LHCB3抗体杂交,在29 000处获得两条明显的杂交条带,为进一步研究盐藻LHCⅡ蛋白表达机理奠定了基础.     

黑曲霉耐热木聚糖酶XYNB在毕赤酵母中的高效表达

高比活木聚糖酶的高效表达是进一步提高木聚糖酶发酵效价、降低生产成本的有效途径.将黑曲霉木聚糖酶基因XynB(不含信号肽)克隆到分泌型表达载体pPIC9K上,线性化后电击转化巴斯德毕赤酵母GS115,G418和PCR鉴定的阳性转化子经0.5%甲醇、在28℃诱导表达.SDS-PAGE分析表明,该蛋白相对分子质量为20×103左右.优化的诱导表达条件为,每隔12 h添加0.5%的甲醇,发酵5 d后,比活达4 757 U/mg;其最适温度为55℃,最适pH为5.0,80℃处理30min后仍有74%的残余酶活.     

大跨径钢管混凝土拱桥减震控制装置参数的研究

大跨度桥梁结构的减震控制研究对于桥梁结构的抗震安全具有重要意义。本文以主跨368m的茅草街大桥为研究对象,基于ANSYS建立了该桥的三维有限元模型,并采用子空间迭代法分析了该桥的动力特性。在此基础上进行了大跨度钢管混凝土拱桥的地震响应及减震控制研究,重点进行了弹性连接装置和粘滞阻尼器减震效果的参数敏感性分析,并对比分析了不同位置布设减震装置时的效果。结果表明,纵飘振型对该桥肋纵向相对位移的贡献最大;弹性连接装置和阻尼器均能有效减小地震作用下该桥的肋梁纵向相对位移;综合考虑各关键部位的地震响应时,同时采用两类减震装置并将其分散布置时的减震效果最佳。结论可供大跨度中承式钢管混凝土系杆拱桥的抗震设计参考。     

A software based simulation for cleaner production: A game between manufacturers and government

This paper shows how game theory could be applied to better assess the various strategies available to government and manufacturers to promote more environmentally friendly products through cleaner production by examining several different game scenarios . In order to demonstrate the problem situation of cleaner production more visually, the ‘Gambit’ software package is used to simulate the created game models conceived as “two person non-cooperative” games. The application of game theory is shown to provide a useful insight into strategic decision making by both government and manufacturers. The limitation of the game model and the associated analysis is also discussed, laying a foundation for further work.