PE/PS共聚物改性聚烯烃新材料

新型混合PE/PS树脂可作为HDPE、LDPE和PP的一种加工助剂。塑料加工生产商要想获得更薄、更完美的制品,且制品加工设备运行得更快,那么UPES树脂可能是他们要寻找的助剂了。新型UPES树脂是PE和PS的混合物,可作为HDPE、LDPE和PP的加工助剂。其主要作用是扩大聚烯烃的加工范围,同时直接改善某些聚烯烃的性能。这在制品减厚、提高制品产量、     

Mechanoenzymatic Transformations in the Absence of Bulk Water: A More Natural Way of Using Enzymes

Mechanochemical enzymatic reactions without bulk water have emerged as a low-waste and efficient method to access useful chemicals and to depolymerize biomass components in a single step. This emergent mechanoenzymatic reaction strategy is able to take advantage of the stereospecificity, regio- and stereoselectivity, as well as renewability of enzymes, while avoiding bulk solvents, offering the opportunity to control the direction of the reaction, bypassing reactant solubility issues, and enabling reactions with water-sensitive substrates or products. Enzymes are traditionally used in dilute aqueous solution, which is quite different from their crowded, water-depleted natural environment. This review outlines recent work which demonstrates that enzymes can be equally or even more efficient under mechanochemical conditions, without bulk aqueous or organic solvent.     

复合离子聚合物深度调剖堵水剂的研究

以复合离子聚合物、六次甲基四胺、间苯二酚为主要原料,制取复合离子聚合物调剖堵水剂。试验研究了调剖堵水剂的制备工艺,通过性能评价确定是一种成胶时间长、强度高、稳定性好的新型深度调剖堵水剂,可用于深部调剖堵水。     

保护和合理开发利用水资源的对策

本文介绍我国和上海水资源的现状以及保护和开发利用水资源的对策，对策包括控制排污量，防止水体被污染、建立污水处理厂、综合治理污染的河流，节约工业用水，农业用水，城市生活用水，提高用水的重复利用率，加大节水新技术、新工艺、新设备的开发研究；实施阶梯式计量收费。     

测调联动注水工艺及其配套工具的密封性研究

注水是油田开采过程中的重要工艺措施,其目的是为了不断补充地层能量,确保较高的采油速度并提高最终采收率。本文通过分析目前注水工艺存在的问题,提出了一种测调联动的注水工艺。以配水器测调仪之间的密封件为研究对象,运用ABAQUS软件建立了密封件非线性大变形接触问题的力学分析模型,开展了配水器测调仪密封性能研究,得到了保证密封成功的前提下密封圈合理的压缩量。     

配位体交换-流动注射分析法测水中有效氰化物的干扰与消除的探讨

流动注射分析技术(FIA)具有分析速度快、操作简单、试剂和样品消耗小、可实现自动化在线检测等优势,因此近几年已被广泛利用于检测氰化物。CNSolution FS 3100氰化物分析系统结合了流动注射分析技术(FIA)、配位体交换与高灵敏度安培检测器技术,无须在线蒸馏与紫外照射分解即可检测有效氰化物。下面探讨配位体交换-流动注射分析法测水中有效氰化物的干扰和消除。     

Dietary Isothiocyanates,Sulforaphane and 2-Phenethyl Isothiocyanate,Effectively Impair Vibrio cholerae Virulence

Vibrio cholerae represents a constant threat to public health, causing widespread infections, especially in developing countries with a significant number of fatalities and serious complications every year. The standard treatment by oral rehydration does not eliminate the source of infection, while increasing antibiotic resistance among pathogenic V. cholerae strains makes the therapy difficult. Thus, we assessed the antibacterial potential of plant-derived phytoncides, isothiocyanates (ITC), against V. cholerae O365 strain. Sulforaphane (SFN) and 2-phenethyl isothiocyanate (PEITC) ability to inhibit bacterial growth was assessed. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values indicate that these compounds possess antibacterial activity and are also effective against cells growing in a biofilm. Tested ITC caused accumulation of stringent response alarmone, ppGpp, which indicates induction of the global stress response. It was accompanied by bacterial cytoplasm shrinkage, the inhibition of the DNA, and RNA synthesis as well as downregulation of the expression of virulence factors. Most importantly, ITC reduced the toxicity of V. cholerae in the in vitro assays (against Vero and HeLa cells) and in vivo, using Galleria mellonella larvae as an infection model. In conclusion, our data indicate that ITCs might be considered promising antibacterial agents in V. cholerae infections.     

应用存水率与水驱指数评价油田水驱开发效果

对于低渗透油藏,边底水不活跃,天然能量不能得到及时的补充,因此开发难度较大。注水开发能够及时补充地层压力,是目前针对低渗透油藏的主要开发技术。而注水开发油田开发效果的评价对于进一步改善开发效果,提高最终采收率尤为重要。给出了两种评价指标,存水率以及水驱指数的理论计算公式,并分别分析其与含水率的变化关系,指出理论值与实际值产生差异的原因。以X油田为例,应用两种指标进行开发效果分析。