石脑油质量SPYRO分析

石脑油是乙烯装置的重要原料,对烷烃含量不同的石脑油进行PONA值全组成分析,在统一的裂解炉运行条件下进行模拟,建立裂解产物市场价格体系模型,计算吨原料经乙烯装置裂解后的产物总价值。通过变换裂解炉出口温度,得出最佳裂解深度。数据显示,烷烃含量越高经济价值越好,裂解深度最佳点显示丙烯乙烯比在当前市场价格体系下最佳为0.58左右。

Isolation and Identification of a Taxol-producing Endophytic Fungus Identified from Taxus media

[Objective] The aim was to isolate and identify a taxol-producing endophytic fungus from Taxus media. [Method] 32 strains of endophytic fungi were identified form the inner bark of T. media,and their fermentation products were detected by high performance liquid chromatography (HPLC). [Result] Through the screening,a strain of taxol-producing endophytic fungi M57 was obtained,which could produce 45-50 μg/L of taxol,and M57 was defined as Rhizopus sp. through morphological observation and 18S rDNA sequence analysis. [Conclusion] The finding of Rhizopus sp. M57 provided a promising strain for producing taxol with taxol-producing fungi fermentation process.

Development of the Physical Input Monetary Output Model for Understanding Material Flows within Ecological-Economic Systems

利用经济投入产出表所提供的经济数据以及物质流分析所提供的社会代谢数据,建立了物质投入价值产出(PIMO)模型对生态经济系统的代谢进行量化分析。该模型基于一系列经济部门的物质平衡方程,可以较为方便地对生态经济系统的物质代谢进行模拟和分析。以中国为例,本文对该模型的建立和使用进行了演示,各类经济活动对生态经济系统代谢的影响得到了量化。