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《化工科技市场》2006,29(10):51-52
1苯胺
受吉化苯胺装置爆炸的影响,从2005年底开始,我国苯胺的进口量持续增长。2006年1~8月,苯胺进口量达到61740.4t,而去年同期只有2041.2t。有关专家及本刊已多次呼吁国内苯胺面临产能过剩的问题。至2006年8月底,已经形成的生产能力在82万t/a左右(不计算吉化产能),另有在建装置20万t/a左右,如山东海化(5万t/a)、华阳农化(5万t/a)、江苏响水(3万t/a)等,国内已达年产百万吨以上。下游消费虽然也在稳定增长,但增速仍低于扩能速度,因此国内苯胺在下半年将逐渐呈现过剩的局面。而进口量的激增更不利于国内苯胺产能的消化。本期进口量最大的厂家为烟台万华聚氨酯股份有限公司。 相似文献
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对近年来国内建设的精对苯二甲酸项目,在投资及工艺技术应用方面进行统计分析,项目建设呈现规模不断扩大,项目投资不断降低的趋势,说明PTA工艺技术也在向大型化、规模化发展。同时对今后国内PTA行业发展进行预测,并提出建议:新建PTA经济规模应在60万t/a以上;国家应加强PTA产业布局的调控,引导企业形成产业链优势,避免盲目上马;加快技术创新和政策支持,推进国产化技术不断进步,大力推动装备国产化的提高,降低企业投资成本和风险。通过分析,以便为企业进行PTA项目投资决策提供参考和建议。 相似文献
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高原地区推广使用乙醇汽油的可行性分析 总被引:1,自引:0,他引:1
随着经济的发展,车辆保有量在快速增长,如果高原地区车辆燃用乙醇汽油,既可以改善环境污染,又能提高农副产品的附加值。本文从国家推广使用车用代用燃料的实际出发,通过对乙醇汽油的特性和高原环境对内燃机性能影响的分析,表明在高原地区推广使用乙醇汽油是可行的。 相似文献
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We analyze the effects of gasoline prices and exchange rates on Japanese automobile imports to the United States between 1970 and 2004. We test the relationships before, during, and after the Voluntary Restraint Agreement placed on Japanese imports between 1981 and 1988. We also control for general demand for automobiles and domestically manufactured Japanese vehicles. As expected, we found that demand for Japanese imports is positively correlated with the price of gasoline. Before 1988 the demand for Japanese imports contributed to a strengthening of the yen. But after, a positive relationship between the yen-for-dollar exchange rate and imports has prevailed. 相似文献
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目的:弗尼斯弧菌(Vibrio fumissii)是引起世界范围内胃肠功能紊乱的致病菌之一,一般通过摄人生的或者未煮熟的水产品进行传播。本研究旨在建立高效、可靠的PCR检测方法应用于食品中弗尼斯弧菌的快速检测。方法和结果:根据弗尼斯弧菌的toxS基因分别设计普通PCR引物及实时PCR引物、探针,建立普通PCR和实时荧光PCR方法,分别对两种方法的特异性和灵敏度进行比较分析,同时应用于384份食品样品检测。结果表明,建立的普通PCR和实时荧光PCR方法特异性良好,检测灵敏度分别为:2.4×10^3 CFU/ml和24 CFU/ml,并于5 h内完成整个检测过程,同时对384份食品进行检测,共检出6株阳性菌株。结论:本研究建立的PCR检测技术灵敏度高、特异性好,可应用于食品中弗尼斯弧菌的快速检测。 相似文献
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In this paper, we investigate a gasoline station's incentive to price-discriminate by selling full-service gasoline as well as self-service gasoline. Unlike previous research, we explicitly model a firm's incentive to price discriminate by choosing to be either single-product or multi-product as a function of market and station characteristics. This allows us to make two contributions to research in the area: First, we highlight the importance of accounting for self-selectivity considerations that can arise in an empirical analysis of price discrimination that is based on market data. Second, we are able to show how the product and pricing choices of firms depend upon the market characteristics.Using cross-sectional survey data on prices, station and market characteristics for 198 gasoline stations in the Greater Saint Louis area, we estimate a switching regression model of station decisions. Specifically, we employ a binary probit framework that models a station's decision to price-discriminate through the choice of the station-type as a function of market and station characteristics. We then estimate conditional linear regressions with self-selectivity corrections for the station's choice of prices. We show that incorrect inferences about the incentive to price discriminate and about the differences in the prices charged between single-product and multi-product stations would result if the endogeneity in the choice of the station-type were ignored in the estimation. The empirical analysis shows that a larger income spread in the market implies a greater likelihood of the gasoline station being multi-product. In addition, we have support for the various within firm and across firm price differentials as predicted by the theory of price discrimination. 相似文献